Switched mode power supply unit |
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IPC classes for russian patent Switched mode power supply unit (RU 2513902):
 Device, system and method of uninterrupted power supply / 2506680
Application: in the field of electrical engineering. Uninterrupted power supply source (12) includes input (18) configured for connection to alternate-current supply source (14), direct-current supply source (20), output (22) configured for receipt of power supply from at least one alternate-current supply source (14) and direct-current supply source (20), the first switchable output receptacle (24) connected to output (22) and configured for connection to the first electrical load (16) and the second output receptacle (26) connected to output (22) and configured for connection to the second electrical load (16). Uninterrupted power supply source also includes control unit (34) configured to provide the first configuration related to the first switchable output receptacle (24); at that the first configuration is used by control unit (34) in order to control connection of the first switchable output receptacle (24) to output (22) notwithstanding the second output receptacle (26).
 Device for uninterrupted automatic load transfer / 2503114
Device comprises two three-phase transformer-rectifier devices made in accordance with a multi-bridge rectification circuit (rectification bridges). The multi-bridge rectification circuit comprises a three-winding transformer with two secondary windings connected as "star" and "delta", which with their inlets are connected to two inlets of the main and reserve three-phase circuit continuously, a molecular energy accumulator, a three-phase inverter and three-phase thyristor switches, and thanks to thyristor switches, synchronisation is provided for three-phase inverters during connection (disconnection) of a faulty three-phase inverter from AC buses.
 Intelligent voltage converter / 2499348
Device comprises the main and the reserve AC circuit of 3-50 Hz, 380 V, the first, second and third switchboard, the first, second and third filter, the first and second rectifier, the first and second current sensor, an inverter, a transformer, a group of stabilised DC voltage consumers, a power supply unit, a unit of power switch drivers, a temperature sensor, a voltage sensor, a microcontroller, a control and indication panel, a unit of fans and an external system of remote control and monitoring, the device includes a limiter of start-up current, and the microcontroller is made as capable of monitoring the voltage value of the first and second AC circuit 3-50 Hz, 380 V, monitoring of the current value at the inverter inlet, monitoring of actuation in the unit of protection and the unit of power switch drivers by high current in open thyristors of the inverter, monitoring of the value of voltage and current of consumption by the group of stabilised DC voltage consumers, and with the possibility for control of the first, second and third switchboard, control of the unit of power switch drivers.
 Automation reconnection of accumulator battery / 2498478
Uninterrupted power supply system (50) includes power converter circuit (52) configured to convert alternating input power to the first DC power and to convert second DC power to the first DC power, pack (56) of accumulator batteries configured to supply the second DC current, power transfer mechanism (54) connected to power converter circuit (52) and pack (56) of accumulator batteries which is shifted selectively between open and close positions, at that power transfer mechanism (54) connects pack (56) of accumulator batteries to power converter circuit (52) in closed position and isolates pack (56) of accumulator batteries from power converter circuit (52) in open position, and control circuit (62) configured to transmit control signal, at that power transfer mechanism (54) includes electric drive (60) connected to control circuit (62). At that electric drive (60) responses to control signal by changing power transfer mechanism (54) from the open position to the closed one.
 Safety device for backup power source at electrical signalbox / 2498477
Device contains accumulator battery divided into sections with safe voltage which is installed at the electrical signalbox; at the electrical signalbox there is multicontact component which operating contacts are switched on between sections of the accumulator battery, hand-operated disconnector and fire detectors connected to communication channel with alerting device installed at control panel of the station duty officer; at the control panel there is device for remote tripping control which normally closed output contact is connected in-series with normally closed output contact of hand-operated disconnector is switched on to the circuit feeding electric magnet of multicontact component.
 Device for protection against power loss at substations of enterprises with process standby / 2496210
Device includes power direction monitoring unit, startup unit of minimum frequency, the first logic unit, the first timer, the first actuating unit, minimum voltage monitoring unit, the second timer, the second actuating unit, the third timer, the second logic unit, the first and the second monitoring units of state of switches of electric motors, the third logic unit and the third actuating unit. The first actuating unit is the output of the first power loss protection stage and it acts on deactivation of switch of input of bus section of 6 (10) kV switchgear, which lost the power, and on field suppression of synchronous electric motors. The second actuating unit is the output of the second protection stage and it acts on deactivation of synchronous electric motors in bus section which lost the power. The third actuating unit acts on deactivation of one electric motor in case two electric motors operate on one section of buses of switchgear of the substation.
 Ups operation control system and method / 2484572
Uninterrupted power supply (UPS) (10) includes an AC output (63), a power coefficient correction power stage (12) and a DC bus (14) connected to the power coefficient correction power stage (12); the control system (18) Is designed so that to enable determination of difference in instantaneous power supplied to the AC output (63) and regulation of the DC bus voltage (14) based on at least such difference. In one implementation version the control system (18) is designed so that to enable determination of the total difference in instantaneous power supplied to the AC output (63).
 Electric power supply system / 2477557
Electric power supply system contains an autonomous power micro-plant (5) equipped with actuation and deactuation devices; the load (1) is connected to industrial electric mains via normally closed contacts of a switching contactor the control winding whereof is connected to the output terminals of the power micro- plant (5) via a matching device (4), the terminals joined to. Additionally connected, with contacts normally opened and sequentially in relation to the load, are current sensors (2) the output signal whereof is supplied to a dual-threshold comparison circuit (3), as well as a commutator (6) the control inputs whereof are connected to the industrial mains while the dual-threshold comparison circuit (3) output is connected to the power micro-plant actuation-deactuation device via the commutator (6).
 Alternative source energy control / 2475923
System includes an energy conversion system containing: a DC to AC energy converter; the first output configured for connection to the electric mains; the first input configured for connection to the electric mains; the second outputs, each of them configured for connection to the corresponding DC load; the line circuit breaker connected to the converter and to the first output; load interrupters connected to the converter, the second outputs and the first input; and a controller connected to the load interrupters and the first output and configured so that to determine whether the electric mains energy satisfies at least one criterion; the controller is additionally configured for control of the line circuit breaker and the load interrupters for the converter connection to the first output and the first input connection to the second outputs if at least one criterion is satisfied or, if otherwise, for control of the line circuit breaker and the load interrupters for the converter disconnection to the first output and the converter connection to at least one of the second outputs.
 Ac voltage converter / 2475922
Ensured in the proposed AC voltage converter is automatic power supply switching from accidentally de-energised mains to operational mains, ensuring improved reliability of power supply with highly stable AC voltage with the required frequency for critical consumers for whom power supply interruptions are unallowable or highly undesirable.
Device for uninterrupted automatic load transfer / 2503114
Device comprises two three-phase transformer-rectifier devices made in accordance with a multi-bridge rectification circuit (rectification bridges). The multi-bridge rectification circuit comprises a three-winding transformer with two secondary windings connected as "star" and "delta", which with their inlets are connected to two inlets of the main and reserve three-phase circuit continuously, a molecular energy accumulator, a three-phase inverter and three-phase thyristor switches, and thanks to thyristor switches, synchronisation is provided for three-phase inverters during connection (disconnection) of a faulty three-phase inverter from AC buses.
Safety device for backup power source at electrical signalbox / 2498477
Device contains accumulator battery divided into sections with safe voltage which is installed at the electrical signalbox; at the electrical signalbox there is multicontact component which operating contacts are switched on between sections of the accumulator battery, hand-operated disconnector and fire detectors connected to communication channel with alerting device installed at control panel of the station duty officer; at the control panel there is device for remote tripping control which normally closed output contact is connected in-series with normally closed output contact of hand-operated disconnector is switched on to the circuit feeding electric magnet of multicontact component.
 Standby method of frequency converters in system of electric actuators of circulating pumps of power facility / 2496209
Failure of one of electric actuators (1) and emergency shutdown of its frequency converter (4) is fixed, electric motor (7) of failed electric actuator is switched to electric power supply network through bypass switch (16), power is supplied to standby frequency converter (22) that is in cold standby, by switching switches (16) and (19) the electric motor (7) is switched to standby frequency converter (22), switched electric motor (7) is performed by standby frequency converter (22), and after operability of disconnected frequency converter (4) is restored, initial scheme of failed electric actuator (1) is restored and electric motor (7) is picked up by restored frequency converter (4).
 Method to control electric drives of coal preparation complex of blast furnaces / 2446539
In the method to control electric drives of a coal preparation complex of blast furnaces separate supply is arranged: power circuits are supplied from a device of automatic stand-by power connection, and control circuits - from a source of uninterrupted power supply, therefore electric drives circuits are not disassembled, and driving mechanisms remain in operation.
 Electric power supply system with uninterrupted power supply / 2438223
System includes starter-generator, relay governor, storage batteries, uninterrupted power supply unit, control unit, group of switches and relay of starter-generator. Uninterrupted power supply unit has direct and return electric connection to control unit. Control unit has return electric connection to tachometer, relay of starter-generator and relay governor. Outputs of relay governor have return electric connections to starter-generator and relay of starter-generator. Relay of starter-generator has direct electric connection to storage batteries and starter-generator and return electric connection to storage batteries.
 Power supply system and methods related to it / 2420824
System includes fuel cell (7) and slave capacitor (3). According to invention, system includes intermediate accumulator and power module (3). Module (3) is provided with power from fuel cell and supplies power to slave capacitor through electric power conversion module (31). Besides, invention refers to high-voltage platform (1) fed by means of invented system, to electric network fed by means of invented platform and to electric power supply method of equipment on high-voltage platform.
 System for continuous operation of elevator winch, elevator drive and method of continuous power supply to elevator winch motor / 2401792
Invention relates to electrical power systems and can be used in elevator supply systems for continuous operation under normal operating conditions and at supply faults. Proposed is electrical power system that can be used in elevator supply systems for continuous operation under normal operating conditions and at supply faults. Regenerative drive supplies power from the main power source to winch motor in normal operating conditions. Emergency supply system comprises standby power supply to disconnect regenerative power source in case it fails and connects standby power supply to regenerative drive of winch motor tor its continuous operation.
 Device for redundant power supply / 2394329
Proposed device for redundant supply of at least one load 14 comprises first power valve inverter 2 connected via first input 7 with first AC circuit 8, second power valve inverter 3 with its second output 11 connected to second AC circuit 12 and intermediate DC voltage link 4 that connects, on the side of constant voltage, first power valve inverter 2 with second power valve inverter 3 which allows redundant power supply. Said intermediate DC voltage link 4 comprises at least one load power supply output (14).
 Method of power supply to electric collectors maintaining continuous production process at industrial facilities / 2352046
Method of power supply to separate electric collector group involves power supply from additional autonomous mutually backed up power source positioned in direct vicinity from the group and, while power supply to the other electric collectors (including special electric collector group responsible for accident-free halt) not critical not reference parametre deviations is implemented by two autonomous mutually backed up external power sources. Autonomous power source is main source for separate electric collector group of continuous production process, its parametres are set with reliability probability and power value equal to ones of given electric collector group, and connection state between external and autonomous power sources is constantly monitored.
 Electric energy accumulation system based on accumulator batteries and supercapacitor with network enhancement function / 2512880
Invention relates to converting equipment and purposed for manufacturing of electric energy accumulation system operated in the network. The device contains accumulator batteries, fuses, bidirectional inverters, inverter control system, system for accumulation system control, contactor switch of accumulation system, contactor switch of AC network, AC network, self-sustained load, bank of supercapacitors, bidirectional inverter of supercapacitors, supercapacitors precharge module, bidirectional inverter of DC network, contactor switch of DC network, DC network, network quality control module, control system for active restoration of network quality, thyristor switch of balancing capacitors, bank of balancing capacitors.
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FIELD: electricity. SUBSTANCE: switched mode power supply unit contains a pulse-width modulator, a switching-type transistor for voltage converter, an accumulator battery, two analogue-to-digital converters, three comparator modules and three sources of threshold voltage, a frequency selection module of the pulse-width modulator, a module shaping a command to stop chargeor discharge of the accumulator, a current sensor, a normal open relay interconnected as specified in the application materials. EFFECT: expanding dynamic range of the device operation at increase in optimisation degree of operation modes for its components. 1 dwg
The invention relates to the field of electrical engineering and can be used in devices for backup or uninterruptible power supply a DC network, mainly from unstable power sources, the voltage of which may vary within wide limits. Known switching power supply ELN-60, manufactured by Mean Well containing a voltage Converter including a rectifier connected in series with a filter, a power key, an element isolation and the output rectifier filter whose output is the output device that is connected to the battery through the unit charge and the backup switch, the input of the Converter is connected to mains through the filter, the control input of the power key is connected to the output of pulse-width modulator to the first input of which is connected to the output of the block overload protection power key and the second input via opto-isolation is connected to the output of the detection module, connected to the output device (istochnik). In known switching power supply is provided to stabilize the output voltage, a smooth voltage rise at the start and the skip mode for the PWM at low load. However, the device is not sufficiently wide range of input voltages, and not the residual degree of optimization of the mode of operation of the elements of the device depending on the input voltage. The technical result of the invention consists in the expansion of the dynamic range of the device while increasing the degree of optimization of the modes of its elements. The technical result is achieved by the switching power supply that contains a unit pulse-width modulator, the output of which is connected with the control input of the switching transistors of the inverter, and the battery input and the inverter output voltage are respectively the input and output device according to the invention introduced two analog-to-digital Converter, three comparison module, a selection module frequency pulse-width modulator module and the formation of teams of termination of charge or discharge of the battery, while the inputs of the first and second analog-to-digital converters connected respectively to the input device and output device, the output of the first analog-to -digital Converter connected with the first inputs of the first and third modules comparison with the first input selection module frequency pulse-width modulator, the output of the second analog-to-digital Converter connected to the first input of the second comparison module, the second module input selection frequency pulse-width modulator with input "feedback stabilization voltage" block pulse them is osnago modulator and to the first input module of team formation on the termination of charge or discharge of the battery, the second inputs of the first, second and third modules of comparison is connected to the respective sources of the threshold voltage, and outputs the first and third modules of comparison is connected to the activation input of the unit pulse-width modulator, the output of the second comparison module connected to the input of the limitation of the duration of the" block pulse-width modulator, the output selection module frequency pulse-width modulator connected to the input "setting the operating frequency of the" block pulse-width modulator, the battery is connected to the output of one terminal through the current sensor, and the other terminal through the normally open relay contacts connected to the first output of the module team building on termination of charge or discharge of the battery to the second output of which is connected to the input "current regulation charge unit pulse-width modulator, the output of the current sensor is connected to the second input of module formation team on termination of charge or discharge of the battery. The voltage Converter includes a circuit connected to the input of the voltage Converter and consisting of series-connected inductor and the switching transistors, in parallel, through which the first capacitor is connected to the second inductor, the connection point of the second coil and is the production and the first capacitor through the diode connected to the second capacitor, connected with the output of the voltage Converter. The drawing shows a diagram of the pulsed power source. Switching power supply contains block 1 pulse-width modulator, the output of which is connected with the control input of the switching transistors of the Converter 2 voltage, and the battery 3, the input and output of the Converter 2 voltage are respectively the input and output devices, the inputs of the first and second analog-to-digital converters 4, 5 are connected respectively to the input device and output device, the output of the first analog-to-digital Converter 4 is connected with the first inputs of the first and third modules 6, 8 and comparison with the first input module 9 selection of the frequency pulse-width modulator, the output of the second analog-to-digital Converter 5 is connected to the first input of the second module 7 comparison with the second input of the frequency selection module 9 selection of the frequency pulse-width modulator with input "feedback stabilization voltage" unit 1 pulse-width modulator and to the first input module 10 forming teams of termination of charge or discharge of the battery, the second inputs of the first, second and third modules of comparison is connected to the respective sources of the threshold voltage, and outputs the first and third modules 6, 8 comparison connected with in the Odom off block 1 pulse-width modulator, the output of the second module 7 comparison connected to the input limitation of duration of block 1 pulse-width modulator, the output module 9 selection of the frequency pulse-width modulator connected to the input "setting the working frequency block 1 pulse-width modulator, the battery 3 is connected to the output of one terminal through the current sensor 11, and the other terminal through the normally open contacts 12 relay 13, connected to the first output module 10 forming teams of termination of charge or discharge of the battery to the second output of which is connected to the input "current regulation charge block 1 PWM the output of the current sensor 11 is connected to the second input module 10 forming teams of termination of charge or discharge of the battery. The voltage Converter 2 includes a circuit connected to the input of the voltage Converter and consisting of series-connected coils 14 of the inductance and the switching transistors 15, in parallel, through which the first capacitor 16 is connected to the second coil inductance 17, the connection point of the second coil 17 of the inductor and the first capacitor 16 through the diode 18 is connected to the second capacitor 19 connected to the output of the voltage Converter. Switching power supply works as follows. Tension is a group of applied to the input device, using a first analog-to-digital Converter 4 is converted into a digital form and is then compared with established thresholds (Uporand Uporin the first and third modules 6, 8 comparisons. The voltage on the output device using the second analog-to-digital Converter 5 is converted into a digital form and compared with the established threshold (Uporin the second module 7 comparison. Simultaneously the output signal from the second analog-to-digital Converter 5 is supplied to the first input module 10 forming teams of termination of charge or discharge of the battery. If the voltage level at the input of the device below the threshold value Upor(too low for normal operation of the device), then the output of the first module 6 comparing a signal is generated which is fed to the input of the off block 1 pulse-width modulator and prohibits operation of the device. After turning off the unit 1 PWM output voltage of the device decreases rapidly, thereby causing actuation module 10 forming teams of termination of charge or discharge of the battery, which includes the relay 13, which closes the contacts 12, through which the battery 3 is connected to the output device. A similar process occurs if the level of the input voltage previse the threshold value U pori.e. is above the upper tolerable limit. Then the output of the third module 8 comparison, a signal is generated which is fed to the input of the off block 1 pulse-width modulator and prohibits operation of the device, resulting in reduction of the output voltage and connecting the battery to the output device. If the input voltage is within the operating range of the device (Upor< Uslave< Upor), in this case, the output module 9 selection of the frequency PWM input "setting the working frequency block 1 pulse-width modulator receives the control signal that sets the optimal frequency pulse-width modulator. The optimal frequency PWM with fixed parameters choke is determined by the level of the input voltage. It can be calculated according to the methods for switching power supplies, refer to the technical literature. At higher voltage frequency pulse-width modulator should be higher, otherwise there is a danger of occurrence of chokes in the saturation mode. The optimal choice of frequency for each level of the input voltage, in turn, allows the best way to choose the parameters chokes to reduce the number of turns in their windings will increase the overall efficiency of the device and/or to expand the range of input voltages. The duty cycle of the signal at the output of block 1 PWM received at the control input of the switching transistors 15 of the Converter 2 voltage is changed in such a way as to maintain the input "feedback stabilization voltage" unit 1 PWM stable digitized voltage value. In case of increasing load on the output device the duration of the active signal level pulse width modulator increases, but only up to a certain limit. If this limit pulse duration pulse-width modulator insufficient to maintain the nominal voltage at the output device, the output voltage starts to drop. If the level of the output voltage decreases below a threshold Upor,the entry restriction duration" block 1 PWM output of the second module 7 comparison enters the overload alarm device output. This leads to a stronger restriction on the maximum duration in unit 1, a pulse-width modulator, which entails a further reduction of the output voltage, etc. For a short time duration of the pulses at the output of block 1 is reduced to very small values, which can not damage the circuit elements even UD short circuit on the output device. Upon removal of the overload or short circuit on the output device, the output voltage begins to rise. A signal that carries information about the increase of the voltage through the analog-to-digital Converter 5 is fed to the input "feedback stabilization voltage" unit 1 pulse-width modulator. As voltage is reduced restriction in the block 1 on the maximum duration of the signal pulse-width modulator, which in turn allows you to continue the growth of the voltage at the output device, which further weakens the restriction on the duration and so the Process stops when the output voltage reaches the nominal value, and begins to work feedback through input "feedback stabilization voltage" unit 1 supporting the output voltage at a nominal level. The current sensor 11 and the module 10 forming teams of termination of charge or discharge the battery to provide the desired (normal) operation of the battery in the discharge or charge. When an external power supply and while the device is charging the battery 3. Charging the battery 3 is in two stages. In the first stage, the battery 3 is charged by a constant current. For this purpose the nominal output voltage of the device decreases (through modules 5 and 10) so clicks the zoom, to ensure the battery is almost constant current. Upon reaching the battery voltage of the order of 14.3 In the transition occurs in a buffer battery mode of operation. In this mode, the device sets the nominal voltage of 13.5-13.8 V, which is supplied to the battery and maintains it in working condition (battery mode)Mode. If the input voltage is not present, the load is supplied by the battery through the contacts 12 of relay 13. The discharge current is controlled by current sensor 11. If the voltage level at the output of the device drops below 10.5 volts, then the module 10 forming teams of termination of charge or discharge of the battery through the relay 13 disconnects the battery from the output device to turn on external power or to change the battery charged. Thus, the proposed device provides soft start, overload protection on input and output, the output voltage stabilization and implements the functions of the charger with overload protection and over-discharge of the battery. 1. Switching power supply that contains a unit pulse-width modulator, the output of which is connected with the control input of the switching transistors of the inverter and the battery, the input and output conversions the user voltage are respectively the input and output device, characterized in that it introduced two analog-to-digital Converter, three comparison module, a selection module frequency pulse-width modulator module and the formation of teams of termination of charge or discharge of the battery, while the inputs of the first and second analog-to-digital converters connected respectively to the input device and output device, the output of the first analog-to-digital Converter connected with the first inputs of the first and third modules comparison with the first input selection module frequency pulse-width modulator, the output of the second analog-to-digital Converter connected to the first input of the second comparison module, the second input module selection of the frequency pulse-width modulator with input "feedback stabilization voltage" block pulse-width modulator and to the first input module of team formation on the termination of charge or discharge of the battery, the second inputs of the first, second and third modules of comparison is connected to the respective sources of the threshold voltage, and outputs the first and third modules of comparison is connected to the activation input of the unit pulse-width modulator, the output of the second comparison module connected to the input of the limitation of the duration of the" block pulse-width modulator, the output selection module frequency pulse to pulse is snogo modulator connected to the input "setting the operating frequency of the" block pulse-width modulator, the battery is connected to the output of one terminal through the current sensor, and the other terminal through the normally open relay contacts connected to the first output module forming teams of termination of charge or discharge of the battery to the second output of which is connected to the input "current regulation charge unit pulse-width modulator, the output of the current sensor is connected to the second input of module formation team on termination of charge or discharge of the battery. 2. Switching power supply according to claim 1, characterized in that the voltage Converter includes a circuit connected to the input of the voltage Converter and consisting of series-connected inductor and the switching transistors, in parallel, through which the first capacitor is connected to the second inductor, the connection point of the second inductor and the first capacitor through the diode connected to the second capacitor, connected to the Converter output voltage.
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