Redundant direct current stabiliser
SUBSTANCE: invention refers to electric engineering and can be applied in spacecrafts for current limitation in electric power supply system of solar battery panel opening for a drive opened to the limits. Redundant DC stabiliser includes control element (CE) connected in series with current sensor and load and based on four n-channel MIS transistors connected in parallel and in series, negative CE output connected via current sensor to common power supply bus and positive output connected via load to positive power supply bus; four identical control circuits (CC) of CE MIS transistors are added; each CC output is connected to gate of separate MIS transistor of CE; negative power supply output of each CC is connected to common power supply bus and positive output is connected to positive power supply bus; gauge input of each CC is connected to the point of CE connection with current sensor; each CC includes input non-inverting amplifier with its input connected to CC gauge input and output connected to inverting input of output amplifier (OA), output of which is connected to CC output; reference voltage source with its output connected to non-inverting input of OA; power supply pulse generator with its output connected to inverting OA input.
EFFECT: improved reliability of DC stabiliser.
The invention relates to electrical engineering and can be used in space vehicles to limit the current in the power supply system of the actuator disclosure solar panels when opening the drive until it stops.
Known current regulator containing a source of reference voltage, the first and second transistors of one conductivity type, the emitters of which are connected respectively with the first findings of the first and second resistors, a collector connected to the output terminals, the third and fourth transistors of this type conductivity as the first and the second, fifth and sixth transistors of the opposite type conductivity, the third resistor, the emitters of the third and fourth transistors integrated and connected to the first pole of the source of the reference voltage, the collectors of the second and conclusions, respectively, first and second resistors, a base connected respectively to the bases of the fifth and sixth transistors, the emitters of which the United and through the third resistor is connected to the second pole of the source of the reference voltage and the collectors to the bases respectively of the first and second transistors (SU 1460715).
However, this device is not reliable enough, since the failure of the transition base-collector of any transistor device fails, in addition, a stabilized current can not exceed the gas current of the transistor 2 (1); the device requires galvanically isolated secondary power supply 7, which increases its size and reduces reliability.
Closest to the proposed to the technical essence is the stabilizer DC, containing included in a potential tire relative to a common bus connected in series regulating transistor element and the sensor load current, differential DC amplifier, the inverting input of which is connected to the current sensor, the non-inverting input is connected to the positive output of the voltage reference and the output is connected to a control input of the regulating element, while the negative output of the voltage reference is connected to the potential output output stabilizer, auxiliary reference voltage source, the negative output of which is connected to the output potential of the regulator, resistor voltage divider connected between the positive output auxiliary source reference voltage and a common bus, the transistor protection, the collector of which is connected to the control input of the regulating element, the emitter is connected to the output of the regulating element and the base circuit is connected to the center pin of resistor voltage divider, and capacitive delay circuit, connected to BA the new circuit of the transistor protection (SU 1385126), selected as a prototype.
The disadvantages of the prototype are (see the drawing to the invention SU 1385126): a large voltage drop across the current sensor 2, is equal to a reference voltage source 4, which reduces the voltage at the load and the allocation of power to the current sensor; insufficient reliability due to two factors: firstly, the presence of additional secondary power supply with galvanic isolation from UBXthat, as a rule, have the control scheme key elements of a transformer, rectifier diodes, smoothing LC-filters, i.e. contain many elements, which reduces reliability; secondly, failure to break the regulating element 1 load remains without power, and in case of failure of the regulatory element of type "short circuit" to the load served increased current and it can be out of order, to return the circuit to its original state after overloading for a short time off, and then re-enable the stabilizer, which means we need an additional device or operator.
The aim of the invention is to improve the reliability.
This objective is achieved in that the redundant regulator constant current regulating element (re) 1, connected in series with the current sensor and the load, performed on four n-the anal MOS transistors, connected in parallel-series, the negative output OM 1 through the current sensor 2 is connected to the common power bus and positive through the load 3 to the positive power bus; put four identical control circuit (SU) 4-7 MOS transistors ER 1; the output of each SU is connected to the gate of the individual MOS transistor ER 1; the negative output power of each SU is connected to the common power bus and positive to the positive power bus; a measuring input of each SU is connected to the connection point re 1 current sensor 2; each SU contains: non-inverting input of the amplifier 8, whose input is connected to the measuring input of the SU, and the output to the inverting input of the output amplifier (WU) 9, the output of which is connected to the output of the SU; the reference voltage (ION) 10, the output of which is connected to reinvestiruet entrance WU 9; shaper pulse power (PHI) 11, the output of which is connected to the inverting input VU 9.
The figure shows a functional diagram of the redundant stabilizer DC.
Redundant stabilizer DC contains: ER 1, performed on four n-channel MOS transistors connected in parallel-series, the negative output ER through the current sensor 2 is connected to the common power bus and positive through the load 3 to the positive power bus; four Odie is W hat management scheme (SU) 4-7 MOS transistors ER 1; the output of each SU is connected to the gate of the individual MOS transistor ER 1; the negative output power of each SU is connected to the common power bus and positive to the positive power bus; a measuring input of each SU is connected to the connection point re 1 current sensor 2; each SU contains: input non-inverting amplifier, whose input is connected to the measuring input of the SU, and the output to the inverting input of the output amplifier (WU) 9, the output of which is connected to the output of the SU; reference voltage source 10, the output of which is connected to nevertrust entrance WU 9; a pulse shaper for the power supply 11, the output of which is connected to the inverting input VU 9.
The device operates as follows: when power is supplied to the driver 11 generates a short pulse of low level to the inverting input WOO 9 and the outputs of all SU appears the high-level voltage and re 1 is fully open, providing load 3 (electrical) required starting current.
When the load current is less than the current stabilization (restrictions):
where ICT-current stabilization of the mouth of the STS;
UOP- voltage of the reference voltage;
R2 is the resistance of the sensor current;
K8 - gain amplifier 8.
The output voltages of all the SU will have a high level because the voltage on the inverting input WOO 9 is less than the reference voltage; decreasing the resistance of the load, the current through it does not exceed the value of ICT(see (1)) due to the reduction of the output voltages of all the SU, because the voltage at the output of the amplifier 8 starts at a small value to exceed the reference voltage, and output voltage VU 9 decreases and MOSFET transistors in re 1 key mode is transitioned to the active mode, i.e. begin to stabilize the voltage U2the current sensor 2, is equal to:
In the proposed device is eliminated a large voltage drop on the current sensor 2, which can be made arbitrarily small by increasing K8, see expression (2). The reliability of the device is improved by eliminating galvanically isolated secondary power source and application redundancy, including sensor t is ka, which is made for the parallel connection of several resistors(resistors depends on the required accuracy of the current stabilization) and, thus, failure of any element does not cause malfunction of the device.
It was made 20 devices, they differed a good repeatability, high accuracy current stabilization. The devices are assembled on the elements: P B2, URS, ART, C2-33, C2-29 C.
From the known to the applicant of patent information materials are not signs of a similar set of features of the claimed object.
Redundant stabilizer DC containing the regulatory element (re), connected in series with the current sensor and the load, characterized in that ER performed on four n-channel MOS transistors connected in parallel-series, the negative output ER through the current sensor is connected to the common power bus and positive through the load to the positive power bus; put four identical control circuit (SU) MOS transistors ER; the output of each SU is connected to the gate of the individual MOS transistor ER; the negative output power of each SU is connected to the common power bus, and a positive - to the positive power bus; a measuring input of each SU is connected to the connection point of the ER with the current sensor; each SU contains: I the ne non-inverting amplifier, an input connected to the measuring input of the SU, and the output to the inverting input of the output amplifier (WU), the output of which is connected to the output of the SU; the source of the reference voltage, the output of which is connected to reinvestiruet entrance WU; a pulse shaper according to the power supply, the output of which is connected to the inverting input of WU.
SUBSTANCE: invention is related to a capacitive power supply unit, moreover to an electronic device equipped with the capacitive power supply unit. To this end at the first facility the capacitive power supply unit contains an input part (10) having input contacts (Ln, Nt) to connect an alternating-current source and a capacitive coupling; a rectifying part (20) connected through the capacitive coupling to the input contacts (Ln, Nt) and an output part (30) connected to the rectifying part, there's an auxiliary device (R1) limiting start-up current where output contacts (V+, V-) are connected to the respective contacts of a device (D5) limiting output voltage, and in-series capacitive impedance (Zdc) conducting direct current has a resistive component with a resistive value equal to at least 0.2 of the first circuit resistive value. At the second facility the electronic device contains a power input (101), (102) for connection to the supply mains; a capacitive power supply unit (110) coupled to the power input; the first functional unit (140) receiving power supply from the capacitive power supply unit.
EFFECT: reduction of heat dispersion losses.
6 cl, 5 dwg
SUBSTANCE: device contains five transistors, two resistors and current source coupled between the power supply bus and output terminal, bases of the first and second transistors are connected to collectors of the first and fifth transistors, the first resistor is coupled between the common bus and emitter of the second transistor, the second transistor is coupled between the output terminal and connected emitters of the fourth and fifth transistors, emitters of the first and third transistors are coupled to the common bus, bases of the third, fourth and fifth transistors are joined with collectors of the first and fourth transistors, a collector of the third transistor is connected to the output terminal.
EFFECT: obtainment of thermally stable output voltage at values closed to double energy gap width.
FIELD: physics, optics.
SUBSTANCE: invention relates to a device for driving a light-emitting diode (LED), an apparatus having said device and a method of driving a LED. In the first object, the disclosed device comprises an output stage for feeding current to the LED, wherein the current has an average value and a peak value, wherein the peak value, divided by the average value, forms a ratio, and an input stage for receiving a signal from a power supply unit, wherein the input stage includes a tool, having a resonance circuit for reducing the ratio through a frequency component to the signal or adaptation of the frequency component of the signal, which improves efficiency of the LED. According to the second object, in the method on the output stage, current is fed to the LED, wherein the current has an average value and a peak value, wherein the peak value, divided by the average value, forms a ratio, and an input stage for receiving a signal from a power supply unit, wherein the input stage includes a tool, having a resonance circuit for reducing the ratio by adding a frequency component to the signal or adaptation of the amplitude of the frequency component of the signal, which improves efficiency of the LED.
EFFECT: designing a device for driving a LED with high efficiency.
13 cl, 4 dwg
SUBSTANCE: device contains the first and second transistors which bases are united and connected to the device output, the first resistor, an emitter of the first resistor, a common bus, the second resistor, an emitter of the second resistor, the first output of the second resistor, the third resistor, the second output of the second resistor, a current repeater, the third transistor, a collector of the second resistor, a connection point of the first transistor collector, a base of the third transistor, a feed input of the current repeater, a power bus, a collector of the third transistor.
EFFECT: simplification of scheme with high temperature stability of output voltage.
SUBSTANCE: invention is attributed to the field of electric engineering and can be used for manufacturing of power supply facilities. Device contains direct voltage source, converter of direct voltage to pulse voltage connected by its inputs to outputs of direct voltage source, converter of pulse voltage to direct voltage connected by its inputs to outputs of converter of direct voltage to pulse voltage connected by its output to the first control input of converter of direct voltage to pulse voltage, direct current stabiliser connected by its first input to output of converter of pulse voltage to direct voltage and by its second input to positive output of direct voltage source, by its first output to one of load outputs and by its other output to negative output of direct voltage source; device contains control circuit connected to its first input to output of converter of pulse voltage to direct voltage by its second input to the second output of direct current stabiliser, by its first output to the second (negative) output of direct voltage source, and by its second output to the second control input of converter of pulse voltage to direct voltage.
EFFECT: stabilisation of dissipation power in direct current stabiliser at change of load resistance.
SUBSTANCE: voltage Uout is measured at the outlet of the stabiliser, as well as inlet voltage Uin, currents of the throttle IL, and load l, these signals are selected in each period of conversion at certain moments of time h; the signal "capacitor current" is calculated, its dynamic component is extrapolated, and to ensure static accuracy of output voltage of the pulse voltage stabiliser, they generate a mismatch signal by voltage, and its digital summation is carried out with accumulation (they perform digital integration); the signal "capacitor current" after frequency correction and in the sum with the integrated signal of mismatch is sent to the inlet of the width-pulse modulator.
EFFECT: increased quality of outlet voltage of pulse voltage stabiliser PV under dynamic and static modes of operation during discrete processing of its information signals.
SUBSTANCE: pulsed dc voltage controller comprises series-connected first diode, controlled switch, filter inductance and load, two zero-diodes and filter capacitors, a microcontroller, a control driver, a feedback circuit and a manual control panel, a synchronisation unit, two inputs of which are connected to second unlike terminals of first diodes, and two outputs are respectively connected to inputs of the control driver and the microcontroller. The filter inductances are made on a common magnetic conductor and are magnetically coupled. The pulsed controller includes two additional capacitors and two second diodes. Each of the filter inductances is made with an additional lead. The leads of the additional capacitors are connected to additional leads of the filter inductances and the common terminal of the alternating current primary supply, respectively, and leads of the second diodes are connected to the additional and output leads of corresponding filter inductances.
EFFECT: enabling use to power self-contained inverters, cathodic protection stations, micro-arc oxidation apparatus and for powering various other electrical equipment.
2 cl, 2 dwg
SUBSTANCE: invention suggests a current control system that contains at least one longitudinal branch with longitudinal linear controller (1, 11; 12) in order to shape a signal (u, u1, u2) controlling the impact; at that the longitudinal controller (1, 11, 12) is connected to semiconductive actuating element (2, 21, 22) connected to supply voltage (Uin) and referred to earthing and to which output voltage (Uout) is applied at the output side. At that reference signal is supplied to the longitudinal controller (1, 11, 12) while current-measuring signal and regulating signal (u, u1, u2) are referred to earthing. The regulating signal (u, u1, u2) is sent to the difference shaper (5, 51, 52) which subtracts difference of supply voltage (Uin) and output voltage (Uout, U1out, U2out) from the regulating signal (u, u1, u2). At that the shaped output signal from the difference shaper (5, 51, 52) is sent to semiconductive actuating element (2, 21, 22) as a corrected regulating signal (u', u'1, u'2).
EFFECT: improving reliability and accuracy of current control system.
10 cl, 3 dwg
SUBSTANCE: invention suggests secondary power supply which consists of a switching element; primary wiring of a transformer which first lead is connected to the first output of power supply source and the second lead is connected through primary circuit of a current sensor to the first output of the switching element; input of the latter through pulse generator and threshold device connected in-series is connected to the first output of output circuit of an error signal shaper and its second output is connected to summator output; the first input of the summator is connected to secondary circuit of the current sensor, the second input of the summator is connected to reference-supply source, outputs of input circuit of the error signal shaper are connected to the first secondary wiring of the transformer while its second wiring is connected to the load; service power supply unit with its first and second inputs connected to the first and second outputs of the primary power supply; positive and negative supply busses of reference-supply source, pulse generator and threshold device are connected to the output of the service power supply unit and the second output of the primary power supply source respectively; and the switching element consists of two bipolar transistors.
EFFECT: enlarging the upper range of input operating voltage for secondary power supply source.
FIELD: electrical engineering.
SUBSTANCE: device contains five transistors, three resistors and a current source which is placed between the power supply bus and the output terminal; the first and the second resistors, via their first outputs, are connected to the output terminal; the bases of the first and the second transistors are connected to the collectors of the first and the fifth transistors; the third resistor is placed between the common bus and the second transistor emitter; the emitters of the first and the third transistors are connected to the common bus; the collector of the third transistor is connected to the output terminal; the bases of the third, the fourth and the fifth transistors are connected to the collectors of the second and the fourth transistors; the emitter of the fourth transistor is connected second output of the second resistor; the emitter of the fifth transistor is connected to the second output of the first resistor.
EFFECT: obtainment of thermally stable output voltage at values closed to doubled energy gad width.
FIELD: voltage regulation circuits used in manufacture of chip-carrying card integrated circuits.
SUBSTANCE: proposed circuit has series regulator L with field-effect transistor M1. Series-connected between source lead placed at higher potential VDDext and gate lead M1 are capacitor C1 and second field-effect transistor that functions as transmitting gate TG1 controlled by power/reset signal POR. Applying external supply voltage VDDext with series-connected transmitting gate TG1 drives in conduction field-effect transistor M1 in compliance with charge of capacitor C1 that takes place in the process. As this charge takes certain time, overshoot of internal voltage VDDint can be avoided.
EFFECT: reduced degree of overshoot when driving transistor in conduction.
3 cl, 5 dwg
FIELD: electric engineering.
SUBSTANCE: support voltage source has first and second amplifiers 5, 6, two power sources 7, 8 of opposite polarity, first and second resistors 1, 2, connected serially and connected between common point 7, 8 and inverse input 5, connected to output 6, and serially connected third and fourth resistors 3, 4, which are connected to middle point of resistors 1, 2 and to output of amplifier 5, inverse amplifier input 6 is connected to middle point of resistors 3, 4, while non-inverse inputs of amplifier 5, 6 are connected by common point 7, 8. as first and fourth resistors a non-linear element is connected, having volt-ampere characteristics of voltage stabilizer. As resistor 2 or 3 non-linear element is connected, having volt-ampere characteristics of current stabilizer.
EFFECT: simplified construction.
2 cl, 4 dwg
FIELD: power units designed to ensure spark safety of loads.
SUBSTANCE: proposed device 200 designed to supply with power spark-proof load provided with feedback circuit of integrated current supply and current limiting component and also to minimize voltage that should be limited in compliance with sparking safety standards has power supply PS and output terminals T1-T2 for connecting device to spark-proof load. Voltage limiting unit Z1 inserted between power supply PS and output terminals T1-T2 is used to limit voltage across load leads. Current limiting unit 202 has barrier resistors designed for current-to-voltage conversion to provide for comparison by operational amplifier that controls variable impedance Q1 and limits current supply to load.
EFFECT: reduced manufacturing cost, improved sparking safety.
19 cl, 3 dwg
FIELD: electric engineering.
SUBSTANCE: for controlling constant voltage pulse stabilizer current value of stabilized voltage is measured, measured value is compared with constant support voltage, on basis of discordance signal by means of synchronization voltage of saw-like shape broad-pulse modulated signal is formed, used for controlling adjusting stabilizer element. Also, this signal is demodulated and received correction signal is added to discordance signal. When selecting correction signal transfer coefficient, static error value of voltage stabilization is corrected. It is possible to ensure equality of static error to zero by selecting transfer coefficient appropriately. Current control method is effective for different variants of direct voltage converters (of increasing, decreasing and inverting types) and different modes of their operation (as with continuous, as with discontinuous stabilizer throttle currents).
EFFECT: lesser static error of voltage stabilization in case of external interference (change of inlet voltage or load resistance, influence of non-ideal elements of stabilizer power circuit).
FIELD: electric engineering.
SUBSTANCE: device has compound adjusting element 1, force transistor 2, synchronization transistor 3, discordance signal amplifier 4, resistor 5, protective transistor 6. when main power fails, protective transistor opens to lift voltage from collector of transistor 3 and amplifier 4. this provides protection for transistor 3 from overload and increases reliability of stabilizer operation.
EFFECT: higher reliability, higher efficiency.
FIELD: electric engineering.
SUBSTANCE: device has adjusting element 2, input of which is connected to input 1 of voltage transformer, and output - to first output of voltage transformer, block 3 for controlling protection, output of which is connected to control input of adjusting element 2, overload detector 6, connected to common bus and input of which is connected to second output of voltage transformer. Also provided are repeated enabling delay block 4 and overload duration determining block 5.
EFFECT: higher efficiency, broader functional capabilities.
FIELD: electric engineering.
SUBSTANCE: device has broadband pulse modulator, power amplifier, field transistor, service electric power source, special pulse generator, overload protection device, voltage stabilizer, voltage check connection device, also provided is overload protection device with first optic couple and differential amplifier, check connection device is made on two differential amplifiers and second optic couple, LC-filter, four resistive dividers.
EFFECT: higher reliability, lower costs, higher quality.
FIELD: converter and pulse engineering; feeding pulse-power loads.
SUBSTANCE: proposed converter designed to convert dc to pulse energy has power buses 1 with forward diodes 2, 3, regulating transistor 4 with control unit 5 in base circuit, output transformer 6 with two sections 7, 8 of input winding, first and second capacitors 9, 10 connected to starting lead of winding section 7 and to finishing lead of section 8, second leads of capacitors 9 and 10 being connected to emitter and collector of transistor 4, respectively. Novelty is that finishing lead of first section 7 is connected to collector and starting lead of second section 8, to emitter of regulating transistor 4 through cumulative magnetically coupled windings 11, 12 of choke 13, and diodes 2, 3 of power buses are connected to common point of input winding section and choke winding 13 cumulatively with transistor 4. Power buses are shorted out by additional diode 14.
EFFECT: reduced switching losses.
2 cl, 2 dwg
FIELD: electronics and automatic control; power converter engineering.
SUBSTANCE: proposed method for stepless regulation of ac voltage and its phase variation includes conversion of sine-wave voltage by means of inverter into sequence of amplitude- and length-modulated bipolar pulses of much higher frequency followed by their rectification to produce sine-wave voltage of original frequency across output of ripple filter. Its amplitude is proportional to relative pulse length and phase reversal occurs in response to variation in operating phase of synchronous rectifier switches.
EFFECT: reduced size and ability of varying output voltage phase.
1 cl, 2 dwg
FIELD: the invention refers to the sources of electric supply of electron aids whose functioning is carried out on the principles of electronic engineering and/or radio technique.
SUBSTANCE: the aids include at least one active element with three or more electrodes particularly a transistor and using this active element(elements) carry out amplification, conversion or generation (formation) of working electric signals of alternating or direct voltage including broadband signals. The mode and the arrangement for electric supply of predominantly portable electron aids is carried out by way of using at least one a three-electrode active element, amplification, conversion or generation of an electric signal of alternating or direct voltage based on supplying voltage on the clamps of the electron aid, impulse voltage whose on-off time ratio is within the limits of 1,1-20,0 is used as supply voltage. In the second variant of the mode and of the arrangement the impulse voltage has the following parameters: the frequency of impulses is at least one level higher than the maximum frequency of the spectrum of the electric signal of alternating voltage or at least one level less than the minimal frequency of the spectrum of this electric signal, and the duration of the impulse fronts is at least one level less than the magnitude inverse to the maximum frequency of the spectrum of the electric signal of alternative voltage.
EFFECT: decreases electric consumption.
10 cl, 3 dwg