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Onboard charging device. RU patent 2518914.

Onboard charging device. RU patent 2518914.
IPC classes for russian patent Onboard charging device. RU patent 2518914. (RU 2518914):

H02J7/10 - using semiconductor devices only
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FIELD: electricity.

SUBSTANCE: method is implemented with introduction of an active mains filter 22 and two groups of the secondary windings at transformer-rectifying cascade 7 into the construction of the third relay 21.

EFFECT: expansion of functionality due to its use both for charging of the traction battery and for supply of the twelve-volt electric equipment of electromobile and charging of the automobile accumulator battery, improvement of power indicators due to electric energy consumption from the mains with a power factor close to 1.

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The invention relates to the electrical engineering and may be used in the development of high frequency battery chargers and power supply galvanic isolation of output voltage.

A device, RF patent №2127200, CL B60L 15/08, H02J 7/10, 1999, in which for charging the traction batteries of electric power Converter is used electric drive and power factor close to unit.

A disadvantage of this device is the absence of protection from sudden switching power supply, and lack block, carrying food of dvenadtsatikolonnom electric equipment of electric vehicle (lights, wipers, etc.) and the charging of automobile (12 V) battery.

It is also known device, RF patent №2222098, CL B60L 11/12, H02P 7/62, 2002, in which for charging the traction batteries and electric charge car (12 In) battery pack uses a single transistor inverter.

The disadvantages of this device are the lack of protection from sudden switching power supply voltage and low power parameters caused by the use of single-transistor Converter that provides charging of accumulator batteries with a very high voltage difference: the traction batteries 300...400 volts, and automotive batteries 14 volts.

The closest technical solution is device, RF patent №2101830, CL H02J 7/10, H02M 7/12, 1998, (prototype), which for charging the traction battery electric vehicle uses high-frequency half-transistor Converter with galvanic isolation of output voltage.

A disadvantage of this device is the absence of a possibility to exercise the power of dvenadtsatikolonnom electric equipment of electric vehicle (lights, wipers, etc.) and the charging of automobile (12 In) battery while driving electric vehicle, i.e. it must route just as "ballast". In addition, this device provides the energy consumption of network power factor close to unit.

The aim of the invention is to increase energy performance and expansion of functional properties.

This goal is achieved in the device contains a power supply for own needs, half-transistor Converter, an input through a limiting resistor is connected to a power source, containing a single-phase bridge rectifier, and exit through the first current sensor is connected to the primary winding of a transformer-rectifier cascade input filter traction batteries, the first and second power to control half-bridge MOSFET transistor inverter, voltage regulator, comparator, RS-trigger and trigger with counter input, the first and the second relay, the first conclusions coils are combined and connected to plusobama the conclusion of the internal power supply of the second amplifier, with the second conclusion of the first coil of the relay is connected to the center pin internal power supply of the second amplifier through normally closed contact of the second relay, normally open contacts of which bypasses the current-limiting resistor, and the second conclusion of the second coil of the relay is connected to the sensor output voltage of the power supply, the input of which is connected to the input of half-transistor Converter, the first and second logical elements 4OR-NOT the outputs are connected to the inputs respectively the first and second power amplifiers, with the input logic elements 4OR IS NOT connected through normally closed contact first relay to the center pin internal power supply of the second amplifier, and through the normally open contact of the same relay to the positive terminal of the power source, second input logic elements 4OR IS NOT connected to the direct output RS-trigger, third inputs to R-input RS-trigger and counting the input of the second trigger, direct the output of which connected to the fourth sign of the first logical element 4OR IS NOT, and inverted output this trigger connected to the fourth sign of the second logical element 4OR-NO, with the release of the first current sensor half-transistor inverter via connected to the comparator's input RS-trigger. This goal is achieved by the fact that in the power supply entered the third relay winding of which is connected to the input of a single-phase bridge rectifier, and network active filter, educated connected in a choke, and diode, the cathode of which is connected to the positive terminal half-bridge transistor inverter and the anode to the first terminal throttle and collector power transistor, the emitter of which is connected to negative terminal of single-phase bridge rectifier and with the first output current-limiting resistor, the second output of which is connected to the negative terminal half-transistor Converter, while the second terminal of the throttle through the second current sensor is connected to the positive terminal single-phase bridge rectifier, and the positive terminal of the input filter traction batteries through normally closed contact power relay is connected to the positive terminal half-transistor Converter, with transformer-rectifier stage is executed with two groups of secondary windings, the first of which through rectifier diodes and normally closed contacts power relay is connected to the input filter onboard dvenadtsatiperstnoi the battery, and the second group through rectifier diodes and normally open contacts of power relay is connected to the input filter traction batteries, and its negative conclusion through normally closed contact power relay is connected to the emitter of the power transistor, the basic conclusion through the third amplifier and relay element with hysteresis characteristic connected to the output of summary element to the inverting input of which comes output signal of the second sensor current, and not inverting input of the adder goes specifying the desired signal current through the inductor network of active filter that on the form strictly repeats output voltage single-phase bridge rectifier power supply, where the traction batteries and the onboard dvenadtsatiperstnoi the battery is connected respectively the first and second PWMvoltage regulators with OPTRON output, the first of which over normally open block-contact power relays connected to any third inputs of the first and second logical elements 4OR IS NOT, and the second PWM voltage regulator connected to these inputs through normally closed block-contact power relays, and power supply for own needs is connected to the onboard dvenadtsatiperstnoi battery.

The drawing shows a diagram of the device.

On-Board charger, containing the power supply 1 own needs, half-transistor inverter 2, entrance through which current-limiting resistor 3 is connected to power supply 4 containing a single-phase bridge rectifier 5, and exit through the first 6 axis current is connected to the primary winding of a transformer-rectifier cascade 7, input filter 8 traction batteries 9, the first 10 and 11 second amplifiers to control half-bridge MOSFET transistor inverter 2, voltage regulator 12, 13 comparator, RS-the 14 trigger and trigger 15 with a counter input, the first 16 and 17 second relay, the first conclusions coils are combined and connected to plusobama the conclusion of the internal power supply of the second amplifier 11 power, while the second conclusion coil C first 16 relay is connected to the center pin internal power supply of the second amplifier 11 power through normally closed contact 17.2 second relay 17, normally open contacts of which bypasses the current-limiting resistor 3, and the second output of the coil C second relay 17 is connected to the output of the sensor 18 voltage supply 4, entrance which is connected to the input of the half-transistor inverter 2, 19 and 20 second logical elements 4OR-NOT the outputs are connected to the inputs, respectively, of the first 10 and 11 second power amplifiers, with the input logic elements 19, 20 4OR IS NOT connected through normally closed contact 16.2 first relay 16 to the center pin internal power supply of the second amplifier 11, and through the normally open contact of the same relay 16 - to the positive terminal of the power source, second input logic elements 19, 20 4OR IS NOT connected to direct output RS-flip-flop 14, third inputs to R-input RS-flip-flop 14 and counting the input of the second trigger 15, direct the output of which is connected to the fourth sign of the first 19 logic element 4OR IS NOT, and inverted output this trigger 15 connected to the fourth sign of the second 20 logical element 4OR-NO, the yield of the first sensor 6 current half-transistor Converter 2 through 13 comparator connected to the S-input RS-flip-flop 14, power supply 2 contains third relay 21, winding C which is connected to the input of a single-phase bridge rectifier 5, and network active filter 22 formed successively United choke 23 and diode 24, the cathode of which is connected to the positive terminal half-transistor Converter 2 and the anode to the first terminal throttle 23 and collector power transistor 25, the emitter of which is connected to negative terminal of single-phase bridge rectifier 5 and with the first output current-limiting resistor 3, the second output of which is connected to the negative terminal half-transistor inverter 2, while the second terminal throttle 23 through the second sensor 26 current is connected to the positive terminal single-phase bridge rectifier 5, and zero input terminal input filter 8 traction batteries 9 through normally closed contact 21.2 power relay 21 is connected to the positive terminal half-transistor Converter 2 transformer-rectifier cascade 7 executed with two groups of secondary windings, the first of which 27 through rectifier diodes 28, 29 and normally closed contacts 21.3, 21.4 power relay 21 is connected to the input filter 30 onboard dvenadtsatiperstnoi batteries 31, and the second group of 32 of the secondary winding of the transformer rectifier cascade through 7 rectifier diodes 33, 34 and normally open contacts 21.5, 21.6 power relay 21 is connected to the input filter 8 traction batteries 9, and its negative conclusion through normally closed contact 21.7 power relay 21 is connected to the emitter of the power transistor 25, the basic conclusion of which over a third amplifier 35 power and relay element 36 with hysteresis characteristic connected to the output of the adder 37, to the inverting input of which comes output signal of the second sensor 26 current, and not inverting input of the adder comes 37 specifies the signal 38 required current through the throttle 23 network active filters 22, which is shaped strictly repeats output voltage single-phase bridge rectifier 5 power source 4, where the traction battery 9 and to Board dvenadtsatiperstnoi battery connected 31 respectively of the first 12 39 and the second PWM voltage regulators with opto output, the first of which 12 through normally open auxiliary contact 21.8 power relay 21 is connected to a third inputs of the first 19 and 20 second logical elements 4OR IS NOT, and the second PWM controller 39 voltage connected to these inputs through normally closed block-contact 21.9 power relay 21, and power supply 1 own needs connected to the onboard dvenadtsatiperstnoi batteries 31.

The device works as follows.

Upon initial connection to the mains power supply 4 charge capacitors half-transistor Converter 2 occurs through a limiting resistor 3 as the sensor 18 voltage not yet included the second relay 17. So the first 16 relay is enabled and blocks its normally open contact the passage of the control pulses half-transistor Converter 2. After capacitors half-transistor Converter 2 will charge to full voltage sensor 18 voltage includes the second relay 17, shunting it normally open contact current-limiting resistor 3 and thus disabling the first relay 16. Now on the input of the first 19 and 20 second logical elements 4OR IS NOT received zero volts, releasing blockage of control pulses half-transistor Converter 2. In the initial moment of time output voltage RS-flip-flop 14 is also equal to zero, since the current has not yet reached its limit. The voltage regulator 12 produces a sequence of pulses with a high potential of which is transfer of the second trigger 15 in opposite condition and is so called guaranteed pause, i.e. the prohibition of the simultaneous operation of transistors half-transistor Converter 2. If you have a low potential output voltage regulator 12 included, for example, through the first amplifier 10, the upper half-transistor transistor Converter 2. In the primary winding of the transformer rectifier cascade 7 starting to surge current. If the voltage of the rechargeable battery battery 9 is that the value of this current reaches the limit, you will comparator 13 and output RS-trigger 14 will be set high potential, resulting in the first amplifier 10, and hence the power transistor will be disabled. The current will begin to decrease, but the RS-trigger 14 will remain in the same position until, until you switched the cutting edge of the next pulse voltage regulator 12. This will change also, and the status of the second trigger 15 that will lead to the inclusion of the second amplifier 11 and lower half-transistor transistor Converter 2. The current in the primary winding of the transformer rectifier cascade 7 will drop to zero and begin to grow in the opposite direction. When he reaches the limit, the newly work comparator 13 disconnected and thus the amplifier 11. The process is repeated, providing the charge of the traction batteries 9 stable current.

If the voltage of traction batteries 9 has reached such a value that the current in the primary winding of the transformer rectifier cascade 7 does not increases up to the limit values, then trigger the comparator 13 does not occur and the time of transistors half-transistor Converter 2 is determined only by the voltage regulator 12.

Sudden disabling and enabling the mains voltage does not affect the operation algorithm of the onboard charger as a power source 1 own needs connected to the onboard dvenadtsatiperstnoi the battery 31

In the mode of charge onboard dvenadtsatiperstnoi the battery 31 the work of the proposed device is similar, differing only in that the power supply 4 dead and the voltage at the input of the half-transistor Converter 2 is served from traction batteries 9 through normally closed contacts and 21.2 21.7 dead the third relay 21.

On-Board charger, containing the power supply their own needs, half-transistor Converter, an input through a limiting resistor is connected to a power source, containing a single-phase bridge rectifier, and exit through the first current sensor is connected to the primary winding of a transformer-rectifier cascade input filter traction batteries, the first and second power to control half-bridge MOSFET transistor inverter, voltage regulator, comparator, RS-trigger and trigger with a counter input, the first and the second relay, the first conclusions coils are combined and connected to plusobama the conclusion of the internal power supply of the second amplifier, with the second conclusion of the first coil of the relay is connected to the center pin internal power supply of the second amplifier through normally closed contact of the second relay, normally open contacts of which bypasses the current-limiting resistor, and the second conclusion of the second coil of the relay is connected to the sensor output voltage of the power supply, the input of which is connected to the input of half-transistor Converter, first and the second logical elements 4OR-NOT the outputs are connected to the inputs respectively the first and second power amplifiers, with the input logic elements 4OR IS NOT connected through normally closed contact first relay to the center pin internal power supply of the second amplifier, and through the normally open contact of the same relay to the positive terminal of the power source, second input logic elements 4OR IS NOT connected to the direct output RS-trigger, third inputs to R-input RS-trigger and counting the input of the second trigger, direct the output of which is connected the fourth sign of the first logical element 4OR IS NOT, and inverted output this trigger connected to the fourth sign of the second logical element 4OR-NO, with the release of the first current sensor half-transistor inverter via connected to the comparator's input RS-trigger, characterized in that the power supply have introduced the third relay winding of which is connected to the input of a single-phase bridge rectifier, and network active filter, educated connected in a choke, and diode, the cathode of which is connected to the positive terminal half-transistor inverter and anode - to the first terminal throttle and collector power transistor, the emitter of which is connected to negative terminal of single-phase bridge rectifier and with the first output current-limiting resistor, the second output of which is connected to the negative terminal half-transistor Converter, while the second terminal of the throttle through the second current sensor is connected to the positive terminal single-phase bridge rectifier, and the positive terminal of the input filter traction batteries through normally closed contact power relay is connected to the positive terminal half-transistor Converter, with transformer-rectifier stage is executed with two groups of secondary windings, the first of which through rectifier diodes and normally closed contacts power relay is connected to the input filter onboard dvenadtsatiperstnoi the battery, and the second group through rectifier diodes and normally open contacts of power relay is connected to the input filter traction batteries, and its negative conclusion through normally closed contact power relay is connected to the emitter of the power transistor, the basic conclusion of which through the third power the power and relay element with hysteresis characteristic connected to the output of summary element to the inverting input of which comes output signal of the second sensor current, and not inverting input of the adder goes specifying the desired signal current through the inductor network of active filter that on the form strictly repeats output voltage single-phase bridge rectifier power supply, where the traction batteries and the onboard dvenadtsatiperstnoi the battery is connected respectively the first and second PWM voltage regulators with OPTRON output, the first of which over normally open block-contact power relays connected to any third inputs of the first and second logical elements 4OR IS NOT, and the second PWM voltage regulator connected to these inputs through normally closed block-contact power relays, and power supply for own needs is connected to the onboard dvenadtsatiperstnoi battery.

 

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