CN112751488B - Power supply circuit, compressor assembly and electric vehicle - Google Patents
Power supply circuit, compressor assembly and electric vehicle Download PDFInfo
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- CN112751488B CN112751488B CN201911053462.9A CN201911053462A CN112751488B CN 112751488 B CN112751488 B CN 112751488B CN 201911053462 A CN201911053462 A CN 201911053462A CN 112751488 B CN112751488 B CN 112751488B
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- 238000004891 communication Methods 0.000 claims abstract description 72
- 230000008878 coupling Effects 0.000 claims abstract description 54
- 238000010168 coupling process Methods 0.000 claims abstract description 54
- 238000005859 coupling reaction Methods 0.000 claims abstract description 54
- 238000002955 isolation Methods 0.000 claims description 28
- 230000009466 transformation Effects 0.000 claims description 27
- 230000001131 transforming effect Effects 0.000 claims 1
- 239000013589 supplement Substances 0.000 abstract description 4
- 238000004804 winding Methods 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a power supply circuit, a compressor assembly and an electric vehicle, wherein the power supply circuit comprises: a coupling circuit comprising a first side and a second side, the first side and the second side being coupled; a first power supply circuit comprising a first power source configured to be adapted to power the load and the controller, the first power supply circuit being connected to a first side of the coupling circuit; a second power supply circuit comprising a second power source configured to be adapted to supply power to the communication circuit, the second power supply circuit being connected to the second side of the coupling circuit. The coupling circuit is coupled, so that the first power supply circuit and the second power supply circuit can supply power mutually through the coupling relation, the first power supply circuit and the second power supply circuit are redundant and supplement to each other, when one set of power supply circuit is closed or fails, the other set of power supply circuit can supply power, and the use flexibility and reliability of the power supply circuit are improved.
Description
Technical Field
The invention relates to the technical field of power supply circuits, in particular to a power supply circuit, a compressor assembly and an electric vehicle.
Background
In the related art, for an electrical system in which a high-voltage part and a low-voltage part exist at the same time, power supply sources of the high-voltage part and the low-voltage part are independent of each other. When the power supply of the high-voltage part or the low-voltage part fails, the part of the electrical system is immediately powered off, so that the stability of the system is poor.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention proposes a supply circuit.
A second aspect of the present invention is directed to a compressor assembly.
A third aspect of the invention proposes an electric vehicle.
In view of the above, a first aspect of the present invention provides a power supply circuit, including: a coupling circuit comprising a first side and a second side, the first side and the second side being coupled; a first power supply circuit comprising a first power source configured to be adapted to power the load and the controller, the first power supply circuit being connected to a first side of the coupling circuit; a second power supply circuit comprising a second power source configured to be adapted to supply power to the communication circuit, the second power supply circuit being connected to the second side of the coupling circuit.
In the technical scheme, the power supply circuit comprises a coupling circuit, a first power supply circuit and a second power supply circuit, wherein the first power supply circuit and the second power supply circuit are respectively connected to one secondary side and a second side of the coupling circuit and are coupled through the coupling circuit, under the condition of realizing effective isolation between the first power supply circuit and the second power supply circuit, the first power supply circuit and the second power supply circuit can supply power mutually through the coupling relation, further the first power supply circuit and the second power supply circuit are mutually complemented in a redundancy way, when one set of power supply circuit is closed or fails, the other set of power supply circuit can supply power, and the use flexibility and reliability of the power supply circuit are improved.
In addition, the power supply circuit in the above technical solution provided by the present invention may further have the following additional technical features:
in the above technical solution, the coupling circuit includes: a first transformer circuit including a first primary coil formed as a first side and a first secondary coil formed as a second side; wherein the first primary coil is connected to a first power source and the second secondary coil is configured and adapted to power the communication circuit.
In the technical scheme, the coupling circuit comprises a first voltage transformation circuit, a first primary coil of the first voltage transformation circuit is formed as a first side of the coupling circuit, a first power supply of the first power supply circuit is connected with the first primary coil, and a first secondary coil of the first voltage transformation circuit is formed as a second side of the coupling circuit, so that electric energy provided by the first power supply supplies power for the communication circuit through coupling between the first primary coil and the first secondary coil, namely the first power supply circuit is used as redundancy supplement of the second power supply circuit.
In any of the above technical solutions, the coupling circuit further includes: a second transformer circuit including a second primary coil and a second secondary coil, the first primary coil and the second secondary coil being formed as a first side, the first secondary coil and the second primary coil being formed as a second side; wherein the second primary coil is connected with a second power supply, and the second secondary coil is configured and adapted to supply power to the controller.
In the technical scheme, the coupling circuit further comprises a second voltage transformation circuit, a second primary coil of the second voltage transformation circuit and a first secondary coil of the first voltage transformation circuit form a first side of the coupling circuit, and a second secondary coil of the second voltage transformation circuit and a first primary coil of the first voltage transformation circuit form a second side of the coupling circuit, so that electric energy provided by a second power supply can be used for supplying power to the controller through coupling between the second primary coil and the second secondary coil.
In any of the above technical solutions, the first power supply circuit further includes: an inverter connected with a first power source configured to be adapted to provide a driving signal to the inverter.
In the technical scheme, the first power supply is a direct current power supply, and under the condition that the load needs an alternating current power supply signal, the inverter is arranged in the first power supply circuit, and the direct current power supply signal is converted into the alternating current power supply signal through the inverter so as to be used by the load. The inverter comprises a plurality of groups of switching tubes, the control ends of the switching tubes are connected with a first power supply, and the first power supply phase switching tubes provide driving signals to control the inverter to work.
In any of the above technical solutions, the second voltage transformation circuit further includes a third primary coil and a third secondary coil, the first primary coil, the second secondary coil and the third secondary coil are formed as a first side, and the first secondary coil, the second primary coil and the third primary coil are formed as a second side; wherein the third primary coil is connected with the second power source, and the third secondary coil is configured to provide the driving signal to the inverter.
The first side, the third secondary coil and the first primary and second secondary coils are formed together as a second side of the coupling circuit, so that the electric energy provided by the second power source can provide the driving signal for the inverter through the coupling between the third primary coil and the third secondary coil. Specifically, when the first power supply fails and cannot normally provide a driving signal for the inverter, the driving signal is provided for the inverter through the second power supply, so that normal operation of a load can be ensured, and the stability and reliability of the power supply circuit are greatly improved.
In any of the above technical solutions, further, the power supply circuit further includes: the positive pole of the first one-way conduction element is connected with a first power supply, and the negative pole of the first one-way conduction element is connected with the controller; and the second one-way conduction element is connected with the first one-way conduction element in parallel, and the anode of the second one-way conduction element is connected with the second secondary coil.
In the technical scheme, a current flow path for supplying power to the controller is selected by arranging a first one-way conduction element and a second one-way conduction element which are connected in parallel. Specifically, when the voltage provided by the first power supply is higher, the first one-way conduction element is conducted, that is, the controller is powered by the first power supply. When the supply voltage from the second power supply is higher after the transformation is performed by the second transformation circuit, the second one-way conduction element is conducted, namely, the controller is supplied with power by the second power supply.
In any of the above technical solutions, the power supply circuit further includes: the anode of the third one-way conduction element is connected with the first power supply, and the cathode of the third one-way conduction element is connected with the inverter; and the fourth one-way conduction element is connected with the third one-way conduction element in parallel, the anode of the fourth one-way conduction element is connected with the third secondary coil, and the cathode of the fourth one-way conduction element is connected with the inverter.
In this technical solution, a current flow path for supplying a drive signal to the inverter is selected by providing a third unidirectional conductive element and a fourth unidirectional conductive element connected in parallel. Specifically, when the voltage provided by the first power supply is normal, the third unidirectional conductive element is turned on, that is, the inverter is provided with the driving signal by the first power supply. When the first power supply fails, the fourth one-way conduction is realized, namely, the driving signal is provided for the inverter through the second power supply.
In any of the above technical solutions, the power supply circuit further includes: the anode of the fifth one-way conduction element is connected with the second power supply, and the cathode of the fifth one-way conduction element is connected with the communication circuit; and the sixth one-way conduction element is connected with the fifth one-way conduction element in parallel, the anode of the sixth one-way conduction element is connected with the first secondary coil, and the cathode of the sixth one-way conduction element is connected with the communication circuit.
In the technical scheme, a current flow path for supplying power to the communication circuit is selected by arranging a fifth one-way conduction element and a sixth one-way conduction element which are connected in parallel. Specifically, when the voltage provided by the second power supply is higher, the fifth unidirectional conducting element is conducted, that is, the communication circuit is powered by the second power supply. When the supply voltage from the first power supply is higher after the voltage transformation is performed by the first voltage transformation circuit, the sixth one-way conduction element is conducted, namely, the communication circuit is supplied with power by the first power supply.
In any of the above technical solutions, the switching device is a diode or a switching tube.
In this solution, the switching device is a diode. In particular, the supply signal or the drive signal is selected by a diode. Taking the first unidirectional conducting element as the first diode and the second unidirectional conducting element as the second diode as an example, specifically, when the voltage provided by the first power supply is higher, the potential of the flow path where the first diode is located is higher, at this time, the first diode is conducted, and the second diode is cut off. When the supply voltage from the second power supply is higher after the voltage transformation by the second voltage transformation circuit, the second diode is conducted, and the first diode is cut off.
In any one of the above technical solutions, the communication circuit includes: a communication bus configured to be adapted to communicate with an external device; and the communication controller is connected with the communication bus.
In the technical scheme, the communication circuit comprises a communication bus and a communication controller, and the communication bus is connected with the external equipment. The communication controller sends or receives information through the communication bus and processes the information to complete communication.
In any of the above technical solutions, the power supply circuit further includes: one end of the isolation circuit is connected with the communication controller, and the other end of the isolation circuit is connected with the controller; wherein the isolation circuit is configured and adapted to isolate the communication controller from the controller and to communicate data between the communication controller and the controller.
In this technical solution, the power supply circuit further includes an isolation circuit. Specifically, when communicating with an external device through a communication circuit, data transmission is required between the controller and the communication controller. By arranging the isolation circuit, for example, the isolation chip transmits data between the communication controller and the controller, the power supply signals of the first power supply and the second power supply can be prevented from mixing into a communication line, and the reliability of isolation between the first power supply circuit and the second power supply circuit is ensured.
In any of the above technical solutions, a supply voltage of the first power supply is greater than a supply voltage of the second power supply; the first power supply circuit comprises a first grounding circuit, the second power supply circuit comprises a second grounding circuit, and the first grounding circuit and the second grounding circuit are insulated.
In the technical scheme, the first power supply circuit is a high-voltage side, the second power supply circuit is a low-voltage side, wherein a first grounding circuit of the first power supply circuit is insulated from a second grounding circuit of the second power supply circuit, namely the high-voltage side and the low-voltage side are not grounded, and the isolation reliability between the high-voltage side power supply circuit and the low-voltage side power supply circuit is further ensured.
A second aspect of the present invention provides a compressor assembly comprising a motor, and a power supply circuit as provided in any one of the above technical solutions, the power supply circuit being connected to the motor, the power supply circuit being configured and adapted to supply power to the motor; the power supply control system provided in any one of the above technical solutions. Therefore, the compressor assembly includes all the advantages of the power supply circuit and the power supply control system provided in any one of the above technical solutions, and details thereof are not described herein.
The invention provides an electric vehicle, which comprises a battery pack and a compressor assembly provided in any one of the technical schemes, wherein the compressor assembly is connected with the battery pack so as to obtain electric energy through the battery pack; and/or a power supply circuit as provided in any of the above solutions, the power supply circuit being connected to the battery pack and the load, the power supply circuit being configured and adapted to supply the load with electrical energy stored by the battery pack; and a power supply control system as provided in any of the above technical solutions. Therefore, the electric vehicle includes the compressor provided in any one of the above technical solutions, and/or the power supply circuit and the power supply control system provided in any one of the above technical solutions, and details thereof are not repeated herein.
Wherein, the load includes: an electric motor of an electric vehicle, and a compressor of an air conditioning system of the electric vehicle.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a circuit diagram of a power supply circuit according to one embodiment of the invention;
FIG. 2 shows a circuit diagram of a power supply circuit according to another embodiment of the invention;
FIG. 3 shows a schematic diagram of a coupling circuit in a power supply circuit according to an embodiment of the invention;
fig. 4 shows a block diagram of a compressor according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:
100 coupling circuit, 102 first power supply, 104 second power supply, 106 first transformation circuit, 108 first primary coil, 110 first secondary coil, 112 second transformation circuit, 114 second primary coil, 116 second secondary coil, 118 inverter, 120 third primary coil, 122 third secondary coil, 124 first unidirectional conducting element, 126 second unidirectional conducting element, 128 third unidirectional conducting element, 130 fourth unidirectional conducting element, 132 fifth unidirectional conducting element, 134 sixth unidirectional conducting element, 136 communication bus, 138 isolation circuit, 140 first grounding line, 142 second grounding line.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The power supply circuit, the compressor assembly, and the electric vehicle according to some embodiments of the present invention are described below with reference to fig. 1 to 4.
The first embodiment is as follows:
as shown in fig. 1, 2 and 3, in one embodiment of the present invention, a power supply circuit is provided, including a coupling circuit 100, a first power supply circuit and a second power supply circuit.
Specifically, the coupling circuit 100 includes a first side and a second side, the first side and the second side being coupled; a first power supply circuit comprising a first power source 102, the first power source 102 being configured to be suitable for powering a load and a controller, the first power supply circuit being connected to a first side of the coupling circuit 100; a second power supply circuit comprising a second power supply 104, the second power supply 104 being configured and adapted to supply power to the communication circuit, the second power supply circuit being connected to the second side of the coupling circuit 100.
In some embodiments, coupling circuit 100 includes: a first transformer circuit 106 including a first primary coil 108 and a first secondary coil 110, the first primary coil 108 being formed as a first side, the first secondary coil 110 being formed as a second side; wherein the first primary coil 108 is connected to the first power source 102 and the second secondary coil 116 is configured and adapted to power the communication circuitry.
In some embodiments, the coupling circuit 100 further comprises: a second transformer circuit 112 including a second primary coil 114 and a second secondary coil 116, the first primary coil 108 and the second secondary coil 116 being formed as a first side, the first secondary coil 110 and the second primary coil 114 being formed as a second side; wherein the second primary winding 114 is connected to the second power source 104 and the second secondary winding 116 is configured and adapted to power the controller.
In some embodiments, the first power supply circuit further comprises: an inverter 118 connected to the first power source 102, the first power source 102 being configured to provide a drive signal to the inverter 118.
In some embodiments, the second transformer circuit 112 further includes a third primary coil 120 and a third secondary coil 122, the first primary coil 108, the second secondary coil 116, and the third secondary coil 122 formed as a first side, the first secondary coil 110, the second primary coil 114, and the third primary coil 120 formed as a second side; wherein the third primary winding 120 is connected to the second power source 104 and the third secondary winding 122 is configured and adapted to supply power to the load.
In some embodiments, the supply voltage of the first power supply 102 is greater than the supply voltage of the second power supply 104; the first power supply circuit includes a first ground circuit 140, the second power supply circuit includes a second ground circuit 142, and the first ground circuit 140 and the second ground circuit 142 are insulated.
In this embodiment, an application scenario of the power supply circuit is taken as an electric vehicle as an example. In an electric vehicle, there is a high voltage part, which is powered by a lithium battery pack, and a low voltage part, which is powered by a lead acid battery, i.e. a "battery". Wherein, the output voltage range of lithium cell group generally is: the output voltage range of the lead-acid battery is generally from 300V to 470V: 10V to 15V, and at most 12V.
The high-voltage part mainly supplies power to a load and a controller, wherein the load comprises a power motor and a compressor of an air conditioning system. The low voltage part mainly supplies power to the communication circuit. The coupling circuit 100, specifically the first voltage transformation circuit 106 and the second voltage transformation circuit 112, is added to the power supply circuit, and is used for boosting a low-voltage power supply signal output by the lead-acid battery and supplying the boosted low-voltage power supply signal to a high-voltage side, and reducing a high-voltage power supply signal output by the lithium battery pack and supplying the reduced high-voltage power supply signal to a low-voltage side.
For an electric vehicle, the voltage on the low-voltage side is lower than the safety voltage, and therefore the ground on the low-voltage side is generally connected to the vehicle body metal. The high-voltage side is higher than the safe voltage, so that the high-voltage side circuit needs to be isolated from the low-voltage side circuit integrally for ensuring safety, and meanwhile, the high-voltage side and the low-voltage side are not grounded together for ensuring effective and reliable isolation.
Specifically, the first primary coil 108 of the first transformer circuit 106 is formed as a first side of the coupling circuit 100, the first power source 102 of the first power supply circuit is connected to the first primary coil 108, and the first secondary coil 110 of the first transformer circuit 106 is formed as a second side of the coupling circuit 100, so that the electric energy provided by the first power source 102 supplies power to the communication circuit through the coupling between the first primary coil 108 and the first secondary coil 110, that is, the first power supply circuit is used as a redundant supplement of the second power supply circuit, when the second power supply circuit, especially the second power source 104, has a problem, the communication circuit can be supplied with power through the first power supply circuit, and the reliability of the power supply circuit is improved.
The second primary coil 114 of the second transformer circuit 112 and the first secondary coil 110 of the first transformer circuit 106 are formed as a first side of the coupling circuit 100, and the second secondary coil 116 of the second transformer circuit 112 and the first primary coil 108 of the first transformer circuit 106 are formed as a second side of the coupling circuit 100, so that the electric energy provided by the second power source 104 can supply power to the controller through the coupling between the second primary coil 114 and the second secondary coil 116, and when the first power supply circuit, especially the first power source 102, fails, the controller can be supplied with power through the second power supply circuit, thereby improving the reliability of the power supply circuit.
In an electric vehicle, the lithium battery pack outputs a dc signal, and the electrical signal required for the operation of the motor is an ac signal, so that an inverter 118 is provided in the first power supply circuit, and the dc signal is converted into an ac signal by the inverter 118 for driving the motor. The inverter 118 includes a plurality of sets of switching tubes, control ends of the switching tubes are connected to the first power source 102, and the switching tubes of the first power source 102 provide driving signals to control the inverter 118 to operate.
The third primary coil 120 and the first and second secondary coils 110 and 114 together form a first side of the coupling circuit 100, and the third secondary coil 122 and the first and second secondary coils 116 together form a second side of the coupling circuit 100, so that the power supplied by the second power source 104 can supply power to the load through the coupling between the third primary coil 120 and the third secondary coil 122, when the first power source 102 fails, for example, the first power source 102 can still supply power to the motor (can supply high voltage power), but when the first power source 102 cannot normally supply a driving signal (low voltage signal) to the inverter 118 due to the failure of the output system, the driving signal can be supplied to the inverter 118 through the second power source 104, so as to maintain the normal operation of the vehicle for a certain time, so that the user can drive to a safe place to stop the vehicle. The safety of the electric vehicle using the power supply circuit provided by the invention is greatly improved.
The coupling circuit 100 is arranged to couple the first power supply circuit and the second power supply circuit, so that the first power supply circuit and the second power supply circuit can supply power mutually through the coupling relation under the condition of realizing effective isolation between the first power supply circuit and the second power supply circuit, and further the first power supply circuit and the second power supply circuit are mutually redundant and supplement.
Example two:
as shown in fig. 1, 2 and 3, in one embodiment of the present invention, the power supply circuit further includes: a first unidirectional conducting element 124, wherein the anode of the first unidirectional conducting element 124 is connected with the first power source 102, and the cathode of the first unidirectional conducting element 124 is connected with the controller; a second unidirectional conducting device 126 connected in parallel with the first unidirectional conducting device 124, and an anode of the second unidirectional conducting device 126 is connected to the second secondary winding 116.
In some embodiments, the power supply circuit further comprises: a third unidirectional conducting element 128, wherein the anode of the third unidirectional conducting element 128 is connected with the first power source 102, and the cathode of the third unidirectional conducting element 128 is connected with the load; the fourth unidirectional conducting element 130 is connected in parallel to the third unidirectional conducting element 128, the positive pole of the fourth unidirectional conducting element 130 is connected to the third secondary coil 122, and the negative pole of the fourth unidirectional conducting element 130 is connected to the load.
In some embodiments, the power supply circuit further comprises: a fifth unidirectional conducting element 132, wherein the anode of the fifth unidirectional conducting element 132 is connected with the second power supply 104, and the cathode of the fifth unidirectional conducting element 132 is connected with the communication circuit; the sixth unidirectional conducting element 134 is connected in parallel to the fifth unidirectional conducting element 132, the anode of the sixth unidirectional conducting element 134 is connected to the first secondary coil 110, and the cathode of the sixth unidirectional conducting element 134 is connected to the communication circuit.
In this embodiment, first unidirectional conducting element 124, second unidirectional conducting element 126, third unidirectional conducting element 128, fourth unidirectional conducting element 130, fifth unidirectional conducting element 132 and sixth unidirectional conducting element 134 may be selected as diodes. The parallel diodes ensure that only one path of power supply is effective in work.
In some embodiments, the switching device is a diode or a switching tube.
Specifically, when the first power source 102 and the second power source 104 both work normally, the first power source 102 and the second power source 104 work simultaneously and supply power to the subsequent circuit, that is, the power is supplied by the "dual power sources", so that the reliability of power supply is ensured.
When the second power source 104 fails, the first power source 102 provides a higher voltage than the second power source 104, and power is supplied to the controller through the first power source 102. When the first power supply 102 fails, the voltage output by the second power supply 104 is higher than the voltage output by the first power supply 102, and power is supplied to the controller through the second power supply 104.
When the first power supply 102 works normally and the second power supply 104 fails, the fifth unidirectional conducting element 132 is turned on, that is, the first power supply 102 supplies power to the communication circuit. When the first power source 102 fails, the fourth unidirectional conducts, i.e., provides a drive signal to the inverter 118 through the second power source 104.
When the second power supply 104 works normally and the first power supply 102 fails, the sixth unidirectional conducting element 134 is turned on, that is, the communication circuit is powered by the second power supply 104. The first power supply circuit (namely, the high-voltage side) and the second power supply circuit (namely, the low-voltage side) are coupled through the transformation circuit and are redundantly supplemented with each other, so that the reliability of the power supply is improved on the basis of not changing the original power supply structure.
Example three:
as shown in fig. 3, in one embodiment of the present invention, the power supply circuit further includes: one end of the isolation circuit 138 is connected with the communication controller, and the other end of the isolation circuit 138 is connected with the controller; wherein the isolation circuitry 138 is configured and adapted to isolate the communication controller from the controller and to communicate data between the communication controller and the controller.
In some embodiments, the communication circuit comprises: a communication bus 136 configured to be suitable for communicating with external devices; a communication controller coupled to the communication bus 136.
In this embodiment, since the low-voltage side circuit ground is generally connected to the metal of the vehicle body, the high-voltage side circuit needs to be effectively isolated from the low-voltage side circuit in order to ensure safety. Meanwhile, when communicating with an external device through a communication circuit, data transmission is required between the controller and the communication controller. By providing the isolation circuit 138, for example, an isolation chip, to transmit data between the communication controller and the controller, the power supply signals of the first power supply 102 and the second power supply 104 can be prevented from mixing into the communication line, and the reliability of isolation between the first power supply circuit and the second power supply circuit is ensured.
Specifically, the communication circuit includes a communication bus 136 and a communication controller, and the communication bus 136 is connected to an external device. The communication controller sends or receives information via the communication bus 136 and processes the information to complete the communication.
Example four:
in a complete embodiment of the present invention, as shown in fig. 1, 2 and 3, the secondary power source 104 is a dc low voltage power source, such as an on-board low voltage lead acid battery, i.e., a "battery". The power supply scheme with the second power supply 104 as the power supply source of the controller is used as one path of the dual power supply, and mainly comprises a direct-current low-voltage power supply (the second power supply 104) which passes through a primary coil of the first voltage transformation circuit 106, and a preset voltage (2) generated by the low-voltage direct-current power supply is input to the low-voltage side communication controller after passing through a diode, so as to supply power to the communication controller.
In addition, in the secondary winding (high voltage side) of the first transformer circuit 106, a predetermined voltage (5) transformed by the first transformer circuit 106 is input to the controller as a power supply source of the controller after passing through one diode.
Meanwhile, in this one-line power supply, the predetermined voltage (4) transformed by the first transformation circuit 106 is supplied to the inverter 118 as the gate drive voltage of the inverter 118 of one line.
The second voltage transformation circuit 112 is used as a conversion core, and the high-voltage power supply (the first power supply 102) is used as an input voltage to form a second control electric power supply network.
The dual-power supply network of the communication controller is mainly composed of a high-voltage power supply, a secondary coil (low-voltage side) of a second voltage transformation circuit 112, a preset voltage (1) generated by the high-voltage power supply is input into the low-voltage side communication controller through a diode, and then the preset voltage is connected with a power supply (2) and supplies power for the communication controller at the same time.
At the same time, the predetermined voltage (6) transformed by the primary winding of the second transformation circuit 112 will power the controller on the high-voltage side at the same time as the power supply (5) previously generated by the voltage power supply.
The other path of the predetermined voltage (3) transformed by the primary side of the second transformation circuit 112 supplies power to the gate driver of the inverter 118 at the same time as the power source (4) generated by the voltage source.
In the motor control device adopting the above-described power supply structure, direct current supplied from a high-voltage power supply is converted into controllable alternating current by an inverter 118 including 6-way switching elements and a gate drive circuit, and the alternating current drives the motor.
The command signal from the vehicle control unit is transmitted to the controller on the high-voltage side through the communication bus 136 and the isolation chip, and then the controller controls the gate driving circuit of the switching element according to the command of the upper computer, and therefore controls the alternating voltage input of the motor.
The isolation chip can adopt optical coupling isolation and capacitive coupling isolation. In some embodiments, the capacitive coupling isolation chip is adopted, so that the electrical safety can be ensured.
The present invention divides the operation area by the primary coil of the second transformer circuit 112, the secondary coil of the first transformer circuit 106, the capacitive coupling isolation chip to the controller and the inverter 118, the motor side is configured as the high voltage area, the other part is configured as the low voltage area, the boundary of the two areas is the insulation boundary, and the second transformer circuit 112, the first transformer circuit 106, the second transformer circuit 106 and the capacitive coupling isolation chip are part of the insulation boundary.
Example five:
as shown in fig. 4, in one embodiment of the present invention, there is provided a compressor assembly 400 comprising a motor 402, and a power supply circuit as provided in any of the above embodiments, the power supply circuit being connected to the motor 402, the power supply circuit being configured and adapted to supply power to the motor 402. Therefore, the compressor assembly includes all the advantages of the power supply circuit provided in any of the above embodiments, which are not described herein again.
Example six:
in one embodiment of the invention, an electric vehicle is provided, which comprises a battery pack, and a compressor assembly as provided in any of the above embodiments, wherein the compressor is connected with the battery pack to obtain electric energy through the battery pack; and/or a power supply circuit as provided in any of the above embodiments, the power supply circuit being connected to the battery pack and the load, the power supply circuit being configured and adapted to supply electrical energy stored by the battery pack to the load. Therefore, the electric vehicle includes the compressor assembly provided in any one of the above embodiments, and/or the power supply circuit provided in any one of the above embodiments, and the whole advantages thereof are not described herein again.
Wherein, the load includes: an electric motor of an electric vehicle, and a compressor of an air conditioning system of the electric vehicle.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically defined, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A power supply circuit, comprising:
a coupling circuit comprising a first side and a second side, the first side and the second side being coupled;
a first power supply circuit comprising a first power source configured to be adapted to power a load and a controller, the first power supply circuit connected to a first side of the coupling circuit;
a second power supply circuit comprising a second power source configured to be adapted to power the communication circuit, the second power supply circuit being connected to the second side of the coupling circuit;
the coupling circuit includes:
a first transformer circuit including a first primary coil formed as the first side and a first secondary coil formed as the second side;
wherein the first primary coil is connected with the first power supply, the first secondary coil being configured and adapted to power the communication circuit;
the coupling circuit further comprises:
a second voltage transformation circuit including a second primary coil and a second secondary coil, the first primary coil and the second secondary coil being formed as the first side, the first secondary coil and the second primary coil being formed as the second side;
wherein the second primary coil is connected to the second power source, the second secondary coil being configured and adapted to power the controller.
2. The power supply circuit of claim 1, wherein the first power supply circuit further comprises:
an inverter connected with the first power source, the first power source configured to be adapted to provide a drive signal to the inverter.
3. The power supply circuit of claim 2, wherein the second transforming circuit further comprises:
a third primary coil and a third secondary coil, the first, second and third primary coils formed as the first side, the first, second and third secondary coils formed as the second side;
wherein the third primary coil is connected with the second power source, and the third secondary coil is configured to provide a driving signal to the inverter.
4. The power supply circuit of claim 3, further comprising:
the positive electrode of the first unidirectional conduction element is connected with the first power supply, and the negative electrode of the first unidirectional conduction element is connected with the controller;
and the second one-way conduction element is connected with the first one-way conduction element in parallel, and the anode of the second one-way conduction element is connected with the second secondary coil.
5. The power supply circuit of claim 3, further comprising:
a third unidirectional conducting element, an anode of the third unidirectional conducting element is connected with the first power supply, and a cathode of the third unidirectional conducting element is connected with the inverter;
and the fourth unidirectional conducting element is connected with the third unidirectional conducting element in parallel, the anode of the fourth unidirectional conducting element is connected with the third secondary coil, and the cathode of the fourth unidirectional conducting element is connected with the inverter.
6. The power supply circuit of claim 3, further comprising:
a fifth unidirectional conducting element, an anode of which is connected with the second power supply, and a cathode of which is connected with the communication circuit;
and the sixth one-way conduction element is connected with the fifth one-way conduction element in parallel, the anode of the sixth one-way conduction element is connected with the first secondary coil, and the cathode of the sixth one-way conduction element is connected with the communication circuit.
7. The power supply circuit according to any one of claims 1 to 6, wherein the communication circuit includes:
a communication bus configured to be adapted to communicate with an external device;
and the communication controller is connected with the communication bus.
8. The power supply circuit of claim 7, further comprising:
one end of the isolation circuit is connected with the communication controller, and the other end of the isolation circuit is connected with the controller;
wherein the isolation circuit is configured and adapted to isolate the communication controller from the controller and to communicate data between the communication controller and the controller.
9. The power supply circuit according to any one of claims 1 to 6, wherein a supply voltage of the first power supply is greater than a supply voltage of the second power supply;
the first power supply circuit comprises a first grounding circuit, the second power supply circuit comprises a second grounding circuit, and the first grounding circuit and the second grounding circuit are insulated.
10. A compressor assembly, comprising:
a compressor;
the power supply circuit according to any one of claims 1 to 9, connected with the compressor, the power supply circuit being configured and adapted to supply power to the compressor.
11. An electric vehicle, characterized by comprising:
a battery pack; and
the compressor assembly of claim 10, coupled to the battery pack to draw electrical energy through the battery pack; and/or
The power supply circuit according to any one of claims 1 to 9, connected with the battery pack and a load, the power supply circuit being configured and adapted to supply the load with electrical energy stored by the battery pack.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911053462.9A CN112751488B (en) | 2019-10-31 | 2019-10-31 | Power supply circuit, compressor assembly and electric vehicle |
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| CN201911053462.9A CN112751488B (en) | 2019-10-31 | 2019-10-31 | Power supply circuit, compressor assembly and electric vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113258762B (en) * | 2021-05-20 | 2022-04-26 | 潍柴动力股份有限公司 | A low-voltage power supply circuit of a motor controller |
| EP4432529A4 (en) * | 2021-11-12 | 2025-01-08 | Mitsubishi Electric Corporation | ELECTRONIC CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE |
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