CN204168176U - A kind of inverter dc-link capacitance discharge circuit - Google Patents
A kind of inverter dc-link capacitance discharge circuit Download PDFInfo
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- CN204168176U CN204168176U CN201420663921.1U CN201420663921U CN204168176U CN 204168176 U CN204168176 U CN 204168176U CN 201420663921 U CN201420663921 U CN 201420663921U CN 204168176 U CN204168176 U CN 204168176U
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Abstract
The utility model proposes a kind of inverter dc-link capacitance discharge circuit, by being connected by the control end of one end of the first resistance with the first power switch pipe, the other end is all connected with DC bus positive pole with one end of the 4th resistance; The other end of the 4th resistance is connected with the input of described first power switch pipe, the output of the first power switch pipe is connected with the points of common connection of positive bus-bar electric capacity with negative busbar electric capacity, and is connected with the input of described second power switch pipe by the 5th resistance; The control end of the second power switch pipe is connected with the two ends of the 3rd resistance respectively one by one with output, and the output head grounding of the second power switch pipe; The two ends of the second resistance are connected with the control end of the second power switch pipe one by one with the control end of the first power switch pipe respectively; Small-signal switch module is with the 3rd resistor coupled in parallel and be connected with the auxiliary power output end of inverter, solves power resistor difficult design in prior art, and discharge time is long and can not meet the problem that safety requires.
Description
Technical field
The utility model relates generally to the application of inverter in grid-connected power generation system, more particularly relates to a kind of inverter dc-link capacitance discharge circuit.
Background technology
Inverter is requisite adjusting device in grid-connected power generation system; be mainly used to converting direct-current power into alternating-current power; and in high-power inverter; in order to support that busbar voltage needs the bus capacitor of its inverter DC side to adopt jumbo dc-link capacitance usually; but direct current can be made like this to input power down after; bus capacitor voltage maintains high value for a long time; thus; when discharging to this dc-link capacitance after equipment downtime, to avoid, during repair apparatus, Danger Electric shock risk occurs.
Based on this, dc-link capacitance two ends parallel power resistance normally at inverter in prior art discharges, but, because this power resistor can be in conducting state in equipment running process always, amount of heat can be produced, the resistance increasing this power resistor increases system loss, although can improve this problem.But the resistance of power resistor is crossed conference and is extended discharge time, and, after the accessory power supply power down of this inverter, there is potential potential safety hazard, and do not meet safety requirement.
Utility model content
In view of this, the utility model provides a kind of inverter dc-link capacitance discharge circuit, and solve prior art power resistor difficult design, discharge time is long, and does not meet the technical problem of safety requirement.
For achieving the above object, technical scheme provided by the utility model is as follows:
A kind of inverter dc-link capacitance discharge circuit, described inverter dc-link capacitance comprises positive bus-bar electric capacity and the negative busbar electric capacity of series connection, described discharge circuit comprises: the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first power switch pipe, the second power switch pipe and small-signal switch module, wherein:
One end of described first resistance is connected with the control end of described first power switch pipe, and the other end is all connected with DC bus positive pole with one end of described 4th resistance, and the other end of described 4th resistance is connected with the input of described first power switch pipe;
The output of described first power switch pipe is connected with the points of common connection of described positive bus-bar electric capacity with described negative busbar electric capacity, and is connected with the input of described second power switch pipe by described 5th resistance;
The control end of described second power switch pipe is connected with the two ends of described 3rd resistance respectively one by one with output, and the output head grounding of described second power switch pipe;
The two ends of described second resistance are connected with the control end of described second power switch pipe one by one with the control end of described first power switch pipe respectively;
Described small-signal switch module and described 3rd resistor coupled in parallel, and be connected with the auxiliary power output end of described inverter;
Described positive bus-bar electric capacity and the ratio of the capacity of negative busbar electric capacity equal the ratio of described first resistance and the resistance of described second resistance.
Preferably, described discharge circuit also comprises the 6th resistance, is connected by described 6th resistance to make described accessory power supply with described small-signal switch module.
Preferably, described small-signal switch module comprises: the 7th resistance and the 3rd power switch pipe, wherein:
The control end of described 3rd power switch pipe is connected with described accessory power supply by described 6th resistance, and input is connected with the points of common connection of described second resistance with described 3rd resistance, output head grounding;
One end of described 7th resistance is connected with the control end of described 3rd power switch pipe, and the other end is connected with the output of described 3rd power switch pipe.
Preferably, described small-signal switch module is specially isolation optocoupler, and the former limit of described isolation optocoupler is light-emitting diode, and secondary is triode, wherein:
The anode of described light-emitting diode is connected with described accessory power supply by described 6th resistance, minus earth;
The collector and emitter of described triode is connected one by one with the two ends of described 3rd resistance respectively, and described grounded emitter.
Preferably, described first power switch pipe, described second power switch pipe and described 3rd power switch pipe are all NPN type triode;
Then described control end is the base stage of described NPN type triode, and described input is the collector electrode of described NPN type triode, and described output is the emitter of described NPN type triode.
Preferably, described first power switch pipe, described second power switch pipe and described 3rd power switch pipe are all N-channel MOS pipes;
Then described control end is the grid of described N-channel MOS pipe, and described input is the drain electrode of described N-channel MOS pipe, and described output is the source electrode of described N-channel MOS pipe.
Preferably, described first power switch pipe, described second power switch pipe and described 3rd power switch pipe are all IGBT pipes;
Then described control end is the grid of described IGBT pipe, and described input is the drain electrode of described IGBT pipe, and described output is the source electrode of described IGBT pipe.
Preferably, described isolation optocoupler is specially the optocoupler of TLP521 model.
Preferably, described positive bus-bar electric capacity is equal with the capacity of described negative busbar electric capacity, and the resistance of described first resistance equals the resistance of described second resistance.
Preferably, described first resistance, described second resistance, described 3rd resistance, described 4th resistance and described 5th resistance are specifically power resistor or by multiple Chip-R resistance string in series.
As can be seen here, the utility model proposes a kind of inverter dc-link capacitance discharge circuit, by being connected by the control end of one end of the first resistance with the first power switch pipe, the other end is all connected with DC bus positive pole with one end of the 4th resistance; The other end of the 4th resistance is connected with the input of described first power switch pipe, the output of the first power switch pipe is connected with the points of common connection of positive bus-bar electric capacity with negative busbar electric capacity, and is connected with the input of described second power switch pipe by the 5th resistance; The control end of the second power switch pipe is connected with the two ends of the 3rd resistance respectively one by one with output, and the output head grounding of the second power switch pipe; The two ends of the second resistance are connected with the control end of the second power switch pipe one by one with the control end of the first power switch pipe respectively; Small-signal switch module is with the 3rd resistor coupled in parallel and be connected with the auxiliary power output end of inverter.Based on this, when inverter system normally runs, accessory power supply output voltage makes the conducting of small-signal switch module, two switch controlled ends are made not reach the condition of opening and end like this, main discharge circuit stops electric discharge, to solve in prior art power resistor conducting always and generating heat during this period, and increase the problem of system loss; And when after the power down of inverter direct current, can quit work from the accessory power supply of direct current power taking, small signal device is turned off, by selecting the resistance of the first resistance, the second resistance and the 3rd resistance, make two switch controlled ends reach the condition of opening and conducting, then dc-link capacitance is by corresponding discharge resistance repid discharge, shortens discharge time, and stopped potential potential safety hazard, meet safety requirement.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the structural representation of a kind of inverter dc-link capacitance of the utility model discharge circuit embodiment;
Fig. 2 is the discharge curve of a kind of inverter dc-link capacitance of the utility model discharge circuit embodiment;
Fig. 3 is the circuit connection diagram of a kind of inverter dc-link capacitance of the utility model discharge circuit specific embodiment;
Fig. 4 is the circuit connection diagram of the utility model another kind of inverter dc-link capacitance discharge circuit specific embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model proposes a kind of inverter dc-link capacitance discharge circuit, by being connected by the control end of one end of the first resistance with the first power switch pipe, the other end is all connected with DC bus positive pole with one end of the 4th resistance; The other end of the 4th resistance is connected with the input of described first power switch pipe, the output of the first power switch pipe is connected with the points of common connection of positive bus-bar electric capacity with negative busbar electric capacity, and is connected with the input of described second power switch pipe by the 5th resistance; The control end of the second power switch pipe is connected with the two ends of the 3rd resistance respectively one by one with output, and the output head grounding of the second power switch pipe; The two ends of the second resistance are connected with the control end of the second power switch pipe one by one with the control end of the first power switch pipe respectively; Small-signal switch module is with the 3rd resistor coupled in parallel and be connected with the auxiliary power output end of inverter.Based on this, when inverter system normally runs, accessory power supply output voltage makes the conducting of small-signal switch module, two switch controlled ends are made not reach the condition of opening and end like this, main discharge circuit stops electric discharge, to solve in prior art power resistor conducting always and generating heat during this period, and increase the problem of system loss; And when after the power down of inverter direct current, can quit work from the accessory power supply of direct current power taking, small signal device is turned off, by selecting the resistance of the first resistance, the second resistance and the 3rd resistance, make two switch controlled ends reach the condition of opening and conducting, then dc-link capacitance is by corresponding discharge resistance repid discharge, shortens discharge time, and stopped potential potential safety hazard, meet safety requirement.
With reference to the structural representation of a kind of inverter dc-link capacitance discharge circuit shown in Fig. 1, this discharge circuit can comprise: the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the first power switch pipe Q1, the second power switch pipe Q2 and small-signal switch module 100, wherein:
One end of first resistance R1 is connected with the control end of the first power switch pipe Q1, and the other end is all connected with DC bus positive pole PV+ with one end of the 4th resistance R4, and the other end of the 4th resistance R4 is connected with the input of the first power switch pipe Q1.
The output of the first power switch pipe Q1 is connected with the points of common connection N of negative busbar electric capacity C2 with positive bus-bar electric capacity C1, and is connected with the input of described second power switch pipe Q2 by the 5th resistance R5.
Wherein, this first power switch pipe Q1 is specifically as follows NPN type triode, now, the control end of the first power switch pipe Q1 is the base stage of NPN type triode, the input of the first power switch pipe Q1 is the collector electrode of NPN type triode, and the output of the first power switch pipe Q1 is the emitter of NPN type triode.
Certainly, this first power switch pipe Q1 also can be that N-channel MOS pipe or IGBT manage (InsulatedGate Bipolar Transistor, insulated gate bipolar transistor), then the control end of the first power switch pipe Q1 is the grid of N-channel MOS pipe or IGBT pipe, the input of the first power switch pipe Q1 is the drain electrode of N-channel MOS pipe or IGBT pipe, and the output of the first power switch pipe Q1 is the source electrode of N-channel MOS pipe or IGBT pipe.The concrete model of the utility model to the first power switch pipe Q1 does not do concrete restriction.
The control end of the second power switch pipe Q2 is connected with the two ends of described 3rd resistance R3 respectively one by one with output, and the output head grounding of described second power switch pipe Q2.
Wherein, in the utility model, this second power switch pipe Q2 is specifically as follows NPN type triode, N-channel MOS pipe or IGBT pipe, then the control end of this second power switch pipe Q2, input are identical with above-mentioned first power switch pipe Q1 with the corresponding meaning of output, and the utility model is not described in detail in this.
The two ends of the second resistance R2 are connected with the control end of described second power switch pipe Q2 one by one with the control end of described first power switch pipe Q1 respectively.
Wherein, the first resistance R1 to the 5th resistance R5 can be power resistor or by multiple Chip-R resistance string in series, the utility model does not do concrete restriction to this.
It should be noted that, the ratio of the first resistance R1 and the resistance of the second resistance R2 and the ratio of positive bus-bar electric capacity C1 with the capacity of negative busbar electric capacity C2.Preferably, the first resistance R1 can be equal with the resistance of the second resistance R2, and now positive bus-bar electric capacity C1 is also equal with the capacity of negative busbar electric capacity C2, i.e. R1=R2, C1=C2.
Small-signal switch module 100 is in parallel with described 3rd resistance R3, and is connected with the accessory power supply VCC output of described inverter.
Optionally, in this application, this small-signal switch module 100 can be made up of the 7th resistance and the 3rd power switch pipe, wherein, the control end of the 3rd power switch pipe is connected with accessory power supply by the 6th resistance, input is connected with the points of common connection of the second resistance with the 3rd resistance, output head grounding; One end of 7th resistance is connected with the control end of the 3rd power switch pipe, and the other end is connected with the output of the 3rd power switch pipe.Certainly, this small-signal switch module 100 can be also isolation optocoupler, and the application does not do concrete restriction to this, and both modes operation principle is in actual applications similar.
Concrete, discharge curve shown in composition graphs 2, in the practical application of the utility model embodiment, when inverter normally works, accessory power supply VCC makes small-signal switch module 100 conducting, the points of common connection M1 ground connection of the second resistance R1 and the 3rd resistance R3, thus the second power switch pipe Q2 is ended, now, the input voltage of the first power switch pipe Q1 control end is determined by the first resistance R1 and the second resistance R2 dividing potential drop, because positive bus-bar electric capacity C1 and the ratio of the capacity of negative busbar electric capacity C2 equal the ratio of the first resistance R1 and the resistance of the second resistance R2, therefore, the current potential of the points of common connection M of this first resistance R1 and the second resistance R2 equals the current potential of the points of common connection N of positive bus-bar electric capacity C1 and negative busbar electric capacity C2, namely M point current potential is equal with M2 point current potential, so, first power switch pipe Q1 ends, discharge resistance i.e. the 4th resistance R4 and the 5th resistance R5 open circuit.
As can be seen here, compared with the discharge circuit only having power resistor and dc-link capacitance parallel connection to form of the prior art, in inverter normal course of operation, resistance (the 4th resistance and the 5th resistance) in the discharge circuit that the utility model provides is not energized, thus, also would not increase the loss of system, namely solve because power resistor is energized during invertor operation always in prior art, and increase the problem of system loss.
In addition, when after the power down of inverter direct current, will quit work from the accessory power supply VCC of direct current power taking, then small-signal switch module 100 ends, and now the voltage of M point voltage and M1 point is respectively:
Wherein, U1 is DC bus-bar voltage, when DC input voitage is stable, and M point voltage V
mwith the voltage V of M1 point
m1by the first resistance R1, the resistance of the second resistance R2 and the 3rd resistance R3 determines, so, the application is by selection first resistance R1, the resistance of the second resistance R2 and the 3rd resistance R3 makes the first power switch pipe Q1 and the second power switch pipe Q2 conducting, thus the residual voltage U2 of positive bus-bar electric capacity C1 is discharged by the 4th resistance R4, the residual voltage U3 of negative busbar electric capacity C2 is discharged by the 5th resistance R5, through certain hour (t0 as in Fig. 2), under the residual voltage U2 of positive bus-bar electric capacity C1 and the residual voltage U3 of negative busbar electric capacity C2 will drop to safety value, now can not meet the conducting voltage of the first power switch pipe Q1 and the second power switch pipe Q2, then this first power switch pipe Q1 and the second power switch pipe Q2 will end, so, residual voltage under the safety value of positive bus-bar electric capacity C1 and negative busbar electric capacity C2 will be discharged by the first resistance R1 and the second resistance R2.
As can be seen here, the application is in conjunction with the characteristic of power switch pipe, achieve the repid discharge of the residual voltage of dc-link capacitance, meet the requirement of IEC61800 standard safety, namely after dump, any residual voltage of power electronic equipment is higher than the exposed conductive part of 60V, all should discharge into 60V or below 60V within 5 minutes, thus, the application can the resistance of resistance of choose reasonable R1 ~ R5, to reach this safety requirement.It should be noted that, for the concrete resistance of R1 ~ R5 resistance, the application does not do concrete restriction, requires as long as meet safety.And due to the resistance to low pressure of power switch pipe, range of choice is large, and overcome prior art power resistor difficult design, discharge time is long, does not meet the shortcomings such as safety requirement.
Embodiment two:
With reference to the circuit connection diagram of the specific embodiment of a kind of inverter dc-link capacitance of the application discharge circuit shown in Fig. 3, on the basis of above-described embodiment one, the present embodiment also can comprise the 6th resistance R6, be connected with small-signal switch module 100 by the 6th resistance R6 to make accessory power supply VCC, and, in the present embodiment, first power switch pipe Q1, the second power switch pipe Q2 and the 3rd power switch pipe Q3 all select N-channel MOS pipe, and the first resistance R1 is equal with the resistance of the second resistance R2, first electric capacity C1 is equal with the capacitance of the second electric capacity C2, then:
As shown in Figure 3, known in conjunction with the anatomical connectivity relation in above-described embodiment one, the grid of the first N-channel MOS pipe Q1 in the present embodiment is connected with M point, and drain electrode is connected with the 4th resistance Q4, and source electrode is connected with N point and is connected with the drain electrode of the second N-channel MOS pipe Q2 by the 5th resistance R5; And the grid of the second N-channel MOS pipe Q2 is connected with M1 point, source ground.
Further, the drain electrode of the 3rd N-channel MOS pipe Q3 is connected with M1 point, source electrode and ground connection, and grid is connected with accessory power supply VCC by the 6th resistance R6, and the 7th resistance R7 two ends are connected with source electrode one_to_one corresponding with the grid of the 3rd N-channel MOS pipe Q3.
In the present embodiment practical application, the course of work in inverter normal course of operation and after direct current power down can refer to the description of above-described embodiment one appropriate section, and the present embodiment does not repeat them here.
It should be noted that, for the selection of the first power switch pipe Q1 in the present embodiment and the second power switch pipe Q2, except above-mentioned N-channel MOS pipe, can also be NPN type triode or IGBT pipe, annexation and the present embodiment of corresponding discharge circuit are similar, and the utility model is not described in detail in this.
Embodiment three:
With reference to the circuit connection diagram of the another kind of inverter dc-link capacitance discharge circuit specific embodiment shown in Fig. 4, with above-described embodiment two unlike, the small-signal switch module 100 in the present embodiment is isolation optocoupler, and its former limit can be light-emitting diode, secondary can be triode, wherein:
The anode of described light-emitting diode is connected with described accessory power supply VCC by described 6th resistance R6, minus earth; The collector and emitter of described triode is connected one by one with the two ends of described 3rd resistance R3 respectively, and described grounded emitter.
The specific works process of the discharge circuit of the present embodiment see the description of embodiment one appropriate section, can not repeat them here.
Wherein, can select the optocoupler of TLP521 model or PC918 model for the isolation optocoupler in the present embodiment, the application does not do concrete restriction to this.
Known based on above-mentioned analysis, the discharge circuit that the present embodiment provides, when inverter system normally runs, accessory power supply output voltage makes optocoupler conducting, make two power switch pipe control ends not reach the condition of opening and turn off like this, main discharge circuit stops electric discharge, reduces system loss.And after the power down of inverter direct current, can quit work from the accessory power supply of direct current power taking, optocoupler is turned off, the control end of such power switch pipe reaches the condition of opening due to bleeder circuit dividing potential drop, main power device (i.e. the first power switch pipe Q1 and the second power switch pipe Q2) is open-minded, and dc-link capacitance passes through power resistor repid discharge, compared with prior art, substantially reduce discharge time, and meet safety requirement.
It should be noted that, about in the various embodiments described above, the such as relational terms of first, second grade and so on is only used for a device and another device region to separate, and does not require or imply the relation or order that there is any this reality between these devices.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an inverter dc-link capacitance discharge circuit, described inverter dc-link capacitance comprises positive bus-bar electric capacity and the negative busbar electric capacity of series connection, it is characterized in that, described discharge circuit comprises: the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first power switch pipe, the second power switch pipe and small-signal switch module, wherein:
One end of described first resistance is connected with the control end of described first power switch pipe, and the other end is all connected with DC bus positive pole with one end of described 4th resistance, and the other end of described 4th resistance is connected with the input of described first power switch pipe;
The output of described first power switch pipe is connected with the points of common connection of described positive bus-bar electric capacity with described negative busbar electric capacity, and is connected with the input of described second power switch pipe by described 5th resistance;
The control end of described second power switch pipe is connected with the two ends of described 3rd resistance respectively one by one with output, and the output head grounding of described second power switch pipe;
The two ends of described second resistance are connected with the control end of described second power switch pipe one by one with the control end of described first power switch pipe respectively;
Described small-signal switch module and described 3rd resistor coupled in parallel, and be connected with the auxiliary power output end of described inverter;
Described positive bus-bar electric capacity and the ratio of the capacity of negative busbar electric capacity equal the ratio of described first resistance and the resistance of described second resistance.
2. discharge circuit according to claim 1, is characterized in that, described discharge circuit also comprises the 6th resistance, is connected by described 6th resistance to make described accessory power supply with described small-signal switch module.
3. discharge circuit according to claim 2, is characterized in that, described small-signal switch module comprises: the 7th resistance and the 3rd power switch pipe, wherein:
The control end of described 3rd power switch pipe is connected with described accessory power supply by described 6th resistance, and input is connected with the points of common connection of described second resistance with described 3rd resistance, output head grounding;
One end of described 7th resistance is connected with the control end of described 3rd power switch pipe, and the other end is connected with the output of described 3rd power switch pipe.
4. discharge circuit according to claim 2, is characterized in that, described small-signal switch module is specially isolation optocoupler, and the former limit of described isolation optocoupler is light-emitting diode, and secondary is triode, wherein:
The anode of described light-emitting diode is connected with described accessory power supply by described 6th resistance, minus earth;
The collector and emitter of described triode is connected one by one with the two ends of described 3rd resistance respectively, and described grounded emitter.
5. discharge circuit according to claim 3, is characterized in that, described first power switch pipe, described second power switch pipe and described 3rd power switch pipe are all NPN type triode;
Then described control end is the base stage of described NPN type triode, and described input is the collector electrode of described NPN type triode, and described output is the emitter of described NPN type triode.
6. discharge circuit according to claim 3, is characterized in that, described first power switch pipe, described second power switch pipe and described 3rd power switch pipe are all N-channel MOS pipes;
Then described control end is the grid of described N-channel MOS pipe, and described input is the drain electrode of described N-channel MOS pipe, and described output is the source electrode of described N-channel MOS pipe.
7. discharge circuit according to claim 3, is characterized in that, described first power switch pipe, described second power switch pipe and described 3rd power switch pipe are all IGBT pipes;
Then described control end is the grid of described IGBT pipe, and described input is the drain electrode of described IGBT pipe, and described output is the source electrode of described IGBT pipe.
8. discharge circuit according to claim 4, is characterized in that, described isolation optocoupler is specially the optocoupler of TLP521 model.
9. the discharge circuit according to any one of claim 1-8, is characterized in that, described positive bus-bar electric capacity is equal with the capacity of described negative busbar electric capacity, and the resistance of described first resistance equals the resistance of described second resistance.
10. discharge circuit according to claim 9, it is characterized in that, described first resistance, described second resistance, described 3rd resistance, described 4th resistance and described 5th resistance are specifically power resistor or by multiple Chip-R resistance string in series.
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| CN201420663921.1U CN204168176U (en) | 2014-11-06 | 2014-11-06 | A kind of inverter dc-link capacitance discharge circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110871688A (en) * | 2019-11-06 | 2020-03-10 | 北京动力源新能源科技有限责任公司 | Motor controller, motor driving system and new energy automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110871688A (en) * | 2019-11-06 | 2020-03-10 | 北京动力源新能源科技有限责任公司 | Motor controller, motor driving system and new energy automobile |
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