An electric drive and charging system integrated with a charging power factor correction function and a vehicle

Abstract

The application discloses an electric drive and charging system integrated with a charging power factor correction function and a vehicle, relates to the field of charging power factor correction circuit multiplexing technology based on an electric drive system, and discloses the electric drive and charging system integrated with the charging power factor correction function, which comprises an electric drive system circuit and a charger circuit. The electric drive system circuit comprises a direct-current power supply, a bus capacitor, a motor winding, a first phase bridge arm, a second phase bridge arm and a third phase bridge arm. The charger circuit is connected with the motor winding, the three-phase bridge arm and the bus capacitor of the electric drive system circuit, and the electric drive system circuit structure is used to replace the charging power factor correction circuit, so that the vehicle-mounted charger rectifier module circuit is saved, and the technical effect of integrating the vehicle-mounted charger circuit structure is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging power factor correction circuit multiplexing based on an electric drive system, in particular to an electric drive and charging system integrated with charging power factor correction function and a vehicle. BACKGROUND

[0002] Currently, an electric vehicle generally adopts an independently set vehicle-mounted charger circuit topology and electric drive system circuit topology. Since the vehicle-mounted charger circuit topology and the electric drive system circuit topology are independent of each other, they do not affect each other. When the vehicle-mounted charger circuit works, the electric drive system circuit stops working; when the electric drive system circuit works, the vehicle-mounted charger circuit stops working. However, the vehicle-mounted charger is installed on the electric vehicle, so the independent setting mode of the vehicle-mounted charger circuit topology and the electric drive system circuit topology not only increases the volume and weight of the electric vehicle, but also increases the cost of the entire electric vehicle. SUMMARY

[0003] In order to solve at least one aspect of the above technical problems, an embodiment of the present application provides an electric drive and charging system integrated with charging power factor correction function, comprising:

[0004] An electric drive system circuit, the electric drive system circuit comprises a DC / DC power supply, a bus capacitor, a motor winding, a first phase bridge arm, a second phase bridge arm and a third phase bridge arm, the bus capacitor, the first phase bridge arm, the second phase bridge arm and the third phase bridge arm are connected in parallel and connected to the output end of the DC / DC power supply, the motor winding comprises a first winding, a second winding and a third winding, the output end of the first winding is connected between the upper bridge arm and the lower bridge arm of the first phase bridge arm, the output end of the second winding is connected between the upper bridge arm and the lower bridge arm of the second phase bridge arm, and the output end of the third winding is connected between the upper bridge arm and the lower bridge arm of the third phase bridge arm;

[0005] A charger circuit, the charger circuit comprises a first switching circuit, a second switching circuit, a rectifier circuit and a DC / DC power supply, the two ends of the first switching circuit are respectively connected to the center points of the first winding and the second winding, the two ends of the second switching circuit are respectively connected to the center points of the second winding and the third winding, the rectifier circuit comprises a first rectifier diode, a second rectifier diode, a third rectifier diode and a fourth rectifier diode, the anode of the first rectifier diode and the cathode of the third rectifier diode are connected to the positive input of alternating current, the anode of the fourth rectifier diode and the cathode of the second rectifier diode are connected to the negative input of alternating current, the anode of the third rectifier diode and the anode of the second rectifier diode are connected to the center point of the first winding, the cathode of the first rectifier diode and the cathode of the fourth rectifier diode are connected to the center point of the second winding, and the output end of the DC / DC power supply is connected to the bus capacitor, the first phase bridge arm, the second phase bridge arm and the third phase bridge arm.

[0006] Preferably, the upper bridge arm of the first phase bridge arm comprises a first phase upper bridge arm switch and a first phase upper bridge arm diode, the lower bridge arm of the first phase bridge arm comprises a first phase lower bridge arm switch and a first phase lower bridge arm diode, the upper bridge arm of the second phase bridge arm comprises a second phase upper bridge arm switch and a second phase upper bridge arm diode, the lower bridge arm of the second phase bridge arm comprises a second phase lower bridge arm switch and a second phase lower bridge arm diode, the upper bridge arm of the third phase bridge arm comprises a third phase upper bridge arm switch and a third phase upper bridge arm diode, and the lower bridge arm of the third phase bridge arm comprises a third phase lower bridge arm switch and a third phase lower bridge arm diode.

[0007] Preferably, the first phase upper bridge arm switch and the first phase lower bridge arm switch are triodes.

[0008] Preferably, the second phase bridge arm and the third phase bridge arm adopt the same circuit topology as the first phase bridge arm.

[0009] Preferably, the first switch circuit comprises a first switch, and the second switch circuit comprises a second switch, and the first switch and the second switch are turned off when the charging machine circuit is charging.

[0010] In another aspect, a vehicle is provided, comprising the integrated charging power factor correction function electric drive and charging system as described in any one of the preceding aspects.

[0011] The integrated charging power factor correction function electric drive and charging system of the embodiments of the present application has the following technical effects: when the vehicle is being charged by alternating current, the power factor correction function is realized by multiplexing the electric drive system part circuit, and the rectifier module circuit of the vehicle-mounted charging machine can be saved. In the structure of the vehicle-mounted electric drive system, the power factor correction module function of the vehicle-mounted charging machine is realized by using the electric drive system topology circuit, the structure is multiplexed, the material cost is saved, and the charging function integration of the electric drive system is realized. BRIEF DESCRIPTION OF DRAWINGS

[0012] For better understanding of the above and other objects, features, advantages and functions of the present application, reference can be made to the embodiments shown in the drawings. The same reference signs in the drawings refer to the same parts. Those skilled in the art should understand that the drawings are intended to illustrate the preferred embodiments of the present application, and have no limiting effect on the scope of the present application, and the various parts in the drawings are not drawn to scale.

[0013] Figure 1 A structure schematic diagram of a multiplexed power factor correction circuit is shown;

[0014] Figure 2 A structure schematic diagram of an electric drive system circuit is shown;

[0015] Figure 3 A structure schematic diagram of a vehicle-mounted charging machine circuit with an independent power factor correction circuit is shown;

[0016] Figure 4 A current flow diagram showing the AC positive half cycle bridge arm conduction of a multiplexed power factor correction circuit is shown.

[0017] Figure 5 A current flow diagram showing the AC positive half cycle bridge arm conduction of a multiplexed power factor correction circuit is shown. DETAILED DESCRIPTION

[0018] Exemplary embodiments of the present disclosure are described herein with reference to the accompanying drawings, which are incorporated in this specification, wherein the various details of the embodiments of the present disclosure are set forth in order to provide an understanding of the present disclosure. It will be appreciated that the embodiments described herein are merely exemplary and that a person of ordinary skill in the art will be able to make various changes and modifications without departing from the spirit and scope of the present disclosure. Also, for the purpose of clarity and a concise description, the description below omits descriptions of well-known functions and structures.

[0019] As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or variations thereof, are intended to cover a non-exclusive inclusion. The term "or" is intended to mean "and / or" unless otherwise indicated. The term "based on" means "based, at least in part, on." The terms "one example embodiment" and "an example embodiment" mean "at least one example embodiment." The term "another embodiment" means "at least one additional embodiment." The terms "a first," "a second," etc. can refer to different or the same objects. Other explicitly and implicitly recited definitions can also be useful in the description.

[0020] To at least partially address the above-mentioned problems and one or more of other potential problems, some embodiments of the present disclosure provide an integrated charging power factor correction function electric drive and charging system, including: an electric drive system circuit and a charger circuit, the electric drive system circuit including a DC / DC power supply, a bus capacitor, a motor winding, a first phase bridge arm, a second phase bridge arm, and a third phase bridge arm, the bus capacitor, the first phase bridge arm, the second phase bridge arm, and the third phase bridge arm being connected in parallel and connected at the output end of the DC / DC power supply, the motor winding including a first winding, a second winding, and a third winding, the output end of the first winding being connected between the upper bridge arm and the lower bridge arm of the first phase bridge arm, the output end of the second winding being connected between the upper bridge arm and the lower bridge arm of the second phase bridge arm, and the output end of the third winding being connected between the upper bridge arm and the lower bridge arm of the third phase bridge arm; the charger circuit including a first switching circuit, a second switching circuit, a rectifier circuit, and a DC / DC power supply, the two ends of the first switching circuit being connected to the center points of the first winding and the second winding, respectively, the two ends of the second switching circuit being connected to the center points of the second winding and the third winding, respectively, the rectifier circuit including a first rectifier diode, a second rectifier diode, a third rectifier diode, and a fourth rectifier diode, the anode of the first rectifier diode and the cathode of the third rectifier diode being connected to the positive input of the alternating current, the anode of the fourth rectifier diode and the cathode of the second rectifier diode being connected to the negative input of the alternating current, the anode of the third rectifier diode and the anode of the second rectifier diode being connected to the center point of the first winding, the cathode of the first rectifier diode and the cathode of the fourth rectifier diode being connected to the center point of the second winding, and the output end of the DC / DC power supply being connected to the bus capacitor, the first phase bridge arm, the second phase bridge arm, and the third phase bridge arm.

[0021] Specifically, as shown in Figure 2 , the bus capacitor, the first phase bridge arm, the second phase bridge arm, and the third phase bridge arm of the electric drive system circuit are used to connect the motor winding and the direct current power supply, realizing the transmission of electric energy between the direct current power supply and the motor winding, and at the same time, through the cooperation of the bus capacitor and the bridge arms, the power supply connection can be quickly cut off through the bridge arms in an emergency brake, and the safety protection is realized by discharging the bus capacitor.

[0022] The on-board charger circuit is used to realize the charging of the on-board power supply. The on-board charger circuit with an independent power factor correction module (PFC module) is as shown in Figure 3 , the power factor correction module includes a PFC module boost inductor L11, a PFC module boost inductor L12, a PFC module diode D16, a PFC module diode D15, a PFC module capacitor, a PFC module switch K12, and a PFC module switch K11. The rectifier circuit of the charger circuit includes a third rectifier diode D13, a first rectifier diode D11, a second rectifier diode D12, and a fourth rectifier diode D14.

[0023] AsFigure 3 As shown, the positive pole of the first rectifier diode D11 and the negative pole of the third rectifier diode D13 are connected with the positive pole of the AC input, the positive pole of the fourth rectifier diode D14 and the negative pole of the second rectifier diode D12 are connected with the negative pole of the AC input, and the positive pole of the third rectifier diode D13 and the positive pole of the second rectifier diode D12 are connected with the negative pole of the DC / DC power supply.

[0024] The PFC module boost inductor L11 and the PFC module diode D15 are connected in series in the first boost circuit of the PFC module, and the PFC module boost inductor L12 and the PFC module diode D16 are connected in series in the second boost circuit of the PFC module. The first boost circuit and the second boost circuit of the PFC module are connected in parallel, and the negative pole of the first rectifier diode D11 and the negative pole of the fourth rectifier diode D14 are respectively connected at both ends of the circuit and the positive pole of the DC / DC power supply.

[0025] The PFC module capacitor is connected at both ends with the positive pole and the negative pole of the DC / DC power supply. The PFC module switch K12 is connected with the first boost circuit and the negative pole of the DC / DC power supply, and the connection point of the PFC module switch K12 with the first boost circuit is at the positive pole of the PFC module diode D15. The PFC module switch K11 is connected with the second boost circuit and the negative pole of the DC / DC power supply, and the connection point of the PFC module switch K11 with the second boost circuit is at the positive pole of the PFC module diode D16.

[0026] In the present embodiment, as shown in Figure 1 The charger circuit includes a first switch circuit, a second switch circuit, a rectifier circuit and a DC / DC power supply. The first switch circuit is connected at both ends with the center points of the first winding U and the second winding V, and the second switch circuit is connected at both ends with the center points of the second winding U and the third winding W. The connection switching of the motor windings is realized by setting the first switch circuit and the second switch circuit. The DC / DC power supply of the charger circuit is connected with the bus capacitor, the first phase bridge arm, the second phase bridge arm and the third phase bridge arm, realizing the replacement of the PFC module boost inductor L11, the PFC module boost inductor L12, the PFC module diode D16, the PFC module diode D15, the PFC module capacitor, the PFC module switch K12 and the PFC module switch K11 in the above-mentioned PFC module.

[0027] In some embodiments, the upper bridge arm of the first phase bridge arm comprises a first phase upper bridge arm switch and a first phase upper bridge arm diode D1, the lower bridge arm of the first phase bridge arm comprises a first phase lower bridge arm switch 10 and a first phase lower bridge arm diode D4, the upper bridge arm of the second phase bridge arm comprises a second phase upper bridge arm switch and a second phase upper bridge arm diode D3, the lower bridge arm of the second phase bridge arm comprises a second phase lower bridge arm switch and a second phase lower bridge arm diode D6, the upper bridge arm of the third phase bridge arm comprises a third phase upper bridge arm switch and a third phase upper bridge arm diode D5, and the lower bridge arm of the third phase bridge arm comprises a third phase lower bridge arm switch and a third phase lower bridge arm diode D2.

[0028] Specifically, as shown in Figure 2 , the first phase upper bridge arm switch and the first phase lower bridge arm switch are implemented by a triode.

[0029] The first phase upper bridge arm switch is implemented by a triode K1, and the triode K1 and the diode D1 constitute the first phase upper bridge arm; the first phase lower bridge arm switch is implemented by a triode K4, and the triode K4 and the diode D4 constitute the first phase lower bridge arm.

[0030] The second phase bridge arm and the third phase bridge arm adopt the same circuit topology structure as the first phase bridge arm.

[0031] Specifically, as shown in Figure 1 and Figure 2 , the second phase upper bridge arm switch is implemented by a triode K3, and the triode K3 and the diode D3 constitute the second phase upper bridge arm; the second phase lower bridge arm switch is implemented by a triode K4, and the triode K4 and the diode D4 constitute the second phase lower bridge arm.

[0032] The third phase upper bridge arm switch is implemented by a triode K5, and the triode K5 and the diode D5 constitute the third phase upper bridge arm; the third phase lower bridge arm switch is implemented by a triode K6, and the triode K6 and the diode D6 constitute the third phase lower bridge arm.

[0033] In some embodiments, the first switch circuit comprises a first switch, and the second switch circuit comprises a second switch, and the first switch and the second switch are closed when the charger circuit is charging.

[0034] Specifically, as shown in Figure 1 , the first switch circuit and the second switch circuit are respectively implemented by a first switch S1 and a second switch S2 to turn on and turn off the center points of the first winding U, the second winding V and the third winding W.

[0035] The current flow direction of the working state of the multiplex power factor correction circuit is as shown in Figure 4 and Figure 5 .

[0036] On the other hand, a vehicle comprising an integrated charging power factor correction function electric drive and charging system as claimed in any one of the preceding claims is provided.

[0037] Having described above several embodiments of the disclosure, any modifications and variations that fall within the scope of the described embodiments are also contemplated. It is also contemplated that the application covered by the claims extends to any alternative combination of claim elements not specifically disclosed. It is intended that the appended claims cover all such modifications and variations as falling within the scope of the described embodiments.

Claims

1. An integrated charging power factor correction function electric drive and charging system, characterized in that, The application relates to an integrated charging power factor correction function electric drive and charging system. The electric drive system circuit comprises a DC / DC power supply, a bus capacitor, motor windings, a first phase bridge arm, a second phase bridge arm and a third phase bridge arm, the bus capacitor, the first phase bridge arm, the second phase bridge arm and the third phase bridge arm are connected in parallel and are connected at the output end of the DC / DC power supply, the motor windings comprise a first winding, a second winding and a third winding, the output end of the first winding is connected between the upper bridge arm and the lower bridge arm of the first phase bridge arm, the output end of the second winding is connected between the upper bridge arm and the lower bridge arm of the second phase bridge arm, and the output end of the third winding is connected between the upper bridge arm and the lower bridge arm of the third phase bridge arm. The charging machine circuit comprises a first switch circuit, a second switch circuit, a rectifier circuit and a DC / DC power supply, the two ends of the first switch circuit are connected to the center points of the first winding and the second winding respectively, the two ends of the second switch circuit are connected to the center points of the second winding and the third winding respectively, the rectifier circuit comprises a first rectifier diode, a second rectifier diode, a third rectifier diode and a fourth rectifier diode, the anode of the first rectifier diode and the cathode of the third rectifier diode are connected to the AC positive input, the anode of the fourth rectifier diode and the cathode of the second rectifier diode are connected to the AC negative input, the anode of the third rectifier diode and the anode of the second rectifier diode are connected to the center point of the first winding, the cathode of the first rectifier diode and the cathode of the fourth rectifier diode are connected to the center point of the second winding, and the output end of the DC / DC power supply is connected to the bus capacitor, the first phase bridge arm, the second phase bridge arm and the third phase bridge arm.

2. The system of claim 1, wherein, The upper bridge arm of the first phase bridge arm comprises a first phase upper bridge arm switch and a first phase upper bridge arm diode, the lower bridge arm of the first phase bridge arm comprises a first phase lower bridge arm switch and a first phase lower bridge arm diode, the upper bridge arm of the second phase bridge arm comprises a second phase upper bridge arm switch and a second phase upper bridge arm diode, the lower bridge arm of the second phase bridge arm comprises a second phase lower bridge arm switch and a second phase lower bridge arm diode, the upper bridge arm of the third phase bridge arm comprises a third phase upper bridge arm switch and a third phase upper bridge arm diode, and the lower bridge arm of the third phase bridge arm comprises a third phase lower bridge arm switch and a third phase lower bridge arm diode.

3. The system of claim 2, wherein, The first phase upper bridge arm switch and the first phase lower bridge arm switch are triodes.

4. The system of claim 3, wherein, The second phase bridge arm and the third phase bridge arm adopt the same circuit topology structure as the first phase bridge arm.

5. A vehicle characterized by comprising: The application relates to an integrated charging power factor correction function electric drive and charging system.

Images