CN216507932U

CN216507932U - Motor winding and charger integrated structure

Info

Publication number: CN216507932U
Application number: CN202122362034.3U
Authority: CN
Inventors: 吴奎; 曹艺
Original assignee: ZHEJIANG FOUNDER MOTOR CO Ltd
Current assignee: ZHEJIANG FOUNDER MOTOR CO Ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-05-13
Anticipated expiration: 2031-09-28

Abstract

The utility model relates to an integrated structure of a motor winding and a charger, which comprises an alternating current power supply, a high-voltage storage battery, an inverter, a charging circuit and a motor, wherein the motor is connected to the high-voltage storage battery through the inverter, the charging circuit comprises a first bridge arm and a second bridge arm which are respectively bridged between two poles of the high-voltage storage battery, the first bridge arm and the second bridge arm are connected in parallel, the first bridge arm is two switching tubes S1 and S2 which are mutually connected in series, the second bridge arm is two diodes D1 and D2 which are mutually connected in series, one pole of the alternating current power supply is connected to any two windings of the motor, the two windings are mutually connected in series to form an inductor L1, the inductor L1 is connected between the two switching tubes S1 and S2, and the other pole of the alternating current power supply is connected between the two diodes D1 and D2. The technical scheme of the utility model has the advantages that the discrete parts are integrated, so that the integration level of the key parts is higher, the power density of the new energy automobile parts is improved, and the total cost of the parts is reduced.

Description

Motor winding and charger integrated structure

Technical Field

The utility model relates to the technical field of electric automobile charging, in particular to an integrated structure of a motor winding and a charger.

Background

On a new energy automobile, a motor driving system and a vehicle-mounted charging system are two independent systems. A motor drive system: the vehicle-mounted power generation system mainly comprises a high-voltage storage battery, an inverter and a driving motor, and is used for providing power for a vehicle; vehicle-mounted charging system: the charging device mainly comprises a charger and a high-voltage storage battery, and is used for charging the storage battery by a power grid.

When the motor driving system works, the vehicle-mounted charging system does not work, the energy of the storage battery converts direct current into three-phase alternating current through the inverter, and mechanical torque is provided for the motor, so that the motor is driven, and power is provided for a vehicle. When the vehicle-mounted charger system works, the motor driving system does not work, and the voltage of a power grid passes through the charger to convert alternating current into direct current to charge the high-voltage storage battery.

At present, two systems of a new energy automobile generally work independently in a time-sharing mode, and the two systems do not interfere with each other. However, as the new energy automobile has higher requirements on the power density of the parts and is more sensitive to the cost, the demands for reducing the volume of the parts, increasing the power density of the parts and reducing the cost of the parts are more urgent.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide an integrated structure of a motor winding and a charger, which can improve the integration level and reduce the cost.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the motor winding and charger integrated structure comprises an alternating current power supply, a high-voltage storage battery, an inverter and a motor, wherein the motor is connected to the high-voltage storage battery through the inverter, a circuit breaker K1 is connected between the inverter and the high-voltage storage battery, the charging circuit comprises a first bridge arm and a second bridge arm, the first bridge arm and the second bridge arm are respectively bridged between two poles of the high-voltage storage battery, the first bridge arm and the second bridge arm are connected in parallel, the first bridge arm is two switching tubes S1 and S2 which are connected in series, the second bridge arm is two diodes D1 and D2 which are connected in series, one pole of the alternating current power supply is connected to any two windings of the motor, the two windings are connected in series to form an inductor L1, the inductor L1 is connected between the two switching tubes S1 and S2, and the other pole of the alternating current power supply is connected between the two diodes D1 and D2.

As a preferable scheme: and a bus capacitor C and an isolation DC/DC are also connected between the two poles of the high-voltage storage battery in a bridging manner.

As a preferable scheme: the inverter is composed of six switching tubes and comprises three bridge arms which are connected in parallel, and each bridge arm is formed by connecting an upper switching tube and a lower switching tube in series.

As a preferable scheme: the switch tube is IGBT, SiC or MOSFET.

As a preferable scheme: the winding of the motor adopts a star connection method.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model integrates a charger and a motor winding, wherein the charger adopts a bridgeless PFC + DCDC architecture. The scheme of the utility model has the advantages that the motor winding replaces the bridgeless PFC inductor L1 at the input end of the charger, and the weight and the volume of the charger can be reduced, so that the cost of the charger is reduced, and the power density is improved.

According to the utility model, the live wire input of the charger can be shared with the three-phase output terminal of the controller, so that the integrated design of the charger and the inverter is better realized, and the power density is improved.

The technical scheme of the utility model has the advantages that the discrete parts are integrated, so that the integration level of the key parts is higher, the power density of the new energy automobile parts is improved, and the total cost of the parts is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic diagram of the overall circuit structure of the present invention;

FIG. 2 is a schematic diagram of the current flow during the positive half cycle of the AC power supply of the present invention;

FIG. 3 is a schematic diagram of the current flow during the negative half cycle of the AC power supply of the present invention.

The labels in the figures are: 1. an alternating current power supply; 2. a motor; 3. an inverter; 4. a high-voltage battery.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, elements, and/or combinations thereof, unless the context clearly indicates otherwise.

Further, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. 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 present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The utility model will be further illustrated with reference to the following examples and drawings:

the integrated structure of the motor winding and the charger shown in fig. 1 comprises an alternating current power supply 1, a high-voltage storage battery 4, an inverter 3 and a motor 2, wherein the motor 2 is connected to the high-voltage storage battery 4 through the inverter 3, and a circuit breaker K1 is connected between the inverter 3 and the high-voltage storage battery 4, and the charging circuit is also included, the charging circuit comprises a first bridge arm and a second bridge arm which are respectively bridged between two poles of the high-voltage storage battery 4, the first bridge arm and the second bridge arm are connected in parallel, the first bridge arm is two switching tubes S1 and S2 which are connected in series, the second bridge arm is two diodes D1 and D2 which are connected in series, one pole of the alternating current power supply 1 is connected to any two windings of the motor 2, and the two windings are mutually connected in series to form an inductor L1, an inductor L1 is connected between two switching tubes S1 and S2, and the other pole of the alternating current power supply 1 is connected between two diodes D1 and D2. And a bus capacitor C and an isolation DC/DC are connected between the two poles of the high-voltage storage battery 4 in a bridging manner.

The inverter 3 is composed of six switching tubes and comprises three bridge arms which are connected in parallel, and each bridge arm is formed by connecting an upper switching tube and a lower switching tube in series. The switch tube is IGBT, SiC or MOSFET. The winding of the motor 2 adopts a star connection method.

Generally, a motor drive system is mainly composed of a high-voltage battery, an inverter, and a motor; the vehicle-mounted charging system mainly comprises an alternating current power grid, a charger and a high-voltage storage battery. The motor driving system and the vehicle-mounted charging system are two independent systems, but some units in the two systems, such as motor windings, can be multiplexed in different systems.

At present, the working principle of a motor driving system and a vehicle-mounted charging system on a new energy automobile is as follows:

when the circuit breaker K1 is closed and the circuit breaker K2 is opened, the system works in an inversion state, and the high-voltage storage battery drives the motor through the inverter; when the circuit breaker K1 is opened and the circuit breaker K2 is closed, the system works in a charging state, and the alternating current power supply charges the high-voltage storage battery through the charger.

Charger: the charger is composed of a bridgeless PFC (including L1, S1, S2, D1 and D2), a bus capacitor C and an isolation DCDC. The bridgeless PFC topological structure mainly comprises the following parts: the input side inductor L1 is also referred to as a PFC inductor. The two switching tubes are upper and lower tubes located on the same bridge arm, the types of the switching tubes can be power devices such as MOSFET, IGBT, SiC and the like, and the two diodes are D1 and D2, and the two diodes are upper and lower tubes located on the same bridge arm.

The utility model integrates the motor winding with the charger, and the new proposal has the advantages that the motor winding replaces the bridgeless PFC inductance L1 at the input end of the charger, thereby reducing the weight and the volume of the charger, further reducing the cost of the charger and improving the power density.

As can be seen from fig. 1, the bridgeless PFC inductor L1 in the original charger has been replaced by the motor winding, so that an inductor is omitted, and the other structures remain unchanged.

The solution in this patent is focused on the bridgeless PFC part of the charger, that is, the original inductance L1 is replaced by the motor winding (inductance attribute), so that one magnetic element L1 can be saved, but the basic function of the bridgeless PFC is not changed. The basic working principle of bridgeless PFC is as follows:

as shown in fig. 2, when the alternating current source (AC) is positive half cycle: the current flows through the inductor L1, the switch tube S1, the capacitor C and the diode D2, and returns to the negative electrode of the alternating current power supply.

As shown in fig. 3, when the alternating current source (AC) is negative half cycle: the current flows through the diode D1, the capacitor C, the switch tube S2, the inductor L1 and returns to the anode of the alternating current power supply.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 utility model. In this specification, 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.

Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. Motor winding and machine integrated configuration that charges, including alternating current power supply (1), high voltage battery (4), inverter (3) and motor (2), motor (2) are connected to high voltage battery (4) through inverter (3), and are connected with circuit breaker K1, its characterized in that between inverter (3) and high voltage battery (4): the charging circuit comprises a first bridge arm and a second bridge arm which are respectively bridged between two poles of a high-voltage storage battery (4), the first bridge arm and the second bridge arm are connected in parallel, the first bridge arm is two switching tubes S1 and S2 which are connected in series, the second bridge arm is two diodes D1 and D2 which are connected in series, one pole of the alternating current power supply (1) is connected to any two windings of the motor (2), the two windings are connected in series to form an inductor L1, the inductor L1 is connected between the two switching tubes S1 and S2, and the other pole of the alternating current power supply (1) is connected between the two diodes D1 and D2.

2. The motor winding and charger integrated structure according to claim 1, characterized in that: and a bus capacitor C and an isolation DC/DC are also connected between the two poles of the high-voltage storage battery (4) in a bridging manner.

3. The motor winding and charger integrated structure according to claim 1, characterized in that: the inverter (3) is composed of six switching tubes and comprises three bridge arms which are connected in parallel, and each bridge arm is formed by connecting an upper switching tube and a lower switching tube in series.

4. The motor winding and charger integrated structure according to claim 3, characterized in that: the switch tube is IGBT, SiC or MOSFET.

5. The motor winding and charger integrated structure according to claim 1, characterized in that: the winding of the motor (2) adopts a star connection method.