Driving motor and automobile
By using three-phase winding structure and switching unit technology in the drive motor to switch the winding connection relationship, the problems of high energy consumption and large temperature rise at high speed are solved, and efficient operation at different speeds is achieved.
Patent Information
- Application Number
- CN202421809493.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The existing driving motors have increased proportion of back electromotive force at high speed, resulting in higher energy consumption, and the variable winding technology has a faster temperature rise and reduced efficiency at high speed.
The three-phase winding structure is adopted, and the connection relationship between the windings is switched through the first winding switching unit and the second winding switching unit. The windings are connected in series at low speed to improve power, and the windings are connected in parallel at high speed to reduce resistance and temperature rise.
Improve power at low speeds and reduce energy consumption; reduce the temperature rise and energy consumption of the motor at high speeds and improve overall efficiency.
Smart Images
Figure CN222996456U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of motors, and particularly to a drive motor and an automobile. Background Art
[0002] With the development of the electric vehicle industry, higher requirements are put forward for the performance of drive motors. Especially for the current customers' demand for high-speed cruising of electric vehicles, there are higher requirements for the high-speed efficiency of drive motors.
[0003] The stator of a commonly used drive motor adopts a single-winding structure. The proportion of the back electromotive force of the drive motor is increasing, resulting in higher energy consumption of electric vehicles at high speeds than at medium and low speeds. Therefore, in order to reduce the driving force and reduce the back electromotive force, a variable winding technology is introduced. However, the current variable winding technology only considers the access of a group of low-turn windings at high speeds. Under the same current, the temperature rise is relatively fast and the efficiency is reduced. Summary of the Utility Model
[0004] In view of the above-mentioned disadvantages of the prior art, this application provides a drive motor and an automobile to solve at least one defect in the prior art.
[0005] To achieve the above and other purposes, this application provides a drive motor, which includes:
[0006] A three-phase winding, each phase winding in the three-phase winding includes a first winding unit, a second winding unit, a first winding switching unit and a second winding switching unit, and the first winding unit includes at least two windings;
[0007] The first winding switching unit is electrically connected to the first winding unit and is used to switch the connection relationship between at least two windings in the first winding unit, and the connection relationship includes series connection and parallel connection;
[0008] The second winding switching unit is electrically connected to the second winding unit and is used to switch the connection state between the second winding unit and the first winding unit, and the connection state includes series connection and non-connection.
[0009] In an embodiment of the present utility model, the first winding unit includes: a first winding and a second winding, and the connection relationship between the first winding and the second winding is switched through the first winding switching unit.
[0010] In an embodiment of the present utility model, the first winding switching unit includes: a first switching switch, a second switching switch, a third switching switch, and a fourth switching switch; the first switching switch, the first winding, the third switching switch, the second winding, and the fourth switching switch are connected in sequence, and when the first switching switch, the third switching switch, and the fourth switching switch are all closed, the first switching switch, the first winding, the third switching switch, the second winding, and the fourth switching switch form a loop; a first node is formed by connecting the first winding and the third switching switch, a second node is formed by connecting the fourth switching switch and the second winding, and the second switching switch is connected between the first node and the second node.
[0011] In an embodiment of the present utility model, the second winding unit includes at least one third winding; when the second winding unit includes two windings, the two windings are connected in series or in parallel.
[0012] In an embodiment of the present utility model, the second winding unit includes at least three third windings, and the connection relationship between the at least three third windings includes series connection, parallel connection, or a hybrid connection of series and parallel.
[0013] In an embodiment of the present utility model, the second winding switching unit includes a fifth switching switch connected in parallel across the two ends of the second winding unit.
[0014] In an embodiment of the present utility model, the first switching switch, the second switching switch, the third switching switch, the fourth switching switch, and the fifth switching switch are each one of a contactor, a relay, a power switch, and any combination thereof.
[0015] In an embodiment of the present utility model, the drive motor further includes:
[0016] A motor controller for controlling the switching states of the switching switches in the first switch switching unit and the second switch switching unit.
[0017] In an embodiment of the present utility model, the series connection includes: all of the at least two windings are connected in series or all of the at least three third windings are connected in series; the parallel connection includes: all of the at least two windings are connected in parallel or all of the at least three third windings are connected in parallel; the hybrid connection includes: a series part and a parallel part, the series part includes third windings connected in series, and the parallel part includes third windings connected in parallel.
[0018] To achieve the above and other objects, the present application provides an automobile including the drive motor described above.
[0019] Advantages of the present application:
[0020] A driving motor of the present application includes: a three-phase winding, each phase winding in the three-phase winding includes a first winding unit, a second winding unit, a first winding switching unit and a second winding switching unit, and the first winding unit includes at least two windings; the first winding switching unit is used to switch the connection relationship between at least two windings in the first winding unit, and the connection relationship includes series connection and parallel connection; the second winding switching unit is used to switch the connection state between the second winding unit and the first winding unit, and the connection state includes series connection and non-connection. In the present application, at low speed, by connecting at least two windings in series and connecting the second winding unit to the entire winding to increase the number of turns of the stator winding, the power performance is improved; at the same time, at high speed, at least two windings are connected in parallel, and the second winding unit is not connected to the entire winding to reduce the resistance value and temperature rise, thereby improving the efficiency of the motor.
[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. Brief Description of the Drawings
[0022] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with the present application, and are used together with the specification to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:
[0023] Figure 1 It is a schematic diagram of the driving motor according to an embodiment of the present application. Detailed Embodiments
[0024] The following uses specific specific examples to illustrate the embodiments of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.
[0025] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. Therefore, only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.
[0026] Although terms such as "first", "second", "A", and "B" may be used herein to describe various elements, these elements should not be limited by these terms and are only used to distinguish one element from another. For example, without departing from the scope of the following technology, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element. The term "and / or" includes combinations of multiple related items or any of the multiple related items.
[0027] As used herein, unless the context otherwise indicates, the singular form is also intended to include the plural form. It will be understood that the term "comprising" means the presence of the described features, quantities, steps, operations, elements, or combinations thereof, but does not exclude the presence or addition of one or more other features, quantities, steps, operations, elements, components, or combinations thereof.
[0028] Before the detailed description, it is intended to clarify that the division of components in this specification is only based on the main functions of each component. That is, two or more of the following-described components may be combined into one component, or may be divided into two or more components according to more detailed functions. In addition to the main functions of the components, each of the following-described components may also perform some or all of the functions of other components, and some of the main functions of each component may be specifically performed by other components.
[0029] Please refer to Figure 1 , Figure 1 A drive motor according to an embodiment of the present application, the drive motor comprising:
[0030] A three-phase winding, each phase winding of the three-phase winding includes a first winding unit 110, a second winding unit 120, a first winding switching unit, and a second winding switching unit, and the first winding unit includes at least two windings;
[0031] The first winding switching unit is electrically connected to the first winding unit and is used to switch the connection relationship between at least two windings in the first winding unit, and the connection relationship includes series connection and parallel connection;
[0032] The second winding switching unit is electrically connected to the second winding unit and is used to switch the connection state between the second winding unit and the first winding unit, and the connection state includes series connection and non-connection.
[0033] It should be noted that series connection includes: all at least two windings are connected in series; parallel connection includes: all at least two windings are connected in parallel.
[0034] It should be noted that in this embodiment, as Figure 1As shown in the figure, the three-phase winding includes an A-phase winding, a B-phase winding, and a C-phase winding. The A-phase winding, B-phase winding, and C-phase winding have the same structure. The following will explain each corresponding winding in detail.
[0035] It should be noted that Figure 1 the winding switching unit in
[0036] Please refer to Figure 1 , taking the A-phase winding as an example. The A-phase winding includes a first winding unit 110 and a second winding unit 120. The first winding unit includes: a first winding L1 and a second winding L2. The connection relationship between the first winding L1 and the second winding L2 is switched by the first winding switching unit.
[0037] The first winding switching unit includes: a first switching switch S1, a second switching switch S2, a third switching switch S3, and a fourth switching switch S4; the first switching switch S1 includes a first end and a second end, the second switching switch S2 includes a third end and a fourth end, the third switching switch S3 includes a fifth end and a sixth end, the fourth switching switch S4 includes a seventh end and an eighth end. The second end of the first switching switch S1 is connected to one end of the first winding L1. The other end of the first winding L1 is connected to the third end of the third switching switch S3 to form a first node M. The sixth end of the third switching switch S3 is connected to one end of the second winding L2. The other end of the second winding L2 is connected to the eighth end of the fourth switching switch S4 to form a second node N. The seventh end of the fourth switching switch S4 is connected to the first end of the first switching switch S1. The third end of the second switching switch S2 is connected to the second node N. The fourth end of the second switching switch S2 is connected to the first node M; the first switching switch S1, the first winding L1, the third switching switch S3, the second winding L2, and the fourth switching switch S4 are connected in sequence, and when the first switching switch S1, the third switching switch S3, and the fourth switching switch S4 are all closed, the first switching switch S1, the first winding L1, the third switching switch S3, the second winding L2, and the fourth switching switch S4 form a loop.
[0038] It should be noted that the first winding switching unit may include multiple switching switches. By changing the switch states of each switching switch, the connection relationship of one or more windings in the first winding unit can be changed, such as series connection relationship and parallel connection switch. Specifically, when the first switching switch S1 and the second switching switch S2 are closed, and the third switching switch S3 and the fourth switching switch S4 are open, at this time, the first winding L1 and the second winding L2 are connected in series; when the first switching switch S1, the third switching switch S3, and the fourth switching switch S4 are closed, and the second switching switch S2 is open, the first winding L1 and the second winding L2 are connected in parallel.
[0039] In the embodiment of the present application, still taking the A-phase winding as an example, the second winding unit includes at least one third winding L3. When the second winding unit includes one winding, the winding is directly connected to the circuit according to the corresponding connection relationship; when the second winding unit includes two windings, the windings are connected in series or in parallel and then connected to the circuit according to the corresponding connection relationship; when the third winding L3 includes at least three windings, at least three windings can be connected in series, in parallel or in a combination of series and parallel connections. Among them, the series connection includes: all at least three windings are connected in series; the parallel connection includes: all at least three windings are connected in parallel; the mixed connection includes: a series part and a parallel part. The series part includes the third windings connected in series, and the parallel part includes the third windings connected in parallel. It can be connected in series first and then the series part is connected in parallel, or connected in parallel first and then the parallel part is connected in series.
[0040] It should be noted that the point where the first switching switch S1 is connected to the fourth switching switch S4 is denoted as point X, and the connection point of the third winding L3 and the fifth switching switch S5 that is not connected to the first winding unit is denoted as point X1. The A-phase winding is connected to other circuit modules with point X and point X1 as the connection points.
[0041] In the embodiment of the present application, the second winding switching unit includes a fifth switching switch S5 connected in parallel across the two ends of the second winding unit. The connection state between the first winding unit and the second winding unit can be changed by the switching state of the fifth switching switch S5. Taking the second winding unit having one winding as an example. As Figure 1 shown, the second winding unit in the A-phase winding includes a third winding L3, and the fifth switching switch S5 is connected in parallel across the two ends of the third winding L3. When the fifth switching switch S5 is in the closed state, the third winding L3 is short-circuited, and the current flows through the fifth switching switch S5. At this time, the third winding L3 is not connected to the loop; when the fifth switching switch S5 is in the open state, the current flows through the third winding L3, and the first winding unit 110 and the second winding unit 120 are connected in series.
[0042] Please refer to Figure 1 , for the B-phase winding, the first winding unit of the B-phase winding includes a fourth winding L4 and a fifth winding L5, the second winding unit includes a sixth winding L6, the first winding switching unit includes switching switches for controlling the connection relationship of the fourth winding L4 and the fifth winding L5, including a sixth switching switch S6, a seventh switching switch S7, an eighth switching switch S8, and a ninth switching switch S9, and the second winding switching unit includes: a tenth switching switch S10;
[0043] The sixth switching switch S6 includes a first end and a second end, the seventh switching switch S7 includes a third end and a fourth end, the eighth switching switch S8 includes a fifth end and a sixth end, the ninth switching switch S9 includes a seventh end and an eighth end. The second end of the sixth switching switch S6 is connected to one end of the fourth winding L4, and the other end of the fourth winding L4 is connected to the fifth end of the eighth switching switch S8 to form a first node. The sixth end of the eighth switching switch S8 is connected to one end of the fifth winding L5, and the other end of the fifth winding L5 is connected to the eighth end of the ninth switching switch S9 to form a second node. The seventh end of the ninth switching switch S9 is connected to the first end of the sixth switching switch S6, the third end of the seventh switching switch S7 is connected to the second node, and the fourth end of the seventh switching switch S7 is connected to the first node;
[0044] The sixth switching switch S6, the fourth winding L4, the eighth switching switch S8, the fifth winding L5, and the ninth switching switch S9 are connected in sequence, and when the sixth switching switch S6, the seventh switching switch S7, and the eighth switching switch S8 are all closed, the sixth switching switch S6, the fourth winding L4, the eighth switching switch S8, the fifth winding L5, and the ninth switching switch S9 form a loop.
[0045] It should be noted that the connection point between the sixth switching switch S6 and the ninth switching switch S9 is denoted as point Y, and the connection point between the sixth winding L6 and the tenth switching switch S10 that is not connected to the first winding unit is denoted as point Y1. The B-phase winding is connected to other circuit modules with point Y and point Y1 as the connection points.
[0046] Please refer to Figure 1 , for the C-phase winding, the first winding unit of the C-phase winding includes the seventh winding L7 and the eighth winding L8, the second winding unit includes the ninth winding L9, the first winding switching unit includes switching switches for controlling the connection relationship between the seventh winding L7 and the eighth winding L8, including the eleventh switching switch S11, the twelfth switching switch S12, the thirteenth switching switch S13, and the fourteenth switching switch S14, and the second winding switching unit includes: the fifteenth switching switch S15;
[0047] The eleventh switching switch S11 includes a first end and a second end, the twelfth switching switch S12 includes a third end and a fourth end, the thirteenth switching switch S13 includes a fifth end and a sixth end, the fourteenth switching switch S14 includes a seventh end and an eighth end. The second end of the eleventh switching switch S11 is connected to one end of the seventh winding L7. The other end of the eighth winding L8 is connected to the fifth end of the thirteenth switching switch S13 to form a first node. The sixth end of the thirteenth switching switch S13 is connected to one end of the seventh winding L7. The other end of the seventh winding L7 is connected to the eighth end of the fourteenth switching switch S14 to form a second node. The seventh end of the fourteenth switching switch S14 is connected to the first end of the eleventh switching switch S11. The third end of the twelfth switching switch S12 is connected to the second node. The fourth end of the twelfth switching switch S12 is connected to the first node;
[0048] The eleventh switching switch S11, the seventh winding L7, the fourteenth switching switch S14, the eighth winding L8, and the fourteenth switching switch S14 are connected in sequence. And when the eleventh switching switch S11, the thirteenth switching switch S11, and the fourteenth switching switch S14 are all closed, the eleventh switching switch S11, the seventh winding L7, the thirteenth switching switch S13, the eighth winding L8, and the fourteenth switching switch S14 form a loop.
[0049] It should be noted that the point where the tenth switching switch S11 is connected to the fourteenth switching switch S14 is denoted as point Z, and the connection point of the ninth winding L9 and the fifteenth switching switch S15 that is not connected to the connection point of the first winding unit is denoted as point Z1. The C-phase winding is connected to other circuit modules with point Z and point Z1 as the connection points.
[0050] Since the B-phase winding and the C-phase winding have the same composition structure as the A-phase winding, and the connection methods of each winding and the connection methods and switching methods of the switching switches for switching each winding are the same as those of the A-phase winding, they will not be elaborated here.
[0051] At low speed, the first switching switch S1 and the second switching switch S2 in the first winding switching unit 110 in the A-phase winding are closed, and the third switching switch S3 and the fourth switching switch S4 are opened, so that the first winding L1 and the second winding L2 are connected in series. The switching switch connected in parallel at both ends of the third winding L3 in the second winding switching unit 120 is opened, so that the third winding L3 is connected into the circuit, and the first winding L1, the second winding L2, and the third winding L3 are connected into the circuit; at low speed, the sixth switching switch S6 and the seventh switching switch S7 in the first winding switching unit 110 in the B-phase winding are closed, and the eighth switching switch S8 and the ninth switching switch S9 are opened, so that the fourth winding L4 and the fifth winding L5 are connected in series. The tenth switching switch S10 connected in parallel at both ends of the sixth winding L6 in the second winding switching unit 120 is opened, so that the sixth winding L6 is connected into the circuit. At this time, the fourth winding L4, the fifth winding L5, and the sixth winding L6 are connected into the circuit; at low speed, the eleventh switching switch S11 and the twelfth switching switch S12 in the first winding switching unit 110 in the C-phase winding are closed, and the thirteenth switching switch S11 and the fourteenth switching switch S12 are opened, so that the seventh winding L7 and the eighth winding L8 are connected in series. The fifteenth switching switch S15 connected in parallel at both ends of the ninth winding L9 in the second winding switching unit 120 is opened, so that the ninth winding L9 is connected into the circuit. At this time, the seventh winding L7, the eighth winding L8, and the ninth winding L9 are connected into the circuit. In this way, at low speed, more turns of the stator winding of the motor are connected, improving the power performance of the vehicle.
[0052] It should be noted that low speed refers to the vehicle driving speed lower than a speed threshold, and this speed threshold can be set according to requirements.
[0053] At high speed, the first switching switch S1, the third switching switch S3, and the fourth switching switch S4 in the first winding switching unit 110 of the A-phase winding are closed, and the second switching switch S2 is opened, so that the first winding L1 and the second winding L2 are connected in parallel. The switching switch connected in parallel across the third winding L3 in the second winding switching unit 120 is closed. At this time, the first winding L1 and the second winding L2 are connected to the circuit, and the third winding L3 is not connected to the circuit. At high speed, the sixth switching switch S6, the eighth switching switch S8, and the ninth switching switch S7 in the first winding switching unit 110 of the B-phase winding are closed, and the seventh switching switch S7 is opened, so that the fourth winding L4 and the fifth winding L5 are connected in parallel. The tenth switching switch S10 connected in parallel across the sixth winding L6 in the second winding switching unit 120 is closed. At this time, the fourth winding L4 and the fifth winding L5 are connected to the circuit, and the sixth winding L6 is not connected to the circuit. At high speed, the eleventh switching switch S11, the thirteenth switching switch S13, and the fourteenth switching switch S14 in the first winding switching unit 110 of the C-phase winding are closed, and the twelfth switching switch S12 is opened, so that the seventh winding L7 and the eighth winding L8 are connected in parallel. The fifteenth switching switch S15 connected in parallel across the ninth winding L9 in the second winding switching unit 120 is closed. At this time, the seventh winding L7 and the eighth winding L8 are connected to the circuit, and the ninth winding L9 is not connected to the circuit. In this way, at high speed, by reducing the resistance value of the motor winding, the temperature rise of the motor is reduced and the efficiency is improved.
[0054] It should be noted that high speed refers to the vehicle driving speed exceeding the speed threshold, and this speed threshold can be set according to requirements.
[0055] In the embodiment of the present application, the first switching switch S1, the second switching switch S2, the third switching switch S3, the fourth switching switch S4, and the fifth switching switch S5 are all one of a contactor, a relay, and a power switch and any combination thereof. The sixth switching switch S6 to the fifteenth switching switch S15 are also one of a contactor, a relay, and a power switch and any combination thereof.
[0056] In the embodiment of the present application, the drive motor further includes:
[0057] A motor controller for controlling the switch states of the switching switches in the first switch switching unit and the second switch switching unit. The motor controller is electrically connected to each switching switch, and controls the switch states of the respective switching switches by outputting control signals to the corresponding switching switches, so as to change the connection relationship between windings and complete the control of whether the windings are connected to the circuit.
[0058] In the embodiment of the present application, a vehicle is further provided, including the drive motor as Figure 1 shown.
[0059] Those skilled in the art can understand that the relevant modules involved in the present utility model and the functions they implement can be achieved by loading conventional computer software programs or relevant protocols in the prior art on the improved hardware and the devices, components or systems constituted thereby, rather than improving the computer software programs or relevant protocols in the prior art. For example, the improved computer hardware system can still achieve specific functions of the hardware system by loading the existing software operating system. Therefore, it can be understood that the innovation of the present utility model lies in the connection and combination relationship of the hardware modules / units in the prior art, rather than merely the improvement of the specific structures of the hardware modules / units and the software or protocols loaded in the hardware modules to achieve relevant functions.
[0060] The above embodiments are only used to exemplarily illustrate the principles and effects of the present application, rather than to limit the present application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in the present application should still be covered by the claims of the present application.
Claims
1. A driving motor, characterized in that: The driving motor comprises: A three-phase winding, each phase winding of the three-phase winding comprises a first winding unit, a second winding unit, a first winding switching unit and a second winding switching unit, and the first winding unit comprises at least two windings; The first winding switching unit is electrically connected to the first winding unit and is used to switch the connection relationship between at least two windings in the first winding unit, wherein the connection relationship includes a series connection and a parallel connection; The second winding switching unit is electrically connected to the second winding unit, and is used to switch the connection relationship between the second winding unit and the first winding unit, wherein the connection relationship includes series connection and no connection.
2. The drive motor according to claim 1, characterized in that: The first winding unit includes: a first winding and a second winding, and the connection relationship between the first winding and the second winding is switched by the first winding switching unit.
3. The drive motor according to claim 2, characterized in that: The first winding switching unit includes: a first switching switch, a second switching switch, a third switching switch and a fourth switching switch; the first switching switch, the first winding, the third switching switch, the second winding and the fourth switching switch are connected in sequence, and when the first switching switch, the third switching switch and the fourth switching switch are all closed, the first switching switch, the first winding, the third switching switch, the second winding and the fourth switching switch form a loop; the first winding is connected to the third switching switch to form a first node, the fourth switching switch is connected to the second winding to form a second node, and the second switching switch is connected between the first node and the second node.
4. The drive motor according to claim 3, characterized in that: The second winding unit includes at least one third winding; when the second winding unit includes two windings, the two windings are connected in series or in parallel.
5. The driving motor according to claim 4, characterized in that: The second winding unit includes at least three third windings, and the connection relationship between the at least three third windings includes series connection, parallel connection or a mixed connection of series and parallel connection.
6. The drive motor according to claim 4 or 5, characterized in that: The second winding switching unit includes a fifth switch connected in parallel at two ends of the second winding unit.
7. The driving motor according to claim 6, characterized in that: The first switching switch is one of a contactor, a relay, a power switch, and any combination thereof; the second switching switch is one of a contactor, a relay, a power switch, and any combination thereof; the third switching switch is one of a contactor, a relay, a power switch, and any combination thereof; the fourth switching switch is one of a contactor, a relay, a power switch, and any combination thereof; and the fifth switching switch is one of a contactor, a relay, a power switch, and any combination thereof.
8. The driving motor according to claim 7, characterized in that: The drive motor also includes: The motor controller is used to control the switching state of each switch in the first switch switching unit and the second switch switching unit.
9. The driving motor according to claim 5, characterized in that: The series connection includes: all of the at least two windings are connected in series or all of the at least three third windings are connected in series; the parallel connection includes: all of the at least two windings are connected in parallel or all of the at least three third windings are connected in parallel; the mixed connection includes: a series part and a parallel part, the series part includes the third windings connected in series, and the parallel part includes the third windings connected in parallel.
10. An automobile, characterized in that: Comprising a drive motor as described in any one of claims 1-9.