CN201805339U - Brushless motor for electric automobile - Google Patents
Brushless motor for electric automobile Download PDFInfo
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- CN201805339U CN201805339U CN2010202969229U CN201020296922U CN201805339U CN 201805339 U CN201805339 U CN 201805339U CN 2010202969229 U CN2010202969229 U CN 2010202969229U CN 201020296922 U CN201020296922 U CN 201020296922U CN 201805339 U CN201805339 U CN 201805339U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The utility model provides a brushless motor for an electric automobile, which has low-speed and large-torque performance and can flexibly control the operation thereof and improve the starting and acceleration capabilities of the electric automobile. The utility model is realized through the following technical scheme that: the brushless motor for the electric automobile comprises a shell, a rotor, a stator and a motor controller, wherein the rotor and the stator are positioned in the cavity of the shell; the stator comprises a stator punching sheet and a stator coil wound on the stator punching sheet, and a Y-shaped connection method is adopted in a stator coil winding; the brushless motor for the electric automobile comprises a converter capable of converting the connection mode of the stator coil winding and a plurality of cable leading wires, the plurality of cable leading wires are led out from multiple positions of the stator coil, and the plurality of cable leading wires are all connected with the converter; and the converter is connected with the converted control signal output port of the motor controller.
Description
Technical field
The utility model belongs to the technical field of motor, is specifically related to dc brushless motor design, especially pure electric automobile dc brushless motor.
Background technology
The essential performance requirement that satisfies strictness of the motor of on pure electric automobile, using, meanwhile also to adapt to the restriction of size and weight, require motor specific power (in rotor weight) 〉=1.5kW/kg, thereby guarantee that they can be adapted at using in the electric automobile.When the performance of a certain type of using on the pure electric automobile of motor strengthened, the design standard conflict made usually and produces not enough at other type aspect of performance of equal importance like this.For example, the motor that is used to drive in pure electric automobile not only must be compact and in light weight, and require to have enough power and accelerate to the speed that internal combustion engine can produce to make electric automobile rapidly, require simultaneously in the startup and climbing process of direct-drive type pure electric automobile, avoid occurring starting long problem with the climbing capacity deficiency of accelerating time.
Because the moment of motor is very relevant with motor volume generally speaking, therefore need from compact, light unit output greatly power contradict with common design of electrical motor principle.The general requirement of the staring torque of electric automobile is normally to move the 3-10 of moment doubly, and the accelerating time is 30s, requires the drive motors of electric automobile also can meet this requirement like this.
Modern pure electric automobile requires electric-machine directly-driven, promptly cancels gearbox and clutch in the orthodox car, realizes the electrodeless variable-speed operation.
Property requirement in view of the motor of using on the above-mentioned pure electric automobile need improve design.
Summary of the invention
The purpose of this utility model is to provide a kind of used for electric vehicle brushless electric machine, has the low-speed big performance, can improve the startup acceleration capacity of electric automobile to the flexible operation control of motor.
The utility model is achieved through the following technical solutions:
The used for electric vehicle brushless electric machine includes housing, rotor, stator and electric machine controller, and described rotor and stator are arranged in the inner chamber of housing; Described stator includes stator punching and the stator coil that is wrapped on the stator punching, and the stator coil winding adopts Y connection; Wherein, described used for electric vehicle brushless electric machine includes transducer and many cable lead wires of convertible stator coil winding connection, described many cable lead wires are drawn from a plurality of positions of stator coil, and many cable lead wires all are connected with described transducer; Described transducer connects the changeover control signal output port of electric machine controller.
Described housing comprises casing, front end housing and the rear end cap of the tubular that forms sidewall; Described casing is provided with motor liquid cooled system; Described used for electric vehicle brushless electric machine includes 9 cable lead wires, and 9 described cable lead wires link to each other with stator coil, draws after passing rear end cap; The sidepiece of described housing is provided with transducer.
Electric machine controller and DC power supply are electrically connected, and described electric machine controller includes microcontroller, power drive unit, bridge circuit and three-phase voltage lead-out terminal U, V, W; Described microcontroller includes position sensor signal module and changeover control signal module.
To sum up, the beneficial effects of the utility model are:
The method of attachment of dc brushless motor three-phase stator winding has Y (star formula) and Δ (closed).In Δ (closed) armature winding, the triple-frequency harmonics of will inducting electromotive force, and in loop, produce triple harmonic current, this triple harmonic current all with the heating form consumption in the loop of Δ (closed) armature winding, and do not produce useful electromagnetic torque, increased the loss of motor like this.And Y (star formula) connection does not just have the defective of above-mentioned Δ (closed), and therefore Y (star formula) is always adopted in the connection of used for electric vehicle brushless motor stator three phase windings of the present utility model.Because this used for electric vehicle brushless electric machine includes transducer and many cable lead wires of convertible stator coil winding connection, described many cable lead wires are drawn from a plurality of positions of stator coil, and many cable lead wires all are connected with described transducer; Described transducer connects the changeover control signal output port of electric machine controller; Electric machine controller and DC power supply are electrically connected, and described electric machine controller includes microcontroller, power drive unit, bridge circuit and three-phase voltage lead-out terminal U, V, W; Described microcontroller includes position sensor signal module and changeover control signal module.Stator coil 21 adopts Y connection, is divided into three phase windings, and many group stator coils are arranged in each phase winding, organizes the circuit that stator coil can be formed many strings and relation according to the needs of design more.Winding circuit end points or interconnect in the end of band winding iron core, or the outside of guiding to motor with the cable lead wire links to each other with power supply or controller.Because the moment of dc brushless motor is directly proportional with the number of turn that whenever is in series of motor windings, the moment of torsion that how much has determined motor (other condition is constant) of series connection stator coil.Under the controller signals effect, by the connected mode of 2Y and 4Y transducer conversion winding.2Y operates in the starting state of electric automobile; 4Y operates in the high-speed and energy-saving state of electric automobile.Machine operation is at the low speed originate mode, the very fast raising of the speed of a motor vehicle at this moment, and when motor speed reached about 900rpm (about 25 kilometers/hour of the speed of a motor vehicle), motor will become 4Y operation (being the high-speed and energy-saving operation) automatically under controller action.Producing 3-10 nominal torque doubly is because the stator coil that the 2Y connection allows stator respectively be in series is more.Electric automobile has been realized bigger acceleration operation, reaches the specified speed of a motor vehicle in very short time.
Description of drawings
Fig. 1 is the structural representation of the utility model used for electric vehicle brushless electric machine;
Fig. 2 is the stator structure schematic diagram of the utility model used for electric vehicle brushless electric machine;
Fig. 3 is the stator laminating structure schematic diagram of the utility model used for electric vehicle brushless electric machine;
Fig. 4 is the cable lead wire and the stator coil syndeton schematic diagram of the utility model used for electric vehicle brushless electric machine;
Fig. 5 is the A-A cross-sectional view of Fig. 2;
Fig. 6 is that the stator coil winding winding of the utility model used for electric vehicle brushless electric machine adopts 2Y shape connection principle schematic;
Fig. 7 is that the stator coil winding winding of the utility model used for electric vehicle brushless electric machine adopts 4Y shape connection principle schematic;
Fig. 8 is the cable lead wire position view of the utility model used for electric vehicle brushless electric machine;
Fig. 9 is the overall structure schematic diagram of the utility model used for electric vehicle brushless electric machine;
Figure 10 is the electric machine controller and the converter circuit schematic diagram of the utility model used for electric vehicle brushless electric machine;
Figure 11 is the cable lead wire circuit theory schematic diagram of the utility model used for electric vehicle brushless electric machine;
Figure 12 is the converter circuit schematic diagram of the utility model used for electric vehicle brushless electric machine.
Embodiment
The utility model discloses a kind of used for electric vehicle brushless electric machine, shown in Fig. 1,2,9, include housing, rotor 3, stator 2 and electric machine controller 9, described rotor 3 and stator 2 are arranged in the inner chamber of housing; Described stator 2 includes stator punching 22 and the stator coil 21 that is wrapped on the stator punching, and stator coil 21 windings adopt Y connection; Wherein, described used for electric vehicle brushless electric machine includes transducer 8 and many cable lead wires 6 of convertible stator coil winding connection, described many cable lead wires 6 are drawn from a plurality of positions of stator coil 21, and many cable lead wires 6 all are connected with described transducer 8; Described transducer 8 connects the output port of the changeover control signal module of electric machine controller 9.
As Fig. 1, described housing comprises casing 1, front end housing 11 and the rear end cap 12 of the tubular that forms sidewall; Described casing 1 is provided with motor liquid cooled system 4; Described used for electric vehicle brushless electric machine includes 6,9 described cable lead wires 6 of 9 cable lead wires and links to each other with stator coil 21, draws after passing rear end cap 12; The sidepiece of described housing is provided with transducer 5.
As Figure 11, transducer 5 includes HallA, HallB, three signal transducers of HallC.
As Fig. 2,3,5, stator punching 22 is provided with 36 by the uniform groove 221 of circular array, forms the draw-in groove of stator coil 21; Multi-disc stator punching 22 is combined into iron core.
As Fig. 4, stator coil 21 is connected and fixed by lead-in wire connecting line 7 with cable lead wire 6.
As Fig. 6,7, stator coil 21 adopts Y connection, is divided into three phase windings, and many group stator coils are arranged in each phase winding, organizes the circuit that stator coil can be formed many strings and relation according to the needs of design more.Winding circuit end points or interconnect in the end of band winding iron core, or the outside of guiding to motor with the cable lead wire links to each other with power supply or controller.Under the controller signals effect, by 2Y and 4Y transducer, connecing is 2Y operation shown in Figure 6 and 4Y operation shown in Figure 7.2Y operates in the starting state of electric automobile; 4Y operates in the high-speed and energy-saving state of electric automobile.During machine operation, pass through Electric Machine Control, when realizing that electric automobile starts, motor adopts the connection of 2Y, motor produces 3-10 nominal torque doubly, at this moment the very fast raising of the speed of a motor vehicle, when motor speed reached about 900rpm (about 25 kilometers/hour of the speed of a motor vehicle), motor will become 4Y operation (being the high-speed and energy-saving operation) automatically under controller action.Producing 3-10 nominal torque doubly is because the stator coil that the 2Y connection allows stator respectively be in series is more.Electric automobile has been realized bigger acceleration operation, reaches the specified speed of a motor vehicle in very short time.The moment of torsion that how much has determined motor (other condition is constant) of series connection stator coil.Because the moment of dc brushless motor is directly proportional with the number of turn that whenever is in series of motor windings.
As Fig. 6,11, article 9, cable lead wire 6 is A1, A2, A3, B1, B2, B3, C1, C2, C3 with the tie point of stator coil 21, stator coil 21 is divided into three phase windings, adopt 2Y shape connection, this three phase winding all has an end to connect the end of iron core, includes 4 groups of stator coils in each phase winding; Wherein 4 of the A phase winding groups of stator coil methods of attachment are: the A2 point links to each other with the A3 point, having two groups of stator coils between tie point A1 and the A2 is connected in parallel, have two groups of stator coils between the end of tie point A3 and iron core and be connected in parallel, the stator coil employing mode between the end of the stator coil between tie point A1 and the A2 and tie point A3 and iron core is connected in series; 4 groups of stator coils of B phase, C phase winding adopt identical method of attachment, and the B2 point of B phase links to each other with the B3 point, and then B has 2 parallel branch numbers mutually; The C2 point of C phase links to each other with the C3 point, and then C has 2 parallel branch numbers mutually.Adopt 2Y shape connection, have 2 parallel branch numbers in the phase winding, the stator coil of so mutual series connection is more.
The moment constant K m of dc brushless motor is directly proportional with the number of turn that whenever is in series of motor windings.If adopt 9 lead-out wires of Y connection, the motor windings connection is 4Y during the electric automobile high-speed cruising, the motor windings connection was 2Y when electric automobile started, and the number of turn that whenever is in series of motor windings had increased by one times when electric automobile started like this, and just staring torque has increased by one times.Owing to the increase of staring torque, improved the startup acceleration capacity of motor powered automobile.
As Fig. 7, article 9, cable lead wire 6 is A1, A2, A3, B1, B2, B3, C1, C2, C3 with the tie point of stator coil 21, and stator coil 21 is divided into three phase windings, adopts 4Y shape connection, this three phase winding all has an end to connect the end of iron core, includes 4 groups of stator coils in each phase winding; Wherein 4 of the A phase winding groups of stator coil methods of attachment are: tie point A1 point links to each other with the A3 point, having two groups of stator coils between tie point A1 and the A2 is connected in parallel, have two groups of stator coils between the end of tie point A3 and iron core and be connected in parallel, the stator coil between the end of the stator coil between tie point A1 and the A2 and tie point A3 and iron core adopts parallel way to be connected; 4 groups of stator coils of B phase, C phase winding adopt identical method of attachment.Adopt 4Y shape connection, have 4 parallel branch numbers in the phase winding, the stator coil of so mutual series connection than 2Y shape connection few half.
As Fig. 8, the concrete link position of 9 cable lead wires 6 is shown, be a kind of connection (the conversion connection of 2Y and 4Y) of motor, 9 tie points are that A1, A2, A3, B1, B2, B3, C1, C2, C3 are in respectively on the circumference of band winding stator core one end.
As Fig. 9,10, electric machine controller 9 is electrically connected with DC power supply 10, and described electric machine controller 9 includes microcontroller, power drive unit, bridge circuit and three-phase voltage lead-out terminal U, V, W; Described microcontroller includes position sensor signal module and changeover control signal module.
The set of power switches that described electric machine controller 9 includes six BG1 to BG6 becomes bridge circuit; Rated value according to the voltage and current of motor, device for power switching is elected IGBT as, according to the agreement of in microcontroller, finishing writing in advance, three signals of HallA, the HallB that position sensor signal resume module electromechanical transducer sends, HallC, the conducting of microprocessor controls BG1 to BG6 with end, by transducer realize motor just/counter-rotating.
Microcontroller is processed into the desired driving order of six switching devices of power drive unit according to the requirement of motor direction of rotation with from the output signal of HallA, HallB, three Halls of HallC with them; And according to voltage, electric current and rotary speed information feedback analog signal, and the brake signal that sends at random, after AD conversion and computing, produce a pulse-width signal by built-in clock signal.
Power drive unit (IGBT): mainly comprise three-phase half-bridge inversion circuit and boostrap circuit that the MOSFET set of power switches becomes.
Three-phase voltage lead-out terminal U, V, W make binding post with copper bar.
As Figure 12, transducer 8 includes three relays, tie point A1, the B1 of stator coil 21, C1 meet three-phase voltage lead-out terminal U, V, the W on the electric machine controller respectively, and tie point A2, the A3 of stator coil 21, B2, B3, C2, C3 receive respectively on the terminal of relay of transducer 8; The actuating coil of each relay of the relay of transducer 8 is received the output port of the changeover control signal module of electric machine controller by a switch.When switch OFF, motor windings connects the mode into 4Y, the operation of motor high-speed and high-efficiency, and during switch ON, motor windings connects the mode into 2Y, the operation of motor low-speed big.
The startability contrast sees the following form when same scheme motor, different lead-out wire:
Working conditions of motor: 40kW150V
| Rotating speed (rpm) | Torque (N.m) | Electric current (A) | Km | |
| Article 3, lead-in wire | 1143 | 334 | 284 | 1.17 |
| |
248 | 1534 | 447 | 3.43 |
During from last 2Y as can be seen, motor speed is low, and torque is big, and the kM value is bigger. improved the startup acceleration capacity of motor powered automobile like this.
Above-mentioned listed specific implementation is nonrestrictive, and to one skilled in the art, in not departing from the utility model scope, various improvement and the variation carried out all belong to protection range of the present utility model.
Claims (10)
1. the used for electric vehicle brushless electric machine includes housing, rotor (3), stator (2) and electric machine controller (9), and described rotor (3) and stator (2) are arranged in the inner chamber of housing; Described stator (2) includes stator punching (22) and is wrapped in stator coil (21) on the stator punching, and stator coil (21) winding adopts Y connection; It is characterized in that: described used for electric vehicle brushless electric machine includes the transducer (8) and many cable lead wires (6) of convertible stator coil winding connection, described many cable lead wires (6) are drawn from a plurality of positions of stator coil (21), and many cable lead wires (6) all are connected with described transducer (8); Described transducer (8) connects the output port of the changeover control signal module of electric machine controller (9).
2. used for electric vehicle brushless electric machine according to claim 1 is characterized in that: described housing comprises casing (1), front end housing (11) and the rear end cap (12) of the tubular that forms sidewall; Described casing (1) is provided with motor liquid cooled system (4); Described used for electric vehicle brushless electric machine includes 9 cable lead wires (6), and 9 described cable lead wires (6) link to each other with stator coil (21), draws after passing rear end cap (12); The sidepiece of described housing is provided with transducer (5).
3. used for electric vehicle brushless electric machine according to claim 2, it is characterized in that: 9 described cable lead wires (6) are A1, A2, A3, B1, B2, B3, C1, C2, C3 with the tie point of stator coil (21), stator coil (21) is divided into three phase windings, adopt 2Y shape connection, this three phase winding all has an end to connect the end of iron core, includes 4 groups of stator coils in each phase winding; Wherein 4 of the A phase winding groups of stator coil methods of attachment are: tie point A2 links to each other with tie point A3, having two groups of stator coils between tie point A1 and the A2 is connected in parallel, have two groups of stator coils between the end of tie point A3 and iron core and be connected in parallel, the stator coil employing mode between the end of the stator coil between tie point A1 and the A2 and tie point A3 and iron core is connected in series; 4 groups of stator coils of B phase, C phase winding adopt identical method of attachment, and the B2 point of B phase links to each other with the B3 point, and then B has 2 parallel branch numbers mutually; The C2 point of C phase links to each other with the C3 point, and then C has 2 parallel branch numbers mutually.
4. used for electric vehicle brushless electric machine according to claim 2, it is characterized in that: 9 described cable lead wires (6) are A1, A2, A3, B1, B2, B3, C1, C2, C3 with the tie point of stator coil (21), stator coil (21) is divided into three phase windings, adopt 4Y shape connection, this three phase winding all has an end to connect the end of iron core, includes 4 groups of stator coils in each phase winding; Wherein 4 of the A phase winding groups of stator coil methods of attachment are: tie point A1 point links to each other with tie point A3, having two groups of stator coils between tie point A1 and the A2 is connected in parallel, have two groups of stator coils between the end of tie point A3 and iron core and be connected in parallel, the stator coil between the end of the stator coil between tie point A1 and the A2 and tie point A3 and iron core adopts parallel way to be connected; 4 groups of stator coils of B phase, C phase winding adopt identical method of attachment.
5. according to claim 3 or 4 described used for electric vehicle brushless electric machines, it is characterized in that: described electric machine controller (9) is electrically connected with DC power supply (10), and described electric machine controller (9) includes microcontroller, power drive unit, bridge circuit and three-phase voltage lead-out terminal U, V, W; Described microcontroller includes position sensor signal module and changeover control signal module; Power drive unit: comprise three-phase half-bridge inversion circuit and boostrap circuit that the MOSFET set of power switches becomes.
6. used for electric vehicle brushless electric machine according to claim 5 is characterized in that: described transducer (5) includes HallA, HallB, three signal transducers of HallC.
7. used for electric vehicle brushless electric machine according to claim 6 is characterized in that: the set of power switches that described electric machine controller (9) includes six BG1 to BG6 becomes bridge circuit; According to the agreement in microcontroller in advance, three signals of HallA, the HallB that position sensor signal resume module electromechanical transducer sends, HallC, the conducting of microprocessor controls BG1 to BG6 with end, by transducer realize motor just/counter-rotating; Microcontroller is processed into the desired driving order of six switching devices of power drive unit according to the requirement of motor direction of rotation with from the output signal of HallA, HallB, three Halls of HallC with them; And according to voltage, electric current and rotary speed information feedback analog signal, and the brake signal that sends at random, after AD conversion and computing, produce a pulse-width signal by built-in clock signal.
8. used for electric vehicle brushless electric machine according to claim 7, it is characterized in that: described transducer (8) includes three relays, tie point A1, the B1 of stator coil (21), C1 meet three-phase voltage lead-out terminal U, V, the W on the electric machine controller respectively, and tie point A2, the A3 of stator coil (21), B2, B3, C2, C3 receive respectively on the terminal of relay of transducer (8); The actuating coil of each relay of the relay of transducer (8) is received the output port of the changeover control signal module of electric machine controller by a switch.
9. used for electric vehicle brushless electric machine according to claim 1 is characterized in that: described stator punching (22) is provided with 36 by the uniform groove of circular array (221), forms the draw-in groove of stator coil (21); Multi-disc stator punching (22) is combined into iron core.
10. used for electric vehicle brushless electric machine according to claim 1 is characterized in that: described stator coil (21) is connected and fixed by lead-in wire connecting line (7) with cable lead wire (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202969229U CN201805339U (en) | 2010-08-17 | 2010-08-17 | Brushless motor for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202969229U CN201805339U (en) | 2010-08-17 | 2010-08-17 | Brushless motor for electric automobile |
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| Publication Number | Publication Date |
|---|---|
| CN201805339U true CN201805339U (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202969229U Expired - Lifetime CN201805339U (en) | 2010-08-17 | 2010-08-17 | Brushless motor for electric automobile |
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| CN (1) | CN201805339U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377309A (en) * | 2010-08-17 | 2012-03-14 | 珠海银通新能源有限公司 | Brushless motor for electric vehicle |
| CN103904963A (en) * | 2014-03-27 | 2014-07-02 | 捷和电机制品(深圳)有限公司 | Direct-current brushless motor and control circuit |
| CN116802992A (en) * | 2021-04-28 | 2023-09-22 | 客瓦垒石马达株式会社 | Method for saving power of rotating electric machine for electric moving body and rotating electric machine for electric moving body |
-
2010
- 2010-08-17 CN CN2010202969229U patent/CN201805339U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377309A (en) * | 2010-08-17 | 2012-03-14 | 珠海银通新能源有限公司 | Brushless motor for electric vehicle |
| CN102377309B (en) * | 2010-08-17 | 2013-08-14 | 珠海银通新能源有限公司 | Brushless motor for electric vehicle |
| CN103904963A (en) * | 2014-03-27 | 2014-07-02 | 捷和电机制品(深圳)有限公司 | Direct-current brushless motor and control circuit |
| CN116802992A (en) * | 2021-04-28 | 2023-09-22 | 客瓦垒石马达株式会社 | Method for saving power of rotating electric machine for electric moving body and rotating electric machine for electric moving body |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110420 Effective date of abandoning: 20130814 |
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| RGAV | Abandon patent right to avoid regrant |