CN202076916U - Permanent magnet direct current brushless motor used for electric vehicles - Google Patents
Permanent magnet direct current brushless motor used for electric vehicles Download PDFInfo
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- CN202076916U CN202076916U CN2011202034786U CN201120203478U CN202076916U CN 202076916 U CN202076916 U CN 202076916U CN 2011202034786 U CN2011202034786 U CN 2011202034786U CN 201120203478 U CN201120203478 U CN 201120203478U CN 202076916 U CN202076916 U CN 202076916U
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- motor
- permanent magnet
- rotor
- stator
- magnet
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The utility model provides a permanent magnet direct current brushless motor used for electric vehicles and is characterized in that the motor comprises a stator iron core (5) which is pressed on the inner wall of a casing (4), a stator coil (9) which is embedded in the wire slot of the stator iron core (5), a rotor iron core (8) which is pressed on a motor shaft, and a plurality of strip-shaped grooves which are uniformly distributed on the circumference of the rotor iron core and in the length direction of the rotor iron core; a strip-shaped permanent magnet (7) is arranged in each groove in a way of fixed connection and stainless steel rings (6) are sleeved on the strip-shaped permanent magnets; and a semi-ring-shaped PCB (printed circuit board) is arranged on the inner side of the non-shaft extension end of the motor shaft and provided with hall sensors (22) which are arranged in the positions corresponding to the end faces of the permanent magnets (7).
Description
Technical field
The utility model relates to a kind of motor, relates to a kind of used for electric vehicle non-brush permanent-magnet DC motor of energy-efficient, speed-regulating range width specifically.
Background technology
Along with the quickening of automobile family oriented process, the problem that automobile brings to municipal pollution is also more and more outstanding, and for being devoted to head it off, the electric automobile of high efficiency, low emission is just paid much attention to.Developing electric automobile energetically will become inexorable trend, and city vehicle and car are the automobile kinds that preferentially develops to motorized.From over 1996, existing 3 types electric automobile comes out, i.e. pure electric automobile, mixed power electric car and fuel cell electric vehicle.
Though the electric automobile kind differs, used traction electric machine is similar basically.Electric automobile has adopted different traction electric machines at different times.What adopt the earliest is dc traction motor.Along with electronic technology and development of auto-control technology, alternating current motor, permanent magnet motor and switched reluctance motor demonstrate the performance more more superior than DC motor, and these motor are progressively replacing DC motor.
The range of capacity of DC motor is big, can select for use as required.Its manufacturing technology and control technology are all ripe, and drive system is also simpler, low price.But direct current machine structurally has vulnerable parts such as brush, commutator, therefore has maintenance difficulty, life-span shortcomings such as weak point, environment for use require height, complex structure, efficient is low, quality is big and volume is big, consumptive material is many.Newly the various electric automobiles of development no longer adopt DC motor basically at present.
Though advantages such as that the three phase squirrel cage traction motor has is simple in structure, sturdy and durable, reliable operation, easy to maintenance, low price have obtained using very widely, but still have had technical difficult point.As the high order harmonic component that frequency converter produced, high additional copper loss and iron loss, high insulation dielectric loss, additional pulsating torque, electromagnetic noise etc.
Switched reluctance motor is a kind of novel motor, and its simple in structure, firm, reliable operation have bigger torque when low speed, but vibration is big when low speed, noise is big, efficient is on the low side, and the energy feedback is poor, and control is complicated, uses less.
Summary of the invention
The purpose of this utility model provides a kind of used for electric vehicle non-brush permanent-magnet DC motor at existing weak point in the above-mentioned prior art just.Of the present utility model under the control of corresponding controller, can realize the low speed high torque running, can realize stepless speed regulation again.
Used for electric vehicle non-brush permanent-magnet DC motor of the present utility model comprises the stator core that is fitted on the casing inner wall, be inlaid in the stator coil in the stator core wire casing, be fitted in the rotor core on the motor shaft, surrounding rotor iron core circumference is provided with several strip grooves along its length direction in uniform mode, a strip permanent magnet that is provided with in fixed mode at each groove, is set with stainless steel coil on permanent magnet; In the end cap inboard of motor shaft non-shaft stretching end, be provided with the pcb board of the semicircular structure of band Hall element (position transducer) with the corresponding position of permanent magnet end face.
The utility model is processed with the weight axially extending bore that several are used for ventilating and reduce motor around described rotor core body;
The pcb board of the semicircular structure of the band Hall element described in the utility model comprises the PCB circuit board, is fixedly connected on being used on the PCB circuit board accurately to detect a plurality of Hall elements of the position of rotor: press the 15o angle between its described Hall element and arrange.
More specifically say: the stator core described in the utility model is formed by silicon steel plate stacking, stator winding is flush-mounted in (if modularization punching in the stator core slot, directly be enclosed within on the stator tooth after stator coil winds, the copper factor height, be convenient to mass production), stator core is pressed in people's stator cage, finish the assembling of stationary part.Rotor core is enclosed within on the motor shaft, and permanent magnet is pasted on the rotor core surface, and permanent magnet comes off stainless steel coil of snare outside permanent magnet when preventing the motor high speed rotating.Bearing Installation is placed on the rotor core two ends respectively on motor shaft, play the effect of support motor rotor.Two electric motor end caps are installed in the stator cage two ends, support the motor two bearings, thereby support rotor.
Operation principle of the present utility model is: when pressing logical relation feeding direct current in the coil of stator of motor, the power tube conducting, in the corresponding stator winding, just there is electric current to pass through and produces magnetic field, this magnetic field and p-m rotor magnetic pole interact and just produce moment, make the motor rotor rotation, because Hall element (position transducer) faces the permanent magnet rotary end surface, represented the N of motor permanent magnet really, S utmost point position, it is motor rotor position, rotation along with rotor, control corresponding conducting of Hall element or shutoff, form pulse signal, export to controller, controller is according to the conducting of logical relation power controlling pipe, make each phase winding of motor by logical relation energising or shutoff, thereby the electric current in the armature winding is along with the variation preface commutation successively of rotor-position, make the rotation of armature field stepping, the rotor of motor just constantly rotates continuously.
The utility model advantage compared with prior art is:
1. high efficiency.Promptly do not have copper loss on the brushless DC motor rotor and do not have iron loss again, its efficient is than improving 5-12% with capacity asynchronous motor.
2. power factor height.Brushless DC motor need not be drawn exciting curent from electrical network, and power factor is near 1.
3. detent torque is big, and starting current is little.Individual features is similar when the mechanical property of brushless DC motor and regulating characteristics and the control of separately excited DC motor cabinet, so its detent torque is big, starting current is little, speed-regulating range width, but less than the shortcoming that causes because of brush-commutated device, electronic commutation has replaced mechanical commutation.
4. motor-output height.This motor improves 30% than the asynchronous motor power output when volume is identical with high workload rotating speed.
5. adaptability is strong.Supply voltage offrating+10% or-15%, ambient temperature differ 40K and load torque when 0 ~ 100% nominal torque fluctuates, the actual speed of brushless DC motor and the steady state deviation of setting rotating speed, be not more than set rotating speed ± 1%.
6. good stability.Brushless DC motor is a kind of autocontrol governing system, and it need not need start winding as common synchronous motor, when load changing, can not produce vibration and step-out.
7. simple in structure.Brushless DC motor has the structure of DC motor characteristic, AC asynchronous motor.
8. low-speed performance is good.Brushless DC motor is fit to the occasion of long-term low-speed running, frequent starting, and this is that variable-frequency governor drags impossible realization of Y series motor.
9. the speed-regulating range width of brshless DC motor, the motor maximum speed can reach several ten thousand commentaries on classics.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Sequence number among the figure: 1 motor shaft, 2 electric motor end caps, 3 bearings, 4 casings, 5 stator cores, 6 stainless steel coils, 7 permanent magnets, 8 rotor cores, 9 stator winding, 10 Hall PCB circuit boards.
Fig. 2 is the concrete mounting means schematic diagram of the utility model on electric automobile.
Sequence number among the figure: 11 electric vehicle hubs, 12 car back axles, 13 motor drivers, 14 non-brush permanent-magnet DC motors, 15 car semiaxis.
Fig. 3 is the whole punching stator structure of a motor schematic diagram.
Sequence number among the figure: 16 stator punchings, 17 stator slot shapes.
Fig. 4 is a motor module stator laminating structure schematic diagram.
Sequence number among the figure: 18 modular stator profiles of tooth.
Fig. 5 is the motor rotor construction schematic diagram.
Sequence number among the figure: 20 rotor punchings 20,, 7 permanent magnets, several of 19 surrounding rotor iron core bodies processing are used for ventilating and reduce the weight axially extending bore of motor.
Fig. 6 is the pcb board figure of band Hall element (position transducer).
Sequence number among the figure, 21 bolts, 22 Hall elements, 23 pins, 24 is the PCB circuit board.
Embodiment
The utility model is described further below with reference to embodiment (accompanying drawing):
As shown in Figure 1, used for electric vehicle non-brush permanent-magnet DC motor of the present utility model comprises that the stator core 5(that is fitted on casing 4 inwalls is referring to Fig. 3), be inlaid in the stator coil 9 in stator core 5 wire casings, be fitted in the rotor core 8 on the motor shaft 1 behind the whole closed assembly, surrounding rotor iron core circumference is provided with several strip grooves along its length direction in uniform mode, and a strip permanent magnet 7(who is provided with in fixed mode at each groove is referring to Fig. 5), on permanent magnet 7, be set with stainless steel coil 6; Around described rotor core 8 bodies be processed with several be used for ventilating and the weight axially extending bore 19(that reduces motor referring to Fig. 5).In end cap 2 inboards of motor shaft non-shaft stretching end, be provided with the pcb board 10 of the semicircular structure of band Hall element 22 with the corresponding position of permanent magnet 7 end faces; The pcb board 10 of the semicircular structure of described band Hall element 22 comprises the PCB circuit board, is fixedly connected on being used on the PCB circuit board accurately to detect a plurality of Hall elements 22 of the position of rotor: press the 15o angle between its described Hall element and arrange (referring to Fig. 6); Bearing 3 is installed on the motor shaft 1, is placed on rotor core 8 two ends respectively, plays the effect of support motor rotor; Two electric motor end caps 2 are installed in casing 4 two ends, support the motor two bearings, thereby support rotor.
As described in Figure 2, the concrete mounting means of the utility model on electric automobile is as follows:
After the non-brush permanent-magnet DC motor that assembles 14 and controller 13 being installed on the shelf at car rear portion, connection line, the power supply of controller is provided by lead-acid battery.The motor projecting shaft by spline with after car back axle 12 reducer shafts are connected, with the ring flange on the bolt electric motor end cap and the ring flange on the back axle in one.When controller control motor rotation, motor is given the electric motor car back axle with transmission of torque, drives back wheels of vehicle semiaxis 15 and drives back wheels of vehicle 11 entrys into service, thereby promote the operation of car load.
Claims (3)
1. used for electric vehicle non-brush permanent-magnet DC motor, it is characterized in that: described motor comprises the stator core (5) that is fitted on casing (4) inwall, be inlaid in the stator coil (9) in stator core (5) wire casing, be fitted in the rotor core (8) on the motor shaft, surrounding rotor iron core circumference is provided with several strip grooves along its length direction in uniform mode, a strip permanent magnet (7) that is provided with in fixed mode at each groove, is set with stainless steel coil (6) on permanent magnet (7); Inboard at the end cap (2) of motor shaft non-shaft stretching end, be provided with the pcb board (10) of the semicircular structure of band Hall element (22) with the corresponding position of permanent magnet (7) end face.
2. used for electric vehicle non-brush permanent-magnet DC motor according to claim 1, it is characterized in that: the pcb board (10) of the semicircular structure of described band Hall element (22) comprises the PCB circuit board, is fixedly connected on being used on the PCB circuit board accurately to detect a plurality of Hall elements (22) of the position of rotor.
3. used for electric vehicle non-brush permanent-magnet DC motor according to claim 1 is characterized in that: be processed with the weight axially extending bore (19) that several are used for ventilating and reduce motor around described rotor core (8) body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202034786U CN202076916U (en) | 2011-06-16 | 2011-06-16 | Permanent magnet direct current brushless motor used for electric vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202034786U CN202076916U (en) | 2011-06-16 | 2011-06-16 | Permanent magnet direct current brushless motor used for electric vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202076916U true CN202076916U (en) | 2011-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202034786U Expired - Fee Related CN202076916U (en) | 2011-06-16 | 2011-06-16 | Permanent magnet direct current brushless motor used for electric vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202076916U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103210746A (en) * | 2012-01-20 | 2013-07-24 | 侯巧生 | Electric lawn mower |
| WO2017173878A1 (en) * | 2016-04-05 | 2017-10-12 | 深圳市帅泰科技有限公司 | Brushless motor |
-
2011
- 2011-06-16 CN CN2011202034786U patent/CN202076916U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103210746A (en) * | 2012-01-20 | 2013-07-24 | 侯巧生 | Electric lawn mower |
| WO2017173878A1 (en) * | 2016-04-05 | 2017-10-12 | 深圳市帅泰科技有限公司 | Brushless motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20130616 |