CN103395362A - Electromobile by means of permanent magnet brushless direct current motors for directly driving electromobile drive axle shafts - Google Patents

Electromobile by means of permanent magnet brushless direct current motors for directly driving electromobile drive axle shafts Download PDF

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Publication number
CN103395362A
CN103395362A CN2013103501661A CN201310350166A CN103395362A CN 103395362 A CN103395362 A CN 103395362A CN 2013103501661 A CN2013103501661 A CN 2013103501661A CN 201310350166 A CN201310350166 A CN 201310350166A CN 103395362 A CN103395362 A CN 103395362A
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CN
China
Prior art keywords
electromobile
driving
motor
wheel
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2013103501661A
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Chinese (zh)
Inventor
朴俊民
鲍志民
李少华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHENYANG PERMANENT MAGNET MOTOR MANUFACTURING Co Ltd
Original Assignee
SHENYANG PERMANENT MAGNET MOTOR MANUFACTURING Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHENYANG PERMANENT MAGNET MOTOR MANUFACTURING Co Ltd filed Critical SHENYANG PERMANENT MAGNET MOTOR MANUFACTURING Co Ltd
Priority to CN2013103501661A priority Critical patent/CN103395362A/en
Publication of CN103395362A publication Critical patent/CN103395362A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an electromobile by means of permanent magnet brushless direct current motors for directly driving electromobile drive axle shafts, and relates to the electromobile. A shaft motor is applied by the electromobile, and the electromobile is adaptive to differential two-wheel or four-wheel driving connection. The electromobile is characterized in that the electromobile axle shafts are used as motor shafts for connection, or a speed reducer is arranged on the shafts to be connected with the electromobile in a direct-driving mode, and namely the motors adjust the drive shafts to be in directly-driving connection with the electromobile drive axle shafts in a self-adaption mode. Independent hanger brackets are adopted by a front hanger bracket and a rear hanger bracket of an electromobile chassis, two or four wheels are driving wheels, and two or four mutually-independent permanent magnet brushless direct current motor shafts are connected with the wheels through cardan shafts respectively. Under the same input voltage of the motors, counter electric potentials of the driving motors are different, the currents are different, the motors are set to work under the current-limiting state, torques of the driving wheels are same, the differential self-adjustment is achieved, the driving torques of the driving wheels are the same, and the driving wheels work under the differential state. According to the electromobile by means of the permanent magnet brushless direct current motors for directly driving the electromobile drive axle shafts, the reliability of the stable linear driving of the electromobile is enhanced.

Description

Permanent-magnet brushless DC electric machine directly drives the battery-driven car of vehicle transmission semiaxis
Technical field
The present invention relates to a kind of electronlmobil, particularly relate to a kind of directly drive battery-driven car of jackshaft of permanent-magnet brushless DC electric machine that utilizes.
Background technology
Electronlmobil has the incomparable advantage of orthodox car on energy-saving and environmental protection and performance, become the main flow of universally acknowledged new-energy automobile development.The pure electric automobile type of drive is as Fig. 1--shown in Figure 3: have single motor to install concentratedly to drive and wheel hub in driving etc. is installed, concentrate single motor to drive, mechanical differential gear box is absolutely necessary, wheel hub motor battery-driven car especially 4 wheel driven electric vehicles does not need the parts such as mechanical differential gear box, ball-type universal-joint, semiaxis, its motor is placed directly in the wheel rim the inside, thereby compact conformation and interior of body space availability ratio are high.The car load center of gravity reduces, and vehicle run stability improves; Lose 10% left and right of conventional truck combustion engine output energy in the wheel transmittance process; Compare with combustion engine, concentrated motor-driven vehicle, wheel hub drives battery-driven car, each wheel carries out the control of propulsive effort and braking force fast by wheel hub motor, greatly improves the driving dynamics performance of vehicle, easily by electric machines control technology, realizes ABS, TCS and ESP function; Drive importing line traffic control 4 on battery-driven car at 4 wheel hubs and take turns steering technique, can improve the Vehicular turn rideability, and effectively reduce Turning radius, greatly increase and turn to nimble property, can omit mechanical braking sytem, realize motor braking; Easily realize electric braking, Electro-mechanical brake and the braking energy feedback of each electric drive wheel, energy savings.But: in wheel hub, mounted motor drives, also face now a lot of problems, concerning In-wheel motor driving, introducing due to wheel hub motor, the car load nonspring carried mass significantly increases, because the motor torque fluctuation directly acts on wheel (or through speed reduction gearing), interval at specific high pulling torque rotating speed, easily cause the resonance of suspension fore-and-aft direction; Drive and compare with concentrated motor, hub driven motor system gravity position is low,, and have mutual surface of revolution, therefore sealing difficulty, the car load fordability is not strong; Due to the heat of tyre in operation, the heat that particularly brakes, how the heat that motor itself produces sheds, and difficulty is very large.Also there is simultaneously the electronic differential problem.
Summary of the invention
The object of the present invention is to provide a kind of battery-driven car that utilizes permanent-magnet brushless DC electric machine directly to drive the transmission automobile axle shaft, this battery-driven car is suspended in motor on vehicle body, the advantage that keeps simultaneously wheel hub motor, cancel mechanical differential gear box, make machine operation at limited current state, the torque of drive wheel is basic identical, has realized the self-regulating function of differential, has strengthened the reliability of vehicle stabilization straight-line travelling.
The objective of the invention is to be achieved through the following technical solutions:
Directly the drive battery-driven car of jackshaft of permanent-magnet brushless DC electric machine, for the battery-driven car that spindle motor self adaptation differential 2 is taken turns or 4 wheel drive connect, described battery-driven car semiaxis connects as motor shaft, or connection reducer directly drives the connection battery-driven car on axle, namely, regulate transmission shaft through the motor self adaptation and directly drive connection battery-driven car semiaxis, its chassis fore suspension and rear suspension adopts independent suspension, 2 or 4 wheels are drive wheel, are connected with wheel by versatile spindle by 2 or 4 separate permanent-magnet brushless DC electric machine axles respectively; Each motor is under same input voltage, and the counter potential of drive motor is different, and electric current is different, sets motor and works under limited current state, and the torque phase of drive wheel is same, realizes the self-regulation of differential, and drive wheel moment equates, works under the differential state.
Advantage of the present invention and effect are:
1. the present invention, the plurality of advantages of maintenance wheel hub motor, also cancelled mechanical differential gear box.Simultaneously motor is suspended on vehicle body, thereby is converted into spring carried mass, from root, solved the nonspring carried mass problems of too, the vibrations of wheel are dissolved by universal-joint; The temperature of the wheel heat that particularly brakes, do not enter motor, and motor is in good working state; There is no the difficult problems such as water-proff packing yet.
2. machine operation of the present invention is at limited current state, and the torque of drive wheel is basic identical, has realized the self-regulating function of differential, has strengthened the reliability of vehicle stabilization straight-line travelling.
Description of drawings
Fig. 1 is for concentrating single motor to drive connection diagram;
Fig. 2 installs in wheel hub to drive connection diagram;
Fig. 32 takes turns or its structural representations of battery-driven car of 4 wheel drive;
Fig. 4 is the motor characteristic diagram of curves;
Fig. 5 is motor of the present invention and controls and adopt three phase winding star connection figure;
Fig. 6 is in the situation that consider winding inductance, the basic circuit diagram under state;
Fig. 7 is 4 wheel driven electric vehicle constructionals drawing;
Fig. 8 is the birds-eye view of Fig. 7.
The specific embodiment
The present invention is described in detail below in conjunction with embodiment.
The present invention is connected automobile axle shaft with motor shaft, brushless, permanently excited direct current motor (or on axle acceleration and deceleration device) directly drives the battery-driven car walking; Utilize self-regulating function, cancel mechanical difference apparatus.Realize a kind of electrical motor that transmission shaft directly drives, the application spindle motor and can self adaptation differential 2 take turns or the battery-driven car of 4 wheel drive.Its structure is seen Fig. 3, and Fig. 7 chassis fore suspension and rear suspension adopts independent suspension.2 or 4 wheels are drive wheel, are connected with wheel by versatile spindle by 2 or 4 separate permanent-magnet brushless DC electric machines (spindle motor) respectively.
The present invention be with automobile axle shaft as the motor adapter shaft, brushless, permanently excited direct current motor (or on axle acceleration and deceleration device) directly drives the battery-driven car walking; Utilize self-regulating function, cancel mechanical difference apparatus.Realize a kind of electrical motor that transmission shaft directly drives, the application spindle motor and can self adaptation differential 2 take turns or the battery-driven car of 4 wheel drive.Its structure is seen Fig. 3, Fig. 7, and the chassis fore suspension and rear suspension adopts independent suspension.2 or 4 wheels are drive wheel, are connected with wheel by versatile spindle by 2 or 4 separate permanent-magnet brushless DC electric machines (spindle motor) respectively.
Vehicle wheel roll radius of the present invention is not simultaneously: due to varying in size of the effective rolling radius of wheel, cause the rotating speed of drive wheel inconsistent, always there is certain speed discrepancy, the counter potential of drive motor is different, electric current is different, and (according to setting) machine operation is at limited current state when high-speed working condition, and the torque of drive wheel is basic identical, realize the self-regulating function of differential, strengthened the reliability of vehicle stabilization straight-line travelling., due to the current limiting effect, limited single motor output torque in the low speed operating mode, single motor is not enough to drive car load.The effective radius R of drive wheel is large, and rotation speed n is little, and current i is large, and torque T is large, and slippage rate Sz is large, rotation speed n heighten (R ↑; N ↓; I ↑; T ↑; Sz ↑; N ↑).Otherwise R is little for the drive wheel effective radius, make the rotation speed n step-down (R ↓; N ↓).Difference by slippage rate is regulated, and finally makes each drive wheel moment substantially equal, and left and right motor co-operation, at the differential state, realizes electronic differential self aligning function.
Road adherence coefficient of the present invention is different: road adherence coefficient μ m little, slippage rate Sz is large, rotation speed n is large, current i is little, make rotation speed n to the direction that reduces change (μ m ↓; Sz ↑; N ↑; I ↓; N ↓); Road adherence coefficient μ m large, slippage rate Sz is little, rotation speed n is little, current i is large, make rotation speed n to the direction that increases change (μ m ↑; Sz ↓; N ↓; I ↑; N ↑).By the adjusting of slippage rate, although the rotating speed of each drive wheel is different, the torque of drive wheel is substantially equal, makes vehicle keep straight-line travelling, has completed the difference effect, realizes the electronic differential adaptation function.
Turning driving operating mode of the present invention: when turning, outside the driving radius R less than outer drive wheel in the radius of gyration R of interior drive wheel, so outside the interior actual speed n less than outer drive wheel of the actual speed n of interior drive wheel; Can obtain outside the interior counter electromotive force E less than outer drive wheel of counter electromotive force E of interior driving wheel motor, because each motor is under same input voltage, therefore, the winding phase current i of interior driving wheel motor is interior greater than outside outer driving wheel motor winding phase current i; In the torque T of interior drive wheel outside the torque T greater than outer drive wheel, and alleviate in the load-bearing G of interior wheel, the load-bearing G of off-side wheel increases outward, therefore, large in the slippage rate Sz of interior side drive wheel, outer side drive wheel slippage rate Sz outer little (in R<R outside; In n<n outside; In E<E outside; In i>i outside; In T>T outside; In G ↓; Outside G ↑; In Sz ↑; Outside Sz ↓).Can learn according to the straight line performance analysis, large in the slippage rate Sz of interior side drive wheel, reduce in rotation speed n, outer side drive wheel slippage rate Sz is outer little, rotation speed n increase outward (in Sz ↑; In n ↓; Outside Sz ↓; N is outer ↑) namely outer side drive wheel rotation speed n is outer greater than (outside n>n is interior) in interior side drive wheel rotation speed n.Realized the differential adaptive problem.

Claims (1)

1. the permanent-magnet brushless DC electric machine battery-driven car of jackshaft of directly driving, it is characterized in that, for the battery-driven car that spindle motor self adaptation differential 2 is taken turns or 4 wheel drive connect, described battery-driven car semiaxis connects as motor shaft, or connection reducer directly drives the connection battery-driven car on axle, namely, regulate transmission shaft through the motor self adaptation and directly drive connection battery-driven car semiaxis, its chassis fore suspension and rear suspension adopts independent suspension, 2 or 4 wheels are drive wheel, are connected with wheel by versatile spindle by 2 or 4 separate permanent-magnet brushless DC electric machine axles respectively; Each motor is under same input voltage, and the counter potential of drive motor is different, and electric current is different, sets motor and works under limited current state, and the torque phase of drive wheel is same, realizes the self-regulation of differential, and drive wheel moment equates, works under the differential state.
CN2013103501661A 2013-08-13 2013-08-13 Electromobile by means of permanent magnet brushless direct current motors for directly driving electromobile drive axle shafts Pending CN103395362A (en)

Priority Applications (1)

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CN2013103501661A CN103395362A (en) 2013-08-13 2013-08-13 Electromobile by means of permanent magnet brushless direct current motors for directly driving electromobile drive axle shafts

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CN2013103501661A CN103395362A (en) 2013-08-13 2013-08-13 Electromobile by means of permanent magnet brushless direct current motors for directly driving electromobile drive axle shafts

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107347470A (en) * 2017-09-11 2017-11-17 周航 A kind of Omni-mobile pruning fruit tree car
CN110641272A (en) * 2018-06-27 2020-01-03 林昌慧 Direct drive system of electric vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2925946Y (en) * 2006-03-07 2007-07-25 钟利俊 Electric vehicle for directly time-division driving front and rear wheels
CN101648517A (en) * 2009-08-30 2010-02-17 肖国锋 Brushless hub motor four-drive device for electric car
CN101830172A (en) * 2010-05-12 2010-09-15 湖北车桥有限公司 Wheel-rim electric axle
CN201663523U (en) * 2010-04-13 2010-12-01 胡润行 Brushless permanent-magnetic direct-current motor for electric automobiles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2925946Y (en) * 2006-03-07 2007-07-25 钟利俊 Electric vehicle for directly time-division driving front and rear wheels
CN101648517A (en) * 2009-08-30 2010-02-17 肖国锋 Brushless hub motor four-drive device for electric car
CN201663523U (en) * 2010-04-13 2010-12-01 胡润行 Brushless permanent-magnetic direct-current motor for electric automobiles
CN101830172A (en) * 2010-05-12 2010-09-15 湖北车桥有限公司 Wheel-rim electric axle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107347470A (en) * 2017-09-11 2017-11-17 周航 A kind of Omni-mobile pruning fruit tree car
CN110641272A (en) * 2018-06-27 2020-01-03 林昌慧 Direct drive system of electric vehicle

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Application publication date: 20131120