CN101902088A

CN101902088A - Double-winding permanent magnet motor

Info

Publication number: CN101902088A
Application number: CN2009101457136A
Authority: CN
Inventors: 马善振
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-30
Filing date: 2009-05-30
Publication date: 2010-12-01

Abstract

The invention discloses a double-winding permanent magnet motor, which consists of a rotor part, a stator part and a position detection part, wherein the rotor part consists of a motor shaft, a rotor core, a magnetic steel, a bearing and the like; and the stator part mainly comprises a stator shell, a stator core, a large-torque winding, a high-speed winding, an end cover and the like. Compared with the conventional product, the load property of the double-winding permanent magnet motor is very accordant with that of an electric vehicle; when the vehicle is started or climbs a slope, the large-torque winding of the motor works, and the motor outputs a large torque; and when the vehicle needs to run at a high speed, the high-speed winding of the motor works, and the motor can provide a high rotational speed to drive the vehicle to run at the high speed. The double-winding permanent magnet motor has the characteristics of wide speed range, large low-speed motor torque, good high-speed performance, high efficiency, good regenerative braking effect, small volume, light weight, high specific power, high reliability and relatively simple control system thereof, and is an ideal driving motor of the electric vehicle.

Description

A kind of double winding magneto

Affiliated technical field

The present invention relates to a kind of motor, particularly a kind of double winding magneto.

Background technology

Three big core technologies of motor vehicle are battery, motor and automatically controlled at present, its main difficult point is that battery capacity is little, it is few to discharge and recharge number of times, 2 points that cause the motor vehicle technology mainly to be concentrated: the one, under the bottleneck that battery technology is difficult to go beyond, how to improve the electric energy service efficiency, improve the electric automobile continual mileage, therefore require drive motors must meet battery behavior, be selected motor want the efficient height, use electric current little, avoid the battery transient large current discharge, motor power feedback performance is good.The 2nd, be subjected to the restriction of battery performance, motor vehicle is mainly used in urban transportation, the vehicle most of the time is in the operating state of starting, acceleration, braking, so performance index such as the energy density of the overload capacity of the efficient the when starting performance of motor (starting torque/starting current), acceleration performance, low speed, the energy regeneration ability when braking and sliding, motor, motor, motor reliability are particularly important to motor vehicle.Based on above 2 points, desirable motor vehicle motor must should meet battery charging/discharging characteristic, meets the load characteristic of vehicle again.Magneto efficient height, starting performance is good, volume is little, in light weight, be the desirable motor that drives motor vehicle.The electric vehicles magneto all adopts single winding electric machine at present, if require to have bigger breakaway torque when this motor manufactures and designs, because the restriction motor of back emf coefficient is difficult to realize high-speed cruising, maybe can only realize by complicated weak magnetic control system at a high speed, and weak magnetic control system has consumed the energy content of battery; Otherwise if be high rotational speed with design of electrical motor, the breakaway torque of motor will reduce, and be difficult to satisfy the vehicle launch acceleration request, maybe can only improve breakaway torque by the expanded motor winding current.

Summary of the invention

Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, a kind of double winding magneto (abbreviation motor) is provided, motor promptly can be realized the low rotation speed large torque running under nonshared control unit control, can realize high rotating speed operation again.

Technical solution of the present invention is: the double winding magneto is grouped into by rotor portion, stationary part and position detection part, rotor portion is made up of parts such as motor shaft, rotor core, magnet steel, bearings, and stationary part mainly is made up of parts such as stator cage, stator core, big torque winding, high speed winding, electric motor end caps.Rotor core is enclosed within on the motor shaft, and magnet steel is installed on the rotor core, and Bearing Installation is in the rotor core two ends respectively on motor shaft, plays the effect of support rotor part.And torque winding, high speed winding are placed in the stator core greatly, and stator core is pressed in the stator cage, and two electric motor end caps are installed in the stator cage two ends, and the support motor two bearings is formed a complete motor.Position detecting device can be installed in motor internal, also can be installed in the motor outside, detects the rotor rotary angle position.

Principle of the present invention is: when motor feeds electric current by logical relation in big torque winding or high speed winding, in motor stator core, produce rotating magnetic field, the intrinsic magnetic field coupling of this magnetic field and rotor magnetic steel produces torque, this torque is on rotor core, driving rotor partly rotates, make the motor rotation, electric energy is converted into mechanical energy.When vehicle start quickens operation or vehicle driving up when needing the big torque of motor output, nonshared control unit is controlled the work of big torque winding, and motor can be exported bigger torque, powered vehicle starting or quicken operation.When vehicle during at the level road high-speed cruising, need motor output high rotational speed, and the motor torque that at this moment needs is less, controller cuts off the work of big torque winding, the work of control high speed winding, motor can be exported high rotational speed, the powered vehicle high-speed cruising.

The present invention's advantage compared with prior art is: 1. the motor external characteristic is good, meets very much the load characteristic of vehicle, and especially motor has valuable low speed high torque characteristic, and big starting torque can be provided, and satisfies the acceleration request of vehicle.2. velocity interval is wide, and motor can be very low to moving in the high speed range very much.3. electric efficiency height, especially under the heavy-duty low-speed vehicle condition, motor still can keep higher efficient, and this energy content of battery to preciousness is very important.4. overload capacity is strong, and this motor can improve overload capacity more than 2 times than simplex winding magneto, satisfies starting, the climbing of vehicle, the needs of sloping road cycling start.5. regenerative braking is effective, and vehicle is that big torque is around still producing higher generating voltage when low cruise, and realization charges the battery easily, plays the electric braking effect simultaneously, alleviates the mechanical brake burden.

Description of drawings

Fig. 1 is for being a kind of double winding permanent magnet motor structure figure of the present invention.

Fig. 2 is an another kind of version of the present invention, and promptly double-iron core double winding permanent magnet motor structure figure is distortion of the present invention or extension.

Fig. 3, Fig. 4, Fig. 5 are big torque winding of the present invention and high speed winding correlation schematic diagram.

Embodiment

As shown in Figure 1, be fitted on the motor shaft 1 behind the rotor core 3 whole dresses that change, magnet steel 4 sticks on the rotor core 3, bearing 2 is contained on the motor shaft 1, stator core 6 is fitted in the stator cage 5, big torque winding 7, high speed winding 8 are installed in the wire casing of stator core 6, the outer end of electric motor end cap 10 is connected with stator cage 5, the inner is connected with the outer ring of bearing 2, make motor become as a whole, the rotating part of position detecting device 9 is installed on the motor shaft 1, and the stationary part of position detecting device 9 is installed on the electric motor end cap 10.

Another version of the present invention as shown in Figure 2, motor is made up of two cover stator-rotor iron cores and independently big torque winding 7, high speed winding 8 and associated components, big torque rotor iron core 3, big torque magnet steel 4, big torque stator core 5, big torque winding 6 are formed big torque motor part, and high speed rotor iron core 8, high speed magnet steel 9, high speed stator core 10, high speed winding 11 are formed the high-speed electric expreess locomotive part.Big torque rotor iron core 3 is fitted on the motor shaft 1 jointly with high speed rotor iron core 8, big torque stator core 5 is fitted in the stator cage 7 jointly with high speed stator core 10, big torque magnet steel 4 is installed on the big torque rotor iron core 3, big torque winding 6 is installed in the big torque stator core 5, same high speed magnet steel 9 is installed on the high speed rotor iron core 8, and high speed winding 11 is installed in the high speed stator core 10.Bearing 2 is contained on the motor shaft 1, the outer end of electric motor end cap 13 is connected with stator cage 7, the inner is connected with the outer ring of bearing 2, make motor become as a whole, the rotating part of position detecting device 12 is installed on the motor shaft 1, and the stationary part of position detecting device 12 is installed on the electric motor end cap 13.

The confidential ratio of double winding Permanent Magnet and Electric of the present invention is with the bigger torque of simplex winding motor output of power, so motor shaft 1 of double winding magneto, motor shaft than conventional motor should have bigger diameter and bigger intensity, to satisfy the needs of motor output high pulling torque.

As shown in Figure 3, big torque winding 7 and high speed winding 8 are two to overlap independently winding, do not have electrical communication between the two.

As shown in Figure 4, big torque winding 7 is the dependent windings of two covers with high speed winding 8, and both have electrical communication, and both are a kind of cascaded structure forms.

As shown in Figure 5, big torque winding 7 and high speed winding 8 neither two overlap independently winding, and both have electrical communication, and both are a kind of parallel-connection structure forms.

The present invention is applicable to dc brushless motor and synchronous magnetoelectric machine and associated motor, also needs the occasion of big starting torque applicable to outer other of motor vehicle.Position detecting device can be a kind of of hall position checkout gear, photoelectric encoder checkout gear or resolver checkout gear, also can save this position detecting device as required, forms the double winding magneto of no position probing.

Claims

1. double winding magneto, the rotor core of this invention (3) is whole repeatedly to be fitted on the motor shaft (1) behind the dress, magnet steel (4) is pasted and is installed on the rotor core (3), bearing (2) is contained on the motor shaft (1), stator core (6) is fitted in the stator cage (5), big torque winding (7), high speed winding (8) is installed in the wire casing of stator core (6), the outer end of electric motor end cap (10) is connected with stator cage (5), the inner of electric motor end cap (10) is connected with the outer ring of bearing (2), make motor become as a whole, the rotating part of position detecting device (9) is installed on the motor shaft (1), the stationary part of position detecting device (9) is installed on the electric motor end cap (10), it is characterized in that: big torque winding (7) and high speed winding (8) are installed in a magneto simultaneously.

2. a kind of double winding magneto according to claim 1 is characterized in that: big torque winding (7) and high speed winding (8) are operated in the low regime and the high velocity of motor respectively.

3. a kind of double winding magneto according to claim 1, it is characterized in that: big torque winding (7) and high speed winding (8) can be installed in the stator core (6), also can be installed in two stator cores, constitute two stators, birotor, doublewound magneto.

4. a kind of double winding magneto according to claim 1 is characterized in that: big torque winding (7) and high speed winding (8) can be that separate winding or employing has a kind of of series connection form or parallel form winding.

5. a kind of double winding magneto according to claim 1 is characterized in that: this motor can be brshless DC motor or permagnetic synchronous motor, motor can be with position transducer, also can the position sensorless device.