CN2309663Y - High-efficiency rare-earth permanent-magnetic brushless dc electric machine - Google Patents
High-efficiency rare-earth permanent-magnetic brushless dc electric machine Download PDFInfo
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- CN2309663Y CN2309663Y CN 97237086 CN97237086U CN2309663Y CN 2309663 Y CN2309663 Y CN 2309663Y CN 97237086 CN97237086 CN 97237086 CN 97237086 U CN97237086 U CN 97237086U CN 2309663 Y CN2309663 Y CN 2309663Y
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Abstract
The utility model relates to a rare earth permanent magnetic DC motor with high efficiency and no brush, comprising a stator (2) and a rotor (1). The rotor is supported on a bearing (8) on the end cover of the stator. A polyphase stator winding (15) is enchased in a stator iron core. The inner ring of the rotor is provided with rare earth permanent magnets whose poles are identical to poles of the stator winding, and the number of the rare earth permanent magnets is even. The polarity of the surface of adjacent magnets are opposite. A position magnetic sensor (18) of the rotor is arranged near the stator iron core. The utility model is provided with 6 to 10 pairs of poles. The utility model provides a motor which can smoothly start and work, and simultaneously, the starting current of the motor can be reduced, and the use of the motor is very wide.
Description
The utility model relates to a kind of making of direct current machine, especially a kind of rare earth permanent magnet brushless direct current motor.
Rare earth permanent magnet brushless direct current motor generally is to be used as the magnet in magnetic field as rotor, and with armature as stator with have the brush direct current machine Comparatively speaking, generally has good heat dissipation, life-span is long, efficient height (photoelectric transformation efficiency is more than 60%), noiseless, need not maintenance, characteristics such as noise is low, existing a kind of efficient rare-earth permanent-magnet brushless DC electric machine can be referring to＜a kind of efficient rare-earth permanent-magnet brushless DC electric machine 〉, (＜household electrical appliance〉94.9 phases), Chinese patent CN91219285 and for example, CN90211042, CN92 has provided two kinds of brshless DC motors and the application on electric bicycle thereof, 4 phase 8 utmost points and 2 that these patents provide are the basic structure of the rare earth permanent magnet brushless direct current motors such as design of Windings of 4 utmost points mutually, also provided and comprised the multi phase stator winding, with the identical even number rare-earth permanent magnet of magnetic pole of the stator, and the surface polarity of adjacent magnet is opposite, being connected of rotor-position Magnetic Sensor and switching circuit, each phase winding all is connected with the electronic commutation power device, come the position of detection rotor magnetic field by rotor-position sensor with respect to stator winding, the power component of control switch circuit, carrying out winding current by certain logical relation switches, produce torque by the magnetic field of energising winding armature and the magnetic field interaction of rotor rare-earth permanent magnet, by position transducer control winding wheel flow-thru electrode, the torque that is produced makes motor rotate by certain orientation.But existing direct current machine is failed to make motor to start stably in the design of winding and rotary pole and is worked, and the starting current of motor is also excessive, and it is also comparatively difficult to make very high efficiency motor.
The purpose of this utility model provides a kind of motor that can start stably and work, and its starting current can reduce simultaneously, and makes very high efficiency motor.
The purpose of this utility model also is to provide a kind of efficient direct current motor that is used for bicycle.
Technical solution of the present utility model is achieved in that a kind of rare earth permanent magnet brushless direct current motor, comprise stator, rotor, rotor bearing is on the bearing that stator terminal covers, at stator core embedding system multi phase stator winding, be provided with the identical even number rare-earth permanent magnet of stator winding magnetic pole at epitrochanterian inner ring, and the surface polarity of adjacent magnet is opposite, and rotor-position Magnetic Sensor (hall device) is located near the stator core, it is characterized in that being provided with 6-10 to magnetic pole.
Further improvement of the utility model is that polyphase windings adopts the triangle line.
The utlity model has following characteristics:
Air-gap induction reaches more than the 5800GS between rotor and the stator, adds many group magnetic poles efficiency of motor is improved, and reaches more than 80%.A kind of motor that can start stably and work is provided, and its starting current can reduce simultaneously.Purposes of the present utility model is also very extensive, not only be used for electric bicycle motor, other specification is used on as the automatic control to refrigeration machine, certainly shake window, double-acting door motor on the automobile, the motor that automation equipment, automation register instrument, computer peripheral are used, fan electromotor etc., the utility model can also conveniently be used for intelligent motor, reaches very wide speed adjustable range easily.
The utility model is described in further detail below in conjunction with accompanying drawing with by embodiment:
Fig. 1 is the utility model structural representation
Fig. 2 is the utility model stator structure schematic diagram
Fig. 3 is the utility model winding coiling schematic diagram
As Fig. 1, shown in 2, the utility model embodiment gets 8 pairs of magnetic poles, put 16 evenly distributed rare-earth permanent magnets at the interior ring of rotor 1, promptly provide the design of 8 pairs of 16 magnetic poles, and the surface polarity of adjacent magnet block is opposite, the axle 2 of stator and back shaft 12 integrated designs of motor own, as be used for electric bicycle then back shaft be its wheel shaft, on axle, be with the circular conducting magnet core that silicon steel sheet changes, the coil caulking groove that has on the surface of iron core with the axle almost parallel is used to install stator winding, constituted the basic structure of rare earth permanent magnet brushless direct current motor, rotor-position Magnetic Sensor (hall device) 18 is located at the side of stator core, do not influence the small air gap between stator and the rotor, the number of groove is identical with the number of magnet poles that the dynamic magnetic pole and the permanent magnet of winding formation form, can be provided with uniform 32 grooves as groove 19, design of Windings can be 2 phases, 16 utmost points in parallel, each phase winding all is connected with the electronic commutation power device, come the position of detection rotor magnetic field by rotor-position sensor with respect to stator winding, the power component break-make of control switch circuit, carrying out winding current by certain logical relation switches, produce torque by the magnetic field of energising winding armature and the magnetic field interaction of rotor rare-earth permanent magnet, by position transducer control winding wheel flow-thru electrode, the torque that is produced makes motor rotate by certain orientation.The shell that its structural member also is included in rotor is provided with end cap cover plate 3, and has screw packing ring 4,5 fixing with rotor, is provided with bearing and adjusts packing ring 6,7 in the central authorities of end cap, and rotor bearing is on bearing 8.13,14 for causing the power line and the sensor signal lines of controller.The direct current machine of 16 magnetic poles is size as shown in Figure 1, and external diameter is about 165mm, and end cap two edges thickness is about 80mm, and its rated power reaches about 150W.
In the design of this 16 magnetic pole, machine operation is steadily reliable, and no-load current reduces, efficient improves, as pressing above-mentioned power parameter, the no-load current of 8 utmost point rare earth direct current machines is at 800-1000mA, and the no-load current of the present utility model of same size only is about 400-500mA.
Further improvement of the utility model is, as shown in Figure 3, the winding of stator armature adopts delta windings to connect, i.e. 3 phase windings 15, winding is provided with three lead-out wires simultaneously and connects Switching Power Supplies, and controls in three lines two respectively respectively by forward and reverse electric current by Switching Power Supply.The present embodiment winding is actually 3 phases, 16 utmost point windings, the groove number of opening on the iron core is 32 or 48, corresponding above-mentioned groove number respectively in the space of crossing over two grooves or three-flute successively around winding coil, cross over the winding of three-flute as 48 grooves, and adopt repeatedly have up and down in each groove two windings form the flower around, comprise A, B, three big windings of C three-phase among the figure, as the installation that in grooves such as 1,44,77,10, coincides of each winding of A winding.A, B, C three big windings pass through the triangle connected mode again to the power switch power supply.Its control procedure is for providing positive counter current in order at three windings respectively by controller, the rotation of the magnetic field of generation and rare-earth permanent magnet effect drive motors.
Controller with three big windings interrelate generally needs to install three rotor-position sensors, the Hall element to the magnetic sensitivity commonly used.
Another improvement of the present utility model is: groove that has on the surface of iron core and axle are roughly at angle, be generally the 5-15 degree, the logarithm of magnetic pole is many more, the drift angle is just more little, and during as 10 pairs of magnetic poles, its drift angle is the 5-7 degree, during 8 pairs of magnetic poles, its drift angle is the 8-10 degree, after increasing this scheme, the starting current of motor is reduced.Its no-load current has only 300-400mA, and this is especially useful to electric bicycle, so the utility model is particularly suitable for electric bicycle.When this purposes, the rotor case of motor is made the wheel hub of bicycle.
Claims (5)
1. rare earth permanent magnet brushless direct current motor, comprise stator (2), rotor (1), rotor bearing is on the bearing (6) that stator terminal covers, at stator core embedding system multi phase stator winding (15), be provided with the identical even number rare-earth permanent magnet of stator winding magnetic pole at epitrochanterian inner ring, and the surface polarity of adjacent magnet is opposite, and rotor-position Magnetic Sensor (18) is located near the stator core, it is characterized in that being provided with 6-10 to magnetic pole.
2. by the described permanent-magnet brushless DC electric machine of claim 1, it is characterized in that polyphase windings adopts the triangle line.
3. by claim 1 or 2 described permanent-magnet brushless DC electric machines, it is characterized in that putting 16 evenly distributed rare-earth permanent magnets at the interior ring of rotor (1), promptly provide 8 pairs of 16 magnetic poles, the groove number of opening on the iron core is 32 or 48, corresponding above-mentioned groove number respectively in the space of crossing over two grooves or three-flute successively around winding coil.
4. by claim 1 or 2 described permanent-magnet brushless DC electric machines, it is characterized in that the groove (19) that has on the surface of iron core becomes 5-15 degree angle with stator axis.
5. by the described permanent-magnet brushless DC electric machine of claim 4, when it is characterized in that 8 pairs of magnetic poles, its drift angle is the 8-10 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237086 CN2309663Y (en) | 1997-09-18 | 1997-09-18 | High-efficiency rare-earth permanent-magnetic brushless dc electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237086 CN2309663Y (en) | 1997-09-18 | 1997-09-18 | High-efficiency rare-earth permanent-magnetic brushless dc electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2309663Y true CN2309663Y (en) | 1999-03-03 |
Family
ID=33947815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97237086 Expired - Fee Related CN2309663Y (en) | 1997-09-18 | 1997-09-18 | High-efficiency rare-earth permanent-magnetic brushless dc electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2309663Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373752C (en) * | 2003-12-01 | 2008-03-05 | 董祥义 | Low speed brushless DC motor for automatic door |
| CN100405711C (en) * | 2004-12-24 | 2008-07-23 | 西北工业大学 | Rare earth permanent magnet brushless DC motor for dentistry chair seat |
| CN109578211A (en) * | 2018-09-17 | 2019-04-05 | 沈阳工程学院 | Generator landing type T axis mixed drive variable-pitch variable-speed wind generating machine and control methods |
-
1997
- 1997-09-18 CN CN 97237086 patent/CN2309663Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373752C (en) * | 2003-12-01 | 2008-03-05 | 董祥义 | Low speed brushless DC motor for automatic door |
| CN100405711C (en) * | 2004-12-24 | 2008-07-23 | 西北工业大学 | Rare earth permanent magnet brushless DC motor for dentistry chair seat |
| CN109578211A (en) * | 2018-09-17 | 2019-04-05 | 沈阳工程学院 | Generator landing type T axis mixed drive variable-pitch variable-speed wind generating machine and control methods |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |