CN2265624Y

CN2265624Y - Permanent magnet brushless motor

Info

Publication number: CN2265624Y
Application number: CN 96234911
Authority: CN
Inventors: 李忠武; 周长进; 曾祥铭; 王坚强
Original assignee: No712 Inst No7 Research Inst Chinese Shipbuilding Corp
Current assignee: No712 Inst No7 Research Inst Chinese Shipbuilding Corp
Priority date: 1996-05-23
Filing date: 1996-05-23
Publication date: 1997-10-22
Anticipated expiration: 2006-05-23

Abstract

The utility model relates to a permanent magnetic motor without brushes, which comprises a motor body, a position sensor and a controller, wherein, the motor body is provided with a stator and a rotor. The utility model is characterized in that the stator and the rotor which are in the shape of a disk are provided with space along axial directions; a series of permanent magnets which are evenly distributed on the circumference of the rotor face to the stator by respective end surfaces; the stator is provided with windings which are distributed corresponding to the permanent magnets; each winding is composed of loops which are connected in series or in parallel; the sensor for testing the position of the rotor is arranged corresponding to the permanent magnets or in a method of attaching to the permanent magnets and is in a range which is favorable for the sensor to being affected by the magnetic fields of the permanent magnets. The motor has the advantages of high efficiency, small volume, light weight, etc.

Description

Permanent magnetic brushless

The utility model relates to a kind of magneto, particularly permanent magnetic brushless.

Existing AC and DC motor can not adapt to the needs in fields such as the electromechanics that develops rapidly, traffic, household electrical appliance, especially restricted the development of electric automobile, battery-operated motor cycle and electric assisted bicycle, this is owing to operation characteristics such as such motor often are difficult to possess the efficient height simultaneously, volume is little, in light weight.

For this reason, the purpose of this utility model is to provide a kind of permanent magnetic brushless, and it is by to stator, the isostructural improvement of rotor, can satisfy high efficiency simultaneously, volume is little and requirement such as in light weight.

The technical scheme that realizes the utility model purpose is: a kind of permanent magnetic brushless, it comprises motor body, position transducer and control device, motor body has stator and rotor, its distinctive feature is: the stator and the rotor that are plate-like are provided with vertically at interval, the a series of permanent magnets that are distributed in rotor circumference with its end face towards stator, stator has the winding that relative permanent magnet distributes, this winding is formed by the coil serial or parallel connection, and relative permanent magnet of the transducer of detection rotor position or additional permanent magnet setting also are in and help being subjected in the scope of its influence of magnetic field.

And transducer is made of the Hall effect integrated circuit.

And permanent magnet and coil resemble a pear in shape circular or trapezoidal.

And stator is contained and is installed in the rotor.

And, at the back of rotor permanent magnet, be provided with the yoke plate made from soft iron.

And, on outer circumference surface, be inlaid with the steel ring shielding magnetism near the rotor of body both sides.

(referring to Fig. 1) in the above-described configuration, signal of sensor by the reflection rotor-position, make armature winding feed successively by control device, thereby on stator, produce the rotating magnetic field of great-jump-forward, drag the rotor rotation that has permanent magnet, along with the rotation of rotor, position transducer is constantly sent signal again, to change the "on" position of armature winding, motor is rotated continuously.Because the utility model catch basin formula rotor, permanent magnetism, no iron core and brushless be in one (as having adopted the little plate-like rotor of axial dimension), thereby machine volume and weight have been reduced significantly; Again owing to replaced brush with the contactless electronic commutating circuit that existing position transducer, control device and this device had, this has not only been avoided frictional dissipation, improve complete machine and exert oneself, and will not exist because of the wear of brush problems such as influencing the complete machine operation that lost efficacy.But in addition the utility model have also that noise is low, the big stepless speed regulation of starting torque and advantage such as easily realize running up.

The utility model is described in further detail below with reference to accompanying drawing.

Fig. 1 is the block diagram that is used to explain this motor operation logic.

Fig. 2 is the half sectional view of first kind of embodiment of the technical program.

Fig. 3 is the half sectional view of its second kind of embodiment.

Fig. 4 is the half sectional view of its third embodiment.

Fig. 5 is the half sectional view of its 4th kind of embodiment.

Fig. 6 is the half sectional view of its 5th kind of embodiment.

Fig. 7, Fig. 8 are respectively the schematic diagrames of pyriform permanent magnet and coil.

Fig. 9, Figure 10 are respectively the schematic diagrames of circular permanent magnet and coil.

Figure 11, Figure 12 are respectively the schematic diagrames of trapezoidal permanent magnet and coil.

Figure 13 is Fig. 2 A-A place partial enlarged drawing.

Figure 14 is the partial enlarged drawing at Fig. 3 B place.

Figure 15 is the longitudinal section schematic diagram of scallop hole shown in Figure 14.

Figure 16 is the partial enlarged drawing at Fig. 4, Fig. 5 C, D place.

With reference to Fig. 1～Fig. 6, the utility model comprises motor body 2, position transducer 6 and control device, and motor body 2 has stator 1 and rotor 4, and general, control device is located at outside the motor body 2.Described stator 1, rotor 4 all are plate-like and arrange at interval vertically, the quantity of stator and rotor 1,4 and set-up mode can be with reference to following table at interval:

Accompanying drawing	Fig. 2	Fig. 3,6	Fig. 4	Fig. 5
Accompanying drawing	Fig. 2	Fig. 3,6	Fig. 4	Fig. 5	Stator quantity	2	1	2	4
Rotor quantity	1	2	3	6	Stator quantity	2	1	2	4
Rotor quantity	1	2	3	6	Fixed (son) changes (son) interval mode	The fixed commentaries on classics decided	Changeing fixed changes	Change the fixed fixed commentaries on classics of changeing	Change and to decide commentaries on classics and walk around surely and decide commentaries on classics and change surely

Certainly under the guidance of given quantity of last table and each figure and interval mode, the permutation and combination method of multiple stator 1 and rotor 4 can also be arranged, just do not give unnecessary details one by one at this.The a series of permanent magnets 5 that are distributed in rotor 4 circumference towards stator 1, can adopt epoxies bonding agent bonding between permanent magnet 5 and the rotor 4 with its end face.In order to reduce leakage field, in the embodiment of Fig. 3～shown in Figure 6,, be provided with the yoke plate made from soft iron 8 at the back of outside rotor 4 permanent magnets 5 for two or more rotors 4, this yoke plate 8 can be anchored on the rotor 4 with screw.When motor body 9 adopts metal materials, be preferably on the outer circumference surface near the rotor 4 of body 9 both sides and be inlaid with steel ring shielding magnetism 11.Because this motor is the axial magnetic circuit structure, so influence the parts of axial air-gap higher processing precision should be arranged, in order to reduce vibration and noise, should note controlling the axial movement value of motor shaft 13, can adopt pad 12 to adjust the axial air-gap precision in case of necessity.

The stator 1 of this motor has the winding that relative rotor 4 permanent magnets 5 distribute, and this winding is made of coil in series or in parallel with each other 3.Described stator 1 can adopt thermal conductivity good highstrenghtpiston's die casting or injection mo(u)lding, the coil 3 that is distributed on the stator 1 turns to pyriform, circle or trapezoidal (referring to Fig. 8, Figure 10, Figure 12) by electromagnetic wire, meanwhile, the shape of rotor 4 permanent magnets 5 preferably also corresponding (referring to Fig. 7, Fig. 9, Figure 11) with it.Described coil 3 can adhere on the stator 1, and two windings differ 90 ° of electrical degrees respectively, in case the pulsation of spline square.Rotor 4 can also can adopt aluminium alloy or other non-magnet materials to make by highstrenghtpiston's die casting or injection mo(u)lding.With reference to each figure, transducer 6 relative permanent magnets 5 (as Fig. 2, Fig. 3, Figure 13) that are made of known Hall effect integrated circuit or additional permanent magnet 10 (as Fig. 4, Fig. 5, Fig. 6, Figure 16) are provided with and are in and help being subjected in the scope of its influence of magnetic field.(seeing Fig. 3, Figure 14, Figure 15) should open a scallop hole 7 that can allow magnetic field pass at yoke plate 8 places when yoke plate 8 separates transducer 6 and permanent magnet 5.Transducer 6 can be contained on the body 9 of motor one side, and the distance between it and permanent magnet 5 or the additional permanent magnet 10 is 0.5～2mm.When motor is unidirectional rotation, 1 or 2 position transducer 6 (seeing Figure 13) generally can be set, when being two-way rotation, 2 or 4 position transducers 6 can be set then.

With reference to Fig. 6, when this motor was used for battery-operated motor cycle or electric assisted bicycle, stator 1 can be contained and is installed in the rotor 4, and motor shaft 13 then maintains static.

Claims

1, a kind of permanent magnetic brushless, comprise motor body [2], position transducer [6] and control device, motor body [2] has stator [1] and rotor [4], it is characterized in that: the stator [1] and the rotor [4] that are plate-like are provided with vertically at interval, the a series of permanent magnets [5] that are distributed in rotor [4] circumference with its end face towards stator [1], stator [1] has the winding that relative permanent magnet [5] distributes, this winding is formed by coil [3] serial or parallel connection, and relative permanent magnet [5] of the transducer [6] of detection rotor [4] position or additional permanent magnet [10] are provided with and are in and help being subjected in the scope of its influence of magnetic field.

2, motor according to claim 1 is characterized in that: transducer [6] is made of the Hall effect integrated circuit.

3, motor according to claim 2 is characterized in that; Permanent magnet [5] and coil [3] resemble a pear in shape circular or trapezoidal.

4, motor according to claim 3 is characterized in that: stator [1] is contained and is installed in the rotor [4].

5, according to any described motor in the claim 1～4, it is characterized in that:, be provided with the yoke plate made from soft iron [8] at the back of rotor [4] permanent magnet [5].

6, motor according to claim 5 is characterized in that: be inlaid with steel ring shielding magnetism [11] on the outer circumference surface near the rotor [4] of body [9] both sides.