CN104600944A - Permanent magnet switch reluctance machine and a stator assembly thereof - Google Patents

Permanent magnet switch reluctance machine and a stator assembly thereof Download PDF

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Publication number
CN104600944A
CN104600944A CN201410281636.8A CN201410281636A CN104600944A CN 104600944 A CN104600944 A CN 104600944A CN 201410281636 A CN201410281636 A CN 201410281636A CN 104600944 A CN104600944 A CN 104600944A
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CN
China
Prior art keywords
stator
phase winding
permanent magnet
core
stator core
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CN201410281636.8A
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Chinese (zh)
Inventor
樊新路
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深圳市乐丰科技有限公司
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Priority to CN201410281636.8A priority Critical patent/CN104600944A/en
Publication of CN104600944A publication Critical patent/CN104600944A/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/14Stator cores with salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/17Stator cores with permanent magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/20Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/24Rotor cores with salient poles ; Variable reluctance rotors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/26Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating armatures and stationary magnets
    • H02K21/28Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating armatures and stationary magnets with armatures rotating within the magnets
    • H02K21/30Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating armatures and stationary magnets with armatures rotating within the magnets having annular armature cores with salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K29/00Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18Windings for salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28Layout of windings or of connections between windings

Abstract

The invention relates to a permanent magnet switch reluctance machine and a stator assembly thereof. The motor comprises the stator assembly, a rotor assembly, a rear end cover, a front end cover, a rear bearing, and a front bearing. The stator assembly comprises stator cores, stator windings, and 2P permanent magnets. The interiors of the stator cores are provided with M stator slots, and stator internal salient poles are respectively disposed between two adjacent stator slots. The stator windings are disposed on the stator internal salient poles. Stator-core external convex blocks are arranged on the outer peripheral surfaces of the stator cores, wherein the number of the stator-core external convex blocks is equal to the number of the permanent magnets. The stator cores at the stator-core external convex blocks are respectively provided with a first axial through hole, and all the permanent magnets are correspondingly fixed in the first axial through holes. The rotor assembly comprises a motor shaft and a rotor core fixed on the motor shaft. K rotor external salient poles are arranged on the outer peripheral surface of the rotor core. The motor provided by the invention has the advantages of being small in starting current, large in torque, low in temperature rise, high in efficiency, high in utilization ratio of materials and low in control cost, and is efficient and energy-saving.

Description

Permanent magnet switched reluctance motor and stator module thereof

 

[ technical field]

The present invention relates to medium-sized or micro-machine, particularly include permanent magnet medium-sized or micro-machine, particularly relate to medium-sized or small-sized permanent magnet switched reluctance motor.

[ background technology]

Prior art electric motor car motor used comprises brush direct current motor, permanent magnetic brushless or switched reluctance machines; Wherein the brush of brush direct current motor is easy to wear, and efficiency is low; When permanent magnetic brushless starts, electric current is large, torque is little, under big current or high temperature, have demagnetization effects; And switched reluctance machines is operated in magnetic linkage rising portion, when rotating a circle electrical degree, winding only has the half of whole conduction time conduction time, and stock utilization is low, and the price comparison controlling power tube is expensive, height of controlling cost, and runs pulsation also large.

[ summary of the invention]

The technical problem to be solved in the present invention is avoid above-mentioned the deficiencies in the prior art part and provide a kind of permanent magnet switched reluctance motor and stator module thereof, this permanent magnet switched reluctance motor has that starting current is little, torque is large, temperature rise is low, efficiency is high, stock utilization is high and the advantage such as low of controlling cost, and is a kind of energy-efficient motor.

The technical scheme that the present invention solve the technical problem employing is:

A kind of permanent magnet switched reluctance motor is provided, comprise rotor assembly, rear end cap, front end housing, the fore bearing that is arranged on the rear bearing in the bearing chamber of rear end cap and is arranged in the bearing chamber of front end housing, and be fixed on the stator module between described rear end cap and front end housing, described stator module comprises stator core and the stator winding of hollow column, described rotor assembly comprises the rotor core and motor shaft that are provided with center through hole, and by the center through hole of described rotor core, described rotor core is axially fixed on described motor shaft, the motor shaft of described rotor assembly can be arranged on described front and back ends rotationally by described forward and backward bearing and cover, described stator module also comprises 2P block permanent magnet, wherein P is magnetic pole logarithm, P is positive integer, described stator core inner homogeneous is provided with M stator slot, M be more than or equal to 4 positive integer, be salient pole in stator between adjacent two stator slots, in each stator that described stator winding is arranged on described stator core on salient pole, described stator core outer circumference surface is outwards provided with the outer projection with the stator of described permanent magnet equivalent amount, the described stator core at the outer projection place of each this stator is evenly all provided with the first axially extending bore, each permanent magnet is fixed in each first axially extending bore of described stator core accordingly, on the outer circumference surface of described rotor core, axially evenly radial direction is provided with the outer salient pole of K bar rotor, wherein K be more than or equal to 2 positive integer, in the outer outer circumference surface of salient pole of each rotor of described rotor core and each stator of described stator core, the inner peripheral surface of salient pole forms minimum radial air gap.

The outer circumference surface of described rear end cap is outwards provided with the outer projection position relationship one_to_one corresponding with each stator of described stator core and equal the first outer projection of quantity, and each first outer projection is equipped with the first breach towards that end of described stator core and is positioned at the first rib of these the first breach both sides; The outer circumference surface of described front end housing is outwards provided with the outer projection position relationship one_to_one corresponding with each stator of described stator core and equal the second outer projection of quantity, and each second outer projection is equipped with the second breach towards that end of described stator core and is positioned at the second rib of these the second breach both sides; After the assembling of described permanent magnet switched reluctance motor, the outer projection two ends of each stator of described stator core are positioned at each second, first breach of described forward and backward end cap respectively accordingly, and by each second, the first gear margin system of each second, first breach both sides.

Above-mentioned M=1.5K, namely the quantity of described stator slot is 1.5 times of the outer number of salient poles of described rotor, and in described stator, the quantity of salient pole is also 1.5 times of the outer number of salient poles of described rotor.

Described stator winding comprises A phase winding, B phase winding and C phase winding, in each stator that this A phase winding, B phase winding and C phase winding are successively set on described stator core on salient pole.

Above-mentioned M=12, namely described stator slot is 12, and in described stator, salient pole is also 12; Above-mentioned K=8, namely the outer salient pole of described rotor has 8; Above-mentioned P=2, namely described permanent magnet has two to totally four pieces; Described A phase winding, B phase winding and C phase winding have four coils, in four coils of each phase winding are arranged on each correspondence of described stator core respectively in the stator of two, interval stator after salient pole on salient pole, four coils of each phase winding are cascaded successively.

Described permanent magnet switched reluctance motor also comprises six field effect transistor Q 1~ Q 6with six diode D 1~ D 6; Field effect transistor Q 1source electrode and field effect transistor Q 2drain electrode electrical connection after link together with the head end of A phase winding again, diode D 1positive pole and diode D 2negative electricity connect after also link together with the head end of A phase winding again; Field effect transistor Q 3source electrode and field effect transistor Q 4drain electrode electrical connection after link together with the head end of B phase winding again, diode D 3positive pole and diode D 4negative electricity connect after also link together with the head end of B phase winding again; Field effect transistor Q 5source electrode and field effect transistor Q 6drain electrode electrical connection after link together with the head end of C phase winding again, diode D 5positive pole and diode D 6negative electricity connect after also link together with the head end of C phase winding again; Field effect transistor Q 1drain electrode, diode D 1negative pole, field effect transistor Q 3drain electrode, diode D 3negative pole, field effect transistor Q 5drain electrode and diode D 5negative electricity connect after link together with the positive pole of DC power supply again; Field effect transistor Q 2source electrode, diode D 2positive pole, field effect transistor Q 4source electrode, diode D 4positive pole, field effect transistor Q 6source electrode and diode D 6positive pole electrical connection after link together with the negative pole of DC power supply again; The tail end of described A phase winding, B phase winding and C phase winding links together.

Described stator module also comprises annular circulating cooling pipe; The bottom of each stator slot of described stator core is axially provided with arc-shaped groove; Described rear end cap is provided with the 3rd breach and the 4th breach that supply the two ends tube head of described annular circulating cooling pipe to stretch out respectively; Described annular circulating cooling pipe is successively set in the arc-shaped groove of each stator slot of described stator core, and its two ends tube head stretches out from the 3rd breach of described rear end cap and the 4th breach respectively.

A kind of stator module of permanent magnet switched reluctance motor is also provided, comprises stator core and the stator winding of hollow column, described stator module also comprises 2P block permanent magnet, wherein P is magnetic pole logarithm, P is positive integer, described stator core inner homogeneous is provided with M stator slot, M be more than or equal to 4 positive integer, be salient pole in stator between adjacent two stator slots, in each stator that described stator winding is arranged on described stator core on salient pole, described stator core outer circumference surface is outwards provided with the outer projection with the stator of described permanent magnet equivalent amount, the described stator core at the outer projection place of each this stator is evenly all provided with the first axially extending bore, each permanent magnet is fixed in each first axially extending bore of described stator core accordingly.

Compared with the existing technology comparatively, the beneficial effect of permanent magnet switched reluctance motor of the present invention and stator module thereof is:

One, permanent magnet switched reluctance motor of the present invention is the advantage of the combination of permanent magnetic brushless and switched reluctance machines, both successions, can keep high efficiency in very wide power and the range of speeds; This characteristic is particularly applicable to the operation conditions of electric motor car, be conducive to improving the distance travelled of electric motor car and easily via the requirement adopting suitable control strategy and system to meet electric motor car four quadrant running, and strong stopping power can also be kept in high-speed cruising region;

Two, permanent magnet switched reluctance motor of the present invention has that starting current is little, torque is large;

Three, when rotating a circle electrical degree, the stator winding electrifying time is increased to 2/3 of whole conduction time by the half of prior art whole conduction time, and efficiency is higher;

Four, permanent magnet switched reluctance motor of the present invention is owing to being set directly at stator core by annular circulating cooling, make whole cooling effect of motor better, electric machine temperature rise is lower, and motor has good heat dissipation characteristics from inside to outside, thus larger power output can be obtained with less volume, efficiency is high;

Five, whole electric machine structure is compact, solid and reliable, is applicable to various rugged environment, has good adaptability;

Six, the price of the control power tube of whole motor is low, controls cost low.

In sum, permanent magnet switched reluctance motor of the present invention has that starting current is little, torque is large, temperature rise is low, efficiency is high, stock utilization is high and the advantage such as low of controlling cost, and is a kind of energy-efficient motor.

[ accompanying drawing explanation]

Fig. 1 is the axonometric projection schematic diagram of permanent magnet switched reluctance motor of the present invention;

Fig. 2 is the axonometric projection schematic diagram after permanent magnet switched reluctance motor shown in Fig. 1 decomposes, and does not draw stator winding in figure;

Fig. 3 is that schematic diagram is looked on the orthographic projection right side of permanent magnet switched reluctance motor shown in Fig. 1;

To be that the orthographic projection of permanent magnet switched reluctance motor shown in Fig. 1 is main look cross-sectional schematic to Fig. 4, do not draw stator winding in figure;

Fig. 5 is the axonometric projection schematic diagram of the stator module of described permanent magnet switched reluctance motor, only draws A phase winding in figure, does not draw B phase winding, C phase winding and annular circulating cooling pipe;

Fig. 6 is the axonometric projection schematic diagram of the stator core of described stator module;

Fig. 7 is the orthographic projection schematic front view of stator core shown in Fig. 6;

Fig. 8 is the axonometric projection schematic diagram of the rotor core of the rotor assembly of described permanent magnet switched reluctance motor;

Fig. 9 is the axonometric projection schematic diagram of the rear end cap of described permanent magnet switched reluctance motor;

Figure 10 is the axonometric projection schematic diagram of the front end housing of described permanent magnet switched reluctance motor;

Figure 11 is the simple circuit principle schematic of described permanent magnet switched reluctance motor.

[embodiment]

Below in conjunction with each accompanying drawing, the present invention is described in further detail.

See Fig. 1 to Figure 10, a kind of permanent magnet switched reluctance motor, comprise rotor assembly 20, rear end cap 30, front end housing 40, the fore bearing 60 that is arranged on the rear bearing 50 in the bearing chamber of rear end cap 30 and is arranged in the bearing chamber of front end housing 40, and be fixed on the stator module 10 between described rear end cap 30 and front end housing 40, described stator module 10 comprises stator core 11 and the stator winding 12 of hollow column, described rotor assembly 20 comprises the rotor core 21 and motor shaft 22 that are provided with center through hole 211, and by the center through hole 211 of described rotor core 21, described rotor core 21 is axially fixed on described motor shaft 22, the motor shaft 22 of described rotor assembly 20 can be arranged on described forward and backward end cap 40,30 by described forward and backward bearing 60,50 rotationally, described stator module 10 also comprises 2P block permanent magnet 13, wherein P is magnetic pole logarithm, P is positive integer, described stator core 11 inner homogeneous is provided with M stator slot 111, M be more than or equal to 4 positive integer, be salient pole 112 in stator between adjacent two stator slots 111, in each stator that described stator winding 12 is arranged on described stator core 11 on salient pole 112, described stator core 11 outer circumference surface is outwards provided with the outer projection 113 with the stator of described permanent magnet 13 equivalent amount, the described stator core 11 at outer projection 113 place of each this stator is evenly all provided with the first axially extending bore 114, each permanent magnet 13 is fixed in each first axially extending bore 114 of described stator core 11 accordingly, N, N, S, S pole is alternately arranged, see Fig. 5, also just say that the magnetic field of each permanent magnet 13 is by N, N, S, S pole is alternately arranged, on the outer circumference surface of described rotor core 21, axially evenly radial direction is provided with the outer salient pole 212 of K bar rotor, wherein K be more than or equal to 2 positive integer, in the outer outer circumference surface of salient pole 212 of each rotor of described rotor core 21 and each stator of described stator core 23, the inner peripheral surface of salient pole 112 forms minimum radial air gap.

See Fig. 1 to Fig. 3, Fig. 5 to Fig. 7, Fig. 9 and Figure 10, the outer circumference surface of described rear end cap 30 is outwards provided with the outer projection 113 position relationship one_to_one corresponding with each stator of described stator core 11 and equal the first outer projection 39 of quantity, and each first outer projection 39 is equipped with the first breach 391 towards that end of described stator core 11 and is positioned at the first rib 392 of these the first breach 391 both sides; The outer circumference surface of described front end housing 40 is outwards provided with the outer projection 113 position relationship one_to_one corresponding with each stator of described stator core 11 and equal the second outer projection 49 of quantity, and each second outer projection 49 is equipped with the second breach 491 towards that end of described stator core 11 and is positioned at the second rib 492 of these the second breach 491 both sides; After described permanent magnet switched reluctance motor assembling, outer projection 113 two ends of each stator of described stator core 11 are positioned at each second, first breach 491,391 of described forward and backward end cap 40,30 respectively accordingly, and are limited by each second, first rib 492,392 of each second, first breach 491,391 both sides.After motor assembling, each first outer projection 39 of described rear end cap 30 and each second outer projection 49 of described front end housing 40 can just block each permanent magnet 13 be fixed in each first axially extending bore 114 of described stator core 11, prevent each permanent magnet 13 from shifting out.

See Fig. 5 to Fig. 8, above-mentioned M=1.5K, namely the quantity of described stator slot 111 is 1.5 times of outer salient pole 212 quantity of described rotor, and in described stator, the quantity of salient pole 112 is also 1.5 times of outer salient pole 212 quantity of described rotor.

See Fig. 5 to Fig. 7 and Figure 11, described stator winding 12 comprises A phase winding 12A, B phase winding 12B and C phase winding 12C, in each stator that this A phase winding 12A, B phase winding 12B and C phase winding 12C is successively set on described stator core 11 on salient pole 112.

See Fig. 2 and Fig. 5 to Fig. 8, particularly, above-mentioned M=12, namely described stator slot 111 is 12, and in described stator, salient pole 112 is also 12; Above-mentioned K=8, namely the outer salient pole 212 of described rotor has 8; Above-mentioned P=2, namely described permanent magnet 13 has two to totally four pieces; Described A phase winding 12A, B phase winding 12B and C phase winding 12C has four coils, in four coils of each phase winding are arranged on each correspondence of described stator core 11 respectively in the stator of two, interval stator after salient pole 112 on salient pole 112, four coils of each phase winding are cascaded successively.See Fig. 5, situation on salient pole 112 in stator that A phase winding 12A is arranged on each correspondence of described stator core 11 is specifically described: because the quantity of salient pole 112 is 12 in the stator of described stator core 11, and described stator winding 12 is three-phase windings, therefore each phase winding should to there being salient pole 112 in 4 stators, A phase winding 12A has four coil 12A-1, 12A-2, 12A-3 and 12A-4, in first stator that first coil 12A-1 of A phase winding 12A is arranged on described stator core 11 on salient pole 112, in the 4th stator being arranged on described stator core 11 in second two, coil 12A-2 interval stator of A phase winding 12A after salient pole 112 on salient pole 112, in two stators at interval, salient pole 112 is used to each coil arranging B phase winding 12B and C phase winding 12C, in 3rd the coil 12A-3 of A phase winding 12A is arranged on described stator core 11 again in minor tick two stators the 7th stator after salient pole 112 on salient pole 112, in 4th the coil 12A-4 of A phase winding 12A is arranged on described stator core 11 once more in the stator of two, interval the tenth stator after salient pole 112 on salient pole 112, four coil 12A-1 of A phase winding 12A, 12A-2, 12A-3 and 12A-4 is cascaded successively, the head end 12A of the A phase winding 12A after series connection 1with tail end 12A 2draw from described stator core 11.Usually can must be equal with the quantity of the coil of each phase winding by the quantitative design of permanent magnet 13.

See Fig. 5 and Figure 11, described permanent magnet switched reluctance motor also comprises six field effect transistor Q 1~ Q 6with six diode D 1~ D 6; Field effect transistor Q 1source S and field effect transistor Q 2drain D electrical connection after again with the head end 12A of A phase winding 12A 1link together, diode D 1positive pole and diode D 2negative electricity connect after also again with the head end 12A of A phase winding 12A 1link together; Field effect transistor Q 3source S and field effect transistor Q 4drain D electrical connection after link together with the head end of B phase winding 12B again, diode D 3positive pole and diode D 4negative electricity connect after also link together with the head end of B phase winding 12B again; Field effect transistor Q 5source S and field effect transistor Q 6drain D electrical connection after link together with the head end of C phase winding 12C again, diode D 5positive pole and diode D 6negative electricity connect after also link together with the head end of C phase winding 12C again; Field effect transistor Q 1drain D, diode D 1negative pole, field effect transistor Q 3drain D, diode D 3negative pole, field effect transistor Q 5drain D and diode D 5negative electricity connect after link together with the positive pole of DC power supply again; Field effect transistor Q 2source S, diode D 2positive pole, field effect transistor Q 4source S, diode D 4positive pole, field effect transistor Q 6source S and diode D 6positive pole electrical connection after link together with the negative pole of DC power supply again; The tail end of described A phase winding 12A, B phase winding 12B and C phase winding 12C links together.Field effect transistor Q 1grid G, field effect transistor Q 2grid G, field effect transistor Q 3grid G, field effect transistor Q 4grid G, field effect transistor Q 5grid G and field effect transistor Q 6grid G be electrically connected with the trigger control circuit 70 of described permanent magnet switched reluctance motor, in order to see that figure is convenient, their connecting line is not drawn in Figure 11, only depict towards the six roots of sensation arrow index wire of each field effect transistor in trigger control circuit 70, the trigger control circuit 70 of described permanent magnet switched reluctance motor can adopt the trigger control circuit of prior art, does not repeat them here.Diode D in Figure 11 11, diode D 21, diode D 31, diode D 41, diode D 51with diode D 61field effect transistor Q respectively 1, field effect transistor Q 2, field effect transistor Q 3, field effect transistor Q 4, field effect transistor Q 5with field effect transistor Q 6interior protection diode.Diode D 1, diode D 2, diode D 3, diode D 4, diode D 5with diode D 6be fly-wheel diode, when described permanent magnet switched reluctance motor commutation, inductance back electromotive force is close to road use.

See Fig. 1 to Fig. 4, Fig. 6 and Fig. 7, in order to cooling effect of motor is better, electric machine temperature rise is lower, and described stator module 10 also comprises annular circulating cooling pipe 14; The bottom of each stator slot 111 of described stator core 11 is axially provided with arc-shaped groove 1111; Described rear end cap 30 is provided with the 3rd breach 38 and the 4th breach 37 that supply the two ends tube head 141,142 of described annular circulating cooling pipe 14 to stretch out respectively; Described annular circulating cooling pipe 14 is successively set in the arc-shaped groove 1111 of each stator slot 111 of described stator core 11, and its two ends tube head 141,142 stretches out from the 3rd breach 38 of described rear end cap 30 and the 4th breach 37 respectively.The two ends tube head 141,142 of described annular circulating cooling pipe 14, a conduct water inlet use, can be described as into water tube head 141, another can be described as water outlet tube head 142 as water outlet use.

See Fig. 2 and Fig. 4, label be 81 be rear bearing cover, this rear bearing cover 81 is fixed on rear end cap 30; Label be 82 be front bearing retainer, this front bearing retainer 82 is fixed on front end housing 40; Label be 83 be position encoded dish, this position encoded dish 83 is arranged on the rear end of motor shaft 22; Label be 84 be optoelectronic switch assembly, this optoelectronic switch assembly 84 is fixed on rear end cap 30; Position encoded dish 83 and optoelectronic switch assembly 84 form position detector 80, export energising and the power-off that low and high level controls each field effect transistor again behind the rotor core 21 of this position detector 80 detection rotor assembly 20 and position corresponding to the stator core 11 of stator module 10 by trigger control circuit 70.

Described permanent magnet 13 is neodymium iron boron high magnetic energy alloy or strontium or barium ferrite.

During use, due on rotor core 21 both without winding also without permanent magnet, only have in each stator of stator core 11 salient pole 112 to be wound with on concentratred winding and stator core 11 and be embedded with permanent magnet 13; Its operation logic is synthesized by two magnetic potential sources:

One, winding magnetic circuit, it follows magnetic resistance minimum principle, and magnetic flux always will close along the path that magnetic resistance is minimum; Produce tangential magnetic pull because of magnetic field distortion, when the outer salient pole 212 of each rotor of rotor core 21 misplaces with salient pole 112 in each stator of stator core 11, radial air gap is large, and now magnetic resistance is also large; Once the stator winding electrifying in each stator of stator core 11 on salient pole 112 will be formed play magnetic pull to the outer salient pole 212 of each rotor of rotor core 21, radial air gap is diminished, also magnetic circuit reluctance is made also to diminish, give each phase winding energising of the correspondence in each stator of stator core 11 on salient pole 112 or power-off in order, then rotor assembly 20 just rotates continuously;

Two, magnetic circuit, the magnetic flux of permanent magnet keeps constant, when the obstructed electric current of stator winding, the poised state that rotor assembly 20 is in torque all the time can not be rotated, forward current (magnetic field of permanent magnet can be strengthened) is passed to when giving the A phase winding of stator winding, negative current (magnetic field of permanent magnet can be weakened) is passed to the C phase winding of stator winding, suppose that electric current is equal, the outer salient pole 212 of each rotor that then A phase winding and C phase winding are corresponding respectively produces forward magnetic field reluctance torque Tm, total synthesis torque Ta=2Tm, therefore the stator winding electrifying time was increased to for 2/3 time by the prior art electrical degree of a week 1/2 time, after stator winding electrifying, stator winding absorbs electric energy from DC power supply, and during power-off, the electric current of stator winding is by sustained diode 1~ D 6by remaining energy feedback to DC power supply.

The above embodiment only have expressed the preferred embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention; It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention; Therefore, all equivalents of doing with the claims in the present invention scope and modification, all should belong to the covering scope of the claims in the present invention.

Claims (10)

1. a permanent magnet switched reluctance motor; comprise rotor assembly (20), rear end cap (30), front end housing (40), the fore bearing (60) that is arranged on the rear bearing (50) in the bearing chamber of rear end cap (30) and is arranged in the bearing chamber of front end housing (40), and be fixed on the stator module (10) between described rear end cap (30) and front end housing (40); Described stator module (10) comprises stator core (11) and the stator winding (12) of hollow column; Described rotor assembly (20) comprises the rotor core (21) and motor shaft (22) that are provided with center through hole (211); by the center through hole (211) of described rotor core (21), described rotor core (21) is axially fixed on described motor shaft (22); The motor shaft (22) of described rotor assembly (20) can be arranged on described forward and backward end cap (40,30) by described forward and backward bearing (60,50) rotationally; It is characterized in that:
Described stator module (10) also comprises 2P block permanent magnet (13), wherein P is magnetic pole logarithm, P is positive integer, described stator core (11) inner homogeneous is provided with M stator slot (111), M be more than or equal to 4 positive integer, it is salient pole (112) in stator between adjacent two stator slots (111), in each stator that described stator winding (12) is arranged on described stator core (11) on salient pole (112), described stator core (11) outer circumference surface is outwards provided with the outer projection (113) with the stator of described permanent magnet (13) equivalent amount, evenly all be provided with the first axially extending bore (114) the described stator core (11) at outer projection (113) place of each this stator is upper, each permanent magnet (13) is fixed in each first axially extending bore (114) of described stator core (11) accordingly, on the outer circumference surface of described rotor core (21), axially evenly radial direction is provided with the outer salient pole (212) of K bar rotor, wherein K be more than or equal to 2 positive integer, in the outer outer circumference surface of salient pole (212) of each rotor of described rotor core (21) and each stator of described stator core (23), the inner peripheral surface of salient pole (112) forms minimum radial air gap.
2. permanent magnet switched reluctance motor according to claim 1, is characterized in that:
The outer circumference surface of described rear end cap (30) is outwards provided with outer projection (113) the position relationship one_to_one corresponding with each stator of described stator core (11) and equal the first outer projection (39) of quantity, and each first outer projection (39) is equipped with the first breach (391) towards that end of described stator core (11) and is positioned at first rib (392) of these the first breach (391) both sides;
The outer circumference surface of described front end housing (40) is outwards provided with outer projection (113) the position relationship one_to_one corresponding with each stator of described stator core (11) and equal the second outer projection (49) of quantity, and each second outer projection (49) is equipped with the second breach (491) towards that end of described stator core (11) and is positioned at second rib (492) of these the second breach (491) both sides;
After described permanent magnet switched reluctance motor assembling, outer projection (113) two ends of each stator of described stator core (11) are positioned at each second, first breach (491,391) of described forward and backward end cap (40,30) respectively accordingly, and by each second, first rib (492,392) restriction of each second, first breach (491,391) both sides.
3. permanent magnet switched reluctance motor according to claim 1, is characterized in that:
M=1.5K, namely the quantity of described stator slot (111) is 1.5 times of outer salient pole (212) quantity of described rotor, and in described stator, the quantity of salient pole (112) is also 1.5 times of outer salient pole (212) quantity of described rotor.
4. permanent magnet switched reluctance motor according to claim 1, is characterized in that:
Described stator winding (12) comprises A phase winding (12A), B phase winding (12B) and C phase winding (12C), in each stator that this A phase winding (12A), B phase winding (12B) and C phase winding (12C) are successively set on described stator core (11) on salient pole (112).
5. permanent magnet switched reluctance motor according to claim 4, is characterized in that:
M=12, namely described stator slot (111) is 12, and in described stator, salient pole (112) is also 12; K=8, namely the outer salient pole (212) of described rotor has 8; P=2, namely described permanent magnet (13) has two to totally four pieces;
Described A phase winding (12A), B phase winding (12B) and C phase winding (12C) have four coils, in four coils of each phase winding are arranged on described stator core (11) each correspondence respectively in the stators of two, interval stator after salient pole (112) on salient pole (112), four coils of each phase winding are cascaded successively.
6. permanent magnet switched reluctance motor according to claim 4, is characterized in that:
Described permanent magnet switched reluctance motor also comprises six field effect transistor Q 1~ Q 6with six diode D 1~ D 6; Field effect transistor Q 1source electrode and field effect transistor Q 2drain electrode electrical connection after link together with the head end of A phase winding (12A) again, diode D 1positive pole and diode D 2negative electricity connect after also link together with the head end of A phase winding (12A) again; Field effect transistor Q 3source electrode and field effect transistor Q 4drain electrode electrical connection after link together with the head end of B phase winding (12B) again, diode D 3positive pole and diode D 4negative electricity connect after also link together with the head end of B phase winding (12B) again; Field effect transistor Q 5source electrode and field effect transistor Q 6drain electrode electrical connection after link together with the head end of C phase winding (12C) again, diode D 5positive pole and diode D 6negative electricity connect after also link together with the head end of C phase winding (12C) again; Field effect transistor Q 1drain electrode, diode D 1negative pole, field effect transistor Q 3drain electrode, diode D 3negative pole, field effect transistor Q 5drain electrode and diode D 5negative electricity connect after link together with the positive pole of DC power supply again; Field effect transistor Q 2source electrode, diode D 2positive pole, field effect transistor Q 4source electrode, diode D 4positive pole, field effect transistor Q 6source electrode and diode D 6positive pole electrical connection after link together with the negative pole of DC power supply again; The tail end of described A phase winding (12A), B phase winding (12B) and C phase winding (12C) links together.
7. the permanent magnet switched reluctance motor according to any one of claim 1 to 6, is characterized in that:
Described stator module (10) also comprises annular circulating cooling pipe (14); The bottom of each stator slot (111) of described stator core (11) is axially provided with arc-shaped groove (1111); Described rear end cap (30) is provided with the 3rd breach (38) and the 4th breach (37) that supply the two ends tube head of described annular circulating cooling pipe (14) to stretch out respectively; Described annular circulating cooling pipe (14) is successively set in the arc-shaped groove (1111) of each stator slot (111) of described stator core (11), and its two ends tube head stretches out from the 3rd breach (38) of described rear end cap (30) and the 4th breach (37) respectively.
8. a stator module for permanent magnet switched reluctance motor, comprises stator core (11) and the stator winding (12) of hollow column; It is characterized in that:
Described stator module (10) also comprises 2P block permanent magnet (13), wherein P is magnetic pole logarithm, P is positive integer, described stator core (11) inner homogeneous is provided with M stator slot (111), M be more than or equal to 4 positive integer, it is salient pole (112) in stator between adjacent two stator slots (111), in each stator that described stator winding is arranged on described stator core (11) on salient pole (112), described stator core (11) outer circumference surface is outwards provided with the outer projection (113) with the stator of described permanent magnet (13) equivalent amount, evenly all be provided with the first axially extending bore (114) the described stator core (11) at outer projection (113) place of each this stator is upper, each permanent magnet (13) is fixed in each first axially extending bore (114) of described stator core (11) accordingly.
9. the stator module of permanent magnet switched reluctance motor according to claim 8, is characterized in that:
Described stator winding (12) comprises A phase winding, B phase winding and C phase winding, in each stator that this A phase winding, B phase winding and C phase winding are successively set on described stator core (11) on salient pole (112).
10. the stator module of permanent magnet switched reluctance motor according to claim 8 or claim 9, is characterized in that:
Described stator module (10) also comprises annular circulating cooling pipe (14); The bottom of each stator slot (111) of described stator core (11) is axially provided with arc-shaped groove (1111); Described rear end cap (30) is provided with the 3rd breach (38) and the 4th breach (37) that supply the two ends tube head of described annular circulating cooling pipe (14) to stretch out respectively; Described annular circulating cooling pipe (14) is successively set in the arc-shaped groove (1111) of each stator slot (111) of described stator core (11), and its two ends tube head stretches out from the 3rd breach (38) of described rear end cap (30) and the 4th breach (37) respectively.
CN201410281636.8A 2014-06-23 2014-06-23 Permanent magnet switch reluctance machine and a stator assembly thereof CN104600944A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018042226A1 (en) * 2016-08-31 2018-03-08 Munjeri Tawanda Electric generator and electric power generation system
WO2020135981A1 (en) 2018-12-26 2020-07-02 Arcelik Anonim Sirketi A motor comprising a stator fixed to the casing

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CN103715853A (en) * 2014-01-03 2014-04-09 天津大学 Bearingless doubly-salient permanent-magnet switched reluctance motor with axial and radial hybrid excitation
CN103812241A (en) * 2014-03-13 2014-05-21 山东大学 Stator permanent magnet mixed stepping motor

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US5825112A (en) * 1992-08-06 1998-10-20 Electric Power Research Institute, Inc. Doubly salient motor with stationary permanent magnets
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018042226A1 (en) * 2016-08-31 2018-03-08 Munjeri Tawanda Electric generator and electric power generation system
WO2020135981A1 (en) 2018-12-26 2020-07-02 Arcelik Anonim Sirketi A motor comprising a stator fixed to the casing

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Application publication date: 20150506