CN103001434A - Magnetized salient pole type mixed excitation synchronous motor - Google Patents

Magnetized salient pole type mixed excitation synchronous motor Download PDF

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Publication number
CN103001434A
CN103001434A CN2011102727017A CN201110272701A CN103001434A CN 103001434 A CN103001434 A CN 103001434A CN 2011102727017 A CN2011102727017 A CN 2011102727017A CN 201110272701 A CN201110272701 A CN 201110272701A CN 103001434 A CN103001434 A CN 103001434A
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CN
China
Prior art keywords
magnetic
rotor
synchronous motor
stator
salient pole
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CN2011102727017A
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Chinese (zh)
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CN103001434B (en
Inventor
应红亮
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SHANGHAI AUTOMOBILE EORIVE CO Ltd
Shanghai Automobile Eorive Engineering Technology Research Center Co ltd
SHANGHAI ELECTRIC DRIVE CO Ltd
Original Assignee
SHANGHAI AUTOMOBILE EORIVE CO Ltd
Shanghai Automobile Eorive Engineering Technology Research Center Co ltd
SHANGHAI ELECTRIC DRIVE CO Ltd
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Priority to CN201110272701.7A priority Critical patent/CN103001434B/en
Publication of CN103001434A publication Critical patent/CN103001434A/en
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Abstract

A magnetized salient pole type mixed excitation synchronous motor mainly comprises a stator and a rotor, wherein the stator is of structure identical with that of a stator of a conventional permanent-magnet synchronous motor, the rotor is similar to a rotor of a salient pole type excitation synchronous rotor in shape and provided with an electromagnetic winding, and quadrature axis air gap is larger than direct axis air gap. Each magnet pole of the rotor is respectively provided with two 'V'-shaped magnetic steel grooves, steel magnets with same polarity are respectively disposed in the magnetic steel grooves, and finally, the double 'V'-shaped mixed excitation magnetic pole structure with quadrature axis magnetic resistance higher than direct axis magnetic resistance. By means of the excitation magnetic winding, induced potential can be directly adjusted, and irreversible demagnetization on the steel magnets can be avoided. Further, on the condition of applying quadrature axis current and magnetizing direct axis current at the same time, magnetized magnetic resistance torque component can be generated so as to increase torque density of the motor.

Description

Increase magnetic type salient pole type hybrid exciting synchronous motor
Technical field
The present invention relates to a kind of motor, relate in particular to and a kind ofly can control air-gap field by epitrochanterian electric excitation winding, and have the hybrid exciting synchronous motor that increases magnetic type reluctance torque.
Background technology
Mixed excitation electric machine has been gathered the characteristics of magneto and electro-magnetic motor, can be simply, flexibly, regulating electric machine air-gap field economically, change the characteristics of winding induced potential.Yet general mixed excitation electric machine is difficult to compare with traditional magneto in the power density index, and because the structure of more complicated causes difficulty of processing larger, and practical value is less, does not therefore basically also realize the mixed excitation electric machine of batch production.
General ipm motor rotor structure is the d-axis inductance less than handing over the axle inductance, and salient pole type electricity excitation rotor then is the d-axis inductance greater than handing over the axle inductance.Apply in the situation of the direct-axis current of handing over shaft current and weak magnetic effect, the IPM rotor can produce the weak magnetic resistive torque of forward, and electric excitation rotor produces reverse reluctance torque, so these two kinds of rotor structures are difficult to be unified in the mixed excitation electric machine.
In addition, the weak magnetic resistive torque that general ipm motor produces has certain side effect: 1) general ipm motor rotor, and hand over the axle inductance larger, therefore hand over the armature reaction of axle quite violent, this can have a strong impact on the sine of field waveform; 2) in order to produce the torque of forward, have the weak magnetic direct-axis current of certain amplitude, when weakening fundamental magnetic potential, also can cause increasing of magnetic field harmonic component simultaneously; 3) weak magnetic direct-axis current can produce very strong demagnetizing effect to magnet steel, to the safety generation threat of magnet steel.
So, if the d-axis inductance is arranged greater than handing over axle inductance IPM rotor, just can produce the reluctance torque that increases magnetic of forward, be to increase the magnetic direct-axis current and hand over shaft current owing to what at this moment apply, there is not the side effect of weak magnetic resistive torque.In addition, such IPM rotor and salient pole type electricity excitation rotor have good consistency in nature in reluctance torque, can well merge.
Summary of the invention
Purpose of the present invention, the problem that exists in order to solve above-mentioned prior art exactly provides a kind of hybrid exciting synchronous motor that increases the magnetic resistive torque that has.
In order to achieve the above object, the present invention has adopted following technical scheme: a kind of magnetic type salient pole type hybrid exciting synchronous motor that increases, mainly comprise stator and rotor, and described stator adopts the stator identical with conventional permanent-magnetic synchronous motor stator structure; Described rotor is similar to salient pole type electric excitation synchronous motor rotor profile, has electric excitation winding and hands over the axle air gap greater than the d-axis air gap; Be designed with respectively two " V " font magnet steel grooves on each magnetic pole of rotor, place respectively the magnet steel of same polarity in the magnet steel groove, finally form quadrature-axis reluctance greater than the composite excitation field structure of two " V " fonts of direct axis reluctance.
Leave wider muscle between described two " V " font magnet steel grooves, so that the magnetic potential that electric excitation winding produces can be passed through this muscle easily, exciting power is minimized.
Flux control principle of the present invention can in conjunction with Fig. 3 a), Fig. 3 b), Fig. 3 c) be described as follows:
By size of current and the direction of regulating electric excitation winding, can regulate the Distribution of Magnetic Field of rotor field, thereby affect the size of air-gap field.Be in zero the situation, to have certain vacancy in the middle of the unloaded air gap flux density waveform when electric exciting current, as Fig. 3 a) shown in; When applying when increasing the magnetic exciting current, the vacancy in the middle of the unloaded air gap flux density waveform can be filled, such as Fig. 3 b) shown in; When applying weak magnetic exciting current, pars intermedia branch and the both sides of unloaded air gap flux density waveform are opposite, such as Fig. 3 c) shown in.
D-axis inductance of the present invention can be as follows in conjunction with Fig. 4, Fig. 5 greater than the principle of handing over the axle inductance:
Rotor profile of the present invention adopts the profile similar to salient pole type electric excitation synchronous motor rotor, hands over the axle air gap greater than the situation of d-axis air gap thereby consisted of.
Rotor of the present invention is owing to be designed with respectively two " V " font magnet steel grooves on each rotor magnetic pole, thereby further promoted the situation of quadrature-axis reluctance greater than direct axis reluctance.
Be illustrated in figure 4 as the friendship axle magnetic circuit of motor, shown in Figure 5 then is the d-axis magnetic circuit of motor, as seen hands over the magnetic resistance of the relative d-axis magnetic circuit of magnetic resistance of axle magnetic circuit can be much larger, so d-axis inductance of the present invention can be greater than handing over the axle inductance.
The present invention increases magnetic type salient pole type hybrid exciting synchronous motor owing to adopted above technical scheme, has following advantage and disadvantage:
1, because waveforms amplitude and the shape in magnetic field are controlled, the adjustable extent of induced potential is broad;
2, the magnetic potential of DC excitation winding generation can not exert an influence to the working point of magnet steel substantially, thereby can not produce to permanent magnet the danger of irreversible demagnetization;
3, quadrature axis armature reaction is lighter, and the symmetry in magnetic field is better under the load;
4, for producing the reluctance torque of forward, can apply the direct-axis current that increases magnetic, the demagnetizing effect that this has been avoided the magnet steel generation has further strengthened the fail safe of magnet steel;
What 5, apply increases the magnetic direct-axis current, when electric excitation magnetic potential is not enough, can produces fundamental wave magnetic field and replenish, and the ipm motor that the sine of the load back-emf of formation is more general is better;
6, be integrated on the same rotor owing to electric excitation winding, so the structure relative compact;
7, structure realization property is better, easily realizes mass production.
Description of drawings
Fig. 1 is the axial sectional structure schematic diagram that the present invention increases magnetic type salient pole type hybrid exciting synchronous motor;
Fig. 2 is the cross-sectional structure schematic diagram of rotor;
Fig. 3 a), Fig. 3 b), Fig. 3 c) be the air gap flux density waveform schematic diagram of various excitation situations;
Fig. 4 is the friendship axle magnetic circuit schematic diagram of motor;
Fig. 5 is the d-axis magnetic circuit schematic diagram of motor.
Embodiment
Referring to Fig. 1, Fig. 2, the present invention increases magnetic type salient pole type hybrid exciting synchronous motor, comprises axle 1, bearing 2, front end housing 3, stator winding 4, casing 5, stator core 6, rotor core 7, permanent magnetic steel 15, rotor press plate 8, electric excitation winding 9, rear end cap 10, junction box assembly 11, resolver 12, brush 13 and brush terminal box 14.
Stator core 6 among the present invention and stator winding 4 adopt conventional permanent-magnetic synchronous motor stator structure; Rotor core 7 is similar to salient pole type electric excitation synchronous motor rotor profile, has electric excitation winding and hands over the axle air gap greater than the d-axis air gap.
Be designed with respectively two " V " font magnet steel grooves on each rotor magnetic pole of rotor core 7 among the present invention, place respectively the magnet steel 15 of same polarity in the magnet steel groove, form quadrature-axis reluctance greater than the permanent magnetism magnetic pole structure of two " V " fonts of direct axis reluctance.Leave wider muscle 16 between the two magnet steel grooves, so that the magnetic potential that electric excitation winding produces can be passed through this muscle easily, exciting power is minimized.Should be noted designing every magnetic bridge of two " V " font magnetic poles, subtract trochantinian magnetic leakage factor at first as far as possible, secondly note making it to play and increase the magnetic resistance effect of handing over the axle magnetic circuit, flow out enough spaces to middle muscle at last, power supply excitation winding magnetic potential is by this magnetic circuit.

Claims (2)

1. one kind increases magnetic type salient pole type hybrid exciting synchronous motor, mainly comprises stator and rotor, it is characterized in that: described stator adopts the stator identical with conventional permanent-magnetic synchronous motor stator structure; Described rotor is similar to salient pole type electric excitation synchronous motor rotor profile, has electric excitation winding and hands over the axle air gap greater than the d-axis air gap; Be designed with respectively two " V " font magnet steel grooves on each magnetic pole of rotor, place respectively the magnet steel of same polarity in the magnet steel groove, finally form quadrature-axis reluctance greater than the composite excitation field structure of two " V " fonts of direct axis reluctance.
2. the magnetic type salient pole type hybrid exciting synchronous motor that increases as claimed in claim 1, it is characterized in that: leave wider muscle between described two " V " font magnet steel grooves, so that the magnetic potential that electric excitation winding produces can be passed through this muscle easily, exciting power is minimized.
CN201110272701.7A 2011-09-15 2011-09-15 Increase magnetic-type salient pole type hybrid exciting synchronous motor Active CN103001434B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201110272701.7A CN103001434B (en) 2011-09-15 2011-09-15 Increase magnetic-type salient pole type hybrid exciting synchronous motor

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