Stator permanent magnet adjustable-magnetic-flux motor with adjustable-magnetic-flux ring capable of axially translating

Abstract

The utility model relates to a stator permanent magnet adjustable magnetic flux motor with an adjustable magnetic flux ring capable of axially translating, which comprises a salient pole rotor, a stator and an adjustable magnetic flux ring, and is characterized in that the stator comprises an armature winding, a stator iron core and permanent magnet steel, and the salient pole rotor, the stator and the adjustable magnetic flux ring are coaxially arranged; the magnetism adjusting ring is made of a magnetic conductive material and is positioned on the outer side of the stator iron core; the axial position between the salient pole rotor and the stator is relatively unchanged, and the axial position between the magnetic field adjusting ring and the salient pole rotor can be adjusted at will. By arranging the adjusting translation device, the axial relative position of the magnet adjusting ring and the salient pole rotor can be adjusted according to different application scene requirements of the motor, so that the no-load magnetic field and the no-load back electromotive force of the motor are adjusted, and the permanent magnet synchronous motor has the advantages of simplicity in magnet adjustment, low idle loss, simple structure, high reliability and the like; the method is especially suitable for power system energy storage motors and synchronous phase modulation motors.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of magnetic regulating motor, concretely relates to a kind of stator permanent-magnetic magnetic regulating motor of axial translation of magnetic regulating ring, it is applicable to power system energy storage motor and synchronous phase-modulating motor. BACKGROUND

[0002] Compared with the conventional rotor excitation permanent-magnetic motor, the stator excitation permanent-magnetic motor has the advantages of simple rotor structure and high reliability, and is widely used in new energy power systems. According to whether the air gap magnetic field is adjustable, the stator excitation permanent-magnetic motor is divided into a magnetic regulating motor and a non-adjustable magnetic motor. The air gap magnetic field of the magnetic regulating motor has good adjustment performance, and has more advantages than the non-adjustable magnetic motor. At present, the magnetic regulating motor of the stator excitation permanent-magnetic motor generally has the problem of low reliability due to the complexity of the magnetic regulating device.

[0003] Therefore, the utility model provides a kind of stator permanent-magnetic magnetic regulating motor of axial translation of magnetic regulating ring, can adjust the no-load magnetic field and no-load back electromotive force of motor, with the advantages of simple structure, high reliability, simple magnetic regulation, and low motor loss, and is very suitable for power system energy storage motor and synchronous phase-modulating motor. SUMMARY

[0004] The utility model provides a kind of stator permanent-magnetic magnetic regulating motor of axial translation of magnetic regulating ring.

[0005] The specific technical scheme of the utility model is as follows: a kind of stator permanent-magnetic magnetic regulating motor of axial translation of magnetic regulating ring, including salient pole rotor, stator and magnetic regulating ring, the stator includes armature winding, stator core and permanent magnet, the salient pole rotor, stator and magnetic regulating ring are coaxially arranged;The magnetic regulating ring is made of magnetic conductive material and located outside the stator core;The axial position between the salient pole rotor and the stator is relatively unchanged, and the axial position between the magnetic regulating ring and the salient pole rotor can be adjusted arbitrarily.

[0006] Further, preferably, one end of the magnetic regulating ring is connected with an adjusting translation device, and the axial relative position between the magnetic regulating ring and the salient pole rotor can be adjusted by the adjusting translation device, so as to adjust the no-load magnetic field and no-load back electromotive force of the motor.

[0007] Further, preferably, the adjusting translation device includes an end ring, a lead screw and a stepper motor, the end ring is connected to the axial end face of the magnetic regulating ring, one end of the end ring is connected to the lead screw, and the lead screw passes through the stepper motor and is connected to the end cover.

[0008] Further, preferably, the end ring is a circular ring, and the circular ring cross section is connected to the axial end face of the magnetic regulating ring.

[0009] Further, preferably, an oil film paper is arranged between the magnetic regulating ring and the stator core.

[0010] Further, preferably, the thickness of the oil film paper is 0.2 mm.

[0011] Further, preferably, the salient pole rotor is located inside or outside the stator.

[0012] The utility model discloses the beneficial effect is: the utility model discloses through setting up adjusting translation device, can adjust the axial relative position of the flux modulation ring and salient pole rotor according to the different application scene demand of motor, thereby adjusting the no -load magnetic field and no -load counter electromotive force of motor, has the advantages such as simple flux modulation, idling machine loss is low, simple structure, reliability is high, especially applicable to power system energy storage motor and synchronous phase modulation motor. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structural schematic diagram of the utility model;

[0014] Figure 2 It is the A-A section view of Figure 1

[0015] Figure 3 It is the B-B section view of motor part; Figure 1

[0016] Figure 4 It is the motor cross section schematic diagram of double salient pole stator permanent magnet motor scheme;

[0017] Figure 5 It is the relationship diagram of motor no -load line counter electromotive force effective value and flux modulation ring axial displacement;

[0018] Figure 6 It is the relationship diagram of motor no -load iron consumption and flux modulation ring axial displacement;

[0019] In the drawing: 1-salient pole rotor;2-flux modulation ring;301-armature winding, 302-stator core, 303-permanent magnet magnetic steel;401-end ring, 402-screw rod, 403-step motor;5-end cover. DETAILED DESCRIPTION

[0020] In order to make the technical problem, technical scheme that the utility model solves more clearly clear, the following is combined with the embodiment, and the utility model is further detailedly explained. It should be understood that the specific embodiment described here is only for explaining the utility model, and is not for limiting the utility model.

[0021] ​​In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0022] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements, and the specific meaning of the above terms in the utility model can be understood according to specific circumstances for ordinary skilled persons in the art.

[0023] As shown in Figures 1 to 3 The utility model provides a kind of permanent magnet stator magnetic regulating motor of magnetic regulating ring axial translation, including salient pole rotor 1, stator and magnetic regulating ring 2, the stator includes armature winding 301, stator core 302 and permanent magnet 303, the salient pole rotor 1, stator and magnetic regulating ring 2 are coaxially arranged;The magnetic regulating ring 2 is magnetically conductive material, and located stator core 302 outside;The axial position between the salient pole rotor 1 and stator is relatively invariable, but radial position can be that salient pole rotor 1 is located stator inside or stator outside, the axial position between the magnetic regulating ring 2 and salient pole rotor 1 can be adjusted arbitrarily.

[0024] Specifically, adjusting translation device is connected at one end of magnetic regulating ring 2, and the axial relative position between magnetic regulating ring 2 salient pole rotor 1 can be adjusted by adjusting translation device.

[0025] As preferred, the adjusting translation device includes end ring 401, screw rod 402 and step motor 403, end ring 401 is circular, and circular cross section is connected with the axial end surface of magnetic regulating ring 2, and one end of end ring 401 is connected with screw rod 402, screw rod 402 passes through step motor 403 and is connected to end cover 5.Step motor 403 is started, can drive screw rod 402 to move back and forth, thereby drive magnetic regulating ring 2 to move back and forth along axial direction, adjust the axial relative position between magnetic regulating ring 2 and salient pole rotor 1, adjust the no-load magnetic field and no-load back emf of motor.

[0026] As preferred, oil film paper is arranged between the magnetic regulating ring 2 and stator core 302, and the thickness of oil film paper is 0.2mm, can make the no-load iron loss of motor standby as small as possible.Oil film paper is also convenient for adjusting translation device to adjust the axial position of magnetic regulating ring 2.

[0027] When the motor is used for power system synchronous phase modulation motor, the motor works as follows: the armature winding 301 of the motor stator is connected to the power grid, and the motor input active power is always zero when the motor output shaft is idle, the motor loss and the rotor mechanical transient process are ignored. By adjusting the axial relative position of the magnetic modulation ring 2 and the salient pole rotor 1 through the translation device, the no-load back electromotive force effective value of the motor can be adjusted, so that the reactive power of the motor can be adjusted arbitrarily.

[0028] When the motor is used for power system energy storage motor, the motor works as follows: when the motor idles, the axial position of the magnetic modulation ring 2 is adjusted through the translation device, so that the magnetic modulation ring 2 is completely overlapped with the salient pole rotor 1 in the axial direction, the magnetic motive force of the permanent magnet magnetic steel 303 is short-circuited, the motor no-load magnetic field is very small, and the motor no-load loss can be effectively reduced; when the motor needs to be accelerated or generate electricity, the axial position of the magnetic modulation ring 2 is adjusted through the translation device, so that the magnetic modulation ring 2 is completely staggered with the salient pole rotor 1 in the axial direction, the influence of the magnetic modulation ring 2 on the magnetic circuit of the motor is removed, and the motor no-load back electromotive force is a normal value.

[0029] As preferred, when the motor is used for power system energy storage motor, the salient pole rotor 1 of the motor is located on the outer side, and the stator is located on the inner side. In order to reduce the standby no-load iron loss, the motor should adopt the scheme of double salient pole stator permanent magnet motor (as shown in Figure 4 ).

[0030] It should be further pointed out that, in addition to the radial magnetic field structure shown in Figure 1 , the motor of the utility model can also adopt an axial magnetic field structure. When the salient pole rotor 1 is located on the outer side of the stator, the magnetic modulation ring 2 is located on the inner side of the stator.

[0031] In order to verify the effect of the utility model, a force finite element simulation model is established for simulation calculation. Taking a double salient pole inner rotor stator permanent magnet motor as an example, the relationship between the no-load line back electromotive force effective value and the no-load iron loss of the stator permanent magnet magnetic modulation motor and the axial displacement of the magnetic modulation ring obtained by simulation are respectively shown in Figure 5 、 Figure 6 . It can be seen that the motor no-load back electromotive force effective value has good adjustable performance, the no-load iron loss of the stator permanent magnet magnetic modulation motor can be close to zero at the lowest, and therefore the motor is particularly suitable for power system energy storage motor and synchronous phase modulation motor.

[0032] The utility model is described in detail through specific and preferred embodiments above, but those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and any modification, equivalent replacement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A permanent magnet adjustable motor with an axially translatable adjusting magnetic ring, comprising a salient pole rotor (1), a stator, and an adjusting magnetic ring (2), wherein the stator comprises an armature winding (301), a stator core (302), and a permanent magnet (303), characterized in that: The salient pole rotor (1), stator and adjusting ring (2) are arranged coaxially; the adjusting ring (2) is made of magnetic material and is located outside the stator core (302); the axial position between the salient pole rotor (1) and the stator remains relatively constant, and the axial position between the adjusting ring (2) and the salient pole rotor (1) can be arbitrarily adjusted.

2. The stator permanent magnet adjustable motor with an axially translatable adjusting magnetic ring according to claim 1, characterized in that, One end of the adjusting magnetic ring (2) is connected to an adjusting translation device, which can adjust the axial relative position between the adjusting magnetic ring (2) and the salient pole rotor (1).

3. A stator permanent magnet adjustable motor with an axially translatable adjusting magnetic ring according to claim 2, characterized in that, The adjustment and translation device includes an end ring (401), a lead screw (402) and a stepper motor (403). The end ring (401) is connected to the axial end face of the magnetic adjustment ring (2), and one end of the end ring (401) is connected to the lead screw (402). The lead screw (402) passes through the stepper motor (403) and is connected to the end cover (5).

4. A stator permanent magnet adjustable motor with an axially translatable adjusting magnetic ring according to claim 3, characterized in that, The end ring (401) is circular, and the circular cross section is connected to the axial end face of the magnetic adjustment ring (2).

5. A stator permanent magnet adjustable motor with an axially translatable adjusting magnetic ring according to any one of claims 1-4, characterized in that, An oil film paper is provided between the adjusting magnetic ring (2) and the stator core (302).

6. A stator permanent magnet adjustable motor with an axially translatable adjusting magnetic ring according to claim 5, characterized in that, The thickness of the oil film paper is 0.2 mm.

7. A stator permanent magnet adjustable motor with an axially translatable adjusting magnetic ring according to any one of claims 1-4, characterized in that, The salient pole rotor (1) is located inside or outside the stator.

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