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A Switched Reluctance Motor with Power Loss Self-locking Function

A technology of switched reluctance and electric motors, applied in the direction of magnetic circuit rotating parts, electrical components, electromechanical devices, etc., can solve the problems of potential safety hazards, consumption of friction materials, waste of electric energy, etc.

Active Publication Date: 2018-01-09
戴珊珊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The rotor salient poles of existing doubly salient switched reluctance motors are usually made of iron core materials. When the stator excitation coil has no excitation current, there is no force between the rotor salient poles and the stator salient poles. At this time, if To brake, you can only rely on the force of an external device, such as the friction braking force generated by the friction plate of the brake device acting on the surface of the moving object. This braking method not only consumes friction materials, but also wastes electric energy.
At the same time, there are security risks

Method used

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  • A Switched Reluctance Motor with Power Loss Self-locking Function
  • A Switched Reluctance Motor with Power Loss Self-locking Function
  • A Switched Reluctance Motor with Power Loss Self-locking Function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment is an outer rotor motor, and its specific structure is as attached Figure 4 attached Figure 5 And attached Figure 6 As shown, the number of "permanent magnet salient pole pairs" of the rotor in this embodiment is twice the number of "excitation salient pole pairs" of the stator, that is, M=2N, where M is twelve, N is six, and k is 2. An example is to solve the motor starting by biasing the two sets of rotor "permanent magnet salient pole pairs" structure.

[0062] Figure 4 It is a cross-sectional view of the structure of Embodiment 1. (For the convenience of explanation, the equilibrium state generated by the α angle is ignored, and the figure is the actual state for analysis). The stator is composed of a stator seat 206 and six "excitation salient pole pairs", and six "excitation pole pairs" The “salient pole pairs” take the rotation axis 208 as the axis of symmetry, and are arranged radially symmetrically on the periphery of the stator seat 206,...

Embodiment 2

[0068] The structure of this embodiment is as attached Figure 7-9 shown. The structure of this embodiment is basically the same as that of Embodiment 1, the only difference lies in the winding method and setting position of the excitation coils of the stator "excitation salient pole pairs". In this embodiment, the excitation coils are divided into two groups and wound in series on the salient poles of the iron core, so that the axial length of the motor can be shortened to meet special needs.

[0069] The asymmetric arrangement of the "permanent magnet salient pole pairs" of the rotor in this embodiment, the self-locking mechanism when the motor is powered off, the motor start-up, the operation process, and the automatic air cooling of the motor are the same as those in the first embodiment, and will not be repeated here.

Embodiment 3

[0071] This embodiment is an external rotor motor, the number M of rotor "salient pole pairs" is twice the number N of stator "salient pole pairs", that is, M is 10, N is 5, and k is 2.

[0072] In this embodiment, a structural form of biasing a stator excitation salient pole pair can be adopted to solve the problem of starting the motor. Figure 10 The structural section of this kind of bias mode motor. In the figure, the relative position of the stator and the rotor is an initial state when the motor is de-energized, that is, the self-locking state, and the four excitation salient pole pairs A, C, D, E are respectively facing the permanent magnet salient pole pair I on the rotor. , Ⅴ, Ⅶ, Ⅸ, and there is an offset α-degree central angle between the salient pole radial centerline of stator excitation salient pole pair B and the salient pole radial centerline of rotor permanent magnet salient pole pair Ⅲ. Another initial state in the case of power failure of the motor in this ...

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Abstract

The invention relates to a switched reluctance motor with power-off self-locking function. The motor stator includes N "excitation salient pole pairs", and the rotor includes M "permanent magnet salient pole pairs". N is a natural number greater than or equal to 2. M is an even number greater than or equal to 2, M=kN, when N is an odd number, k is an even number, and when N is an even number, k is a natural number. In the case of power failure, "excitation salient pole pairs" and "permanent magnet salient pole pairs" form Close the magnetic circuit, even if the motor is in self-locking state. In order to enable the motor to start normally, the present invention adopts a "radial asymmetrical" structural design of individual "excitation salient pole pairs" on the stator or individual "permanent magnet salient pole pairs" on the rotor, that is, in k kinds of self-locking states There is always a stator "excitation salient pole pair" salient pole and a rotor "permanent magnet salient pole pair" salient poles with a relative misalignment offset, so as to ensure that the motor can start in a certain direction of rotation. The self-locking force of the motor in the power-off state of the invention is extremely strong, and the excitation control method is simple and reliable.

Description

technical field [0001] The invention relates to the technical field of switched reluctance motors, in particular to a switched reluctance motor with a power-off self-locking function. Background technique [0002] The rotor salient poles of existing double salient pole switched reluctance motors are usually made of iron core materials. When the stator excitation coil has no excitation current, there is no force between the rotor salient poles and the stator salient poles. At this time, if To brake, you can only rely on the force of an external device, such as the friction braking force generated by the friction plate of the brake device acting on the surface of the moving object. This braking method consumes both friction materials and electric energy. At the same time, there are potential safety hazards. [0003] At present, in the practical application of motors, there is a type of motor that needs to be started and braked frequently, such as elevator traction motors, aut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K29/00H02K1/14H02K1/24
Inventor 戴珊珊司雷明朱石柱应展烽
Owner 戴珊珊
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