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Stator magnetic pole structure of switched reluctance motor with direct-current excitation

A switched reluctance motor, stator magnetic pole technology, applied in the shape/pattern/structure of magnetic circuit, shape/pattern/structure of winding conductor, magnetic circuit, etc., to reduce torque ripple and reduce iron loss

Pending Publication Date: 2021-07-27
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to reduce the torque ripple of the switched reluctance motor with DC excitation, and to invent a new stator pole structure and its design method, which can effectively reduce the torque output of the motor while not significantly reducing the torque output. Torque ripple

Method used

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  • Stator magnetic pole structure of switched reluctance motor with direct-current excitation
  • Stator magnetic pole structure of switched reluctance motor with direct-current excitation
  • Stator magnetic pole structure of switched reluctance motor with direct-current excitation

Examples

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Embodiment Construction

[0020] Take a three-phase 12 / 8-pole motor with DC excitation as an example. Select the stator pole arc angle β s =15°, rotor pole arc angle β r =17°, the included angle between the pole body of the stator and the pole piece θ=90°, the height of the pole piece h p =2.3mm, Δβ s =2.0~3.0°.

[0021] Table 1 Comparison of motor performance indicators

[0022]

[0023] The performance of a three-phase 12 / 8-pole motor with DC excitation varies with Δβ s changes such as image 3 As shown, it can be seen from the figure that with Δβ s The torque ripple and iron loss of the motor decreased significantly with the increase of Δβ s =2.0~3.0°, the decrease is more obvious. The performance comparison of the three-phase 12 / 8-pole motor with DC excitation using the stator pole structure with pole shoes is shown in Table 1. It can be seen from the table that in Δβ s =2.0°, the torque drop is not obvious, and the torque ripple is about 1 / 2 of that without pole shoes; at Δβ s When =2...

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Abstract

The invention provides a stator magnetic pole structure of a switched reluctance motor with direct-current excitation, and belongs to the field of design of switched reluctance motors with direct-current excitation. Pole shoes are arranged on two sides of the inner end part of the stator magnetic pole structure, the tops of the pole shoes are straight lines, the included angle between the pole shoes and the pole body is theta, and the height of the pole shoes is hp; the pole arc angle increment of the pole shoe is defined as delta beta s = (beta's - beta s) / 2; in the formula, beta s is the pole arc angle of the pole body part, and beta's is the pole arc angle of the bottom of the pole shoe; and according to the design of the pole arc angle increment delta beta s, the included angle theta between the pole body and the pole shoe is 90 DEG, the height hp of the pole shoe is 2-3 mm, and the delta beta s is 2.0-3.0 DEG. According to the invention, the torque pulsation of the motor can be effectively reduced while the torque output is not obviously reduced, and the loss is reduced.

Description

technical field [0001] The invention belongs to the design field of switched reluctance motors with DC excitation, and relates to a novel stator magnetic pole structure and a design method of a switched reluctance motor with DC excitation. Background technique [0002] The switched reluctance motor with DC excitation is a double salient pole synchronous motor with stator excitation. It is developed on the basis of the switched reluctance motor. In addition to the original armature winding, a set of DC excitation winding is added, and both sets of windings adopt the form of concentrated winding. [0003] The switched reluctance motor with DC excitation inherits the advantages of simple and reliable structure of the switched reluctance motor; the vector control method of the permanent magnet synchronous motor can obtain good static and dynamic characteristics, and reduce the cost and volume of the controller; it can also Wide speed regulation operation can be realized by adju...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/14H02K3/18H02K3/28
CPCH02K1/146H02K3/18H02K3/28H02K2213/03
Inventor 娄伟孙建忠章萌张莉
Owner DALIAN UNIV OF TECH
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