Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Novel wound rotor brushless doubly-fed motor

A technology of wound rotor and doubly-fed motor, applied in the shape/style/structure of the winding conductor, can solve the problems of high air-gap magnetic density harmonic components, less rotor winding phases, and poor motor performance, etc., to achieve high Fundamental winding coefficients, simple design steps, and the effect of low harmonic content

Pending Publication Date: 2020-08-18
潘卫东
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional wire-wound rotor winding arrangement scheme is mainly obtained by the tooth harmonic method proposed by the patent number "CN101510702B" and the patent number "CN202276216U". The design process of this method is complicated and the phase number of the rotor winding depends on the number of pole pairs p p and p c , the tooth harmonic method is mainly used in the modulation mode and the modulation mode, in which case the speed of the brushless doubly-fed motor is low
When the tooth harmonic method is applied to the differential modulation mode, the number of phases of the rotor winding is small, the harmonic components of the air-gap flux density are high, and the performance of the motor is poor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Novel wound rotor brushless doubly-fed motor
  • Novel wound rotor brushless doubly-fed motor
  • Novel wound rotor brushless doubly-fed motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The implementation of the present invention is described below with the design examples under the sum modulation mode and the difference modulation mode respectively:

[0029] 1. Implementation example in and modulation mode:

[0030] A new three-phase Y-connected wound rotor brushless doubly-fed motor, the number of pole pairs of power winding p p =1, the number of pole pairs of the control winding p c = 3, and the design steps of the rotor winding in modulation mode are:

[0031] (1) First place two sets of pole pairs on the rotor with p p = 1 and p c = 3 windings, the number of slots per pole and phase of the two sets of windings is an integer, according to the relationship: Z r =6k[p p ,p c ], take the number of rotor slots Z r =54. In order to reduce the harmonic magnetomotive force generated by the rotor windings, both sets of windings adopt double-layer short-pitch windings. The pitch of the coils of 1 pair of poles is 23, and the pitch of 3 pairs of pole...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a novel wound rotor brushless doubly-fed motor, which belongs to the technical field of motors, and a stator adopts two sets of three-phase windings of which the number of polepairs is pp and pc respectively; the rotor adopts a set of three-phase winding, all coils in each phase of winding are sequentially connected in series according to a slot number sequence, the threephases of windings are connected in a Y shape, equivalent transformation is carried out on the ampere-conductance current in a rotor slot, redundant coils are eliminated, and then the turn ratios among the coils of the rotor winding are different. The design steps are simple, the novel wound rotor brushless doubly-fed motor can be used for design of a modulation mode wound rotor brushless doubly-fed motor and can also be used for design of a differential modulation mode wound rotor brushless doubly-fed motor, and the motors have high fundamental wave winding coefficients and low harmonic content in the two modes.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a brushless double-fed motor with a wound rotor designed by utilizing the equivalent transformation of the conduction current in a rotor slot. Background technique [0002] Brushless doubly-fed motors are mainly used in the field of variable speed and constant frequency. Because of the cancellation of slip rings and brushes, their reliability is high. There are two sets of pole pairs on the stator of the brushless doubly-fed motor, respectively p p and p c The windings are called power windings and control windings respectively, where: the power windings are connected to the power grid, while the control windings are connected to the variable frequency power supply. The power transmitted by the control winding is much smaller than the power transmitted by the entire motor, so the brushless doubly-fed motor can use a small-capacity frequency converter to achieve large...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/12H02K3/28
CPCH02K3/12H02K3/28
Inventor 潘卫东陈曦
Owner 潘卫东
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com