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

Rotor assembly and consequent pole motor

A technology of alternating poles and components, applied in the direction of electric components, magnetic circuit rotating parts, synchronous machines, etc., can solve the problems of unable to adjust the magnetic force lines, large motor torque fluctuations, and disordered distribution of permanent magnet poles, so as to reduce the rotation speed. Moment fluctuation, improved reliability, and reduced magnetic saturation

Pending Publication Date: 2020-04-10
GREE ELECTRIC APPLIANCES INC
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot adjust the magnetic force lines on the alternating poles. Due to the lack of magnetomotive force source, that is, the constraint of permanent magnets, the distribution of the magnetic force lines on the alternating poles is more disordered than that of the permanent magnetic poles, and the magnetic density on the permanent magnetic poles is already seriously saturated. After the air slot is installed, some narrow areas will be easily saturated, resulting in large torque fluctuations of the motor and reduced operational reliability

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
  • Rotor assembly and consequent pole motor
  • Rotor assembly and consequent pole motor
  • Rotor assembly and consequent pole motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] see in conjunction Figure 1 to Figure 7 As shown, according to the embodiment of the present application, the rotor assembly includes a rotor core 1, the rotor core 1 includes permanent magnet poles and alternate poles arranged alternately along the circumferential direction, the permanent magnet poles include installation slots 2, and permanent magnet poles are installed in the installation slots 2. For the magnet 3 , the circumferential ends of the mounting groove 2 are provided with first air grooves 4 extending away from the centerline of the permanent magnet poles, and the radially outer peripheral side of the mounting groove 2 is not provided with air grooves.

[0034] The rotor assembly of the present application only arranges the air slots at the alternate poles, and does not set the air slots on the radially outer peripheral side of the installation slot 2 where the permanent magnets 3 are installed, so that the adverse effects of the air slots on the structure...

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 provides a rotor assembly and a consequent pole motor. The rotor assembly comprises a rotor core (1), the rotor core (1) comprises permanent magnet poles and consequent poles, the permanent magnet poles and the consequent poles are alternately arranged along the circumferential direction, the permanent magnet poles comprise mounting grooves (2), permanent magnets (3) are mounted in the mounting grooves (2), first air grooves (4) extending along the direction far away from the center lines of the permanent magnet poles are formed in two circumferential ends of the mounting grooves(2), and air grooves are not formed in the radial peripheral sides of the mounting grooves (2). According to the rotor assembly, the torque ripple of the motor in the operation process can be reduced, and the reliability of the motor is improved.

Description

technical field [0001] The present application relates to the technical field of motors, in particular to a rotor assembly and an alternating pole motor. Background technique [0002] The number of permanent magnets used by the alternating pole permanent magnet synchronous motor is only half of that of the traditional permanent magnet synchronous motor. Therefore, it can fully utilize the permanent magnets, which can significantly reduce the amount of permanent magnets used, thereby reducing the cost of the motor. [0003] However, its special magnetic circuit structure also brings many problems, including the decrease of output torque caused by the reduction in the use of permanent magnets, and the problem of increased torque fluctuation caused by the asymmetry of adjacent magnetic pole structures, which limits the further promotion of alternating pole motors. application. [0004] A method for suppressing torque ripple is proposed in the prior art. Air grooves are arrange...

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): H02K1/27H02K21/02H02K29/03
CPCH02K1/2773H02K1/2786H02K21/028H02K29/03H02K2213/03H02K1/2746
Inventor 桂鹏千李权锋丁佳婷肖勇史进飞
Owner GREE ELECTRIC APPLIANCES INC
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