Motor rotor and electric motor having it

A technology of motor rotor and rotor core, which is applied to synchronous motors, electrical components, and electromechanical devices with static armatures and rotating magnets, and can solve problems such as large torque ripple and high noise.

Active Publication Date: 2015-05-06
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a motor rotor and a motor with it, so ...

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  • Motor rotor and electric motor having it
  • Motor rotor and electric motor having it
  • Motor rotor and electric motor having it

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Embodiment Construction

[0023] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] Such as Figures 1 to 6 As shown, according to the embodiment of the present invention, the motor rotor includes a rotor core 10, and the rotor core 10 is provided with a magnetic pole structure. The magnetic pole structure includes a multi-layer magnetic steel slot and a plurality of permanent magnet structures. There is a magnetic isolation bridge 111 at the end; the permanent magnetic structures are arranged in the magnetic steel grooves of each layer correspondingly, and the permanent magnetic structures in the magnetic steel grooves include a plurality of magnetic steels, and the multiple magnetic steels are divided into middle magnetic steel L11, L21 and an even number of side mag...

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Abstract

The invention provides a motor rotor and an electric motor having the electric motor. The motor rotor includes a rotor core, and a magnetic pole structure is arranged on the rotor core; the magnetic pole structure includes a multi-layer magnetic steel groove, wherein both ends of every layer of the magnetic steel groove are provided with magnetic isolating bridges; permanent magnetic structures, each of which is correspondingly arranged in every layer of the magnetic steel groove, and at least one permanent magnetic structure includes a plurality of magnetic steels, and a plurality of magnetic steels include a middle magnetic steel and even number of side magnetic steels; the center line of the middle magnetic steel is overlapped with the center line of the magnetic pole, the side magnetic steels are symmetrically arranged at both sides of the middle magnetic steel; a retained magnetic bridge is arranged between adjacent two magnetic steels, and the center line of every layer of the retained magnetic bridge is not located on the same one line. By adopting the motor rotor, the motor noise can be reduced.

Description

technical field [0001] The invention relates to the field of electric motor equipment, in particular to a motor rotor and a motor having the same. Background technique [0002] The permanent magnet synchronous reluctance motor has the advantages of high efficiency and low cost. In the actual application process, there are usually magnetic steel slots in the rotor, and permanent magnets are embedded in the magnetic steel slots, so as to make full use of the reluctance torque. The output torque of the motor is composed of permanent magnet torque and reluctance torque. Due to the structural characteristics of the motor itself, the difference in inductance of the DQ axis fluctuates greatly, resulting in large fluctuations in the reluctance torque, which causes greater vibration of the motor. By changing the size and position of the magnets in the rotor, in many cases, it is not effective to reduce the torque ripple or reduce the performance of the motor. Contents of the invent...

Claims

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Application Information

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IPC IPC(8): H02K1/27
CPCH02K1/274H02K21/14H02K29/03
Inventor 卢素华陈彬史进飞贾武豪
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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