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Motor rotor and built-in type permanent-magnet motor

A technology of permanent magnet motors and electric motors, applied in the field of motors, can solve the problems of low efficiency and large amount of permanent magnets used in motors, and achieve the effect of improving efficiency

Active Publication Date: 2013-07-24
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention aims to provide a motor rotor and a built-in permanent magnet motor to solve the problems of large usage of motor permanent magnets and low efficiency in the prior art

Method used

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  • Motor rotor and built-in type permanent-magnet motor
  • Motor rotor and built-in type permanent-magnet motor
  • Motor rotor and built-in type permanent-magnet motor

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Embodiment Construction

[0035] 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.

[0036] by image 3 The quadrupole rotor of the first embodiment of the present invention shown in , each pole contains two layers of permanent magnet slots, and the motor rotor with inner permanent magnet slots containing three magnetic bridges is taken as an example to illustrate the present invention:

[0037] The motor rotor 1 of the present invention includes an iron core 2 made of silicon steel sheets. There are multiple groups of permanent magnet slots on the iron core 2, and each group of permanent magnet slots constitutes a pole of the motor. Each set of permanent magnet slots includes two layers of permanent magnet slots: an outer layer of permanent magnet slots 3a away from the cente...

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Abstract

The invention provides a motor rotor and a built-in type permanent-magnet motor. The motor rotor comprises a core (2), wherein multiple groups of permanent-magnet magnetic poles are arranged on the core (2) in the circumferential direction; each group permanent magnet magnetic pole comprises multiple layers of permanent-magnet grooves; and in each group of permanent-magnet magnetic pole, permanent magnets (4) are embedded in partial permanent magnet grooves, and magnetic bridges capable of conducting flux are arranged in other permanent-magnet grooves. According to the technical scheme provided by the invention, the magnetic bridges capable of conducting flux are arranged in the permanent-magnet grooves in which the permanent magnets (4) are not arranged, so that the synthesized torque ofpermanent-magnet torque and reluctance torque of a permanent-magnetic auxiliary synchronous reluctance motor achieve higher level under the condition that less rare earth permanent magnets are used, and the motor efficiency is further improved.

Description

technical field [0001] The invention relates to the field of motors, in particular to a motor rotor and a built-in permanent magnet motor. Background technique [0002] In the built-in permanent magnet synchronous motor (IPM), because the permanent magnet is buried in the rotor core, the firmness of the rotor is enhanced and the eddy current loss inside the permanent magnet is reduced. There is a difference in inductance between the d-axis and q-axis directions of the permanent magnet built-in permanent magnet synchronous motor. In addition to the permanent magnet torque of the motor, the reluctance torque of the motor can be used to improve the efficiency of the motor. Therefore, its application is becoming more and more extensive. The electromagnetic torque of the built-in permanent magnet synchronous motor is composed of permanent magnet torque and reluctance torque. The electromagnetic torque formula is as follows: [0003] T=p(L d -L q )i d i q +pψ PM i q [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27
CPCH02K1/246H02K1/2766
Inventor 肖勇
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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