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Rotor structure, permanent magnet assisted synchronous reluctance motor and electric vehicle

A technology of rotor structure and permanent magnets, applied in electric vehicles, motors, electric components, etc., can solve problems such as low motor efficiency

Active Publication Date: 2020-10-23
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a rotor structure, permanent magnet assisted synchronous reluctance motor and electric vehicle, to solve the problem of low motor efficiency in the prior art

Method used

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  • Rotor structure, permanent magnet assisted synchronous reluctance motor and electric vehicle
  • Rotor structure, permanent magnet assisted synchronous reluctance motor and electric vehicle
  • Rotor structure, permanent magnet assisted synchronous reluctance motor and electric vehicle

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Embodiment Construction

[0044] 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.

[0045] to combine Figure 1 to Figure 12 As shown, according to an embodiment of the present invention, a rotor structure is provided.

[0046] Specifically, the rotor structure includes a rotor body and outer permanent magnets. The rotor body 10 is provided with a set of magnetic steel slots, the set of magnetic steel slots includes an outer layer of magnetic steel slots 11, the outer layer of magnetic steel slots 11 includes a plurality of magnetic steel slot sections, and there are at least two magnetic steel slot sections in the plurality of magnetic steel slot sections The slot segments are oppositely arranged in the radial direction of the rotor body 10 and located on both sides of the st...

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Abstract

The invention provides a rotor structure, a permanent magnet assisted synchronous reluctance motor and an electric vehicle. The rotor structure includes a rotor body and an outer permanent magnet. The rotor body is provided with a set of magnetic steel slots, the set of magnetic steel slots includes an outer layer of magnetic steel slots, the outer layer of magnetic steel slots includes a plurality of magnetic steel slot sections, at least two of the plurality of magnetic steel slot sections are along the The radial direction of the rotor body is oppositely arranged and located on both sides of the direct axis of the rotor body. The outer permanent magnet is arranged in the magnetic steel slot section, wherein, the length of the outer permanent magnet positioned in the two oppositely arranged magnetic steel slot sections is L, and the maximum distance between the two oppositely arranged magnetic steel slot sections is C, where 0.8×C≤L. Through the arrangement of the outer magnetic steel grooves of the magnetic steel groove group on the rotor body, more permanent magnets are placed in the unit rotor volume, which generates a larger permanent magnet torque, improves the q-axis inductance of the motor, and increases the efficiency of the motor , reduce the torque ripple of the motor, reduce the vibration and noise of the motor, and improve the demagnetization ability of the motor.

Description

technical field [0001] The invention relates to the technical field of motor equipment, in particular to a rotor structure, a permanent magnet assisted synchronous reluctance motor and an electric vehicle. Background technique [0002] Electric vehicles have the characteristics of energy saving and environmental protection, and have been developed rapidly. In order to achieve the functions of high power density and high efficiency of the existing electric vehicle drive motors, more and more motors use high-performance rare earth permanent magnet motors. Rare-earth permanent magnet motors can achieve high efficiency and high power density, mainly relying on high-performance rare-earth permanent magnets. Currently, NdFeB rare-earth permanent magnets are the most widely used. However, rare earth is a non-renewable resource, the price is relatively expensive, and the price of rare earth fluctuates greatly, resulting in higher production costs of electric vehicle drive motors, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K29/03
CPCH02K1/2766H02K29/03H02K2213/03H02K1/2773Y02T10/64B60K1/00
Inventor 黄辉胡余生陈彬肖勇童童卢素华
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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