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Permanent magnet synchronous motor and its electric vehicle

A technology of permanent magnet synchronous motors and magnets, which is applied in the field of motors, can solve the problem that the load operating characteristics are not significantly improved, and achieve the effect of increasing the output torque

Active Publication Date: 2017-12-19
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing technology only optimizes the design for the characteristics of no-load operation.
For the drive motor, the proportion of no-load operation is small, and the existing optimization does not significantly improve the load operation characteristics

Method used

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  • Permanent magnet synchronous motor and its electric vehicle

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Embodiment Construction

[0021] 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.

[0022] combine figure 1 As shown, the permanent magnet synchronous motor of this embodiment includes a rotor 10 and a stator 20 sleeved on the outside of the rotor 10. The rotor 10 includes a rotor body 11 and a plurality of magnet parts 12 installed on the rotor body 11. The outer periphery of the rotor 10 A plurality of recessed parts 13 are provided on the surface to form a non-uniform air gap with the inner peripheral surface of the stator 20 , and each magnet part 12 has a center line extending in the radial direction of the rotor 10 .

[0023] When the permanent magnet synchronous motor is used as a motor, the minimum air gap of the non-uniform air gap is centered on the axis of the roto...

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Abstract

The invention provides a permanent-magnet synchronous motor and an electric automobile with the same. The permanent-magnet synchronous motor comprises a rotor and a stator arranged on the exterior of the rotor in a sleeving mode; the rotor comprises a rotor body and multiple magnets installed on the rotor body, the outer peripheral surface of the rotor is provided with multiple sunk portions to form non-homogeneous air gaps with the inner peripheral surface of the stator, and each magnet is provided with a center line extending in the radial direction of the rotor; when the permanent-magnet synchronous motor serves as an electromotor, the minimum air gap position of the non-homogeneous air gaps deviates from the center line by an A electrical degrees by taking an axis of the rotor as a center in the rotating direction of the rotor, wherein 30<A<60. On the condition of load running of the motor, the strongest position of a magnetic field corresponds to the minimum air gap position of the non-homogeneous air gaps or the position nearby the minimum air gap, and the output torque of the permanent-magnet synchronous motor on the load running condition is increased.

Description

technical field [0001] The invention relates to the field of motors, in particular to a permanent magnet synchronous motor and an electric vehicle equipped with it. Background technique [0002] The air gap of permanent magnet synchronous motor is divided into two types: uniform air gap and non-uniform air gap. The existing non-uniform air gaps are symmetrically distributed around the center of the magnetic pole, that is, the center of the magnetic pole corresponds to the minimum air gap of the non-uniform air gap, and the no-load air-gap flux density waveform, no-load induced potential waveform and no-load loss are optimized. [0003] However, the existing technology only optimizes the design for the characteristics of no-load operation. For the drive motor, the proportion of no-load operation is small, and the existing optimization does not significantly improve the load operation characteristics. Contents of the invention [0004] The main purpose of the present inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/14H02K1/27
CPCH02K1/272H02K21/14H02K2213/03Y02T10/64
Inventor 张健李玉军蒋荣勋王江涛
Owner BEIJING ELECTRIC VEHICLE