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Control method and device of permanent magnet motor, power system and electric vehicle

A technology of permanent magnet motor and control method, which is applied in the field of control method, device, power system and electric vehicle of permanent magnet motor, which can solve the problems of large noise, achieve the effects of reducing noise, eliminating main vibration, and reducing control difficulty

Active Publication Date: 2020-07-24
JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the noise is too large in the process of using the motor to heat the power battery

Method used

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  • Control method and device of permanent magnet motor, power system and electric vehicle
  • Control method and device of permanent magnet motor, power system and electric vehicle
  • Control method and device of permanent magnet motor, power system and electric vehicle

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Embodiment Construction

[0062] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings in this application. Obviously, the described embodiments are part of the embodiments of this application , but not all examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection zone of this application.

[0063] An electric vehicle refers to a vehicle powered by a power battery. Such as figure 1As shown, a power system 100 of an electric vehicle includes a power battery 10 , an inverter 20 , a motor 30 and a motor controller (Motor Controller Unit, MCU for short) 40 . The positive and negative poles of the power battery 10 are connected to the DC side of the inverter 20 , and the AC side of the inverter 20 is connect...

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Abstract

The invention provides a control method and device of a permanent magnet motor, a power system and an electric vehicle. The energization frequency of the permanent magnet motor is set by acquiring system parameters such as the resonance bandwidth of the permanent magnet motor and the inherent frequency of a stator of the permanent magnet motor, and when a power battery meets a self-heating condition, alternating current with the energization frequency is used for supplying power to the permanent magnet motor, so that noise generated by the motor in the self-heating process of the power batteryis reduced.

Description

technical field [0001] The present application relates to the field of electric vehicles, and more specifically, to a control method, device, power system and electric vehicle for a permanent magnet motor. Background technique [0002] An electric vehicle refers to a vehicle powered by a power battery. Due to the limitation of power battery materials, it can stably exert the best performance at the rated ambient temperature. Therefore, when using electric vehicles in areas with low ambient temperature, it is necessary to heat the power battery to the rated ambient temperature. [0003] The existing power battery heating methods can be divided into indirect heating and direct heating. Indirect heating refers to placing a heat source outside the power battery for heating. Direct heating refers to heating the power battery inside the power battery. Among them, the common direct heating method is heating by motor. Specifically: the power battery is connected to the motor thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/00B60L15/20B60L58/27B60L53/24B60L58/18
CPCB60L15/007B60L15/20B60L58/27B60L53/24B60L58/18B60L2240/421B60L2240/427B60L2240/429Y02T10/70Y02T10/7072Y02T90/14Y02T10/64Y02T10/72H02P29/68H01M2220/20H01M10/425H01M2010/4271H01M10/486B60L2270/142B60L2270/145B60L2240/545B60L2260/22B60L2240/42Y02E60/10B60Y2200/91B60L58/24B60L50/51H02P2207/05
Inventor 黄孝键左希阳但志敏李宝
Owner JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED