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Motor rotor electrical angle detection circuit for electric vehicles

A technology for electric vehicles and motor rotors, applied in the direction of a single motor speed/torque control, electronic commutator, etc., can solve problems such as the overall performance decline of the motor, and achieve the effect of improving operating efficiency

Active Publication Date: 2017-05-10
广东高标智能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a motor driving method for an electric vehicle, which aims to solve the problem of the overall performance degradation of the motor caused by incorrect commutation in the existing technical solutions

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  • Motor rotor electrical angle detection circuit for electric vehicles
  • Motor rotor electrical angle detection circuit for electric vehicles
  • Motor rotor electrical angle detection circuit for electric vehicles

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] Before explaining the technical solution of the present invention, briefly explain the principle of the motor of the electric vehicle. The characteristics of the vector control will be described below by taking the three-phase brushless DC motor as an example: one period of the change of the Hall position sensor of the motor is defined as 1 For example, the output signal of the Hall position sensor is as follows: 6->4->5->1->3->2->6->4->5->1->3->2->6 , we define a total of 6 states of the Hall position signal from 5 to 4 as 1 electrical cycle, and 1 electrical cycle is 360 degrees electrical...

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Abstract

The invention is suitable for the field of electric means of transportation, and provides a motor precise driving method and a detection circuit for the electric means of transportation. The method comprises the steps: detecting the zero crossing time of phase current of any phase in a motor of the electric means of transportation, and calculating the time difference value between the zero crossing time of the phase current of any phase and the phase change time of a corresponding Hall position sensor of any phase; and converting the time difference value into an electrical angle difference value, and calculating and adjusting the correct electrical angle value at the phase change time according to the electrical angle difference value. The technical scheme provided by the invention has the advantages that the motor is enabled to be operated at the optimal state, and the operating efficiency of the motor is improved.

Description

technical field [0001] The invention belongs to the field of electric vehicles, and in particular relates to a motor driving technology of the electric vehicles. Background technique [0002] With the increasing popularity of electric vehicles, there are more and more manufacturers producing motors. Due to the different technical standards and production processes of various motor manufacturers, the differences in motors on the market are relatively large, and the controller cannot play a role when matching different motors. The best performance of the motor, even if it does not work properly. At present, major controller manufacturers are studying the compatibility of controllers with many motors. [0003] At present, electric vehicles on the market use brushless DC motors to provide driving force. Due to cost factors, almost all brushless DC motors currently use Hall position sensors. The characteristics determine that the Hall position sensor cannot accurately reflect t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/08H02P6/16
Inventor 陈清付柏松温瑭玮
Owner 广东高标智能科技股份有限公司