Motor control method and device, electric vehicle and storage medium

A technology for motor control and electric vehicles, applied in the direction of AC motor control, control system, electrical components, etc., can solve the problems of low system efficiency and low controller efficiency.

Inactive Publication Date: 2020-06-16
CHONGQING JINKANG POWER NEW ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the low-speed section of this range, the efficiency of the controller is relatively low, making the overall system efficiency relatively low

Method used

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  • Motor control method and device, electric vehicle and storage medium
  • Motor control method and device, electric vehicle and storage medium
  • Motor control method and device, electric vehicle and storage medium

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Embodiment Construction

[0051] In order to make the purpose, technical solution and advantages of the present application clearer, the present application 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 application, and are not intended to limit the present application.

[0052] The motor control method provided by this application can be applied to such as figure 1 shown in the application environment. Wherein, the rotation speed sensor 12 is used to collect the rotation speed value of the motor, and transmit the collected current rotation speed value to the dynamic frequency conversion device 14 . The carrier frequency calculation module 142 of the dynamic frequency conversion device 14 can use the preset carrier frequency calculation model to calculate the triangular carrier frequency value (hereinafter referred to as the target carrier...

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Abstract

The invention relates to a motor control method and device, computer equipment and a storage medium. The method comprises the steps: obtaining a current rotating speed value of a motor; determining atarget carrier frequency value of the motor according to the current rotating speed value and a preset carrier frequency calculation model, wherein the carrier frequency calculation model is determined according to multiple sets of given rotating speed values and carrier frequency calibration values of the motor, the carrier frequency calibration values being determined according to system efficiency values of the corresponding given rotating speed values at different carrier frequency values, the system efficiency values being the total efficiency values of the motor and a controller of the motor; and adjusting the carrier signal input into the motor according to the target carrier frequency value. By adopting the method, the system efficiency can be improved globally.

Description

technical field [0001] The present application relates to the technical field of automobiles, in particular to a motor control method and device, an electric vehicle and a storage medium. Background technique [0002] The double closed-loop vector control of the AC motor can realize the precise control of the motor speed and torque. The DC current enters the inverter and is modulated into a three-phase AC current and enters the AC motor. The position sensor collects the rotor position information, and the current sensor collects the three-phase AC current information. After Clark and park transformation, the current i can be obtained d and i q The actual value is fed back to the current controller to complete the current closed loop. The difference between the target speed and the actual speed is input into the speed loop to generate the target torque, and the target current i obtained by looking up the table according to the target torque and the current speed d and i q...

Claims

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Application Information

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IPC IPC(8): H02P27/04H02P23/00
CPCH02P23/00H02P27/04
Inventor 郑易吴霏秦鑫孙滔
Owner CHONGQING JINKANG POWER NEW ENERGY CO LTD
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