Motor control method, motor control device, motor system and storage medium

Abstract

The invention provides a motor control method, a motor control device, a motor system and a storage medium. The motor control method comprises the steps: calculating an initial quadrature-axis current instruction value according to a motor rotating speed instruction value and a motor rotating speed feedback value, determining a quadrature-axis current instruction value of a motor according to bus voltage, a voltage threshold value, the motor rotating speed feedback value and the initial quadrature-axis current instruction value, and / or calculating an initial direct-axis current instruction value according to the square of the bus voltage and the square of the motor voltage, and determining an instruction value of the direct-axis current of the motor according to the running state of the motor and the initial direct-axis current instruction value; and controlling the operation of the motor according to the instruction value of the quadrature-axis current and / or the instruction value of the direct-axis current. Through the technical scheme of the invention, the motor can normally operate and switch in acceleration, steady state, deceleration and other states, and the robustness of the system can be improved while a controller is protected.

Description

technical field [0001] The present invention relates to the technical field of motors, in particular to a motor control method, a motor control device, a motor system and a computer-readable storage medium. Background technique [0002] For the general motor and its control system, including power supply, controller, motor and other parts, the power supply may be powered by grid AC or battery, and the AC power of the power supply may be rectified into DC, or the DC power of the power supply may be directly obtained, and the DC power of the controller may be The DC bus capacitor is connected in parallel on the bus side, and then converted into the AC voltage required by the motor through the inverter bridge. [0003] During the whole motor starting and running process, it includes acceleration state, steady state and deceleration state, etc. In the acceleration and steady state, the controller absorbs energy from the power supply side and transfers the energy to the motor. It...

AI Technical Summary

Problems solved by technology

In order to cope with energy recoil, a braking unit can be added to the controller, or other power motors or power devices can be added to the power system to absorb energy, but the added equipment will increase the size and cost of the entire system, and will cause heat dissipation , installation and other issues

[0004] Especially when the motor is running at high speed, when the motor switches from acceleration or steady state to deceleration state, if there is no additional braking device, it is likely that the bus voltage of the controller will be overvoltage due to energy recoil; When the acceleration or steady state is reached, it is very likely that the current required by the field weakening is not accurate enough to cause a sudden change in the motor current response.

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