A motor model predictive current control method and device, electronic equipment and medium

Abstract

One or more embodiments of this specification provide a motor model predictive current control method and device, electronic equipment, and media. The method obtains the sector where the reference voltage vector is located by means of fast vector selection, and uses the principle of proximity from non- The optimal voltage vector is selected from the zero voltage vector, and a dead zone is configured for each inverter bridge arm, and the dead zone voltage vector is obtained according to the flow direction of the three-phase current of the motor, which solves the zero vector equivalent of the dead zone voltage vector and the waiting time The impact of the high-amplitude common-mode voltage generated by the zero vector in the selected vector on the life of the motor is optimized, and the duration of the dead-zone voltage vector is used as a variable to optimize the control effect.

Description

technical field [0001] One or more embodiments of this specification relate to the technical field, and in particular to a motor model predictive current control method and device, electronic equipment and media. Background technique [0002] Among the control strategies of AC motor speed control system, the most mature one is vector control. In the vector control method, the outer loop controls the speed and the inner loop controls the current. First, the rotor position angle and the stator current measured by the Hall are collected through the encoder, and then the three-phase stationary coordinate system is transformed into a two-phase rotating coordinate system through coordinate transformation, and then the voltage space vector pulse width modulation (SVPWM) is used to ) technology acts on the inverter to control the motor. Vector control has a good steady-state effect, but the dynamic effect is average, and there are three PI regulators, which increases the difficult...

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Problems solved by technology

[0004] In view of this, the purpose of one or more embodiments of this specification is to propose a motor model predictive current control method and device, electronic equipment and media to solve the problem of the existence of the dead zone and the role of the zero vector among the candidate vectors. It will lead to the existence of high-amplitude common-mode voltage, which will affect the service life of the motor

This method selects the optimal voltage vector from non-zero voltage vectors according to the principle of proximity after obtaining the sector where the reference voltage vector is located by means of fast vector selection, and configures a dead zone for each inverter bridge arm, according to The dead-zone voltage vector is obtained from the flow direction of the three-phase current of the motor, which solves the influence of the high-amplitude common-mode voltage generated by the equivalent zero vector of the dead-zone voltage vector and the zero vector in the vector to be selected on the life of the motor, and the dead-zone voltage Vector duration is optimized as a variable for improved control

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