Device and method for resisting rotor disturbance of permanent-magnet synchronous motor in zero-speed or extremely-low-speed state

Abstract

The invention discloses a device and a method for resisting rotor disturbance of a permanent-magnet synchronous motor in a zero-speed or extremely-low-speed state. The method comprises the following steps: a pulse blocking logic unit judges whether the permanent-magnet synchronous motor is in a state close to the zero-speed or extremely-low-speed state according to a practical speed calculated by a speed detecting unit so as to decide whether the resistance to rotor disturbance is required according to a target rotational speed / rotary moment command, if yes, the pulse blocking logic unit gives out a pulse blocking signal to a pulse duration driving unit so as to generate a result that an output signal of a space vector control unit can not drive an inversion power unit through the pulse duration driving unit, further the inversion power unit does not generate inversion voltage and the permanent-magnet synchronous motor is in a no-voltage-input state, so that rotor disturbance of the permanent-magnet synchronous motor in the zero-speed and extremely-low-speed state is certainly resisted. The device and the method provided by the invention achieve the technical purpose of rotor disturbance resistance of the permanent-magnet synchronous motor in the zero-speed or extremely-low-speed state.

Description

technical field [0001] The invention relates to a motor control device and a method thereof, in particular to a device and method for anti-rotor disturbance applied to a vector control device of a permanent magnet synchronous motor at zero speed or extremely low speed. Background technique [0002] With the rapid development of permanent magnet materials, power electronics technology and motor control theory, permanent magnet synchronous motors have been increasingly widely used in CNC machine tools, industrial robots, aerospace, electric vehicles and other fields due to their superior performance and firmness. . The basic structure and rotation principle of permanent magnet synchronous motor are as follows: [0003] Synchronous motors have two structural forms: rotating magnetic pole type and rotating armature type. Large and medium-capacity synchronous motors mostly use rotating magnetic pole type. According to the shape of the rotor, the rotating magnetic pole type can ...

AI Technical Summary

Problems solved by technology

[0015] The object of the present invention is to provide an anti-rotor disturbance device and method for a permanent magnet synchronous motor at zero or extremely low speed, so as to solve the problem of permanent magnet synchronous The technical problem of rotor disturbance when the motor is at zero speed or very low speed

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