Load disturbance compensation device and method of permanent magnet synchronous motor

Abstract

The invention discloses a load disturbance compensation device of a permanent magnet synchronous motor. The load disturbance compensation device comprises a load moment recognition sliding-mode observer and the like. The permanent magnet synchronous motor is connected with a PARK conversion module, a PARK inverse transformation module, a velocity calculation module and a CLARK conversion module respectively. The velocity calculation module is both connected with a first summator and the load moment recognition sliding-mode observer. The first summator and a second summator are both connected with a speed ring PI regulator. The CLARK conversion module is connected with the PARK inverse transformation module. The PARK inverse transformation module is connected with the load moment recognition sliding-mode observer, a fourth summator and a third summator. The load moment recognition sliding-mode observer is connected with a load moment recognition value feed-forward compensation factor unit. The load moment recognition value feed-forward compensation factor unit is connected with the second summator. The second summator is connected with the fourth summator. The fourth summator is connected with an electric current loop PI regulator. The third summator is connected with the electric current loop PI regulator. The electric current loop PI regulator is connected with the PARK conversion module. The PARK conversion module is connected with a space vector modulation module, the space vector modulation module is connected with a rectification/three-phase inverter module, and the rectification/three-phase inverter module controls the permanent magnet synchronous motor to operate.

Description

technical field [0001] The invention relates to a load disturbance compensation device, in particular to a load disturbance compensation device and method for a permanent magnet synchronous motor. Background technique [0002] In permanent magnet synchronous motor engineering servo systems used in crank servo presses, injection molding machines, bending machines, etc., disturbance is the main reason for its performance degradation, and load disturbance is particularly prominent. In order to improve the servo performance of the system, the load disturbance must be suppressed. Only when the disturbance is fully compensated can the system obtain superior servo performance. A disturbance observer designed a motor controller device that can suppress load disturbances, but the disturbance observer used in patent document 1 is not the content protected by the patent itself, and the disturbance observer described in patent document 2 is implemented more complicated. Contents of t...

AI Technical Summary

Problems solved by technology

In order to improve the servo performance of the system, the load disturbance must be suppressed. Only when the disturbance is fully compensated can the system obtain superior servo performance. A disturbance observer designed a motor con...

Images