A detection method of initial phase angle of linear motor

Abstract

The invention provides a method for detecting the initial phase angle of a linear motor, and the method comprises the steps: S1, enabling a rotor of the linear motor to carry out forwarding and reverse fine motion, and guaranteeing that the rotor of the linear motor is not located at two ends; S2, operating an initial phase angle detection algorithm. The beneficial effects of the invention are that the method not only can precisely detect the initial phase angle of the linear motor when the initial position of the linear motor is not at two sides, but also can effectively solve a problem of detection failure of the phase angle when the initial position of the linear motor is at two ends.

Description

technical field [0001] The invention relates to an initial phase angle detection method, in particular to an initial phase angle detection method of a linear motor. Background technique [0002] The permanent magnet synchronous linear motor directly converts electrical energy into linear motion, canceling all the traditional intermediate transmission links between the rotary motor and the workbench, and the feed system can directly drive the load, with high-speed and high-precision characteristics, so the linear motor It is becoming the main functional component of high-end CNC machine tools, and has broad application prospects in many applications such as high-speed and high-precision CNC systems, IC core making and packaging equipment, and photolithography machines. In order to obtain good dynamic speed regulation characteristics and improve the control effect, the linear motor adopts vector control technology. However, permanent magnet synchronous linear motors mostly us...

AI Technical Summary

Problems solved by technology

[0004] Although the literature has proposed a variety of methods to detect the initial phase angle of the permanent magnet synchronous linear motor, when the mover of the linear motor is at both ends, the motor may be subjected to resistance at both ends and cannot move slightly in a certain direction, and the detection method will not be correct. Applicable to the case where the mover of the linear motor is at both ends, the initial phase angle detection will fail

[0005] The defects of the existing methods for detecting the initial phase angle of permanent magnet synchronous linear motors are mainly due to the lack of consideration of the special conditions of the linear motor movers at both ends.

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