Quasi-sensorless position servo controlling device for permanent magnet synchronous motor and method thereof

Abstract

The invention discloses a quasi-sensorless position servo controlling device for a permanent magnet synchronous motor and a method thereof. The quasi-sensorless position servo controlling device comprises a permanent magnet synchronous motor which is provided with a HALL sensor, etc. The HALL sensor is connected with a quasi-sensorless controlling module. The quasi-sensorless controlling module is connected with a fifth subtractor, a position / speed integrated controller, a third substractor, a fourth substractor, a PI regulator and an IPark conversion module respectively. The fifth substractor is connected with the position / speed integrated controller. The position / speed integrated controller is connected with the third substractor. The PI regulator is connected with the third substractor, the fourth substractor and the IPark conversion module respectively. The IPark conversion module is connected with a space vector modulation module. The space vector modulation module is connected with a three-phase inverter. The three-phase inverter is connected with the permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to the mechatronics technology of textile machinery, in particular to a quasi-sensorless position servo control device and method of a permanent magnet synchronous motor suitable for point-to-point movement of textile machinery. Background technique [0002] With the constant demands of energy saving, high efficiency, high speed and high precision in the textile industry, the permanent magnet AC servo system has high power factor, high efficiency, high dynamic response, high reliability, high overload capacity and high The application of output torque and other advantages in textile machinery has become a trend, and it is one of the core technologies for mass application in the future, and the market prospect is very broad. However, there are some special working conditions in some textile machines: For example, when the warp knitting machine is running, it needs to drive the bar to complete the "stop→movement→stop" yarn laying mo...

AI Technical Summary

Problems solved by technology

For this reason, the servo system used in some point movement occasions needs sensorless control technology on the basis of improving position response performance, such as patent document 1 (patent number 200910090386.9) and patent document 2 (patent number 200510108039.6) proposed An AC servo driver that does not need a current sensor can realize the closed-loop vector control of the speed of the hidden pole permanent magnet synchronous motor without a current sensor, which reduces the hardware cost of the speed control system, but patent documents 1 and 2 retain the position detection unit, The total control cost is still high, and it is not suitable for some textile applications with high cost requirements

Images