A Three-phase Intelligent Servo Controller

Abstract

The invention discloses a three-phase intelligent servo controller. The three-phase intelligent servo controller comprises a power supply processing circuit, a phase sequence detecting circuit, a commutating circuit, a three-phase motor driving and protecting circuit, a main control circuit, a peripheral input circuit, a peripheral output circuit and a man-machine interface circuit, wherein the power supply processing circuit converts a 380V power supply into three routes of low-voltage power supplies; through shaping and filtering, a direct current power supply is obtained; through voltage reduction, shaping and filtering, an orthogonal square wave is obtained; the main control circuit acquires the phase sequence of the orthogonal square wave, and sends high and low level signals to the commutating circuit; the commutating circuit controls the three-phase commutating circuit to work; the three-phase motor driving and protecting circuit controls a motor to work; the main control circuit acquires signals transmitted by the peripheral input circuit, processes the signals, and a control signal and a state signal of 4-20mA are output by the peripheral output circuit; and the man-machine interface circuit is connected with the main control circuit for setting and revising internal parameters.

Description

technical field [0001] The invention relates to the field of control technology, in particular to a three-phase intelligent servo controller for automatic control in industrial processes. Background technique [0002] In modern industrial automation process control, three-phase electric actuators are often used for control due to field wiring requirements. Traditionally, double AC contactors are used for forward and reverse control, which are bulky and inconvenient to install; when the contactor is on and off, it directly acts on the motor, which is prone to arcing and arc short-circuit faults; the action response time is long, and electric braking cannot be achieved. resulting in inaccurate positioning. Although the use of frequency converter can solve the above problems, but the price is more expensive. [0003] With the rapid development of industrial automation, the requirements for electric actuators used in process control are getting higher and higher. Actuators wi...

AI Technical Summary

Problems solved by technology

In China, contactors are mostly used to realize the control of three-phase electric actuators, but the volume is too large, and there is no electric braking, which leads to inaccurate positioning.

Similar foreign products use inverter technology, but the price is often several times that of domestic products

Images