Power drive module of electric actuator

Abstract

The invention discloses a power drive module of an electric actuator. The power drive module comprises a chip U1, wherein a pin 22 of the chip U1 is connected with a pin 1 of an element PH2 and a pin 2 of an element PH1; a pin 2 of the element PH2 and a pin 1 of the element PH1 are connected with a resistor R7; the other end of the resistor R7 is connected with a pin 21 of the chip U1; a pin 3 of the element PH1 is connected with a resistor R3; the other end of the resistor R3 is connected with a bidirectional silicon-controlled switch TZ1, a capacitor C2, a resistor Z2, a pin 2 of an element J1 and a pin 2 of an element J2; a second end of the bidirectional silicon-controlled switch TZ1 is connected with a capacitor C3, a resistor R5 and a pin 4 of the element PH1; and the other end of the capacitor C3 is connected with the other end of a resistor R5, a third end of a bidirectional silicon-controlled switch KZ1, a capacitor C4, a bidirectional silicon-controlled switch KZ2, a resistor R6, a resistor R2, a resistor R1, the other end of the resistor Z2, a resistor Z1 and a pin 2 of an element J3. According to the power drive module, the circuit structure is simple, the cost is relatively low, the operating performance is good, and the interference of a power drive circuit is low.

Description

technical field [0001] The invention relates to the technical field of electric actuators, in particular to a power drive module of the electric actuator. Background technique [0002] The actuator is an important part of the process control system. People often compare the actuator to the "hands and feet" of the automation of the production process. The actuator is composed of two parts: the actuator and the adjustment mechanism. The actuator is used to drive the valve to Fully open or fully closed position. The actuator used to control the valve can precisely make the valve go to any position. Although most actuators are used to switch valves, the design of today's actuators goes far beyond simple switching functions, they include position sensing devices, torque sensing devices, electrode protection devices, logic control devices, digital communication modules And PID control module, etc., and these devices are all installed in a compact shell, the power drive module ci...

AI Technical Summary

Problems solved by technology

Although most actuators are used to switch valves, the design of today's actuators goes far beyond simple switching functions, they include position sensing devices, torque sensing devices, electrode protection devices, logic control devices, digital communication modules And PID control module, etc., and these devices are all installed in a compact shell, the power drive module circuit of the existing electric actuator is relatively complicated, and it is easy to be interfered by external strong electricity, so that the power drive is greatly affected

Images