Stepless adjustable great current generating circuit for driving electromagnetic performer

Abstract

The invention discloses a stepless adjustable heavy current generation circuit used for driving an electromagnetic actuator, which comprises a processor, a digital-analog converter, a voltage comparator, an isolated-form power tube driver, an isolated-form operational amplifier, a current sample module and an insulated gate bipolar transistor. The processor is connected with the digital-analog converter; the digital-analog converter is connected with the voltage comparator; the voltage comparator is connected with the isolated-form power tube driver; the isolated-form power tube driver is connected with the insulated gate bipolar transistor; the isolated operational amplifier is connected with the voltage comparator; the current sample module is connected with the isolated operational amplifier, and is connected with the positive input end of the electromagnetic actuator; the collector input end of the isolated gate bipolar transistor is connected with the reverse input end of the electromagnetic actuator. The invention has the advantages of high circuit reliability to prevent industrial accident, convenient set of the driving current value and accurate and reliable stepless adjustment.

Description

A Stepless Adjustable Large Current Generating Circuit for Driving Electromagnetic Actuators technical field The invention relates to a 0-5A stepless adjustable large current generating circuit with strong anti-interference ability and good reliability, which is especially suitable for driving electromagnetic actuators. Background technique Electromagnetic actuators are widely used in industrial production because of their simple structure, small size, convenient control, fast response, and good stability and precision. The construction of the electromagnetic actuator is an electromechanical component with a closed magnetic circuit. When the excitation coil inside the actuator passes current, a magnetic flux will be generated in the closed-loop magnetic circuit (conical stator core→housing stator core→air gap→moving armature→working air gap→conical stator core) and electromagnetic flux will be generated. force. Due to the action of the electromagnetic force, the return ...

AI Technical Summary

Problems solved by technology

However, in this case, if the embedded processor has a program "runaway" fault, the state of the MOS tube will be turned on but not off, or off but not on, so that the current suddenly drops to 0 or increases. Large to the full range, the electromagnetic actuator suddenly shuts down or rotates to the maximum angle, which can easily cause production accidents

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