Bi-directional electromagnet driving circuit and application method of dual-duty ratio pulse width modulation signal

Abstract

The invention relates to a low-power high-speed bidirectional electromagnet drive circuit with dual duty ratio pulse width modulation signals and a method for using the same, which includes a triangular wave generating circuit, a first dual voltage signal generating circuit, a second dual voltage signal generating circuit, PWM signal modulation circuit, power amplifier stage circuit. Utilizing the driving circuit of the present invention, when the electromagnet is working in the pull-in stage, the high voltage is output under the 100% duty ratio pulse width modulation signal; when the electromagnet moves and enters the pull-in holding stage, the high voltage is maintained at a low duty cycle Low power consumption; when the electromagnet is working in the reset stage, the high voltage is output as a pulse width modulation signal with a 100% duty cycle; when the electromagnet is reset and enters the reset hold stage, the high voltage is maintained at a low duty cycle Consumption hold. This drive circuit adopts high current to open and low current to maintain, which shortens the pull-in and reset time of the bidirectional electromagnet, reduces the power consumption of pull-in and reset hold, and improves the dynamic and steady-state performance of the bidirectional electromagnet.

Description

technical field [0001] The invention belongs to the field of electronic technology, and specifically refers to a low-power-consumption high-speed bidirectional electromagnet drive circuit with a dual-duty ratio pulse width modulation signal and a method for using the same. Background technique [0002] High-speed electromagnets have been widely used in many high-end fields such as aerospace, diesel engine fuel injection systems, wheel anti-lock braking systems, automobile shock absorbers, national defense and military industry, deep-sea exploration, etc., and their dynamic and steady-state performance directly affects the performance of the entire system. control performance. The driving circuit can improve the dynamic and steady-state performance of the electromagnet to a large extent, but the more commonly used method is to use dual power supplies (one high voltage, the other low voltage) to automatically switch the circuit, and use high voltage during the electromagnet op...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the driving circuit of the electromagnet needs to switch between multiple different power supplies or power amplifier circuits, which requires high real-time switching and complicated circuit design.

Images