Double-voltage driving circuit of high-speed switch valve

Abstract

The invention discloses a double-voltage driving circuit of a high-speed switch valve. The double-voltage driving circuit is characterized in that a high-voltage control signal PWM1 is connected to the control end of a high-voltage control switch V1, the output end of a high-voltage voltage source U1 is connected with one end of the high-voltage control switch V1, the output end of a low-voltage voltage source U2 is connected with the other end of the high-voltage control switch V1 and the cathode end of a diode D2 through a diode D1, a driving control signal PWM2 is connected to the control end of a driving control switch V2, one end of the driving control switch V2 is grounded, the other end of the driving control switch V2 is connected with one end of a resistor RZ, the other end of theresistor RZ is connected with the cathode of a voltage-regulator tube DWZ, and the anode of the voltage-regulator tube DWZ is connected with the anode of the diode D2. According to the double-voltagedriving circuit of the high-speed switch valve, the structure is simple, the cost is low, the valve element pull-in and drop-out retardation time can be effectively shorten, and furthermore, a high-voltage power supply and a low-voltage power supply are used in a altering mode, so that heating of a coil is greatly reduced, and the service life of the high-speed switch valve is prolonged.

Description

technical field [0001] The invention relates to the technical field of high-speed switching valves, in particular to a dual-voltage drive circuit for high-speed switching valves. Background technique [0002] The high-speed on-off valve is a key component of the turbocharger system of gasoline passenger cars. Since the electromagnet of the high-speed on-off valve is subjected to electromagnetic attraction and the valve core is under the action of the spring force, the response process of the high-speed on-off valve will always lag behind the PWM signal. On, off. Increasing the driving voltage in the drive circuit of the high-speed switching valve can quickly realize the pull-in response of the high-speed switching valve. However, the increase in voltage will increase the temperature rise of the coil, which will reduce the service life of the valve core. [0003] At this stage, the high-speed switch valve drive circuit developed in my country mainly adopts single-voltage dri...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the existing single-voltage driven high-speed switch valve drive circuit cannot meet the requirements of fast opening and release of the high-speed switch valve, and provides a dual-voltage drive circuit for the high-speed switch valve

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