Understanding of two control methods of stainless steel solenoid valveRelease time: 2019-01-04 Clicks: 50 times
Stainless steel solenoid valve is used to control the direction of hydraulic flow. The mechanical devices of the factory are generally controlled by hydraulic steel, so stainless steel solenoid valves are used. The stainless steel solenoid valve has a closed cavity. There are through holes in different positions. Each hole leads to a different oil pipe. The middle of the cavity is a valve. On both sides are two electromagnets. Which side of the magnet coil will energize the valve body. Which side is attracted to, by controlling the movement of the valve body to block or leak different oil discharge holes, and the oil inlet is always open, the hydraulic oil will enter different oil discharge pipes, and then pushed by the oil pressure The oily piston, the piston drives the piston rod, and the piston rod drives the mechanical device. In this way, the mechanical movement is controlled by controlling the current of the electromagnet.
The control method of stainless steel solenoid valve can be basically divided into two types, zero control and fire control.
1. Control the "fire"
Fire control means that one end of the stainless steel solenoid valve is often grounded. The control unit controls the power supply of the solenoid valve. In the non-operating state, both ends of the solenoid valve are at zero potential. When the control signal is high, the PNP transistor is turned off and the electromagnetic The valve is not energized; when the control signal is low, the PNP transistor is turned on, and the power is applied to the solenoid valve through the emitter-collector of the transistor, and the solenoid valve is energized and enters the normal working state. The early solenoid valve control circuits of the automatic transmissions of Hyundai, Toyota, and Chrysler adopted the fire control method of controlling the power supply.
2. Control "zero"
Zero control means that one end of the stainless steel solenoid valve is always powered. The control unit controls the grounding circuit of the solenoid valve. In the non-working state, the two ends of the solenoid valve are both at a high potential. When the control signal is at a high potential, the NPN transistor is turned on. Power is applied to the solenoid valve through the collector and emitter of the triode, and the solenoid valve must be energized to enter normal work.
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