A driving control circuit of a fast solenoid valve
A technology for driving control circuits and solenoid valves, applied in valve operation/release devices, valve details, valve devices, etc., can solve problems such as low stability and unsatisfactory control accuracy, and achieve improved response speed and control accuracy. The effect of small temperature rise and simple control signal
Active Publication Date: 2017-02-22
AVIC NO 631 RES INST
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Problems solved by technology
[0004] The present invention proposes a drive control circuit for a fast solenoid valve to solve the problems of unsatisfactory control accuracy and low stability in the prior art
Method used
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Embodiment Construction
[0042] Combining the test of this circuit in an electronic controller project, the implementation and use effect of this circuit will be explained in detail.
[0043] The RST1 and RST2 signals that control the general-purpose timer D1 are generated by the event manager of the DSP. The two control signals RST1, RST2 and the resulting pulse waveform are as follows: Image 6 As shown, 10ms to 40ms in the figure corresponds to a complete pulse period.
[0044] RST1 and RST2 are respectively controlled by the peripheral function pins PWM1 and PWM3 belonging to the DSP event manager. These two control signals are generated by the comparison unit 1 and the comparison unit 2, and use the general-purpose timer 1 together. 10~40ms is the general-purpose timer 1 In a count cycle of 1, the comparison match of comparison unit 1 is generated at 20ms, and RST1 is reversed; the comparison match of comparison unit 2 is generated at 30ms, and RST2 is reversed; at 40ms, the period of general tim...
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The invention provides a drive and control circuit for a fast solenoid valve. The drive and control circuit has the advantages that accuracy and stability are high, and control signals are simple. The drive and control circuit adjusts the intensity or the duration time of a strong shock current and a holding current according to the inherent characteristic of the solenoid valve and mainly comprises an output circuit and a feedback circuit. Two general timers are arranged for control over the strong shock current and the holding current respectively in the output circuit, an output signal OUT1 and an output signal OUT2 can be generated, when any signal is a high-level signal, a transistor V1 or V2 is switched on, then V3 is switched on through an MOSFET, PWM-OUT+ outputs +28V, and the solenoid valve is driven to work. The feedback circuit mainly comprises a difference operational amplifying circuit and a bleeder circuit, and the negative end PWM-OUT- of the solenoid valve is connected into a sampling resistor in the feedback circuit.
Description
technical field [0001] The invention relates to a drive control circuit of a fast solenoid valve. Background technique [0002] The fast solenoid valve is an executive component of the engine fuel regulation system, which can be widely used in aviation, ships, automobiles and other fields. By controlling the regular opening and closing of the fast solenoid valve, the fuel flow can be adjusted, thereby controlling the engine. speed change. [0003] Since the advent of the fast solenoid valve in the 1970s, many domestic and foreign manufacturers and companies have studied its structure and control methods. The research on the fast solenoid valve in my country began in the late 1980s. The fast solenoid valve driving circuit is mainly composed of discrete components. In recent years, some fast solenoid valve driving circuits realized by special integrated circuits have emerged. Some drive control circuits control the opening and closing of the solenoid valve by controlling the...
Claims
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IPC IPC(8): F16K31/06
CPCF16K31/06
Inventor 郝建邢金富于正同
Owner AVIC NO 631 RES INST