Circuit of self-excited oscillation voltage-multiplying and constant-current control electromagnetic valve and gas stove using same

Abstract

The invention discloses a circuit of a self-excited oscillation voltage-multiplying and constant-current control electromagnetic valve and a gas stove using the same. The circuit of the self-excited oscillation voltage-multiplying and constant-current control electromagnetic valve comprises a self-excited oscillation module for generating a PWM signal, a full-wave rectification module for outputting a voltage-multiplying driving voltage according to the PWM signal, and a negative feedback amplification module for outputting a negative feedback constant current according to the voltage-multiplying driving voltage to control the electromagnetic valve. According to the circuit of the self-excited oscillation voltage-multiplying and constant-current control electromagnetic valve, the self-excited oscillation module generates a PWM signal, and then the full-wave rectification module outputs a voltage-multiplying driving voltage according to the PWM signal of the self-excited oscillation module, and finally, the electromagnetic valve is controlled by the negative feedback amplification module according to the voltage-multiplying driving voltage negative feedback constant-current output of the full-wave rectification module, so that the stable output of the electromagnetic valve is realized by adopting a self-excited oscillation voltage-multiplying and constant-current control mode, the control of a switching power supply chip is abandoned, peripheral components are reduced, the hardware cost in the design process is reduced, and therefore, stable gas injection of the gas stove isrealized.

Description

technical field [0001] The invention belongs to the technical field of solenoid valves, and in particular relates to a circuit for self-excited oscillation voltage doubling and constant current control solenoid valves and a gas stove using the same. Background technique [0002] The solenoid valve driving circuit on the market generally adopts the "Boost" in the switching power supply + the switching power supply chip TDA4863 as the boost circuit. [0003] However, the disadvantages of the existing solenoid valve drive circuit include high hardware cost, the need for a dedicated chip, and waste of more peripheral component resources. In the past, many R&D personnel or enterprises ignored the innovation and improvement of this part of the application due to sticking to the rules and limitations of technological improvement, which directly led to objective phenomena such as low product reliability, high development process costs, and brand quality decline. Contents of the in...

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Problems solved by technology

[0003] However, the disadvantages of the existing solenoid valve drive circuit include high hardware cost, the need for a dedicated chip, and the waste of more peripheral component resources, etc.

In the past, many R&D personnel or enterprises ignored the innovation and improvement of this part of the application due to sticking to the rules and the limitations of technological improvement, which directly led to objective phenomena such as low product reliability, high development process costs, and brand quality decline.

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