Ignition circuit of separately-excited arc lighter

Abstract

The invention relates to an ignition circuit of a separately-excited arc lighter. The ignition circuit comprises a direct-current power supply, a square wave generating circuit, a first driving and voltage boosting circuit and a first discharging needle, wherein the first driving and voltage boosting circuit comprises a power switch tube and a high-voltage transformer, a winding of the high-voltage transformer consists of a low-voltage winding and a high-voltage winding, and the power switch tube and the low-voltage winding in the high-voltage transformer are connected in series and then are connected to the two ends of the direct-current power supply; the first discharging needle is connected with the output end of the high-voltage winding, and a first driving branch is connected between the output end of the square wave generating circuit and the control end of the power switch tube; the power switch tube is disconnected and connected under the control of the output of the square wave generating circuit through the first driving branch, so that the current on the low-voltage winding is controlled. Due to the adoption of the separately excited driving mode, the ignition circuit is stable in work frequency, low in noise, large in instant starting power, easy to realize arc striking and reliable in work. Besides, the winding of the high-voltage transformer only consists of the low-voltage winding and the high-voltage winding, so that the production cost and the defective rate of the high-voltage transformer are reduced, and massive production is facilitated.

Description

technical field [0001] The invention relates to an ignition circuit for an arc lighter, in particular to an ignition circuit for a separately excited arc lighter. Background technique [0002] Arc lighters are becoming more and more widely accepted by people because they do not need to be filled with liquid fuel frequently, are safer to use, store and transport, are durable and more environmentally friendly, and their market prospects are getting wider and wider. The arc lighter includes a shell and an electronic ignition circuit arranged therein. The existing electronic ignition circuit usually includes a rechargeable battery as a DC power supply, a square wave generating circuit, a boost circuit, an amplifying circuit and an arc striking circuit, wherein the square wave generating circuit The self-excited oscillation circuit is basically used. Although this type of circuit is not complicated, there are some obvious disadvantages: 1. The power triode shutdown process is not...

AI Technical Summary

Problems solved by technology

The arc lighter includes a shell and an electronic ignition circuit arranged therein. The existing electronic ignition circuit usually includes a rechargeable battery as a DC power supply, a square wave generating circuit, a boost circuit, an amplifying circuit and an arc striking circuit, wherein the square wave generating circuit The self-excited oscillation circuit is basically used. Although this type of circuit is not complicated, there are some obvious disadvantages: 1. The power triode shutdown process is not crisp enough, the switching loss is large, and the efficiency is low; 2. The output power changes with the voltage of the battery. When the voltage is high, the output power is too large, resulting in waste of energy and causing the voltage to drop too fast. When the voltage is too low, the output power is too small, making it difficult to ignite the arc, thus shortening the use time of the battery after each charge; 3. Switch The frequency is affected by the power supply voltage, which is unstable and prone to noise; 4. The starting power is equal to the working power, and the requirements for arc ignition are high; 5. The high-voltage transformer must have a positive feedback winding, which is usually wound with thinner copper wire than other windings , Disconnection is prone to occur during glue filling, welding, assembly and transportation, which affects the yield and increases the difficulty of making the transformer; 6. The driving resistor has high working voltage and high power consumption, which affects the efficiency

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