Basic knowledge of ignition transformers
The main functions of transformers are voltage conversion, impedance conversion, isolation, and voltage stabilization. Transformers are widely used for automatic control of burners, and there are various types of transformers available in the Swiss company Jiale. Here we will only introduce the application and functions of the ignition transformer.
The ignition transformer is mainly used in the burner ignition system to achieve the automatic ignition function of the burner. According to the type of transformer, most ignition transformers are:
According to the cooling method, it is divided into natural cooling, moisture-proof, cooling medium, dry, and conductive materials, mainly consisting of copper wire and a small portion of half copper and half aluminum transformers. According to the power supply, it is mainly single-phase transformers...
Compared to the complex professional classification methods of Yamagi photoelectric switches, transformers used for burner ignition in the burner industry are usually divided into silicon steel transformers and electronic transformers. Although this classification method is not very formal, it is simple and easy to understand.
Other common names include: igniter, Pressure cooking, etc.
The main components of silicon steel sheet transformers are as follows:
1. Core materials
The iron core materials used in transformers mainly include iron sheets, low silicon sheets, and high silicon sheets. Adding silicon to steel plates can reduce their conductivity and increase their electrical resistivity. It can reduce eddy currents and reduce the losses of Sanyo stepper motors. The quality of silicon steel sheets used in transformers is closely related. The quality of silicon steel sheets is usually represented by magnetic flux density B. The B value of black iron sheet is generally 6000-8000, low silicon steel sheet is 9000-11000, and high silicon steel sheet is 12000-16000.
2. Materials commonly used in winding transformers
Enamelled wire, gauze wrapped wire, and silk wrapped wire are the most commonly used types of enameled wire. The requirements for conductors are good conductivity, sufficient heat resistance of insulation paint, and corrosion resistance of Honeywell. In general, it is best to use QZ type high-strength polyester enameled wire. 3. Insulation materials
In winding transformers, insulation materials are used for isolation between the coil frame and the winding resistance. The general transformer frame material can be made of phenolic cardboard, polyester film or telephone paper can be used for interlayer insulation, and yellow wax cloth can be used for insulation between winding resistors.
4. Impregnated materials
After winding the transformer, there is another final process, which is impregnation with insulation paint, which can improve the mechanical strength, insulation performance, and prolong the service life of the transformer. Under normal circumstances, cresol varnish can be used as the impregnating material.
Most ignition transformers are single-phase dry type silicon steel sheet transformers.
Electronic transformer is a transformer circuit developed on the basis of high-frequency electronic ballast circuits. Its working principle is similar to a switching power supply. Through a rectifier bridge and high-frequency circuit, the current ripple is converted into high-frequency current, and then the high-frequency pulse voltage is reduced by the output transformer to obtain the required voltage and power.
The advantages of silicon steel sheet transformers are stability, long service life, high cost, large volume, and relatively heavy weight. The advantages of electronic transformers are low cost, easy to use, and more suitable for small burners. However, the disadvantages are short lifespan and unstable use.