At the time of the formation of the economy, there was a need for specialized devices. The main task was to create non-contact switching methods and their implementation in the practical conditions of the current production. This became possible with the advent of semiconductor devices in power electrical
schemes. The thyristor power controller has become widely used both in all industrial areas and in everyday life. With its help, smooth control was made over the consumed electricity in household appliances and power plants. Its scope of application is huge - from well-known energy-saving devices, for example, for soldering irons, to temperature control in induction furnaces.
Thus, the thyristor power controller turned out to be effective when working with an active-inductive load. Its use in electric heating furnaces or appliances is highly advisable. It saves a lotpower consumption and high efficiency. Practically 99 percent is used in the consumer's installation. It is also necessary to note the high reliability of the device. To control the temperature, there is no need to increase the speed of the control system. Smooth switching on / off of power modules has a positive effect on their operation and significantly extends their service life. This thyristor power controller has good performance.
The nature of the load should also be noted. Heating devices, as a rule, have a low inductance. In such an electrical circuit, the thyristor power controller is not subject to adverse effects. They certainly arise when working with inductance. Reverse surges are practically excluded here, which simplifies the design of the device itself and also extends the life of the power modules.
The good restorative properties of semiconductor devices are fully utilized in the operation of such devices. In case of short-term overloads with their subsequent removal, the thyristor is restored and continues to operate in the same mode. But overloads in such circuits are an exception. In normal mode, thyristor power controllers operate with a well-chosen PV. Typically, the average current delivered to the load is less than the rated current of the power modules.
Innovative schemes are often used as a management system. The use of a PWM controller allowedget rid of high overloads when starting powerful devices. Such power regulators are not subject to the harmful effects of super-high starting currents. This also extends the life of the converters and allows you to control all the necessary parameters in the tracking mode.
Despite the appearance of new elements, for example, IGBT modules, thyristor power controllers hold strong positions in all areas. According to a number of their performance characteristics, they are ahead of many innovative devices.
