Thyristor power regulator: principle of operation and scope

At the time of economic development, there was a need for specialized devices. The main task was to create contactless methods of commutation and their implementation in the practical conditions of the current production. This became possible with the advent of semiconductor devices in power electrical Schemes. Thyristor power regulator has become widely used both in all production areas and in everyday life. With its help, a smooth control over the consumed electricity in household appliances and power plants was made. The scope of its application is enormous - from all known energy-saving devices, for example, for soldering irons, and to temperature regulation in induction furnaces.

Thus, the thyristor power regulator proved to be effective when working with an active-inductive load. Its use in electric heaters or appliances is highly advisable. It significantly saves consumed electricity and has a high efficiency. Virtually 99 percent is used in the installation of the consumer. It is also necessary to note the high reliability of the device. For temperature control, there is no need to increase the speed of the control system. Smoothly turning on / off the power modules has a positive effect on their operation and significantly extends their service life. Such a thyristor power controller has good performance characteristics.

Also it should be noted the nature of the load. Heating devices, as a rule, have a small inductance. In such an electrical circuit, the thyristor power controller is not subject to adverse effects. They certainly arise when working with inductance. Reverse overvoltages are practically excluded, which simplifies the very design of the device and also extends the life of the power modules.

Good recovery properties of semiconductor devices are fully involved in the operation of such devices. During short-term overloads with their subsequent removal, the thyristor is restored and continues to operate in the same mode. But overloading in such chains is an exception. In normal mode, thyristor power controllers operate with a competently matched PV. Typically, the average current delivered to the load is less than the nominal current of the power modules.

As a control system, innovative schemes are often used. Using PWM-regulator allowed to get rid of high overloads when launching powerful devices. Such power controllers are not subject to harmful influence of super-large starting currents. This also extends the life of the converters and allows monitoring of all necessary parameters in the monitoring mode.

Despite the appearance of new elements, for example, IGBT-modules, thyristor power controllers hold strong positions in all spheres. For a number of their performance characteristics, they are ahead of many innovative devices.