ELECTRIC HEATING TEMPERATURE CONTROL DEVICE Russian patent published in 2017 - IPC G05D23/22 

FIELD: electricity.

SUBSTANCE: electric heating temperature control device comprises two parallel-connected groups of high-power field-effect transistors. The gates of the first and second groups of high-power field-effect transistors are connected via current-limiting resistors to the outputs of the non-inverting and inverting drivers respectively. The output of the multivibrator is connected to the information inputs of the inverting and non-inverting driver, allowing inputs of which are connected to the output of the industrial controller, the last inputs are connected via a normalizing transducer with thermocouple output. Normalizing converters, inverting and non-inverting drivers, industrial controller and power-flop bus are connected to the positive terminal of the DC power supply, common terminal is connected to the common terminal of the analog transmitters, the general conclusions of the non-inverting and inverting drivers and with the general conclusions of the industrial controller and the multivibrator. DC power source is connected to the phase of the three-phase AC, three-phase of which are connected via a three-phase transformer through the diode rectifiers and battery electrolytic capacitors of its positive terminal to one of the terminals of the resistive heater. Its second terminal is connected to the drains of the two groups of high-power field-effect transistors, the sources of which, together with a common terminal and non-inverting inverting driver, the negative terminal of the battery electrolytic capacitors, and the midpoints of the secondary windings of the three-phase transformer are connected between themselves and with the device housing.

EFFECT: expanded range of operating currents of the time groups of field transistors, driven power of electrical heating increases as well.

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