HEATING TEMPERATURE REGULATOR Russian patent published in 1998 - IPC

FIELD: electronic engineering. SUBSTANCE: heating and temperature measurements are spaced in time, and heating power is determined by comparison of preset and measured temperature values in each half-period of supply voltage with heating power measured at the beginning or end of half-period. Temperature regulator has temperature setting device 1 connected to input of comparison element 2, temperature-sensitive element 3, synchronizing pulse former 6, and series-connected heater 9 and switch 10. In addition, temperature regulator is provided with series-connected pulse-duration modulator 5 and AND gate 8, storage-access element 4, univibrator 7 connected with its output to control input of storage-access element and to the second input of AND gate 8. Triggering inputs of pulse-duration modulator 5 and univibrator 7 are connected to output of former 6. EFFECT: higher accuracy of control. 1 dwg