FIELD: packing equipment, particularly with the use of polyethylene bags in food, chemical and other industries.
SUBSTANCE: method involves measuring instantaneous voltage with constant frequency during heating process; calculating instantaneous heating pulse power value after each voltage measurement; summing instantaneous heating pulse power values; comparing summary heating pulse power value with predetermined one after each calculation and forming corresponding control signal. If calculated summary value is less than predetermined one heating process is continued. If calculated summary value exceeds predetermined one heating process is stopped.
EFFECT: increased temperature stability of impulse heating member in wide range of supply voltage, possibility of linear temperature regulation, decreased disturbances.
2 dwg
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