▎ 摘　　要

NOVELTY - The utility model claims a variable power graphene electric heating system, comprising: a leakage protector, a single-phase thyristor voltage regulating module, a PID analogue quantity output temperature controller, a temperature probe and a graphene heating sheet; the leakage protector is connected with the graphene heating sheet through a single-phase controlled silicon voltage device; the PID analogue quantity output temperature controller is connected with the temperature probe and the single-phase controlled silicon voltage regulating module; the PID analogue quantity output temperature controller and the temperature probe are installed in each heating section; the variable power graphene electric heating system outputs the voltage of the corresponding size according to the size of the analogue quantity to supply the graphene heating sheet, so that the graphene heating sheet generates heat energy proportional to the temperature difference; in most cases, the small current works; the circuit starting and stopping times are greatly reduced; the electric safety coefficient is greatly increased; and the temperature fluctuation is small; the heating comfort is improved; avoids the frequent starting and stopping of the power supply system, prolongs the service life of the electric system, improves the safety.