PTC HEATER CONTROL METHOD FOR VEHICLE

摘要

PURPOSE: A method for controlling a PTC heater for vehicles is provided to improve the safety of a vehicle by reducing the danger of high voltage. CONSTITUTION: A method for controlling a PTC heater for vehicles comprises following steps. The amount of wind passing through the PTC heater is measured(S10). Whether or not the amount of the wind is below a predetermined amount is determined(S20), The PTC heater stops when the amount of the wind is below the predetermined amount(S20). The current and voltage of the PTC heater are measured in the process of measuring the wind amount, and power consumption is calculated. The amount of the wind passing through the PTC heater is detected according to the power consumption. The power is applied to the PTC heater again after predetermined time(S40). [Reference numerals] (AA) Heating(PTC heater ON); (BB) Measuring the current and voltage of the PCT heater; (CC) Power consumption of the PCT heater = voltage x current; (DD) Predetermined time passed?; (S20) Power consumption of the PCT heater < Predetermined value?; (S30) Cutting off the power of the PCT heater; (S40) Restarting power supply to the PCT heater