Patent ID: 11917738
Assignee: SAVANT TECHNOLOGIES LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. The dummy load control circuit according to claim 10, wherein controlling, using the input voltage of the power input end, the voltage of the charge/discharge control end through the charge/discharge control module, so as to control the on/off of the third switch, thereby controlling the charge/discharge time of the capacitor, so that the voltage at the one end of the capacitor is less than the first turn-on voltage when the power supply input end is connected to the triac dimmer, and is greater than the first turn-on voltage when the power supply input end is not connected to the triac dimmer comprises:
in response to the input voltage of the power supply input end after rectification being an AC half-wave with a period T when the power supply input end is not connected to the triac dimmer, within the period T: the capacitor is charged by the constant voltage source when the third switch is turned off, the capacitor discharges via the discharge resistor when the third switch is turned on, and the voltage at the one end of the capacitor is still greater than the first turn-on voltage after discharging; and
in response to the input voltage of the power supply input end after rectification being a phase-cut AC half-wave with the period T when the power supply input end is connected to the triac dimmer, within the period T: the capacitor is charged via the constant voltage source when the third switch is turned off, the capacitor discharges via the discharge resistor when the third switch is turned on, and the voltage at the one end of the capacitor is still less than the first turn-on voltage after charging.