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

Claim 22:
23. The dummy load control method according to claim 22, wherein a charge/discharge rate of the capacitor is set so that within the period T:
when a time period during which the input voltage is in the range from the zero voltage to the second power supply voltage is less than a predetermined time period, after the capacitor discharges in the time period during which the input voltage is in the range from the zero voltage to the second power supply voltage, the voltage of the capacitor is still greater than the first turn-on voltage; and
when a time period during which the input voltage is in the range from the zero voltage to the second power supply voltage is greater than the predetermined time period, after the capacitor is charged in a time period during which the input voltage is out of the range from the zero voltage to the second power supply voltage, the voltage of the capacitor is still less than the first turn-on voltage,
wherein within the period T, a time period during which the voltage is the zero voltage in the phase-cut AC half-wave is longer than a time period during which the voltage is the zero voltage in the AC half-wave by at least the predetermined time interval, so that the time period during which the input voltage is in the range from the zero voltage to the second power supply voltage when the power supply input end is not connected to the triac dimmer is less than the predetermined time period, and the time period during which the input voltage is in the range from the zero voltage to the second power supply voltage when the power supply input end is connected to the triac dimmer is longer than the predetermined time period.