Capacitance Reducing Method for a Pulsed Activated Device and Associated Devices
First Claim
1. A capacitance reducing method for a pulsed activated device comprising acts ofrectifying an AC voltage to a pulsating DC voltage rectifying an AC voltage to a pulsating DC voltage;
- sensing a zero-crossing point of the pulsating DC voltage sensing the zero voltage of the pulsating DC voltage;
synchronizing the pulsating DC voltage synchronizing frequency and phase of a clock signal to the pulsating DC voltage;
setting pulse duration in a pulse period setting at least one rising time and at least one falling time of the clock signal corresponding to the pulsating DC voltage; and
turning ON and OFF of the pulsed activated device turning the pulsed activated device ON and OFF for at least one interval corresponding to the clock signal.
0 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to a capacitance reducing method for a pulsed activated device and associated devices, especially to a pulsed activated device having a capacitor, which improves power factor as well as eliminating the need for large capacitance. The method comprises acts of rectifying an AC voltage to a pulsating DC voltage, sensing a zero-crossing point of the pulsating DC voltage, synchronizing the pulsating DC voltage, setting pulse duration in a pulse period and turning ON and OFF of a pulsed activated device. The device comprises a load, a rectifier, a capacitor, a driver, a controller and an optional PFC circuit.
-
Citations
14 Claims
-
1. A capacitance reducing method for a pulsed activated device comprising acts of
rectifying an AC voltage to a pulsating DC voltage rectifying an AC voltage to a pulsating DC voltage; -
sensing a zero-crossing point of the pulsating DC voltage sensing the zero voltage of the pulsating DC voltage; synchronizing the pulsating DC voltage synchronizing frequency and phase of a clock signal to the pulsating DC voltage; setting pulse duration in a pulse period setting at least one rising time and at least one falling time of the clock signal corresponding to the pulsating DC voltage; and turning ON and OFF of the pulsed activated device turning the pulsed activated device ON and OFF for at least one interval corresponding to the clock signal. - View Dependent Claims (2, 3)
-
-
4. A device comprising
a load that being accepted with pulse supply; -
a rectifier being connected to an external AC power source, rectifying an AC voltage to a pulsating DC voltage; a capacitor having a capacitance and being connected to the rectifier, wherein the capacitance is a measure of the amount of charge stored for a given electric potential; a driver driving the load that using the charge stored on the capacitor that draws current from the capacitor; and a controller being connected between the rectifier and the driver that turns the driver OFF for at least one interval when the pulsating DC waveform voltage approaches zero voltage. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification