Patent ID: 9354643
Filing Date: 2016-05-31
CPC Classification: G05F,H02M,H05B,Y02B

Claim Text:
1. A method comprising: comparing a first value to alternating current that is delivered to a load at a first point in time; in response to determining that the alternating current delivered to the load at the first point in time is greater than the first value, a first power switch transmitting the alternating current to the load during a first period of time, wherein the first power switch is activated after the start of each half cycle of the alternating current; comparing the first value to the alternating current that is delivered to the load at a second point in time; in response to determining that the alternating current delivered to the load at the second point in time is less than the first value, a pair of second power switches transmitting the alternating current to the load during a second period of time, wherein one of the pair of second power switches is activated at the start of each positive half cycle of the alternating current, and wherein the other of the pair of second power switches is activated at the start of each negative half cycle of the alternating current; wherein the first and second periods do not overlap in time; wherein the first power switch is not activated during the second period, and neither of the pair of second power switches is activated during the first period.