Patent ID: 9564834
Date: 2017-02-07
CPC Classifications: H02M

Claim:
1. An alternating current to direct current converter system comprising: an alternating current power supply system comprising a first output end and a second output end; an external electronic load having a first end and a second end; a first MOS transistor having a drain electrode, a source electrode and a gate electrode, the drain electrode of the first MOS transistor connected to the first output end of the alternating current power supply, and the source electrode of the first MOS transistor connected to the first end of the external electronic load; a first control module connected to the gate electrode of the first MOS transistor and the source electrode of the first MOS transistor, the first control module configured to control the drain electrode of the first MOS transistor to connect the source electrode of the first MOS transistor in event the first output end of the alternating current power supply has a positive voltage with respect to the alternating current power supply in a first half cycle, and control the drain electrode of the first MOS transistor to disconnect the source electrode of the first MOS transistor in event the second output end of the alternating current power supply has a positive voltage with respect to the alternating current power supply in a second half cycle; a first switch connected to the first end of the external electronic load and the second output end of the alternating current power supply; and a second control module connected to the first switch, the second control module configured to control the first switch to activate in event the second output end of the alternating current power supply has a positive voltage with respect to the alternating current power supply in the second half cycle and control the switch to turn off in event the first output end of the alternating current power supply has a positive voltage with respect to the alternating current power supply in the first half cycle.