Energy-saving power supply apparatus

摘要

An energy-saving power supply apparatus includes a bridge rectifier, a diode bypass circuit and a control circuit. The diode bypass circuit is electrically connected to the bridge rectifier. The control circuit is electrically connected to the diode bypass circuit and the bridge rectifier. The bridge rectifier includes a plurality of diodes. After the control circuit receives a power start signal, the control circuit is configured to control the diode bypass circuit, so that a part of the diodes are bypassed to save energy.

主权项

1. An energy-saving power supply apparatus comprising:
a bridge rectifier; a diode bypass circuit electrically connected to the bridge rectifier; a control circuit electrically connected to the diode bypass circuit and the bridge rectifier; and a negative temperature coefficient thermistor electrically connected to the diode bypass circuit and the bridge rectifier, wherein after the control circuit receives a power start signal, the control circuit is configured to control the diode bypass circuit; wherein the bridge rectifier comprises: a first diode electrically connected to the diode bypass circuit and the control circuit; and a second diode electrically connected to the first diode, wherein the diode bypass circuit comprises: a first switch electrically connected to the bridge rectifier and the control circuit, wherein when a power is in a first polarity cycle and a voltage absolute value of the power is not greater than a predetermined voltage value, the control circuit is configured to turn off the first switch, so that a path of the power is: the first diode, a load apparatus, the negative temperature coefficient thermistor, the second diode and an alternating current power supply apparatus; wherein when the power is in the first polarity cycle and the voltage absolute value of the power is greater than the predetermined voltage value, the control circuit is configured to turn on the first switch, so that the path of the power is: the first diode, the load apparatus, the first switch and the alternating current power supply apparatus.