Inverter, power source, method and device for controlling inverter auxiliary power supply (APS)

The invention provides method and the device of a kind of inverter, power supply, control inverter accessory power supply, method comprises: detect at least voltage of two-way power supply with logic control element; Described logic control element is according to the stability of the voltage that detects, and control switch is selected one road power supply from described at least two-way power supply be described inverter power supply.Detect voltage by logic control element, and to select one road power supply according to the stability of the voltage that detects from two-way power supply at least be inverter power supply, realized the automatic switchover between the different electrical power of inverter, solve existing operation inconvenience and the low problem of reliability of bringing of switching manually, guaranteed reliability and the continuation of inverter power supply.