Patent ID: 8531859
Filing Date: 2013-09-10
Classification: H02M

Abstract:
1. An alternating-current and direct-current conversion apparatus comprising: a first converter unit including a first converter and a high frequency transformer, wherein the first converter of the first converter unit is electrically connected between a direct-current source and the high frequency transformer; a switching unit electrically connected to the first converter unit, wherein the high frequency transformer of the first converter unit is electrically connected between the first converter and the switching unit; and a second converter unit electrically connected with the switching unit, wherein the second converter unit includes a rectifier and a second converter, wherein the rectifier of the second converter unit is electrically connected between the switching unit and the second converter, wherein the second converter of the second converter unit is electrically connected between the rectifier and an alternating-current source, wherein: the switching unit is electrically connected between the first converter unit and the second converter unit to convert an alternating-current power into a direct-current power or to convert a direct-current power into an alternating-current power by a switching operation of the switching unit; the switching unit is electrically connected to an external mains power supply; the switching unit includes a first switch and a second switch; the first switch of the switching unit is electrically connected between the first converter unit and the second converter unit to connect the first converter unit with the second converter unit or electrically connected between the external mains power supply and the second converter unit to connect the external mains power supply with the second converter unit; the second switch of the switching unit is electrically connected between the first converter unit and the second converter unit; and the switching unit is operable between: