AC voltage regulating circuit and method and transformer
AssigneesYongsong Zhang, Shaohui Feng
InventorsShaohui Feng, Yongsong Zhang, Zankang Zhang
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Abstract
An AC voltage regulating circuit, method and transformer are disclosed in the present application. The AC voltage regulating circuit includes an AC/DC converter, a switch converter, and a switch controller. The AC/DC converter includes an AC power supply input end and a DC conversion output end. The switch converter includes a switch AC input end, a switch DC input end, a regulated voltage output end, an AC controllable switch assembly, a positive voltage DC controllable switch assembly and a negative voltage DC controllable switch assembly. The switch controller includes a power sampling end, a reference sampling end, an AC control end, a DC positive voltage control end and a DC negative voltage control end.
Claims12
An AC voltage regulating circuit, comprising:
- an AC/DC converter, comprising an AC power supply input end and a DC conversion output end, wherein the AC power supply input end is used for connecting an AC power supply;
- a switch converter, comprising a switch AC input end, a switch DC input end, a regulated voltage output end, an AC controllable switch assembly, a positive voltage DC controllable switch assembly and a negative voltage DC controllable switch assembly, wherein the switch AC input end is used for connecting the AC power supply, and the switch DC input end is used for acquiring a voltage regulated DC output from a DC output end of the AC/DC converter;
- wherein the AC controllable switch assembly is connected to a path between the switch AC input end and the regulated voltage output end, and when the AC controllable switch assembly is on, the regulated voltage output end outputs an AC power supply input from the switch AC input end;
- wherein the positive voltage DC controllable switch assembly is connected between the switch DC input end and the regulated voltage output end, and when the positive voltage DC controllable switch assembly is on, the regulated voltage output end outputs positive voltage regulated DC;
- wherein the negative voltage DC controllable switch assembly is connected between the switch DC input end and the regulated voltage output end, and when the negative voltage DC controllable switch assembly is on, the regulated voltage output end outputs negative voltage regulated DC;
- and
- a switch controller, comprising a power sampling end used for connecting the AC power supply, a reference sampling end used for acquiring voltage regulated DC voltage, an AC control end connected to a control end of the AC controllable switch assembly, a DC positive voltage control end connected to a control end of the positive voltage DC controllable switch assembly and a DC negative voltage control end connected to a control end of the negative voltage DC controllable switch assembly.
An AC voltage regulating method comprising:
- converting an AC power supply to a voltage regulated DC;
- acquiring and comparing voltage values of the AC power supply and voltage regulated DC;
- and
- selecting the AC power supply, positive voltage regulated DC or negative voltage regulated DC as a voltage regulated power supply output based on comparison strategy;
- wherein the comparison strategy comprises:
- in a positive half cycle of the AC power supply, comparing voltage values of the AC power supply and voltage regulated DC, and selecting one of the AC power supply and the positive voltage regulated DC having a lower voltage value as the voltage regulated power supply output;
- and
- in a negative half cycle of AC power supply, comparing voltage values of the AC power supply and voltage regulating DC, and selecting one of the AC power supply and the negative voltage regulated DC having a lower absolute value of voltage as the voltage regulated power supply output.
Dependencies are inferred from the claim text.