US 10,122,207 B2 · Automatic transfer switch circuits and control methods

Abstract

According to some aspects of the present disclosure, automatic transfer switch circuits and control methods are disclosed. Example automatic transfer switch circuits include a first voltage input having a line terminal and a neutral terminal, a second voltage input having a line terminal and a neutral terminal, a voltage output having a line output terminal and a neutral output terminal, a first relay coupled to the line terminal of the first voltage input and the line terminal of the second voltage input, a second relay coupled to the neutral terminal of the first voltage input and the neutral terminal of the second voltage input, a third relay coupled between the line output terminal and at least one of the first relay and second relay, a fourth relay coupled between the neutral output terminal and at least one of the first relay and the second relay, and a controller.

Claims19

Dependent claims

An automatic transfer switch circuit comprising:

a first voltage input having a line terminal and a neutral terminal;
a second voltage input having a line terminal and a neutral terminal;
a voltage output having a line output terminal and a neutral output terminal;
a first relay coupled to the line terminal of the first voltage input and the line terminal of the second voltage input;
a second relay coupled to the neutral terminal of the first voltage input and the neutral terminal of the second voltage input;
a third relay coupled between the line output terminal and at least one of the first relay and second relay;
a fourth relay coupled between the neutral output terminal and at least one of the first relay and the second relay;
and
a controller coupled to the relays to control a state of each of the relays.

6 more elements

A method of operating an automatic transfer switch circuit, the circuit including a first voltage input having a line terminal and a neutral terminal, a second voltage input having a line terminal and a neutral terminal, a voltage output having a line output terminal and a neutral output terminal, a first relay coupled to the line terminals of the first voltage input and the second voltage input, a second relay coupled to the neutral terminals of the first voltage input and the second voltage input, a third relay coupled between the line output terminal and at least one of the first relay and the second relay, and a fourth relay coupled between the neutral output terminal and at least one of the first relay and the second relay, the method comprising:

placing the first relay in a first state to couple the line terminal of the first voltage input to a first output terminal of the first relay;
and
placing the first relay in a second state to couple the line terminal of the second voltage input to a second output terminal of the first relay.

Dependencies are inferred from the claim text.

Automatic transfer switch circuits and control methods

Life of this patent

Automatic transfer switch circuits and control methods

Life of this patent

Abstract

Claims19