Switching selector for selecting a power source
AssigneeAten International Co., Ltd.
InventorYung-Feng Lee
Life of this patent
Estimating the term…
Abstract
A switching selector for selecting a power source from two power sources. It includes a controller, a detection circuit, a transistor and two groups of four transfer switches or relays, wherein the controller is a micro-processor and the detection circuit includes two transformers. Primary winding of each of two transformers is connected to two different power sources, and secondary winding of each of two transformers is connected to input of the controller. Output of the controller is connected to a base of a transistor for controlling the transfer switches. Each group of four transfer switches form a redundant switch for selecting one of the two power sources, where the four transfer switches are connected such that the selection function is not affected when any one of the transfer switches malfunctions.
Claims9
A power source selection switch, comprising:
- a first transfer switch having a first closed contact and a first normally open contact;
- a second transfer switch having a second closed contact and a second normally open contact, wherein a first contact of the second normally open contact is coupled to the first closed contact;
- a third transfer switch having a third closed contact and a third normally open contact, where a second contact of the third normally open contact is coupled to the first closed contact;
- and
- a fourth transfer switch having a fourth closed contact and a fourth normally open contact, where the second closed contact is coupled to a third contact of the fourth normally open contact, and the third closed contact is coupled to a fourth contact of the fourth normally open contact,
- wherein a fifth contact of the first normally open contact is coupled to the first power source, a sixth contact of the second normally open contact is coupled to the first power source, a seventh contact of the first normally open contact is coupled to the second power source, and an eighth contact of the third normally open contact is coupled to the second power source.
Dependencies are inferred from the claim text.