Decoupling circuits
First Claim
1. A switchable circuit for receiving power inductively from an alternating current power supply and supplying output power to a load, said switchable circuit includes a receiving circuit which is substantially resonant at the frequency of the received power, wherein the receiving circuit is a series resonant circuit, the output of the receiving circuit is rectified in a rectifier, the rectified output is supplied to a boost connected switched mode power circuit which supplies output power, and a switch of the power circuit is controlled to maintain the output power voltage constant as the load varies and on the load where the rectifier current substantially reduces to zero, the switchable circuit for receiving power will substantially decouple itself from said alternating current power supply.
4 Assignments
0 Petitions
Accused Products
Abstract
Power taken inductively from the alternating current in a track is received by a resonant circuit which is output controlled by a switching circuit asynchronous with the frequency of the power supply. The switch on and off time is controlled to regulate the output power and the circuit is such that on light loads the resonant circuit decouples from the track.
19 Citations
6 Claims
- 1. A switchable circuit for receiving power inductively from an alternating current power supply and supplying output power to a load, said switchable circuit includes a receiving circuit which is substantially resonant at the frequency of the received power, wherein the receiving circuit is a series resonant circuit, the output of the receiving circuit is rectified in a rectifier, the rectified output is supplied to a boost connected switched mode power circuit which supplies output power, and a switch of the power circuit is controlled to maintain the output power voltage constant as the load varies and on the load where the rectifier current substantially reduces to zero, the switchable circuit for receiving power will substantially decouple itself from said alternating current power supply.
Specification