Load Control for Bi-Directional Inductive Power Transfer Systems

摘要

A control method for use in a primary side power converter (1) of an inductive power transfer (IPT) system. The power transfer from the primary side to one or more secondary pick-ups is monitored, and the operating frequency of the primary side power converter (1) is varied in proportion to a difference between the monitored power transfer and a power capability of the primary side power converter. The frequency variation can be sensed by the or each pick-up (2) to regulate the power transfer and to prevent overloading from occurring.

主权项

1. A control method for use in a primary side power converter of an inductive power transfer (IPT) system, the method comprising the steps of:
sensing power transfer between the primary side power converter and one or more IPT pick-ups with which the primary side power converter may be inductively coupled, in use; and varying the operating frequency of the primary side power converter in proportion to a difference between said power transfer and a power capability of the primary side power converter, whereby said variation may be sensed by the or each pick-up to regulate said power transfer.