INDUCTIVELY CONTROLLED SERIES RESONANT AC POWER TRANSFER
First Claim
Patent Images
1. A method of providing an AC supply from IPT pickup having a pickup coil and tuning capacitor connected in series to provide a series resonant circuit, the method comprising varying a phase angle between an open circuit pickup coil voltage and a pickup coil inductor current to provide a controlled AC supply to an output of the pickup.
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Accused Products
Abstract
An inductive power transfer pickup circuit has a pickup coil (L2) and tuning capacitor (C2) connected in series to provide a series resonant circuit. A bi-directional switch (S1) is used to vary the phase angle between the open circuit pickup coil voltage (Voc) and the pickup coil inductor current (iL) to provide a controlled AC supply to an output of the pickup.
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Citations
26 Claims
- 1. A method of providing an AC supply from IPT pickup having a pickup coil and tuning capacitor connected in series to provide a series resonant circuit, the method comprising varying a phase angle between an open circuit pickup coil voltage and a pickup coil inductor current to provide a controlled AC supply to an output of the pickup.
- 9. An IPT pickup controller for a pickup having a pickup coil and a tuning capacitor connected in series with the pickup coil, the controller being adapted to control one or more switches to control a pickup coil inductor current to thereby vary a phase angle between a pickup coil open circuit voltage and the pickup coil inductor current.
- 12. An IPT pickup comprising a pickup coil and a tuning capacitor connected in series to provide a series resonant circuit, and a controller to vary a phase angle between a pickup coil open circuit voltage and a pickup coil inductor current to thereby provide a controlled AC supply to an output of the pickup.
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Specification