SYSTEM FOR INDUCTIVE POWER TRANSFER
First Claim
1. A synchronous drive system for controlling the amplitude of oscillation in a primary LC circuit comprising;
- a primary coil module having a switching coil amplifier communicating with the primary LC circuit for amplifying a pre-amplified source voltage and for outputting an amplified source voltage to the primary LC circuit,a resonance control module communicating with the primary LC circuit and said switching coil amplifier for detecting the natural resonance frequency of the primary LC circuit and for detecting each actual oscillation of the primary LC circuit over an oscillation cycle and for selectively delivering said pre-amplified source voltage to said switching coil amplifier based on the natural resonance frequency of primary LC circuit and each actual oscillation of the primary LC circuit to control the magnitude of each actual oscillation while synchronously operating the primary LC circuit at approximately natural resonance.
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Accused Products
Abstract
An inductive power transfer system including a synchronous drive system having a resonance control module. The resonance control module includes a primary coil module with a primary LC circuit. The resonance control module seeks and detects the resonant frequency of the primary LC circuit. The synchronous drive system further includes a switching coil amplifier for selectively energizing the primary coil to keep the primary LC circuit operating at or as close as possible to its natural resonant frequency. The inductive power transfer system may further include a secondary receiving unit. The secondary receiving unit includes a secondary LC circuit coupled with the primary LC circuit for inductively receiving power. The secondary LC circuit includes an LC filter and a rectifier unit for operating the secondary LC circuit at a mutual resonance with the primary LC circuit.
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Citations
41 Claims
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1. A synchronous drive system for controlling the amplitude of oscillation in a primary LC circuit comprising;
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a primary coil module having a switching coil amplifier communicating with the primary LC circuit for amplifying a pre-amplified source voltage and for outputting an amplified source voltage to the primary LC circuit, a resonance control module communicating with the primary LC circuit and said switching coil amplifier for detecting the natural resonance frequency of the primary LC circuit and for detecting each actual oscillation of the primary LC circuit over an oscillation cycle and for selectively delivering said pre-amplified source voltage to said switching coil amplifier based on the natural resonance frequency of primary LC circuit and each actual oscillation of the primary LC circuit to control the magnitude of each actual oscillation while synchronously operating the primary LC circuit at approximately natural resonance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 33, 38, 39, 40, 41)
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28. An inductive power transfer system for inductively transferring power from a primary unit to a secondary unit comprising:
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a synchronous drive system having a resonance control module for generating a voltage source and having a primary coil module for generating an electromagnetic field based on said voltage source, said primary coil module including a primary LC circuit having a natural resonant frequency for generating said magnetic field based on said source voltage, a secondary receiving system being located in proximity with said synchronous drive system for receiving said magnetic field and for generating a charging voltage for charging a battery, said resonance control module circuit being in communication with said primary coil module for detecting the resonant frequency of a primary LC circuit and for selectively powering said primary LC circuit based on said desired resonance amplitude signal and an actual resonance amplitude signal to operate said primary LC circuit at the natural resonance frequency. - View Dependent Claims (29, 30, 31, 32)
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34. A secondary LC unit for receiving inductively transferred power from a primary LC circuit generating a magnetic field comprising;
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a secondary LC circuit having an secondary capacitor and a secondary coil for being placed in proximity to the magnetic field of the primary LC circuit operating at natural resonance for generating a pre-rectified charge voltage, a LC filter communicating with said secondary coil module for inhibiting electromagnetic emission generated by said secondary module, and a rectifier module communicating with said LC filter for converting said pre-rectified charge voltage into a rectified charge voltage, said secondary coil communicating with the primary LC circuit for operating the secondary LC circuit at a mutual resonance with the primary LC circuit to increase the efficiency of power transferred between the primary LC circuit and the secondary LC circuit and for improving special freedom. - View Dependent Claims (35, 36, 37)
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Specification