Wireless power transfer with generalized harmonic current
AssigneeFord Global Technologies, LLC
InventorsShuitao Yang, Fan Xu, Baoming Ge, Lihua Chen, Mohammed Khorshed Alam
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Abstract
A wireless charging arrangement has primary side circuitry including a voltage source, switches, and a primary coil arranged to couple with a secondary coil. The primary side circuitry forms a series resonant converter when transferring power from the primary coil to the secondary coil. The wireless charging arrangement also includes a controller to selectively activate the switches to cause the transferring such that for each fundamental cycle, a pair of consecutive active resonant cycles have same polarity.
Claims15
A wireless charging arrangement comprising:
- primary side circuitry, including a voltage source, switches, and a primary coil arranged to couple with a secondary coil, configured to form a series resonant converter when transferring power from the primary coil to the secondary coil;
- and
- a controller configured to selectively activate the switches to cause the transferring such that for each fundamental cycle, a pair of consecutive active resonant cycles have same polarity.
A wireless charger comprising:
- primary side circuitry, including switches and a primary coil that is arranged to couple with a secondary coil, configured to form a series resonant converter when transferring power;
- and
- a controller configured to selectively activate the switches to cause the transferring such that for each fundamental cycle, a quotient of a total number or resonant cycles and a total number of active resonant cycles has a non-integer value.
A wireless charger comprising:
- primary side circuitry, including switches and a primary coil that is arranged to couple with a secondary coil, configured to form a series resonant converter when transferring power, and
- a controller configured to selectively activate the switches to cause the transferring such that for each fundamental cycle, a quotient of a total number or resonant cycles and a total number of active resonant cycles has an integer value greater than one, and the total number of active resonant cycles is greater than one.
Dependencies are inferred from the claim text.