Method and system for contactless power transfer in a gate driver unit
First Claim
1. A gate driver unit comprising:
- a first power exchanging coil operatively coupled to a power source;
a second power exchanging coil configured to receive power from the first power exchanging coil via a magnetic field;
a field focusing element disposed between the first power exchanging coil and the second power exchanging coil and configured to focus the magnetic field onto the second power exchanging coil;
a compensation coil disposed between the field focusing element and the second power exchange coil and configured to compensate a change in phase angle resulting from a misalignment of the first power exchanging coil and the second power exchanging coil;
a first circuit coupled to the second power exchanging coil; and
a gate drive subunit operatively coupled to the first circuit and configured to provide an output signal to a control terminal corresponding to a controllable switch of a second circuit.
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Accused Products
Abstract
A gate driver unit is presented. The gate driver unit includes a first power exchanging coil operatively coupled to a power source. The gate driver unit includes a second power exchanging coil configured to receive power from the first power exchanging coil via a magnetic field and a field focusing element disposed between the first power exchanging coil and the second power exchanging coil and configured to focus the magnetic field onto the second power exchanging coil. The gate driver unit also includes a first circuit coupled to the second power exchanging coil. The gate driver unit includes a gate drive subunit operatively coupled to the first circuit and configured to provide an output signal to a control terminal corresponding to a controllable switch of a second circuit. A magnetic resonance imaging system and a method of contactless power transfer in a magnetic resonance imaging system are also presented.
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Citations
28 Claims
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1. A gate driver unit comprising:
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a first power exchanging coil operatively coupled to a power source; a second power exchanging coil configured to receive power from the first power exchanging coil via a magnetic field; a field focusing element disposed between the first power exchanging coil and the second power exchanging coil and configured to focus the magnetic field onto the second power exchanging coil; a compensation coil disposed between the field focusing element and the second power exchange coil and configured to compensate a change in phase angle resulting from a misalignment of the first power exchanging coil and the second power exchanging coil; a first circuit coupled to the second power exchanging coil; and a gate drive subunit operatively coupled to the first circuit and configured to provide an output signal to a control terminal corresponding to a controllable switch of a second circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A magnetic resonance imaging system comprising:
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a gradient amplifier disposed proximate to a magnet assembly of the magnetic resonance imaging system and comprising a plurality of controllable switches; a gate driver unit operatively coupled to the gradient amplifier and comprising a first power exchanging coil operatively coupled to a power source; a second power exchanging coil configured to receive power from the first power exchanging coil via a magnetic field; a field focusing element disposed between the first power exchanging coil and the second power exchanging coil and configured to focus the magnetic field onto the second power exchanging coil; enhance coupling between the first power exchanging coil and the second power exchanging coil; a first circuit coupled to the second power exchanging coil; and a gate drive subunit operatively coupled to the first circuit and configured to provide an output signal to a control terminal corresponding to the plurality of controllable switches. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of contactless power transfer in a magnetic resonance imaging system comprising:
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transferring power from a power source via a first power exchanging coil, a field focusing element, and a second power exchanging coil to a gate drive subunit; switching a controllable switch of a gradient amplifier based on an output signal provided to a control terminal of the controllable switch from the gate drive subunit; and transferring data between the gradient amplifier to a control subunit via the gate drive subunit, the second power exchanging coil, the field focusing element, and the first power exchanging coil. - View Dependent Claims (25, 26, 27, 28)
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Specification