High frequency inductor filter apparatus and method of use thereof
AssigneeCTM Magnetics, Inc.
InventorGrant A. MacLennan
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Abstract
The invention comprises a high frequency inductor filter apparatus coupled with an inverter yielding high frequency harmonics and/or non-sixty Hertz output. For example, an inductor/converter apparatus is provided using a silicon carbide transistor that outputs power having a carrier frequency, modulated by a fundamental frequency, and a set of harmonic frequencies. A filter, comprising an inductor having a distributed gap core material and optional magnet wires, receives power output from the inverter/converter and processes the power by passing the fundamental frequency while reducing amplitude of the harmonic frequencies.
Claims20
An apparatus configured to process electrical power, comprising:
- an inverter/converter system configured to output:
- (1) a carrier frequency, said carrier frequency modulated by a fundamental frequency, and (2) a set of harmonic frequencies of the fundamental frequency, said inverter/converter system comprising:
- a voltage control switch, said voltage control switch comprising a silicon carbide insulated gate bipolar transistor;
- and
- a downstream-circuit electrical power filter comprising an inductor and a capacitor configured to:
- substantially remove the carrier frequency;
- pass the fundamental frequency;
- and
- reduce amplitude of a largest amplitude harmonic frequency of said set of harmonic frequencies by at least ninety percent,
- wherein said inductor comprises an inductor core, and
- wherein said inductor core comprises a distributed gap core material.
A method for processing electrical power, comprising the steps of:
- processing power with an inverter/converter system,
- said inverter/converter system outputting output power comprising:
- (1) a carrier frequency, said carrier frequency modulated by a fundamental frequency, and (2) a set of harmonic frequencies of the fundamental frequency, said inverter/converter system comprising:
- a voltage control switch, said voltage control switch comprising a silicon carbide insulated gate bipolar transistor;
- and
- filtering the output power using a downstream-circuit electrical power filter comprising an inductor and a capacitor configured to:
- substantially remove the carrier frequency;
- pass the fundamental frequency;
- and
- reduce amplitude of a largest amplitude harmonic frequency of said set of harmonic frequencies by at least ninety percent,
- wherein said inductor comprises an inductor core, and
- wherein said inductor core comprises a distributed gap core material.
An apparatus configured to process electrical power, comprising:
- a high frequency switching device configured to provide:
- (1) a carrier frequency of at least 10 kHz modulated by a fundamental frequency and (2) a set of harmonic frequencies of the fundamental frequency, said high frequency switching device comprising:
- a silicon carbide insulated gate bipolar transistor;
- and
- an electrical power filter configured to receive output of said high frequency switching device, said electrical power filter comprising:
- an inductor, said inductor comprising an inductor core, said inductor core comprising a distributed gap material.
Dependencies are inferred from the claim text.