Multi-phase power amplifier
AssigneeDynamic Solutions, Inc.
InventorR. Wayne Pauly
Life of this patent
Estimating the term…
Abstract
Various examples of systems for powering a linear motor with a multi-phase amplifier are described herein. In some embodiments, an apparatus includes a plurality of current sources for supplying power to an electronic device. The plurality of current sources are configured to supply a substantially constant direct current to a load, and each of the plurality of current sources is configured to supply a periodic alternating current that is out of phase relative to the periodic alternating current of one or more of the other current sources. A sum of the periodic alternating currents from the plurality of current sources is configured to provide the substantially constant direct current. Embodiments of the systems can be used in vibration testing equipment such as electro-dynamic shakers.
Claims20
An apparatus for vibration testing, comprising:
- a plurality of current sources configured to output a substantially constant direct current, each current source of the plurality of current sources comprising a half-bridge switch configured to operate based on a pulse-width modulated signal and an inductor electrically connected to an output of the half-bridge switch, each current source of the plurality of current sources configured to individually supply a periodic alternating current waveform that is out of phase relative to the periodic alternating current waveforms of the other current sources of the plurality of current sources, a sum of the periodic alternating current waveforms from the plurality of current sources providing the substantially constant direct current;
- and
- an electro-dynamic shaker configured to electrically connect to the plurality of current sources and receive the substantially constant direct current to power operation of the electro-dynamic shaker,
- wherein the plurality of current sources comprise more than two current sources and an even number of total current sources.
An apparatus for supplying power to an electronic device, comprising a plurality of current sources configured to supply a substantially constant direct current to a load, each current source of the plurality of current sources configured to supply a periodic alternating current that is out of phase relative to the periodic alternating current of at least one other current source of the plurality of current sources, a sum of the periodic alternating currents supplied by the plurality of current sources providing the substantially constant direct current.
A method for powering equipment used in vibration testing, the method comprising:
- controlling a plurality of half-bridge switches using pulse-width modulated signals so that each half-bridge switch generates a periodic alternating current waveform in at least one inductor that is out of phase relative to the periodic alternating current waveform generated in at least one other inductor by another half-bridge switch of the plurality of half-bridge switches;
- and
- summing the periodic alternating current waveforms of the plurality of half-bridge switches to output a substantially constant direct current.
Dependencies are inferred from the claim text.