Conversion of single phase to multiple phase alternating current
First Claim
1. A method for converting single phase alternating current to multiple phase alternating current for simultaneously powering multiple vehicle systems comprising the steps of:
- (a) producing single phase alternating current from a direct current source with pulse width modulation;
(b) splitting the single phase alternating current into a plurality of separate paths including at least a first path, a second path, and a third path;
(c) shifting the phase of the alternating current on the second path to be different than the phase of the first path and shifting the phase of the alternating current on the third path to be different than the phase of the first or second paths to create three-phase alternating current power; and
(d) operating vehicle systems with the three-phase alternating current power.
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Accused Products
Abstract
A system for controlling multiple vehicle includes a twelve volt (12V)/forty-two volt (42V) battery power distribution system that provides direct current. The system converts single phase alternating current to multiple phase alternating current to simultaneously power multiple vehicle systems. A single pulse width modulation generator converts the direct current from the 12V/42V battery power distribution system to alternating current. This provides one power supply path of alternating current, which has a first phase. A splitter device splits the one power supply path of alternating current into three power paths. A lead/lag circuit is used to shift the alternating current of the second path to a second phase different than the first phase of the first power supply path. A second lead/lag circuit for shifts the alternating current of the third path to a third phase different than the first phase or the second phase. This creates a three-phase alternating current power from a single direct current source. The three-phase alternating current is used to power a plurality of induction motors that operate multiple vehicle systems.
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Citations
21 Claims
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1. A method for converting single phase alternating current to multiple phase alternating current for simultaneously powering multiple vehicle systems comprising the steps of:
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(a) producing single phase alternating current from a direct current source with pulse width modulation;
(b) splitting the single phase alternating current into a plurality of separate paths including at least a first path, a second path, and a third path;
(c) shifting the phase of the alternating current on the second path to be different than the phase of the first path and shifting the phase of the alternating current on the third path to be different than the phase of the first or second paths to create three-phase alternating current power; and
(d) operating vehicle systems with the three-phase alternating current power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 21)
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10. A system for converting single phase alternating current to multiple phase alternating current to simultaneously power multiple vehicle systems comprising:
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a direct current source;
a single pulse width modulation generator for converting direct current to alternating current to provide one power supply path of alternating current having a first phase;
a splitter for splitting said one power supply path of alternating current into a plurality of power supply paths including at least a first power supply path, a second power supply path, and a third power supply path;
at least one lead/lag circuit for shifting the alternating current of said second path to a second phase different than said first phase of said first power supply path;
at least one lead/lag circuit for shifting the alternating current of said third path to a third phase different than said first phase or said second phase; and
a plurality of induction motors for operating multiple vehicle systems via a three-phase alternating current power comprised of said first, second, and third paths. - View Dependent Claims (11, 12, 13, 18, 19, 20)
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Specification