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US 2015/0306962 A1Published application
Duty cycle updates for a power converter
AssigneeGM Global Technology Operations LLC
InventorRAY M. RANSOM
Life of this patent
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Abstract
A method and system are provided for updating a duty cycle for a power converter. The system and method operate the power converter to compute a first duty cycle during a first pulse-width modulation period and updating a second duty cycle for a second pulse-width modulation period at the completion of the first pulse-width modulation period. Next a third duty cycle for a third pervious pulse-width modulation period is updated at the completion of the first pulse-width modulation period.
Claims20
A method, comprising:
- computing a first duty cycle during a first pulse-width modulation period;
- updating a second duty cycle for a second pulse-width modulation period at the completion of the first pulse-width modulation period, the second pulse-width modulation period being just prior to the first pulse-width modulation period;
- and
- updating a third duty cycle for a third pervious pulse-width modulation period at the completion of the first pulse-width modulation period, the third pulse-width modulation period being two periods prior to the first pulse-width modulation period.
1 more element
A system, comprising:
- an energy source;
- a power converter coupled to the energy source for converting energy from the energy source into multi-phase power signals;
- a pulse-width modulator coupled to the power converter and providing pulse-width modulation control signals to the power converter;
- and
- a controller coupled to the pulse-width modulator and providing duty cycle information for each of the multi-phase power signals;
- wherein, first duty cycle information is computed during a first pulse-width modulation period;
- wherein the controller updates second duty cycle information for a second pulse-width modulation period at the completion of the first pulse-width modulation period, the second pulse-width modulation period being just prior to the first pulse-width modulation period;
- and
- wherein the controller updates third duty cycle information for a third pervious pulse-width modulation period at the completion of the first pulse-width modulation period, the third pulse-width modulation period being two periods prior to the first pulse-width modulation period.
6 more elements
A vehicle, comprising:
- an energy source;
- a power converter coupled to the energy source for converting energy from the energy source into multi-phase power signals;
- a multi-phase motor coupled to the power converter and using the multi-phase power signals to propel the vehicle;
- a pulse-width modulator coupled to the power converter and providing pulse-width modulation control signals to the power converter;
- and
- a controller coupled to the pulse-width modulator and providing duty cycle information for each of the multi-phase power signals;
- wherein, first duty cycle information is computed during a first pulse-width modulation period;
- wherein the controller updates second duty cycle information for a second pulse-width modulation period at the completion of the first pulse-width modulation period, the second pulse-width modulation period being just prior to the first pulse-width modulation period;
- and
- wherein the controller updates third duty cycle information for a third pervious pulse-width modulation period at the completion of the first pulse-width modulation period, the third pulse-width modulation period being two periods prior to the first pulse-width modulation period.
7 more elements
Dependencies are inferred from the claim text.