Active Switching Frequency Modulation
AssigneeCaterpillar Inc.
InventorBrett Michael Nee
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Abstract
A method of controlling a variable frequency power converter disposed on a vehicle, and a machine with such a variable frequency power converter is disclosed. The method may comprise providing a power controller, the variable frequency power converter and an electrical energy storage repository disposed on the vehicle. The method may further comprise receiving, by the power controller, a desired reference value, and adjusting a switching frequency of the variable frequency power converter from a first switching frequency to a second switching frequency based on the desired reference value.
Claims20
A method of controlling a variable frequency power converter disposed on a vehicle, the method comprising:
- providing a power controller, the variable frequency power converter and an electrical energy storage repository disposed on the vehicle, the power controller coupled to the variable frequency power converter and the electrical energy storage repository;
- receiving, by the power controller, a desired power reference value;
- and
- adjusting a switching frequency of the variable frequency power converter from a first switching frequency to a second switching frequency based on the desired power reference value.
A method of controlling a variable frequency power converter disposed on a hybrid vehicle, the method comprising:
- providing a power controller, the variable frequency power converter and an electrical energy storage repository disposed on the hybrid vehicle, the power controller coupled to the variable frequency power converter and the electrical energy storage repository;
- obtaining, by the power controller, a desired current reference value;
- and
- adjusting a switching frequency of the variable frequency power converter from a first switching frequency to a second switching frequency based on the desired current reference value.
An electric drive machine, the machine comprising:
- an engine;
- a generator operatively coupled to the engine;
- a motor operatively coupled to one or more traction apparatus;
- an electrical energy storage repository;
- a closed loop variable frequency power converter coupled to the electrical energy storage repository, the variable frequency power converter including a switch moveable between a first and a second position;
- and
- a power controller coupled to the variable frequency power converter, the power controller configured to scale the switching frequency of the variable frequency power converter as a function of a desired reference value.
Dependencies are inferred from the claim text.