Transformer based variable voltage converter
AssigneeFord Global Technologies, LLC
InventorsBaoming GE, Lihua CHEN
Life of this patent
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Abstract
A vehicle electric drive includes a battery, an electric machine, and a variable voltage converter. The variable voltage converter includes switches, a transformer having a pair of windings sharing a common terminal with a series connected input capacitor, and an inductor electrically between the switches and transformer. The transformer and input capacitor are in parallel with the battery. The variable voltage converter is configured to boost voltage of the battery via operation of the switches.
Claims16
A vehicle electric drive comprising:
- a battery;
- an electric machine;
- and
- a variable voltage converter
- including switches, a transformer having a pair of windings sharing a common terminal with a series connected input capacitor, and an inductor electrically between the switches and transformer, the transformer and input capacitor being in parallel with the battery, and
- configured to boost voltage of the battery via operation of the switches.
A vehicle electric drive comprising:
- a battery;
- a motor and generator;
- and
- a variable voltage converter electrically between the battery and the motor and generator, and including a series connected transformer and capacitor in parallel with the battery such that operation of the variable voltage converter as internal resistance of the battery changes by an order of magnitude results in changes in peak-to-peak values of battery ripple current of less than 20%.
A method for operating a vehicle, comprising:
- operating a variable voltage converter that is electrically between a battery and an electric machine, and that includes a series connected transformer and capacitor in parallel with the battery such that an order of magnitude change in internal resistance of the battery results in changes in peak-to-peak values of battery ripple current of less than 20%.
Dependencies are inferred from the claim text.