Suppression of charge pump voltage during switching in a matrix converter
AssigneeGM Global Technology Operations LLC
InventorsLATEEF A. KAJOUKE, TED D. PETERSON, RAY M. RANSOM
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Abstract
Switches of a matrix converter are protected from potentially damaging charge-pump voltage build-up during a transition (dead) time by pulsing On (temporarily closing) any “at risk” switch during the transition (dead) time. The temporary closing of the “at risk” switch discharges any voltage build-up across a parallel coupled capacitor, which protects the at risk switch from damage or failure.
Claims20
In a matrix converter having a plurality of switches and operating in a free-wheeling mode and a power delivery mode, a method for protecting the switches during a transition period between the free-wheeling mode and the power delivery mode comprising, temporarily closing a particular switch of the plurality of switches that is normally open during the transition period thereby protecting the particular switch during the transition period.
In a matrix converter having a plurality of switches and operating in a free-wheeling mode and a power delivery mode, a method for protecting the switches during a transition period between the free-wheeling mode and the power delivery mode comprising:
- determining a particular switch of the plurality of switches being at risk of a charge pump voltage accumulation across the particular switch during the transition period;
- and
- temporarily closing the particular switch during the transition period thereby protecting the particular switch from the charge pump voltage accumulation during the transition period.
A matrix converter having a plurality of switches and configured to operate in a free-wheeling mode and a power delivery mode;
- comprising:
- a battery;
- a conversion module coupled to the battery;
- an isolation module coupled to the conversion module;
- a switch matrix coupled to the isolation module, the switch matrix having a plurality of switches;
- and
- a controller coupled to the conversion module and the switch matrix, the controller configured to control the switch matrix to operate between a free-wheeling mode and a power delivery mode and configured to protect a particular switch normally open during a transition period between the free-wheeling mode and the power delivery mode by temporarily closing the particular switch during the transition period.
Dependencies are inferred from the claim text.