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US 10,763,741 B2Granted
Method for reducing common mode current in power electronic equipment
AssigneeVacon Oy
InventorAndreas Doktar
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AssigneeVacon Oy
InventorAndreas Doktar
Estimating the term…
The present invention relates to a method for reducing common mode current in power electronic equipment comprising two or more active front end (AFE) components (1) coupled in parallel between an AC supply grid (2) and a DC-link (3). A duty cycle of pulse width modulation (PWM) for the AFE components (1) is determined, and an error signal is derived based on the determined duty cycle of PWM and on a common mode current of the AFE components (1). A correction voltage is derived, based on the error signal, and a DC voltage control signal is derived based on the derived correction voltage and a measured DC voltage of the DC-link (3) and/or a DC voltage reference. The power electronic equipment is controlled in accordance with the derived DC voltage control signal. The present invention also relates to a method for starting active front end (AFE) components (1) of power electronic equipment comprising two or more AFE components (1) coupled in parallel between an AC supply grid (2) and a DC-link (3).
A method for reducing common mode current in power electronic equipment comprising two or more active front end (AFE) components coupled in parallel between an AC supply grid and a DC-link, the method comprising the steps of:
A non-volatile computer readable medium encoded with a computer program for reducing common mode current in power electronic equipment comprising two or more active front end (AFE) components coupled in parallel between an AC supply grid and a DC-link, the computer program comprising computer executable instructions for controlling a programmable processor to:
Dependencies are inferred from the claim text.