Zero voltage crossover detector for polyphase systems

Details Zero voltage crossover detector for polyphase systems Zero voltage crossover detector for polyphase systems

G - Physics

01

R

324/67

G01R 19/175 (2006.01)

Patent

CA 2004340

ZERO VOLTAGE CROSSOVER DETECTOR FOR POLYPHASE SYSTEMS Abstract The invention finds application primarily in three phase power systems having A, B and C voltage phases. The invention includes a first voltage measurement device coupled between the A phase input and the B phase input, having a first measured voltage output. The invention further includes a second voltage measurement device coupled between the A phase input and the C phase input, having a second measured voltage output. The invention also includes a comparator having a first input connected to the first output of the first voltage measurement device and a second input connected to the second output of the second voltage measurement device, for generating a signal when the first measured voltage is equal to and opposite in polarity from the second measured voltage. This signal indicates that a zero crossover event has occurred with the A phase.

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