Patent ID: 9285410
Filing Date: 2016-03-15
CPC Classification: G01R,H02P

Claim Text:
1. A control circuit for determining a phase sequence of an n-phase alternating-current generator (having n phases and where n is an integer satisfying n≧2), the phase sequence relating to an order of output voltages respectively outputted from the phases, the control circuit comprising: a determination unit configured to determine the phase sequence of the n-phase alternating-current generator by detecting timing at which an output voltage outputted from each of the n phases either exceeds or falls below a predetermined threshold value and a cycle obtaining unit configured to obtain a cycle of the output voltages respectively outputted from the phases of the n-phase alternating-current generator, wherein assuming that time resulting from division of the cycle obtained by the cycle obtaining unit by the n is specific time, the determination unit performs a phase determination procedure for obtaining one phase, out of the n phases, in which the output voltage has become no lower than the predetermined threshold voltage during a period from a time point that is x times of the specific time before predetermined reference timing (where x is an integer satisfying 0≦x≦n−1 to a time point that is (x+1) times of the specific time before the reference timing.