Patent ID: 7932685
Filing Date: 2011-04-26
Classification: B60L,H02M,H02P,Y02T

Abstract:
1. A control apparatus for a power conversion apparatus including a plurality of chopper circuits and a capacitor, each of said chopper circuits including a switching circuit and a coil, said switching circuit being applied with an input voltage and on/off-controlled in accordance with specific timings determined by a value and a sign of variation of a current flowing through said coil to create a required voltage in said capacitor through said coil, said control apparatus comprising: a first function of evenly dividing a first interval between adjacent two of said specific timings of a selected one of said chopper circuits to produce divided timings to be allocated to the other chopper circuits; and a second function of setting, for each of the other chopper circuits, an on-time period of said switching circuit such that, when said first interval varies by a first amount as a result of which said specific timing of each of the other chopper circuits deviates from a corresponding one of said divided timings, a second interval between adjacent two of said specific timings of each of said other chopper circuits is varied by a second amount, said second variation amount being larger than said first variation amount to reduce deviation between said specific timing of each of said other chopper circuits and said corresponding one of said divided timings.