Patent ID: 8102687
Filing Date: 2012-01-24
Classification: B60L,H02M,H02P,H03K,Y02T

Abstract:
1. A control apparatus for controlling a power conversion apparatus including at least one voltage-controlled type switching element provided with a drive circuit, and a coil connected to said switching element, said control apparatus operating to adjust an absolute value of a current chopped by repeating on/off operation of said switching element and flowing through said coil in order to convert an input voltage of said power conversion apparatus to a required output voltage, said control apparatus comprising a configuration to perform: a first function of outputting an operation command signal to said drive circuit of said switching element to control an output voltage of said power conversion apparatus, said operation command signal indicating one of on-state and off-state of said switching element; a second function of setting, on the basis of a current value of a current flowing through said switching element, a switching speed of said switching element to such a value that noise exceeding a withstand voltage between a conduction control terminal and an output terminal of said switching element can be prevented from occurring when said switching element is switched between on-state and off-state by said drive circuit; and a third function of adjusting said drive circuit to drive said switching element such that said switching element is switched between on-state and off-state at said switching speed set by said second function, wherein said second function reduces said switching speed when said current value is larger than a redetermined threshold; and wherein said switching element is turned on when said current value is decreased to a predetermined value, and said second function determines said switching speed on the basis of said current value at a time when said switching element is switched from on-state to off-state.