Patent ID: 6845022
Filing Date: 2005-01-18
Classification: H02M,H03K

Abstract:
1. A power conversion apparatus comprising: a power switching device; a voltage sensor which detects an output voltage of said switching device to output a first signal depending on the output voltage; a current sensor which detects an output current of said switching device to output a second signal depending on the output current; and a device controller connected to said switching device, said voltage sensor, and said current sensor; wherein said device controller includes: a driver connected to said switching device; and a correcter connected to said driver, said voltage sensor and said current sensor; said driver outputs a third drive signal to said switching device; and said correcter obtains the first signal from said voltage sensor, the second signal from said current sensor, and the third signal from said driver; calculates a switching loss by using a value of the first signal and a value of the second signal; compares a value of the switching loss with a first reference value, and the value of the first signal with a second reference value; and corrects the value of the third signal, when at least one of a condition in which the value of the switching loss exceeds the first reference value and a condition in which the value of the first signal exceeds the second reference value is satisfied, such that the exceeding value is not larger than the corresponding reference value.