| 摘要 |
PROBLEM TO BE SOLVED: To provide a controller of power converter for reducing the loss of power generated in a power semiconductor element, which is used in a controller of power converter for converting a DC power into an AC power, or an AC power into a DC power. SOLUTION: The drive signal for IGBT of a power converter, which is formed using a power semiconductor element such as the IGBT, is given from a PWM controller 15 for pulse-width modulation of the reference voltage. A DC offset voltage Vd is generated, depending on an output frequency f and an output phase θ with an DC offset generator 21 and this voltage Vd and reference voltage are added in adders 22 to 24 and is then given to a PWM controller 15 to generate an IGBT drive signal. Accordingly, loss of the power semiconductor element can be reduced. |
