JP2018182901A5 - - Google Patents

Claims (7)

A power conversion unit having a switching element and supplying a current to a load,
A sequence management unit that outputs a dead time length command that determines the length of a dead time that is a protection period for turning off the switching element, and the dead time added based on the dead time length command. A control unit having a dead time adding unit that outputs a switching command for turning on and off the switching element, and
The sequence management unit is configured to switch the current value or the switching command supplied from the power conversion unit to the load when the switching element is turned on and off by the switching command based on the length command of the dead time. A power converter for obtaining a compensation amount for compensating the voltage command value based on a voltage command value to be generated. 2. The power converter according to claim 1, wherein the sequence management unit outputs n types (where n is a natural number of 2 or more) of dead time length commands. 3. The power converter according to claim 1, wherein the voltage command value is a voltage command value based on the current value. The sequence management unit outputs n types of dead time length commands, and uses the n types of voltage command values obtained in response to the n types of dead time length commands, for the n types of dead time length commands. 4. The power converter according to claim 1, wherein slopes of the n types of voltage command values are determined, and a compensation amount for compensating the voltage command values is determined based on the slopes. 5. apparatus. The sequence management unit uses the dead time length command, the voltage command value obtained based on the dead time length command, and a DC link voltage to be input to the power conversion unit. The power converter according to any one of claims 2 to 4, wherein a compensation amount for compensating the voltage command value is obtained. The sequence management unit outputs the time-varying dead time length command, and performs the on / off operation of the switching element based on the time-varying dead time length command, from the power conversion unit to the load. The power converter according to claim 1, wherein a compensation amount for compensating the voltage command value is obtained using the current value supplied to the power conversion device. 7. The controller according to claim 1, wherein the controller includes a dead time compensator that compensates the voltage command value by adding a compensation voltage having a polarity opposite to the voltage command value to the voltage command value based on the compensation amount. 8. The power converter according to claim 1.