Control apparatus for semiconductor switches of an inverter, and method for driving an inverter

摘要

A control apparatus for driving a semiconductor switch of an inverter. A drive circuit generates a driver signal on the basis of a switching signal generated by a control regulation system of the inverter. A driver circuit which is coupled between the drive circuit and a control input of the semiconductor switch is configured to receive the driver signal and to generate, on the basis of the driver signal, a control signal which drives the semiconductor switch. The control signal is fed into the control input of the semiconductor switch. A regulation circuit is coupled to the drive circuit and is configured to detect a voltage signal dependent on the voltage across the semiconductor switch, to generate a regulation signal which is dependent on the voltage signal and is intended to regulate the driver signal, and to feed the regulation signal into the drive circuit.

主权项

1. A control apparatus for driving a semiconductor switch of an inverter, the apparatus comprising:
a drive circuit which is configured to generate a driver signal on the basis of a switching signal generated by a control regulation system of the inverter; a driver circuit which is coupled between the drive circuit and a control input of the semiconductor switch and is configured to
receive the driver signal and to generate, on the basis of the driver signal, a control signal which drives the semiconductor switch, andfeed said control signal into the control input of the semiconductor switch; and a regulation circuit which is coupled to the drive circuit and is configured to
detect, at a collector connection of the semiconductor switch or at a bridge branch of the inverter, a voltage signal dependent on a voltage across the semiconductor switch during switching-off of the semiconductor switch,integrate the voltage signal during switching-off of the semiconductor switch, to determine a maximum current intensity, on the integrated voltage signal, through the semiconductor switch,generate, based on the difference between the maximum current intensity determined and a predetermined value for the maximum current intensity, a regulation signal to regulate the driver signal,feed the regulation signal into the drive circuit.