Patent ID: 7948779

Claim:
A converter comprising a rectifier, an intermediate circuit connected to the rectifier, an inverter connected to the intermediate circuit, power semiconductor switches forming a part of the inverter, a drive circuit connected to the power semiconductor switches for modulating the power semiconductor switches, said drive circuit generating modulation products in a first frequency band, in a second frequency band and in an intermediate frequency band located between the first frequency band and the second frequency band, wherein the modulation products in the intermediate frequency band being of lesser magnitude compared to the modulation products in the first frequency band and in the second frequency band, and a filter forming a part of the inverter and connected between the power semiconductor switches and an electromotive drive, with the filter defining a resonance range, a passband for a fundamental frequency generated by the drive circuit, and an attenuation range, wherein the resonance range is located in a range of the intermediate frequency band.