Inverter with switch control and a method of controlling an inverter

A control device for an inverter that feeds an electric machine, wherein the control device comprises:

• a computer;
• and
• a computer program comprising commands which, when executed by the computer, cause the control unit to:
• provide pulse-width-modulated switching signals at a carrier frequency to drive switching elements of the inverter, and
• ascertain the carrier frequency within at least one operating range depending on a piece of operating point information that describes an operating point defined by a rotation speed and a torque of the electric machine in such a way that the carrier frequency is reduced within the at least one operating range compared to a maximum carrier frequency operating point at which a maximum carrier frequency is specified in the operating range,
• wherein an operating range has a full-load operating point, at which a maximum torque that is specified in terms of absolute value for its rotation speed is present, as the maximum carrier frequency operating point and extends into partial-load operation, and
• wherein the control device is configured to reduce the carrier frequency as the distance from the maximum carrier frequency operating point increases.