Abstract: Techniques and circuits for controlling a multi-phase electric motor and measuring current through the multi-phase electric motor without using a shunt resistor are described herein. A method may comprise controlling power switches of an inverter circuit to deliver a first phase current, a second phase current, and a third phase current to a multi-phase electric motor, and determining at least one of the first phase current, the second phase current, and the third phase current based on a first voltage drop over one of the power switches in a conducting mode and based on a temperature measurement, wherein the temperature measurement is based on a second voltage drop over a body diode of one of the power switches in a nonconducting mode during a dead time.

Abstract: In some examples, a method comprises controlling power switches to deliver a current to an electric motor, wherein the power switches are arranged in a bridge (e.g., an H-bridge or an h-bridge) comprising a first high-side power switch, a first low-side power switch, and a second low-side power switch. Controlling the power switches to deliver the current to the electric motor may include controlling the first high-side power switch ON and controlling the second low-side power switch ON, wherein the current to the electric motor flows through the high-side power switch and through the second low-side power switch. The method may comprise determining the current to the electric motor based on a voltage drop over one of the power switches arranged in the bridge. One or more aspects of the method may be performed during dead time.

Abstract: Techniques and circuits for controlling a multi-phase electric motor and measuring current through the multi-phase electric motor without using a shunt resistor are described herein. A method may comprise controlling power switches of an inverter circuit to deliver a first phase current, a second phase current, and a third phase current to a multi-phase electric motor, and determining at least one of the first phase current, the second phase current, and the third phase current based on a first voltage drop over one of the power switches in a conducting mode and based on a temperature measurement, wherein the temperature measurement is based on a second voltage drop over a body diode of one of the power switches in a nonconducting mode during a dead time.

Abstract: In some examples, this disclosure describes a method that comprises controlling power switches to deliver a current to an electric motor, wherein the power switches are arranged in a bridge (e.g., an H-bridge or an h-bridge) comprising a first high-side power switch, a first low-side power switch, and a second low-side power switch. Controlling the power switches to deliver the current to the electric motor may include controlling the first high-side power switch ON and controlling the second low-side power switch ON, wherein the current to the electric motor flows through the high-side power switch and through the second low-side power switch. The method may comprise determining the current to the electric motor based on a voltage drop over one of the power switches arranged in the bridge.