Drive controller for electric motor

A drive controller for use in an electric motor that includes a first winding set and a second winding set, the drive controller comprising:

• a first system that controls and drives the first winding set, the first system including a first control circuit, a first inverter, a first power supply connector, and a first ground connector;
• and
• a second system that controls and drives the second winding set, the second system including a second control circuit, a second inverter, a second power supply connector, and a second ground connector,
• wherein the first control circuit and the second control circuit are connected to an internal common ground,
• a first rectifying element that passes a current from the common ground to the first ground connector is provided in a line that connects the first ground connector and the common ground,
• a second rectifying element that passes a current from the common ground to the second ground connector is provided in a line that connects the second ground connector and the common ground,
• a first current detection element is provided in a line that connects a positive power supply and a line between the first rectifying element and the first ground connector , and
• a second current detection element is provided in a line that connects a positive power supply and a line between the second rectifying element and the second ground connector.