Rotating electrical machine control device

A rotating electrical machine control device that controls drive of a rotating electrical machine having multiphase open-end windings through a first inverter and a second inverter, the multiphase open-end windings being independent of each other, wherein

• the first inverter is connected to a one-end side of each of the multiphase open-end windings to convert electric power between direct current and multiphase alternating current,
• the second inverter is connected to an other-end side of each of the multiphase open-end windings to convert electric power between direct current and multiphase alternating current,
• in the first inverter and the second inverter, an arm for each alternating-current phase includes a series circuit of an upper-stage-side switching element and a lower-stage-side switching element,
• the rotating electrical machine control device has, as control schemes for the first inverter and the second inverter, at least two control schemes among pulse width modulation control that outputs a plurality of pulses with different patterns in a single electrical angle cycle, active short-circuit control that brings the upper-stage-side switching elements of the arms for all of a plurality of phases into an on state or brings the lower-stage-side switching elements of the arms for all of a plurality of phases into an on state, and rectangular-wave control that outputs a single pulse in a single electrical angle cycle,
• the first inverter and the second inverter can be controlled by the control schemes that are independent of each other,
• one of the plurality of control schemes is a first control scheme and one of the plurality of control schemes different than the first control scheme is a second control scheme, and
• the rotating electrical machine control device has a plurality of control modes in which the first inverter is controlled by the first control scheme and the second inverter is controlled by the second control scheme,
• wherein the plurality of control modes comprise a first control mode, a second control mode, a third control mode and a fourth control mode,
• where under the first control mode the first control scheme is the pulse modulation control and the second control scheme is the active short-circuit control, under the second control mode the first control scheme is the pulse modulation control and the second control scheme is the pulse modulation control, under the third control mode the first control scheme is the rectangular-wave control and the second control scheme is the pulse modulation control, under the fourth control mode the first control scheme is the rectangular-wave control and the second control scheme is the rectangular-wave control.