A control device of an AC rotating electrical machine includes: a midpoint potential detection unit 12 that detects, for respective phases, midpoint potentials 43, 44, 45 of upper switching elements 41 and lower switching elements 42 of an inverter circuit 20; a phase current detection unit 23 that detects a phase current of each phase of an AC rotating electrical machine 3; and a CPU 11 that calculates a current estimated value Idc of DC current that is input from a DC power supply 2 to the inverter circuit 20, on the basis of the detected midpoint potential of each phase and the phase current of each phase.

A control device of an AC rotating electrical machine includes: a midpoint potential detection unit 12 that detects, for respective phases, midpoint potentials 43, 44, 45 of upper switching elements 41 and lower switching elements 42 of an inverter circuit 20; a phase current detection unit 23 that detects a phase current of each phase of an AC rotating electrical machine 3; and a CPU 11 that calculates a current estimated value Idc of DC current that is input from a DC power supply 2 to the inverter circuit 20, on the basis of the detected midpoint potential of each phase and the phase current of each phase.

A vehicle includes a controller configured to deactivate an inverter driving the rotor. The deactivation being responsive to respective speeds for a rotor derived from respective samples from each of a monitoring core and a current control core over a same temporal window being different by a threshold amount. The cores each generate a different number of the samples due to having different chronometric periods and the temporal window being greater than the chronometric periods.

A hardware-based detection system includes, among other things, a signal-generating circuit for generating a signal which is functionally related to current in a motor winding, a reference current, and a duration of time. The system may also include a comparator circuit for comparing the generated signal to a reference signal, and for thereby detecting an over-temperature condition in the motor winding. If desired, a compensating circuit may be used to generate a variable reference signal as a function of ambient temperature. A method of operating a detection system is also disclosed. If desired, the detection system may be completely implemented in hardware using an uncomplicated analog circuit architecture.

A hardware-based detection system includes, among other things, a signal-generating circuit for generating a signal which is functionally related to current in a motor winding, a reference current, and a duration of time. The system may also include a comparator circuit for comparing the generated signal to a reference signal, and for thereby detecting an over-temperature condition in the motor winding. If desired, a compensating circuit may be used to generate a variable reference signal as a function of ambient temperature. A method of operating a detection system is also disclosed. If desired, the detection system may be completely implemented in hardware using an uncomplicated analog circuit architecture.

A motor control system has a computing device and a motor controller. The computing device receives user demands through a GUI, and provides a preset speed table based on the user demands. The preset speed table has a plurality of fixed values of a duty cycle of a pulse width modulation signal and a plurality of preset values of a preset motor speed corresponding to the plurality of fixed values of the duty cycle of the pulse width modulation signal. The motor controller provides the pulse width modulation signal to drive a motor based on the preset speed table.

A rotation angle correction device corrects a rotation angle of a converter converting a signal from a resolver attached to a motor. An arrival time measurement unit measures an arrival time at which the rotation angle reaches a specified rotation angle from a reference angle in a current cycle. A reference time calculation unit calculates a reference time at which the rotation angle reaches the specified rotation angle from the reference angle assuming that the motor rotates in the current cycle at the same angular velocity as an angular velocity in a previous cycle. A difference calculation unit calculates a difference between the arrival time and the reference time. An error angle calculation unit multiplies the difference between the arrival time and the reference time and the angular velocity in the previous cycle to obtain an error angle. A correction unit corrects the rotation angle based on the error angle.

The phase error detection unit PHED detects the phase error PERR between the phase of the BEMF and the phase of the phase switching signal COMM (masking signal MSK) at each of a plurality of detection timings that become the zero crossing timings of the BEMF in the mechanical angular cycle. The PI compensator PICPa has a plurality of cycle setting registers REGN 0_0 to REGN 3_5 for each of a plurality of detection timings, and while switching the registers for each detection timing, the PI compensator determines the cycle setting value NCNTS for bringing the inputted phase error PERR close to zero by reflecting the previous cycle setting value NCNT stored in the register. The clock generation unit CGEN sequentially controls the phase switching signal COMM based on the cycle setting value NCNTS.

To provide a vehicle in which an increase or fluctuations in engine vibration or noise during external electric power supply can be suppressed. A vehicle includes an electric power generation device, a battery connected to the electric power generation device via a power line, an external electric power supply device that interconnects the power line and external equipment, and an ECU that controls charging and discharging of the electric power generation device and the battery. The ECU starts an engine and supplies electric power generated by a generator to the battery and the external equipment in a case where a SOC is equal to or less than a use lower limit SOC and supplies the external equipment with electric power from the battery in a case where the SOC exceeds a use upper limit SOC. In addition, the ECU executes fixed point control for controlling the engine and the generator.

To provide a vehicle in which an increase or fluctuations in engine vibration or noise during external electric power supply can be suppressed. A vehicle includes an electric power generation device, a battery connected to the electric power generation device via a power line, an external electric power supply device that interconnects the power line and external equipment, and an ECU that controls charging and discharging of the electric power generation device and the battery. The ECU starts an engine and supplies electric power generated by a generator to the battery and the external equipment in a case where a SOC is equal to or less than a use lower limit SOC and supplies the external equipment with electric power from the battery in a case where the SOC exceeds a use upper limit SOC. In addition, the ECU executes fixed point control for controlling the engine and the generator.