Abstract: A motor control apparatus has an inverter that applies a voltage to an AC induction motor to be driven, a command value calculator that calculates a command value of an AC voltage outputted from the inverter based on a target motor torque of the AC induction motor, and an inverter controller that controls the inverter based on the command value of the AC voltage. The target motor torque of the AC induction motor includes a first target motor torque and a second target motor torque. A high speed response is required in the first target motor torque in order to at least suppress torsional vibration. The second target motor torque is a lower speed response than the first target motor torque. Delay processing is carried out for the second target motor torque.

Abstract: A controller of electric vehicle includes: sensor sensing vehicle information; torque target value setter; torque command value calculator; first paragraph calculator implementing first filtering treatment of the torque command value, the first filtering treatment including transmission characteristic having hand pass filter characteristic; second paragraph calculator implementing second filtering treatment of motor revolution speed which is one of pieces of the vehicle information, the second filtering treatment including: the transmission characteristic having band pass filter characteristic, and model of a transmission characteristic between: torque input to the vehicle, and the motor revolution speed; torque target value calculator calculating the second torque target value. Based on the first torque target value and the second torque target value, the torque command value calculator calculates the torque command value.

Abstract: A controller of electric vehicle includes: sensor sensing vehicle information; torque target value setter; torque command value calculator; first paragraph calculator implementing first filtering treatment of the torque command value, the first filtering treatment including transmission characteristic having hand pass filter characteristic; second paragraph calculator implementing second filtering treatment of motor revolution speed which is one of pieces of the vehicle information, the second filtering treatment including: the transmission characteristic having band pass filter characteristic, and model of a transmission characteristic between: torque input to the vehicle, and the motor revolution speed; torque target value calculator calculating the second torque target value. Based on the first torque target value and the second torque target value, the torque command value calculator calculates the torque command value.

Abstract: Heating value P[W] generated at an IGBT is calculated, and a temperature difference ?T?j [° C.] between a temperature Tw [° C.] of cooling water circulating in a cooling system and a temperature Tj [° C.] of an IGBT is calculated based on thermal resistance R [° C./W] of the cooling system. A temperature rise ?Tj [° C.] with transient influences eliminated is then calculated based on the calculated temperature difference ?T?j [° C.], and the temperature Tj [° C.] (=Tw [° C.]+?Tj [° C.]) of the IGBT is calculated.

Abstract: Corresponding to a target torque, the control device calculates a target value of a feature based on at least one of the length of a long axis of a current vector locus and the length of the short axis and further superimposes a superimposed current on a drive current for the motor, the superimposed current having a frequency different from the frequency of the drive current. Further, the control device detects an actual value of the feature based on at least one of the length of a long axis of a current vector locus of the superimposed current and the length of the short axis of the same and finally detects a phase angle of the motor based on the target value and the actual value for the feature. The manipulation of a detecting phase is performed by feedback of a feature obtained by the magnitude of the superimposed current. That is, when the actual feature is more than the target value, the detecting phase is advanced.

Abstract: Heating value P[W] generated at an IGBT is calculated, and a temperature difference ?T?j [° C.] between a temperature Tw [° C.] of cooling water circulating in a cooling system and a temperature Tj [° C.] of an IGBT is calculated based on thermal resistance R [° C./W] of the cooling system. A temperature rise ?Tj [° C.] with transient influences eliminated is then calculated based on the calculated temperature difference ?T?j [° C.], and the temperature Tj [° C.] (=Tw [° C.]+?Tj [° C.]) of the IGBT is calculated.

Abstract: A control system of an electric motor powered by a battery comprises an inverter circuit that inverts a direct current fed from the battery to an alternating current fed to the electric motor; and an output controlling circuit that controls an output of the inverter circuit to adjust operation of the electric motor. The output controlling circuit includes a first section that detects a magnitude of output voltage of the battery; a second section that, based on the detected output voltage, derives an unloaded voltage that would be outputted from the battery when the battery is unloaded; a third section that, based on the unloaded voltage, looks up an appropriate current command from maps that store various current commands with respect to operation condition of the motor; and a fourth section that, based on the looked up current command, controls the output of the inverter circuit.

Abstract: In a vibration control apparatus for a vehicle driven by an electric motor at least, a first target torque is calculated from a vehicle operating condition such as an accelerator opening, and a second target torque is calculated from at least a sensed motor speed by using a model H(s)/Gp(s) composed of a transfer characteristic H(s) which is greater than or equal to a transfer characteristic Gp(s) in an order difference between the order of a denominator and the order of a numerator. A torque control section controls the motor to bring an actual output torque of the motor closer to a command motor torque determined from the first and second target torque.

Abstract: Corresponding to a target torque, the control device calculates a target value of a feature based on at least one of the length of a long axis of a current vector locus and the length of the short axis and further superimposes a superimposed current on a drive current for the motor, the superimposed current having a frequency different from the frequency of the drive current. Further, the control device detects an actual value of the feature based on at least one of the length of a long axis of a current vector locus of the superimposed current and the length of the short axis of the same and finally detects a phase angle of the motor based on the target value and the actual value for the feature. The manipulation of a detecting phase is performed by feedback of a feature obtained by the magnitude of the superimposed current. That is, when the actual feature is more than the target value, the detecting phase is advanced.

Abstract: A control system of an electric motor powered by a battery comprises an inverter circuit that inverts a direct current fed from the battery to an alternating current fed to the electric motor; and an output controlling circuit that controls an output of the inverter circuit to adjust operation of the electric motor. The output controlling circuit includes a first section that detects a magnitude of output voltage of the battery; a second section that, based on the detected output voltage, derives an unloaded voltage that would be outputted from the battery when the battery is unloaded; a third section that, based on the unloaded voltage, looks up an appropriate current command from maps that store various current commands with respect to operation condition of the motor; and a fourth section that, based on the looked up current command, controls the output of the inverter circuit.

Abstract: In a vibration control apparatus for a vehicle driven by an electric motor at least, a first target torque is calculated from a vehicle operating condition such as an accelerator opening, and a second target torque is calculated from at least a sensed motor speed by using a model H(s)/Gp(s) composed of a transfer characteristic H(s) which is greater than or equal to a transfer characteristic Gp(s) in an order difference between the order of a denominator and the order of a numerator. A torque control section controls the motor to bring an actual output torque of the motor closer to a command motor torque determined from the first and second target torque.