Abstract: An estimation unit estimates a q-axis induced-voltage estimation value and estimation torque of a PM motor. An adder adds a torque command and a first command together. The first command is calculated at a first command generation unit based on the estimation torque. A further adder adds a q-axis voltage command and a second command together. The second command is calculated at a second command generation unit based on the q-axis induced-voltage estimation value. The first and second command generation units compensate a control delay in a current control system including a current control unit and an estimation delay in the estimation unit for the estimation torque and an estimation induced voltage of the PM motor, and thereby a lack of the q-axis voltage command in a high frequency range is compensated, reducing a torque ripple effectively over a wide range of speed up to a high speed range.

Abstract: A power converter fixes, in one cycle of an alternating-current voltage output command, a gate pulse signal to always output a direct-current input positive side terminal voltage value of an inverter circuit in a period X1 centering on a phase angle ?1 for higher potential, fixes a gate pulse signal to always output a direct-current input negative side terminal voltage value of the inverter circuit in a period X2 centering on a phase angle ?2 for lower potential, and outputs a gate pulse signal in which a ratio of a period Y1, which is obtained by excluding the periods X1 and X2 from a period between the phase angle ?1 and the phase angle ?2, and the first period X1, and a ratio of a period Y2, which is obtained by excluding the periods X1 and X2 from a period between the phase angle ?2 and a phase angle ?1+360 [deg].

Abstract: An object is to provide a magnetic-pole position detection apparatus for synchronous machines that allows a desired accuracy of magnetic-pole position detection regardless of variation in DC voltage of a DC voltage source. Calculation means (2a) changes a pulse width (tp) and a pulse-quiescent width (tn) in accordance with a DC voltage detection value (Vdc), using a pulse width determination section (22a), such that a desired accuracy of magnetic-pole position detection can be obtained regardless of variation in DC voltage of a DC voltage source (5). The calculation means (2a) also performs control such that a sampling timing is fixed at the end point of the pulse width (tp) of voltage vectors regardless of the DC voltage detection value (Vdc).

Abstract: In a vehicle control apparatus, a system controller that overall controls an engine controller and a converter controller is provided. The system controller drives, through the converter controller, a generator with a generator-rotational-speed command value ?c_ref1 smaller than idling maintenance minimum rotational speed ?e_idol_min of an engine, starts, through the engine controller, fuel injection to the engine after elapse of a predetermined time, and, when the rotational speed of the engine reaches a predetermined rotational speed threshold ?e_th that is larger than the generator-rotational-speed command value ?e_ref and smaller than the idling maintenance minimum rotational speed ?e_idol_min, outputs, to a converter, a gate cutoff signal GSTOP for turning off energization to the generator.

Abstract: A power conversion device formed of a converter for rectifying a single-phase AC voltage to a DC voltage and an inverter for driving an AC motor by converting the DC voltage to an AC voltage includes: a first compensation unit that uses a frequency component twice the frequency of the single-phase AC voltage with respect to the DC voltage outputted from the converter or a current outputted from the inverter as a compensation value for at least one of a torque command value, a current command value, a voltage command value, a frequency command value, and a phase angle command value; and a second compensation unit that uses the DC voltage outputted from the converter or a current outputted from the inverter after being subjected to low frequency cut-off processing and gain processing.

Abstract: A hybrid-vehicle power generator control apparatus. Based on a difference electric power value, which corresponds to the difference between an electric power generator power command value given by a higher-hierarchy control unit and an output voltage value of an electric power generator, an electric power generator control unit calculates an electric power generator rotation speed command value and based on the calculated electric power generator rotation speed command value, the electric power generator control unit PWM-controls an output of the electric-power conversion system that performs electric conversion between the electric power generator and a battery, so that the rotation speed of the electric power generator is made to keep track of the electric power generator rotation speed command value and the output electric power value of the electric power generator is made to keep track of the electric power generator power command value.

Abstract: A high-order control unit provided in a control device for a hybrid vehicle includes an elevation MAP that is used in common for up and down lines and in which at least two predetermined elevation values on a running track are described, and an energy estimation unit that estimates a target charge/discharge amount SOC_ref with respect to a power storage device on the basis of a traveling direction signal Rev expressing a traveling direction of a vehicle, distance information Dis from a distance translation unit, and information on the elevation MAP, to control a power generation device on the basis of the target charge/discharge amount SOC_ref.

Abstract: A control section for controlling a 3-level power conversion circuit. The control section calculates ON voltage error based on time ratios of three potentials in a predetermined certain period and a current value from a current detection section for detecting current outputted from the 3-level power conversion circuit, corrects a voltage command value based on a voltage correction amount for correcting the ON voltage error, and performs ON/OFF control for semiconductor switching elements of the 3-level power conversion circuit based on the corrected voltage command value.

Abstract: A propulsion control device of a hybrid vehicle that enables, during an operating state of a train, flexible control corresponding to the operating state includes a total control section that totally controls a power generating device, a power storage device, and a load device. The total control section monitors total generated power in all converters in a train formation and controls, on the basis of the total generated power and a fuel consumption characteristic of engines, speed we of the engines and generated power of the converters to further reduce a total fuel consumption in the formation.

Abstract: First to sixth switching elements forming a power conversion circuit for one phase in a three-level power converting apparatus include transistor elements and diode elements connected in reverse parallel to the transistor elements. Second, third, fifth, and sixth transistor elements are configured by MOSFETs that enable an electric current to flow in two directions.

Abstract: A resistance calculation activator determines whether or not an electric car is stopped on the basis of a drive command signal and an external signal, and activates a resistance calculator if a powering command is input as the drive command when it is determined that the electric car is stopped. The activated resistance calculator computes, within a resistance calculation period, a resistance value of an AC motor that produces driving force for the electric car, on the basis of a d-axis voltage command value and a d-axis current value supplied to the AC motor.

Abstract: A power-generation control unit controls the amount of power a generator can generate, when it is connected to an engine, by controlling a converter that converts AC power output by the generator to DC power. The power-generation control unit calculates a rotational-speed command value ?c_ref1 for the generator on the basis of a differential voltage value ?Vdc between a DC-voltage command value Vdc_ref for a power storage device and a DC voltage Vdc of a DC link portion; and executes a PWM control on an output of the converter on the basis of this rotational-speed command value ?c_ref1 such that the rotational speed ?c of the generator follows the rotational-speed command value ?c_ref1 and also such that the DC voltage Vdc follows the DC-voltage command value Vdc_ref so as to prevent overvoltage.

Abstract: The present invention relates to a parallel electricity-storage system that includes: a plurality of DC buses; a number of sets of battery banks formed by serially connecting one or a plurality of battery cells capable of charging and discharging, the number thereof being larger than number of the DC buses; a switch provided for each of the battery banks and serially connected to the battery bank to switch connection between the battery bank and each of the DC buses; charge/discharge circuits as many as the number of the DC buses that charge the respective battery banks via the DC buses or supply discharged power from the respective battery banks received via the DC buses to a load device; a voltage detector that detects a voltage of the respective battery banks; and a controller that controls the switch based on at least a voltage detected by the voltage detector.

Abstract: In a host controller included in a vehicle control apparatus, a generator-torque-command generating unit monitors an abnormal operation of the engine on the basis of an engine power generation command and a detection signal of a rotating speed detector, switches, when the abnormal operation of the engine is detected, a generator torque command to the lowest value of a torque command value for abnormal time set in advance as the generator torque command, thereafter, gradually increases the generator torque command, and, after recording, as a torque limit value, the magnitude of the generator torque command (a torque command value for abnormal time 3) at the time when the abnormal operation of the engine is detected again, switches the generator torque command to a torque command value for abnormal time (a torque command value for abnormal time 2) having a value smaller than the torque limit value.

Abstract: In a vehicle control apparatus, a system controller that overall controls an engine controller and a converter controller is provided. The system controller drives, through the converter controller, a generator with a generator-rotational-speed command value ?c_ref1 smaller than idling maintenance minimum rotational speed ?e_idol_min of an engine, starts, through the engine controller, fuel injection to the engine after elapse of a predetermined time, and, when the rotational speed of the engine reaches a predetermined rotational speed threshold ?e_th that is larger than the generator-rotational-speed command value ?e_ref and smaller than the idling maintenance minimum rotational speed ?e_idol_min, outputs, to a converter, a gate cutoff signal GSTOP for turning off energization to the generator.

Abstract: A hybrid-vehicle power generator control apparatus includes an integrated control unit that issues a driving command and a control command to an engine control unit and an electric-power conversion system control unit, respectively, based on requested electric power requested by a load apparatus, and a limiter that limits the control command from the integrated control unit such that when rotation frequency of an electric power generator is same as or lower than a predetermined value, the value of torque generated by the electric power generator becomes smaller than the value of torque generated by an engine. A limitation of the control command by the limiter prevents torques of the engine and the electric power generator from stepping out of the stable operating points.

Abstract: A control apparatus for an AC rotary machine includes a control circuit, a power converter, a current detector, and a voltage detector. The control circuit includes: an activation current instruction unit which generates a current instruction for activation; and a start phase setting unit which sets an initial rotation phase for activation control, based on the rotation direction of the AC rotary machine just after activation and on the polarity of current detected by the current detector just after activation. Thus, the current amplitude and torque shock just after activation control is started can be reduced, and assured and stable reactivation is allowed without causing the protection operation.

Abstract: A control apparatus for an AC rotary machine includes: a current detection section detecting current from a power converter to the AC rotary machine; and a control section generating a three-phase AC voltage instruction to the power converter, based on current detected by the current detection section and a torque instruction. The control section includes: an observer calculating a magnetic flux estimated value of the AC rotary machine, based on detected current and the voltage instruction; a current instruction calculation unit calculating current instruction values on rotational two axes, based on the torque instruction and the magnetic flux estimated value from the observer; and a voltage instruction calculation unit calculating the voltage instruction, based on the current instruction values from the current instruction calculation unit and the magnetic flux estimated value from the observer.

Abstract: A power conversion device formed of a converter for rectifying a single-phase AC voltage to a DC voltage and an inverter for driving an AC motor by converting the DC voltage to an AC voltage includes: a first compensation unit that uses a frequency component twice the frequency of the single-phase AC voltage with respect to the DC voltage outputted from the converter or a current outputted from the inverter as a compensation value for at least one of a torque command value, a current command value, a voltage command value, a frequency command value, and a phase angle command value; and a second compensation unit that uses the DC voltage outputted from the converter or a current outputted from the inverter after being subjected to low frequency cut-off processing and gain processing.

Abstract: A control apparatus for an AC rotating machine that can reliably and stably start up an AC rotating machine, particularly a synchronous motor using a permanent magnet, in position-sensorless vector control thereof, includes: a steady speed calculator that calculates, during steady state control of the AC rotating machine, a rotation angular frequency of the AC rotating machine based on an AC current and voltage commands; and a start-up speed calculator that calculates, during start-up control within a predetermined period after the AC rotating machine has been started up, the rotation angular frequency of the AC rotating machine based on the AC current and the voltage commands. The control apparatus corrects during the start-up control current commands so that the AC voltage amplitude of the voltage commands will be a constant value not more than the maximum output voltage of a power converter.