A controller executes local generation and local consumption pathways of: supplying power from a solar cell to an appliance, and charging a storage cell with power that remains after subtracting power consumed by the appliance from the solar cell power. In the absence of excess power, the storage cell and solar cell supply power. Power supply from a commercial electrical grid covers a power shortage that remains after subtracting solar cell power and storage cell power from the power consumed by the appliance. The controller also executes a second excess power selling mode pathway wherein excess power flows into the commercial electrical grid, and an assist mode wherein all solar cell power flows into the commercial electrical grid, and storage cell power flows to the appliance.

Power supply system.

In a hybrid automobile (20), if an ECO switch (88) is turned off when an engine is started, the engine (22) and motors (MG1, MG2) are controlled so as to suppress vibration resulting from torque pulsation occurring in a crankshaft (26) due to damping torque (Tv) from the motor (MG1) and to output a demand torque (Tr*) to a ring gear shaft (32a) (S140-S250). If the ECO switch (88) is turned on when the engine is started, the engine (22) and the motors (MG1, MG2) are controlled so as to output the demand torque (Tr*) to the ring gear shaft (32a) with the damping torque (Tv) from the motor (MG1) set to value 0 (S150-S250).

Vehicle and its control method

A power conversion device includes a power switching circuit that supplies AC voltages generated between switching elements operating as upper arms and switching elements operating as lower arms, and a control circuit that generates and supplies to the driver circuit signals for controlling the switching operation of the switching elements by a PWM method in a first operational region in which frequency of an AC power to be outputted is low, and that generates and supplies to the driver circuit signals for controlling the switching operation of the switching elements at timings based upon the phase of the AC power to be outputted in an operational region in which the frequency of the AC power to be outputted is higher than in the first operational region.

Power Conversion Device

Aircraft landing gear comprised of a wheel hub motor/generator disks stack, includes alternating rotor and stator disks mounted with respect to the wheel support and wheel. The invention can provide motive force to the wheel when electrical power is applied, e.g. prior to touch-down, thus decreasing the difference in relative velocities of the tire radial velocity with that of the relative velocity of the runway and reducing the sliding friction wear of the tire. After touchdown the wheel hub motor/generator may be used as a generator thus applying a regenerative braking force and/or a motorized braking action to the wheel. The energy generated upon landing maybe dissipated through a resistor and/or stored for later use in providing a source for motive power to the aircraft wheels for taxiing and ground maneuvers of the aircraft. Methods and apparatuses for nose gear steering and ABS braking using the disclosed invention are described.

Landing gear method and apparatus for braking and maneuvering

PROBLEM TO BE SOLVED: To make an electric vehicle controller advantageous in terms of space and cost, by suppressing the sudden change of motor torque at short circuiting of a resistor, and minimizing the power consumption in the resistor, thereby suppressing the drop of regeneration percentage, and reducing the capacity of the resistor. SOLUTION: This electric vehicle controller is equipped with a variable voltage variable frequency inverter 3, which converts DC into AC of optional frequency, at least one induction motor 5 for drive of a vehicle which is connected in parallel with the side of the DC of the variable voltage variable frequency inverter 3; a resistor 6 which is connected in series between the variable voltage variable frequency inverter 3 and the induction motor 5; and a chopper 9, which is connected in parallel with the resistor 6 and has a switching function. When the voltage between the terminals of the induction motor 5 is higher than the output voltage of the variable voltage variable frequency inverter 3 at power regenerative brake or at power generating brake, this makes the circulation percentage of the chopper a first conduction ratio; and when it is lower than the output voltage, this makes the conduction ratio a second circulation percentage higher than the first conduction ratio. COPYRIGHT: (C)2004,JPO

Electric vehicle controller

PROBLEM TO BE SOLVED: To provide a highly reliable motor drive unit in a small size at a low cost, dispensing with the current limiting device of a capacitor being a main power source. SOLUTION: The drive unit 30 performs voltage control so that the inter-terminal voltage of a capacitor C1 becomes substantially the same as the DC voltage Vb of a battery B in timing before the activation start of a vehicular system. When the inter-terminal voltage Vc is lower than the lower limit value in a voltage range generating no inrush current, an engine ENG is started with the battery B, and then a target engine rotational speed is decided to drive the engine ENG. After that, a motor generator MG1 is driven with the driving force of the engine ENG in a regenerative mode to charge the capacitor C1 with the regenerative electric power. On the other hand, when the inter-terminal voltage Vc exceeds the upper limit value in the voltage range, a boosting converter 12 is driven and controlled to boost the voltage Vm at both ends of the capacitor C2 up to the inter-terminal voltage Vc, and then system relays SRC1, SRC2 are turned on. COPYRIGHT: (C)2006,JPO&NCIPI

Motor drive unit

Upon power failure of a commercial power source, an automatic switching device switches to power supply from a hybrid vehicle. An ECU of the vehicle, when receiving a request for generation of a commercial AC voltage, sets an upper-limit power generation amount based on a remaining amount of fuel. The ECU transmits the upper-limit power generation amount via an antenna to an on-premises ECU, while controlling a power generation amount based on the upper-limit power generation amount. The on-premises, when receiving the upper-limit power generation amount, controls the load state such that commercial AC power is supplied firstly to a first load of priority level 1, according to proprieties registered in advance, and such that the amount of the power supplied to the electric loads does not exceed the upper-limit power generation amount.

Ac Power Supplying System, Power Supply Apparatus, and Vehicle Having the Same

A drive unit of the invention comprises a motor that can input/output motive power to/from a drive shaft, a drive circuit that performs drive control of the motor, a fuel cell that is connected to the drive circuit without the intervention of a voltage converter such that electric power can be output, a charge/discharge portion that is connected to the fuel cell in parallel and to the drive circuit such that electric power can be output and that has at least one capacitor whose voltage in a fully charged state is higher than an inter-open-terminal voltage of the fuel cell, a diode that is installed between the fuel cell and the charge/discharge portion such that electric power can be output only in a direction from the fuel cell to the charge/discharge portion, and a drive control portion that controls the drive circuit such that drive control of the motor is performed on the basis of required motive power to be transmitted to the drive shaft. This drive unit is characterized in that the drive circuit performs drive control of the motor through the output of electric power from the charge/discharge portion or the output of electric power from the charge/discharge portion and the fuel cell.

Drive unit and vehicle equipped therewith

A first hybrid vehicle (10A) is connected to a house-side connector (40). A second hybrid vehicle (10B) is connected to the first hybrid vehicle (10A), and they are connected in parallel within the first hybrid vehicle (10A) with respect to a house load (20). When a commercial system power source (50) is interrupted, an automatic switching circuit (30) is activated, and the house load (20) receives electric power from the first and second hybrid vehicles (10A, 10B). The first hybrid vehicle (10A) determines allocations of the amounts of electric power supply from the first and second hybrid vehicles (10A, 10B) based on the amount of the house load (20) and on the residual amounts of fuel in the first and second hybrid vehicles (10A, 10B).

Electric-power supply system, and vehicle

PROBLEM TO BE SOLVED: To increase the overall efficiency of a fuel cell system by an intermittent operation of the fuel cell, and to improve the starting response of the fuel cell after being stopped. SOLUTION: In the fuel cell system for supplying load power from the fuel cell 20 and a secondary battery 30, the intermittent operation of the fuel cell is performed so that in a low load region, the fuel cell 20 is stopped and the load power is supplied from the secondary battery 30. In this case, the threshold of stopping/starting of the fuel cell 20 is adjusted depending on an open circuit voltage (OCV) of the fuel cell 20 in a stopping state (S180-S200). As a result, fuel consumption to maintain the open circuit voltage when the fuel cell is stopping, is avoided, and a restart response from the state that the open circuit voltage of the fuel cell 20 stopping a power generation drops is improved. COPYRIGHT: (C)2005,JPO&NCIPI

Fuel cell system and vehicle

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