Abstract: The hybrid power generation system includes a renewable energy power generation device and a rotary power generation device connected to a common alternating-current power system. In the system, if renewable energy or an output fluctuates, a correction value calculated based on the fluctuation amount is added to a control parameter as a feedforward component, controlling the rotary power generation device.

Abstract: In a marine hybrid system which includes an engine, an electric motor, a thrust generation device, and a clutch mechanism configured to be able to switch connection states therebetween, if it is determined that the engine is in an overload condition, the clutch mechanism is controlled such that a load of the engine is reduced.

Abstract: In a marine hybrid system which includes an engine, an electric motor, a thrust generation device, and a clutch mechanism configured to be able to switch connection states therebetween, if it is determined that the engine is in an overload condition, the clutch mechanism is controlled such that a load of the engine is reduced.

Abstract: The hybrid power generation system includes a renewable energy power generation device and a rotary power generation device connected to a common alternating-current power system. In the system, if renewable energy or an output fluctuates, a correction value calculated based on the fluctuation amount is added to a control parameter as a feedforward component, controlling the rotary power generation device.

Abstract: An industrial vehicle having a hybrid system controls a distribution of power generated by an engine and power generated by an electric motor. The vehicle includes an engine for supplying power to one of a running unit and a loading-and-unloading unit; a first motor for supplying power to one of the running unit and the loading-and-unloading unit; a second motor for supplying power to the running unit; a required-power calculating unit for calculating running power, and loading-and-unloading power; a clutch unit for controlling the power transmitted from the engine to the running unit; and a power-distribution calculating unit for selecting a destination to be supplied with power from the engine and the first motor based on the control status of the clutch unit, and for calculating a distribution of power which the engine, the first motor, and the second motor supply based on the calculating running power and loading-and-unloading power.

Abstract: An inverter apparatus is composed of an insulated metal substrate, a conductive stud, a printed circuit board, a conductive spacer, and a bus bar. An inverter output stage is mounted on the insulated metal substrate. The conductive stud is coupled to a main surface of the insulated metal substrate, and electrically connected with the inverter output stage. The printed circuit board is supported by the stud. The stud is coupled on the rear surface of the printed circuit board. Provided on the main surface of the printed circuit board is a circuit connected to the inverter output stage. The conductive spacer is coupled on the main surface of the printed circuit board, and electrically connected with the stud. The bus bar is coupled to the spacer.

Abstract: An electric vehicle drive DC-DC converter and an electric vehicle are provided in which the electric vehicle drive DC-DC converter is constructed by connecting a plurality of DC-DC converter units in parallel, and in which a smoothing capacitor is allowed to be reduced in size thereof so that the DC-DC converter unit can be constructed in a small size, and electric power required by the electric vehicle can be coped with by only increasing the number of DC-DC converter units. Each of the DC-DC converter units includes: a coil having both ends thereof being connected to a DC power source and an electric vehicle drive source (motor); and a drive element which is connected in parallel to the electric vehicle drive source and driven in response to a signal supplied from a control circuit, the drive element having combined therewith a load current commutation diode.

Abstract: An inverter apparatus is composed of an insulated metal substrate, a conductive stud, a printed circuit board, a conductive spacer, and a bus bar. An inverter output stage is mounted on the insulated metal substrate. The conductive stud is coupled to a main surface of the insulated metal substrate, and electrically connected with the inverter output stage. The printed circuit board is supported by the stud. The stud is coupled on the rear surface of the printed circuit board. Provided on the main surface of the printed circuit board is a circuit connected to the inverter output stage. The conductive spacer is coupled on the main surface of the printed circuit board, and electrically connected with the stud. The bus bar is coupled to the spacer.

Abstract: An inverter apparatus is composed of a power MOSFET having a source/drain connected to an output terminal, and a gate drive circuit driving a gate of the power MOSFET. The gate drive circuit includes a discharging path connected with the gate of the power MOSFET. The discharging path includes a set of serially-connected diodes which are forward-connected in a direction of a discharge current from the gate of the power MOSFET.

Abstract: In an apparatus of controlling a motor in a battery vehicle, a current command generation section has a table, and generates an exciting command current and a torque command current by referring to the table based on a torque command. A converting section generates 3-phase command voltages from the exciting command current and the torque command current. A motor driving section drives a motor in response to the 3-phase command voltages.

Abstract: An inverter apparatus is composed of an insulated metal substrate, a conductive stud, a printed circuit board, a conductive spacer, and a bus bar. An inverter output stage is mounted on the insulated metal substrate. The conductive stud is coupled to a main surface of the insulated metal substrate, and electrically connected with the inverter output stage. The printed circuit board is supported by the stud. The stud is coupled on the rear surface of the printed circuit board. Provided on the main surface of the printed circuit board is a circuit connected to the inverter output stage. The conductive spacer is coupled on the main surface of the printed circuit board, and electrically connected with the stud. The bus bar is coupled to the spacer.

Abstract: The present invention provides an industrial vehicle having a hybrid system capable of readily controlling a distribution of power generated by an engine and power generated by an electric motor, and a method of controlling; the power of the same.

Abstract: A forklift having a cargo apparatus, the responsiveness of which to the operation by a user is improved. The forklift has: a DSP which generates a frequency instruction f* in response to the operation to a cargo apparatus operation lever, a voltage instruction V* from the frequency instruction f* by using the VVVF control, inverter control signals from the voltage instruction v*; an inverter which generates the three-phase electric power in response to the inverter control signal; a hydraulic pump; an induction motor driving a hydraulic pump by using the three-phase electric power; and a cargo apparatus which is driven by the hydraulic pressure supplied from the hydraulic pump.

Abstract: An inverter apparatus is composed of a power MOSFET having a source/drain connected to an output terminal, and a gate drive circuit driving a gate of the power MOSFET. The gate drive circuit includes a discharging path connected with the gate of the power MOSFET. The discharging path includes a set of serially-connected diodes which are forward-connected in a direction of a discharge current from the gate of the power MOSFET.

Abstract: In an apparatus of controlling a motor in a battery vehicle, a current command generation section has a table, and generates an exciting command current and a torque command current by referring to the table based on a torque command. A converting section generates 3-phase command voltages from the exciting command current and the torque command current. A motor driving section drives a motor in response to the 3-phase command voltages.

Abstract: A forklift having a cargo apparatus, the responsiveness of which to the operation by a user is improved. The forklift has: a DSP which generates a frequency instruction f* in response to the operation to a cargo apparatus operation lever, a voltage instruction V* from the frequency instruction f* by using the VVVF control, inverter control signals from the voltage instruction v*; an inverter which generates the three-phase electric power in response to the inverter control signal; a hydraulic pump; an induction motor driving a hydraulic pump by using the three-phase electric power; and a cargo apparatus which is driven by the hydraulic pressure supplied from the hydraulic pump.

Abstract: A structure includes a substrate; and an electrode joined to the substrate by soldering. The electrode has a cavity which has an opening to a joining plane to the substrate. The joining plane is circular.

Abstract: An inverter apparatus is composed of an insulated metal substrate, a conductive stud, a printed circuit board, a conductive spacer, and a bus bar. An inverter output stage is mounted on the insulated metal substrate. The conductive stud is coupled to a main surface of the insulated metal substrate, and electrically connected with the inverter output stage. The printed circuit board is supported by the stud. The stud is coupled on the rear surface of the printed circuit board. Provided on the main surface of the printed circuit board is a circuit connected to the inverter output stage. The conductive spacer is coupled on the main surface of the printed circuit board, and electrically connected with the stud. The bus bar is coupled to the spacer.

Abstract: A propulsion motor control apparatus for a battery vehicle including; a steering angle detection device for detecting a steering angle subtended between a common axis of two front wheels, and an axis of a rear wheel. Also included is a ratio computing device for computing a ratio between a distance between an intersection point of the two axes and a front wheel (outer wheel) on a side further from the intersection point, and a distance between the intersection point and a front wheel (inner wheel) on a side closer to the intersection point, based on the steering angle, a function determining device for determining a motor rotation speed/current command value function for the inner wheel based on a motor rotation speed/current command value function for the outer wheel and the obtained ratio, and a control device for individually controlling the respective propulsion motors for the two front wheels based on the two functions.

Abstract: The propulsion motor control apparatus for a battery vehicle of the invention comprises; a steering angle detection device for detecting a steering angle subtended between a common axis of two front wheels, and an axis of a rear wheel, a ratio computing device for computing a ratio between a distance between an intersection point of the two axes and a front wheel (outer wheel) on a side further from the intersection point, and a distance between the intersection point and a front wheel (inner wheel) on a side closer to the intersection point, based on the steering angle, a function determining device for obtaining a motor rotation speed/current command value function for the inner wheel based on a motor rotation speed/current command value function for the outer wheel and the obtained ratio, and a control device for individually controlling the respective propulsion motors for the two front wheels based on the two functions.