摘要:
A composite transformer, having first and second inductors and a transformer, includes a transformer core that has a core leg around which portions of first and second windings are wound, and a base fixing the core leg, a first inductor core that has a core leg around which a portion of the first winding is wound and a base fixing the core leg, and a second inductor core that has a core leg around which a portion of the second winding is wound and a base fixing the core leg. The first and second windings are wound in a manner that flux are cancelled with each other, and are wound around the core leg of the transformer core in a manner alternately overlapping with each other, and are wound around respective core legs of the first and second inductor cores so as to be apart from each other to suppress any interference of magnetic fluxes.
摘要:
A fuel cell power supply includes a fuel cell voltage detection means which detects a terminal-to-terminal voltage of the fuel cell; an internal resistance calculation means which supplies electric power from a battery to a motor via a second DC-DC converter and calculates a resistance value of an internal resistance of the fuel cell on the basis of a detection voltage of the fuel cell in a state where a current output of the fuel cell is stopped, a detection voltage of a terminal-to-terminal voltage of the fuel cell in a state where the output current of the fuel cell is adjusted to a value, and the value; and a deterioration level determination means which determines a deterioration level of the fuel cell on the basis of a change in the resistance value of the internal resistance of the fuel cell.
摘要:
It is an object of the present invention to provide a fuel cell power supply device that can realize a reduction in size and improvement of durability of an accumulating unit while maintaining output performance that is applicable when large output is requested. The fuel cell power supply device includes: an output judging unit 31 that judges whether the output of a fuel cell 1 is equal to or higher than a predetermined level with respect to electric power requested by a load 5; and a power-supply controlling unit 30 that limits, when it is not judged that the output of the fuel cell 1 is equal to or higher than the predetermined level, the output of an accumulating unit 21 to be equal to or smaller than a first output limit value for allowing continuous output in first output time an limits, when it is judged that the output of the fuel cell 1 is equal to or higher than the predetermined level, within second output time shorter than the first output time, the output of the accumulating unit 21 to be equal to or smaller than a second output limit value, which is larger than the first output limit value, for allowing continuous output in the second output time.
摘要:
Combined type transformer includes: a transformer core; first and second coils provided with respect to the transformer core; first and second inductor cores provided around the first coil; and third and fourth inductor cores provided around the second coil. The transformer core and the first and second coils constitute a transformer, the first coil and the first and second inductor cores constitute a first inductor, and the second coil and the third and fourth inductor cores constitute a second inductor.
摘要:
A multiple input/output power converter includes: at least two input/output circuits to be connected to electric units; a plurality of power converting circuits including switches and at least an inductor, a plurality of capacitors connected to the power converting circuits; and a control circuit for controlling the switches in a plurality of modes to selectively operate the inductor and the capacitors to operate the power converting circuits in either of stepping up, stepping down, or conducting operation. The capacitors are shared among the power converting circuits.
摘要:
A DC/DC converter that is small, light, highly efficient, and inexpensive are provided which includes a DC power supply input section, a first and second capacitor connected in series, and an output section connected to the series connected first and second capacitors, a switching device that switches a plurality of switches which incorporate a configuration for connecting a power supply of the DC power supply input section, to the first capacitor and the second capacitor, and a switching control device that controls ON/OFF switching of the respective switches in the switching device in accordance with an operation mode.
摘要:
When a control means turns on a pre-charging contactor, an AC current from an AC power source is converted into a DC current by a switching circuit to charge a smoothing capacitor. However, the smoothing capacitor cannot be charged completely due to the operation of a capacitor of an LC filter. Therefore, when the voltage of the smoothing capacitor detected by a voltage detecting means exceeds a predetermined value, the smoothing capacitor is further charged by bringing the switching circuit into a boosting operation. Thus, even if an LC relay required in the prior art for invalidating the capacitor of the LC filter is not provided, it is possible to completely charge the smoothing capacitor, thereby providing a decrease in the number of parts and an enhancement in reliability of the pre-charging circuit, and preventing a reduction in performance of the LC filter due to a loss in the LC relay.
摘要:
A legged walking robot such as a two-legged walking robot has a plurality of movable legs and a plurality of foot soles mounted respectively on distal ends of the movable legs by respective foot joints. Each of the foot soles has a curved surface disposed on at least a portion of a peripheral edge thereof. The curved surface is shaped such that the foot joint follows a predetermined curved path along a forward direction in which the legged walking robot walks. The foot sole also includes at least one projection on one or each of leading and trailing ends of the foot sole in the forward direction. The projection is movable into and out of a projecting position from the foot sole, but is normally urged into the projecting position to support the foot sole stably on the terrain.
摘要:
A composite (combined type of) transformer includes: a transformer core including a plurality of transformer magnetic leg portions, a transformer magnetic leg portion, and a pair of transformer bases; a plurality of inductor cores each including an inductor magnetic leg portions, inductor outer magnetic leg portions, and a pair of inductor bases; and a plurality of windings wound around the transformer magnetic leg portion and the inductor magnetic leg portions. The windings are wound to generate magnetic fluxes in such directions as to be cancelled out in a magnetic closed circuit in the transformer core.
摘要:
In an apparatus for heating a battery of a vehicle, having an electric rotating machine and buck-boost converter between the battery and rotating machine to step up/down voltage outputted from the battery to be supplied to the rotating machine and step up/down voltage generated by the rotating machine to be supplied to the battery, it is configured to have a first capacitor interposed between wires connecting the battery to the converter, a second capacitor interposed between wires connecting the converter to the rotating machine, and a heating controller to control operation of the converter to generate current similar to rectangular wave current and input/output the current between the battery and the second capacitor through the first capacitor so as to heat the battery. With this, it becomes possible to efficiently heat the battery so that the battery can output expected power, without adversely affecting the size of the apparatus.