摘要:
In a power conversion apparatus having a smoothing capacitor for smoothing rectified voltage, a power module containing a plurality of power semiconductor switching devices, and a drive circuit for controlling the turn-on and turn-off of the power semiconductor switching devices, wherein the power module is encased in the housing which does not encase the drive circuit; the housing encasing the power module therein is attached in contact with the housing encasing therein the transmission of an prime mover.
摘要:
A battery performance monitoring system anticipates the sudden fall of battery output. The system measures the battery voltage at a time point when the discharge current of a battery becomes smaller than the reference current value or at a time point when the current to the load which is connected to the battery becomes smaller than the reference current value, and judges the battery to be abnormal if the difference of the measured battery voltage from the approximate formula in regard to the current-voltage relation in the former half of a same discharge event becomes out of the reference range.
摘要:
A power module constructs a pressurizing tool by laminating an elastic member as well as a DC positive-side wiring member and DC negative-side wiring member in which currents flow in opposite directions. The pressurizing tool presses a first fixing tool, and then the first fixing tool presses semiconductor equipment. The semiconductor equipment is fixed to a heat dissipating member with its heat dissipating surface brought into surface contact with side wall surfaces of the heat dissipating member. The power module can enhance heat dissipation between a heat dissipating member and semiconductor equipment, and enables the semiconductor equipment to be fixed to the heat dissipating member without adding other components to the power module.
摘要:
A power supply unit, a distributed power supply system and an electric vehicle loaded therewith, capable of charge/discharge operation are disclosed. A first cell group is connected in parallel to a second cell group in which the electrolytic solution can be electrolyzed or the generated gas can be recombined. A plurality of the parallel circuit pairs are connected in series, and the series circuit is connected with a charger/discharger to constitute the power supply unit. The charger/discharger charges the power supply unit up to a voltage at which the electrolytic solution of the second cell group is electrolyzed or the generated gas is recombined.
摘要:
In a driving apparatus of a power semiconductor element for conducting or interrupting a main current, first resistance variable for changing a first resistance according to a control voltage, and second resistance variable for changing a second resistance according to a voltage between a first and a second terminal are provided, and either one of a voltage of a control power supply or a voltage between the first and the second terminal is voltage-divided by the first resistance and the second resistance, and the divided voltage is applied to a control gate terminal at the time of conducting or interrupting the main current.
摘要:
An electronic image pickup apparatus picks up an object image such as an image on a blackboard and outputs the image. The apparatus can synthesize a picked-up image with format data input from another unit and output the synthesized image. When synthesis processing is to be performed, format data to be synthesized are created and stored in several line buffers in advance. When a picked-up one-line image signal is written in a line buffer of 1 line, the format data stored in the several line buffers are read out, and the image signal and the format data are synthesized in the line buffer of 1 line. By outputting the data in this line buffer in units of lines, the synthesized data obtained by synthesizing the picked-up image with the format data is output. A movable focus screen and a movable mirror are provided, along with a driving device for moving the focus screen and the mirror, in order to eliminate the need for a separate shutter plate, thus enabling miniaturization of the electronic image pickup apparatus.
摘要:
A power supply control system including a variable power converter for converting electric power from a power supply to a load into that of a specification required by the load in response to a power specification information source provided on the load side. With a change in the load, the information source also changes, thereby providing a flexible power supply control system capable of meeting different loads. For applications to a high power supply, the system comprises a plurality of variable power converters adapted to operate selectively in accordance with requisite power information sources provided in or on the side of a plurality of loads, thereby providing a system realizing a flexible power supply. For application to a low power supply, the system comprises a plug having a power specification information source and a socket having a variable power converter.
摘要:
A three-phase bridge inverter for controlling a motor with a variable speed includes a drive circuit therefor and an overcurrent protection circuit on one integrated chip. The inverter IC can be operated by directly inputting a direct current obtained by rectifying commercial 100 V. Thus, the inverter chip reduces the size and the weight of a system, improves the usability, lowers the cost thereof and permits mass production fabrication. Also, the life of the IC is increased by detecting current flowing through the inverter and the temperature of the chip and stopping the operation, when an abnormality is found.
摘要:
The switching of upper and lower switching elements is controlled by respective upper and lower arm driving circuits. Those switching elements are connected in series across a primary d.c. power source and their successive switching generates a drive voltage which is applied to a load. A secondary d.c. power source is connected to the lower arm driving circuit while the upper arm driving circuit is connected to a capacitor connected to the high potential side of the primary d.c. power source. The capacitor is charged from the secondary d.c. power source through a charging circuit. This driving arrangement is particularly applicable to multi-phase driving circuits.
摘要:
A semiconductor device comprises a heavily doped semiconductor layer exposed to both principal surfaces of a semiconductor substrate, a semiconductor element such as a diode, a bipolar transistor, and a MOS transistor, etc. formed on one principal surface side of the semiconductor substrate, a resistor region connected in series with the semiconductor element on the other principal surface side of the semiconductor substrate, and an electrode for current detection kept in contact with the semiconductor layer on the one principal surface side.