Abstract: In a capacitor-compensation-type generator having a rotor wound with a field winding, a stator wound with an output winding adapted to cross flux generated by the field winding to output AC power, and an internal combustion engine that drives the rotor to rotate relative to the stator, there are equipped with an actuator that changes the engine speed and an actuator controller that controls operation of the actuator in accordance with a constant voltage operation mode in which the engine speed is controlled to a desired speed such that a detected output voltage becomes a desired voltage, or a constant frequency operation mode in which the detected engine speed is controlled to a predetermined speed such that frequency of AC power outputted from the output winding becomes a desired frequency, thereby enabling to output AC power at constant voltage or frequency.

Abstract: The present invention provides a transistor type ignition apparatus suitable for a gas engine in which high voltage output can be obtained with low input electricity. The ignition apparatus includes an ignition coil 2 having a primary coil 21 connected to a battery 6 and a secondary coil 22 connected to a spark plug 4, and a control circuit 3 having a transistor 32 which controls on and off of current flowing through the primary coil 21. The ignition apparatus also includes a surge absorbing capacitor 5 which is connected in parallel to the primary coil 21 and in which electric charge is accumulated by induced voltage of the primary coil 21. Electric charge is accumulated in the surge absorbing capacitor 5 by induced voltage of the primary coil 21. High secondary voltage is induced in the secondary coil 22 by discharge of the electric charge.

Abstract: The present invention provides a control power supply capable of stably operating to output a desired voltage as electric power, even when the input voltage thereof varies over a wide range. A power supply includes a rectification circuit 2 for rectifying the AC output from a power generator 1 and a non-insulation type DC/DC converter 3 for stepping down the DC output from the rectification circuit 2. A self-excited oscillation type converter (RCC) 4 is provided at the following stage of the non-insulation type DC/DC converter 3. The input voltage which has been stepped down by the converter 3 is input to the primary side of the RCC 4, and the RCC 4 stably operates with the input voltage which varies largely to supply, from its secondary side, a power supply to an ECU 5 or the like.

Abstract: A circuit breaker with overload and short-circuit protection functions for a motor, on which is mounted a thermally actuated overload tripping device including an adjustment dial to set a value corresponding to a rated current value of the motor on a scale. The dial has a standard setting pointer mark and a correction setting pointer mark side-by-side along a perimeter. The standard setting pointer mark applies to using the circuit breaker as a single item. The correction setting pointer mark applies to using a number of circuit breakers arranged in a line in close contact with each other. By setting a mark selected according to the arrangement of the circuit breaker at the rated current value, the steady state current value of the tripping device can be adequately set to correspond to the rated current value of the motor.

Abstract: A first primary winding N11 of a transformer 1 is connected with a commercial power source 30 via a transistor Q1, and a second primary winding N22 of the transformer 1 is connected with a backup battery 31 via a transistor Q2. An electric power on the second primary winding N12 is output for a controlling apparatus. When a voltage of the commercial power source 30 is larger than a predetermined value, a backup stopping circuit 10 turns off a LED 9 and stops the transistor Q2. The second primary winding N22 is connected with input terminals 14, 15 as a power source for charging a battery 31. While the transistor Q2 is stopped, an electric power for the battery is output from the second primary winding N22. Since the LED 9 turns on at the time of electric power breakdown, the electric power for the battery is stopped.

Abstract: The invention makes it possible to secure a maximum output within the capacity range of an electrical power source by preventing an output from being cut by a protective function of a converter at the time of a temporary overload. A bidirectional DC-DC converter 4 for stepping up a voltage of DC power supplied from a battery 5 is provided. A stepped-up DC power is converted to an AC power by an inverter 3-2 via a regulator 3-1 and is outputted to the load side. An input voltage V1 of the regulator 3-1 is detected by a voltage detecting portion 15 and is inputted into an output limit determining portion 16. The output limit determining portion 16 determines an output voltage value for starting to limit an inverter output according to a distance from when the input voltage V1 fell below a limit starting voltage value Vlim to a limit voltage value Va. An inverter driving portion 17 limits an output by switching FETs in the inverter 3 in accordance with this output voltage value.

Abstract: This invention realizes control without using a current-detecting element to prevent over current from flowing into a switching element of a switching converter in response to an input primary voltage from a small-capacity DC power source. The switching converter includes an FET 30 that turns the input primary voltage from the DC power source 1 on and off, and a choke coil 31 that is charged or discharged according to turning on/off of this FET 30. A driver 13 drives the FET so that an output voltage detected by an output voltage detector 9 is converged to a target voltage. A means for calculating a current I that flows into the FET 30 based on a duty ratio of the input primary voltage and the FET 30 and the inductance of the choke coil 31. The driver 13 drives the FET 30 at a duty ratio set so as to prevent the estimated current value I from exceeding a permissible current value or stops driving when the estimated current value I is equal to or more than the permissible current value.

Abstract: A cogeneration system that is operated in system connection is disconnected from the system and operated independently at a power failure of the system. A power generator 1 driven by an engine E is connected to a system 9. A water-cooling device 13 recovers exhaust heat of the engine E. When an operating switch 20 is switched, to its independent operation mode for an independent operation apart from the system 9, the upper limit of the target rotation speed Ntgt of an electronic governor 16 is increased over that at system connection operation, thereby the engine speed can be increased, and the maximum output point of the power generator 1 is increased for operation.

Abstract: The present invention provides a control power supply capable of stably operating to output a desired voltage as electric power, even when the input voltage thereof varies over a wide range. A power supply includes a rectification circuit 2 for rectifying the AC output from a power generator 1 and a non-insulation type DC/DC converter 3 for stepping down the DC output from the rectification circuit 2. A self-excited oscillation type converter (RCC) 4 is provided at the following stage of the non-insulation type DC/DC converter 3. The input voltage which has been stepped down by the converter 3 is input to the primary side of the RCC 4, and the RCC 4 stably operates with the input voltage which varies largely to supply, from its secondary side, a power supply to an ECU 5 or the like.

Abstract: An output from an electric generator 1 is rectified by a DC converter unit 2. An output from the DC converter unit 2 is regulated in voltage by the DC-DC converter unit 3 and converted into an AC output having a predetermined frequency by the DC-AC converter unit 4. The DC-AC converter unit 4 includes a median converter unit 4-1 to form a median of the DC voltage output from the DC-DC converter unit 3, an inverter 4-2, and a filter 4-3 and outputs a single-phase three-wire output to output lines 5-1 to 5-5.

Abstract: To provide a DC-DC converter allowing miniaturization of a voltage transformer without fear of reducing conversion efficiency due to saturation of the transformer and allowing enhancement of conversion efficiency by suppressing switching loss. An LC resonance circuit 3 is inserted on the secondary side of a transformer 1. When driving means 4 alternately turn on and off a pair of switching means 2-1, 2-2, an output is obtained on the secondary side via the transformer 1. A current transformer 5 for current detection, a current value detection portion 6 and a current value comparison portion 7 detect a difference between each resonance current value per half cycle due to the operation of the LC resonance circuit 3. In response to its result, the drive means 4 regulate automatically on-state duty ratio of the switching means 2-1, 2-2 so as to align the resonance current values per half cycle.

Abstract: To provide a DC-DC converter capable of suppressing switching loss with a simple structure, and capable of enhancing converting efficiency. An LC resonant circuit 3 is inserted on a secondary side of a transformer 1. If switching means 2 is turned ON or OFF by driving means 4, output can be obtained on the secondary side through the transformer 1. A resonant current frequency detecting means comprises a current detecting current transformer 5 and a frequency detecting unit 6. The resonant current frequency detecting means detects resonant current frequency caused by operation of the LC resonant circuit 3. This frequency is fed back to the driving means. As a result, the driving means 4 turns the switching means 2 ON or OFF at a frequency corresponding to the resonant frequency of the LC resonant circuit 3.

Abstract: Rectifying elements are connected in parallel with switching elements 4-1 through 4-4 in a switching section 4 for the lower voltage side and rectifying elements are connected in parallel with switching elements 5-1 through 5-4 in a switching section 5 for the higher voltage side. An LC resonant circuit 6 is provided between the winding wire 3-2 for the high-voltage side in the transformer 3 and the switching section 5 for the higher voltage side; currents which flows on the primary side and the secondary side is changed into a sinusoidal one; and switching is executed in the vicinity of the zero crossing points of the currents.

Abstract: In a power supply apparatus having an engine operated generator, the operation of the power supply apparatus is improved in the efficiency in a light load region. The generator 1 is driven by the engine. The output of the generator 1 is converted into alternating power of a particular frequency by a rectifier circuit 2 and a converter 4 and is output to a load. A two-way DC-DC converter 5 supplies the power of a battery 6 to the converter 4. When a load current is equal to or less than a predetermined value, the power generated by the battery 6 is supplied to the load, and the power generated by the generator 1 is not used. If the power supply ability of the battery 6 is lowered, the power generated by the generator 1 is supplied to the load, and the battery 6 is charged.

Abstract: A system interconnection control section 7 interconnects and parallels off an output from a generator 1 with a system 9, and supplies an output from the generator 1 to a load 10. A selection switch 24 that selects operation modes of the generator 1 is provided. The operation modes are an interconnected operation mode to shut down operation of the generator 1 and an isolated operation mode to operate the generator 1 after disconnecting the output from the generator 1 from the system, when a power of the system 9 has been stopped. During a power failure, the selection switch 24 is switched to select a start and a shutdown of an isolated operation.

Abstract: A decorative laminate 40 in which a substrate 5 and a decorative sheet 10 comprising a base sheet 1 and at least a resin coat layer 2 provided on one surface thereof are laminated with each other, wherein the resin coat layer 2 is scraped partly or entirely. The antique style decorative laminate is provided thereby, with the process of work simplified and with the influence on the environment and human body decreased, moreover without installing equipment for exclusive use.

Abstract: An N-channel MOS transistor is used to configure a DC—DC converter having good characteristics without providing a particular voltage circuit which outputs a voltage higher than an input voltage. An N-channel MOS transistor 11 and a choke coil 12 are connected in series between a negative side of a direct-current power supply and a negative side of the output capacitor 8. A PWM circuit 14 applies pulse signals to a gate of the MOS transistor 11 based on the input voltage divided by the capacitors 9 and 10. The pulse signal of the PWM circuit 14 is formed by the voltage corresponding to the output voltage of the output capacitor 8, and the pulse signal is inputted to the gate of the N-channel MOS transistor 11 through a photocoupler 16.

Abstract: An engine generator, sufficiently meeting a demand for a simple configuration and easy control, is provided. The output of a generator 1 connected to an engine 2 is output through a rectifier circuit 3 and an inverter 4. The generator 1 is a dual-purpose generator both for a generator function and for an electric motor function, and is driven by a drive inverter as an engine starting electric motor. A DC—DC converter 5 is provided between the output side of the rectifier circuit 3 and the output terminal of a battery 6. The generator 1 is driven as an engine starting electric motor, using the battery 6 as a power supply, when the engine is started.

Abstract: An N-channel MOS transistor is used to configure a DC-DC converter having good characteristics without providing a particular voltage circuit which outputs a voltage higher than an input voltage. An N-channel MOS transistor 11 and a choke coil 12 are connected in series between a negative side of a direct-current power supply and a negative side of the output capacitor 8. A PWM circuit 14 applies pulse signals to a gate of the MOS transistor 11 based on the input voltage divided by the capacitors 9 and 10. The pulse signal of the PWM circuit 14 is formed by the voltage corresponding to the output voltage of the output capacitor 8, and the pulse signal is inputted to the gate of the N-channel MOS transistor 11 through a photocoupler 16.

Abstract: A plurality of control power sources of voltage specifications different from one another are constructed. A generator output converted by a converter into a DC current is converted by an inverter into an AC current of a predetermined frequency. The generation output is rectified by second rectifier circuits and a capacitor and is then input to an RCC. The RCC constitutes a self-excited oscillation circuit, energy is stored into a transformer in an ON time of a transistor corresponding to an oscillation frequency thereof, and the energy is transferred to a secondary side in an OFF time. In the secondary side of the RCC, windings are formed corresponding to the number of required power sources. One group of windings forms both positive and negative power sources of a control power source, and another group of windings forms a power source for an FET driver.