Abstract: An engine operated generator is arranged to constantly respond to a change in the load with a margin of power. The output current of the generator 1 driven by an engine 2 is rectified by a converter 3 composed of a thyristor bridge structure. A direct current released from the converter 3 is converted by an inverter 4 to an alternate current at a commercial frequency and connected to a load 5. A thyristor driver circuit 9 controls the conduction of thyristors so that the voltage at the input of the inverter 4 is constant. A fuel flow controller 10 detects the conduction angle of the thyristors and the revolution of the engine 2 is controlled so that the conduction angle is converged on a target conduction angle. Since the target conduction angle is set within a predetermined range smaller than the maximum conduction angle, the generator is maintained with margins of its output and can thus provide a stable level of voltage and respond quickly to a change in the load.

Abstract: An outer rotor-type multi-pole generator includes a plurality of coils wound around a large number of protruding poles provided around an outer periphery of a stator core through a bobbin, and terminal members fitted into fitting tube portions integrally provided on the bobbin to pass through the stator core over opposite ends of the stator core. Each of the coils is connected to one end of the terminal member. Each of the terminal members includes a flat plate-shaped base portion fitted into the fitting tube portion and a clamping plate portion protruding sideways from one end of the base portion. The end of the coil is connected to the one end of the terminal member by fusing with the clamping plate portion being folded in such a manner that the end of the coil is clamped between the clamping plate portion and one end of the base portion. Thus, the operation for connecting the coils to the terminal members is facilitated, and the number of steps of the connecting operation is reduced.

Abstract: A connecting terminal for a stator which is fitted and fixed in a fitting bore provided in a bobbin included in the stator, includes an external-conductor connecting terminal section fitted and fixed in the fitting bore with one end connected to an external conductor protruding from the fitting bore, a flat plate-shaped connecting plate section connected at one end at right angles to the other end of the external-conductor connecting terminal section and extending outwards in a radial direction of the stator, and a coil connecting terminal section which extends away from the bobbin and which is connected at right angles to the other end of the connecting plate section, so that the coil connecting terminal section can be folded to a position superposed onto the connecting plate section.

Abstract: An outer-rotor type engine-operated generator is of low cost and simple construction, can be miniaturized and can leak electricity for ignition without sacrificing generator output. The engine-operated generator has a plurality of magnets arranged along an inner circumference of an outer cylindrical wall of an outer-rotor and a multipolar stator housed within the outer-rotor facing the magnets. An electricity generating section for an engine ignition device is disposed on an outside of and opposite to the outer cylindrical wall of the outer-rotor, and a through window, through which magnetic force of the magnets affects the electricity generating section, is formed in a part of the outer cylindrical wall.

Abstract: A portable power unit is provided. A desired waveform signal indicative of a desired waveform having a desired frequency is generated. Switching control of a variable control bridge circuit is performed based on the desired waveform signal to cause the variable control bridge circuit to generate an alternating current output. A waveform of the alternating current output is detected to generate an output waveform signal indicative of the detected waveform of the alternating current output. A power factor is detected by comparing the desired waveform signal and the output waveform signal to generate a power factor signal indicative of the detected power factor. Voltage of the alternating current output is controlled based on the power factor signal.

Abstract: A portable power unit has a magneto generator having three-phase output windings. A synchronizing signal is formed in synchronism with an output frequency of the magneto generator. A pair of variable control bridge circuits are connected to the three-phase output windings and connected in antiparallel connection to each other to form a cycloconverter for generating a single-phase alternating current having a desired frequency to be supplied to a load. A bridge drive circuit is responsive to the synchronizing signal from the synchronizing signal-forming circuit, for causing the pair of variable control bridge circuits to be alternately switched to operate every half a repetition period of the single-phase alternating current, to thereby cause the cycloconverter to generate the single-phase alternating current. An output voltage-detecting circuit detects an output voltage of the pair of variable control bridge circuits.

Abstract: Porous, absorbent macrostructures that comprise flexible interparticle bonded aggregates and are useful in absorbent articles such as diapers, adult incontinence pads, and sanitary napkins are disclosed. These porous macrostructures are treated with an effective amount of a latex to coat at least a portion of the particles comprising the bonded aggregate so as to impart increased flexibility to the macrostruture. This latex is capable of being sintered at a temperature of about 25.degree. C. or lower, is at least somewhat hydrophilic when sintered, and has a Tg of about 25.degree. C. or lower when sintered.

Abstract: A control system for an internal combustion engine having a pressurized gaseous fuel source, a control valve for regulating the amount of gaseous fuel supplied from the pressurized gaseous fuel source, and an intake passage in which the gaseous fuel, the amount of which has been regulated by the control valve, is mixed with intake air and supplied to the engine as an air-fuel mixture. An ECU of the control system controls the air-fuel ratio of the air-fuel mixture to be supplied to the engine by regulating the amount of the gaseous fuel through the control valve, and various sensors detect operating conditions of the engine. The ignition timing of the engine is calculated based on the detected operating conditions, and when the air-fuel ratio of the air-fuel mixture is in a predetermined lean limit region, the output of the engine is controlled by correcting the ignition timing.

Abstract: A portable power unit has a protective circuit for cutting off an output current from the power unit when the power unit is in an overload state. An amount of the output current is detected. An output voltage from the power unit is reduced when the amount of the output current detected reaches a first threshold value, thereby preventing the protective circuit from undesirably operating for one power unit when it is connected for another for parallel operation. When the amount of the output current decreases to a second threshold value which is smaller than the first threshold value, with the power unit being in a state in which the output voltage is reduced, the voltage-reducing operation is canceled.

Abstract: An invertor-controlled generator unit is connectible with at least one other generator for parallel operation. The invertor-controlled generator has an invertor circuit which performs switching operation to convert a direct current power into an alternating current power based on a reference sinusoidal signal. Voltage and current of the alternating current power from the invertor circuit are detected. A difference in phase between the detected voltage and current is detected, and a signal indicative of the phase difference is formed. A reference pulse signal is formed in response to the signal indicative of the phase difference for varying the frequency of the signal indicative of the target output waveform in a manner such that the phase difference is decreased.

Abstract: An invertor-controlled power unit includes an invertor circuit which performs switching control of direct current output from a direct current power source circuit in response to a driving signal. A bridge balanced circuit is connected to a pair of output lines extending from an output circuit of the power unit. The bridge balanced circuit has at least two balanced points and comprises a plurality of impedance elements connected to the pair of output lines. One of the balanced points is grounded. A potential difference between the one of the balanced points and another of same is detected, and a detection signal indicative of the potential difference is produced. When the detection signal falls outside a predetermined range, i.e. it is determined that a leak occurs, a stoppage instruction signal is produced to stop the supply of the driving signal to the invertor circuit.

Abstract: An invertor-controlled power unit includes a direct current power source circuit, an invertor circuit, and a pair of output lines. A waveform of voltage appearing between the output lines is detected. There is generated a target output waveform signal having a predetermined frequency. The target output waveform signal is converted into a control signal, which is then supplied to the invertor circuit. The invertor circuit effects switching control of an output from the direct current power source circuit in response to the control signal. There is detected an overvoltage state of the direct current power source circuit. The generation or supply of the control signal is inhibited while there is detected the overvoltage state of the direct current power source circuit. The control signal starts to be supplied again to the invertor circuit at a timing at which the detected waveform of the voltage between the output lines crosses a substantially zero volt level.

Abstract: An invertor device for an AC power unit. In one form of the invention, a sine wave signal having a predetermined frequency is superposed on a triangular wave signal having a frequency higher than the predetermined frequency to form a superposed signal. A pulse width modulating circuit having a predetermined fixed threshold level amplifies the superposed signal with reference to the predetermined fixed threshold level to generate a pulse width modulalted signal. A switching device performs switching control of an output from a DC power source circuit based on the pulse width modulated signal to output an AC power having the predetermined frequency via an output circuit. In another form of the invention, a difference between waveforms of output AC voltages appearing at output terminals of the output circuit is detected to generate a signal representing the difference.

Abstract: In a power unit, an output current supplied from the power unit to a load device is constantly detected as a load current. When the detected load current exceeds a predetermined current value, output power supplied from the power unit to the load device is reduced or cut off. An output voltage supplied from the power unit to the load device is constantly detected. When the detected output voltage has continued to be lower than a predetermined voltage value over a predetermined time period, the output power is reduced or cut off.

Abstract: A portable generator capable of automatically adapting itself to parallel operation of a plurality of generators including the present generator. A voltage detector and a current detector generate a voltage signal and a current signal respectively indicative of detected voltage and current of an AC output from the portable generator. A phase difference detector generates a signal indicative of a phase difference between the detected voltage and current. An oscillator has its output frequency controlled by the signal indicative of the phase difference. A target output waveform signal in the form of a sine wave signal is formed, which has a frequency corresponding to the output frequency of the oscillator. The target output waveform signal and the voltage signal are mixed at a variable ratio. At the start of the generator, the voltage signal takes precedence over the target output waveform signal to thereby cause an invertor circuit to effect switching control based on the voltage signal.

Abstract: A portable engine generator includes an overcurrent detector which detects load current to determine whether the engine is in an overcurrent state. A voltage detector detects output voltage from the engine generator. A timer circuit starts to operate when the overcurrent state is detected by the overcurrent detector and continues to operate while the overcurrent state continues to be detected. The timer circuit starts to output a signal for interrupting the supply of output power when a predetermined time period has elapsed after the start of operation thereof. The predetermined time period is set to a shorter time period as the output voltage detected by the voltage detector assumes a lower value.

Abstract: A pulse width modulation type invertor device for an AC power unit. In one form of the invention, a waveform detecting circuit detects an waveform of an output alternating current in an output circuit of the invertor device, and a correcting circuit forms a feedback signal indicative of portions of the waveform of the output alternating current which are outside a predetermined range of amplitude, and compares the feedback signal with a sine wave reference signal to amplify a difference between the feedback signal and the sine wave reference signal. A pulse width modulating circuit is responsive to an output from the correcting circuit for forming a pulse width modulated signal.

Abstract: An electromagnetic actuator for use with a fuel injection pump, for example, has a position detector for detecting the operating position of a plunger which is axially movable.

Abstract: An engine speed control apparatus controls the rotational speed of an engine when the engine is overloaded.

Abstract: A pulse width-modulation control device includes a superposed signal creating circuit for superposing a sine wave signal having a predetermined frequency upon a triangular wave signal as a carrier signal, having a frequency higher than the predetermined frequency to form a superposed signal. A pulse width modulating circuit compares the superposed signal with a predetermined threshold level to form a pulse width modulated signal. A pulse width limiting circuit limits the pulse width of the pulse width modulated signal when the pulse width modulated signal has a pulse width lying outside a predetermined range, and supplies a pulse signal having a pulse width thus limited to a switching device.