Abstract: A grid-type engine generator apparatus which can prevent reduction in the operational efficiency due to the stop motion of an engine at the cancellation of the interconnection and minimize loads exerted on the startup device for the engine. A network protector is provided for generating a fault signal when detecting a fault on the network source. Upon receiving the fault signal, an interconnection relay is opened to cancel the interconnection and simultaneously, a timer is started. The cancellation permits the engine to run with no load. When the fault signal is maintained until the setting duration of the timer is timed up, a time-out signal is released to stop the engine. On the other hand, when the fault signal is eliminated by canceling the cause of the fault before the setting duration of the timer is passed, the interconnection relay is closed to establish the interconnection again and the timer is reset.

Abstract: A generator apparatus such as in a cogeneration system has a controlling power supply energized with its generator output with giving no adverse effect on the waveform of its output. An inverter 13 is provided for converting an alternating current output of the engine generator 10 into a direct current and returning back by the action of its inverter circuit 133 to an alternating current of a predetermined frequency which is then connected to a power supply system 14. While the engine 11 remains not actuated, a power received from a joint between the inverter 13 and the power supply system 14 is rectified by a rectifier 141 and transferred to the controlling power supply 140. When the engine 11 is started, the power at the input of the inverter circuit 133 is transmitted to the controlling power supply 140.

Abstract: A fault on the generator can be detected with the use of a simple arrangement. The output of the generator 12 which has multi-phase winding and is driven by an engine 11 is rectified and then converted by an inverter 133 into an alternating current at the frequency of a system before interconnected to the source of the system. After the engine 11 is started, the direct current voltage Vdc is monitored with a first fault monitor 40. When the direct current voltage Vdc rises up to a predetermined level, a connector relay 135 is closed. As the output of the inverter 133 is increased, the interconnection with the system source is enabled. After the interconnection, the direct current voltage and the output of the inverter are monitored with a second fault monitor 43. If the direct current voltage drops down to below the predetermined level before the output of the inverter reaches a rated level, the canceling and re-interconnection is repeated.

Abstract: This can prevent declination in the operational efficiency due to the stop motion of an engine at the cancellation of the interconnection and minimize loads exerted on the startup device for the engine. A system protector 138 is provided for generating a fault signal when detecting a fault on the system source. Upon receiving the fault signal, an interconnection relay 135 is opened to cancel the interconnection and simultaneously, a timer 39 is started. The cancellation permits the engine 11 to run with no load. When the fault signal is maintained until the setting duration of the timer 39 is timed up, a time-out signal is released to stop the engine 11. On the other hand, when the fault signal is eliminated by canceling the cause of the fault before the setting duration of the timer 39 is passed, the interconnection relay 135 is closed to establish the interconnection again and the timer 39 is reset.

Abstract: A motor with a gear reducer includes a housing, a stator secured to the housing and having an inner periphery thereof defining a central space therein, and a rotor formed of a magnet material and rotatably fitted in the central space of the stator. The rotor has an axial through hole formed therein in coaxial relation to an axis of rotation of the rotor. An output shaft is connected through a gear reducer to the rotor to be rotatively driven thereby, for outputting a rotating output from the rotor through the gear reducer. The output shaft extends through the axial through hole of the rotor and is rotatably supported by opposite ends of the housing. The rotor has a gear forming part of the gear reducer formed thereon at one end thereof, and a hook formed thereon at another end thereof and engageable with a moving device such as an assembly jig in an axial direction of the output shaft.

Abstract: An electric wheel motor mounted integrally in a wheel has at least one electric leader line extending from the inside of a motor main body of the motor to the outside thereof. A breather passage is provided in the at least one electric leader line and communicates the inside of the motor main body with the outside thereof.

Abstract: A wheel motor for a vehicle is provided in which an electric motor is arranged in a central space defined in a wheel, to rotatably drive the wheel. A gear reducer is also arranged in the central space of the wheel, which has a plurality of gears including a final stage gear having an axial through hole formed therein. The electric motor includes a housing fixed to the vehicle body, a stator secured to the housing, a rotor rotatably fitted in a central space defined in the stator to generate the rotative driving force during rotation thereof, and an output shaft connected to the rotor through the gear reducer as well as to the wheel to be rotatively driven by the rotor, for transmitting the rotating output from the rotor through the gear reducer to the wheel. The output shaft extends through an axial through hole formed in the final stage gear of the gear reducer and an axial through hole formed in the rotor, and is rotatably supported by opposite end portions of the housing.

Abstract: A wheel motor for a vehicle has an electric motor which is arranged in a central space defined in a wheel, to rotatively drive the wheel. A gear reducer is also arranged in the central space of the wheel. The electric motor includes a housing fixed to the vehicle body, a stator secured to the housing, a rotor rotatably fitted in a central space defined in the stator to generate the rotative driving force during rotation thereof, and an output shaft connected through the gear reducer to the rotor to be rotatively driven thereby, for transmitting the rotating output from the rotor through the gear reducer to the wheel. The output shaft extends through an axial through hole formed in the final stage gear of the gear reducer and an axial through hole formed in the rotor, and is rotatably supported by opposite end portions of the housing. An electric circuit for driving the electric motor is arranged in the central space of the wheel, together with the electric motor.

Abstract: An operation controlling apparatus for a passenger operated machine such as a tractor, snowmobile or the like. The apparatus includes an engine cut-off mechanism which terminates engine operation if an operator is expelled from the machine seat for a pre-determined time. Relatively short, intermittent periods of displacement of an operator from the seat, such as when travelling over rough or bumpy terrain, will not terminate engine operation. After emergency engine stoppage, the apparatus requires the machine be placed in a start waiting state, for instance by disengaging the clutch or when the transmission is placed in neutral, before the engine can be re-started.

Abstract: A control device in a mower in which an engine output is transmitted to a cutter blade through a coupling of a clutch for performing mowing. A blade engagement switch is provided for sending a drive signal for engaging the cutter blade. A first control device receives the signal and electrically increases a degree of opening of a throttle valve of the engine. A second control device is provided for electrially performing coupling and decoupling of the clutch. A first timer circuit actuates the first control device a predetermined period upon closure of the blade engagement switch. A second timer circuit actuates the second control device to provide coupling of the clutch at a predetermined timing within the predetermined period after closure of the blade engagement switch.