Abstract: A method includes determining an average set load corresponding to a plurality of gensets of a power system, generating a power error based on the determined average set load and a set load of a genset of the plurality, generating a first offset based on a function of the power error and a predetermined factor, determining a secondary offset, generating a final offset based on the first offset and the secondary offset, generating a final reference value based on a nominal reference and the final offset, and applying the final reference value to obtain proportional load sharing between the plurality of gensets.

Abstract: A power generation control device can include a switching circuit which controls an output of a generator. A periodical power charge control unit can be configured to allow the switching circuit to the operated in a zone including a combustion stroke of one cylinder of an internal combustion engine, and in an periodical power charge control range preset from in a zone which does not overlap a compression stroke of another cylinder of the internal combustion engine.

Abstract: A starting apparatus for an engine has a plurality of cylinders and an output shaft. The apparatus includes a power supply, an inverter having a switching element, a motor generator, an ECU, A crank angle sensor. The motor generator is coupled to the output shaft and connected to the power supply through the inverter. The ECU energizes the motor generator by controlling the inverter when the engine is started. The ECU causes ignition to occur in a specific cylinder that contains air-fuel mixture and is in an expansion stroke in an engine stopping state. The crank angle sensor indirectly detects a rotational speed of the motor generator. After the ignition caused, the ECU prohibits the motor generator from being energized until the rotational speed detected reaches or exceeds a predetermined value. As a result, the apparatus curbs an excessive increase in the temperature of a switching element.

Abstract: A vehicle motor-generator apparatus based on a field winding type of synchronous machine coupled to a power inverter and a battery, wherein the synchronous machine is controlled to operate as a motor to perform engine starting and thereafter be driven by the engine as an electrical generator, wherein during a short time interval at the commencement of engine starting, the armature winding of the synchronous machine is driven by a current such that magnetic flux is produced by the armature winding acting in the same direction as magnetic flux produced by the field winding, to thereby achieve increased torque during the time when maximum torque is required.

Abstract: A method and apparatus are disclosed for controlling a genset having an engine and an alternator in order to prevent an excessive change in a speed of the engine because of a sudden change in a load on the alternator. The method includes obtaining a first measured value of an actual AC output power of the alternator at a genset controller during a first time period, and obtaining a second measured value of the actual AC output power of the alternator at the genset controller during a second time period. The method further includes determining at the genset controller a first output power based upon at least the first measured value, and a second output power based upon at least the second measured value.

Abstract: An uninterruptible power supply system has standby and backup modes and can change to backup mode upon detection of a grid fault. In both modes an alternator rotates at synchronous-speed so that backup mode capability is ready. An energy storage unit through a DC-AC inverter remains coupled to the grid in standby mode so that it is charged, ready to supply power when changed to backup mode. In standby mode, first and third clutches are disengaged and engaged, transmitting alternator rotary motion to a flywheel but not therefrom to a heat engine. In backup mode, first and third clutch are engaged and disengaged to permit the alternator, via a second clutch, to overrun the flywheel and allow transmitting of flywheel torque to accelerate the heat engine to starting speed for driving the alternator to supply power to the grid after the engine is at operating speed and coupled to the alternator through a locked second clutch and an engaged third clutch.

Abstract: A generator apparatus driven by an internal combustion engine and comprising a revolution controller to control a revolution of the internal combustion engine so as to maintain a desired value of a terminal voltage of a battery which is charged by an output of an AC generator driven by the internal combustion engine while controlling an actuator for operating a fuel supply adjuster, an engine start controller to give a start instruction from a timer circuit to start means when the battery is discharged until the terminal voltage is lowered to a set value and an engine stop controller to give a stop instruction from the timer circuit to stop means when the battery is perfectly charged by the operation of the engine until the revolution of the engine is lowered to a stop revolution thereof whereby the starting and stopping operations of the engine are controlled without undercharging and overcharging the battery.

Abstract: There is provided a generator system for internal combustion engines, which can produce power efficiently at all times irrespective of the engine speed even for use in an internal combustion engine operated at variable speeds such as a vehicle engine. An AC generator electronic control unit (ACG.ECU) 3 determines a rotation speed N2 of a rotating electromagnetic field to be generated by a rotor 1R based on a mechanical rotation speed N1 of the rotor 1R in an alternator 1 such that the relative speed N of the rotating magnetic field to a stator 1S agrees with the maximum efficiency speed of rotation Nx. Then the ACG.ECU 3 sends the determined value to a rotating electromagnetic field controller 2a. The rotating electromagnetic field controller 2a controls phases of AC power to be supplied to a three-phase coil 11 of the rotor 1R to generate a rotating electromagnetic field with the rotation speed N2.