Abstract: The purpose is to provide an engine generator 1 which can reduce noise and performs cooling efficiently. In the engine generator 1 having an engine 2, a generator 3, a cover 4 and a muffler box 13, external openings 412 and 414 formed in the cover 4 for sucking outside air into the cover 4 and intake ducts 7 for introducing the air sucked via the external opening 412 and 414 into the inside of the cover 4. An opening 71 is formed in the upper side of each of the intake duct 7, and the intake duct 7 is arranged along the side surface of the muffler box 13 and below the upper surface of the muffler box 13 for a predetermined distance. A sponge 17 is provided between the upper side of the intake duct 7 and the side surface of the muffler box 13 so as to cover a part of the opening 71. An air passage 18 is formed above the intake duct 7 by the side surface of the muffler box 13 and the sponge 17.

Abstract: The purpose is to provide an engine generator 1 which can reduce noise and performs cooling efficiently. In the engine generator 1 having an engine 2, a generator 3, a cover 4 and a muffler box 13, external openings 412 and 414 formed in the cover 4 for sucking outside air into the cover 4 and intake ducts 7 for introducing the air sucked via the external opening 412 and 414 into the inside of the cover 4. An opening 71 is formed in the upper side of each of the intake duct 7, and the intake duct 7 is arranged along the side surface of the muffler box 13 and below the upper surface of the muffler box 13 for a predetermined distance. A sponge 17 is provided between the upper side of the intake duct 7 and the side surface of the muffler box 13 so as to cover a part of the opening 71. An air passage 18 is formed above the intake duct 7 by the side surface of the muffler box 13 and the sponge 17.

Abstract: A control circuit (microcomputer) is provided in each of two inverter portions. Magnitude of a target waveform signal corresponding to a voltage to be output by each of the inverter portions is varied according to an operation state. The number of revolution of the engine is adjusted according to the larger one of the effective powers output from the two inverter portions. To cope with a temporary output shortage from the AC generator, the output voltage is temporarily lowered and then the output voltage is restored after waiting for the number of revolution of the engine increases.

Abstract: An apparatus for controlling the operation of power conditioners (10) for supplying the generated power to an external power system such as a commercial power system, in which power conditioners (10) are interconnected to an external power system, the power conditioners (10) are interconnected through information exchange means, at least one of the power conditioners (10) monitors the reverse power flow, and the power conditioners (10) exchange the monitor information with information of the other power conditioners (10), thereby equalizing the outputs of all the power conditioners (10). A generator (42) has armature windings (60), and an inverter circuit (13) of the power conditioner (10) provided for each of the armature windings (60) is controlled by cable or radio.

Abstract: Each power source switching unit (8) of a electric power system (1) constituted of a power operating system having a power generator (3) driven by an external power source (40) and an engine (4) is constituted of a means for sensing information on a selected power source and supply power in time series, calculating a supply power quantity every power source on the basis of sense data, and storing these sensing and calculated data. This power source switching unit (8), disposed every power load group, comprises a means for communication with another power source switching unit (8). A power source management system, constituted of the power source switching unit (8), comprises a means for transmitting the sensed data or calculated data of each power source switching unit (8) to the control system of the power generating system, a means for receiving data transmitted from the power source management system, and an image display means for displaying the received data by graphing.

Abstract: A control unit (5) for controlling each device which constitutes a electric power generator set (1) is provided with an operation-and-display device (28) so constituted as to calculate each electric power value data and each electric energy data on external electric power, generated electric power, and load electric power on the basis of sensed data on each value of external electric power and generated electric power transmitted from inverters (6a, 6b) and as to store these calculated data and the sensed data, and connected to the electric power generator set (1) by wires or radio.

Abstract: Each power source switching unit (8) of a electric power system (1) constituted of a power operating system having a power generator (3) driven by an external power source (40) and an engine (4) is constituted of a means for sensing information on a selected power source and supply power in time series, calculating a supply power quantity every power source on the basis of sense data, and storing these sensing and calculated data. This power source switching unit (8), disposed every power load group, comprises a means for communication with another power source switching unit (8). A power source management system, constituted of the power source switching unit (8), comprises a means for transmitting the sensed data or calculated data of each power source switching unit (8) to the control system of the power generating system, a means for receiving data transmitted from the power source management system, and an image display means for displaying the received data by graphing.

Abstract: A control unit (5) for controlling each device which constitutes a electric power generator set (1) is provided with an operation-and-display device (28) so constituted as to calculate each electric power value data and each electric energy data on external electric power, generated electric power, and load electric power on the basis of sensed data on each value of external electric power and generated electric power transmitted from inverters (6a, 6b) and as to store these calculated data and the sensed data, and connected to the electric power generator set (1) by wires or radio.

Abstract: An apparatus for controlling the operation of power conditioners (10) for supplying the generated power to an external power system such as a commercial power system, in which power conditioners (10) are interconnected to an external power system, the power conditioners (10) are interconnected through information exchange means, at least one of the power conditioners (10) monitors the reverse power flow, and the power conditioners (10) exchange the monitor information with information of the other power conditioners (10), thereby equalizing the outputs of all the power conditioners (10). A generator (42) has armature windings (60), and an inverter circuit (13) of the power conditioner (10) provided for each of the armature windings (60) is controlled by cable or radio.