Abstract: A DPF system for an engine generator that performing a recovery process on a filter (DPF) provided to remove particulate matter generated by combustion of fuel when an amount of the particulate matter in the DPF exceeds a predetermined value, the engine generator performing the recovery process by carrying out an automatic recovery operation to raise a temperature of exhaust gas to combust the particulate matter, the system comprising: a dummy load connected to the engine generator when necessary; and control device for allowing the engine to perform a recovery preparation operation in such a manner that, once the amount of the particulate matter exceeds the predetermined value, the recovery operation is performed when the temperature of exhaust gas reaches a reference temperature, and the dummy load is connected to the generator to raise the temperature of exhaust gas when the temperature thereof fails to reach the reference temperature.

Abstract: A DPF system for an engine generator that performing a recovery process on a filter (DPF) provided to remove particulate matter generated by combustion of fuel when an amount of the particulate matter in the DPF exceeds a predetermined value, the engine generator performing the recovery process by carrying out an automatic recovery operation to raise a temperature of exhaust gas to combust the particulate matter, the system comprising: a dummy load connected to the engine generator when necessary; and control device for allowing the engine to perform a recovery preparation operation in such a manner that, once the amount of the particulate matter exceeds the predetermined value, the recovery operation is performed when the temperature of exhaust gas reaches a reference temperature, and the dummy load is connected to the generator to raise the temperature of exhaust gas when the temperature thereof fails to reach the reference temperature.

Abstract: An automatic voltage regulator of a generator with a function for suppressing an overshoot which regulator keeps an output voltage at a predetermined voltage by controlling exciting currents of the generator with turning a switching device on and off, and comprises a voltage detection means for detecting the output voltage of the generator; a deviation calculation means for calculating a deviation for a target with respect to a detected detection voltage; an integral-value calculation means for calculating an integral value of the deviation; and a pulse signal calculation means for calculating the pulse width based on an integral coefficient, a proportional coefficient, the deviation, and its integral value, and for outputting said pulse width as a pulse signal, wherein when before voltage establishment the detection voltage is not less than the first reference voltage, the target voltage is replaced with the set voltage; and wherein the switching device inputs the pulse signal calculated by the pulse signal

Abstract: An apparatus for calculating an effective voltage is provided, which includes a voltage reducer, an analogue to digital converter, a first detector, a second detector and a calculator. The voltage reducer steps down instantaneous output voltages of a generator. The analogue to digital converter converts each analogue signal of the instantaneous output voltages into a digital signal. The first detector detects a first signal of digitized instantaneous output voltage. The second detector detects a second signal, which differs in terms of phase by 120 deg. from the first signal. The calculator calculates an effective voltage according to the first and second signals, by executing a calculation with an expression: E={2(Va2+VaVb+Vb2)/3}1/2, where E represents the effective voltage, Va the first signal of instantaneous output voltage and Vb the second signal, respectively.