An engine-driven generator includes an internal combustion engine, a permanent magnet alternator and an AC to AC converter. The output frequency and voltage of the permanent magnet alternator are largely dependent on engine speed and the alternator load. The AC to AC converter converts the speed-dependent alternating current developed by the alternator to another alternating current whose frequency and voltage are largely independent of engine speed. Voltage regulation is provided by varying the engine speed in accordance with the load current. Frequency regulation is provided by frequency dividing the alternator output by an integer divisor that varies in accordance with engine speed. Additional voltage regulation is provided by deleting selected cycles of the alternator output current as needed to maintain the RMS output voltage within predetermined limits.
申请公布号
US5376877(A)
申请公布日期
1994.12.27
申请号
US19920897380
申请日期
1992.06.11
申请人
GENERAC CORPORATION
发明人
KERN, ROBERT;RUEHLOW, GERALD;MCLEAN, GRAHAM;WHEELEY, MICHAEL;WEDEL, FRANK;KASTNER, MARK