Prime-mover dynamo plants – Electric control – Engine control
Reexamination Certificate
2006-05-02
2006-05-02
Waks, Joseph (Department: 2834)
Prime-mover dynamo plants
Electric control
Engine control
C318S438000, C307S127000
Reexamination Certificate
active
07038329
ABSTRACT:
A prime mover (28) in a heat recovery system drives an induction generator (8) which feeds power to a utility grid (9) through a breaker (10) but also powers a load including auxiliary induction motors (11, 12). To provide acceptable waveform and power factor, the auxiliary equipment is driven through IGBT switched bridge converters (13) by DC voltage (15) generated by an IGBT switched bridge converter (13a), instead of three-phase diode rectifiers (16). The switched bridge converter controller (14a) is responsive to a system process controller (23a) which causes the switched bridge controller (13a) to be driven in response to the voltage (26) and current (27) on the generator bus (17). This eliminates the need for harmonic filters (18) and power factor capacitors (20) while improving the quality of the power generated. The controller (23a) trips the breaker if the voltage, frequency or power factor is out of limits.
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Fredette Steven J.
Grover Rishi
UTC Power LLC
Waks Joseph
Williams M. P.
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