Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1982-03-31
1984-06-05
Wong, Peter S.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 57, 363 96, 323209, H02M 7515
Patent
active
044532075
ABSTRACT:
The DC to AC power inverter is of the class B, C, D or E type and includes a battery, at least one power SCR and associated capacitor circuitry, at least one input winding on a main transformer core and at least one output secondary winding on the transformer core. Such inverter requires a quiescent current to establish operating current for capacitor commutation charge and includes a feedback loading circuit for feeding current generated by the quiescent current back to the battery. The inverter also includes a self-detecting load demand circuit coupled to a line from said output winding for cyclically energizing the inverter, for sensing a minimum AC load and for holding said inverter in an energized state until less than a minimum AC load is sensed during an energizing cycle. Further the invention includes automatic power factor correction circuitry for supplying full time leading power factor correction to a load, with the automatic power factor correction circuitry being sensitive to light reactive loads.
REFERENCES:
patent: 3452266 (1969-06-01), Borden et al.
patent: 3605003 (1971-09-01), Guggi
patent: 3784893 (1974-01-01), Rando
patent: 3805141 (1974-04-01), Pompa, Jr. et al.
patent: 4063301 (1977-12-01), Lye
patent: 4317076 (1982-02-01), Price
Best Energy Systems For Tomorrow, Inc.
Piontek Michael
Wong Peter S.
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