Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1975-09-11
1977-12-13
Beha, Jr., William H.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 41, 363 72, 363 43, H02P 1320
Patent
active
040631435
ABSTRACT:
An inverter arrangement comprising two controlled three-phase inverters is disclosed. The inputs of these inverters are preferably connected to a common DC voltage source, while the output voltages delivered by the inverters are of rectangular waveshape and are added together by means of transformers to form resultant output voltages. In accord with the invention, in order to obtain resultant output voltages whose harmonics are of orders which do not change when voltage control is applied, all the output inverter voltages are caused to comprise in each period a positive and a negative voltage pulse, each of which pulses has breaks or no-voltage intervals of controllable width positioned at predefined places within the pulse.
REFERENCES:
patent: 3324374 (1967-06-01), Corey
patent: 3609507 (1971-09-01), Beck
patent: 3611086 (1971-10-01), Mokrytzki et al.
patent: 3781615 (1973-12-01), Mokrytzki et al.
patent: 3781616 (1973-12-01), Mokrytzki et al.
Beha Jr. William H.
Siemens Aktiengesellschaft
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