Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1987-10-23
1989-05-23
Beha, Jr., William H.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
318811, 363 37, H02M 748
Patent
active
048335860
ABSTRACT:
A pulse generator (including a microcomputer) for supplying a pulse pattern to semiconductor devices of a power converter (such as an inverter or a converter) using the pulse width control scheme is provided with function of dropping pulses so that the pulse pattern may form a predetermined function provided that the pulse width is shorter than a limit value (Limit). As a result, the input and output waveforms of the power converter can be made sinusoidal and can be released from the constraint of the minimum pulse width of power conversion semiconductor devices.
REFERENCES:
patent: 4377779 (1983-03-01), Plunkett
patent: 4672520 (1987-06-01), Ueda et al.
Grant et al., "Technique for Pulse Dropping in Pulse-Width Modulated Inverters", IEE Proc., vol. 128, Pt. B, No. 1, pp. 67-72 (Jan. 1981).
Ando Takeki
Inaba Hiromi
Kurosawa Toshiaki
Mitsui Nobuo
Shima Seiya
Beha Jr. William H.
Hitachi , Ltd.
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