Pulse or digital communications – Repeaters – Testing
Patent
1985-03-08
1986-10-14
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
332 9R, 318345E, 363 41, H03K 708, H02M 7217, H02P 506
Patent
active
046176756
ABSTRACT:
Plural series of digital pattern data are determined by PWMing a sine wave by a triangular wave and further classified into each series by the number of triangles included within a half cycle of the sine wave. An appropriate series of data are selected according to a frequency command. The selected data are further adjusted in response to a voltage control command. On the basis of the selected and adjusted pattern data and in response to a half period signal of triangular wave and triangle slope signals, a PWMed pulse is generated through a logical circuit. In the case where the generator is incorporated with an induction motor driving system, it is possible to control speed (frequency), torque (voltage), rotational directions, and torque fluctuations (phase difference) of an induction motor accurately at high response speed.
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patent: 4371819 (1983-02-01), Kaufmann
patent: 4459534 (1984-07-01), Nayase et al.
patent: 4502024 (1985-02-01), Nishikawa et al.
patent: 4562524 (1985-12-01), Mutoh et al.
IEEE Proceedings-Part B, vol. 128, No. 6, Nov. 1981-"Microprocessor Control of PWM Inverters" pp. 293-305.
IEEE Proceedings on Industrial Electronics, vol. 1E-29, No. 1, Feb. 1982, "Microprocessor Based Sinusoidal PWM Inverter by DMA Transfer pp. 46-51.
Siemens-Zeitschrift, vol. 45, No. 10, 1971 pp. 761-764.
Regelgungstechnik, vol. 27, No. 12, Dec. 1979 pp. 379-386.
Siemens-Forsch-U. Entwicklbericht, vol. 1, No. 1, 1972 pp. 184-193.
Ashikaga Tadashi
Fushimi Keiko
Kamanaka Yoshihide
Kabushiki Kaisha Meidensha
Safourek Benedict V.
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