Digital pulse generator for controlled thyristor switches and mo

Details Digital pulse generator for controlled thyristor switches and mo Digital pulse generator for controlled thyristor switches and mo

1987-04-16

1988-09-13

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

323244, H02P 540

Patent

active

047712244

ABSTRACT:
In a microcomputer-based multi-function thyristor-controlled AC induction motor drive, the microcomputer effectuates the several control functions of the motor drive during respective time intervals corresponding to the sequence of firing of the thyristors, and upon each new time interval, depending upon the required delay angle, firing is effected as a function of a residual angle in terms of a multiple of said time intervals, and the firing sequence is shifted by an amount of time intervals in relation to the integer number of such time intervals within such delay angle. As a result, firing of the thyristor is performed by the microcomputer without impeding control function determination and with improved response to change in the delay angle.

REFERENCES:
patent: 3611097 (1971-10-01), Joslyn
patent: 4063146 (1977-12-01), Oliver

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