System for regulating the mean current flowing through the load

Details System for regulating the mean current flowing through the load System for regulating the mean current flowing through the load

1990-06-15

1992-11-03

Yusko, Donald J.

Coded data generation or conversion

Bodily actuated code generator

323280, 363124, 1376362, G05F 144

Patent

active

051609282

ABSTRACT:
System for regulating the mean current flowing through a load (1), particularly an electric device controlling the phenomenon to be regulated, from initial variable control information (.alpha.), a DC voltage source (V.sub.alim) being provided for supplying this load, comprising: a measuring device (4) for permanently measuring the value of the variable information (.alpha.); a determination device (5, 6) for causing a mean theoretical current value to be applied to the load (1) to correspond to each value of the information (.alpha.); a further measuring device (7) for measuring the real DC voltage supplied by the supply voltage source; a computing device (8) for computing, from the determined value of the mean theoretical current and the measured value of the DC supply voltage, a theoretical value of the cyclic ratio (pwm) of a pre-determined fixed frequency square wave voltage signal; a generator (2) for generating a fixed frequency square wave voltage signal having the computed cyclic ratio, this signal being applied to the load; another measuring device (10) for measuring the real mean current flowing through the load; a comparator (11) for comparing the values of the real and theoretical mean currents and generating an error signal (.epsilon.); and a correcting device (9) for correcting the theoretical value of the cyclic ratio as a function of the error signal.

REFERENCES:
patent: 4284885 (1981-08-01), Swensen
patent: 4445541 (1984-05-01), Schmeil
patent: 4461320 (1984-07-01), Burbagli

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