Pulse width modulation method for triggering analog actuators

Details Pulse width modulation method for triggering analog actuators Pulse width modulation method for triggering analog actuators

1994-11-28

1996-10-01

Grimm, Siegfried H.

Modulators

Pulse or interrupted continuous wave modulator

Pulse width modulator

327172, 327175, 327291, 375238, H03K 708

Patent

active

055614027

ABSTRACT:
For triggering analog actuators with pulse-width modulation, a pulse duty factor (TV) is specified as relative ratio of pulse time (t.sub.PU) to period duration (T) of a triggering period. An add value (AW) is defined as product of the specified pulse duty factor (TV) and a maximum add value (AMW). Adding steps with specific cycle time (t.sub.z) and specified add value (AW) in each case follow one another successively. In an adding step, the add value (AW) is added, using an adding element with memory function and overflow detection, to the value stored in the adding element. The result of the adding operation is stored as a new memory value in the adding element. The logic state at the output of the adding element is defined by the overflow that occurs in the adding step, and the actuator is triggered according to the respective logic state at the output of the adding element.

REFERENCES:
patent: 3654450 (1972-04-01), Webb
patent: 4754466 (1988-06-01), McCambridge
patent: 5053729 (1991-10-01), Babii
G. Turinsky: "Impulsbreitenmodulation mit B 555 D". In: radio fernsehen elektronik, Berlin 35, 1986, 1, pp. 56-57.
M. Heiss: "Pulsanzahlmodulator statt Pulsbreitenmodulator zur Verbesserung der Reglerdynamik". In: at-Automatisierungstechnik 41, 1993, 11, pp. 428-432.

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