Air core gauge fixed voltage signal and variable pulse width mod

Details Air core gauge fixed voltage signal and variable pulse width mod Air core gauge fixed voltage signal and variable pulse width mod

1992-09-08

1994-03-22

Snow, Walter E.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural active motor elements

324140R, G01R 1136, G01P 348

Patent

active

052968049

ABSTRACT:
A pulse-width modulation system provides means for controlling dual-coil, air-core gauges over 360 degrees. The system moves a dial needle from one octant of the gauge to the next in response to coded data representing measurands by holding one coil at 100% duty cycle while applying a PWM of a varying duty signal to the other coil. When the magnitude of the measurand dictates that the needle should move into another octant of the dial, the PWM signal and the 100% duty cycle signal are interchanged between the coils in a manner permitting the needle to move to other octant of the dial.

REFERENCES:
patent: 5051688 (1991-09-01), Murase et al.

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