Digital speed controller using a single-chip microcontroller

Details Digital speed controller using a single-chip microcontroller Digital speed controller using a single-chip microcontroller

1987-12-21

1989-07-04

MacDonald, Allen

Boots, shoes, and leggings

364182, 364183, 364565, 318603, 377 17, 388810, 388814, 388912, 388933, G05B 101, G05B 1100

Patent

active

048456080

ABSTRACT:
A speed regulator digital speed controller for rotating machinery is comprised of a single-chip microcontroller operating in conjunction with a multiple counter/time peripheral, and is programmed in a high level language. Pulses are generated by a digital speed sensor at a rate too low to give the required speed resolution; these pulses are counted and a preset number toggles a binary gate signal. Two clock counters both having an input connected to a high reference frequency oscillator are gated alternately and accumulate a count depending on the length of the gated on interval. These speed related counts are read during alternating gated off intervals into the microcontroller where the speed error is calculated in real time to a high degree of accuracy and resolution. The speed of an electric motor and a steam turbine, for instance, are regulated.

REFERENCES:
patent: 4129862 (1978-12-01), Kaplan et al.
patent: 4335600 (1982-06-01), Wu et al.
patent: 4408118 (1983-10-01), Grozinger et al.
patent: 4649511 (1987-03-01), Gdula
patent: 4710688 (1987-12-01), Neki et al.

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