Microcomputer control of stepper motor using reduced number of p

Details Microcomputer control of stepper motor using reduced number of p Microcomputer control of stepper motor using reduced number of p

1988-03-28

1989-07-11

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, 318432, 363124, H02P 800

Patent

active

048475440

ABSTRACT:
A stepper motor control circuit having a reduced number of discrete components is provided by using an on-chip analog to digital converter of a single chip microcomputer to control the waveforms of chopped winding currents. Four power MOSFET's, four diodes and two sense resistors can be added to the circuitry of a board populated by the single chip microcomputer to implement a full step motor controller. The addition of a holding current circuit frees the computer for servicing other tasks when the motor is idle.

REFERENCES:
patent: 4336484 (1982-06-01), Marinko
patent: 4433370 (1984-02-01), Karadsheh et al.
patent: 4607196 (1986-08-01), Abrahams et al.
Hansen Manufacturing Company Application Note, Mar. 1984, entitled "Application and Evaluation of RIFA PBL 3717 and Unitrode UC 3717 Stepper Motor Drive Circuit and IMC/Hansen Stepper Motors".
Electronic Design, Apr. 1987 edition, pp. 81-84, "One Chip Computer Shrinks Size and Part Count of Stepping-Motor Controller".
Hansen Manufacturing Company, May 1983, Application Note entitled "Application and Evaluation of Sprague UCN-4202A and UCN-4203A Stepper Motor Translator/Drivers and IMC/Hansen Stepper Motors".
RIFA Data Sheet, Apr. 1986, entitled "High Performance Stepper Motor Driver (PBL 3770)".

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