Stepper motor driver circuit

Details Stepper motor driver circuit Stepper motor driver circuit

1992-03-26

1993-07-06

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

052257568

ABSTRACT:
A stepper motor driver circuit applies charging current to one phase of a two-phase stepper motor in a Sine wave configuration while simultaneously applying charging current to the opposing winding in a Cosine wave configuration to carefully control the position of the motor. To reduce memory storage requirements and therefore reduce size and cost, only quarter of the Sine and Cosine waveforms are stored in memory and with additional circuitry, reconstruction of the complete wave form is realized. Furthermore, the resulting circuitry provides the user with a Full Step position output thereby reducing the need for the controlling microprocessor to count micro-steps over long moves to monitor the motor position.

REFERENCES:
patent: 4297625 (1981-10-01), Newell
patent: 4703243 (1987-10-01), Ettelman et al.
patent: 4710691 (1987-12-01), Bergstrom et al.
patent: 4855660 (1989-08-01), Wright et al.
Docket IMS-1 entitled "Stepper Motor Driver Circuit" filed Mar. 10, 1991, David J. Coutu.

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