Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1981-02-26
1983-10-25
Truhe, J. V.
Electricity: motive power systems
Open-loop stepping motor control systems
318685, G05B 1940
Patent
active
044121660
ABSTRACT:
A stepper motor drive circuit is provided for preventing undesirable cross conduction on complementary winding drivers during switching. The circuit provides a current path from a source through at least one winding about a core in the motor; the path has two branches. There is a first switching device in the first of said branches switchable to conduction or non-conduction through the branch and a second switching device in the second of said branches switchable to conduction or non-conduction through the second branch. Sensing means, operative during the switching of said switching devices, sense the non-conductive state through the branch being turned off. Means responsive to the sensing by said sensing means of the non-conductive state, then switch the switching device in the branch being turned on to conduct current through said branch.
REFERENCES:
patent: 4072888 (1978-02-01), Bechtle et al.
patent: 4127801 (1978-11-01), Leenhouts
IBM Technical Disclosure Bulletin, Jan. 1980, vol. 22, No. 8A, p. 3048, "Timing Control for DC Motor Driver with Dynamic Braking", J. A. Bailey, R. G. Black, Jr., and V. Espinoza.
Crider Chester H.
Linton Charles R.
Bergmann Saul M.
International Business Machines - Corporation
Kraft J. B.
Truhe J. V.
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