Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1979-02-14
1981-02-24
Dobeck, B.
Electricity: motive power systems
Open-loop stepping motor control systems
318685, G05B 1940
Patent
active
042530520
ABSTRACT:
The circuit is for driving motors in which there is access to all the ends of the motor winding sections. The circuit is of the type having a set of drive circuit units connected together as a gang in parallel between power source terminals. Each unit includes in series a winding section and a transistor control switch. There is additionally provided an auxiliary circuit with an auxiliary winding and resistor combination which substantially matches the motor winding and resistor combination impedance. The auxiliary winding is used to store the energy from a motor winding section when it is turned off and then to supply the energy to the next motor winding section to be turned on, thus reducing the driving energy needed for the motor and also reducing the current rise and fall times in the windings.
REFERENCES:
patent: 3486096 (1969-12-01), Van Cleave
patent: 3560821 (1971-02-01), Beling
patent: 3684934 (1972-08-01), Loyzim
patent: 3826966 (1974-07-01), Nagasaka et al.
patent: 4127801 (1978-11-01), Leenhouts
patent: 4164697 (1979-08-01), Everett
"The Stepping Motor Handbook", published by Sigma Instruments, Inc., Braintree, Mass., U.S.A., (copy 1972), German Edition, 1973.
A.G. fur Industrielle Elektronik AGIE Losone bei Locarno
Dobeck B.
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