Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Patent
1992-04-22
1993-10-19
Shoop, Jr., William M.
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
318446, 318459, 318479, G05B 500
Patent
active
052549178
ABSTRACT:
A direct current motor driving device for driving a direct current motor having a plus terminal and a minus terminal, which comprises a direct current source having a plus terminal and a minus terminal, the plus terminal being connected to the plus terminal of the direct current motor, pulse generating device for generating a pulse signal when an input signal to an input terminal of the pulse generating device exceeds a set threshold value, driving device for driving the direct current motor in response to the pulse signal outputted by the pulse generating means, and a first resistance type voltage dividing circuit inserted between the minus terminal of the direct current source and a minus terminal of the direct current motor for providing as the input signal to the pulse generating device a voltage signal produced by resistance-dividing a voltage between these terminals in a first ratio, whereby a counter electromotive force generated by the direct current motor by the rotation of the direct current motor by an external force in a direction opposite to its driving rotational direction is added to a source voltage of the direct current source to be supplied to the first resistance type voltage dividing circuit, the voltage signal of the first resistance type voltage dividing circuit is increased to exceed the set threshold value of the pulse generating device, and the pulse signal is generated by the pulse generating device to actuate the direct current motor. The direct current motor driving device enables direct current motors for general-purposes to be actuated and stopped without the use of power switches.
REFERENCES:
patent: 3728604 (1973-04-01), Grygera
patent: 4085356 (1978-04-01), Meinema
patent: 4396876 (1983-08-01), Tojika et al.
Martin D.
Shoop Jr. William M.
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