Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1985-04-15
1986-04-01
Shoop, Jr., William M.
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318318, 318439, 318257, 318341, 318138, H02K 2900, H02P 516
Patent
active
045800820
ABSTRACT:
The direct-current motor comprises at least one field winding supplied intermittently with direct-current voltage in order to produce a driving torque by interaction with permanent-magnetic poles which rotate with respect to the winding. The electromotive force of induction produced in the winding by the relative rotation of the permanent-magnetic poles is detected by means of a voltage measurement during the time intervals which elapse when the winding is not energized. A low-speed signal is produced when the electromotive force is below a pre-established threshold in correlation with the desired speed-threshold value.
REFERENCES:
patent: 3343036 (1967-09-01), Steen
patent: 3346725 (1967-10-01), Allured et al.
patent: 3414791 (1968-12-01), Munson et al.
patent: 3611081 (1971-10-01), Watson
patent: 3745435 (1973-07-01), Futagawa et al.
patent: 3750000 (1973-07-01), Bruckner et al.
patent: 3813591 (1974-05-01), Dinger
patent: 3829749 (1974-08-01), Richt
patent: 3938014 (1976-02-01), Nakajima
patent: 4030005 (1977-06-01), Doemen
patent: 4070606 (1978-01-01), Morozumi et al.
patent: 4172990 (1979-10-01), Everett et al.
patent: 4262237 (1981-04-01), Gelenius
patent: 4446406 (1984-05-01), Uzuka
James B. Tiedemann, "Permanent-Magnet Motor Measures its own Speed", Electronics, vol. 40, p. 84, May 29, 1967.
Etudes Techniques et Representations Industrielles E.T.R.I.
Ip Shik Luen Paul
Shoop Jr. William M.
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