Electricity: motive power systems – Braking – Dynamic braking
Patent
1999-04-05
2000-07-25
Martin, David
Electricity: motive power systems
Braking
Dynamic braking
318380, 318377, 318245, H02P 312
Patent
active
060940255
ABSTRACT:
An electric motor (10, 110, 210) is coupled to a TRIAC (16, 116, 216) for controlling the application of power to the motor from a power supply (13, 14; 113, 114; 213, 214) and a switch (18, 118, 215a) for controlled cut-off of the power supply. Upon operation of a switch (15b, 115b, 215b) for short-circuiting an armature (11, 111, 211) of the motor, power is supplied to field windings (12, 112, 212,) of the motor with at least one predetermined braking voltage. A braking period can be established following short-circuiting of the motor by (1) a prescribed delay, (2) comparing the changing voltage level across the TRIAC (16, 116) and cutting the power off when the voltage level rises to a prescribed level, or (3) monitoring the decreasing speed of the motor to cut off the power when the speed decreases below a prescribed level.
REFERENCES:
patent: 2784364 (1957-03-01), Gertin
patent: 2799818 (1957-07-01), Brown
patent: 3331004 (1967-07-01), Brown
patent: 3548276 (1970-12-01), Gross
patent: 3731149 (1973-05-01), Sherman et al.
patent: 3866098 (1975-02-01), Weiser
patent: 3872363 (1975-03-01), Gross
patent: 3897595 (1975-07-01), Fearno
patent: 4166240 (1979-08-01), Russell
patent: 4243919 (1981-01-01), Brown
patent: 4250436 (1981-02-01), Weissman
patent: 4388569 (1983-06-01), Shipaev et al.
patent: 4393344 (1983-07-01), Whellams
patent: 4395670 (1983-07-01), Podell
patent: 4514677 (1985-04-01), Kaufman, III et al.
patent: 4612490 (1986-09-01), Kagi
patent: 4754211 (1988-06-01), Karjalainen
patent: 4812728 (1989-03-01), Yang
patent: 4857818 (1989-08-01), Hobbs
Tak Kenjo; Electric Motors and their Controls; 1991; Section 4.4, pp. 100-103.
Black & Decker Inc.
Dearing Dennis A.
Del Ponti John D.
Martin David
Shapiro Bruce S.
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