Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Field control – or field and armature control – by analog...
Patent
1996-08-01
1999-01-05
Shoop, Jr., William M.
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Field control, or field and armature control, by analog...
318434, H02P 506
Patent
active
058570608
ABSTRACT:
A system for reducing Radio Frequency Interference (RFI) produced by motors which are powered by Pulse Width Modulation (PWM). It is believed that the PWM induces radiation at the PWM frequency and harmonics. The invention shields power cables which carry the PWM pulsed current, and provides capacitive shunting of one of the cables to ground.
REFERENCES:
patent: 2698910 (1955-01-01), Blyth
patent: 2827582 (1958-03-01), Krebs
patent: 3866093 (1975-02-01), Kusters et al.
patent: 4013829 (1977-03-01), Baar et al.
patent: 4320329 (1982-03-01), Gille et al.
patent: 4473920 (1984-10-01), Itani
patent: 4527105 (1985-07-01), Shiraishi
patent: 4544870 (1985-10-01), Kearns et al.
patent: 4625157 (1986-11-01), Phillimore
patent: 4634944 (1987-01-01), Hastings et al.
patent: 4658213 (1987-04-01), Finley
patent: 4663575 (1987-05-01), Juzswik et al.
patent: 4672253 (1987-06-01), Tajima et al.
patent: 4673851 (1987-06-01), Disser
patent: 4687977 (1987-08-01), Brahmaver et al.
patent: 4689535 (1987-08-01), Tsumoda et al.
patent: 4692645 (1987-09-01), Gotou
patent: 4761576 (1988-08-01), Savage
patent: 4774424 (1988-09-01), Habermann
patent: 4874975 (1989-10-01), Hertrich
patent: 4890024 (1989-12-01), Hashimoto et al.
patent: 4933584 (1990-06-01), Harms et al.
patent: 4947066 (1990-08-01), Ghibu et al.
patent: 4947092 (1990-08-01), Nabha et al.
patent: 5030899 (1991-07-01), Nishibe et al.
patent: 5086245 (1992-02-01), Sieja et al.
patent: 5173651 (1992-12-01), Buckley et al.
patent: 5306992 (1994-04-01), Droge
patent: 5331257 (1994-07-01), Materne et al.
"Kein Patentrezept", Elektrische Energie Technik, vol. 36, number 4, Aug. 1, 1991, pp. 48-50 XP000233261.
"Noise Reduction Techniques in Electronic Systems", by Henry W. Ott, 1988, Wiley-Interscience Publication XP002019250, see pp. 73-158.
"Dis Enstorung von thyristogesteuerten Nebenschluss-motoren im Frequenzbereich von 0.15 bis 30 MHz", vol. 24, No. 1, Oct., 1970, p. 208, XP002018228.
"Bitte nicht storen", vol. 52, No. 8, Apr. 22, 1978, pp. 41-43, XP002018229.
"L'Antiparasitage des Thyristors", number 389, Sep. 6, 1974, XP002018230.
Abbas Mohamed
Elliott James
Holmes Thomas W.
Suriano John R.
ITT Automotive Electrical Systems Inc.
Lewis J. Gordon
Lockett Kim
Shoop Jr. William M.
Twomey Thomas N.
LandOfFree
Noise suppression in PWM-driven DC motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Noise suppression in PWM-driven DC motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise suppression in PWM-driven DC motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-868125