Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Field control – or field and armature control – by analog...
Patent
1995-08-02
1998-11-17
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, 388804, H02P 506
Patent
active
058388770
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), Brahmavar 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.
Abbas Mohamed
Elliot James
Holmes Thomas W.
Suriano John R.
ITT Automotive Electrical Systems Inc.
Lewis J. Gordon
Lockett Kim
Shoop Jr. William M.
Twomey Thomas N.
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