Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1994-09-30
1997-06-24
Sircus, Brian
Electricity: motive power systems
Induction motor systems
Primary circuit control
318444, 318467, 318468, 318254, H02P 104
Patent
active
056420269
ABSTRACT:
A windshield wiper system having variable frequency induction motor control for reducing wipe speed at reversal points includes an induction motor, a wiper and blade assembly operatively connected to the motor, a sensing means for detecting when the position of the wiper and blade assembly is within a preselected range of one of the reversal points, and a motor control responsive to the control signal generated by the sensing means for causing the motor to reduce wipe speed during the preselected range prior to the reversal point to reduce pattern growth, noise, and water expulsion. The sensing means takes the form of a cam or plate operated switch driven by the induction motor. The control signal derived from the cam operated switch is provided as an input to a voltage controlled oscillator, whose variable frequency output is used to vary the frequency of the excitation voltage applied to the windings of the three phase induction motor.
REFERENCES:
patent: Re33848 (1992-03-01), Shiraishi
patent: 4514669 (1985-04-01), Ecole
patent: 4578591 (1986-03-01), Floyd et al.
patent: 4585980 (1986-04-01), Gille et al.
patent: 4614903 (1986-09-01), Betsch et al.
patent: 4663575 (1987-05-01), Juzswik et al.
patent: 4664575 (1987-05-01), Juzswik et al.
patent: 4665488 (1987-05-01), Graham et al.
patent: 4705997 (1987-11-01), Juzswik
patent: 4705998 (1987-11-01), Millerd et al.
patent: 4827198 (1989-05-01), Mueller et al.
patent: 4843296 (1989-06-01), Tanaka
patent: 4881019 (1989-11-01), Shiraishi et al.
patent: 4916374 (1990-04-01), Schierbeek et al.
patent: 4956591 (1990-09-01), Schierbeek et al.
patent: 4975979 (1990-12-01), Baird
patent: 5059877 (1991-10-01), Teder
patent: 5117168 (1992-05-01), Nomura et al.
patent: 5140233 (1992-08-01), Wallrafen
patent: 5140234 (1992-08-01), Wallrafen
patent: 5157312 (1992-10-01), Wallrafen et al.
patent: 5216341 (1993-06-01), Nomura et al.
patent: 5252897 (1993-10-01), Porter et al.
patent: 5254916 (1993-10-01), Hopkins
patent: 5355061 (1994-10-01), Forhan
patent: 5363028 (1994-11-01), Mori
patent: 5386111 (1995-01-01), Zimmerman
patent: 5397991 (1995-03-01), Rogers
patent: 5404085 (1995-04-01), Resch et al.
patent: 5504406 (1996-04-01), Shultz et al.
Cook Keith Richard
McCann Roy Alan
Suriano John Riden
ITT Automotive Electrical Systems Inc.
Lewis J. Gordon
Sircus Brian
Twomey Thomas N.
LandOfFree
Windshield wiper system having reduced wipe speed at reversal po does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Windshield wiper system having reduced wipe speed at reversal po, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Windshield wiper system having reduced wipe speed at reversal po will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-150845