Electricity: motive power systems – Plural diverse motor controls – Motor-reversing
Patent
1990-11-30
1993-01-05
Wysocki, A. Jonathan
Electricity: motive power systems
Plural diverse motor controls
Motor-reversing
318DIG2, 1525017, H02P 300
Patent
active
051774186
ABSTRACT:
A sweeping apparatus such as a control system for windshield wipers includes a regulating means which generates a electrical control signal for three separate wiper control means or "paths". Each path includes a differential stage followed by a motor control strage, for controlling a motor having a driven shaft on which a digital coder is mounted. The magnitude of the output signal of the latter is processed in a feedback loop by a processing circuit and passed to the input differential stage. The outputs of the various differential stages are applied to respective comparators. The latter transmit a blocking signal via a NO or OR gate, to the regulating means when the input signal to the comparator exceeds a predetermined threshold value.
The invention is especially applicable to automotive windshield wiper systems.
REFERENCES:
patent: 4529920 (1985-07-01), Yoshida et al.
patent: 4563625 (1986-01-01), Kornbrekke et al.
patent: 4585980 (1986-04-01), Gille et al.
patent: 4663575 (1987-05-01), Juzswik et al.
patent: 4665488 (1987-05-01), Graham et al.
patent: 4713591 (1987-12-01), McCloskey
patent: 4742280 (1988-05-01), Ishikawa et al.
patent: 4866357 (1989-09-01), Miller et al.
patent: 4900996 (1990-02-01), Wainwright
Valeo Systemes D'Essuyage
Wysocki A. Jonathan
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