Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control
Patent
1994-12-09
1997-01-28
Stephan, Steven L.
Electricity: motive power systems
Reciprocating or oscillating motor
Energizing winding circuit control
235462, 310 31, H02K 2908, H02K 3316
Patent
active
055980708
ABSTRACT:
A control system for a scanning motor that may operate at constant power, which has a control circuit including an H-Bridge connected across the drive coil of the motor. The control circuit operates under microprocessor control for digitally generating selected high current and a low current thresholds, which can be changed to enable the scanning motor to be operative over a large range (e.g. 3.3 v to 8 v) of supply voltage and to control the arc over which the motor oscillates and, therefore, the scan angle of an optical beam which scans a bar code. The control circuit turns the current to the drive coil on and off when the high and low thresholds are reached thereby varying the current which the motor draws which determines the scan angle and scan rate and average current draw, which may be maintained constant for constant power consumption.
REFERENCES:
patent: 3883786 (1975-05-01), McNaughton et al.
patent: 4153863 (1979-05-01), Schachte
patent: 4471278 (1984-09-01), Matouka
patent: 4508999 (1985-04-01), Melocik et al.
patent: 4523134 (1985-06-01), Kinoshita et al.
patent: 4600983 (1986-07-01), Petsch
patent: 4628460 (1986-12-01), Frederich
patent: 4661756 (1987-04-01), Murphy et al.
patent: 4757241 (1988-07-01), Young
patent: 4841207 (1989-06-01), Cheyne
patent: 4933620 (1990-06-01), MacMinn et al.
patent: 4952011 (1990-08-01), Ishii et al.
patent: 5130618 (1992-07-01), Pardoe
patent: 5200597 (1993-04-01), Eastman et al.
patent: 5258699 (1993-11-01), Grodevant
patent: 5281801 (1994-01-01), Shepard et al.
patent: 5479557 (1995-12-01), Ganz et al.
patent: 5519301 (1996-05-01), Yoshida et al.
Jones Judson H.
Murphy Joseph F.
PSC Inc.
Stephan Steven L.
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