G - Physics – 01 – L
Patent
G - Physics
01
L
G01L 3/00 (2006.01) H02P 1/44 (2006.01)
Patent
CA 2086769
- 20 - MULTI-LEVEL MOTOR LOAD SENSING CIRCUIT ABSTRACT A multi-level motor load sensing circuit senses first, second and third ranges of auxiliary winding voltage and provides a load-too-high signal for the first range, a load OK signal for the second range, and a load- too-low signal for the third range, and provides an output which transitions from the load-too-high signal to the load-OK signal to the load-too-low signal as auxilia- ry winding voltage increases from the first range to the second range to the third range, and which transitions from the load-too-low signal to the load-OK signal to the load-too-high signal as auxiliary winding voltage de- creases from the third range to the second to the first range. The output transitions twice during each of rising and falling values of auxiliary winding voltage between the first and third ranges. Hysteresis with improved tracking is also provided.
Borden Ladner Gervais Llp
Chmiel Steven F.
Rexnord Corporation Stearns Division
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