| US 7,476,022 B2 | ||
| Measurement of motor temperature using a digital encoder | ||
| G. Clarke Oberheide, Troy, Mich. (US); and Bruce R. Cluney, Aurora (Canada) | ||
| Assigned to Magna Closures Inc., Newmarket, Ontario (Canada) | ||
| Filed on Sep. 15, 2006, as Appl. No. 11/521,821. | ||
| Claims priority of provisional application 60/717491, filed on Sep. 15, 2005. | ||
| Prior Publication US 2007/0121703 A1, May 31, 2007 | ||
| Int. Cl. G01K 7/00 (2006.01) | ||
| U.S. Cl. 374—163 [374/100; 374/141] | 7 Claims |
| 1. A temperature sensing assembly for a motor having an armature, said temperature sensing assembly comprising:
a voltage source;
a Hall Effect sensor connected to said voltage source and disposed adjacent the armature for sensing rotation of the armature,
said Hall Effect sensor including an electrical output and generating a stepped output signal;
a thermistor connected to said electrical output in series therewith; and
a pull-up resistor electrically connected to said thermistor and said voltage source such that said stepped output signal
changes depending on the temperature of the motor due to changes in resistivity of said thermistor as it changes its resistivity
as a function of temperature.
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