Force motor with null centering and null position bias

Details Force motor with null centering and null position bias Force motor with null centering and null position bias

H - Electricity

02

K

310/129

H02K 7/00 (2006.01) H01F 7/14 (2006.01) H02K 26/00 (2006.01)

Patent

CA 1218101

Title: "Force Motor With Null Centering and Null Position Bias" ABSTRACT OF THE DISCLOSURE Motor includes an internal torsion spring which provides for null centering of the rotor assembly while minimizing bearing load reactions and related friction. Two such centering springs may be provided whereby in the event one spring should fail, the other spring will still be operative to perform the desired null centering function. Also, an internal leaf spring interiorly of the rotor casing absorbs the full stroke rotor inertia without part damage or deformation. The null position bias of a motor driven valve may be established by adjustment of a pair of set screws which adjust the rotor assembly off null without inducing undesirable friction. The stator electrical torque null of the motor may also be set by providing an adjustable eccentric pin in the stator housing which is engageable in a notch in the rotor casing.

452722

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