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hp 40 DIFFERENTIAL MOTOR has opposed shunt and series winding ; not much used and not recommended . Inclosed vs open type referring to the mechanical housing of the motor . OPEN TYPE has all parts freely exposed to the air and is ...
Belt drive is the commoner , since an induction motor can be built only for a definite speed , corresponding to a certain number of poles . Small motors need no foundation , and are often attached to the wall or ceiling , the bearings ...
This gives an unbalanced 3 - phase voltage on the motor , which produces a starting torque . Or , a commutator on the rotor may be used , making it possible to operate as a repulsion motor ( see below ) having good starting qualities .
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Conditions Methods in General
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