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Wound-rotor motors can be started with low inrush current, by inserting high resistance into the rotor circuit; as the motor accelerates, the resistance can be decreased. [ 1 ] Compared to a squirrel-cage rotor , the rotor of the slip ring motor has more winding turns; the induced voltage is then higher, and the current lower, than for a ...
Manufacturer of brushless wound-rotor (synchronous) doubly-fed electric motor. Bharat Heavy Electricals: Bombardier: Traction drives CG Power & Industrial Solutions: Traction, Propulsion, Locomotive, Trainset, Electric Multiple Unit, Tower Car, Control Cubicle, Signalling Relays, Point machine, LOCO electrics, Converter, CRRC
The principal components of electric motors are the stator and the rotor. [26] Synchronous motor and induction motor stators are similar in construction. [27] The construction of synchronous motor is similar to that of a synchronous alternator. [28] The stator frame contains wrapper plate (except for wound-rotor synchronous doubly fed electric ...
A synchronous motor may have a squirrel-cage winding embedded in its rotor, used to increase the motor starting torque and so decrease the time to accelerate to synchronous speed. The squirrel cage winding of a synchronous machine will generally be smaller than for an induction machine of similar rating.
The SRM has wound field coils as in a DC motor for the stator windings. The rotor however has no magnets or coils attached. It is a solid salient-pole rotor (having projecting magnetic poles) made of soft magnetic material, typically laminated steel. When power is applied to a stator winding, the rotor's magnetic reluctance creates a force that ...
The rotor operates at synchronous speeds without current-conducting parts. Rotor losses are minimal compared to those of an induction motor, however it normally has less torque. [2] [3] Once started at synchronous speed, the motor can operate with sinusoidal voltage. Speed control requires a variable-frequency drive.
In the case of French TGV power cars, a motor mounted to the power car's frame drives each axle; a "tripod" drive allows a small amount of flexibility in the drive train allowing the trucks bogies to pivot. By mounting the relatively heavy traction motor directly to the power car's frame, rather than to the bogie, better dynamics are obtained ...
The Steinmetz car is permanent displayed in the first-floor corridor between the Wold Center and F.W. Olin building. [ 39 ] [ 40 ] A Chicago public high school, Steinmetz College Prep , is named for him, [ 41 ] as well as a Schenectady public school, the Steinmetz Career and Leadership Academy, formerly Steinmetz Middle-School.
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