When is the shunt field of a DC motor constant?
When is the shunt field of a DC motor constant?
Now in general practice, when the motor is in its running condition, and the supply voltage is constant and the shunt field current given by, Thus the field flux remains more or less constant, and for this reason, a shunt wound DC motor is called a constant flux motor.
How does the magnetic field of a DC motor work?
The direction and magnitude of the magnetic field produced by the coil can be changed with the direction and magnitude of the current flowing through it. A simple DC motor has a stationary set of magnets in the stator and an armature with one or more windings of insulated wire wrapped around a soft iron core that concentrates the magnetic field.
Where does a shunt wound DC motor fall?
The shunt wound DC motor falls under the category of self excited DC motors, where the field windings are shunted to, or are connected in parallel to the armature winding of the motor, as its name is suggestive of.
Where can I find all recall or field service action?
You can search for all Recall or Field Service Action initiated after 01/01/1999. If you still have concerns about Recalls, please contact the Customer Relationship Center: In the U.S. at 1-866-436-7332, or at 1-800-232-5952 (TDD) for the hearing impaired.
What does the current indicate on a motor nameplate?
4. Current. Current indicated on the nameplate corresponds to the rated power output together with voltage and frequency. Current may deviate from the nameplate amperes if the phases are unbalanced or if the voltage turns out to be lower than indicated.
How to test field windings of the DC motors?
A visual inspection will show if the commutator is burnt or the field coils have been over heated. How to test field windings & armature windings of the DC motors ?
When to use compound motor in Series motor?
The starting torque is higher than in the shunt motor but lower than in the series motor. Variation of speed with load is less than in a series wound motor but greater than in a shunt motor. The compound motor is used whenever the combined characteristics of the series and shunt motors are desired.
The direction and magnitude of the magnetic field produced by the coil can be changed with the direction and magnitude of the current flowing through it. A simple DC motor has a stationary set of magnets in the stator and an armature with one or more windings of insulated wire wrapped around a soft iron core that concentrates the magnetic field.
