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Armature reaction drop is the effect of a magnetic field on the distribution of the flux under main poles of a generator. [5] Since an armature is wound with coils of wire, a magnetic field is set up in the armature whenever a current flows in the coils. This field is at right angles to the generator field and is called cross magnetization of ...
A compound DC motor connects the armature and fields windings in a shunt and a series combination to give it characteristics of both a shunt and a series DC motor. [5] This motor is used when both a high starting torque and good speed regulation is needed. The motor can be connected in two arrangements: cumulatively or differentially.
Separately excited DC motors are suitable for control applications because of separate field and armature circuit. [1] Two ways to control DC separately excited motors are: Armature Control and Field Control. [2] A DC motor consists of two parts: a rotor and a stator. [3] The stator consists of field windings while the rotor (also called the ...
A growler is an electrical device primarily used for testing a motor for shorted coils. A growler consists of a coil of wire wrapped around an iron core and connected to a source of alternating current. When placed on the armature or stator core of a motor the growler acts as the primary of a transformer and the armature coils act as the ...
A DC motor's speed and torque characteristics vary according to three different magnetization sources, separately excited field, self-excited field or permanent-field, which are used selectively to control the motor over the mechanical load's range. Self-excited field motors can be series, shunt, or a compound wound connected to the armature.
Jones, who died Sept. 9 at the age of 93, played the cantankerous and fictitious reclusive author Terence Mann in 1989’s “Field of Dreams,” a tug-on-the-heartstrings drama that played up the ...
The field coils can be mounted on either the rotor or the stator, depending on whichever method is the most cost-effective for the device design. In a brushed DC motor the field is static but the armature current must be commutated, so as to continually rotate
No sport is more steeped in nostalgia than baseball, and no movie is more tied to baseball's nostalgia than "Field of Dreams." The 1989 Kevin Costner classic placed baseball on a mythical pedestal ...