What is a separately excited DC shunt motor?

I've always known of a shunt motor as a kind of self-excited motor. But this thing called separately excited DC shunt motor intrigues me. Please fill me in.

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  • EE68PE
    Lv 6
    1 decade ago
    Favourite answer

    A separately excited DC motor has a regulated or unregulated power supply that supplies power to the field winding that is completely independent from the power supplied to the armature. For many years, this was the most common configuration used in industrial applications for DC motors with electronic speed control. Now that AC motors with variable frequency drives are used in most industrial applications, more of the remaining DC motor applications may use less expensive configurations.

    In the most common configuration, armature voltage control was used in conjunction with constant or variable voltage field excitation. Controlling the motor by only controlling the field excitation was less common.

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  • heyder
    Lv 4
    4 years ago

    Separately Excited Dc Motor

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  • Anonymous
    4 years ago

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    A shunt generator is a method in which field winding and armature winding are connected in parallel, and in which the armature supplies both the load current and the field current. A DC shunt generator is a type of shunt generator that requires a DC field current. A shunt generator can be parallel or in series to the armature. There are four types of shunt generators: short-shunt, long shunt, series, or parallel. A D.C. generator is an energy converter. Mechanical power input received from a prime mover (D.C. motor in this case) is converted electromagnetically into electrical energy. This electrical energy can be changed into heat as is done by connecting load resistors across its armature terminals. It is essential that the field windings of the generator be excited with D.C. current. The two main fields are the shunt & series. If the shunt field alone is used then the generator is called a shunt generator; while if the series field alone is used, it is called a series generator. When both windings are used, we have the compound generator. As the name indicates,shunt field is connected in parallel with the armature, whereas the series field is connected in series with the armature or the load. The shunt field is of larger number of turns and of higher resistance than the series field. The shunt field can be excited either from a separate source (separately excited generator) or from the armature of the same generator (self-excited shunt generator). It is possible to have two types of compound generators; one is for the cumulative operation and the other for the differential operation; in the former the series field assists the shunt-field, while in the latter it opposes it. This will be seen from the results of the experiment.

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  • Anonymous
    5 years ago

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    RE:

    What is a separately excited DC shunt motor?

    I've always known of a shunt motor as a kind of self-excited motor. But this thing called separately excited DC shunt motor intrigues me. Please fill me in.

    Source(s): separately excited dc shunt motor: https://tr.im/LVfJO
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  • 1 decade ago

    It is a shunt filed motor with separate connections for the armature and the field coils, so that each can be powered independently. This allows both the direction of rotation and the unloaded speed to be varied by just reversing and varying the field voltage. Somewhat unintuitively, the higher the field voltage, the slower the motor runs for a given torque load.

    --

    Regards,

    John Popelish

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  • 5 years ago

    The rotor and stator are each connected from a different power

    supply, this gives another degree of freedom for controlling the motor over the shunt.

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  • 1 decade ago

    In shunt motors, the field circuit is in parallel with armature circuit.

    If the field coils and armature coils are energised with the same supply , it is self excited motor.

    If the field coil is energised from an external supply, it is seperately excited motor.

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  • 5 years ago

    as we know armature is independent of power supply, but we know only a CURRENT CARRYING conductor placed in magnetic field experiences. then how come motor rotates??

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