How do you find the armature current of a DC shunt motor?

How do you find the armature current of a DC shunt motor?

1. When dealing with DC motors, sketch the circuit. You know Total Power PT = 11kW and Total Voltage VT = 220V.
2. The shunt field and armature are in parallel. You have the field resistance and the total voltage is applied across the field.
3. Apply KCL to determine Ia.
4. Not asked, but from there you can calculate back-emf E0.

How do you find armature current?

To find the torque it is possible to either substitute directly into the series motor torque-speed equation, or to first find the armature currents:

1. ωm=VT√kc1√τ−RA+RSkcωm=nm2π60=50π3.
2. Alternately, substitute EA=kcIAωm into in the armature loop equation to obtain VT=IA(kcωm+RA+RS) and solve for armature current.

How do you calculate armature current in a DC shunt generator?

V = Ea – Ia(Ra + Rse)

1. Ea is the armature induced voltage.
2. Ia is the armature current.
3. Ra is the armature resistance.
4. Rse is the series field resistance.

What is the formula for current taken by a DC motor armature?

Find the field resistance or terminal resistance of the DC motor. Refer to the schematic or the specifications of the electric motor. Call this value R. Calculate the field current for the motor using the formula I = V/R where I is the field current.

What is armature power?

In electrical engineering, an armature is the component of an electric machine which carries alternating current. When the machine or motor is used as a motor, this EMF opposes the armature current, and the armature converts electrical power to mechanical power in the form of torque, and transfers it via the shaft.

What is an armature current?

Armature Current is the Current which Flows in Armature Winding or rotating Winding of Motor or generator. An armature is the component of an electric machine that carries alternating current.

Where are DC generators used?

Applications of DC Generators

• These generators are used to charge batteries, provide lighting and provide excitation to alternators.
• They are used to provide field excitation current for regenerative braking in DC locomotives.
• They are used in DC motors where speed control is necessary.

How to calculate the voltage of a DC shunt motor?

Thus we put this value of armature current I a to get general voltage equation of a DC shunt motor. 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,

How is the armature current of a DC motor calculated?

If it’s a motor, the armature current is electrical power provided by the power supply to the armature windings in order to create a magnetic field to oppose the magnetic field of the field winding and thereby create rotational energy (torque) that can be used to do work. Which current is greater, armature or field current in DC?

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.

How is the field current and armature current related?

Field current is electrical power provided to the field windings, but the source and control depend on whether it’s a motor or generator. Armature current is even more so determined by generator or motor.