What is armature voltage in a DC shunt motor?
What is armature voltage in a DC shunt motor?
Armature/Field Voltage As a result, most spec sheets provide two rated voltages for a shunt DC motor, one for each coil, oftentimes with ranges. For example, a shunt motor could have a field voltage of 220 V with a max up to 500V and an armature voltage of 440 V with a max up to 600 V.
How do you find the voltage of an armature?
Calculate the induced armature voltage using the formula Eo = (Z N M)/ 60 where Eo is the induced armature voltage. For example, if Z is 360 conductors, N is 1200 rpm and M is 0.04 Wb, then [(360)(1200)(0.04)]/60 equals 288 volts.
How is an armature voltage controlled in a DC motor?
The speed is directly proportional to the voltage applied across the armature. As the supply voltage is normally constant, the voltage across the armature can be controlled by adding a variable resistance in series with the armature as shown in the Fig.
What is armature current of DC motor?
An armature controlled DC motor is a direct current (DC) motor that uses a permanent magnet driven by the armature coils only.
How is DC motor armature current calculated?
Since you know the power rating of the motor and the supply voltage, you can calculate the current required by the motor from the equation; P=VxI .
Why is armature resistance low in DC motor?
The armature produces a back EMF depending on its speed, which bucks the supply voltage. The armature current then will depend on the difference between the supply voltage and the EMF. So the armature resistance must be low enough to allow sufficient current to flow even with this reduced voltage.
What is armature terminal voltage?
The armature phase current decreases as the terminal voltage per phase increases for lagging power factor load in 12(b). In Figure 12(c), the torque angle at point K is zero and the armature current per phase is 58.6A. The terminal voltage at point is 8075.8V which is equal to no-load induced emf.
How do you calculate the armature current of a DC motor?
What is the effect of armature voltage on speed of DC motor?
Speed of the motor is directly proportional to supply voltage. The Speed of the motor is inversely proportional to armature voltage drop.
How do you calculate armature current of a DC motor?
Armature Current for DC shunt generator calculator uses Armature Current = Field Current+Load Current to calculate the Armature Current, Armature Current for DC shunt generator is the Current which Flows in Armature Winding or rotating Winding of Motor or generator.
What is armature constant in DC machine?
The armature of an electric machine is the name historically given to the winding where a voltage is induced and power transfer between electrical and mechanical systems occurs. It is a term used in dc machines and ac synchronous machines. In a dc machine, the armature is the rotating circuit.
What is terminal voltage in DC motor?
The field winding is supplied with a constant voltage VF=24V and the field resistance is adjustable. The armature winding resistance RA=0.2Ω, and the armature terminal voltage VT=130V.