How speed of the DC shunt motor can be increased?

How speed of the DC shunt motor can be increased?

How speed of the DC shunt motor can be increased? Decreasing armature current will help in increasing speed for DC shunt motor. Since load current is addition of armature current and field current we’ll get less armature current for more field current.

Which is the most efficient way of controlling a DC shunt motor?

The greatest advantage of DC motors may be speed control. Since speed is directly proportional to armature voltage and inversely proportional to the magnetic flux produced by the poles, adjusting the armature voltage or the field current will change the rotor speed.

What is the main advantage of a shunt DC motor?

Advantages of Dc shunt motor: The power supply of the DC motor is any way cheap. Shunt would motor able to runs at a predetermined speed. The speed of a dc shunt motor is sufficiently constant. Direct current machines can use for heavy industrial applications where the torque and speed wider range.

What will happen if excitation of DC shunt motor is changed?

If the excitation or field current is changed, the armature current changes, and back emf also will be changed accordingly and hence power will remain constant.

What is the application of DC shunt motor?

The applications of shunt DC motor include the following. These motors are used wherever stable speed is required. This kind of DC motor can be used in Centrifugal Pumps, Lifts, Weaving Machine, Lathe Machines, Blowers, Fans, Conveyors, Spinning machines, etc.

Which of the following is the most efficient method for increasing the speed of 4 KW DC shunt motor?

By varying flux, we can increase the speed more than its base speed. This method is constant power and variable torque drive.

What is the main disadvantage of shunt motor?

As the load changes, a shunt wound motor runs at a predictable speed. If variable speed is desired, constant speed can be a disadvantage. The lifetime of the motor is usually not improved by brushes.

What is shunt and its principle?

A shunt motor (known as a shunt wound DC motor) is a type of DC motor which is self-excited and has the field windings that are connected in parallel to the armature winding of the motor. As these two parts are connected in parallel, the armature and field windings are exposed to the same supply voltage.

What kind of motor is a shunt motor?

A DC shunt motor is a type of self-excited DC motor, and it is also known as a shunt wound DC motor. The field windings in this motor can be connected in parallel to the armature winding.

How does a DC shunt circuit use a Variac?

The simple DC shunt motor controller circuit presented in the following article uses a variac. This design facilitates an instant stopping of the motor at any stage with a flick of a switch, along with reversing the motor direction. It also provides speed control for the motor with a high level of accuracy.

How does a DC shunt motor gain speed?

Thus, the DC motor will draw extra current, this will consequence in enhance within torque to gain speed. So, whenever the load enhances, the net result of load on speed in a motor is approximately nil.

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.