What is the characteristics of DC shunt motor?

A DC shunt motor (also known as a shunt wound DC motor) is a type of self-excited DC motor where the field windings are shunted to or are connected in parallel to the armature winding of the motor. Since they are connected in parallel, the armature and field windings are exposed to the same supply voltage.

What is speed-torque characteristic?

Torque Speed Characteristic is the curve plotted between the torque and the speed of the induction motor. We have already discussed the torque of the induction motor in the topic Torque Equation of an Induction motor.

Which of the following is the speed-torque characteristics of a DC series motor?

Since a series motor develops high starting torques at low speeds and low torque at high speeds, therefore, speed – torque characteristics of a DC series motor is a hyperbola.

What is the relationship between speed and torque regulation in DC shunt motors?

This second relationship—between speed and load (or torque)—is typically shown on the motor’s torque-speed curve. Of course, the motor constant (k) doesn’t change, and resistance (R) in the motor windings is constant. Therefore, when supply voltage (V) is constant, torque (T) is inversely proportional to speed (ω).

Which DC motor gives constant speed characteristics and how?

Hence, a DC shunt motor is able to self-regulate its speed, and can be referred to as a constant speed motor. When a load is applied to a DC shunt motor, its speed decreases, but the motor is able to self-regulate and quickly compensate for the lost speed.

Why are speed torque characteristics important?

plots the torque of a motor against the speed the motor is going at. The relationship between the torque and the speed is critical to choosing the right motor for your application. …

How speed of 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.

How speed of the DC shunt motor can be increased?

How does speed affect torque?

Torque is inversely proportional to speed. Thus, when speed increases, torque will decrease.

What is the torque developed in a DC shunt motor?

In case of dc shunt motors the field excitation current is constant and supply voltage is kept constant. Therefore flux per pole will be constant.  Therefore torque developed in a dc shunt motor will be directly proportional to the armature current. The graph representing the variation of torque with armature current.

Is the speed of a shunt motor constant under normal conditions?

For a DC shunt motor, the back EMF and flux both are constant under normal operating conditions. Therefore, the speed of a shunt motor will remain constant with respect to armature current as shown by dotted line.

What is the difference between DC shunt motor and DC Differential compound motor?

The back emf decreases as the load current increases but it decreases slightly less than that of flux. Therefore the speed of the DC Differential compound motor is slightly higher than the DC Shunt motor for a given armature current. The DC Differential compound motor is useful for constant speed application.

What is the torque of DC motor?

The torque of the DC motor is proportional to the product of the flux and the armature current. The characteristic of torque and armature current is a straight line from the origin. The shaft torque is always less than the gross torque. This is because of stray losses.