What type of motor is used for intermittent loads?
4. Which DC motor is used with flywheel for intermittent light and heavy loads? Explanation: Cumulative compound DC motor is used with flywheel carrying peaks and so to smooth out the load on the motor as well as to reduce peaks on power system. Without flywheel the motor construction will be much larger.
Which motor is used for a high torque load?
Series wound DC motors are best for applications that require high startup torque, without the need for speed regulation. Like a shunt motor, as a load is applied to a DC series motor, the motor speed decreases, which reduces the back EMF and increases the net voltage.
Which motor is used to starts heavy loads?
The starting torque of the DC series motor is proportional to the square of the armature current. The armature current-Torque characteristics of the DC series motor is as given below. That is why DC series motor is capable to produce high starting torque, and it is preferred for driving heavy loads.
Which type of DC motor is used for sudden application of heavy loads?
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. High starting torque enables, even a small series motor to start a heavy load.
Why is the DC motor preferred over AC motor?
Because DC motors have higher starting torque compared to AC motors, they are preferred for applications like electrical traction. They are considered ideal for dealing with heavy loads for starting conditions in machines such as locomotives and cranes.
Which DC motor has the best starting torque?
The torque of the DC series motor is proportional to the square of the armature current. That is why DC series motor has high starting torque. The DC series motor produces the highest torque among all kinds of motors.
How do you select a motor according to load?
5 steps to choose the best motor for your application
- Step 1: Know the load characteristics. …
- Step 2: Get a handle on horsepower. …
- Step 3: Getting started. …
- Step 4: Adjust for duty cycle. …
- Step 5: The last consideration, motor hypoxia.
Why commutators are sparking heavily?
Sparking can be caused by numerous conditions like motor overload, vibration, high humidity, worn brushes and worn commutators. When checking for sparking or arcing, a good visual inspection of thecommutator and brushes will have to be performed.
Which is the most suitable motor for elevators?
DC cumulative compound motor having high starting torque up to 450% depending upon the degree of compounding. The speed regulation is varying up to 25 ~ 30%. That’s why these motors are used in elevators.
Can a DC shunt motor run at heavy loads?
DC shunt motors should never be started on heavy loads because such loads need heavy starting current.