Which of the following applications requires high starting torque?
Table of Contents
- 1 Which of the following applications requires high starting torque?
- 2 Which motor has a poor starting torque for both the HP rating and full load speed?
- 3 Why is high starting torque required?
- 4 Which motor has more starting torque?
- 5 Which of the motor has poor starting torque?
- 6 What are the types of starter used for starting DC motor?
Which of the following applications requires high starting torque?
Railway locomotives need high starting torque to move from a stationary position due to their heavy load. DC motors are well suited due to the locomotive’s high torque.
Which type of motor has a good starting torque?
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 has a poor starting torque for both the HP rating and full load speed?
differential compound motor
5. For the same H.P. rating and full load speed, which of the following motor has poor starting torque? Explanation: In differential compound motor, series field opposes shunt field. It has poor starting torque as the resultant flux is minimized by this opposition.
Why are starters required in a DC motor?
Starters are used to protect DC motors from damage that can be caused by very high current and torque during startup. They do this by providing external resistance to the motor, which is connected in series to the motor’s armature winding and restricts the current to an acceptable level.
Why is high starting torque required?
Locked Rotor or Starting Torque The Locked Rotor Torque or Starting Torque is the torque an electrical motor develops when starting at zero speed. A high Starting Torque is more important for application or machines hard to start – like positive displacement pumps, cranes etc.
Which of the following application requires high?
Following motor is used where high starting torque and wide speed range control isrequired. For constant torque drive which speed control method is preferred?…
| Q. | Which of the following application requires high starting torque? |
|---|---|
| A. | Lathe machine |
| B. | Centrifugal pump |
| C. | Locomotive |
| D. | Air blower |
Which motor has more starting torque?
capacitor start motor
The capacitor start motor develops a much higher starting torque of about 3 to 4.5 times of the full load torque.
What is rated torque?
The rated torque is the maximum continuous torque that the motor produces at rated RPM when working normally and without overheating, whereas the stall torque is produced by the motor when RPM is 0 while the load is attached or at starting.
Which of the motor has poor starting torque?
Shaded-pole motor
Detailed Solution. Shaded-pole motor has the lowest starting torque whereas universal motor, capacitor start capacitor-run motor and repulsion induction motor have high starting torque.
How can you increase the starting torque of a three phase induction motor?
The starting torque of a three-phase induction motor can be…
- Increasing rotor reactance.
- Increasing rotor resistance.
- Increasing stator resistance.
- None of the above.
What are the types of starter used for starting DC motor?
Detailed Solution. There are mainly 3 types of DC motor starters, such as 2 point starter, 3 point starter and 4 point starter. The basic concept behind every DC motor starter is adding external resistance to the armature winding during starting.
What is the relation of the current with the starting torque in the starter concept?
What is the relation of the current with the starting torque in the starter concept? Explanation: The main function of the starter is to prevent excessive current flow. At the same time it should allow current to produce good or high starting torque.