Table of Contents
- 1 Why squirrel cage rotor is short circuited?
- 2 What is the function of the end rings in squirrel cage rotor?
- 3 Why rotor winding is short circuited?
- 4 What is the purpose of squirrel cage?
- 5 What is the advantage of the double squirrel cage rotor as compared to the round bar cage rotor?
- 6 Which part of squirrel cage rotor is short circuited?
- 7 Which material is used for short-circuited bars?
Why squirrel cage rotor is short circuited?
Shorting of rotor bars in form of squirrel cage cause the suitable low impedance path for rotor induced currents. The impedance characteristics (R & X) of rotor winding infects the motor performance, starting torque, and total losses consequently motor efficiency.
What is the function of the end rings in squirrel cage rotor?
The end rings in the rotor of a squirrel cage induction motor are used to hold the bars firmly in the slots, since loose bars can get damaged quickly due to mechanical vibrations and thermal cycling. They also produce the short circuit required for the induction of current in the rotor bars.
Why rotor winding is short circuited?
The current carrying rotor being placed in a magnetic field, experiences a torque and hence begins to rotate. Current requires a closed path to flow. Hence, the ends are short circuited so that the induced current can flow through it and produce required magnetic flux in order to rotate.
How does a squirrel cage rotor work?
A squirrel-cage rotor is the rotating part of the common squirrel-cage induction motor. By adjusting the shape of the bars in the rotor, the speed-torque characteristics of the motor can be changed, to minimize starting current or to maximize low-speed torque, for example.
Which part of squirrel cage rotor is short-circuited?
Squirrel Cage Rotor To facilitate a closed path in the rotor circuit, both sides of the rotor bars are short-circuited by end rings.
What is the purpose of squirrel cage?
The main use of a squirrel-cage motor in a home HVAC system is that it powers the blower fan. If you have a forced-air heating system, such as a furnace, and/or an air conditioning system, the squirrel-cage motor is the part that turns the fans that blows the heated and cooled air through the ventilation system.
What is the advantage of the double squirrel cage rotor as compared to the round bar cage rotor?
A double cage rotor has low starting current and high starting torque, therefore, it is more suitable for direct on line starting. Since effective rotor resistance of double cage motor is higher, there is larger rotor heating at the time of starting as compared to that of single cage rotor.
Which part of squirrel cage rotor is short circuited?
What is squirrel cage and slip ring induction?
Summary of Differences between Squirrel Cage & Slip Ring Induction Motors
| Parameter of Comparison | Squirrel-Cage Induction Motor | Slip-Ring Induction Motor |
|---|---|---|
| Starting Torque | Low | High |
| Brushes | Not used | Used |
| Maintenance | Less maintenance is required. | Frequent maintenance is required. |
| Copper Loss | Low | High |
Is squirrel cage motor synchronous?
Synchronous motor: Stator has axial slots which consist stator winding wound for a specific number of poles. It is wound for a specific number of poles. A squirrel cage rotor or a wound rotor can be used. In squirrel cage rotor, the rotor bars are permanently short-circuited with end rings.
Which material is used for short-circuited bars?
Part No. VNRLBXU KS SQ A NS VNRLBXU
| Application | LV |
|---|---|
| Standard | EN/IEC 61230 (DIN VDE 0683-100) |
| Temperature range | –25 °C +55 °C |
| Material (Short-Circuiting Bar) | Aluminium |
| Material (cable) | Highly flexible copper |