What is the efficiency of a squirrel cage motor?
What is the efficiency of a squirrel cage motor?
Most pump drives employ squirrel-cage induction motors whose rated efficiency ηsn at power of above 2kW, are most often greater than 80%. High efficiency is maintained across a wide variation range of the relative torque m* (10) loading the motor’s shaft, at rated frequency and supply voltage (Fig. 1).
How do you calculate the efficiency of a single phase induction motor?
The efficiency is measured by dividing the total losses by two. – Method F: Equivalent circuit calculation. This is usually the least accurate way to calculated motor efficiency because such a large portion of losses are not directly measured.
How do you calculate the efficiency of a 3 phase induction motor?
Induction Motor Efficiency Example
- SCL=3×6.82×1.21=167.8W.
- Pout=5×746=3730W.
- RPD=3730+90+110=3930W.
- RCL=3994−3930=64W.
- Pin=3994+167.8+80=4242W.
Why is it called squirrel cage motor?
Squirrel cage motors are a subclass of induction motors, which harness electromagnetism to generate motion. They are so-called “squirrel cage” motors because the shape of their rotor – the inner component connected to the output shaft – looks like a cage.
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 efficiency of 3 phase motor?
Most electric motors are designed to run at 50% to 100% of rated load. Maximum efficiency is usually near 75% of rated load. Thus, a 10-horsepower (hp) motor has an acceptable load range of 5 to 10 hp; peak efficiency is at 7.5 hp. A motor’s efficiency tends to decrease dramatically below about 50% load.
What are the advantages of squirrel cage motor?
Advantages of Squirrel Cage Induction Motor They are low cost. Require less maintenance (as there are no slip rings or brushes) Good speed regulation (they are able to maintain a constant speed) High efficiency in converting electrical energy to mechanical energy (while running, not during startup)
