To satisfy consumers’ desires for quieter motors, manufacturers have developed eight-pole motors. These operate at 900 rpm (unloaded) and approximately 800 rpm under load. They are being used in applications where customers expect quieter operation, such as room air conditioners and outdoor heat pump applications.
What is the rpm of a motor that has 8 poles and operates on 60hz?
At 60 Hz, a motor with six poles would run at 1,200 RPM under no load and at approximately 1,175 RPM loaded. A motor with eight poles would run at 900 RPM unloaded and at about 800 RPM under load.
What is a 8 pole motor?
An 8 poles machines’ synchronous speed is 750 RPM. As the number of poles is increased, the magnetizing current of the motor increases and the motor can deliver the higher starting as well as the running torque. The frame size of the motor increase with an increase in the number of poles.
Which is better 2 pole or 4 pole motor?
A 2 pole motor has high speed due to less number of poles. Conversely, a 4 pole motor has low speed due to more number of poles. A 2 pole motor is more efficient on the flip side, a 4 poles motor is less efficient. A 2 pole motor has more RPM value; on the other side, the 4 poles motor has fewer revolutions per minute.
How do I lower the RPM on my electric motor?
A couple of things you can do:
- Use gears to change ratio of speed, which is what you’re going to do. …
- Use a stepper motor, which are commonly used for high-torque, low RPM applications.
- Find some sort of PWM control circuit to slow it down, although you probably won’t be able to get it down to 5-10RPM.
Can we increase the RPM of motor?
Yes, but with a small amount above the maximum speed under normal rated conditions. Increasing the speed can be achieved by increasing the supply frequency as the speed and frequency are directly proportional; however, there are two constraints.
Which brand promotes 8 pole motor in AC?
Hindustan 685 RPM 8 Pole High Efficiency Motor
What is pole in electric motor?
Simply defined, a pole is a north or south magnetic field of force that is generated by a permanent magnet or current passing through a coil of wire. … Permanent-magnet stepper motors are the simplest. Manufacturers define their pole count by the number of pole pairs or stator windings.
How many Poles do DC motors have?
Unlike the demonstration motor above, DC motors are commonly designed with more than two poles, are able to start from any position, and do not have any position where current can flow without producing electromotive power by passing through some coil.