Yaskawa Electric New and original SGM-A5A3G46 200V 3000rpm 0.6A 1 year warranty

Another important element to note is that under load, the rotating parts of the motor fall behind or “slip” the magnetic speed. Using the standard formula, you can determine that a four-pole motor operating under no-load conditions will run at 1,800 RPM (7,200 divided by four poles). Loaded, the motor will slip to between 1,600 and 1,750 RPM. Four pole designs are the most common pole configuration for AC induction motors and are typically found in belted applications such as blowers, fans, air-handling equipment, compressors, commercial garage door openers, and conveyors. A two-pole motor will operate at 3,600 RPM unloaded and between 3,000 and 3,450 RPM under load. Such speeds are commonly found in pump applications, such as submersible pumps, sump pumps, and pool or water recirculating equipment.

Another typical application is small ventilating fans. To the untrained ear, two-pole motors appear to need servicing because they sound somewhat noisier when running. This is principally due to the higher RPM, and as a service technician, you should be aware of the different “normal” sounds a motor makes that are related to speed. Six-pole motors run at 1,200 RPM unloaded and between 1,050 and 1,175 RPM loaded. They are often used for air-handling equipment, direct-drive applications, window fans, furnace blowers, room air conditioners, heat pumps, residential garage door openers, and other equipment.

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