General Drives Questions Frequently Asked Questions
General Drives Questions Frequently Asked Questions
| Question | How many poles should the motor have, and how does this relate to the motor's speed? |
| Answer | Using a four-pole motor will work for most applications. Hitachi inverters can be configured to operate motors with 2, 4, 6, or 8 poles. The greater the number of poles, the slower the base motor speed will be, but it will have higher torque at the slower speed. The number of poles that a motor has determines it's speed at a particular frequency. The synchronous speeds for three phase 60 Hz motors are as follows: 2 pole = 3600 rpm; 4 pole = 1800 rpm; 6 pole = 1200 rpm; 8 pole = 900 rpm. |
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This item was last updated on 09-25-2007
Document ID: 296
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