Best Electric motor winding formula pdf All, It’s Free! Eng-Tips’s functionality depends on members receiving e-mail.
By joining you are opting in to receive e-mail. Promoting, selling, recruiting, coursework and thesis posting is forbidden. 4 members like this thread! If so, which motor parameters do i need? You caanot estimate motor winding temp based on your parameters since the cooling of the motor will be different for each type of motor. Again these RTD’s may not be located in the hottest spot, hence the maximum temp limits set by standards for such measurements.
Refer any standard on motors. I use coil resistance to calculate the temperature of relays for UL. Of ourse, you have to turn the motor off to do it. Measure motor winding resistance between two leads at ambient temperature. If you are interested in details, this is based on IEEE 112 and NEMA MG1. Double bridge instrument is recommended to get accurate resistance measurements. I know about an approach in which you calculate winding temperature rise based on the relation of copper to core losses and operating to rated current, Have you heard about it before?