15 a) What are the different types of motor ratings used in industries? Define heating time constant of a motor. Prove t

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15 a) What are the different types of motor ratings used in industries? Define heating time constant of a motor. Prove t

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15 A What Are The Different Types Of Motor Ratings Used In Industries Define Heating Time Constant Of A Motor Prove T 1
15 A What Are The Different Types Of Motor Ratings Used In Industries Define Heating Time Constant Of A Motor Prove T 1 (346.63 KiB) Viewed 58 times
15 a) What are the different types of motor ratings used in industries? Define heating time constant of a motor. Prove that the temperature rise of a motor can be expressed by 0 = 0,,(1-25) . b) The following temperature variations are observed in the temperature rise test of a DC 10 motor. After 1 hour : 15°C After 3 hours : 25°C Find out (i) the final steady temperature rise and rise time constant of the motor and (ii) the steady temperature rise after 1 hour at 50% overload, from cold. Assume that the final temperature rise on 50% overload is 90° C.
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