एक 4 - ध्रुव वाला 50 Hz प्रेरण मोटर 1455 rpm पर चलता है। तो सर्पी गति क्या है?

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ISRO IPRC Technical Assistant Mechanical 28 Aug 2016 Official Paper
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  1. 55 rpm
  2. 50 rpm
  3. 45 rpm
  4. इनमें से कोई नहीं 

Answer (Detailed Solution Below)

Option 3 : 45 rpm
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संकल्पना:

तुल्यकालिक गति (Ns) और रोटर गति (Nr) के बीच की गति में अंतर सर्पी गति कहलाता है। इसे निम्न द्वारा ज्ञात किया गया है:

सर्पी गति = Ns - Nr

तुल्यकालिक गति को निम्न द्वारा ज्ञात किया गया है:

\({N_s} = \frac{{120 \times f}}{p} \)

जहाँ f आवृत्ति है और p ध्रुवों की संख्या है। 

गणना:

दिया गया है:

p = 4 और f = 50 Hz

\({N_s} = \frac{{120 \times f}}{p} = \frac{{120 \times 50}}{4} = 1500\;rpm\)

सर्पी गति = Ns - Nr = 1500 - 1455

सर्पी गति = 45 rpm

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