4-పోల్, 3-ఫేజ్ IM పౌన:పున్యం 50 Hzతో సరఫరా ద్వారా పనిచేస్తుంది. స్టేటర్ యొక్క అయస్కాంత క్షేత్రం తిరిగే వేగాన్ని లెక్కించండి.

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ALP CBT 2 Electrician Previous Paper: Held on 23 Jan 2019 Shift 1
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  1. 90 rpm
  2. 1500 rpm
  3. 1440 rpm
  4. 600 rpm

Answer (Detailed Solution Below)

Option 2 : 1500 rpm
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Detailed Solution

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భావన:

3-ϕ ఇండక్షన్ మోటారులో, స్టేటర్ యొక్క అయస్కాంత క్షేత్రం సమకాలిక వేగంతో తిరుగుతుంది.

అలాగే, \({N_S} = \frac{{120f}}{P}\)

ఇక్కడ,

NS = rpmలో సమకాలిక వేగం

f = Hzలో సరఫరా పౌన:పున్యం

P = ధ్రువాల సంఖ్య

గణన:

స్టేటర్ యొక్క అయస్కాంత క్షేత్రం NS వద్ద తిరుగుతుంది

∴ \({N_S} = \frac{{120 \times 50}}{4} = 1500\;rpm\)

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