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Motor o'rash qarshiligini hisoblash kalkulyatori
O'rama qarshiligi o'lchash natijalarini harorat farqi bo'yicha tuzating. Mis va alyuminiy o'ramalari uchun qo'llab-quvvatlaydi. 3-fazali nomutanosiblikni tekshirishni o'z ichiga oladi — fazalar o'rtasida >2% bo'lsa, muammo mavjudligini bildiradi.
Results
Haroratni tuzatish formulasi
O'tkazgich qarshiligi harorat bilan chiziqli ravishda o'zgaradi. Standart tuzatish formulasi quyidagicha:
- R₁ — measured resistance at temperature T₁
- R₂ — T₂ maqsad haroratida tuzatilgan qarshilik
- k — material konstantasi: mis uchun 234,5, alyuminiy uchun 225,0
Material xususiyatlari
| Material | α at 20°C (1/°C) | k constant | ρ at 20°C (Ω·m) |
|---|---|---|---|
| Mis (tavlanган) | 0.00393 | 234.5 | 1.724 × 10⁻⁸ |
| Aluminum | 0.00403 | 225.0 | 2.650 × 10⁻⁸ |
Fazalar qaршилиги muvozanatsizligi
3 fazali motorlar uchun fazalar orasidagi qarshilikni solishtiring:
- < 1% — A'lo, normal holat
- 1–2% — Qabul qilinadi, kuzatib boring
- > 2% — Muammo: o'ramlarning qisqa tutashuvi, zaif ulanishlar yoki chulg'am degradatsiyasi ehtimoli
- > 5% — Jiddiy: motor ta'mirlash uchun ishdan chiqarilishi kerak
⚠️ Important: All three phase readings must be taken at the same temperature. Allow the motor to reach thermal equilibrium (at least 30 minutes idle for large motors) before measuring.
Tip: For motors measured hot after running, you can back-calculate the winding temperature: T_hot = (R_hot/R_cold) × (k + T_cold) − k. This helps assess insulation thermal class loading.
Professional dala balansirovka asboblari va dasturiy ta'minot. 50dan ortiq mamlakatda qo'llaniladi.
