Zana ya Uhandisi Isiyolipisha
Kusimbua Chapa ya Jina ya Injini
Weka data ya pleti ya motor na ufafanue kila sehemu. Hesabu kasi ya usawaziko, mtelemko, ufanisi, torque, na uelewa maana ya darasa la insulation, ukadiriaji wa IP, mzunguko wa kazi, na ukubwa wa fremu.
Tafsiri ya Bamba la Vipimo
Kasi ya Synchronous
ns = 120 × f / p, ambapo f ni masafa (Hz) na p ni idadi ya nguzo.
Slip
s = (ns − n) / ns × 100%, ambapo n ni RPM ya kawaida. Mtelemko wa kawaida: 2–5% kwa injini za kawaida.
Torque
T = P × 9550 / n (Nm), ambapo P ni nguvu kwa kW na n ni RPM.
Efficiency
η = Pout / Pin = P / (√3 × V × I × cos φ). Can be estimated from nameplate data.
Madaraja ya Insulation
| Class | Joto la Juu la Winding | Mazingira + Ongezeko + Hotspot |
|---|---|---|
| A | 105°C | 40 + 60 + 5°C |
| E | 120°C | 40 + 75 + 5°C |
| B | 130°C | 40 + 80 + 10°C |
| F | 155°C | 40 + 105 + 10°C |
| H | 180°C | 40 + 125 + 15°C |
Madaraja ya Ufanisi ya IE (IEC 60034-30-1)
| Class | Level | Min. η (example: 11 kW, 4-pole, 50 Hz) |
|---|---|---|
| IE1 | Standard | 87.6% |
| IE2 | High | 89.8% |
| IE3 | Premium | 91.4% |
| IE4 | Super Premium | 93.3% |
| IE5 | Ultra Premium | ~94.6% (indicative) |
IE1–IE4 values are the nominal efficiency limits of IEC 60034-30-1:2014 for this one example rating (11 kW, 4-pole, 50 Hz) — limits differ for every power rating, pole count and frequency. IE5 was only informative in the 2014 edition (Annex A, ~20% lower losses than IE4); normative IE5 limits were introduced in IEC 60034-30-1:2025 — the IE5 figure shown is indicative.
Maelezo ya Kiwango cha IP
IP stands for Ingress Protection. First digit = solids protection (0–6), second digit = water protection (0–9).
- IP55 — Kinga dhidi ya vumbi, hifadhiwa dhidi ya mito ya maji kutoka pande zote
- IP65 — Imezuia vumbi kabisa, hifadhiwa dhidi ya mito ya maji
- IP66 — Imezuia vumbi kabisa, hifadhiwa dhidi ya mito ya maji yenye nguvu
Sawazisha motors mahali pa kufanyia kazi na gundua hitilafu za umeme/mitambo kwa zana za kitaalamu.
