YE2 IE2 High Efficiency AC Gear Motor | Three Phase Induction Motor

Product Overview

The YE2 (also designated IE2 under the international efficiency classification) is a cast-iron-housing three phase motor built from a clean-sheet design optimized for energy efficiency. It reaches IE2 (high efficiency) levels across the full power range — from a compact 0.18 kW unit for instrument drives all the way up to 450 kW units powering industrial blowers and centrifugal pumps. Compared to older Y and Y2 series motors that populated Korean factories for decades, the YE2 delivers the same mechanical output while drawing measurably less current from the supply, thanks to improved stator and rotor lamination steel, optimized slot geometry, and tighter manufacturing tolerances on the air gap.

The cast-iron housing gives the YE2 a durability advantage in heavy industrial settings where aluminum frames might suffer physical damage from forklift traffic, falling objects, or chemical exposure. Iron castings also provide superior vibration damping — the higher mass and stiffness of iron naturally absorbs rotor-induced vibration before it reaches the machine frame. This characteristic matters on precision equipment such as CNC lathes, surface grinders, and coordinate measuring machines where even micro-level vibration can affect workpiece quality.

Korea Ever-Power stocks the most commonly ordered YE2 models at our regional warehouse, enabling single-week delivery for urgent replacements. For bulk fleet upgrades — a common request from manufacturing plants replacing entire lines of legacy Y-series ac motors — we offer project pricing and coordinated delivery scheduling that aligns with your planned shutdown windows.

Technical Specifications

The complete performance table below covers 2-pole (3000 r/min synchronous speed) variants. Multi-voltage columns (380 V, 400 V, 415 V) allow buyers to confirm rated current at the supply voltage used in their facility. Additional pole configurations (4P, 6P, 8P) are available — contact us for the extended datasheet.

Core Advantages of the YE2/IE2 Motor

The YE2 platform was designed to hit a specific sweet spot: higher efficiency than legacy motors, rugged enough for the worst factory environments, and priced to make fleet-wide upgrades financially viable. Here are the practical strengths that Korean buyers value most.

1. IE2 Efficiency Across the Full Range — Every model from 0.18 kW through 450 kW meets or exceeds IE2 thresholds under IEC 60034-30-1. On a 30 kW motor running 6 000 hours per year, the efficiency gain over an older Y-series motor saves approximately 3 000 kWh annually — enough to pay back the price difference within 12 to 18 months at typical Korean industrial electricity rates.
2. Cast-Iron Durability — The gray cast-iron housing handles the knocks, vibrations, and chemical splashes of real factory floors. Unlike aluminum alternatives, iron does not dent from incidental contact and offers natural corrosion resistance when properly primed and painted. The standard finish passes a 300-hour salt-spray test.
3. Low Vibration and Noise — Precision rotor balancing (ISO 21940-11 Grade G2.5) and optimized fan blade profiles keep both mechanical vibration and airborne noise below the limits set by IEC 60034-14 Grade A. Workers on adjacent stations benefit from a quieter environment, and vibration-sensitive downstream processes run more consistently.
4. Strong Starting Torque — The YE2 retains a high locked-rotor torque ratio (Tst/Tn up to 2.2 on most models) despite the improved efficiency. This means the motor can start heavy loads — loaded conveyors, positive-displacement pumps, screw compressors — without requiring a reduced-voltage starter or a VFD for the start-up phase alone.
5. IEC-Standard Frame Dimensions — Foot mounting holes, shaft diameters, and flange patterns follow IEC 60072. The YE2 drops directly into mounting positions designed for any IEC-compliant motor of the same frame size, including older Y and Y2 series units.

Energy Efficiency and Cost Savings

Replacing an older electric motor with the IE2-rated YE2 generates real, measurable savings. The magnitude depends on motor size, load factor, operating hours, and local electricity price. Below is a worked example for a typical Korean manufacturing scenario.

At 384 000 KRW saved per motor per year, a plant replacing 20 old motors recovers the entire purchase cost of the new YE2 fleet within roughly 18 months. After that payback period, the savings flow directly to the operating budget. For plants running three shifts (8 000+ hours per year), the payback period drops to about 12 months. These calculations use conservative full-load figures; actual savings at partial load may be slightly higher or lower depending on the specific load profile. Our engineering team can provide a customized energy-savings estimate based on your actual operating data — send us your motor nameplate photos and average load readings, and we will return a detailed payback analysis within two business days.

Selection Guide for High Efficiency AC Motors

Picking the right YE2 model for your application involves confirming a handful of key parameters. Getting these right at the quotation stage avoids costly returns and re-orders later.

1. Output Power — Determine the mechanical power (kW) your driven equipment requires at its operating point. If replacing an existing motor, check whether the old unit was oversized — running a motor below 50 % load reduces both efficiency and power factor. Right-sizing the replacement to match the actual load improves overall system efficiency.
2. Supply Voltage — The performance table lists rated currents at 380 V, 400 V, and 415 V. Confirm your facility supply voltage and select the matching column. For 440 V or 480 V supplies common in some Korean industrial parks, request a custom winding specification.
3. Pole Count and Speed — 2-pole (3000 r/min), 4-pole (1500 r/min), 6-pole (1000 r/min), and 8-pole (750 r/min) variants are available. Match the motor speed to the driven equipment requirement, accounting for any gearbox ratio in the drive train.
4. Mounting Configuration — The YE2 supports B3 (foot mount), B5 (flange mount), and B35 (foot + flange) arrangements. Confirm the mounting type used on your existing installation to avoid modification work.
5. Environment — Standard YE2 motors are rated for ambient temperatures up to 40 °C and altitudes up to 1 000 m. High-altitude or high-temperature applications require derating or enhanced cooling arrangements.

Why Choose Korea Ever-Power

• Factory-direct pricing — no distributor margins between you and the manufacturer.
• Korean warehouse stocking popular frame sizes for fast emergency delivery (typically 5 to 7 working days).
• Bulk fleet-replacement pricing for orders of 10 units or more, with coordinated delivery scheduling.
• Free motor selection service — send us your old motor nameplate photo and we confirm the exact YE2 replacement model.
• Full certification packages (ISO 9001, CE, CCC) included with every shipment.
• 18-month warranty on materials and workmanship; spare-parts depot in Korea for fast support.
• Engineering support in Korean and English via phone, email, and KakaoTalk.

Related and Complementary Products

The YE2 often connects to a speed reducer when the driven equipment needs a shaft speed lower than the motor output. A worm gear reducer provides cost-effective single-stage reduction with a right-angle output, while a planetary gearbox delivers higher mechanical efficiency for demanding applications. For belt-free, direct-coupled installations requiring precise speed matching, a variable speed ac gear motor from our VFD-ready range may be the better option. Chain and sprocket and chain assemblies are also available for applications with shaft offset requirements.

Frequently Asked Questions

What is the difference between IE2 and IE3 efficiency standards?
IE2 (High Efficiency) and IE3 (Premium Efficiency) are tiers defined by IEC 60034-30-1. IE3 motors have lower losses and draw less current at the same output power. The YE2 meets IE2; for IE3 performance, refer to our YE3 series. The price premium for IE3 is typically 15 % to 25 % higher, with a correspondingly faster energy-savings payback.

Can the YE2 motor run on a frequency inverter?
Yes. The cast-iron housing and Class F insulation handle the additional heating caused by VFD harmonics. For extended operation below 25 Hz, add an external forced-ventilation kit to maintain adequate cooling. The winding insulation system is rated for 1 000 V peak voltage, which covers most standard VFD output waveforms up to 400 V supply.

Is the YE2 suitable for food-processing environments?
The standard cast-iron YE2 is suitable for general food-processing areas that do not require washdown certification. For facilities subject to high-pressure washdown, consider the YS aluminum series with optional powder coating, or request our IP56 upgrade kit for the YE2 frame.

What maintenance does the YE2 require?
Standard bearing re-greasing every 5 000 to 8 000 hours depending on speed and load. Clean the fan cover intake grille every 1 000 hours in dusty environments. Perform an insulation resistance test annually. The cast-iron construction is inherently durable and does not require special corrosion treatment unless the motor is installed in a chemically aggressive atmosphere.

How do I order a replacement for a motor with a non-standard shaft length?
Send us the required shaft dimensions (diameter, length, keyway size). Our factory machines custom shafts within 5 working days of order confirmation. Standard IEC shaft dimensions ship from stock.

Customer Reviews

Kim Jong-sik, Maintenance Manager, Changwon (late 2024)
"Replaced 14 old Y-series motors on our stamping line with YE2 units over a three-month window. The energy savings showed up on the electricity bill almost immediately. Motors have been running trouble-free for eight months now."

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Oh Ji-won, Operations Director, Gyeonggi-do (early 2025)
"We needed 30 kW and 45 kW motors for two new centrifugal pumps. Delivery was 9 days. The cast-iron build quality feels solid, and the vibration readings during commissioning were better than the spec sheet promised. The project coordinator kept us updated at every step."

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Hwang Tae-hee, Procurement Specialist, Seoul (mid 2024)
"We compared the YE2 against three imported brands. The performance specs matched, but the price was 40 % lower. We started with a trial order of 5 units. After six months of clean operation, we switched our entire approved supplier list to include Ever-Power."

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Shin Won-ho, Plant Engineer, Busan (late 2024)
"Running a YE2-200L-4 on a cooling tower fan. The motor replaced a 15-year-old unit that was drawing 12 % more current at the same airflow. Temperature rise on the new motor is about 15 degrees lower. Easy swap — same frame, same feet."

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Jang Eun-seo, Factory Manager, Daegu (early 2025)
"Small factory, tight budget. I bought one IE2/YE2-100L-4 (3 kW) to try on a dust collector fan. Works fine, the motor is quieter than the old one, and I can tell the current draw is lower because the circuit breaker no longer trips on hot days. Planning to replace two more this quarter."

Packing and Shipping