MOTOR ASS’Y 75KW 400V 50HZ – Genuine Atlas Copco 1092090481 Main Drive Motor

Product Overview

The main drive motor represents the core powerhouse of any industrial compressed air system. As a genuine Atlas Copco system component, this premium 75 kW motor assembly ensures your air compressor maintains peak volumetric efficiency and stable pressure delivery under continuous-duty conditions.

Engineered exclusively for heavy-duty industrial applications, this motor assembly features a robust mechanical design tailored to withstand the severe onboard environments typical of oil-injected screw compressors. Choosing original equipment components safeguards your machinery against premature bearing wear, electrical insulation breakdown, and costly unplanned downtime.

To review the exact electrical and physical configurations of this power unit, please refer to the technical specifications outlined below.

Key Specifications

Technical Features & Design Advantages

Unlike standard off-the-shelf industrial motors, this drive unit incorporates specialized engineering enhancements specifically developed for rotary screw air compressors.

• Delivers high starting torque to handle heavy-duty compressor start-ups and frequent load-unload cycles without straining the electrical grid or triggering overload faults.
• Features IP55-rated protection alongside premium Class F insulation (evaluated under strict Class B temperature rise limitations) to resist high onboard humidity, ambient heat, and airborne dust particles.
• Utilizes reinforced heavy-duty bearings pre-lubricated with original high-temperature grease, allowing the shaft to withstand severe axial and radial forces transmitted through couplings or belts.
• Optimizes thermal dissipation via an advanced cooling fins layout, maintaining a low internal temperature rise during continuous 24/7 full-load operations.

Application & Equipment Compatibility

This original drive assembly integrates seamlessly into specific medium-to-large industrial air systems. It provides standard footprint compatibility across various manufacturing setups.

Primary Equipment Matching

• 75 kW (~100 HP) Oil-Injected Screw Air Compressors.
• Compatible with global compressor platforms sharing standardized group specifications.

Target Industries

Due to its high reliability, this motor serves demanding manufacturing environments including heavy industrial manufacturing, automotive assembly lines, cement production, textile mills, and electronic power plants where an uninterrupted supply of premium compressed air remains critical.

Professional Installation & Maintenance Guidelines

Given the precise engineering and massive physical scale of this drive assembly, field technicians must follow official engineering protocols during replacement to guarantee a maximum operational lifespan.

• Lifting Safety: Because the net weight reaches 643 kg, personnel must employ certified cranes, hoists, and lifting straps rated safely above the product weight. Never attempt manual shifting or unapproved prying, which can damage the compressor sub-base.
• Precision Alignment: Connect the motor shaft to the screw element via the flexible coupling using a laser alignment tool or dial indicators. Misalignment introduces excessive vibration, resulting in rapid coupling element failure and premature bearing destruction.
• Phase Sequence & Rotation Check: Always verify electrical wiring and check phase sequence before connecting the coupling or running the final test. Reverse rotation will cause instantaneous, catastrophic damage to the compressor screw element.

Frequently Asked Questions (FAQ)

Q1: Is this motor part number 1092090481 a genuine factory component?

Yes. This is a 100% genuine factory original equipment component manufactured at authorized production facilities. It complies fully with the official quality controls, material standards, and structural tolerances required for industrial air systems.

Q2: Can I use this motor on a 60 Hz electrical grid?

No. This specific model is rated strictly for 400V at 50 Hz. Operating a 50 Hz dedicated motor on a 60 Hz grid alters the shaft speed and cooling capabilities, which can lead to rapid motor burnout. Please contact our team if your facility utilizes a 60 Hz power supply.

Q3: Does the package include the coupling and installation hardware?

This part number represents the core motor assembly. Auxiliary drive components such as flexible coupling elements, keys, or mounting bolts generally require separate verification based on your compressor’s specific serial number layout.

Q4: How do you secure a 643 kg motor for international transit?

To eliminate logistics risks, we secure the motor inside a heavy-duty, export-grade wooden crate reinforced with steel banding. The internal structure includes protective blocking and moisture-barrier wrapping to prevent shifting or corrosion during maritime or overland transport.

Q5: How can I confirm if this motor fits my existing compressor model?

The most precise method involves checking the component part number on your original parts manual or current motor nameplate. Alternatively, you can provide your compressor unit data plate, and our technical staff will cross-reference the system layout for you.

Request a Technical Consultation

Maintaining the integrity of your compressed air infrastructure requires verified system compatibility. If you need to replace your main drive assembly, please contact our technical sales department to verify your specific machine serial number and obtain an official quotation.

If you need other Atlas Copco air compressor motors, we provide more models in the table below or you can submit your requirements to us directly.