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Widely used, asynchronous induction motors are a preferred choice for industrial applications due to their rugged construction, absence of brushes, and the ability to control the motor speed. Compact, with high-power density, Siemens high-performance induction motors are almost maintenance-free and feature an optional integrated, high-resolution measuring system for high-end speed and position control. Used in conjunction with SINAMICS S120 drives, these motors approach servo quality.

Based on a universal design succeeding the predecessor high-performance induction motor families — 1PH7, 1PH4, 1PL6, 1PM4 and 1PM6 — in one platform, the 1PH8 family replaces these products with full compatibility and even wider power and speed ranges.

Siemens 1PH8 high performance induction and main spindle motors

Compared to standard and trans norm NEMA and IEC motors, the 1PH8 motors are optimized for high-end motion control tasks utilizing variable speed drives. To achieve outstanding performance in these applications, the 1PH8 is about 30 to 40 percent smaller, resulting in lower rotor inertia and better dynamic response times.

The rated speed range of up to 6,000 rpm is enhanced with field weakening (constant power) all the way up to 20.000 rpm. The very rugged 1PH8 motors are available in IP rating 55 and 65 with a high overload capability (up to 3 times rated torque) and rotatable connectors (in the lower shaft heights) or terminal boxes. 

Special Features and Options

Key Attributes

■  Freedom for the OEM’s R&D department

The 1PH8 high performance induction motor offers 100% interface compatibility to the 1PH8 servo motor, allowing simple power upgrades from the induction design to the even higher power dense servo design.

■  Outstanding production quality

Very high-speed control capability through high-radial eccentricity and optional integrated high-resolution encoder systems

■  Easy-to-install and service

Through rotatable connectors, free choice of terminal box position and cable entry direction, electronic nameplate and free choice of air flow direction

■  Extremely space saving

With the cooling options, forced-ventilated and water-cooled, the power density is outstanding in the high-power induction motor market

Technical Data

* Depending on specific motor version and type

Typical Applications

Siemens Standard and Trans Norm NEMA and IEC Induction Motors