Danfoss EM-PMI300-T310 — High-Efficiency Permanent Magnet Electric Motor / Generator

Danfoss EM-PMI300-T310 is a compact, high-performance electric machine based on Synchronous Reluctance assisted Permanent Magnet (SRPM) technology. Designed specifically for demanding applications, it combines high efficiency, excellent torque capability, robust construction, and flexible installation options.

With a nominal efficiency of approximately 96%, liquid cooling, and an IP65-rated enclosure, the EM-PMI300-T310 is well suited for electric and hybrid powertrains, heavy mobile machinery, traction systems, and generator applications. 

Electric-Machine-PMI300-T310.pdf

Key Features

• Up to 96% nominal efficiency
• Advanced SRPM technology
• High starting torque — capable of producing full torque instantly at a non-rotating shaft
• Peak motor torque up to 700 Nm
• 500 VAC nominal voltage
• Inverter-fed operation
• Liquid cooling with water or water/glycol mixture
• Minimum coolant flow: 10 l/min
• Maximum coolant temperature: +65°C
• Minimum ambient temperature: −40°C
• IP65 protection class
• Multiple mounting possibilities
• Compact dimensions: approximately 377 mm length × 408 mm diameter
• Standard unit weight: approximately 125 kg 

Typical Applications

The EM-PMI300-T310 is designed for a wide range of industrial and mobile applications, including:

• Traction and propulsion systems
• Heavy mobile machinery
• Diesel-electric systems
• Serial hybrid applications
• Parallel hybrid powertrains
• Electric motor applications
• Generator applications
• Starter motor operation for internal combustion engines (ICE)

Danfoss specifically developed the machine to be smaller, lighter, and more efficient than conventional solutions for demanding applications. 

Electric-Machine-PMI300-T310.pdf

Available Speed Versions

The EM-PMI300-T310 series is available in several configurations:

1100 / 1300 / 1600 / 2200 / 2800 / 3200 rpm

Depending on the selected version and coolant temperature, motor configurations provide continuous torque of up to 399 Nm and peak torque of 700 Nm. Generator configurations are available with continuous output up to 145 kW. 

Mounting & Cooling

The standard configuration features an SAE 4 flange and DIN 5480 W50x2x24x8f spline shaft. The liquid-cooling system requires a minimum flow of 10 l/min and can operate with plain water with an appropriate corrosion inhibitor or a suitable water/glycol mixture.

The compact and robust design makes the EM-PMI300-T310 particularly suitable for installations where space, weight, reliability, and power density are critical.

Available Options

Depending on the required configuration, available options include:

• Built-in non-contacting resolver
• Insulated bearings
• Additional PT100 winding temperature sensors
• Low-voltage connection box and terminal strip
• Anti-condensation heater
• Alternative N-end flange and shaft configurations
• Marine classification options including ABS, Bureau Veritas, DNV, Lloyd’s Register, and RINA 

Electric-Machine-PMI300-T310.pdf

Danfoss EM-PMI300-T310 is an excellent choice for OEMs, system integrators, and industrial applications requiring a compact, efficient, and robust electric motor or generator for demanding operating environments.

Specifications, power output, torque, speed, and available options depend on the selected EM-PMI300-T310 configuration.