MRT 1 – Fully Integrated Rotor Transmission

From 50kW to 80kW output power

  • Couple transmission with Hi-PermMag series motors / Reluctancy motors
  • Suitable for applications with extremely high power and torque at low and medium voltages.
  • Output power spans from 50kW to 80kW.
  • Superior efficiency (peak and curve shape) optimized for specific application.

MRT 1

From 50kW to 80kW output power

PRODUCT DESCRIPTION

Since doesn’t exist one electric motor that optimally fits on all vehicles until today everyone has worked around the electric motor and the transmission to maximize the overall efficiency of the electric vehicle. To do this the customization was speci-fic for each application and each specific working cycle. IET working around e-motors in its R&D and Engineering depart-ment has designed, developed and then patented the MRT™ (Multiple Rotor Transmission).

MRT™ has been designed coupling two or more different e-motors and a gearbox with a unique output shaft. In this way has been reached an efficiency level previously unimaginable in a wider range of use cases and in a more safe and reliable way. After the production of MRT™ and the development of INTEGRALE, IET considered to apply the solution of coupling transmission and e-motors also to a “mono” rotor transmission. In this way the solution have the same advantages of “multi-ple” rotor transmission, but is suitable for applications that requires low power/torque and high efficency.

This advantage can be spent to reach:

  • Better efficiency at the same power;
  • Lower cooling requirements;
  • Top range power/weight ratio;
  • Power spans from 50 to 80kW.
  • Patented selective power and thermal management;
  • Lower cooling requirements;
  • LOW voltage HIGH power available;
TECHNICAL SPECIFICATIONS
MRT 1 – 40kW MRT 1 – 80kW
DC Bus Voltage: 96Vdc 96Vdc
Power train: MRT™ power train patented Full electric system MRT™ power train patented Full electric system
Electric motors: 1 x Permanent Magnet AC (PMAC) 3 phase Hi-Perm-Mag series 1 x Reluctance Electric Motors (SRIPM) 3 phase
Power: 40 kW + Peak (Output Shaft) 80 kW + Peak (Output Shaft)
Gear ratio: 35/110 35/110
Torque at output shaft: 178Nm maximum 580Nm maximum
Electric power train mass:  ≤55kg ≤90kg
Coolant: Liquid cooled Liquid cooled
Motor efficiency: ≥90% ≥90%
Operating temperature: -25° C + 50° C -25°C +50°C
Protection Level (IP): IP67 IP67
MEDIA GALLERY

Application

FULLY ELECTRIC CITY BUS

AGRICULTURAL APPLICATION

ELECTRIC AND COMBUSTION a VEHICLE

MRT 2 – Fully Integrated Rotor Transmission

From 100kW to 150kW output power

  • Combine multiple motors of the Hi-PermMag series / Relutancy motors

  • Suitable for applications with extremely high power and torque at low and medium voltages.

  • Output power spans from 100kW to 150kW.

  • Superior efficiency (peak and curve shape), optimized for specific application.

  • Very effective thermal management.

MRT 2

From 100kW to 150kW output power

PRODUCT DESCRIPTION

Starting from the new INTEGRALE and with the experience of the previous MRT2 Series, the natural evolution has been design the new MRT2 composed by two motors coupled with a transmission. Each motor that compose the MRT™ can operate at low voltages with the same performances and efficiency of a power equivalent single motor that works at high voltages. The result is a more safe system. The adjustable transmission ratio, possible for each motor, allow to match the required torque and speed needs.

MRT™ can be equipped with e-motors using different types of permanent magnet motors, taking the advantages of each one. This innovative system has an intrinsically redundant architecture that allows, for example, with a 2 motor MRT™, even in case of the failure one of the motors, the system work (with reduced performances). MRT™ has a better thermal management, because the surface of the system is averagely 1,5 times the surface of a single motor that fits in the same volume.

This advantage can be spent to reach:

High power density;
Better efficiency at the same power;
Top range power/weight ratio;
Less mass than single rotor;
Power spans from 100 to 160kW.
Better thermal management (+150% surface);
Lower cooling requirements;
LOW voltage HIGH power available;
Different rotors transmission ratios.

TECHNICAL SPECIFICATIONS
MRT 2 – 80kW MRT 2 – 160kW
DC Bus Voltage: 96Vdc 96Vdc
Power train: MRT™ power train patented Full electric system MRT™ power train patented Full electric system
Electric motors: 2 x Permanent Magnet AC (PMAC) 3 phase Hi-Perm- Mag series 2 x Reluctance Electric Motors (SRIPM) 3 phase
Power: 80 kW + Peak (Output Shaft) 160 kW + Peak (Output Shaft)
Gear ratio: 35/110 35/110
Torque at output shaft: 178Nm maximum 580Nm maximum
Electric power train mass:  ≤55kg ≤90kg
Coolant:   Liquid cooled Liquid cooled
Motor efficiency:  ≥90% ≥90%
Operating temperature: -25° C + 50° C -25°C +50°C
Protection Level (IP): IP67 IP67
MEDIA GALLERY

Application

FULLY ELECTRIC CITY BUS

AGRICULTURAL APPLICATION

ELECTRIC AND COMBUSTION a VEHICLE