DIDIMO_LV Product Page:
A Dual Inverter for Low Voltage Applications

Dual 48V - 2x26kVA LEV Motor Controller


Product

Product Description

The DIDIMO LV is part of a modular inverter structure family suitable for a wide range of automotive applications, integrating functionalities available on two separate inverters into a single unit: it is the only dual inverter solution for electrified axle equipped with two 48V in-wheel or near-wheel motors on the market today. It is designed according to ISO26262 safety standard guidelines, having in mind specifically light electric vehicles (classes L5e, L6e, L7e) equipped with two 3-phase motors for automotive applications (two 3-phase permanent magnet synchronous motors (PMSM), two 3-phase brushless DC motors (BLDC), two 3-phase Induction Motors, single 6-phases PMSM motor are supported). This unique integration and modularity significantly reduces cost, space and cable connections while increasing quality and reliability compared with traditional multi ECU solutions.

Features

Motor Support
Traction inverter for 3-phase electric motors having: DC-Link: 48V (nominal), DC-Link Range: 36V - 54V, Current: 2x230A (rms continuous), 500A (rms boost), Power: 2x12kVA (continuous), 2x26kVA (boost); Power density: 14.9kVA/liter; Specific Power: 13kVA/Kg.
Support of PMSM, asynchronous, synchronous reluctance, axial or transversal flux. Full access motor control parameters and torque mapping. Easy motor specific adaption independently of motor manufacturer. In case you do not have access to the detailed technical motor specification, I&M offers to characterize the motor for you on our in-house test bench.

High Efficiency Power Electronics and Motor Algorithms
Up to 98% efficiency. Field Oriented Control (FOC) algorithm. Highest performance and maximum torque under all operating conditions and speeds with Full Field Weakening and Maximum Torque per Ampere (MTPA) support. High energy efficiency due to recuperative breaking option. Minimum motor harmonics and torque ripple.

Additional functions

  • Dedicated output signals for reverse battery polarity protection or for external relay command
  • Dedicated peak&hold output signal to drive the contactor and pre-charge relay
  • Support of vehicle management functions (VMU)

Communication
Two CAN 2.0 buses connect DIDIMO_LV with the rest of the system: battery management system and optionally more DIDIMO_LV units in slave mode. The first one is an isolated CAN, for improved reliability, the second supports remote wake-up. The CAN bus also serves as interface for SW updates, system monitoring and diagnostic checks. A 100-BaseT Ethernet connection is also available for development purposes.

Mechanical Design
DIDIMO LV mechanical housing has an aluminium base plate acting as a heatsink for the power electronic circuits, and shall be connected to a liquid cooler or an air cooler for proper functionality. The mechanical housing has been designed to fulfil the following characteristics:

  • Weight: less than 4 kg
  • Physical Dimensions (L x W x H): 277mm x 207mm x 67mm
  • Grade: IP67


More Info or Need for Customization?

In case the DIDIMO_LV functionality doesn't meets your general requirements but your specific application needs some adaptions, please contact us for further details. Due to the modular design many modifications can me made quickly and with low effort. Options include e.g. changes of nominal operating voltage, adapted body features, modified motor control algorithms etc...