L1e-L3e Motor and Body Controller

48V – 7,1kVA boost Integrated Body-Motor Controller (IBMC)

The IBMC48V140A1 fills a market gap by offering a fully integrated motor – body control solution for 48V operated L1e-L3e vehicles.

It was designed specifically with (S-)Pedelec, E-cargo bikes, e- Mopeds in mind. Support for both hub and central motors equipped with Hall or encoder position sensor.

The integrated body module processes all input/output signals from torque sensor to brake, motor signals, switches, lights and the display communication.

The IBMC48V140A1 is offered in a standard version for vehicles with top speeds <= 45km/h.

This unique integration significantly reduces cost, space and cable connections while increasing quality and reability compared with traditional multi ECU solutions

Motor support

Traction inverter for 3-phase electric motors having: DC-Link: 48V (nominal), DC-Link Range: 36V – 54V, Current: 50A (rms continuous), 140A (rms boost for 10s), Power: 6,3kVA (continuous), 7,1kVA (boost). Support for multiple motor types (eg.: PMSM, TFM, BLDC…). Full access to motor control parameters and torque mapping.

Flexible support of position sensors and interfaces including digital Hall sensors and encoders.  Support for motor temperature sensors.

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

  • Master/slave configuration for multiple motor drive.
  • Diagnostic and system protection against over-voltage, over-current, over-temperature.
  • Controlled derating in case of system protection.
  • Vehicle management.
  • Body Motor Controller:
    • Dedicated outputs for lights, horn, and charging.
    • Inputs for torque sensor, switches and brake, sensors.
  • Range estimation (via BMS communication) and battery supervision.


A CAN 2.0 bus up to 1Mbit/s connects the IBMC to display, BMS, auxiliary devices and optionally more IBMC units in slave mode. The communication to BMS ensures adavanced range estimation and battery supervision features. The same CAN bus also serves as interface for SW updates (readiness for diagnostic checks supported by UDS (Unified Diagnostic Services) protocol).

Mechanical Design

IBMC48V140-1 doesn’t have any specific mechanical housing; I&M standard or customer specific aluminium base plate, acting as a heatsink for the power electronic circuits, shall be connected either to chassis or to an air cooler for proper functionality.

The IBMC48V140A1, including I&M standard aluminium base plate, has been designed to fulfil the following characteristics:

  • Weight: 650g
  • Dimensions (LxWxH): 403x62x27mm
  • Grade: IP65

Customization Required?

In case the IBMC functionality meets your general requirements but your specific application needs some adaptions please contact us. Due to the modular design many modifications can me made quickly and with low effort. Options include e.g. changes of nominal operating voltage to 60V or 72V, adapted body features, modified motor control algorithms etc.

Contact us and learn more

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