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DS5381 Electronic Load Module (Voltage Range: 60 V)

Electronic load module for the HIL simulation of electric machines

DS5381 Electronic Load Module emulates electric machines during hardware-in-the-loop simulation. The module is perfect for emulating three-phase electric motor units. Due to energy recuperation during operation, it is highly efficient. DS5381 can be connected to dSPACE Simulator and SCALEXIO.

This DS5381 Electronic Load Module emulates motor and generator currents at voltages of up to 60 V for the hardware-in-the-loop (HIL) simulation of electric motors. Highly dynamic switching between the current and voltage control modes makes it possible to emulate floating brushless DC (BLDC) motor phases without additional booster components. With a voltage range of up to 60 V, the module is also ideal for use with higher onboard vehicle voltages of 48 V.
One load unit based on the DS5381 consists of three load modules and one power module. Thanks to this setup, only one load unit is required to emulate a three-phase electric motor. Energy recuperation is also included to boost the energy efficiency of the overall system. Typical test application areas are electrically supported steering, starter and generator systems, and mild hybrid drives. Several loads can be operated in parallel to achieve higher electric currents. 

Power Recovery

The DS5381 Electronic Load Module uses the same supply voltage as the device under test, e.g., the ECU. It is equipped with bidirectional working voltage regulators so that the current that is sunk on one pin can be sourced to another pin. This means that the effective power which circulates between the ECU and the DS5381 Electronic Load Module can be much higher than the infeed power of the DC supply unit.

Operation Modes

The DS5381 Electric Load Module can be operated in three different modes:

  • Current control mode (typically used for motor applications, not BLDC motors)
  • Voltage control mode (general-purpose applications)
  • Mixed current and voltage control mode (BLDC motor applications)

The mode parameter can be set from the host via protocol or via discrete I/O for dynamic configuration during real-time simulation.

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