DS5381 Low Voltage Electronic Load Unit (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. Thanks to energy recuperation during operation, it is highly efficient. DS5381 can be connected to dSPACE Simulator and SCALEXIO.  

This dSPACE Electronic Load Unit 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 enables emulation of 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.

The load unit 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. Typical test application areas are electrically supported steering, starter and generator systems, and mild hybrid drives.

Key Features

  • 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 Electronic Load Module DS5381 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 that circulates between the ECU and the DS5381 Electronic Load Module can be much higher than the fed-in power of the DC supply unit. This energy recuperation significantly increases the energy efficiency of the overall system. To boost the overall system power, multiple loads can be operated in parallel to achieve higher electric currents.


DS5381 Electronic Load Module Data Sheet

Parameter Specification
Control supply voltage 12 V
Control supply current consumption 3.8 A (includes fans at full speed)
Load supply voltage (battery voltage) for operation 6 ... 60 V
Load supply current consumption Approx. 20% of the nominal load current (48 V battery voltage / 50 Arms motor phase current on 3 phases)
Internal DC-link voltage 16 - 80 V
Motor phase current 0 - 50 Arms continuous, 100 A peak
Maximum power output (three-phase motor simulation) 3,300 W
Dimensions 483 x 88 x 645 mm (19.0 x 3.5 x 25.4 in)
Weight 15.5 kg

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