PWM Measurement Solution

Capturing of PWM signals
  • High-precision digital capturing of 3-phase PWM signals
  • Fast signal measurement and analysis

dSPACE offers you a PWM measurement solution based on the DS5202 FPGA (field programmable gate array) Base Board. It is specially designed for high-precision digital capturing of 3-phase PWM signals such as those typically used for controlling a 3-phase AC electric motor. Efficient testing of electronic control units (ECUs) for electric machines requires fast measurement and analysis of several closely associated signals. The challenge is to capture these signals with a very short sample time, e. g. < 20 µs.

Use Case
A typical use case is a hardware-in-the-loop (HIL) simulation, where the electric motor including the electronic power stage is simulated by means of the dSPACE modular real-time hardware. Simulation models like dSPACE Automotive Simulation Models - ASM Electric Components Library are used for simulating electric components. The gate driver signals (typically PWM signals) coming from a controller are measured by the DS5202 PWM measurement solution, and calculated motor current signals are sent back to the controller by means of analog voltage signals.