MTB – Motor testbench

The MTB block is a simulation model included in the Imperix Power library. It models the imperix motor testbench in Simulink and PLECS simulation.

For more information regarding the Imperix Power library, please read Getting started with Imperix Power library.

Modeling of MTB

The Motor Testbench features a squirrel cage Induction Machine (IM) and a Permanent Magnet Synchronous Machine (PMSM). One machine is the device under test while the other one acts as a controllable load. The schematic is shown below.

The MTB model has one modeling level:

• (A) Simple

For more detailed model parameters and measurement results, please contact [email protected].

Machine parameters

All the parameters of the machines are summarized in the following tables.

Sensors

The motor testbench features an angle resolver and a torque sensor. The angle resolver is modeled by an ideal sensor with the angle initialized at 0, while the torque sensor is modeled by an ideal sensor with a 1kHz low-pass filter.

Simulink MTB block

Port specification

• The output T is the measured torque.
• The output θ is the measured rotor angle.
• The connection ports im.A,im.B,im.C are the electrical ports connected to the three-phase AC input of the IM.
• The connection ports pmsm.A,pmsmm.B,pmsm.C are the electrical ports connected to the three-phase AC input of the PMSM.

Parameters

• Modeling level selects the modeling level.

PLECS MTB block

Port specification

• The output T is the measured torque.
• The output θ is the measured rotor angle.
• The connection ports im.A,im.B,im.C are the electrical ports connected to the three-phase AC input of the IM.
• The connection ports pmsm.A,pmsmm.B,pmsm.C are the electrical ports connected to the three-phase AC input of the PMSM.

Parameters

• Modeling level selects the modeling level.
• PMSM model selects the model of PMSM. The PMSM can be either implemented in the rotor reference frame or as a voltage behind reactance.

Probe signals

The following signals can be monitored by a Probe block in PLECS.

• Torque [Nm] monitors the torque sensor output in Nm.
• Rotor position [rad] monitors the rotor position in rad.