Model - Motor - Maps

1. Positioning and objective

The aim of the test “Characterization - Model - Motor - Maps” is to give 2D maps in J d -J q plane for characterizing the 3-Phase synchronous machines with permanent magnets.

These maps allow predicting the behavior of the electrical rotating machine at a system level.

In this test engineers will find a system integrators and / or control-command tool adapted to their needs and able to provide accurate maps ready to be used in system simulation software like Activate.

“Characterization - Model - Motor - Maps” illustration

Performance of the machine in steady state can be deduced from the results obtained in this test in association with the drive and control mode to be considered.

The following table helps to classify the test:

Family Characterization
Package Model
Convention Motor
Test Maps
Positioning of the test "Characterization - Model - Motor - Maps"

2. User inputs

Maps are mainly functions of following user inputs: the maximum value of the electrical current, the speed and the number of quadrants to be considered and the rotor position dependency.

3.Main outputs

Test results are illustrated with data, graphs and tables.

3.2 Maps in J d -J q plane

  1. Flux linkage

    • D-axis flux-linkage Φ d
    • Q-axis flux-linkage Φ q
  2. Flux linkage derivative
    • D-axis flux-linkage derivative with respect to the rotor position Φd/dθr in J_d-J_q area
    • Q-axis flux-linkage derivative with respect to the rotor position Φq/dθr in J_d-J_q area
  3. Inductance

    • D-axis inductance (dynamic, cross dynamic and static)
    • Q-axis inductance (dynamic, cross dynamic and static)
  4. Torque

    • Electromagnetic torque T em
  5. Losses

    • Stator iron losses W iron versus speed
    • Joule losses W Cus in stator winding
    • Power electronics losses
    • Amount of total losses W total versus speed

3.3 Curves

  1. Permanent magnets and cross flux effects
  2. Mechanical losses versus speed