Work. Pt.  Sine wave  Motor  I U
1. Positioning and objective
The aim of the test “ Working point – Sine wave – Motor – I, U” is to characterize the behavior of the machine when operating at the working point which is targeted by the user. It corresponds to the base point at the imposed maximum line current and maximum LineLine voltage.
The base point of the torquespeed curve is defined by considering the targeted input values I, U (Voltage, current). Then, this test allows deducing the performance for this working point.


Working point – Sine wave – Motor – I, U  Illustration 
The results of this test give an overview of the electromagnetic analysis of the motor considering the machine topology.
The general data of the machine, like machine constants, power balance and magnet behavior are computed and displayed.
The magnetic flux density is also computed in every region of the machine’s magnetic circuit to evaluate the design.
In addition, ripple torque at the base speed point is computed.
The following table helps to classify the test “Working point – Sine wave – Motor – I, U”.
Family  Working point 
Package  Sine wave 
Convention  Motor 
Test  I, U 
Positioning of the test “Working point – Sine wave – Motor – I, U” 
2. User inputs
The main user input parameters are the maximum allowed supplied LineLine voltage and line current. In addition, temperatures of winding and magnets must be set.
3. Main outputs
Test results are illustrated with data, graphs and tables
3.1 Tables of results

Machine performance – Base speed point
 General data
 Machine constants
 Power balance
 Flux in airgap
 Flux density in iron
 Magnet behavior including evaluation of demagnetization rate
 Maximum speed estimation

Power electronics
 Inverter
 Working point

Ripple mechanical torque
 Working point
3.2 Curves
 Ripple mechanical torque versus rotor angular position
 Mechanical torque versus current and control angle
 Flux density in airgap versus rotor angular position