Work. Pt.  Sine wave  Motor  I PSI N
1. Positioning and objective
The aim of the test “ Working point – Sine wave – Motor – I, Ψ , N” is to characterize the behavior of the machine when operating at the targeted input values I, Ψ, N (Magnitude of current, Control angle, Speed).
These three inputs are enough to impose a precise working point.
For instance, a working point can be chosen on the efficiency map, by identifying the current, the control angle and the speed with different curves or maps displayed in the “Performance mapping / Sine wave / Motor / Efficiency map” test.
Then, the “Working point – Sine wave – Motor – I, Ψ, N” test allows to compute the performance for this working point.

“Working point – Sine wave – Motor – I, Ψ, N ” illustration 
The results of this test give an overview of the electromagnetic analysis of the machine considering its topology.
The general data of the machine, like machine constants, power balance and magnet behavior are computed and displayed. The motor convention is used to build the model.
The magnetic flux density is also computed in every region of the machine’s magnetic circuit to evaluate the design.
Two computation modes are available:
 “Fast computation mode” is perfectly suited for the predesign step (Hybrid model based on MagnetoStatic Finite Element computations and Park transformation theory)
 “Accurate computation mode” is perfectly suited for the final design step (Pure Finite Element modeling based on transient computations)
It also gives the capability to make comparisons between the results obtained from the measurements and those obtained with our computation processes .
When both the following conditions are met, this test allows to perform electromagnetic computations with coupled thermal analysis.
 The type of machine is Synchronous Machine with Permanent Magnets with Inner rotor
One of the two following thermal solving modes is selected: One iteration or iterative solving mode
The following table helps to classify the test “Working point – Sine wave – Motor – I, Ψ, N”.
Family  Working point 
Package  Sine wave 
Convention  Motor 
Test  I, Ψ, N 
Positioning of the test “Working point – Sine wave – Motor – I, Ψ, N” 
2. User inputs
The four main user input parameters are the supply line current, control angle, speed, and the computation mode. In addition, temperatures of winding and magnets must be set.
3. Main outputs
Test results are illustrated with data, graphs and tables
3.1 Main 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

Power electronics
 Inverter

Working point

Ripple mechanical torque

Working point

Thermal data
 Table of temperatures

3.2 Curves – in the “Fast computation modes”
 Ripple mechanical torque versus rotor angular position
 Flux density in airgap versus rotor angular position
 Chart of temperature (radial and axial views)
3.3 Curves – in the “Accurate computation modes”
 Mechanical torque versus rotor angular position
 Mechanical torque harmonic analysis
 Flux density in airgap versus rotor angular position
 Flux density in airgap harmonic analysis
 Phase voltage versus rotor angular position
 Phase voltage harmonic analysis
 Phase current versus rotor angular position
 Phase current harmonic analysis
3.4 Graphics
 Isovalues
3.5 Temperatures
 Chart of temperature (radial and axial views)
 Thermal data
 Table of temperatures