Variable-speed current-driven no-load sinusoidal vibro-acoustic simulation with permeance / mmf model

A new project is set-up in tuto_test_SCIM_14 by copy/paste tuto_test_SCIM_01 (or by loading it with the GUI) in order to simulate the variable speed vibroacoustic behaviour when specifying a phase current Vs speed curve. The variable speed operation is activated by specifying:

Input.Simu.type_varspeed = 2;

The speed range and number of speeds are defined as

Input.Simu.N0_min=500;              % min rotation speed  [rpm]
Input.Simu.N0_max=5000;             % max rotation speed [rpm]
Input.Simu.Nspeeds=10;              % number of different rotating speeds

The following parameters are modified in order to impose a specific current Vs speed curve at variable speed:

Input.Simu.type_control = 5;

Note that the input parameter Input.Simu.type_extsupply should be left to 0 as it only deals with the single speed simulation control.

The current versus rotating speed is specified with:

Input.Simu.N0spec = [0,500,1000,1500,2000,2500,3000,3500,4000,4500,5000,5500,6000];        % rotation speed [rpm]
Input.Simu.I0spec = [100,100,100,100,100,100,70,55,35,20,10,10,10];                 % phase current [A]

One can notice that the phase current is constant at starting, and decreases above 2500 rpm which is actually the field weakening frequency specified in the simulation input as :

Input.Simu.freq_mains = 125;

With the GUI, all these parameters are gathered in the Workflow/Variable Speed:

140. Variable speed simulation setup with the GUI
Variable speed simulation setup with the GUI

You need to select "variable speed simulation" to enter the control law. The corresponding one is "Current and slip Vs speed curve". As we are at no-load, you can leave the "slip frequency" at 0. To enter your values, you need to click on "Add row" 13 times to get the correct table size and then enter your values. You can then check your input with the button "Preview".

Result interpretation

The text output of MANATEE should contain lines such as :

MANATEE Simulation text output
MANATEE Simulation text output

The evolution of current and noise at variable speed can be plotted with

>> run_MANATEE('tuto_test_SCIM_14')
>> plot_VS_var('I10rms')
>> plot_VS_var('LwrA')

One can see that the phase current correctly follows the specified values. The noise level is reduced at higher speed due to lower flux level.

Evolution of I10rms
Evolution of I10rms
Evolution of the A-weighted sound power level
Evolution of the A-weighted sound power level
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