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Squirrel-cage Induction Motor - Panels
Understanding the Panel
When starting the demo, the panel in figure 7 appears first with the default settings.
Figure 7: Start-Up Panel of the Induction Motor Drive Laboratory
The panel is to be operated as follows:
In the upper left corner, under DC Machine (DCM), the student can set the field voltage of the DC machine and can change the value of the resistive load.
In the middle left corner, under Command, the student can select the type of control to be applied to the induction motor.
Under each command tab, there are control parameters and/or control buttons that are summarized in tables 4 and 5.
Once a control is selected and applied, the student can observe the related waveforms under Oscilloscopes.
More details about the displayed waveforms are discussed later.
Table 4 summarizes the control parameters, while table 5 is dedicated for the control buttons.
Control Parameters | Tab | Default Value | Interval of Variation |
|---|---|---|---|
DCM Field Voltage (V) | DC Machine (DCM) | 0 | [0; 460] |
DCM Variable Load (Ω) | DC Machine (DCM) | 0 | [0; 20] |
Inverter frequency (Hz) | Command V/F | 0 | [0; 60] |
Reference torque (Nm) | Torque Control | 0 | [-55; 55] |
Reference speed (rpm) | Speed Control | 0 | [-2500; 2500] |
Table 4: Control Parameters of the IM Drive
Control Buttons | Associated functions | ||
|---|---|---|---|
TRIGGER |  | The waveforms are not triggered. They “move” | |
| The waveforms are triggered with respect to a reference signal. | ||
This button is accessible only for the V/F Control Oscilloscopes. | |||
V/F control | | V/F control is disabled. | |
| V/F control is enabled. | ||
This button is accessible in V/F Command only. | |||
Reset | | The reset push button is disabled. | |
| The reset push button is activated and simulates replacement of fuses after a fault. | ||
This button is accessible and enabled in all scenarios | |||
ACTIVATE |
| Flux control is disabled. | |
| Flux control is enabled. | ||
This button is accessible in Flux Control only. | |||
enable |
| Torque control is disabled. | |
| Torque control is enabled. | ||
This button is accessible in Torque Control only. | |||
ENABLE |
| Speed control is disabled. | |
| Speed control is enabled. | ||
This button is accessible in Speed Control only. | |||
Fia | | The DC machine’s armature fuse is blown. | |
| The DC machine’s armature fuse is intact. | ||
Fif | | The DC machine’s field fuse is blown. | |
| The DC machine’s field fuse is intact. | ||
Fi1 | | The induction machine’s stator phase 1 fuse is blown. | |
| The induction machine’s stator phase 1 is intact. | ||
Fi2 | | The induction machine’s stator phase 2 fuse is blown. | |
| The induction machine’s stator phase 2 is intact. | ||
Fi3 | | The induction machine’s stator phase 3 fuse is blown. | |
| The induction machine’s stator phase 2 is intact. | ||
Control Choice | | Allow to implement the flux, torque, and speed controllers manually (User) or automatically (Predefined). | |