Induction Motor-IRTF

Category: Toolbox > eDrives > Motors

Inputs:

• U_s: Input voltage vector for motor in alpha-beta convention.

• T_l: Load torque.

• Rotor_lock: Clamp enable for motor shaft. When input is set to 1, the shaft speed is forced to zero. (binary input)

Outputs:

• psi_R: Rotor Flux vectors in d-q axes coordinates.

• i_s: Output current vector for stator currents in alpha-beta coordinates.

• T_me: Mechanical shaft torque of the motor.

• w_me: Mechanical shaft speed of the rotor.

Description: The Induction Motor-IRTF block is a motor model for a three phase AC Induction machine. This is a mathematical model of an electrical machine based on Ideal Rotating Transformer model. A four parameter model representation, as shown below, is used.

Graphical user interface, application

Description automatically generated

Leakage Inductance (H): Indicates the combined (stator/rotor) stator referred leakage inductance.

Magnetizing Inductance (H): Indicates the stator referred magnetizing inductance $%FontSize=10 %TeXFontSize=10 \documentclass{article} \usepackage{amsmath} \pagestyle{empty} \begin{document} $ L_M $ \end{document}$ .

Number of Pole Pairs: Indicates the number of motor pole pairs.

Rotational Inertia: Indicates the inertia of the rotor (plus mechanical load if attached).

Rotor Resistance (ohms): Indicates the stator referred rotor resistance $%FontSize=10 %TeXFontSize=10 \documentclass{article} \usepackage{amsmath} \pagestyle{empty} \begin{document} $ R_R $ \end{document}$ .

Stator Resistance (ohms): Indicates the stator winding resistance $%FontSize=10 %TeXFontSize=10 \documentclass{article} \usepackage{amsmath} \pagestyle{empty} \begin{document} $ R_s $ \end{document}$ .

Slip (shown in the equivalent model above): Defined as $%FontSize=10 %TeXFontSize=10 \documentclass{article} \usepackage{amsmath} \pagestyle{empty} \begin{document} $ s=\frac{n_{syn}-n_{me}}{n_{syn}} $ \end{document}$ where $%FontSize=10 %TeXFontSize=10 \documentclass{article} \usepackage{amsmath} \pagestyle{empty} \begin{document} $ n_{syn}, n_{me} $ \end{document}$ represent the synchronous and mechanical shaft speed, respectively.