Documentation

ASM Scalar Control

Asynchronous machine V/f control

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  • Simscape / Power Systems / Simscape Components / Control / ASM Control

Description

The ASM Scalar Control block implements an asynchronous machine (ASM) scalar, that is V/f or V/Hz, control structure. The diagram shows the open-loop V/f control structure that the block implements.

Equations

The ASM Scalar Control block computes the magnitude of the stator voltage based on the reference frequency, fs*, as:

Vs*=(VnVminfnfmin)fs*,

where:

  • Vn is the rated voltage.

  • Vmin is the minimum voltage.

  • fn is the rated electrical frequency.

  • fmin is the minimum frequency.

The voltage components in the stationary reference frame are:

Vα=Vs*cos(2πfs*t)

and

Vβ=Vs*sin(2πfs*t).

The block obtains Vabc from Vα and Vβ by using an inverse Clarke transformation.

Ports

Input

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Reference electrical frequency.

Example: Example

Data Types: single | double

Output

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Reference phase voltages.

Example: Example

Data Types: single | double

Parameters

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Nominal frequency.

Nominal voltage.

Lower bound for the voltage.

Time interval between samples. If the block is inside a triggered subsystem, inherit the sample time by setting this parameter to -1. If this block is in a continuous variable-step model, specify the sample time explicitly. For more information, see What Is Sample Time? (Simulink) and Specify Sample Time (Simulink).

Introduced in R2017b

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