SRM Commutation Logic

R2026b

Commutation logic for switched reluctance machines

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  • SRM Commutation Logic block

Libraries:
Simscape / Electrical / Control / SRM Control

Description

The SRM Commutation Logic block provides a logic signal for the Switched Reluctance Machine (SRM) block. The signal indicates when to switch the supply for each phase on and off.

The commutation signal for each phase is:

  • 1 if θon ≤ θph ≤ θoff.

  • 0 if θph < θon.

  • 0 if θph > θoff.

where:

  • θph is the phase angle in the interval [0,β ].

  • β is the torque capability angle.

  • θon is the switch-on angle.

  • θoff is the switch-off angle.

Examples

Switched Reluctance Machine Current Control

Switched Reluctance Machine Current Control

Control the current amplitude in a switched reluctance machine (SRM) based electrical drive. A DC voltage source feeds the SRM through a controlled three-arm bridge. An ideal angular velocity source provides the load. The converter turn-on and turn-off angles are maintained constant. A PI-based current controller regulates the current amplitude.

Control Rotor Speed of Switched Reluctance Machine

Control Rotor Speed of Switched Reluctance Machine

Control the rotor speed in a switched reluctance machine (SRM) based electrical drive. A DC voltage source feeds the SRM through a controlled three-arm bridge. To achieve both forward and backward rotation, this example adjusts the converter turn-on and turn-off angles using the speed error.

Ports

Input

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Phase angle, θph, in the interval [0, β ].

Data Types: single | double

Lower threshold for turning on the switch.

Data Types: single | double

Upper threshold for turning off the switch.

Data Types: single | double

Output

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Commutation signal for each phase: 1 for the switch-on condition and 0 for switch-off condition

Data Types: single | double

Parameters

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The torque production capability of one rotor pole, in radians.

Time, in s, between consecutive block executions. During execution, the block produces outputs and, if appropriate, updates its internal state. For more information, see What Is Sample Time? and Specify Sample Time.

If this 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 using a positive scalar.

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"ee_sl_lib/SRM Control/SRM Commutation Logic"

Example: add_block("ee_sl_lib/SRM Control/SRM Commutation Logic","myModel/myBlock",MakeNameUnique="on")

Extended Capabilities

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C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2018a

See Also

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