SRM Commutation Logic

Commutation logic for switched reluctance machines

• 

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 θ_on ≤ θ_ph ≤ θ_off.

• 0 if θ_ph < θ_on.

• 0 if θ_ph > θ_off.

where:

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

• β is the torque capability angle.

• θ_on is the switch-on angle.

• θ_off is the switch-off angle.

Examples

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.

• Open Model

Switched Reluctance Machine Speed Control

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. The converter turn-on and turn-off angles are maintained constant.

• Open Model

Ports

Input

theta — Phase angle

scalar

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

Data Types: single | double

thetaON — Switch-on angle

scalar

Lower threshold for turning on the switch.

Data Types: single | double

thetaOFF — Switch-off angle

scalar

Upper threshold for turning off the switch.

Data Types: single | double

Output

abcOnOff — Commutation signal

vector

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

Data Types: single | double

Parameters

Torque capability angle (rad) — Torque angle

pi/2 (default)

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

Sample time (-1 for inherited) — Block sample time

-1 (default) | positive scalar

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.

Extended Capabilities

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

Version History

Introduced in R2018a