Inverse Coordinate Transform (Five-Phase)

Implement dqxy0 to abcde transform

Since R2021a

• 

Libraries:
Simscape / Electrical / Control / Mathematical Transforms

Description

The Inverse Coordinate Transform (Five-Phase) block converts the time-domain direct, quadrature, x, y, and zero components in a rotating reference frame to the components of a five-phase system in an abcde reference frame.

You can configure the block to align the phase a-axis of the five-phase system to either the d-axis or q-axis of the rotating reference frame at time t = 0.

θ = ωt + Offset is the angle between the a and q axes for the q-axis alignment or the angle between the a and d axes for the d-axis alignment, where:

• ω is the rotational speed of the rotational reference frame.

• t is the time, in s, from the initial alignment.

• $$Offset=\begin{array}{c}\text{}\frac{\pi }{2},d-axisalignment\\ 0,q-axisalignment\end{array}$$

Equations

The Inverse Coordinate Transform (Five-Phase) block implements the transform as

$$\left[\begin{array}{c}a\\ b\\ c\\ d\\ e\end{array}\right]=\left[\begin{array}{ccccc}\sin \theta & \cos \theta & \sin \theta & \cos \theta & \frac{1}{\sqrt{2}}\\ \sin \left(\theta -\frac{2\pi }{5}\right)& \cos \left(\theta -\frac{2\pi }{5}\right)& \sin \left(\theta +\frac{4\pi }{5}\right)& \cos \left(\theta +\frac{4\pi }{5}\right)& \frac{1}{\sqrt{2}}\\ \sin \left(\theta -\frac{4\pi }{5}\right)& \cos \left(\theta -\frac{4\pi }{5}\right)& \sin \left(\theta -\frac{2\pi }{5}\right)& \cos \left(\theta -\frac{2\pi }{5}\right)& \frac{1}{\sqrt{2}}\\ \sin \left(\theta +\frac{4\pi }{5}\right)& \cos \left(\theta +\frac{4\pi }{5}\right)& \sin \left(\theta +\frac{2\pi }{5}\right)& \cos \left(\theta +\frac{2\pi }{5}\right)& \frac{1}{\sqrt{2}}\\ \sin \left(\theta +\frac{2\pi }{5}\right)& \cos \left(\theta +\frac{2\pi }{5}\right)& \sin \left(\theta -\frac{4\pi }{5}\right)& \cos \left(\theta -\frac{4\pi }{5}\right)& \frac{1}{\sqrt{2}}\end{array}\right]\left[\begin{array}{c}d\\ q\\ x\\ y\\ 0\end{array}\right]$$

Ports

Input

dqxy0 — Direct, quadrature, x, y, and zero components

vector

Direct, quadrature, x-axis, y-axis, and zero components of the system in the rotating reference frame, specified as a vector.

Data Types: single | double

θ_elec — Rotational angle

scalar

Angular position of the rotating reference frame, specified as a scalar.

Data Types: single | double

Output

abcde — a-, b-, c-, d-, and e-phase components

vector

Components of the five-phase system in the abcde reference frame, returned as a vector.

Data Types: single | double

Parameters

Phase-a axis alignment — dqxy0 reference frame alignment

Q-axis (default) | D-axis

Whether to align the a-phase vector of the abcde reference frame to the d-axis or q-axis of the rotating reference frame.

Extended Capabilities

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

Version History

Introduced in R2021a