emachinery 1.1.4

A package for electric machinery analysis.

emachinery

A package for analysis of electric machinery.

A. Functions

1. Machine Quantities Calculations & Conversion

2. PI Regulator Tuner based on Texas Instruments' InstaSPIN

3. Run C-based Numerical Integration Simulation

4. Sweep Frequency Analysis

5. FEA based Machine Design and Multi-Objective Optimization (develop)

6. PC User GUI for Serial Communication to DSP (develop)

B. Installation and Requirements

The package can be installed via pip.

pip install emachinery

The package requires the following free softwares to work as expected:

• gmake.exe (I use the one from TI's CCS, it is located at somewhere like D:\ti\ccs930\ccs\utils\bin\gmake.exe)
• gcc (comes with MinGW---note I have both CCS and MinGW installed on my PC---might not be needed)
• pip install
  • control
  • qtconsole
  • PyQt5
  • pylab (that comes with Anaconda3, including numpy, matplotlib, etc.)
• [Optional, to view .ui file] Qt Designer

C. Simulation Tips

1. Field oriented control is an asymptotic input-output linearizing (IOL) control. This means the IOL is achieved only when flux modulus is regulated to its reference. So before motor starts, we must wait for the motor to build up its magnetic air gap field or else the starting transient would be disturbed. Refer to the figure below.
2. The inductance of the motor matters. For a small "DC" servo PM motor, the inductance is relatively designed to be low because the DC source is usually only 24 V or 48 V. However, an induction motor usually has higher inductance, which limits the bandwidth of the current loop, I think. For example, this is what happens to d-axis current regulation when I set desired velocity loop bandwidth from 50 Hz up to 100 Hz. Refer to the figure below.

Known Issues

Anaconda3 Python Version

Anaconda3 (Python 3.8) comes with qtconsole now, but it will cause problems. My code was developed with Anaconda3 (Python 3.7). So one silly fix is to revert back to Python 3.7 for now: conda install python=3.7 anaconda=custom

Jupyterlab/Qtconsole Version

After I upgrade my jupyterlab to version 3, qtconsole (version 4.6.0) starts to not work well. Below is some error message.

Traceback (most recent call last):
  File "D:\DrH\Codes\emachineryTestPYPI\emachinery\gui\main.py", line 947, in <module>
    main()
  ...
  ...
  ...
  File "D:\DrH\Codes\emachineryTestPYPI\emachinery\gui\consolewidget.py", line 31, in __init__
    self.kernel_client = kernel_client = self._kernel_manager.client()
  File "D:\Users\horyc\Anaconda3\lib\site-packages\qtconsole\base_frontend_mixin.py", line 63, in kernel_client
    if kernel_client.channels_running:
  File "D:\Users\horyc\Anaconda3\lib\site-packages\jupyter_client\client.py", line 141, in channels_running
    self.control_channel.is_alive())
  File "D:\Users\horyc\Anaconda3\lib\site-packages\jupyter_client\client.py", line 200, in control_channel
    socket, self.session, self.ioloop
TypeError: ChannelABC() takes no arguments

I found a related discussion here: https://github.com/jupyter/jupyter_client/issues/523 Reading the webpage, I fix this problem by first uninstalling ipykernel and install it back to a higher version.

pip uninstall ipykernel
Found existing installation: ipykernel 5.1.4
Uninstalling ipykernel-5.1.4:

pip install ipykernel
Collecting ipykernel
  Downloading ipykernel-5.4.2-py3-none-any.whl (119 kB)

Other Information

This package is published to PYPI following https://www.youtube.com/watch?v=Qs91v2Tofys

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Changelog

1.1.4

• Anaconda3 (Python 3.8) comes with qtconsole now, but it will cause problems. My code was developed with Anaconda3 (Python 3.7). So one silly fix is to revert back to Python 3.7 for now: conda install python=3.7 anaconda=custom

1.1.3

• No use of LoadUi when published

1.1.2

• Support parametric analysis.

1.1.1

• User is now able to select from different plot settings.
• Support sinusoidal flux modulus command for induction motor.
• Remember user's last selected plot setting considering machine types, i.e., IM or PMSM.
• Marino05 is tuned.

1.1.0

• Induction motor simulation.
• Marino05 is added.
• Harnefors06 is tuned for a different motor.
• Fix the bug "cannot file .dat file" when "Plot Here" is clicked upon start.

1.0.9

• (Video@Bilibili) Demonstrate the effectiveness of the current loop decoupling (PMSM).
• Allow velocity-open-loop and current-closed-loop for sweep frequency analysis.
• Automatically add path2acmsimc if the user-specified path does not exist.
• Remember last user input for C-based simulation.

1.0.8

• I was stupid. Version 1.0.7 did not do its job.

1.0.7

• Add the resource "makefile" to the package.

1.0.6

• Remember last user input for path2acmsimcv5 and add config.json to gui/
• Publish acmsimcv5 along with the package.

1.0.5

• Add sweep-frequency and bode-plot feature.
• gmake compile .c program, execute .exe, collect .dat, and ggplot.