Identified in a New York Times article in 2019 as the esoteric bible that has gone mainstream, A Course in Miracles (ACIM) has become the de facto bible of a growing group of people who consider themselves “spiritual but not religious” (SBNR). But despite its heady mix of reinterpreted Christian language and modern psychological ideas, ACIM is a radical departure from any spiritual teaching we have ever seen before.
The PC GUI application allows you to update the ACIM firmware project and configure the dedicated induction motor parameters settings. The GUI also enables you to monitor waveforms and variables at runtime using X2CScope. The GUI is based on the example project generated by ST MC Workbench and configured for MAIN_LSO_FOC mode.
The application is powered by the SAMC21J18A MCU and uses the VHz control algorithm to regulate the speed of the Acim motor. The application generates the three phase sinusoidal voltages based on the speed command and controls the start/stop operation of the motor.
Among other things, the application includes a dedicated current limiter block that limits the maximum DC current. The current limiter blocks are enabled by enabling the corresponding checkbox in the GUI. In addition to the current limiter, the application supports a range of other features that allow for fast and easy development of ACIM applications for the STM32 microcontroller family.
Some of the most important features are the ACIM Reference block, which computes the d- and q-axis reference currents for field-oriented control (and field weakening). It accepts the reference torque and feedback mechanical speed, converts them to SI units, solves the resulting equations, and then outputs the reference current values.
The other significant ACIM block is the Motor Current Reference, which calculates the nominal phase currents based on the speed command and the motor characteristics. This is accomplished by solving a set of equations that take into account the stator electromagnetic pole pairs, the rotor phase leakage inductance (Llr) and the rated no-load phase current (Im).
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