**System Modeling With Transfer Functions**

What is a transfer function? Three examples included.

Tags: Control Theory

**Transfer Function Stability - Interesting Facts About Polynomial Form**

Quickly determine system stability from the sign of the polynomial coefficients. Numerical analysis not required.

Tags: Control Theory

A quick refresher on system block diagrams and associated signals.

Tags: Control Theory

**Voltage to Current Opamp Converter**

Voltage to current transducer circuitry for system instrumentation.

Tags: Instrumentation

**Current Mode Control- Where is the Second Pole?**

The second pole, typically associated with PI controller, seems to disappear in current mode

Tags: Power Electronics

**Lead / Lag Compensators**** >> Simulator <<**

Introduction to Lead and Lag compensators. Bode plot characteristics and interactive example in the web-based simulator

Tags: Control Theory, Interactive Demo

**Proportional-Integral (PI) Controller : Theory + Demo**** >> Simulator <<**

Explore the interactive demo of a PI compensator controlling a motor winding current in both time and frequency domains.

Tags: Control Theory, Interactive Demo

**A Quick Look on Three-phase Overmodulation Waveforms**

What shape do output voltage waveforms have in non-linear overmodulation region?

Tags: Motor Control

**System Dynamics - Time Constants**

Three easy ways to estimate system time constants.

Tags: Control Theory

**Proportional Controller Implementation**

This article focuses on the high-level implementation of the proportional controller with opamps, DSPs, FPGAs, and in Simulink.

Tags: Control Theory

**Are FPGAs the Future for the Control of Power Electronics and Motor Drives?**

Do you prefer DSPs or FPGAs? Fortunately, there seems to be great future for both.

Tags: Miscellaneous

**Textbooks and Journals for Power Electronics and Motor Controls**

A list of fundamental resources for general and applied control theory.

Tags: Miscellaneous

**Proportional Controller: Theory and Demo**** >> Simulator <<**

The simplest linear controller explained. Explore the dynamics and steady-state behavior in the web-based simulator.

Tags: Control Theory, Interactive Demo

**Bode Plot - Interactive Pole/Zero Placement**** >> Interactive <<**

Bode plots of low/high-pass filters, PI controller, lead/lag filters and build-your-own. Overlay multiple Bode Plots.

Tags: Control Theory, Interactive Demo

**Interactive Website Scope : Documentation **

Learn how to use the scope feature used throughout this website.

Tags: Instrumentation, Miscellaneous

Digital control systems are the norm today. Learn a bit about the path from the analog domain to the discrete-time domain.

Tags: Control Theory

What is the effect of feedback-path filtering on controller design?

Tags: Control Theory

How can one approximate Infinite-Impulse Response systems with Finite-Impulse Response systems?

Tags: Control Theory

Natural frequency, damping factor, oscillations, pole locations, time-domain waveforms.

Tags: Control Theory, Interactive Demo

**Low-Pass Filter Discretization**** >>> Interactive Example <<<**

Explore the discretization of the most common IIR filter.

Tags: Control Theory, Interactive Demo

**S/Z Plane Relationship **** >>> Interactive Example <<<**

See the effect of pole location in continuous and discrete time domains at the same time.

Tags: Control Theory, Interactive Demo

**Fourier Series Demo **** >>> Interactive Example <<<**

See the relationship between frequency-domain coefficients and time-domain waveform.

Tags: Control Theory, Interactive Demo

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