AC Induction Motor Vector Control Simulation Tool

AC INDUCTION MOTOR
VECTOR CONTROL SYSTEM
SIMULATION MODEL

A FULLY PARAMETRIC, OPEN ARCHITECTURE DESIGN TOOL
FOR RAPIDLY DEVELOPING VECTOR DRIVE PRODUCTS

FEATURES

Dr. Sidman's comprehensive simulation model integrates motor electrodynamics, mechanical load dynamics
and vector (field-oriented) drive digital control system dynamics.
Parameters are easily modified
Visually intuitive, interconnected, on-screen block diagrams
Internal states of the motor, vector controller, mechanics and electronics are readily observed
Intuitive, instructive GUI block diagrams with scopes
Model is customized and parameterized for your product application
Instruction on model usage

Model typically includes:

Robust, stand-alone state-space 3Ų AC induction motor model with standard parameters
Park and Clark transformations between 3Ų stator and d-q field-oriented coordinates
Feedforward field orientor
Rotor flux estimator
Field weakening
Slip calculator
Flux torque calculator
Voltage decoupler
Peak voltage and current detection
Sample time and A/D quantization effects
Current, flux, voltage, torque and speed controllers
PWM voltage or hysteretic current control
DC link
Inverter voltage saturation
Mechanical load dynamics
Structural flexibility (resonances)
Friction
Electrical and mechanical power measurement
Sensor dynamics

benefits

This is a comprehensive, mature and adaptable simulation model developed by an expert in dynamic systems modeling and motor control systems. It will save the time, frustration and considerable expense of attempting to do it in house from scratch. The model still allows designers the freedom to easily change both the simulation model structure and parameters as they later see fit. Designers are able to develop a product more rapidly, saving significant time in prototyping.

This tool allows product designers to rapidly develop and optimize a complete vector drive product and directly observe the closed-loop performance and interaction of an AC induction motor, an attached mechanism, DC link and the digital vector controller. Although many variable speed AC motor applications require the high performance offered by vector control, the time and cost to develop and optimize a complete simulation model of this kind can be daunting.

This fully parametric, open architecture simulation model and design tool is based on MATLAB and SIMULINK, and allows users to explore a multitude of what-if possibilities, tune performance and debug any problems before or concurrent with prototype development. The user has direct visual access to the internal states of each of the interconnected and simultaneously operating electrical, mechanical and control portions of the system. The designer may also evaluate the effect of worst-case component tolerances, fairly evaluate competing control and sensing schemes, and explore the closed-loop effect of various loads, including mechanical resonances and friction.

Designers can observe the closed-loop performance and simultaneous interaction of AC induction motor electrodynamics, a complex mechanical load and the vector drive digital control dynamics, as well as predict and correct harmful interactions.

The 3Ų AC induction motor simulation model may be run on other controllers or under load without a controller at all.

APPLICATIONS

Elevators, HVAC, Hybrid and Electric Vehicle Propulsion
Engine and Vehicle Dynamometers
Variable Speed AC Motor Drives
Belt Drive Systems
Robotics and Material Handling
Precision AC Servo Systems
Machine Tool and Industrial Control

OUTPUT

Typical display of just several of the many scope views available in this simulation model:

Simulation of an AC induction motor vector control system.

A 40 HP motor is already spinning as the vector control system is turned on.
The torque response is seen to be equally responsive both at high and very low speeds.

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MATLAB and SIMULINK Training is available.