Modeling and Simulationof

The Induction motorfeed by

Matrix converter

ac to ac converter

1. Direct converter(No use dc link)

2. Indirect converter(Utilize dc link Between two ac systems)

Matrix converters are Direct converter.

Matrix Converter

3 Phase matrix converter consists 9 bi-directional switches.

Suppression of power harmonics.

It provides input and output sinusoidal waveforms.

It is capable of regenerating energy back to the main supply.

There is no reactive component for storage purpose.

Four quadrant operation.

Longer operating life.

Modulation Techniques of Matrix Converter

Alesina –Venturini modulation technique

or

Optimum Venturini amplitude Modulation (OVAM)

Scalar modulation technique.

Space vector modulation technique.

(Used for producing the gating signals)

indirect modulation technique.

Use for change the voltage Transfer ratio.

Optimum Venturini amplitude Modulation (OVAM) Technique

This method provides the amplitude of output voltage up

to 86.6% of input voltage.

Also provides unity fundamental displacement factor at the

input regardless of the load displacement factor.

Induction Motor

The squirrel cage type of induction motor is very popular in case of

variable-speed drives.

Available in all power ratings.

Also used for Constant speed applications.

Needs no extra starting motor and need not be synchronized.

Low cost and minimum maintenance.

High reliability and sufficiently high efficiency.

Modeling and Simulation

Modeling of matrix converter

Modeling of Subsystem block

Resultant Waveforms

Input Current of matric converter

Output Current of matric converter

Input Voltage of matric converter

Output Voltage of matric converter

Rotor speed of induction motor

Stator Current of induction motor

Electromagnetic torque of Induction motor

Conclusions

Odd/low order harmonics do not contribute the output power of the

motor, they produce additional losses in the machine. These are

suppressed by Matrix converter.

Harmonic losses reduces the efficiency and cause derating of the motor

and increases torque pulsating.

Regeneration ability and four quadrant Operation meets the stringent

energy efficiency and power quality.

Increase input Power factor.