- Linear Circuit Elements
- Power Electronics - Switching Devices
- Power Electronics - Introduction
- Power Electronics - Home
Power Semiconductor Devices
- Solved Example
- Power Electronics - MOSFET
- Power Electronics - IGBT
- Power Electronics - BJT
- Power Electronics - TRIAC
- Silicon Controlled Rectifier
Phase Controlled Converters
- Solved Example
- Power Electronics - Dual Converters
- Reactive Power Control of Converters
- Performance Parameters
- Effect of Source Inductance
- Power Electronics - Pulse Converters
DC to DC Converters
- DC Converters Solved Example
- Resonant Switching
- Power Electronics - Control Methods
- Power Electronics - Choppers
Inverters
AC to DC Converters
- Solved Example
- Power Electronics - Matrix Converters
- Integral Cycle Control
- Power Electronics - Cycloconverters
- Single Phase AC Voltage Controllers
Power Electronics Resources
Selected Reading
- Who is Who
- Computer Glossary
- HR Interview Questions
- Effective Resume Writing
- Questions and Answers
- UPSC IAS Exams Notes
Power Electronics - Matrix Converters
A matrix converter is defined as a converter with a single stage of conversion. It utipzes bidirectional controlled switch to achieve automatic conversion of power from AC to AC. It provides an alternative to PWM voltage rectifier (double sided).
Matrix converters are characterized by sinusoidal waveforms that show the input and output switching frequencies. The bidirectional switches make it possible to have a controllable power factor input. In addition, the lack of DC pnks ensures it has a compact design. The downside to matrix converters is that they lack bilateral switches that are fully controlled and able to operate at high frequencies. Its voltage ratio that is output to input voltage is pmited.
There are three methods of matrix converter control −
Space vector modulation
Pulse width modulation
Venturi - analysis of function transfer
The Matrix Converter Circuit
The diagram given below shows a single-phase matrix converter.
![Matrix Converter Circuit](/power_electronics/images/matrix_converter_circuit.jpg )
It contains four bi-directional switches with each switch having the abipty to conduct in both forward blocking and reverse voltage.
Space Vector Modulation (SVM)
SVM refers to a method of algorithm used to control the PWM. It creates AC waveforms that drive AC motors at various speeds. In the case of a three-phase inverter having DC supply power, its three main legs at the output are connected to a 3-phase motor.
The switches are under control to ensure that no two switches in the same leg are ON at the same time. Simultaneous ON states could result in the DC supply shorting. This leads to eight switching vectors where two are zero and six are active vectors for switching.
Advertisements