25-08-2017, 09:32 PM
Power Electronics Devices
[attachment=34403]
Introduction to Power Electronic Devices
1) The concept and features
2) Configuration of systems using power electronic devices
3) Classifications
The concept and features
Concept:
Power electronic devices are the electronic devices that can be directly used in the power processing circuits to convert or control electric power.
In broad sense ,
1) Vacuum devices : Mercury arc rectifier、 thyratron etc.
2) Semiconductor devices: Major material ——Silicon
Very often ,
Power electronic devices = Power semiconductor devices
Features:
The electronic power that power electronic device deals
with is usually much larger than that the information
electronic device does.
Usually working in switching states to reduce power losses.
Need to be controlled by information electronic circuits.
Dissipated power loss usually larger than information
electronic devices ——special packaging and heat sink
are necessary.
History and applications of power diode
Applied in industries starting 1950s
Still in- use today. Usually working with controlled devices as necessary components
In many circumstances fast recovery diodes or schottky diodes have to be used instead of general purpose diodes.
Thyristors
Another name: SCR——silicon controlled rectifier
Thyristor opened the power electronics era
-1956, invention, Bell Laboratories
- 1957, development of the 1st product, GE
- 1958, 1st commercialized product, GE
- Thyristor replaced vacuum devices in almost every power
processing area.
Still in use in high power situation. Thyristor till has the
highest power- handling capability.
[attachment=34403]
Introduction to Power Electronic Devices
1) The concept and features
2) Configuration of systems using power electronic devices
3) Classifications
The concept and features
Concept:
Power electronic devices are the electronic devices that can be directly used in the power processing circuits to convert or control electric power.
In broad sense ,
1) Vacuum devices : Mercury arc rectifier、 thyratron etc.
2) Semiconductor devices: Major material ——Silicon
Very often ,
Power electronic devices = Power semiconductor devices
Features:
The electronic power that power electronic device deals
with is usually much larger than that the information
electronic device does.
Usually working in switching states to reduce power losses.
Need to be controlled by information electronic circuits.
Dissipated power loss usually larger than information
electronic devices ——special packaging and heat sink
are necessary.
History and applications of power diode
Applied in industries starting 1950s
Still in- use today. Usually working with controlled devices as necessary components
In many circumstances fast recovery diodes or schottky diodes have to be used instead of general purpose diodes.
Thyristors
Another name: SCR——silicon controlled rectifier
Thyristor opened the power electronics era
-1956, invention, Bell Laboratories
- 1957, development of the 1st product, GE
- 1958, 1st commercialized product, GE
- Thyristor replaced vacuum devices in almost every power
processing area.
Still in use in high power situation. Thyristor till has the
highest power- handling capability.