Block Representation of Power Electronics
The main blocks of a power electronics system are:
- Source of Electrical Power
- Power electronic converter circuit
- Electrical Load
- Sensor, Sensing Unit, or Feedback Circuit
- Control Unit or Controller
Block Diagram of Power Electronics
Source of Electrical Power
Mainly, there are two types of electrical energy sources. They are
- AC
- DC
Power electronic converter circuit
- Power electronic converter circuits convert the input power from the source to a suitable form as required by the load.
- For example, it we have a DC source and need to supply an induction motor, then it is necessary to convert DC to AC, which is achieved using power electronic converter circuits.
- It works as a converter.
- During transient operation, it retrieves the source and motor current in cases of excessive current (overload).
Electrical Load
- The load can be a motor, battery, etc. Usually, loads are specified by their power rating and the type of source required. The ratings of the load largely determine the ratings of the power electronic converter circuit.
Sensor, Sensing Unit, or Feedback Circuit
- The sensing and feedback circuits monitor the load conditions. For example, speed and output current are sensed in the case of motor loads.
- The sensing unit helps in sensing certain drive parameters, like current or voltage, may be required for protection or for closed loop operation.
Control Unit or Controller
- The control unit consists of the drive circuits of the power electronic converter circuit.
- The drives of the switches are adjusted according to feedback and reference values.
- It consists of control circuits that are operated as power modulators as desired.
Power Electronics
Power electronics is the technology for efficient conversion, control, and management of electric power and to control the flow of electrical energy. Power electronics are used in everything from laptop chargers to inverters driving electric vehicles and renewable energy systems.
Power electronics manage the flow of electricity, maximizing performance and minimizing waste. Power Electronics runs the devices efficiently with the control and conversion of electric power.
Table of Content
- Power Electronics
- Block Representation
- Working
- Types
- Power Semiconductor Devices
- Applications
- Benefits
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