How Do Power Electronics Work?
A power electronic system consists of an electrical energy source, a power electronic converter circuit, an electrical load, a sensor and control circuit. The converter and controller are two major components in working.
The power converters change one form of electric power into another with the use of a power semiconductor device. While power controllers are the ones that are responsible for producing control signals relative to turning on or off the switching devices present within the circuit, this is divided into a variety of applications:
- Power Generation
- Power Transmission
- Power Control
- Power Distribution
The complete operation of the system will provide the desired signal at a particular frequency, as shown in the block diagram given below, and it will include several steps:
Step 1
In power electronic systems, there can be an AC or DC source of electric power. The DC electric power source can be a DC generator, battery, etc., while the AC electric power source can be an alternator or induction generator. With the use of a controller, a signal of controlled power reaches the load end from the source via a converter.
Step 2
Next, the converter provides ac or dc electric power according to the load with variable voltage and frequency. The electric power at the output is dependent on the load. When the load is DC motor, the converter provides the output as an adjustable DC voltage.
Step 3
The parameters on which the load is measured, like voltage, current, etc., act as the input signal for the controller unit. These are known as feedback signals or controller input signals. Along with the feedback signal, the controller is also provided with the reference input signal.
The control signal generated by the controller is an outcome of the comparison made between the feedback signal and the reference input signal. This control signal regulates the turning on and off of the switching devices of the power converter.
Final Output
In this way, with proper control, the desired output is achieved at the load.
Working of Power Electronics
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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