Pulse Width Modulation (PWM)
Pulse Width Modulation (PWM)
The PWM is a widely used technique to control the average power delivered to load by the varying the duty cycle of the fixed-frequency pulse signal. It is commonly employed in the applications like motor control voltage regulation and inverters.
Working Principle of PWM
- Pulse Generation: The PWM generates a series of the pulses with fixed frequency. The duration of the each pulse known as the pulse width is variable.
- Control Signal: The width of the pulses is controlled by the reference signal often called the modulation or control signal.
- Duty Cycle: The duty cycle is the ratio of the pulse width to total time period of the one cycle. It is usually expressed as a percentage.
Duty Cycle (%) = (Pulse Width Total Time Period) × 100 Duty Cycle (%)=( Total Time Period Pulse Width )×100
- Average Voltage Control: By varying the duty cycle the average voltage applied to load can be controlled. A higher duty cycle results in the higher average voltage and vice versa.
What are the Control Methods in Power Electronics ?
In this composition we will learn about Control styles in power electronics, The Control styles in power electronics are abecedarian ways used to manage and regulate the inflow of electrical energy in electronic systems. These styles play a pivotal part in ensuring effective and dependable operation of the power electronic bias.
Table of Content
- What is Control Methods in Power Electronics?
- Key Terminologies
- Control Methods in Power Electronics
- Pulse Width Modulation (PWM)
- Feedback Control
- Hysteresis Control
- Time Ratio Control