Bright Rectifier(electronic devices and circuits) .pptx

This is a ppt on bridge rectifier

1. Bridge Rectifier

2. INTRODUCTION A  rectifier  is an electrical device that  converts   alternating current  (AC), which periodically reverses direction, to  direct current  (DC), which flows in only one direction. The process is known as  rectification , since it "straightens" the direction of current. A rectifier is an electrical device that converts alternating current(AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The process is known as rectification

3. Half-wave rectification Full-wave rectification Full-wave rectifier using a  center tap  transformer and 2 diodes. Rectifier circuits

4. BRIDGE RECTIFIER with filter (A full-wave rectifier using four diodes)

5. A rectifier diode ( silicon controlled rectifier ) and associated mounting hardware. The heavy threaded stud attaches the device to a  heatsink  to dissipate heat.

6. SIMULATION MODEL : *This shows a AC transformer plus full-wave bridge rectifier. It converts 230 volts AC to 220 volts DC.   *The full-wave bridge rectifier plus capacitor combination then converts this to DC.

7. Filters The devices which converts the pulsating DC in to pure DC is called filter. As the name specifies it filters the oscillations in the signal and provides a pure DC at the output. The electronic reactive elements like capacitor and inductors are used to do this work. Filters for Rectifier Circuits

8. Capacitor filter The pulsating Direct Current (DC) produced by the full wave rectifier contains both AC and DC components. We know that the capacitor allows the AC components and blocks the DC components of the current. When the DC current that contains both DC components and AC components reaches the filter, The DC components experience a high resistance from the capacitor whereas the AC components experience a low resistance from the capacitor.

9. Electric current always prefers to flow through a low resistance path.  So the AC components will flow through the capacitor whereas the DC components are blocked by the capacitor.  Therefore, they find an alternate path and reach the output load resistor R L .  The flow of AC components through the capacitor is nothing but the charging of a capacitor.    Thus, the filter converts the pulsating DC into pure DC

10. The output of the rectifier pulsating in nature, it consists of a desired DC component of voltage and unwanted ripple components. These ripple components are removed by placing filter circuit at the output of the rectifier.

11. The pulsating Direct Current (DC) produced by the full wave rectifier contains both AC and DC components. We know that the capacitor allows the AC components and blocks the DC components of the current. When the DC current that contains both DC components and AC components reaches the filter, the DC components experience a high resistance from the capacitor whereas the AC components experience a low resistance from the capacitor. Electric current always prefers to flow through a low resistance path. So the AC components will flow through the capacitor whereas the DC components are blocked by the capacitor. Therefore, they find an alternate path and reach the output load resistor R L . The flow of AC components through the capacitor is nothing but the charging of a capacitor. Thus, the filter converts the pulsating DC into pure DC

12. THANK YOU