Topic : Full Wave Bridge Rectifier (Simulation Model) Filter /Without Filter

Submitted to: Ravindra Meena Sir ( HOD Electrical dept.)

Submitted by : Jaspreet Singh Ruchit Porwal Adhiraj Singh

Electrical Major

Assignment

Table Of Contents

Need of Rectifiers

•Rectifier is used to convert AC signal to DC signal

•Almost all the electronic devices such as diodes, transistors, ICs, etc. Require DC voltage for their proper operation

•It can be used as a substitute for source of DC voltage

•It is used in high current power supplies

•It is used in power supplies for many electronc circuits

Components Used

AC voltage source: 230V, 50Hz

Diodes: 4 - IN4007

Resistor: 10k ohms

Oscilloscope

Capacitor: 500 micro farads

Sinusoidal Voltage Source

The sine wave or sinusoid is a mathematical curve that describes a smooth repetitive oscillation. It is named after the function sine, of which it is the graph. It occurs often in pure and applied mathematics, as well as physics,engineering, signal processing and many other fields.

Diodes

In electronics, a diode is a two-terminal electronic component that conducts primarily in one direction , it has low (ideally zero)resistance to the flow of current in one direction, and high (ideally infinite) resistance in the other.

Resistors

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. Resistors may be used to reduce current flow, and, at the same time, may act to lower voltage levels within circuits

Oscilloscope

An oscilloscope, previously called an oscillograph, CRO (for cathode-ray oscilloscope), is a type of electronic test instrument that allows observation of constantly varying signal voltages, usually as a two-dimensional plot of one or more signals as a function of time.

Other signals (such as sound or vibration) can be converted to voltages and displayed.

CircuitWithout filter Capacitor

With Filter Capacitor

Circuit

How Circuit Works

When we run the simulation, only 2 diodes will conduct in each half cycle and will give rise to a voltage waveform which doesn’t contains any negative half of the original sinusoidal waveform.

After measuring using a probe, the rms voltage across the resistor is found to be 6.88V. So 10V signal is converted to 6.88V signal without having any negative cycle. Rest of the voltage i.e. (10-6.88) = 3.12V is the voltage drop across the diodes. Voltage drop across each diode is 1.56V.

But in practical dc application, we can’t use a DC with such a heavy ripples. So to reduce theripples, we can make use of capacitors.

(Without capacitor filter)Results

(With capacitor filter)Results

Conclusion

•In full wave bridge rectifier circuit when capacitor filter is used then it reduce the current ripple in the output of the rectifier which is not seen in the full wave bridge rectifier circuit without filter.

•While when capacitor filter is not used then the full wave bridge rectifier just acts as a normal rectifier giving a complete positive output source of the given wave form, converting negative half cycle to positive.