Battery Charger Using Single Diode Clipper
Category: Miscellaneous
Designer: RANA MUHAMMAD ADNAN KHALIL
Notes
This circuit is designed and simulated in Proteus 7.10. In this circuit you will learn how a diode voltage clipper is used to charge the battery. This circuit is very simple and easy to understand. To understand this circuit, see previous circuit "Single Diode Voltage Clipper" in Analog Circuit category. The working of this circuit is given below. 1. This circuit consists of just two components, a resistor and a diode. 2. A sinusoidal (sine wave) signal of peak amplitude 6V and 50Hz is applied at the input. 3. A resistor is placed in series with the input signal and diode. 4. The output wave form is taken across the diode D1 anode and negative terminal of the battery. 5. The oscilloscope is connected at both input and output points to see the difference of input and output waveform. 6. The input wave is shown in yellow color and its ground (reference) point is shown in pink line. 7. The output wave is shown in blue color and its groud (reference) point is shown in green line. 8. The sinusoidal wave has two cycles, positive and negative. 9. When positive cycle comes, the diode D1 is forward biased, and current will flow through the circuit and battery is charged in this cycle. 10. As we know from previous rectifier circuits that voltage drop across the diode is 0.7V, which can be seen in output wave form, and remaining voltage will drop across resistor. The output voltage will be battery voltage + diode voltage. 11. Current will only flow when diode is forward bias, and diode will be forward bias when input voltage is greater than battery voltage + diode voltage (0.7V). 12. When negative cycle comes, the diode D1 becomes reverse bias and it cannot conduct, which means the diode is off and circuit is open and no current will flow through resistor, so voltage drop across resistor is zero. Therefore we see all the voltages at output. But battery will not charge, because diode is reverse bias and no current is flowing in this cycle. 13. So, we see that positive cycle is clipped (reduced) at 0.7V + battery voltage and negative cycle is not clipped, it appears as it is at output. 14. As only one side of input wave is clipped, therefore this circuit is called single side diode voltage clipper. 15. Input voltage must be greater than the battery voltage + diode voltage. If your battery is of 12V, then input voltage should be 15V. Application: 1. This circuit can be used to clip the voltage. 2. This circuit can be used to understand the diode clipper. 3. This circuit can be used to charge the battery. Note: New circuits are added on daily, weekly and monthly basis. So come back daily to get new amazing circuits. In next circuits more advance clipper and clamper will be shown.