Narration 1 00:00:01 --> 00:00:07 Hello everyone. Welcome to this tutorial on Transient Response of circuits. 2 00:00:08 --> 00:00:23 In this tutorial, we will study:

Transient response of RC, RL and LCR circuits

Underdamped discharge of LCR circuit

RC integration and Differentiation.

3 00:00:24 --> 00:00:32 Here, I am using:

ExpEYES version 3.1.0

Ubuntu Linux OS version 14.10.

4 00:00:33 --> 00:00:43 To follow this tutorial, you should be familiar with ExpEYES Junior interface. If not, for relevant tutorials, please visit our website. 5 00:00:44 --> 00:00:48 Let's first define transient Response of a circuit. 6 00:00:49 --> 00:01:02 Transient Response is- how a circuit responds to stored energy in capacitors or inductors.

The stored energy in a capacitor or an inductor can be dissipated by a resistor.

7 00:01:03 --> 00:01:06 Now we will demonstrate transient Response of RC circuit. 8 00:01:07 --> 00:01:17 In this experiment, we will:

Plot Step up and Step down voltage curves of RC circuit.

Measure RC in milli seconds.

9 00:01:18 --> 00:01:23 To perform this experiment, OD1 is connected to A1 through 1K resistor. 10 00:01:24 --> 00:01:33 1uF (one micro farad) capacitor is connected between A1 and ground (GND).

This is the circuit diagram.

11 00:01:34 --> 00:01:35 Let's see the result on the Plot window. 12 00:01:36 --> 00:01:42 On the Plot window, click on EXPERIMENTS button. Select RC Circuit. 13 00:01:43 --> 00:01:51 Transient response of RC Circuit and Schematic windows open.

Schematic window shows RC Circuit Transient.

14 00:01:52 --> 00:02:02 On the Transient response of RC Circuit window, click on 0 to 5V STEP button.

'Step up' voltage curve is displayed.

15 00:02:03 --> 00:02:10 Then click on 5 to 0V STEP button. Step down voltage curve is displayed. 16 00:02:11 --> 00:02:19 Click on Calculate RC button. RC = 1.14 msec is displayed. 17 00:02:20 --> 00:02:23 Click on Clear button to clear the window. 18 00:02:24 --> 00:02:30 Click on CC Charge button. A horizontal trace is seen at 4.5 volts. 19 00:02:31 --> 00:02:40 Next, we will show:

Charging of capacitor with constant current and

Measure RC in milli seconds.

20 00:02:41 --> 00:02:50 In the circuit, we will connect 1K resistor to CCS instead of OD1. This is the circuit diagram. 21 00:02:51 --> 00:02:54 Click on CLEAR button to clear the window. 22 00:02:55 --> 00:03:02 Click on CC Charge button. Voltage across the capacitor rises exponentially. 23 00:03:03 --> 00:03:11 Click on Calculate RC button. Value of RC= 5.81 mSec is displayed. 24 00:03:12 --> 00:03:16 Now we will demonstrate transient Response of RL circuit. 25 00:03:17 --> 00:03:25 In this experiment, we will:

Plot Step up and Step down voltage curves of RL and

Measure R/L.

26 00:03:26 --> 00:03:37 In this experiment,

IN1 is connected to OD1.

OD1 is connected to A1 through 1K resistor.

A1 is connected to GND through a coil.

27 00:03:38 --> 00:03:40 This is the circuit diagram. 28 00:03:41 --> 00:03:43 Let's see the result on the Plot window. 29 00:03:44 --> 00:03:50 On the Plot window, click on EXPERIMENTS button. Select RL Circuit. 30 00:03:51 --> 00:04:01 Transient response of RL Circuit and Schematic windows open.

Schematic window shows RL Circuit Transient.

31 00:04:02 --> 00:04:11 On the Transient response of RL Circuit window, click on 0 to 5V STEP button.

'Step up' voltage curve is displayed.

32 00:04:12 --> 00:04:19 Click on 5 to 0V STEP button. Step down voltage curve is displayed. 33 00:04:20 --> 00:04:25 Click on Calculate R/L button to display the values. 34 00:04:26 --> 00:04:34 L/R value is = 0.083mSec (milli second).

Rind value is =529 Ohm.

35 00:04:35 --> 00:04:49 Inductor value i s =127.6mH(milli henry).

Here- 'R' is resistance, 'L' is inductance and 'Rind' is resistance of the inductor.

36 00:04:50 --> 00:04:56 As an assignment, plot voltage curves of RL circuit using two coils connected in series. 37 00:04:57 --> 00:05:01 Now, we will show underdamped discharge of LCR circuit. 38 00:05:02 --> 00:05:06 In this experiment, OD1 is connected to A1 through a coil. 39 00:05:07 --> 00:05:14 A1 is connected to GND through 0.1uF (0.1 micro farad) capacitance. This is the circuit diagram. 40 00:05:15 --> 00:05:17 Let's see the result on the Plot window. 41 00:05:18 --> 00:05:24 On the Plot window, click on EXPERIMENTS button. Select RLC Discharge. 42 00:05:25 --> 00:05:34 EYES Junior: RLC Discharge window and Schematic windows open. Schematic window shows RLC Circuit Transient. 43 00:05:35 --> 00:05:44 On the EYES Junior: RLC Discharge window, click on 5->0V STEP button. Step down voltage curve is displayed. 44 00:05:45 --> 00:05:54 Move the mS/div slider and click on 5->0V STEP button. Underdamped discharge curve is displayed. 45 00:05:55 --> 00:06:07 Click on FIT button to display the values.

Resonant Frequency = 1.38 KHz and Damping = 0.300.

46 00:06:08 --> 00:06:17 As an assignment-

Plot overdamped discharge of LCR circuit using a 2K resistor. This is the circuit diagram.

47 00:06:18 --> 00:06:20 Now ,we will demonstrate RC integration. 48 00:06:21 --> 00:06:27 In this experiment, we will transform a square wave into a triangular wave. 49 00:06:28 --> 00:06:33 Here, SQR2 is connected to A1 through 1K resistor. This is the circuit diagram. 50 00:06:34 --> 00:06:37 Let's see the result on the Plot window. 51 00:06:38 --> 00:06:44 On the Plot window, set SQR2 to 1000 Hz. Click on SQR2 check-box. 52 00:06:45 --> 00:06:47 Move the frequency slider. 53 00:06:48 --> 00:06:55 Move the mSec/div slider to adjust the wave. A square wave is generated. 54 00:06:56 --> 00:07:04 In the same connection, connect A1 to GND through 1uF (one micro farad) capacitor. This is the circuit diagram. 55 00:07:05 --> 00:07:13 A triangular wave is generated. A square wave is transformed to a triangular wave when RC is integrated. 56 00:07:14 --> 00:07:19 Click on XMG button to show the Grace plot of the triangular wave. 57 00:07:20 --> 00:07:23 Now, we will demonstrate RC differentiation. 58 00:07:24 --> 00:07:30 In this experiment we will transform a square wave to a narrow spikes wave. 59 00:07:31 --> 00:07:39 In this experiment, SQR2 is connected to A1 through 1uF (one micro farad) capacitor. This is the circuit diagram. 60 00:07:40 --> 00:07:42 Let's see the result on the Plot window. 61 00:07:43 --> 00:07:45 A square wave is generated. 62 00:07:46 --> 00:07:54 In the same connection, connect A1 to GND through 1K Resistor. This is the circuit diagram. 63 00:07:55 --> 00:07:59 On the Plot window, set SQR2 to 100 Hz. 64 00:08:00 --> 00:08:07 Move the mSec/div slider to adjust the waves. A narrow spikes wave is generated. 65 00:08:08 --> 00:08:14 A square wave is transformed to a narrow spikes wave when RC is differentiated. 66 00:08:15 --> 00:08:18 Click on XMG button to show the Grace plot. 67 00:08:19 --> 00:08:20 Let's summarize. 68 00:08:21 --> 00:08:35 In this tutorial, we have studied:

Transient response of RC, RL and LCR circuits

Underdamped discharge of LCR circuit

RC integration and Differentiation.

69 00:08:36 --> 00:08:43 This video summarizes the Spoken Tutorial project. If you do not have good bandwidth, you can download and watch it. 70 00:08:44 --> 00:08:50 We conduct workshops using Spoken Tutorials and give certificates. Please contact us. 71 00:08:51 --> 00:08:56 The Spoken Tutorial project is funded by NMEICT, MHRD, Government of India. 72 00:08:57 --> 00:09:02 This tutorial is contributed by Kaushik Datta and Madhuri Ganapathi.Thank you for joining.