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Power Electronics
CONSTRUCTION OF FAN REGULATOR USING DIAC & TRIAC
Objective of this experiment:
To construct fan regulator circuit. The firing angle of triac can be varied and gate is triggered by the break down voltage of Diac.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
CONSTRUCTION OF SCR TRIGGERING CIRCUIT USING LDR
Objective of this experiment:
In this experiment the photocell (LDR) is used in conjunction with an SCR. The LDR triggers the SCR under proper conditions of light. The SCR in turn acts as a switch to turn the lamp that is Load either 'ON' or 'OFF'
Built in power supply: (0-18) VAC/50 Hz.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
CONSTRUCTION OF SINGLE PHASE HALF & FULLY C0NTROLLED BRIDGE RECTIFIER USING SCR
Objective of this experiment:
To construct single-phase half & fully controlled bridge rectifier. Two SCRs are used in two arms of the bridge. During positive half cycle the firing angle of SCR1 can be controlled and observed. During negative half cycle the firing angle of SCR2 can be controlled and observed on CRO. Similarly both positive & negative half cycles of applied AC signal can be rectified.
Built in power supply: 0-18V AC/50Hz
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
CONSTRUCTION OF UJT FIRING CIRCUIT FOR SCR
Objective of this experiment:
1. To construct a relaxation oscillator using UJT.
2. To fire the SCR gate using the relaxation oscillator.
3. To find the corresponding load operation of SCR.
Built in regulated power supply: +15V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
DIAC & TRIAC CHARACTERISTICS
Objective of this experiment:
1. To observe the forward & reverse V-I characteristics of Triac and plot the graph.
2. To observe the forward & reverse V-I characteristics of Diac & plot the graph.
3. To observe the break over voltages of Diac & Triac.
Built in regulated power supply: +15V/300mA, -15V/300mA, + (0- 35)V/300mA; -(0-35)V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
LAMP CONTROL USING DIAC & TRIAC
Objective of this experiment:
To construct Lamp dimmer using Diac & Triac. To build Lamp control circuit using Triac. The gate of the triac is triggered by diac (bi-directional device). The firing angle can be varied by the gate control simultaneously the brightness of the lamp can be varied.
Built in power supply: 130 VAC/50Hz
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
PHASE CONTROL OF AN SCR
Objective of this experiment:
1. To study the firing angle of SCR during positive & negative half cycle.
2. Two SCRs are connected in opposite directions & anti-parallel, are used to control the phase.
Built in power supply: 30V AC
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
SILICON CONTROLLED RECTIFIER (SCR) CHARACTERISTICS & TESTING METHODS
Objective of this experiment:
To verify that the SCR is basically a rectifier which conducts current in only one direction. However, the device can be made to conduct (turn "ON") or stop conducting (turn "OFF") and therefore provide a switching action that can be used to control electrical current. To draw the V-1 characteristics by taking different readings of anode voltage and anode current to get the forward break over (VF) and holding current (IH).
Built in regulated supply + 15V/300mA.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
SPEED CONTROL OF AC MOTOR USING TRIAC
Objective of this experiment:
1. The speed of the motor is controlled by Diac and triac.
2. The triac is bi-directional device. The gate is controlled by Diac.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
SPEED CONTROL OF MOTOR USING SCR
Objective of this experiment:
1. To control the speed of the AC motor, hand driller, etc, using SCR.
2. The gate is triggered by diac device to control the speed of motor.
3. The SCR conducts in one direction when it is triggered by a positive voltage applied between gate & cathode. The trainer is operated with 230VAC/50 Hz mains.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
UJT CONTROLLED SCR TIME DELAY CIRCUIT
Objective of this experiment:
1. To construct time delay circuit using SCR triggered by UJT. To build relaxation oscillator using UJT and the timing can be varied by different capacitors and potentiometer. The pulses generated by UJT should be given to gate for triggering. The SCR can be turned ON with reference to the input pulses.
Built in regulated, power supply: + 15V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
UNI-JUNCTION TRANSISTOR (UJT) CHARACTERISTIC AND TESTING METHODS
Objective of this experiment:
To demonstrate the operation of a typical uni-junction transistor and show a practical application of the device. You will determine the peak voltage (VP) and valley voltage (VV) and construct relaxation oscillator.
Built in regulated supply + 15V/300mA.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
VARACTOR DIODES: CHARACTERISTICS & TESTING METHODS
Objective of this experiment:
To test the varactor diode by applying reverse voltage and how the corresponding change in capacitance across PN junction. To draw the graph between applied reverse voltage (V) versus capacitance CT.
Built in regulated supply + 15V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
