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Physics > Electronics > Power Electronics
 
S.C.R V - I Characteristics   (2215)

The kit consists: 0-75 Vdc @ 0.15 A, regulated power supply for anode -cathode. 0-3 Volt @ 10 ľA supply for gate - cathode. Three analog meters from which two are calibrated in dual range to take readings. One SCR, 600V/4A and one potentiometers. Built in power supply, 230V mains operated Complete with working manual & patch cords.


S.C.R Phase Control   (2216)

The kit consists: One potentiometer, Zero crossing circuit, U.J.T rex oscillator with pulse transformer, one timing capacitor, 2 SCR 600V/4A, one switch, AC supply of 50 volt and 10 volt, load resistance with AC ľAmmeter, points for CRO observations. Built in power supply, 230V mains operated Complete with working manual & patch cords.


S.C.R single Phase Full Wave Fully Controlled Bridge Rectifier   (2217)

The set up consists: Circuit based upon 4 S.C.R configured as full wave fully controlled bridge rectifier. Free run oscillator with zero crossing circuit and pulse transformer, resistive load in form of lamp and inductive load in form of a universal motor (fractional HP). One dc voltmeter across the output points and separate points for observations of waveforms. Supplied with built in line isolator 150V A. Built in power supply, 230V mains operated Complete with working manual & patch cords.


Single Phase Bridge Converter   (2218)

Set up consists: One step down transformers (150 VA), current limiting resistors, four thyristors controlled by a free running line synchronized oscillator circuit, one potentiometer to vary the speed of given dc fractional HP motor with L-C filter. One DC voltmeter connected across the output. Top see through cabinate and test points for observation of firing signals, motor current waveforms. Built in power supply, 230V mains operated Complete with working manual & patch cords.


U.J.T Characteristics and use as Rex OSC   (2219)

Kit consists: Two IC regulated dc power supplies 0-20 V olt, two meters, one UJT, two capacitor, one potentiometer with fixed value resistance. Built in power supply, 230V mains operated complete with working manual & patch cords.


S.C.R Triggering Circuits (a)   (2220)

Kit consists : components to perform the following firing methods.
a. D.C. firing method (superimosed AC).
b. Resistance firing method.
c. R-C phase shift firing method.
d. Pulse firing by UJT rex osc method (with pulse transformer). One S.C.R, RL, one voltmeter with isolated ac power supply. Built in power supply, 230V mains operated Complete with working manual & patch cords.


S.C.R Triggering circuits (b)   (2221)

The kit has one low voltage transformer, one voltmeter across RL, decade of R with one potentiometer. Built in power supply,230V mains operated. Complete with working manual & patch cords.


Study of Chopper Circuit (SCR Based Jones Chopper)   (2222)

Set up consists: DC unregulated power supply from 100 volt ac, two SCRs, one tapped inductor, one commutation capacitor, pulse firing circuit with separate contorllable on-off timings and one lamp load. A series wound universal motor for Built in power supply,230V mains operated Complete with working manual & patch cords.


Study of Inverter Circuit (Mosfet Based)   (2225)

Set up consists: Pulse generator with duty cycle control, two power mosfets, one transformer one lamp load, one volt and one ľAmmeter. Provided with 24 volt 6 Amp dc source. Built in power supply, 230V mains operated Complete with working manual & patch cords.


Series Commutated SCR Inverter   (2226)

Set up consists :- Pulse generator ( 100 - 400 Hz ) using two UJT rex with separate timing controls, two SCRs, three inductors and three capacitors. 25 watt Lamp load with two analog meters. Input supply is in form of DC 24 volt 3 Amp. Built in power supply, 230V mains operated Complete with working manual & patch cords.



SCR Parallel Inverter   (2227)

Set up consists: Pulse generator (60-90Hz nominal) with firing transformer, two SCRs, one inductor one transformer, one capacitor, two analog meters and lamp load to accommodate three lamps of different ratings. The input supply in form of DC 24 volt 6 Amp. Built in power supply, 230V mains operated Complete with working manual & patch cords.


Study of Lamp Flasher Using SCR   (2228)

Kit consists: Step down transformer 12 volt dc @ 1 amp, two SCRs, UJT relaxation oscillator with 12 volt 21 watt lamp as load. Test points to observe the commutation polarity upon CRO. Built in power supply, 230V mains operated Complete with working manual & patch cords.


Study of SCR Ring Counter   (2229)

Kit consists: DC regulated 12 volt supply three SCR with pulse gating circuit, pulse generator by timer 555, frequency control, three LEDs to observe sequence, test points for observation of commutation pulses. Built in power supply,230V mains operated Complete with working manual & patch cords.


Study of AC Chopper Using SCR   (2230)

Kit consists :- Step down transformer 25 volt ac @ 1 amp, four SCRs, 6 volt ac for zero crossing detector cum comparator circuit, 12 volt regulated dc for complete control circuit, one analog voltmeter across resistive load, pulse firing circuit with transformer and capacitor commutation circuit. Test points for observation of waveforms upon CRO. Built in power supply, 230V mains operated Complete with working manual & patch cords.


TRIAC CHARACTERISTICS   (2231)

Kit consists :- DC regulated 0 - 75 volt @ 0.15 Amp continuously variable supply for main terminals, one dc 0 - 3 volt supply for gate control, one reset key, one triac, three analog meters two of them are calibrated in dual range. Built in power supply,230V mains operated Complete with working manual & patch cords.



Speed Control of Induction Motor   (2232)

Speed control by varying voltage
Set up consists: Two antiparallel thyristors triggered by a UJT rex oscillator in synchronism of input frequency. One 1/8 HP induction motor. The set up is line operated, thus transformers are provided to isolate the points to check waveforms. Built in power supply,230V mains operated Complete with working manual & patch cords.


Speed control of induction motor   (2233)

Speed control by varying frequency
Set up consists: Thyristor based inverter circuit, firing angle control circuit with frequency variation between 40-100Hz, thyristor controlled rectifier t o obtain regulated dc for inverter circuit, one ac voltmeter ( MI type ), transformer isolation at test points, small ac induction motor. Built in power supply, 230V mains operated Complete with working manual & patch cords.


Study of AC Induction Motor Speed Control in Close Loop   (2250)

Kit consists: Op-to based speed sensing with RPM meter, firing angle controller with feedback control, small ac motor with loading arrangement, load current meter, thyristor controlled firing angle control, test points for measurements. Built in power supply, 230V mains operated Complete with working manual & patch cords.



DIAC Characteristics   (2251)

Kit consists: One 0-40 volt dc regulated power supply, one fixed 40 volt ac power supply with potentiometer, one diac, one capacitor and two analog meters. Built in power supply, 230V mains operated Complete with working manual & patch cords.



TRIAC Phase Control   (2252)

Kit consists: Triac 400 volt 2 Amp, 1:1 isolated ac supply @ 0.5 amp, provision to provision of points to measure/observe different waveforms upon CRO with 1:100 attenuation (provided). Built in power supply , 230V mains operated Complete with working manual & patch cords


Single Phase to Single Phase Midpoint Cycloconverter   (2253)

Set up consists: Four SCRs, one transformer, one midpoint tapped inductor, logic controlled firing control circuit. A selector switch is provided to obtain 1/2, 1/3 and 1/4 of input frequency f. Optoisolators are used for coupling of logic signals with the thyristors. Test points are given at different places for observations. A resistive load and an inductive load in form of small motor is provided. Built in power supply, 230V mains operated Complete with working manual & patch cords.


Single Phase Dual Converter   (2254)

Set up consists: Eight thyristors to form two bridges. L - C filter circuit, step down 150 volt AC supply @ 1Amp, circuit for firing control of thyristors. one analog centre zero ammeter and test points at various places, small dc shunt wound motor. Built in power supply, 230V mains operated Complete with working manual & patch cords.



DC Motor Speed Control (a)   (2255)

Set up consists: Silicone diode bridge with one SCR with phase control circuit to give variable dc for armature, fixed field supply, small dc shunt wound motor, double wound step down transformer, test points for observations. Built in power supply, 230V mains operated. Complete with working manual & patch cords.


SCR DC Motor Speed Control Using Chopper   (2256)

Kit consists dc regulated 100 volt supply, two silicone controlled rectifiers, one tapped inductor, two diodes, one series wound universal motor of 1/8 H.P. A small dc motor for tacho feedback, switch for open loop/close loop run, analog RPM meter, firing angle control circuit with rate feedback. loading arrangement with current meter. Test points for observations. Built in power supply, 230V mains operated Complete with working manual & patch cords.


SCR DC Motor Speed Control Using Phase Controlled Rectifier   (2257)

Kit consists dc regulated 150 volt ac supply, two silicone controlled rectifiers, two diodes, one series wound universal motor of 1/8 H.P. A small dc motor for tacho feedback, switch for open loop/close loop run, analog RPM meter, firing angle control circuit with rate feedback. Loading arrangement with current meter. Test points for observations. Built in power supply, 230V mains operated Complete with working manual & patch cords.



Thyristor Circuit Breaker with Current Limiting   (2258)

Kit consists: DC 12 volt supply with lamp load and current limit resistors, two SCR, two keys for make-break operation, commutation capacitor with current sense circuit having variable adjustment. Built in power supply , 230V mains operated Complete with working manual & patch cords.


SCR Commutation Methods Class A-E   (2259)

Kit consists: DC 30 volt supply with lamp load, two SCRs, two silicone diodes, two capacitors, one transistor. Sockets and patch cords to configure the class of commutation. Built in power supply , 230V mains operated Complete with working manual & patch cords.


SCR Bridge Inverter   (2260)

Set up consists :- Pulse generator (60-90 Hz nominal) with firing transformer, Four SCRs, one inductor one transformer, one capacitor, two analog meters and RL load to accomodate three lamps of different ratings. The input supply in form of DC 24 volt 6 Amp. Built in power supply, 230V mains operated Complete with working manual & patch cords.




 
 
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