FEATURES
Aesthetically designed injection molded electronic desk. Master unit carrying useful experiment resources like line synchronized firing circuits, power supplies, lamp load, RLC loads, battery charging supply etc. while the central slot will hold replaceable experiment panels.
Each multi experiment panel is secured in an ABS molded plastic sturdy enclosure, and has colorful screw less overlay showing circuit and connection through sturdy 4mm banana sockets and patch chords
Set of user guide provided with each unit
|
SPECIFICATIONS
It Consists of a Master Unit and 8 Add-on Modules as follows :
Master unit
Built-in power supply
DC supply : ± 12V, 500mA
Unregulated power supply 17V / 750mA
Regulated 13.5V/3A O/P is provided as 12V battery charging supply. In absence of battery, same may be used as simulated battery source to run experiments on inverters etc.
Isolated DC supply +12V/300mA with isolated common
On board inverter transformer of Primary : 230V and
secondaries : 12 ~ 11 ~ 0 ~11 ~12/3A
On board lamp load of 15W / 230V AC provided
AC Supply
230V AC line voltage is made available on two banana 4mm sockets as well as 1.5A fuse extender for variac if used
Aux DC Power supply
Useful as field/armature supply for DC motor
Variable up to 200Vdc / 0.5Amp (phase controlled thyristor half bridge)
Field ON/OFF control with field failure relay and over current protection circuit
OR
On-board analog voltmeters (In place of Aux.DC supply)
AC voltmeter (0 ~ 300V) - 1No.
DC voltmeter (0 ~ 300V) - 1No.
LSPT panel consisting of
Two pulse transformers of 1:1:1 are provided for isolation and supplying firing pulses along with required DC power supply to experiment panel under test through 15 pin female ‘D’ connector
Selector switch of 2 pole 6 way for selecting different types of firing pulses like out of phase inverter firing using LM3525 with dead time and frequency and pulse width variation from 170Hz to 250Hz, 12.5 /25 /6.25Hz frequency gated with high frequency (3KHz) for cycloconverter, line synchronized UJT firing for converter etc.
R-L-C Load panel
Load resistor of 10 Ohm/ 40W and 100 Ohm / 10W -1no. each
Center tapped 3A choke 4mH / 16mH each - 2 nos.
DC choke 0 MH ~ 100 MH ~ 200 MH / 750mA - 1No.
Commutation capacitors of 10µF / 100V - 4 Nos.
AC paper capacitors of 4µF / 440V - 1No.
DC cap 220µF / 63V - 1No.
Diode Byt 71 (5407) - 1No.
Accessories
15 pin D connector cable assembly
4mm banana patchcords : 100mm X 10nos. and 500mm X 20nos.
Optional power scope accessory for any lab CRO for off ground differential measurements up to 1000Vdc to facilitate checking inverter / converter waveform
Optional isolation transformer (70VA, I/P, 230V, O/P 230Vac) for CRO isolation
Operating voltage
230V ± 10%, 50Hz, 75VA
_________________________________________________________________________________________________
Add-on modules as follows
1) Power semiconductor application experiment panel I
(Provided with 29 banana tags)
Triac lamp dimmer, AC fan regulator, SCR operated light sensitive switch using LDR, SCR operated temperature sensitive switch using thermistor, UJT relaxation oscillator, half and full wave phase shift controlled) rectifier using SCR, timer using SCR and UJT built in lamp load
2) Power semiconductor application experiment panel II
(Provided with 16 banana tags)
SCR phase shift controlled converter using Ic555 through opto isolator (Potentiometric)
Triac AC power control using IC 555 (Potentiometric) (Optoisolated)
SCR AC power control using UJT /PUT (Potentiometric)
Triac AC power control using UJT /PUT (Potentiometric)
SCR/Triac temperature control using thermister
SCR/Triac intensity control using LDR
Opto isolated DC switch and photo relay ( Street light control)
3) CON/ INV Panel(Provided with 48 banana tags)
SCR converter
Provided with sturdy 800V/12A SCRs (4nos) with uncommitted snubbers, 6A diodes(2nos) commutations witch, 47µ / 450V cap, Ramp cosine firing circuit. However actual working currents are limited to 3A (maximum) for safety.
Half wave and full wave fully controlled converter
AC voltage controller using lamp optionally universal motor foot mounted
SCR controlled converter 1 phase with R-L load
Effect of free wheeling diode on SCR converter performance with Inductive load
Study of SCR converter (Open loop) output with inductance inputs and capacitance input filters
Effect of source impedance on performance of SCR converters.
Study of closed loop SCR converters with resistive load
Study of full wave-half controlled SCR bridge
Resonant DC-DC converter
Advanced firing schemes
Study of H.F. gate type SCR triggering
Study of relation between control voltage and SCR converter output DC voltage using linear resistor controlled synchronized ramp firing (IC815 equivalent)
Study of linear relation between control voltage and SCR converter output using cosine firing scheme
SCR forced communication techniques
Study of forced commutation techniques for SCR, Class A, B, C, D, E, F
SCR based inverters
SCR based parallel inverter
SCR based series inverter
SCR based bridge inverter
SCR based mcmurray bedford half bridge inverter
Cycloconverter
SCR based cycloconverter
SCR based chopper
SCR based Jones chopper resisrive load, motor load (optional)
SCR based back (step dn), boost (set up), back boost chopper
4) Triggering circuit/dv/dt protection panel
(Provided with 51 banana tags and 3TPs)
SCR Triggering schemes / turn on method
Simple resistance firing circuit for upto 90 SCR firing halfwave.
Resistance - capacitor firing circuit with increased control SCR firing - halfWave and full wave
UJT/PUT based SCR trigger with series / shunt transistor controlled ramp, resistance controlled pedestal
TRIAC Trig
|
No comments:
Post a Comment