1Φ HALF / SEMI / FULL CONTROLLED BRIDGE CONVERTER BASED WITH SPEED CONTROL OF 1/8HP PMDC MOTOR MODEL 8516-2
SALIENT FEATURES
- Completely self contained stand alone un
it - Ramp Comparator based firing scheme with isolation
- Soft Start circuit to avoid heavy inrush of
current
- Armature overload protection.
- Power circuit using Power Module for
SCR’s and Power Diodes with Snubber
circuit for dv/dt protection.
1/8HP PMDC motor
TECHSPECIFICATIONS
- Firing Circuit – Ramp Comparator firing scheme using Op-amps and gates.
- Power Circuit – i. 1Φ Half / Semi /Full Controlled Bridge using 4 SCR’s. & 2 Diodes ii. 1Φ Full Controlled Bridge using 4 SCR’s.
- Protection – i. Fuse protection
ii. Armature Overload Protection
- Controls – i. 1Φ Mains ON / OFF Switch ii. Speed Control Potentiometer
iii. FWD / REV Switch
- Meters – i. Digital Voltmeter for Armature Voltage ii. Digital Current meter for Armature Current
iii. Digital RPM Meter for speed of motor
- Indicators – i. 1Φ Indicators ii. Armature Overload
- Connectors – i. Armature to connect 1/8 PM DC Motor ii. Proximity Sensor
- Motor – 1/8 PM DC Motor
EXPERIMENTS
To study the operation of a firing circuit of a 1 phase Half / Semi / Full controlled rectifier.
- To study the operation ofa 1 phase Half / Semi / Full controlled rectifier with motor.
SPECIFICATIONS ARE SUBJECT TO CHANGE DUE TO CONSTANT
DEVELOPMENTS WITHOUT ANY PRIOR NOTICE
1 Φ AC VOLTAGE CONTROLLER TRAINER ( 8552 )
♦ Completely self – contained stand – alone unit.
♦ Demonstrates the principle and working of firing circuit using Ramp Comparator:
♦ Supply required 230V, 50 Hz AC.
♦ Triggering circuit using ZCD, Ramp Generator, Comparator, Logic Circuits and Pulse amplifier.
♦ Comparison with a reference pot.
♦ Effect of Various load of R, RL, RLC LOAD.
♦ Test points at various stages in the circuit, to observe the voltages and waveforms.
♦ Set of required number of Patch Cords provided.
♦ Housed in an elegant cabinet with a well spread intelligently designed circuit layout on the front panel.
♦ Strongly supported by a comprehensive manual complete with theory and operating details.
3 Φ AC VOLTAGE CONTROLLER TRAINER ( 8553 )
SALIENT FEATURES :
* Completely self – contained stand – al
one unit.
* Demonstrates the principle and working of 3 f firing circuit using Ramp Comparator:
* Supply required 3φ, 415V, 50 Hz AC.
* Triggering circuit using ZCD, Ramp Generator, Comparator, Logic Circuits and Pulse amplifier.
* Comparison with a reference pot.
* Effect of Various load of R, RL LOAD.
* Test points at various stages in the circuit, to observe the voltages and waveforms.
* Set of required number of Patch Cords provided.
* Housed in an elegant cabinet with a well spread intelligently designed circuit layout on the front panel.
* Strongly supported by a comprehensive manual complete with theory and operating details.
SPECIFICATIONS ARE SUBJECT TO CHANGE DUE TO CONSTANT
DEVELOPMENTS WITHOUT ANY PRIOR NOTICE
BUCK BOOST REGULATOR ( 8549 )
SALIENT FEATURES :
The Buck Boost Regulator unit is a versatile unit useful in the study & demonstration of the principle & working of a Buck Regulator and a Boost Regulator. The circuit consists of a PWM firing circuit with Power Switching device. It is housed in an elegant metal cabinet with a well spread intelligently designed circuit layout on front panel. Multi coloured test points are provided at various stages in the circuit to observe voltages & waveforms.
Techanical Specifications
BUCK Regulator
Input : 12V DC
Output : 5V DC.
Current : 1A
Circuitry : PWM Trigger Circuit.
Power Circuit : Using Power Transistor of 100V / 2A.
Load : To be connected externally using a Rheostat ( Not supplied along with the unit )
BOOST Regulator
Input : 12V DC
Output : 16V DC.
Current : 1A
Circuitry : PWM Trigger Circuit.
Power Circuit : Using Power Transistor of 100V / 2A.
Load : To be connected externally using a Rheostat ( Not supplied along with the unit )
SPECIFICATIONS ARE SUBJECT TO CHANGE DUE TO CONSTANT
DEVELOPMENTS WITHOUT ANY PRIOR NOTICE
Speed Control of D.C. Shunt Motor Using IGBT Single Quandrant Chopper kit 8557
SALIENT FEATURES
Speed Control of d.c. Shunt Motor using igbt Single Quadrant Chopper Trainer it is a very versatile and useful training kit for the various branches of Electrical and Electronics Engineering. The unit is housed in an elegant metal cabinet, with a well spread intelligently designed circuit layout on the front panel. Multi – coloured test points are provided at various stages in the circuit to observe the waveforms and voltages.
* One no. IGBT forms single quadrant chopper for armature control
* One no. IGBT forms single quadrant chopper for field control
* Micro controller based PWM generation for both armature & field circuit
* High Speed Opto coupler used for pulse isolation.
* Diode bridge converter and filter capacitor for input DC Voltage of IGBT chopper
* One Voltmeter to indicate DC rail voltage
* MCB for input ON/OFF and over current.
* Output:
> Armature circuit (0 – 200 V) DC (Variable), 5 Amp (suitable for 1 HP motor)
> Field circuit, (90 – 220 V) DC 1 Amp
> Motor : DC Shunt motor
> Rated voltage : 220 V
> Rated power : 1 HP
> Rated speed : 1500 rpm
> Load : Mechanical arrangement with spring balance
* Input : 230V AC, 50Hz
Dual Converter Trainer ( with 1HP ; 1500 rpm Motor, speed measurement and Loading Arrangement ) 8556
SALIENT FEATURES :
ADTRON’S Dual Converter Trainer Kit is a versatile stand alone unit useful in the study & demonstration of the principle & working of a DC Motor Speed Control. The circuit consists of a ramp generator, comparator, pulse transformer isolated trigger circuit with short circuit, overload protection & field failure protection. The unit is operated in Speed feedback mode only. A 3 pin socket for CRO is also provided for isolation. It is housed in an elegant metal cabinet with a well spread intelligently designed circuit layout on front panel. Multi – coloured test points are provided at various stages in the circuit to observe voltages & waveforms. The Dual Converter can be operated in circulating and non-circulating mode indicators are provided to indicate the quadrant of operations.
TECHNICAL SPECIFICATIONS
* Input : 230V, 50Hz AC 1φ.
* Output : Variable DC ( 0 – 230V ).
* Circuitry : Ramp generator, Comparator, short circuit, overload protection circuit & pulse transformer isolated trigger circuit.
* Power Circuit : Using 2 SCR’s ( 1200V, 25A ) ( i.e. Full bridge ).
* Feedback : 1. Speed.
* Protection : 1. Overload.
2. Short circuit
3. Field failure.
* Controls : 1. Speed.
2. Mode ( Circulatory / Non-Circulatory
* Indicator : 1. Drive ON.
2. +12V.
3. -12V.
4. Trip.
5. Mains ON.
* Socket : 1. 8 pin socket for connecting motor & Speed Measurement unit.
2. 3 pin socket for CRO.
* Display : 1. 3 ½ digit to indicate armature current.
2. 3 ½ digit to indicate armature voltage.
3. 3 ½ digit to indicate RPM.
* Motor : 1 HP DC Motor with speed measurement unit & Loading arrangement.
* Experiment : 1. Study of firing circuit.
2. Speed control of DC motor with Speed Feedback.
3. Direction control of DC Motor
4. Operation of speed control in circulating mode
5. Operation of speed control in non-circulating mode.
1 f Full Wave mC Bridge Rectifier 8554
SALIENT FEATURES :
Thyristorised Closed loop speed control of 3 phase Induction.
MOTOR : This trainer is designed for speed control of 3 phase induction motor using V/F method. Voltage control is obtained by 3 phase SCR fully controlled converter and Frequency control is obtained 3 phase SCR inverter. Both voltage & frequency are simultaneously controlled.
This unit consists of:
i. 3 phase fully controlled converter.
ii. 3 phase Mc – Murray Inverter.
iii. PI controller for closed loop.
iv. Motor set – up.
* Three phase fully controlled converter for Voltage
* VARIATION :
* Six Isolated gate signals for Full Bridge Converter.
* Firing Angle variable from 1800 to 00 through Ramp and pedestal control.
* Gated carrier source at 4 KHz.
* Test points are provided on the front panel for detailed study of circuit signals by the student.
* Necessary test points are terminated at sockets so that the student can monitor / measure/study the signals using CRO, DVM, etc.
* One potentiometer to vary the firing angle. monitor all the test points of the control circuitry for correct functioning.
* Six SCR’s each rated at 1200V @ 25 A, Each SCR is provided with RC snubber.
* The SCR’s are mounted on suitable heat sinks and placed inside a nicely designed cabinet.
* Facilities are provided for switching ON and OFF, the AC supply to the converter circuit with fuse and miniature circuit Breaker protection.
* Provided with one Voltmeter to indicate DC Voltage variation.
* THREE PHASE MC – MURRAY INVERTER FOR FREQUENCY VARIATION :
* Six isolated gate pulses are provided to fire the six number of SCR’s.
* One Potentiometer provided to vary the frequency of the inverter from 10Hz – 50 Hz.
* One Potentiometer provided to vary the frequency of the inverter.
* All gate pulses are Isolated by pulse isolation transformer.
* Six SCR’s rated 1200V / 25A provided.
* Six Diodes rated 1200V / 6A provided.
* 6 Nos. of Commutating capacitors and 3 Nos. of center tapped inductors (Rating at 120mH, 4A) provided.
* All 6 Nos. of SCR’s, Diodes, Capacitors & Inductors forms 3 phase inverter with 180o mode conduction.
* DC Input of inverter fed from three phase SCR converter.
* POWER SUPPLY :
* + 15V regulated DC power supply for control circuitry.
* CLOSED LOOP :
* Analog PI Controller provided for closed loop operation.
* MOTOR SETUP :
* One 1hp three phase Induction motor with spring balance load setup.
* One optical encoder is provided for the speed measurement.
* The output of optical encoder is signal conditioned & calibrated to indicate the speed of the AC motor & give feedback signal for closed loop.