Power Electronics

Jone’s Chopper ( Voltage Commutated Chopper ) 8531

8531SALIENT FEATURES :

ADTRON’S Jones Chopper is a self-contained stand unit useful in the study and demonstration of the principle and working of a Jones Chopper. It consists of a D.C. Source, UJT Triggering Circuit of variable frequency, Class “D” Commutation and D.C. Output the D.C. Output drives a D.C. Motor. The unit is housed in an elegant metal cabinet, with a well spread intelligently designed circuit layout on the front panel. Multicoloured Test Points are provided at various stages in the circuit to observe the waveforms and voltages. It is strongly supported by a comprehensive Instruction Manual complete with theory and operating details.

TECHNICAL SPECIFICATIONS

*     Principle                   :           Conversion of a Fixed DC to Variable DC Voltage.

*     Type of Chopper    :           Jones Chopper.

*     D.C. Source              :           24V DC (Unregulated).

*     Trigger Circuit        :           1. UJT Trigger Circuit with variable trigger frequency to trigger the Main SCR.

                                                          2. UJT Trigger Circuit with variable trigger frequency to trigger the Auxiliary SCR.

*     Commutation           :           Class “D” Type.

*     Output Voltage        :           5V to 20V approximately (variable).

*     Output Frequency  :           30V to 100Hz approximately.

*     Duty Cycle                 :           20 to 70% at 50Hz approximately.

*     Controls                      :           1] Mains ON / OFF.

                                                           2] Frequency Control.

                                                           3] ON Time Control.

*     Test Points                 :          Multicoloured Test Points are provided at various stages in the circuit to observe the waveforms and voltages.

*     Indicator                    :           Mains ON / OFF.

Experiments :

1]      Study of SCR Trigger Circuit for a Jones Chopper.

2]      Observe the output voltage with Motor Load.

3]      Observe the effect of ON Time Control on Output.

*     Standard Accessories      :           Detailed Instruction Manual.

1 f Bridge Inverter Using IGBT 8529

8529-2_miniSALIENT FEATURES :

ADTRON’S Single φ Bridge Inverter using IGBT Training Kit, is a very versatile & useful training kit system for the various branches of Electrical & Electronics Engineering. It is a compact, self – contained, which demonstrates the principle & working of a Transistorised Bridge Inverter. It consists of PWM technology for generating firing pulses, input rectifier; output 230V AC with output frequency variable from 30 – 100 Hz and over current protection circuit.

TECHNICAL SPECIFICATION

*     Input                            :      230V, 50Hz AC rectified to 300V DC.

*     Output                         :       230V AC.

*     Output Frequency  :      Variable from 30 Hz – 100Hz.

*     Circuitry                     :       It consists of 230V 1φ rectified with filter, PWM generation circuit power Circuit using 4 IGBT’s and over current protection circuit opto isolation circuit & PWM generation circuit.

*     Power Circuit           :        Using 4 IGBT’s

*     Load                             :        1. Resistive (Lamp Load).

                                                        2. Inductive (Inductor Load).

1 f PWM Inverter Using Transistor 8527

8527_miniSALIENT FEATURES :

  ADTRON’S Transistorised PWM Inverter is a self contained stand alone unit useful in the study and demonstration of the principle and working of a Transistorised PWM Inverter. It consists of a DC Source, UJT triggering Circuit of variable frequency and AC output. The load capacity of the Inverter is 500 VA. The unit is housed in an elegant metal cabinet, with a well spread intelligently designed circuit layout on the front panel. Multicoloured Test Points are provided at various stages in the circuit to observe the waveforms and voltages. It is strongly supported by a comprehensive Instruction Manual complete with theory and operating details.

TECHNICAL SPECIFICATIONS

*     Principle                             :           Conversion of DC to AC using Transistor’s

*     Type of Inverter           :           Transistorised PWM Inverter.

*     D. C. Source                      :            12V DC

*     Trigger Circuit              :            Digital Trigger Circuit with variable Trigger Frequency.

*     Output                                 :            AC 230V, 500 VA approximately.

*     Load                                      :            Lamp Load (100 W).

*     Controls                             :           1] Mains ON / OFF.

                                                                      2] Potentiometer for variable Trigger Frequency.

Test Points                                :           Multicoloured Test Points are provided at various stages in the circuit to observe the waveforms and voltages.

Indicator                                    :           Mains ON / OFF.

Experiments 

1]      Study of Digital Trigger Circuit for Transistorised PWM Inverter.

2]      Effect of variation of the triggering frequency on the output voltage.

3]      Variation of output voltage with load.

Standard Accessories        :      Detailed Instruction Manual.

1 f SCR Parallel Inverter 8524

SALIENT FEATURES :

                         ADTRON’S 1f SCR Parallel Inverter is a self – contained stand – alone unit useful in the study and demonstration of the principle and working of a Single Phase SCR Parallel Inverter. It consists of a DC Source, Triggering Circuit of variable frequency, Class ‘C’ Commutation and AC output. The load capacity of the Inverter is 500 VA. 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. It is strongly supported by a comprehensive instruction manual complete with theory and operating details.

 TECHNICAL SPECIFICATIONS :

*          Principle                    :             Conversion of DC to AC using SCR’s.

*          Type of Inverter          :             Parallel Inverter.

*          DC Source                  :             12V DC.

*          Trigger Circuit            :              UJT Trigger Circuit ( Fixed Frequency ).

*          Trigger Frequency      :              50Hz approximately.

*          Commutation              :              Class “C” Type.

*          Output                        :              230V AC, 500 VA approximately.

*          Load                           :              Lamp Load ( 100W ).

*          Controls                      :             Mains ON / OFF.

*          Test Points                  :              Multi – coloured test points are provided at various stages in the circuit to observe the waveforms and voltages.

*          Indicator                      :              Mains ON / OFF.

*          Standard Accessories  :      Detailed Instruction Manual.

 EXPERIMENTS :

*          Study of SCR Trigger Circuit for Class C Parallel Inverter.

*          Observe the output voltage with Resistive load.

*          Variation of output voltage with load.

 

1 f SCR Series Inverter 8523

8523_miniSALIENT FEATURES :

ADTRON’S 1 f SCR Series Inverter kit, it is a very versatile and useful training kit for the various branches of Electrical and Electronics Engineering. It is a compact, UJT based, self – contained trainer kit demonstrating the principle and working of a SCR Series Inverter. It consists of 24V / 2A DC input supply, UJT based firing circuit, power circuit using SCR, class “A” commutation circuit ( LC ), output step up transformer of 150VA and resistive ( Lamp ) load. 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.

TECHNICAL SPECIFICATIONS :

*          Input                         :       24V / 2A DC.

*          Output                      :       150 – 250V AC.

*          Output Frequency     :       30 Hz – 70Hz variable.

*         Circuitry                    :       It consists of input DC supply, UJT based firing circuit, power circuit using SCR’s, output step up transformer of 150V, LC commutation circuit and resistive lamp load.

*         Power Circuit                               :       SCR based.

*         Output Frequency Variation        :        With potentiometer.

*         Output Transformer                      :      150V A.

3 f Cyclo Converter 8522

8522-1_miniSALIENT FEATURES :

It is an experimental kit for converting AC input voltage into variable AC output Voltage with the change in output frequency.

1. Line Synchronized Firing angle circuit.

2. Soft start.

3. Output frequency can be 1/3rd  or ½ of the input frequency.

4. Availability of test points at strategic locations for observations of respective waveforms on CRO.

5. Variable frequency / Variable output voltage.

6. Over current / dv / dt protection.

TECHNICAL SPECIFICATION :

*          Input : 3φ  440V, 50 Hz.

*          Output : AC 100 to 200V.

*          Frequency : Selectable

                             →     1/2 Finput.

                             →     1/3 Finput.

                             →     1/4 Finput.

3 f Full Controlled Bridge Rectifier 8520

8520_miniSALIENT FEATURES :

*          Completely self – contained stand – alone unit.

*          Demonstrates the principle and working of 3 φ Half Wave Controlled Bridge Rectifier using SCR.

*          Trigger circuit separate for each phase.

*          Trigger circuit using Ramp Comparator Scheme.

*          Step down 3 φ AC supply 110V star connected is provided so that phase control can be observed on lamp.

*          Resistive ( lamp ) and RL load is provided.

*          Firing angle can be controlled from about 300 to 1700.

*          Firing angle potentiometer is provided.

*          3 φ Bridge consisting of 6 SCR’s.

*          Supply required 3 φ 440V, 50Hz AC.

*          Test points at various stages in the circuit, to observe the voltages and waveforms.

*          Set 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.

*          Experiments :

1.           To study the nature and generation of Control Signal for 3φ Fullwave Controlled Rectifier.

2.           To study the operation of a 3φ Fullwave Controlled Bridge Rectifier with R Load.

3.           To study the operation of a 3φ Fullwave Controlled Bridge Rectifier with R – L Load.

4.           To study the effect of Free Wheeling Diode on the output waveform.

3 f Half Controlled Bridge Rectifier 8519

8519_miniSALIENT FEATURES :

*          Completely self – contained stand – alone unit.

*          Demonstrates the principle and working of 3 φ Half Wave Controlled Rectifier using SCR.

*          Trigger circuit separate for each phase.

*          Trigger circuit using Ramp Comparator Scheme.

*          Step down 3 φ AC supply 110V star connected is provided so that phase control can be observed on lamp.

*          Resistive ( lamp ) and RL load is provided.

*          Firing angle can be controlled from about 300 to 1700

*          Firing angle potentiometer is provided.

*          3 φ Bridge consisting of 3 SCR’s and 3 diodes.

*          Supply required 3 φ 440V, 50Hz AC.

*          Test points at various stages in the circuit, to observe the voltages and waveforms.

*          Set 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.

*          Experiments :

                 1.         To study the nature and generation of Control Signal for 3φ Halfwave Controlled Rectifier.

                 2.         To study the operation of a 3φ Halfwave Controlled Bridge Rectifier with R Load.

                 3.         To study the operation of a 3φ Halfwave Controlled Bridge Rectifier with R – L Load.

                 4.         To study the effect of Free Wheeling Diode on the output waveform.