Power Electronics

AC Drive Demonstrator ( 1 f PWM Based ) 8541

8541_miniSALIENT FEATURES :

ADTRON’S AC Drive Demonstration Unit is a versatile stand alone unit useful in the study & demonstration of the principle & working of an AC drive. The circuit works on the principle of PWM with frequency & voltage control. A 1φ 1HP AC motor coupled with a Speed Measurement & loading arrangement is also provided. A 3 pin mains socket for connecting the 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 one provided at various stages in the circuit to observe voltages & waveforms.

TECHNICAL SPECIFICATIONS

*     Input                                  :           230V, 50Hz A.C.

*     Output                               :           Variable AC ( 0 to 230V. )

*     Output Frequency        :           Approx. 10Hz to 50 Hz.

*     Circuitry                           :           PWM based circuitry frequency control.

*     Power Circuit                  :           Using either MOSFET / IGBT.

*     V / F Ratio                       :            Constant.

*     Load                                   :            1HP1φ  AC motor with Speed Measurement coupled to it & loading arrangement.

*     Controls                            :            1.  Frequency Control.

                                                                  2.  FWD / STOP Switch.

                                                                  3.  REV / STOP Switch.

*     Indicator                          :            1.   Mains ON.

                                                                  2.   Multifunction LED.

*     Socket                                :            1.   8 pin socket for connecting motor & tacho.

                                                                  2.   3 pin socket for CRO.

*     Display                              :            1.    3 ½ digit to indicate AC voltage.

                                                                  2.   3 ½ digit to indicate speed in RPM.

*     Motor                                :            1 HP AC motor 3φ 230V, 50Hz with Speed Measurement & loading arrangement.

Experiments :

1.      Study the PWM firing circuit of an AC drive.

2.      Speed control of AC motor.

AC Drive Demonstrator ( 1 f Cyclo Converter Based ) 8540

SALIENT FEATURES :

ADTON’S AC Drive Demonstration Unit, 1φcyclo converter based is a versatile stand alone unit useful in the study & demonstration of the principle & working of an AC Drive for motor control. The circuit consists of firing pulse generator for generating F / 2, F / 3, F / 4 sequence to trigger the SCR’s, firing angle control & power circuit using SCR’s, 0.5 HP AC Motor load, provision to connect CRO 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.

TECHANICAL SPECIFICATIONS

*     Input                          :            230V, 50Hz, AC 1φ.

*     Output                       :            Variable AC.

*     Circuitry                   :            Discrete trigger circuit using gates to generate F / 2, F / 3 & F / 4 sequences.

*     Power Circuit         :             Using SCR’s of 1200V / 25A rating.

*     V / F Ratio               :            Constant.

*     Load                           :            0.5 HP, 1φ AC Motor with Speed Measurement

*     Controls                    :            1.      ÷ by frequency selector.

                                                          2.       Firing angle.

*     Indicator                  :            1.       Mains ON.

*     Sockets                      :            1.       8 pin socket for connecting Motor & tacho.

                                                          2.       3 pin socket for CRO.

*     Display                      :            1.       3 ½ digit to indicate AC voltage.

                                                          2.       3 ½ digit to indicate speed in RPM.

*     Motor                        :            0.5 HP AC motor 1φ 230V, 50Hz with Speed Measurement

Experiments :

1.      Study the Cyclo converter firing circuit.

2.      Speed control of AC Motor.

 

 

DC Motor Speed Control Demonstration Unit ( with 1HP ; 1500 rpm Motor, speed measurement and Loading Arrangement ) 8539

8539SALIENT FEATURES :

ADTRON’S  DC Motor Speed Control Demonstration Unit 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 can be operated in three modes namely, armature feedback, open loop & tacho feedback. A 3pin 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.

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. Half bridge ).

*     Feedback              :         1.      Armature.

                                                   2.      Tacho.

*     Protection            :        1.      Overload.

                                                   2.     Short circuit

                                                   3.      Field failure.

*     Controls                :         1.      Speed.

                                                   2. Armature – open loop – Speed measurement feedback selector switch.

*     Indicator              :         1.      Drive ON.

                                                   2.      +12V.

                                                   3.       -12V.

                                                   4.       Trip.

                                                   5.       Mains ON.

*     Socket                    :        1.       8 pin socket for connecting motor & tacho.

                                                  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 armature feedback.

3.      Speed control of DC motor with tacho feedback.

AC Motor Speed Control Demonstration Unit ( With 0.5HP 3 f Induction Motor with speed measurement ) 8538

8538_miniSALIENT FEATURES :

ADTRON’S AC Motor Speed Control demonstration unit is a versatile self contained stand alone unit useful in the study and demonstration of the principle & working of a thyristor controller for stator voltage control consists of a ZCD, Ramp generator Comparator and Pulse amplifier and power circuit using SCR’s. It is housed in an elegant cabinet with a well spread intelligently designed circuit layout on front panel. Multicoloured test points are provided at various stages in the circuit to observe voltages & waveforms.

TECHNICAL SPECIFICATION

*     Input                       :            230V, 50Hz A. C. 3φ.

*     Output                    :            Variable AC.

*     Circuitry                :            Discrete trigger circuit consisting of ZCD (Zero Crossing Detector), Ramp generator, Camparator and Pulse generator.

*     Power Circuit       :     Using SCR’s of 600 V/ 4 A rating.

*     Load                         :     The following loads are built-in

                                                 1.      Resistive (Lamp load)

                                                 2.       0.5 HP / 3φ, AC Motor.

Controls                         :      Potentiometer for firing angle Control.

Experiments :

1.      To study the nature and generation of Thyristor Control Signal.

2.      3φ Full wave AC phase control with Resistive (lamp) load.

3.      3φ Full wave AC controller for 05 HP Induction Motor.

AC Motor Speed Control Demonstration Unit ( With 0.5HP 1 f Induction Motor with speed measurement ) 8537

8537-1 copy_miniSALIENT FEATURES :

ADTRON’S AC Motor Speed Control demonstration unit is a versatile self contained stand alone unit useful in the study and demonstration of the principle & working of a thyristor controller for stator voltage control consists of a ZCD, Ramp generator Comparator and Pulse amplifier and power circuit using SCR’s. It is housed in an elegant cabinet with a well spread intelligently designed circuit layout on front panel. Multicoloured test points are provided at various stages in the circuit to observe voltages & waveforms.

 TECHNICAL SPECIFICATION

*     Input                     :           230V, 50Hz A. C. 1φ.

*     Output                  :           Variable AC.

*     Circuitry              :           Discrete trigger circuit consisting of ZCD (Zero Crossing Detector), Ramp generator, Camparator and Pulse generator.

*     Power Circuit     :           Using SCR’s of 600 V/ 4 A rating.

*     Load                       :           The following loads are built-in

                                                     1.      Resistive (Lamp load)

                                                     2.      0.5 HP / 1φ, AC Motor.

*     Controls                :           Potentiometer for firing angle Control.

 Experiments :

1.       To study the nature and generation of Thyristor Control Signal.

 2.      1φ Full wave AC phase control with Resistive (lamp) load.

3.       1 φFull wave AC controller for 05 HP Induction Motor.

Chopper Using MOSFET 8535

SALIENT FEATURES :

ADTRON’S Chopper using MOSFET is a self contained stand alone unit useful in the study and demonstration of the principle and working of a Chopper circuit suing MOSFET. It consists of a DC Source, Control Circuit (Firing Circuit), Power Circuit and DC output. The DC Output drives a bulb load. 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      :           Step Down Chopper.

*     D. C. Source               :           220V DC (Unregulated).

*     Trigger Circuit          :           VCO and Comparator based Transistorised Firing Circuit.

*     Output Voltage        :           Variable Upto 220V DC.Frequency of

*     Operation                   :           1 KHz.

*     Duty Cycle                 :           Variable Upto 75%.

*     Load                             :           100W Lamp.

*     Controls                      :           1. Mains ON / OFF.

                                                           2. Duty Cycle Adjust.

*     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 MOSFET based Chopper Circuit.

2.      Observe the output voltage with Lamp Load.

3.      Observe the effect of Duty Cycle Variation on Load.

*     Standard Accessories      :      Detailed Instruction Manual.

Step DOWN Transistorised Chopper 8534

SALIENT FEATURES :

ADTRON’S  Step Down Transistorised Chopper is a self contained stand alone unit useful in the study and demonstration of the principle and working of a Transistorised Step Down Chopper. It consists of a DC Source, Control Circuit (Firing Circuit), Power Circuit and DC output. The DC Output drives a bulb load. 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         :           Step Down Chopper.

*     D. C. Source                  :           220V DC (Unregulated).

*     Trigger Circuit             :           VCO and Comparator based Transistorised Firing Circuit.

*     Output Voltage           :            Variable Upto 220V DC. Frequency of

*     Operation                      :            1 KHz.

*     Duty Cycle                    :            Variable Upto 75%.

*     Load                                :            100W Lamp.

*     Controls                         :            1. Mains ON / OFF.

                                                               2. Duty Cycle Adjust.

*     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 Transistorised Step Down Chopper Circuit.

2.      Observe the output voltage with Lamp Load.

3.      Observe the effect of Duty Cycle Variation on Load.

*     Standard Accessories      :      Detailed Instruction Manual.

Step UP Transistorised Chopper 8533

8533SALIENT FEATURES :

ADTRON’S Step UP Transistorised Chopper is a self contained stand alone unit useful in the study and demonstration of the principle and working of a Transistorised Step Up Chopper. It consists of a D. C. Source, Control Circuit (Firing Circuit), Power Circuit and D. C. Output. The D. C. Output drives a bulb load. 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         :      Step Up Chopper.

*     D. C. Source                  :      12V/10A (Not provided by us)

*     Trigger Circuit             :      VCO and Comparator based Transistorised Firing Circuit.

*     Output Voltage           :       Variable Upto 220V DC.

*     Duty Cycle                    :       Variable Upto 75%.

*     Load                                :       100W Lamp.

*     Controls                         :       1] Mains ON / OFF.

                                                          2] Duty Cycle Adjust.

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

*     Indicator                       :       Mains ON / OFF.

Experiments :

1]      Study of Transistorised Step Up Chopper Circuit.

2]      Observe the output voltage with Lamp Load.

3]      Observe the effect of Duty Cycle Variation on Load.

*     Standard Accessories      :      Detailed Instruction Manual.

Morgan’s Chopper ( Current Commutated Chopper ) 8532

8532SALIENT FEATURES :

ADTRON’S  Morgan’s Chopper is a self – contained stand unit useful in the study and demonstration of the principle and working of a Morgan’s Chopper. It consists of a D.C. Source UJT Triggering Circuit of variable frequency, Class “B” 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        :           Morgan’s Chopper.

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

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

*     Commutation             :            Class “B” Type.

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

*     Controls                        :            1. Mains ON / OFF.

                                                              2. Frequency Control.

                                                              3. Load 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 Morgan’s Chopper.

2.      Observe the output voltage with Motor Load.

3.      Observe the effect of Load Control on Output.

*     Standard Accessories      :      Detailed Instruction Manual.