Power Electronics Lab Manual

Shree Balaji Electronics

POWER ELECTRONICS LAB

1.VI Characteristics of SCR, TRIAC & MOSFET

2.To measure the latching and holding current of a SCR

Feature:-

SPECIFICATION FRONT PANEL DETAILS:

1. Power :: Mains ON/OFF switch with indicator

2. Devices :: 6A/600V SCR,TRIIAC & MOSFET

3. Power Supply :: 0-15V/250mA,, 0-35V/500mA

4.Load :: 2.5K OHMS/25W

5. Digital Meters :: 0-20mA/0-20V, 0-200V, 0-2 A

6. Protection :: Fuse, Heat sink

EXPERIIMENT

� To draw static characteristics off SCR,, TRIIAC & MOSFET

� To measure the latching and holding current off a SCR

3.Study of the V-I characteristics of UJT

Features:-

SPECIFICATIONS/FRONT PANEL DETAILS:

1. Power :: Mains ON/OFF switch with indicator

2. Devices :: 8A/600V MOSFET,IIGBT

3.Power Supply :: 0-15V/250mA,0-35V/500mA

4. Load :: 2.5K OHMS/25W

5.Digital Meters:: 0-20V for VE,0-200V for VBB,, 0-200mA for IE

6.Protection :: Fuse, Heat sink

EXPERIIMENT

� To draw static characteristics off UJT

4. (a) Study of the synchronized UJT triggering circuit.

SPECIFICATION/FRONT PANEL DETAILS

1. Power :: Mains ON/OFF switch with indicator

2.Devices :: 4A/400V SCR

3. Power Supply :: 0-12V/1A, AC

4. Load :: 100OHMS/10W

5.Circuit : Line synchronized UJT relaxation oscillator circuit

6. Protection :: Fuse , Heat sink

EXPERIIMENT

� To construct SCR HWR//FWR using UJT Triggering

4. (b) Study of the cosine controlled triggering circuit

SPECIIFIICATIIONS FRONT PANEL DETAIILS

1. Power :: Mains ON/OFF switch with indicator

2.Devices :: 16A/1200V SCR

3. Power Supply :: 0--12V/1A,, AC

4. Load :: 100OHMS/10W

5. Circuit:: Line synchronized cosine Triggering circuit

6. Protection :: Fuse,, Heat sink

EXPERIIMENT

� To construct SCR Rectifier using cosine Triggering

5. Study of the single phase half wave controlled rectifier and semi converter

circuit with R and R-L Load

Isolation Transformer L Load

1Ph half bridge firing unit

SPECIIFIICATIIONS//FRONT PANEL DETAIILS

Power Circuit :: 5A//250V

1.Devices :: 25A/1200V SCRs – 2No, Diode 3 No

2. Protection:: 6A MCB, 5A Fuses, Heat sink, Snubber ckts

3. Meters :: 5A Ammeter, 300V voltmeter

Firing Circuit

1. Power :: Mains ON/OFF switch with indicator

2.Gate pulses :: Two isolated Gate pulses

3.Testing points :: Four testing points

4. Firing Angle :: 0--180 through potentiometer

Input Source :: Through suitable isolation transformer

Loads :: Works with Suitable R, RL, Motor loads

1Ph half bridge Power Ckts

Experiments

� Single phase half wave controlled rectifier and semi converter circuit with R and R--L Load

6. Study of single phase full wave controlled rectifier circuits (mid point and

Bridge type) with R and R-L Load

1Ph Full bridge firing unit 1Ph Full bridge Power Ckts

SPECIIFIICATIIONS FRONT PANEL DETAIILS

Power Circuit :: 5A/250V

1. Devices :: 25A/1200V SCR – 4Noss,Diode 1 No

2. Protection :: 6A MCB, 5A Fuses , Heat sink

3. Meters :: 5A Ammeter, 300V voltmeter

L Load Isolation Transformer

Firing Circuit

1. Power :: Mains ON/OFF switch with indicator

2. Gate pulses :: Four isolated Gate pulses

3. Testing points :: Four testing points

4.Firing Angle :: 0--180 through potentiometer

Input Source :: Through suitable isolation transformer

Loads :: Works with Suitable R,RL, Motor loads

Experiments

� Single phase fully wave controlled rectifier circuits (mid point and Bridge type) with R and R--L Load

7. Study of three phase full wave controlled rectifier circuits (Full and Semi converter) with R and R-L Load

3Ph half/fully controlled bridge firing unit 3Ph half/fully controlled bridge Power Circuit

L Load Isolation transformer

SPECIFICATION FRONT PANEL DETAIILS

Power Circuit :: 5A/430V

1. Devices : 25A/1200V Scars – 6Noss, Diode 4 No

2. Protection:: 6A MCB, 5A Fuses, Heat sink, Snubber

3.Meters :: 5A Ammeter, 500V voltmeter

Firing Circuit

1. Power :: Mains ON/OFF switch

2. Gate pulses :: Six isolated Gate pulses

3. Testing Points :: Eight testing points

4. Firing Angle :: 0--180 through potentiometer

Input Source

:: Through suitable isolation transformer

Loads :: Works with Suitable R,, RL,, Motor loads

Experiments

� Three phase full wave half/fully controlled rectifier circuits with R and R-L Load ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Plot No-1775, 3rd Lane, Chintamaniswar, Bhubaneswar-751006 Phone: 0674-2314422, 6451025.Mob-09861445071 E-mail:[email protected], [email protected], www.shreebalajiedu.com

8. Study of the forward converter (Buck converter) and fly back converter (boost converter) operation.

SPECIFICATION FRONT PANEL DETAIILS:: 1. Power :: Mains ON/OFF switch with indicator

2. Devices:: 16A/800V MOSFET--1Nos,

16A/1200V Diodes--2Nos

3. Inductor :: 100 mH

4. Capacitor :: 4..7 µF

5. Protection :: Fuse,, Heat sink,, Snubber ckts

6.Frequency :: 25Hz--100Hz

7. Duty cycle :: 10% to 90%..

8. Gate signals :: One isolated gate signals

EXPERIIMENT

� To construct & to study forward converter and

fly back converter

9. Study of the single phase PWM voltage source inverter.

SPECIFICATION

1. Devices :: 30A/1200V IGBT-4Nos, Diodes-

4Nos

2. DC Supply :: 0--200V Variable DC power

supply

3. Gate pulses :: Four isolated Gate pulses

4. Frequency :: 20 Hz to 50 Hz

5. Modulation :: Sinusoidal modulation 0-100%

index

6. Display :: For modulation index & frequency

7. Load :: Works with R,, RL & Motor load

10. Study the performance of three phase VSI with PWM control.

SPECIFICATIONS FRONT PANEL DETAIILS

1.Power :: Mains ON//OFF switch with indicator

2. Devices:: 30A/1200V IGBTs-6Nos, 16A/1200V

Diodes--6Nos

3.DC Supply :: 0-200V Variable DC power supply

4. Gate pulses :: Six isolated Gate pulses

5. Testing Points :: Six testing points

6. Frequency :: 20 Hz to 50 Hz

7.Load :: Works with R,, RL & Motor load

Experiments

� To construct & to study three phase VSI with PWM

controls.

11. Study the performance of single phase AC Voltage controller with R and R-L Load

SPECIFICATION FRONT PANEL DETAIILS

1. Power Device :: 16A/1200V TRIIAC – 1Nos,,

2.Protection :: Fuses, Heat sink,, Snub err ckts

3. Power :: Mains ON/OFF switch with indicator

4. Firing Circuit :: Line synchronized Triggering circuit

5. Firing Angle :: 0-1800 through potentiometer

6. Gate pulses :: Two isolated Gate pulse

7. Testing Points :: Six testing points

Input Source

:: Through built-in 24V isolation transformer

Loads :: Works with R,, RL load

Experiments

� AC Voltage controller with R and R-L Load

12. Study of the resonant inverter.

1. Power :: Mains ON/OFF switch with indicator

2. Devices :: 16A/1200V SCR-2Nos

3.Inductor :: 100-0-100 mH

4.Capacitor :: 4.7 µF-2Nos

5. Protection :: Fuse, Heat sink,Snub err ckts

6. Frequency :: 25Hz-100Hz

7.Gate signals :: Two isolated gate signals

Experiments

� To construct & to study Resonant Inverter