Power Electronics Lab Equipments

Speed Control Of Induction Motor Using VFD Trainer Specification: Three phase IGBT based VVVF controlled AC drive suitable for 1Ph./0.5HP/ 230V induction motor.  This unit consists of DELTA or equivalent make IGBT based 3-ph VVVF drive Suitable for 0.5HP/230V induction motor.  The AC 1 phase input terminals, motor output terminals points are brought out on the front panel.  A 1pole / 6Amps MCB is provided to switch ON/OFF the AC mains supply to the unit and also for protection.  The drive has the facility to change the frequency with constant V/F (Variable voltage variable frequency) to vary the speed of the induction motor since the speed is directly proportional to the frequency. The drive has the facility to read the input voltage, output

3 Ph./0.5HP/ 230V Induction Motor. Activity to Perform: a) Make connections and Control the speed of the given single phase or three phase squirrel cage induction motor by VFD. b) Discuss the features and advantages of VFD.

EXP. 8 PLC BASED COUNTING OF MOVING OBJECTS ON TWO CONVEYORS Sequence of Operation: A manufacturing plant is arranged with 2 feeder conveyors for transferring the Objects into the plant. Develop and Execute Ladder Logic using math instruction in PLC to get the total number of objects transferred by 2 conveyors into the Plant. When the count of total object has reached pre-set count value, turn ON buzzer to give beep sound for 1 second and turn OFF the conveyors. With , Conveyor Module– 2 Nos. & Counting / Proximity Sensors – 2 Nos. DC Motor – 2 Nos. & Start / Stop Push Button Switches – 2 Nos. Interface buzzer to give beep sound

EXP: 9 PLC BASED CAR PARKING CONTROL SYSTEM* Sequence of Operation: A parking lot allows 10 cars. Sensor 1 senses the incoming car at ENTRY Gate. Sensor 2 senses the outgoing car at the EXIT Gate. Develop and Execute ladder logic in PLC to count the number of cars parked and based on the parking slot available turn ON pilot lamps to Indicate FULL or AVAILABLE. Interface suitable proximity sensors with PLC.

EXP: 10 PLC BASED FAN CONTROL FOR ENERGY CONSERVATION Sequence of Operation: Develop and Execute ladder logic in PLC to operate Fans in the Meeting Hall based on counting the number of persons entering into the Hall. Interface suitable types of sensor with PLC to sense the person entering into the hall through ENTRY Gate. Interface Low Voltage DC Fan with PLC to check the output. Assume the capacity of the Meeting Hall as 10 or something. If less than 50% of the hall capacity is filled, turn ON Fan F1 & F2. If 70 to 80% of the capacity is filled turn ON Fan F1 to F3. If greater than or equal to 90% of capacity is filled turn ON F1 to F4.

EXP: 12 PLC BASED ILLUMINATION CONTROL SYSTEM. Sequence of Operation: Develop and Execute a ladder logic program for multilevel Illumination control system. When the potentiometer reaches 25% of its value, turn ON one Lamp in the output to get minimum illumination. When the potentiometer reaches 50% of its value, turn ON two Lamps in the output to get medium illumination. When the potentiometer reaches 75% of its value, turn ON three Lamps in the output to get Maximum illumination