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Product Detail


Description:

Electrical Machine Trainer

The Electrical Machine Trainer system is provided with specially designed integrated machines of nominal 300 W / 0.5 HP rating. Control Panels containing power supplies, drives, loading arrangements, electronic and digital instruments are provided along with Machines. The training system is suitable to study a wide range of electrical machine syllabi starting from the basic principle and operation to the detailed study of characteristics of different types of AC and DC Machines

 

This Machine Trainer consists of the following Machine and Control Panel Sets:- Machine Set - 1

0.5 HP / 180 V / 1500 RPM / DC Integrated Machine, Coupled with 350 VA / 3 Phase / 415 V / 1500 RPM / Star connected / Rotor Wound / Stator Excited / 220 V DC Separate excitation / Manually regulated / 3 Phase Synchronous Machine with Damper winding. Provided with base and couplings. DC Machine will be Trunnion Mounted Dynamometer type with Linear scales (2 nos.) for torque measurement. DC Machine can run as DC Shunt, Series & Compound Motor as well as Generator. 3 Phase Synchronous machine can run as 3 Phase Synchronous Alternator & 3 Phase Auto Synchronous Motor

 

Machine Set - 2

0.5 HP / 415 V Stator / 200 V Star connected Rotor / 1440 RPM / 3 Phase / Slip Ring Induction Motor complete with Mechanical Loading Arrangement having Aluminum Drum Mounted on Motor Shaft, Linear spring balances (2 nos.), Friction belt & necessary frame work for Torque Measurement

 

Machine Set - 3

0.5 HP / 415 V / 1440 2880 RPM / 3 Phase / SQ. Cage Induction Motor with Dhalandar Winding for 2 speed operation. Complete with Mechanical Loading Arrangement having Aluminum Drum Mounted on Motor Shaft, Linear spring balances (2 nos.), Friction belt & necessary frame work for Torque Measurement

 

Machine Set - 4

0.5 HP / 230 V / 1 Phase / 1440 RPM / SQ. cage Induction Integrated Motor. Complete with Mechanical Loading Arrangement having Aluminum Drum Mounted on Motor Shaft, Linear spring balances (2 nos.), Friction belt & necessary frame work for Torque Measurement. This Motor can run as Capacitor Start Capacitor Run (CSCR), Capacitor Start Induction Run (CSIR) and Split Phase Single Phase Sq. Cage Induction Motor

 

Note: Specifications are subject to change.

 

Machine Set - 5

0.5 HP / 160 V DC  220 V AC / 1500  2000 RPM / Universal (AC Series) Motor. Complete with Mechanical Loading Arrangement having Aluminum Drum Mounted on Motor Shaft, Linear spring balances (2 nos.), Friction belt & necessary frame work for Torque Measurement

 

Machine Set - 6

0.5 HP / 230 V AC / 1500 RPM / Repulsion Motor Complete with Mechanical Loading Arrangement having Aluminum Drum Mounted on Motor Shaft, Linear spring balances (2 nos.), Friction belt & necessary frame work for Torque Measurement

 

Control Panel (Common for all Machine sets)

Control Panel is made of 16 SWG SS Sheet metal with Poly Carbonate Facia displaying Mimic diagrams. The Control Panel will consist of the following components:-

  • •      Digital DC Ammeters 3 Nos
    • Digital AC Ammeter
      • Digital DC Voltmeters 3 Nos
      • Digital AC Voltmeter
      • 3 Phase / 1E AC Combimeter
      • Digital RPM Indicator with sensor
      • Single Phase DC Thyristor Power Supply 3 Nos
      • 1 Phase Resistive Load Bank
      • 3 Phase Resistive Load Bank
      • DOL cum Star Delta starter
      • DC Starter
      • Field Regulator
      • Fix resistance as Field Diverter
      • 3 Phase Variac (External) and all other required Indicators, switches, MCB & Educational Type terminals

 

Note : Individual Control panels for each machine set can be provided at an extra cost to facilitate multiple student batches to perform experiments simultaneously

 

Salient features

  • Control Panel contains all safety and tripping measures
    • Panel has Polycarbonate Facia with mimic diagrams of components with all terminals brought outside for easy and shock free connections
    • The trainer unit covers a wide range of machine syllabus. More than 45 experiments can be conducted
    • Easy and safe wiring due to use of colour coded & Electrically insulated terminals (binding posts) on Top
    • Dynamically balanced rotors to minimise vibration / noise
      • Acrylic viewing window is provided to observe internal structure of machine and to make students familiar with parts of the machines like commutator, slip ring, brush holder, carbon brush, stator, rotor, centrifugal switch etc
      • Digital indication of electrical parameters like Voltage, Current, RPM, etc. giving a broad introduction of measuring instruments
        • Separates Machines with Common Control Panel of option for individual Control Panels which enables multiple batches of students to conduct experiments simultaneously
        • Performance conforming to IS/IES Standards
        • Complete Hard and Soft copy of Manual

 

List of Practicals that can be covered by Electrical Trainer Unit At a glance DC Integrated Machine

  • Speed torque characteristic for self/separately excited Shunt Motor
  • Speed torque characteristic for over/under/level excited compound Motor
  • Speed torque characteristic for Series Motor
  • Study of cumulative and differential compounded motor
  • Swinburne's test on DC Machine
  • Starting methods of DC Machine using 2P/3P/4P Starters
  • Speed control of Shunt Motor using armature/field control
  • Speed control of Compound Motor using armature/field control
  • Speed control of Series Motor using armature control
  • O.C.C on DC Generator
  • V/I characteristic for separately/self excited DC shunt Generator
  • V/I characteristic for over/under/level excited Compound Generator
  • V/I characteristic for Series Generator
  • Study of cumulative and differential compounded Generator
  • Efficiency curve for DC integrated Machine
  • Study of a Dynamometer

 

3 Phase AC Synchronous Machine

  • Load characteristic of 3 phase Synchronous Motor
  • V curve/inverse V curve for 3 phase synchronous machine
  • Current Locus for Synchronous Motor
  • Voltage regulation of Three Phase Alternator by EMF, MMF & Direct Loading(UPF)
  • Load characteristic of 3 phase Alternator
  • O.C.C/S.C.C. test for 3 phase Alternator
  • Slip test for 3 Phase Synchronous machine
  • Efficiency curve 3 Phase Alternator and synchronous Motor

 

Universal Motor

  • Load test of Universal Motor with AC supply
  • Load test of Universal Motor with DC supply
  • Speed control of Universal Motor
  • Efficiency curve for Universal Motor

 

1 Phase AC Integrated Machine

  • Load characteristic of 1 Phase AC Motor as capacitor start-induction run
  • Load characteristic of 1 Phase AC Motor as capacitor start-capacitor run
  • Load characteristic of 1 Phase AC Motor as split phase
  • Blocked rotor Test
  • Efficiency curve for 1 phase AC Induction Motor

 

3 Phase AC Integrated Machine

  • Load characteristic of 3 Phase Slip Ring Induction Motor
  • Star/Delta starting of 3 Phase Slip Ring Induction Motor
  • DOL starting of 3 Phase Slip Ring Induction Motor
  • Load characteristic of 3 Phase self start Synchronous Induction Motor
  • Blocked rotor test
  • Efficiency curve for 3 phase Slip Ring Induction Motor

 

Repulsion Motor

  • Load test of Repulsion Motor
  • Speed control of Repulsion Motor. (with Brush Adjustment)
  • Efficiency curve for Repulsion Motor
  • Load characteristic of 3 phase SQIM @ 2 Pole & 4 Pole
  • DOL starting of 3 phase SQIM
  • Blocked rotor test
  • Efficiency curve for 3 phase SQIM
  • To study Dhalandar Winding. (2 Pole  4 Pole connection)

3 Phase Sq. Cage Induction Motor

 

MG Set

  • 3 phase AC to DC converter & vice versa

 

TECHNICAL DATA SHEET

Common Specifications

•      Frame : 90 /100 Watts : 300/375 RPM : 1500

  • Insulation Class : B Enclosure : SPDP /IP22 Duty : S1 (Continuous)
  • Cooling : IC01 Mounting : B3 ( Foot ) Hz. : 50 ( if AC )

 

DC Integrated Machine

  • Field V : 180 Field A : 0.45
  • Armature V/A For MotoR : 180 V / 2 A
  • Shunt Generator : 170 V / 1.75 A
  • Series Generator : 120 V / 2.5 A
  • Compound Generator : 190 V / 1.6 A

 

3 Phase Synchronous Machine

  • ROTOR : 415 V / 0.6 A / 3 Phase 4 W AC
  • Star Connection
  • Stator : 220 V / 0.5 A DC
    • Volts : 230 Hz : 50
    • AMPS : CSCR : 2.6 A CSIR : 4.7 A
    • Split Phase : 4.7 A

Single Phase Ac Integrated Machine

 

Three Phase AC SQIM (2 Speed)

  • With Dhalandar Winding
  • Hz : 50 VOLTS : 415

•      0.5 HP AMPS : 1.0 RPM : 1500

  • HP AMPS : 2.0 RPM : 3000

 

Repulsion Motor

  • AC
  • Volts 230
  • AMPS 4.5

 

Three Phase AC Slipring Machine

  • Hz : 50 CONN : Delta
  • SYN. Induction
  • SLIM Motor
  • V (Stator) 415 V AC 415 V AC
  • A (Stator) 1.4 A AC 0.8 A AC
  • EX. V (Stator) 50 V DC 50 V DC
  • EX. A (Stator) 2.0 A DC 2.0 A DC

 

Universal Motor

  • AC DC
  • Volts 230 150

•      AMPS 4.5 3.5

•      RPM 2000 1500

 

Optional Addons

A. PC interface (Optional): needs following additional panels:

1) AC Multi parameter measurement meter (MMM)/Power

Network analyzer/ - 2 nos . (8 shrouded banana sockets)

• These MMM meters replace above since they offer modbus connectivity.

• Modbus RS485 to USB converter needed – 2nos.

 

2) DC Current /Voltage Measurement Expt. Panel / MIT12 : (4 shrouded + 22 banana sockets)

DC current hall sensor (x2nos.): Closed Loop current measurement using Hall sensor IC (max. I/P upto 20A, 50/60Hz), Isolation = 2.1KV, Proportional O/P = 0 - 2.5V, 1 CH. • DC Voltage transducer (x2 nos): Using high speed opto coupler IC (max. up to 600Vdc), isolation = 2 KV, 1 CH.

• Function Blocks Used : Precision rectifier (x 2 nos) with gain = 5, LPF (x2nos) with gain = 2, Span Zero Circuit to interface with ADC(0-2.5Vdc) for both current and voltage, only 1 functional block each supplied, 2nd , Field failure/zero current detector.

• Needs CIP panel to interface with PC USB port.

 

3) Computer Interface panel (CIP) (10 banana sockets)

• Connects to PC USB port using USB IO module through 25 pin D (M) connector on CIP & type A to mini B cable.

• 4 ADC channels I/P: 0 to 2.5V FS with 1no input simulation pot. 1 DAC channel O/P 2.5V FS.

• V to I function block: I/P 0 to 2.5V & O/P 0-20 or 4-20mA (100E load) switch settable.

• I to V function block : I/P 4 to 20mA & O/P 0 - 2.5V

 

4) Software on CD:

• Virtual Workbench package is a USB / serial modbus based software working on windows dot Net platform coupled with USB IO module useful as general purpose utility which supports different control strategies like Single or multi loop PID controllers, Fuzzy controller etc, Graph plotting in XY, XT and polar mode etc, Modbus interface, Data logging, Event trigger, inbuilt Function generator etc.

 

B. Phase Shift Lock Rotor Mechanism [PSLR] :

 

Mounting Method:

I) By mounting PSLR mechanism on C bracket, using 4 nuts & bolts, it can be directly inserted on to the shaft of diameter 19mm of 3Phase AC machine & to screw the C bracket securely to U shaped open slots of chassis.

Block Rotor Test:

II) Above mechanism is mounted on chassis as shown & coupled to 3 phase AC induction squirrel cage motor (0.5HP) to carry out block rotor test. Here the turning wheel or knob of PSLR mechanism has no role to play.

 

C. Ward - Leonard Speed Control Trainer :

  • Consists of 4x2 rack with following panels.

1) Squirrel cage (300W) I.M. 2 speed coupled to 300W trunnion mounted DC integrated M/C (generator)

2) 300W DC shunt M/C (motor) with spring balance loading arrangement.

  • Table Top Machines / Accessaries required :

1) Open loop torque speed characteristics with DC motor.

2) Closed loop speed control / Regulation characteristics using speed

  • Experiments covered :

/ armature voltage feedback using ward leonard as well as p / PI

modes of controller. 3) Transfer function . determination (Optional)

 

NOTE : Can also perform these expts - by adding 1

extra spring balance loading arrangement DC shunt machine

in 8 machine set.

 

D. Paralleling / synchronizing, of two 3 ph. Alternators (Optional).Needs 2 sets of panel with 3 x 2 lamps,

sync switch synchroscope and 2 sets of coupled machine sets. Can parallel with another 3 phase AC integrated machine or 3 ph.

AC mains supply or 3 Ph. AC grid supply. In case of grid parallelling, you will need only one coupled set & above synchronizing test gear panel set.

 

 

E. Transformer Trainer, Single phase Transformer (2 Nos.) + 3 phase transformer (1 No.) with additional measurement panel

, 3 Ph./3A variac.

 

 

Category:
ELECTRICAL ENGINEERING
product Name:
AL-E538C ELECTRICAL MACHINE TRAINER
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