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Dahlender motor

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All about Dahlender Motor, it's connection and application

Published in: Engineering
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Dahlender motor

  1. 1. Dahlander Motors The Dahlander motor is a two speed motor that offers a 1:2 speed switching. It is a specially wound pole switching motor requiring a special dual speed starter. The motor is wound as star or delta with center taps on each leg of the winding. The motor is connected in star or delta for one speed and in "double star" for the other speed. The starter requires three contactors (five for reversing): Speed 1 main contactor Speed 2 main contactor Star contactor that can differ in its connection depending on the motor layout. Two over load protection relays are required, one in series with each of the main contactors. Dahlander motors can be wound for constant power, variable torque or constant torque applications. A constant power Dahlander motor is would as a delta motor, and a constant torque motor is wound as a star. I’ve done the drawings showing reversing starters as this is what I used to work on. HF = High forward HR = High reverse L = Low star LF = Low forward
  2. 2. HF = High forward HR = High reverse H = High star LF = Low forward LR = Low reverse HF = High forward HR = High reverse
  3. 3. H = High star LF = Low forward LR = Low reverse
  4. 4. Application 3 Phase AC Squirrel Cage Induction Motor - Dahlander Type With the availability of 3 Phase AC Squirrel Cage Induction Motor - Dahlander Type becoming common, the use of 3 Phase AC Squirrel cage Motor became very common & today it holds 90% of the total market share. The simplicity in operation with the 3 phase voltages & immediate torque made it a very common motor. Dahlander motor is just an extension with the flexibility that from 1 motor you can get 2 different fixed rpm, this is basically by changing the coil connections inside the motor. This Model is the Industrial /Educational model suitable for demonstrating to students the complete know of the Basics, Components, Starting methods, Wear & Tear & Maintenance of these motors packaged in small rating. Students can make connections of their own with the help of the terminations provided for study of features viz Starting methods, Speed control, Speed -Torque, Effect of Phase angle, Study of Cogging/Crawling, Effects of Single phasing, Effect of voltage imbalance operation, Blocked rotor test. Specifications :  Power ratings available : 350W / 750W / 1KW /2 KW / 3KW/ 5KW  Voltage Input: 440V AC 50hz  RPM: 2pole & 4pole, (1400/2880), other options are (6pole/4pole)  Single / Double shaft extension, TEFC, IP44, IC01, B3, Class-B, S1, Casting body W21 - Cast Iron Frame - Dahlander 4/2 Pole - Constant Torque Premium efficiency cast iron frame IP55 Dahlander two speed 4/2 pole constant torque motor
  5. 5. Applications Pumps- Fans- Crushers- Conveyors- Machine tools- Milling applications- Centrifugal machines- Presses- Elevators- Looms- Grinders- Woodworking- Packaging equipment DSDM-300 Dahlander Motor 300 is a dual speed Dahlander motor with a six lead connected stator-The Model DSDM diagrammed area located on the front ofwinding wired to terminals located within a schematic a terminal panel mounted on a totally enclosed terminal box attached to the machine base. TEFC - Two Speed Dahlander - Variable Torque - One Winding Fans-Pumps-Blowers-Conveyors-Farm equipment-Saws
  6. 6. TWO SPEED DAHLENDER MOTERS MODELS 8223,8224 AND 8225 1) MODEL 8223 : 2)MODEL 8224 :
  7. 7. 3)MODEL 8225
  8. 8. ASWAN UNIVERSITY FACULTY OF ENGINEERING ELECTRICAL ENGINEERING DEPARTMENT engineer: Ahmed Amin Hassan Slides About " Dahlender Motor "

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