dc motor

dc motor

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  1. D

    How to measure DC motor field winding resistance?

    Hello, I need to understand whether a DC motor is sturdy or not. The support person told me to measure the armature and field winding resistance. How to measure DC motor field winding resistance? Would you help me with this topic ? I measure the armature connections between both windings as...
  2. Poolworx

    DC motor overload protection

    Hi all I just picked up an older 36 volt golf cart The speed controller is a curtis 36volt 350 amp I was wondering is there a way of protecting the controller if the motor went bad Thanks in advance
  3. A

    90V DC motor connection using receptacle

    My boss asked me connect 90V DC motor by receptacle. What’s receptacle can I use?
  4. L

    DPDT switch burnt while off

    Hello, I wired a DPDT switch to my sunroof 12v DC motor. It was working ok and I was able to reverse the polarity of the motor to open and close the sunroof. However days later it started to burn when off, even though I hooked up a 20A fuse before the switch. I don't know if it's a short circuit...
  5. Mark W

    Vintage BrookHirst DC motor starters.

    We are in the process of restoring 4 of a group of 5 Brookhirst DC motor starters from 1936. These are a thing of beauty and the engineering in terms of interlocking and ratchet control is incredible. These are all from the same pumping station that controlled well pumps and booster pumps...
  6. B

    Scooter Dc motor windings

    I have a 24 volt 350 watt scooter motor that need rewound. The specs say 3000 rpm no load. Does anyone know how many turns are on each coil?
  7. D

    Siemens Reversing the direction of rotation of the DC motor

    Hello everyone. I have 1 Siemens "1GG6164-0JH40-6VV5-Z" Model DC Motor. It works in 2 phases. What should I do to reverse the rotation direction of this motor? I have marked the B1 and B2 Terminals in the Photo below. B1 and B2 are phase ends.
  8. G

    Dc tacho fail dc motor

    Sirs, Am facing problem in dc drive that is dc tacho fault . I have checked tacho and found values of armature resistance are same in all segments in commutator. But motor speed not in control. It is automatically varying and suddenly stopped. Is there any bypass method available for tacho...
  9. S

    UK 12v dc motor forward reverse off switch

    Hi all, had a job with a swimming pool bubble cover that rolls onto a spool with a small 12v dc motor, it had a reverse key switch to roll and unroll the cover which has had a load of water in and got corroded and stopped working. Thought I'd taken a picture of the switch when there but I havnt...
  10. D

    AC to DC motor thyristors speed and direction control

    So i have been given this question: You have also been asked to produce a circuit design that can control the speed and direction of a conveyor with a AC to DC motor thyristor system. What are the the operational features (how it works with speed and direction circuit diagram/s) I am really...
  11. M

    Does the brushed DC motor and Permanent magnet Dc motor need position feedback in the control system

    Hello guys. I am an electrical electronics engineering student. I have two questions. if you answer my questions ı'll be happy. Thank you from now. Does the brushed DC motor need position feedback in the control system? why? Does the permanent magnet dc motor need position feedback in the...
  12. M

    DC motor and drive problem

    hi to all :waving:, am new in the forum i have a problem with a dc drive let me start with the application it's a centrifugal force pump runs with a dc motor without a gearbox , the operation speed is 1300 rpm working 24/7 the problem is the speed drops from 1300 rpm to 200 rpm instantaneous...
  13. C

    overcurrent in dc motor

    Hi ,first time posting looking for advice on a current problem we have with a rail mounted gantry crane. 2 long travel motors ( 40hp ) were found to be beyond repair recently..we changed both and carried out a stall test ...i found the current values exceed far beyond normal working and this...
  14. P

    Running DC motor from AC grid?

    Hi Im a hobbyist woodworker. I came across the following big old industrial bandsaw. I might buy it if I can get it cheap. Huutokaupat.com - 04.10. - 28.10. Ulosmitattu Bullmer vannesaha - Utmätt bandsåg Bullmer, Vaasa - Kohde 53245 (Its been used in the textile industry. I believe I could...
  15. H

    AC & DC Motor Theory

    Thought it was about time I started contributing. Thanks again to all involved for setting this area of the forum up. Now, I'm acutely aware that this area of study represents something of a weak point for a lot of students. And a few practitioners, I'm certain. Like showing a dog a card trick...
  16. A

    Battery Charger from DC Motor

    Ive got a 24Vdc motor on my wind turbine and Im trying to use it to charge 2 sealed batteries 12Volt in series. Ive been searching the web for days for a circuit/product to regulate and charge the batteries but cant find anything. Can any one help?
  17. D

    Running a 24V DC Motor from a capacitor

    I don't have much exp with capacitors and I wish to run a 24V DC motor (2,82W) from a capacitor for a short period ~2 seconds. The situation is when a switch is made i need the motor to run, it will start but then the switch returns instantly to off position and I need the motor to run on a...
  18. sibbits

    dc motor winding test

    i have a possible issue with a dc motor i can only get to the 2 inputs and not to the phisical windings they dont have any shorts to earth and have good continuity readings are there any other tests that i can carry out without taking the motor to bits??
  19. M

    DC motor runaway

    Hello! Does anybody know what happens to a series- or shunt DC motor if it is intentionally exposed to a runaway? I know the motor overspeeds, but how does it stop? Does the winding insulation burn up pretty fast (and making it stop) or is it possible that the speed on the rotor can increase...
  20. B

    Disable All-Terrain buggy, DC motor selection

    I am involved in a university project to design and produce an all terrain wheel chair. I have been charged with selecting drive motors but as a mechanical engineer i am unsure where to start. I have done some basic calculations to determine forces and power required however my results do not...

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