motor

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  1. S

    125 HP motor speed problem

    We have a 125 HP motor. After rewinding, it runs at low speed at full load, but runs at rated RPM at no load. Any ideas why?
  2. W

    Single phase motor reverse rotation

    Brook Crompton Parkinson single phase PD90S (from the 70s) 240v 11A 2850rpm 50hz I'm using it for polishing metal with a tapered spindle adapter and buffing wheels. I've got 2 questions. 1. (This photo was taken with all the wiring in its original position.) I've managed to...
  3. James

    help with motor

    anyone able to help me with this motor? its a dc motor with forced vent. i am trying to find a suitable motor drive for it but the nameplate is confusing me. anyone fancy deciphering it for me?
  4. F

    3 phase motor dropping voltage with load.

    I have a 10 HP -230 volt 3 phase hydraulic press brake. I just installed a new 40 HP rotary converter panel with used WEG motor. The problem i am having is the volts going into the press during a load is dropping from 245 to 195-200 volt. Which means i'm loosing power of the hydraulic system...
  5. D

    Single phase 240v motor starter & overload with on/off switch wiring?

    Hi, Hoping you all can help me wire up my single phase 240v induction motor. Can someone please explain or even better sketch out where the wires need to go, I have a fair idea already just want some good advice before I continue. Switch is CK-5 10A 250v - SWITCH Thanks in advance!
  6. edexlab

    Motor VSD problem

    Evening all Had a problem this week which has puzzled me a bit Installed a machine last week which has 2 sides to it both doing the same operation It ran perfectly for 19 hrs and then one side stopped working I was away from the site and the maintenance guy called me so I got him to open the...
  7. Pete999

    AM2 DOL Motor

    Trying to get my head around something for a youngster I know about to study for AM2. Someone mentioned that one of the faults has something to do with the Motor running in the wrong direction and what is the way to reverse the rotation, I take it that the Motor is 3 phase am I correct? Not done...
  8. A

    Big motor heating problem

    Hi guys I have a big problem with 3-phase induction motor in star connection The motor power is 3-hp When the motor is starting periodically (many times per minute) it is over heating after 10 minutes from start of working. If the motor is in continuous operation it doesn't heat but if it...
  9. V

    Series parallel motor starter with auto off proximity sensor

    Hi All A while ago a customer asked us to move a 1970s single phase corn mill and return it to use. It had an old series parallel starter with a lever on it ..which we replaced with a crompton controls series 3000 starter...all good and running. Now they had another ip rated box attached to...
  10. dlt27

    Motor starter help.

    Hi all, thanks again for any input. I have been asked to look at this starter as motor starts ok, but when switches over to run motor stops and starter just hums. First of all like I’ve said in previous posts I haven’t had a lot of experience with motors/ starters etc Am I right in thinking this...
  11. happysteve

    Brushless motor battery drills - unsatisfactory speed control, or just this model?

    Have had a Makita BHP458 (non-brushless) hammer drill for years, I love it, it's pretty indestructable and the torque's great, but the chuck's finally going. They seem to be moving to brushless motors now (for most of their combi drills). I've only recently bought a battery SDS drill (after 2...
  12. H

    Can i use a Reed switch to detect if my motor is spinning?

    Hey Everyone. Im designing a product that has an analog electrical system in which i have multiple fans. im thinking of using a Reed switch to let me know if my Fans are working. My thought was that when a motor is spinning, it is creating a magnetic field that would close my reed switch. if...
  13. B

    I have a motor supplied by 2 hot legs from 3 phase 480v. One line to motor is interrupted by a pressure switch.

    I have a motor supplied by 2 hot legs from 3 phase 480v. One line to motor is interrupted by a pressure switch. With one line to the motor hot at all times. Why does the motor not burn up?
  14. T

    Help me with inverter vfd to 3 phase motor

    Ac power supply 440V Inverter - Input 380-480V 50/60hz 11.2A Output 0-480V 8.5A 6.8kva 3.7Kw 3 phase motor- 2.2kW 50Hz Should i use delta or star connection? newguytoelectricity
  15. J

    DIY Pump motor repair

    On this pump motor the yellow wire (next to the 3) broke off. I am unfamiliar with the connection. Do I need a special tool to reattach this (after I strip the wire)
  16. M

    Single phase induction motor schematic

    Hello, I've found an old motor originally designed for operating jealousies. Could you help me read and better understand the following schematic? As far as I understand, it is a single phase induction motor, there is 47 uF capacitor connected to it in order to start. There are 3 contacts...
  17. J

    Which controller for this brushless motor

    I am starting to get into brushless motors but am still having a hard time understanding all of the terms. I am reading books on electric motors and wiring but still need some additional clarification. I am purchasing this brushless motor: Amazon.com: DYS D3548 1100KV Brushless Motor Outrunner...
  18. M

    Setting Motor Overload

    Hi, How do you set a motor overload? I have read that you set it at the FLA of the motor but also that you should consider service factor. Which is correct? Thanks.
  19. M

    Need help with Reversible Motor

    Hi, I am building a motorized easel for large format paintings that do not exceed 100 lbs; average probably more like 50 lbs max. My rough 3D diagram does not show the motor or pullies, etc, but I hope you can get an idea of where these things would go. Motor mounts on the bottom. Cables will...
  20. N

    Siemens RCCB trips even while inductive motor is off

    Good day everyone This is my first thread here, and I'm writing because I have a problem which I'm not sure how to solve. Since its company money, I just want to make sure that the conclusion to the problem is correct. We have an autoclave that works at 121 celsius to sterilize with steam. Its...
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