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  1. M

    How to calculate the current used by a BLDC motor under load?

    I'm working on a robotics project and currently we are designing a battery. This battery is dedicated to the motor driver and two BLDC motors. I want to know how much current the battery will draw if we drive the robot at a certain speed. More specifically, how to calculate the speed of a BLDC...
  2. Mr305worldwide

    Need help identifying parts on a DC motor

    Hi all I have a small DC motor that I pulled off from an ABS car module and need help identifying some parts in order to hopefully rebuild it. 1. Why does this motor have 3 carbon brushes instead two? 2. Why is there a large spring on the base? 3. Will replacing the carbon brushes with amazon...
  3. A

    How to do a proper insulation test on an electric motor

    I want to check the insulation of the 3-phase 400VAC asynchronous squirrel cage motor. Motor's stator windings are connected in delta. I've read in some textbooks it is necessary to open motor's junction box and disconnect terminals and remove jumper bars (which are used to establish delta or...
  4. T

    AC Single Phase Motor - Expected Amp Draw

    Hi Forum Members I have a 4 pole single phase 240VAC 315 watt motor from a central heating heating system that I think is bad. It's the room fan inside the squirrel cage that sucks / pushes the air past the heat exchanger It seems to run but very slowly. I think it's bad. That said, there is...
  5. A

    90V DC motor connection using receptacle

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

    Replacing septic tank motor

    I need to connect a replacement motor for a septic tank agitator. I've identified that the motor needs to be connected to a 4mf run capacitor but the wiring diagram (attached) looks strange. I was expecting to see one set of windings connected straight to live/neutral and the other set connected...
  7. 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...
  8. Jessey

    Can i use a lawnmower motor for my diy go kart?

    i have a lawnmower motor could i use it to make a diy go-kart and how i am new to enginering
  9. B

    110 V Motor Question

    Hello everyone, I have a piece of 110V plant that is not working. The wire from plug to NVR had a partial cut (rectified). The NVR energises so assumed good. The motor has what looks like two capacitors (white and black). I am trying to run some basic checks on the windings (resistance) but...
  10. CNCman

    Speed control for 230v motor

    I'm a DIY'er. Setting up a dual purpose shop-cooling and overspray fan. Bought this motor which reads "1.5 hp" but, looking at the amps, shouldn't it really be closer to 3hp? Anyway, I'd like to be able to slow it down occasionally because it will knock you off balance to walk in front of it. *...
  11. D

    Hoping to identify the wiring on this 240v Table Saw motor

    Hi Experts, I was given a Ryobi 240v Table Saw which I think came from South Africa. The motor was disconnected when I checked but I would just like to connect up the motor to see if it works. There are four wires to the motor, two black, one grey and one blue. I don't want to blow it up...
  12. H

    How to choose AC motor？

    I need an AC motor with output power of 25w and voltage of 50v. Do you have any suggestions
  13. I

    slow down speed of AC FanCoil blower motor

    hello, i have a central AC Fan Coil with a 3 speed motor within my Condominium. I run the fan of low but find it blows too much air and produces too much noise when i run the AC (the motor works perfectly and doesnt make noise internally, just the rotation and airflow it produces for my samll...
  14. I

    blower motor wiring help

    i had a 3 speed blow motor to an AC fan coil unit. I disconnected the wiring and installed a new unit and forgot how the wiring goes, i no expert and dont want to burn anything out... from my electrical panel to the blower motor, I have a wire that has 120v, another wire has 40v, and a 3rd...
  15. Mr305worldwide

    How to find right size carbon brush for electric motor?

    Hi all. Im looking to replace the carbon brushes on the ABS electric motor in my car that no longer works correctly. Thing is, I don't know how to find the right size and I don't want to remove the motor from the car unless I have the part on hand. I'm looking on Amazon but it seems that there...
  16. Poolworx

    Pool pump motor humming

    Hi all Back in July last year I installed a new pool pump/motor. The problem is it's now making a humming noise and trips the breaker. I initially thought it was the capacitor, but opened up the back to find there is no capacitor. Didi a little research and thought maybe it was a shaded pole...
  17. M

    Is anything special about motor start capacitors?

    My dishwasher was failing, and I quickly found the problem was a failing capacitor on the circulation pump. Marked as 2.5uF 400V. No problem, except not easily found locally. So I rummage around and find an old fluorescent lamp with a power-factor correction capacitor of the right value. Well...
  18. mxj262

    Star Delta Starter 400KW Crane Motor

    Hello Dear friends, I am going to check a start delta starter for a motor(400KW) which is used for crane and lately it has been causing some issues (Voltage Drop) not sure if the voltage drop is always there once this is started or it goes back to normal this information was not provided. Will...
  19. R

    Wiring up a new cooker hood motor

    Hi I am looking for some help. My Rangemaster cooker hood stopped working sometime ago, I’ve stripped the hood down and degreased the hood. Ive diagnosed the problem to be a faulty motor. I’ve bought a replacement motor, like for like, although the new motor has the same coloured wires but is...
  20. C

    I have a 1 HP Dayton motor model 5k673. It is being replaced with 31TR91. Need help with wiring.

    I have a 1 HP Dayton motor model 5k673. It is being replaced with 31TR91. Need help with wiring. I was able to confirm line (L1) abd (L2 230v) Connections, but I have 2 wires left and I am not sure where they go. This is a hangar door, and the wiring is attached to a 3 pole switch...

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