An electrical actuator converting electrical energy into rotational motion.

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5
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2answers
5k views

How to tell whether a motor is an AC or DC motor?

I watched a youtube video http://www.youtube.com/watch?v=hT3jJRGVdW4 The man says : by spinning the motor to see whether the output is AC or DC, then it can tell whether the motor is generating AC or ...
0
votes
2answers
39 views

Micron-Scale Linear Actuation

I don't know a lot about linear actuation, but I need a precise device that I can control easily (using some kind of hobby board) that is able to perform linear positioning with a resolution of at ...
0
votes
1answer
16 views

what type of modification can i use in my MCU in conjunction with my SSC32?

Hello there guys im looking for a way to connect and use a DC motor with a Servo controller such as the SSC32? now given the fact that a Servo controller or driver has 3 pins, PWR GND SIG/PULSE now ...
0
votes
2answers
47 views

Converting a DC motor to a generator

Can ANY DC motor become a generator if torque is applied to the shaft? example: http://www.wikihow.com/Produce-Electricity-from-a-DC-Motor And by any, I mean the really cheap ones too. Or is there a ...
0
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0answers
32 views

Technics SL DL5 Turntable Motor

I have just salveged a SFDPC05N01 motor form a Technics SL-DL5 Turntable. I would like to use it for something else. (It's still gonna be a turntable, for videos) My question is how to get this up ...
1
vote
1answer
56 views

Significantly reducing speed of single-phase AC motor

I have a 1/3hp single-phase AC motor spinning my drill press. With the maximum reductions available through pulleys it still runs 10x too fast for one of my applications (i.e., the chuck turns at ...
0
votes
0answers
30 views

Can a ceiling fan's speed be controlled with a light dimmer switch [migrated]

I purchased a ceiling fan a while back which is one of those fancy ones that is operated with a remote control. However, for some reason, the remote broke, and the fan is stuck on maximum speed, I can ...
0
votes
2answers
32 views

BLDC motor/PMSM parameters at reduced operating voltage

I was thinking about nameplate parameters of BLDC motors/PMSM and wondered what happens to those values if I operate the motor at a lower voltage as rated. Are my following conclusions correct? If ...
0
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1answer
35 views

Ramps 1.4 stepper motor Slaving

So I am looking to run 2 stepper motors for x and y axis with a ramps 1.4 board, but since their are only one stepper motor driver per axis i was wondering how to accomplish this? (I'm thinking a ...
0
votes
1answer
29 views

Choosing Stepper Motor - Driver Combination

This is my first attempt at designing/building my own circuit and PCB, so please bear with me. I am building a small, portable device that makes use of a small, accurate motor. My goal is to make the ...
1
vote
3answers
183 views

Why alternators are used to generate DC?

Why is it that to generate DC, it's often an alternator that's used? Couldn't commutator rings be added and do without AC-DC conversion? I'm asking because I wonder how efficient it usually is for a ...
1
vote
2answers
496 views

Is my MOSFET H-bridge design correct?

Can anyone check over this motor controller design I made? I'm running off of a rudimentary understanding of electronics (just a hobbyist), so I'm not fully confident in it yet. Kamil EDIT: ...
1
vote
4answers
3k views

Is Power consumed by a motor under various load conditions constant?

Does a motor (dc /Induction/Synchronous ) consumes more power when operating at higher load than when operating at some lower load? Or power consumption remains constant/same in both cases? What I ...
1
vote
1answer
62 views

Strange electrical noise from stepper motor

It's my first project using arduino. Simply trying to rotate three identical stepper motors, using three 293d h-bridges. Although it does work properly (meaning the motors do rotate as they should), ...
2
votes
4answers
94 views

Do I need a galvanically isolated step-down DC-DC converter to power my digital electronic from a battery pack that powers also the electrical motor?

I have a battery pack with lithium ion cells. The battery pack has a maximal voltage of 84V (it goes from 84V to ~50V -> depending about the current state of charge). I use this battery pack to ...
0
votes
1answer
54 views

H-Bridge driver circuit design

I have built the following H-bridge driver circuit (The red resistors R9 and R10 were not included). However during testing I have found that I am constantly blowing the high side P-Channel MOSFETS ...
-1
votes
1answer
41 views

calculate encoder period from motor rpm?

Let's say I have a stepper motor which rotate at a speed of 1000 RPM and I have an incremental encoder attached directly to the shaft with 4096 PPR (pulses per revolution). How I can measure the ...
0
votes
1answer
33 views

Sizing a motor starter

That is the motor. Looks like the old version of a new Baldor M3558 2HP 3phase motor. I plan to run a 230v 3phase line to the motor, but I need a starter. This starter on Grainger looks ...
0
votes
3answers
68 views

DC Motor consuming too much current

I'm trying to use an H-bridge, which is connected to a wall power supply, to power a DC motor. The motor was originally powered by a 12V battery pack in a toy. Now my motor is consuming too much ...
24
votes
1answer
21k views

How can I implement regenerative braking of a DC motor?

I know that many electric cars are able to convert the momentum of the car into stored energy in batteries, rather than convert it to useless heat at the brake pads. How does this work? How can I ...
0
votes
3answers
95 views

Is resisting DC motor bad for it?

If I keep the shaft of a DC motor in place while it is running does this harm it in any way? Is it bad for it at all?
0
votes
1answer
48 views

wattage consumption of three phase electric motor

i have a 5 hp motor in my factory . at load, it shows 3.5 ampere consumption ( when tested by a meter). is the consumption accurate? someone told me that 5 hp three phase motor will consume 7.5 ...
0
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0answers
46 views

Choosing a DC Electrical Motor for Linear Movement [migrated]

I would like some help defining the specification of my motor, as I have little experience in this field. I've tried researching through Google, but the information is insufficient or unrelated. The ...
-1
votes
1answer
42 views

Motor pump slowed down due to suction blockage

I have a 1 HP, 220V motor pump which was working fine till recently. Last day, some dirt and dried leaves got into the foot valve and blocked the suction pipe. I ran the pump for sometime in that ...
0
votes
0answers
11 views

Driving LRA actuator with a driver

I'm using a driver DRV2605L to drive a LRA from the link below. https://catalog.precisionmicrodrives.com/order-parts/product/c10-100-10mm-linear-resonant-actuator-4mm-type The problem is that the ...
0
votes
3answers
53 views

Can I run a liquid-pump motor below its specified operating voltage range?

The liquid-pump/motor is a miniature one from ebay with its operating voltage rated as "6-12V". Even at 6V (the minimum of that specified range), it's pumping liquid too fast for my requirement. ...
0
votes
0answers
14 views

Transistor slows motor instead of turning it off [migrated]

I'm new to electrical engineering and am currently trying to make a motor turn on for one second, turn off for one second, and repeat. I'm using an Arduino Uno's digitalWrite feature to activate a ...
1
vote
1answer
58 views

Can I use any capacitor for a 2 phase AC motor?

So recently I got my hands on an old pump motor, unfortunately the connection diagram is missing. I have already determined this is a 2 phase motor, and that in order to make it work I need a ...
3
votes
5answers
37k views

Torque kgcm (what is kgcm)?

I know what torque is but I find difficult to understand what Torque: 3kgcm means ? I am not sure, how much weight that motor can carry, and I want to know how I can calculate that. Please give me ...
-2
votes
1answer
46 views

In DC motor'name plate there is written only 12 or 24 volt there is no any description about current and power why?

In DC motor'name plate there is written only 12 or 24 volt there is no any description about current and power why?and in ac motore there is written all details about voltage and current and power.
0
votes
3answers
43 views

Generate Power off of several motors at once

So in working on a project, I am considering generating power using several small 12V motors (made for DIY toy cars, very cheap on amazon) or by using one bigger electric scooter motor (24V, 250W, ...
1
vote
1answer
54 views

How do I change rotation direction of single phase fan motor?

I have a single phase AC motor. I found it from Photocopy machine. That motor same to Fan motor. It has a capacitor to make phase angle. I don't know what is the correct name of my motor. Can I ...
-1
votes
1answer
25 views

relay rating 28vdc VS 12vdc [closed]

I am looking at a relay with a 10 amp @28VDC rating , what AMPS would it be capable of @ 12 VDC? thanks guys.Searched the net and cant find an answer i can make heads or tails of
0
votes
1answer
67 views

Share battery pack with Arduino and DC motors

I used 6 rechargeable AA batteries (total 7.2V) to power my Arduino (UNO R3) Car's two DC Motors (using L293D IC as motor driver). I used separate 9V battery to power Arduino itself. But I want to ...
0
votes
0answers
67 views

How to control a (different) brushless motor

Note: I will be updating this post with detailed images and measurements later. Someone gave me a brushless motor made by Maxon Motor and I have no idea how to control it. The only information they ...
0
votes
3answers
64 views

Little confusion about dc motors

So for whatever reason I'm having a little bit of a problem understanding why every dc motor explanation says the current switches after every segment in the armature. I mean the current is going to ...
-2
votes
3answers
73 views

Which motor would work best as a generator? [closed]

i've been doing a lot of research into motors to use as a generator in a medium sized wind turbine project. I am lost as to what to do, will a large AC motor with a bridge rectifier be a good ...
0
votes
2answers
39 views

Using a Servo motor as load on a system

Can a Servo motor (or any electric motor) be used as a load on a system ? meaning can it reprisent for example a certain dead weight ? In the picture below you can see a motor driving 3 gears, to ...
5
votes
3answers
26k views

Understanding motor constants Kt and Kemf for comparing brushless DC motors

So for a practical definition, the torque constant Kt specifies how many Nm of torque you'll get from the motor at a certain current? Is a bigger Kt always better? I am more confused about the ...
0
votes
2answers
45 views

Burning Temperature of Copper Winding of Motor

Burning Temperature of Copper Winding of Motor. I Have 3 motors 150watt 0.75Amp 220V in Copper and Aluminum and Copper clad aluminum. I want to know the maximum internal temperature of these motors ...
-1
votes
2answers
144 views

Modifying a thermostatic radiator valve for micro control

The photo below shows a electrical thermostat controller. The upper part is the motor with a gear. The motor has two wires attached. A red and a black one for the current. What this component does ...
0
votes
3answers
76 views

Control DC MOTOR from headphone

I would to know if is possible with simply way ( i'm not electronic expert ) to drive one direction a DC MOTOR ( a little ) from headphone, with power supply of course. The difficulty is voltage of ...
1
vote
4answers
3k views

How to change rotation direction of 3-phase electrical machines?

I was taught that if you want to change the direction of a three phase rotating machine that is rotating in forward direction, you interchange the phases. Since the phases has the same features ...
0
votes
0answers
23 views

How do I calculate the number of turns per slot on a stator?

I am in the process of winding a split phase permanent capacitor motor running 1/3 at ~1720 RPM 120V 60Hz. It features 4 poles and 24 slots on the stator. The motor had 18 AWG magnet wire. I am ...
0
votes
5answers
126 views

Driving a DC Motor without diodes

As you know, H-bridge circuits are used in order to control DC motors. Switches S1-S4 are closed to turn the motor in one direction, S2-S3 are closed for another. But at the time of changing motor ...
1
vote
1answer
64 views

Metal sleeve around cassette player motors?

I have recently taken apart a few cassette players to get motors, and I have noticed there is always a metal sleeve around the main drive motor. Here is an Ebay product photo showing this on a ...
0
votes
1answer
48 views

How to generate constant movement given variable opposing resistance?

I need to generate constant movement in one direction given a variable opposing force even while "stalled" (no net movement in either direction) and when the opposing force is greater than the force ...
0
votes
2answers
65 views

Location of capacitor in 120V circuit [duplicate]

In a 120V AC motor circuit, a capacitor is wired in series with the start/auxillary winding. I'm a beginner, but I think I have learned that the cap's function is to create a phase shift to enable ...
0
votes
2answers
75 views

Arduino hacked rc car, H bridge, logic voltage overwhelmed

I have hacked my old rc car like in this tutorial here I have measured manually the h bridge logic voltage (the voltage that the transceiver send to the h bridge) , which is 3.7volt in the ...
0
votes
2answers
40 views

Hooking up a variable frequency drive

I have a 3-phase blower motor that I am looking to control from a Danfoss VLT 2800 that I purchased on eBay. I am going through the manual and I see this table for the mains connection: . I have in ...