An electrical actuator converting electrical energy into rotational motion.

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1answer
51 views

Regenerative Braking

It is often said that regenerative braking is difficult to implement on a DC series wound Traction motor with brushes .I haven't done this because nobody has asked me to .I would like to see what ...
0
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2answers
50 views
0
votes
1answer
24 views

Correct MOSFET choice for brushed DC motor

I'm looking for a few MOSFETs for a really small motor. This question is exactly what I am asking but I'm afraid this might be marked as a duplicate. Basically, I have really small motors rated more ...
1
vote
3answers
70 views

Voltage drop on motor controlled by arduino via transistor

I am using a transistor (TIP 122) to control a dc motor using arduino. Although the power source I use is measured at 6V, I only get 5V at DC motor(M1) when I use the transistor. Here is the ...
0
votes
1answer
50 views

I need help understanding how this stepper motor circuit works

This is my first time working with stepper motors. The motor in question is a Portescap 55M048D1B (source: http://www.digikey.com/product-detail/en/55M048D1B/403-1016-ND/417823). I am having trouble ...
0
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1answer
27 views

Can I use a stepper motor driver to control a brushed motor?

I'm doing a bit of shopping lately and I pretty much see stepper motor drivers everywhere, although I couldn't find any for brushed DC motors. I attempted to use a 2n2222 but it's probably a bad idea ...
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votes
0answers
15 views

rfid and arduino

I want to ask, I want to create a project using RFID barrier gate. I want the way it works when the RFID is scanned then the bar will be open 90 degrees, and after the vehicle passes through the ...
0
votes
1answer
1k views

stepper motor current rating

I am having 8 wire stepper motor rated as 12V ,0.95A, and torque=1kg cm it has coil resistance 3 to 4 ohms. I have successfully run this motor with help of this forum. Now i have one doubt regarding ...
0
votes
2answers
35 views

Servo Motor set up

I want a servo motor to move/rotate a set distance and hold position (bear weight:which for my uses would be minimal) and then when power isn't applied/cut-off it drives back to original position. I'm ...
1
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1answer
140 views

why 'V' curve of synchronous motor doesn't touch D.C. field current axis?

Why synchronous motor armature current doesn't become zero with field excitation change ? it can be seen from 'V' curve.?
3
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2answers
1k views

Choosing relay to operate water pump

Based on my research so far, I've concluded that a relatively low-cost, yet reasonably reliable way to control operation (on/off) a motorized water pump, is a well spec'd EM-relay with flyback diode. ...
0
votes
1answer
32 views

Varying Voltage across a DC motor

I have a solar panel hooked up to a 12 V battery that it powering a DC motor. What is an easy, efficient way for me to change the voltage across the motor. I would like to include a knob so I can ...
0
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1answer
20 views

Induction Motor Problem

I have an induction motor running hot and slow in the direction it's supposed to but when I change the lead wires so it runs in the opposite direction it runs as it should. Is there any reason as to ...
0
votes
1answer
45 views

12v driver 24v h-bridge

Hi, I want to run a 24v motor with a 12v h-bridge mosfet driver (HIP4081A). I haven't try it in real life but I made the schematic. I want to know before testing it if you can find any error or bad ...
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votes
1answer
45 views

DC motor selection criteria for electric vehicle application?

I read that for DC electric motors you should generally use the motor with the highest "motor size constant" you can (motor size constant Km = Kt^2 / R, where Kt is motor torque constant i.e. N*m/A, ...
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votes
3answers
2k views

Diffrance between Brushed ESC and Brushed DC Motor Driver (Controller)

What is the diffrance between a Brushed ESC (electronic speed controller) and a Brushed DC Motor Driver (controller)? they both do the same job, yet at different prices and look diffrent. Example: ...
0
votes
2answers
47 views

Generating exact frequency of vibration with motors

I measured the frequency of motors with an accelerometer (ADXL335), but the frequency from my measurement is a lot different from the frequency specified in the product page. I tested with two ...
0
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3answers
55 views

Bi-directional DC Motor Controller

I am using small 1 AMP DC motor the speed of which is controlled by a small controller that actually generates a variable V from 3 to 12V. I can change the direction of the motor by using a DPDT ...
1
vote
1answer
49 views

What happens if I reduce the air flow for an exhaust fan?

I'm not very familiar with 220V AC circuits and motors that run on them, so let me explain my question. I'm building a soldering fume extractor for my workbench similar to what is shown in this ...
2
votes
2answers
778 views

Operation of a Growler to test armature shorts

Can someone explain to me how a Growler for testing electric motor armatures works please? I have obviously read the Wikipedia Growler page but it is still foggy. So the growler unit acts as the ...
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votes
0answers
59 views

How to drive a 12V DC motor using a relay? [closed]

Our professor gave us an assignment- to make a circuit that drives a 12V DC motor using a 6V relay. I tried searching the internet, but I can't fully understand it. Can you show me a simple circuit ...
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votes
0answers
49 views

Designing of bearings [closed]

A load of 1000N is being driven by my linear motor. While checking the motor datasheet i found that the magnetic attraction force is coming to be 15kN,almost 15 times. Now the question : Do I have to ...
0
votes
1answer
29 views

Single motor + Timer. Lift and reverse hand. Single joint robot arm

I need help trying to design a single jointed robot arm that will lift to almost flat on a wall, back down to a right angle position on a timed sequence, repeatedly. It would pause for a few seconds ...
0
votes
2answers
51 views

What sized motor could spin ~2lbs?

I am working on a prop for a film -- I have to make a sign spin in a circle (simple attachment to a motor) and have variable speed. I know enough to wire the thing, but am having a hard time getting ...
0
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1answer
54 views

Control DC Motor with Micrcontroller

I would like to use a microcontroller to control when a pump turns on and off. I will use a 12 volt battery to supply both the dc motor for the pump and microcontroller. How can I interface the ...
0
votes
1answer
64 views

3 phase AC motor 220V powered from 12V battery

I need occasionally drive watergate with gear box (e.g. http://www.servomech.com/main/screw-jacks.htm). Because location is far away from 220V I suppose powering from SLA 12V battery charged from ...
0
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2answers
53 views

DC motor - selection

I'm not an electrical engineer . I would like to know whether a normal DC motor will hold the load when the power is turned off?? Or should I need to install a controller to hold the load at that ...
0
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2answers
63 views

what battery(s) do i need to power a 12 amp 200 mph motor for 1 hour?

I have a plug in leaf blower/vacuum and would like to convert it to battery power. here is a link to the equipment in question. ...
1
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1answer
63 views

TVS unidirectional vs bidirectional in Hbridge

I have used this circuit (I found online last year) to drive big dc motors without much thinking but with great success. http://obrazki.elektroda.pl/4961105700_1437649469.jpg : - But yesterday I ...
2
votes
2answers
92 views

Inrush Current Booster

I probably need help more with terminology (and thus, how to find the answer that already exists) than with technology. My current hobby project is a low-power device — max current is 100mA at 5V* — ...
0
votes
1answer
24 views

Timed motor switch

I'm very new with electronics and I'm working on a project, I need to make a motor go forward then after a few seconds reverse, then forward then reverse and so on. I found this tutorial (How to ...
1
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1answer
33 views

dc motor amp draw based on HP and watts

I repair treadmills and occasionally the motor causes the controller to fail. I use a 20v dc source with no load for the test.I have determined thru testing many motors of the same specs that a ...
1
vote
1answer
59 views

Customized Digital Clock(two power sources)

I am quite newbie in electronics. Recently I bought a Digital Alarm clock and tried to customize it by adding DC motor wheels . Idea is to set an alarm , when its alarm time apart from sound it should ...
1
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0answers
29 views

In field controlled dc motor, why does the armature current remain unchanged even if it is affected by field flux?

Basically in a field controlled dc motor, the armature current is kept constant (via some constant voltage source) while the field current is varied which will vary the field flux and interacts with ...
2
votes
2answers
70 views

Estimating power usage of idle motor

I would like to calculate the power usage of an idle motor. The motor drives state a power usage of approx 8-10% of full load. Would it simply be the case of taking 8-10% of the motor's power rating ...
0
votes
3answers
88 views

How to amplify voltage using op-amp

I want to measure a motor's load by it's current draw using Arduino, so I made this diagram: The Motor is controlled by a L298 H-bridge. My questions are : The motor's rotation can be reversed, ...
1
vote
1answer
27 views

The Hall sensor in a BLDC - winding magnetic field interference?

I am wondering what is the impact of the magnetic field generated by the BLDC windings being energized on the rotor position measurements with the Hall sensor. I found some unclear explains stating ...
0
votes
0answers
28 views

Measuring the frequency of motor vibration

I'm using a motor from Adafruit. (Product page link: https://www.adafruit.com/product/1201) I measured the frequency of vibration with different voltages, but the frequencies are quite different from ...
21
votes
6answers
40k views

How to drive brushless motor with Arduino?

Is it possible to drive a brushless motor directly with Arduino? Or should I revert on controlling a brushless motor ESC with PWM pulses?
0
votes
2answers
174 views

What factors can determine the constant coefficient when calculating torque?

In this servo motor's datasheet, both motor have the same torque of 0.32 Nm, have the same power of 100w, but have different rated currents and voltages. It seems that the "torque" relates to the ...
2
votes
2answers
96 views

Making a robot go straight using encoder motors and micro-controller (Arduino)

Now I have a simple chassis with two wheels which are powered by encoder motors. I connected Arduino Uno with the chassis and made a simple program to just count the numbers of signals (in simple ...
0
votes
1answer
43 views

controlling Stepper motor with a push button for high load

Can we have a stepper motor which moves one step when we press a push button,then the next step when we push the button 2nd time and so on? If possible what all components i require and the circuit ...
0
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2answers
126 views

Need help to vibrate a motor for an original musical instrument

everyone. I am asking you to help me out for making original musical instrument. The goal is to vibrate a small motor by square wave signal witch is generated in a synthesizers in my Mac. Here is ...
1
vote
2answers
46 views

Frequency of motor vibration with different voltage

I'm using a motor shown in the link below. http://www.adafruit.com/product/1201 The product page is not showing the detail of how the frequency of vibration changes with different voltages. I sent ...
5
votes
2answers
173 views

converting induction motor winding to reluctance motor winding

I want to build simple reluctance motor for education purpose. I have couple of small 3 Phase AC Induction motor with 24 slot stator lap winded for 4 pole design. I want to convert it to reluctance ...
1
vote
1answer
57 views

Circuitry for the DRV8840 Motor Driver

I'm building a circuit based on the DRV8840 (datasheet: http://www.ti.com/lit/ds/symlink/drv8840.pdf). Unfortunately, I can't get it to work. I think something might be wrong with my design. When I ...
8
votes
4answers
7k views

Explanation for Differing Stator Winding Orientations

As a layperson, I'm trying to understand the basic configuration for an induction motor or generator. I've looked at many diagrams and photos/cutaways of stator wiring and I've noticed two different ...
-3
votes
1answer
65 views

Six Wire Servo with Arduino

I have a Tamagawa 200 step servo, 6.4V. I want to test it with my Arduino Uno. My only problem is that it has 6 wires (white, red, black, green, blue and yellow) and I can not find a simple way to ...
1
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3answers
73 views

'center bore' motor?

What I mean by this is a motor with a large hole in the middle, instead of a shaft. Some motors I found allow to easily remove the shaft, but the bore/shaft diameter I need (at least 4 cm) and RPM ...
0
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1answer
90 views

What does 'L' mean in the name of motor driver IC “L293D”?

i was wondering what the letter L in the name L293D stand for and what does it mean.