An electrical actuator converting electrical energy into rotational motion.

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2answers
43 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 ...
1
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1answer
44 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 ...
0
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3answers
50 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 ...
-2
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0answers
47 views

Designing of bearings [on hold]

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 ...
-3
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0answers
57 views

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

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 ...
0
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2answers
50 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
52 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
57 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 ...
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1answer
28 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
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2answers
52 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
vote
1answer
30 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 ...
0
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1answer
22 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 ...
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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 ...
0
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3answers
85 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
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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 ...
2
votes
2answers
94 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
41 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 ...
1
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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 ...
0
votes
1answer
88 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.
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0answers
17 views

Interfacing with Series Elastic Actuators using Simulink

I'm in a newly founded student team where we are building an exoskeleton to let paraplegic people walk again. As the technical manager I am tasked to analyse the feasibility of tech which allows us 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 ...
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3answers
62 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 ...
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1answer
63 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 ...
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votes
2answers
59 views

Starting current of an induction motor

How to calculate the Starting current of an induction motor if I have the power in kilo watts and the voltage? I have looked up formulas , but I got confused. I calculated the full load current by ...
1
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0answers
26 views

AC relay switch-off optimum phase?

I have a circuit which turns a 230V 50hz AC motor on and off by use of a relay. I've tried to arrange it so that the relay would be turned off when the current through the motor is zero. Of course, ...
0
votes
1answer
27 views

have a motor actuator md120-01-l2-416-091 Input DC18-35V 5A MAX want to increase speed, what do I need to use to accomplish this [closed]

Motor actuator DC18-35v +-5A Max, what is best way to increase speed, is used in a chair
1
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1answer
42 views

Circuit for controlling 3 DC motors

I have a simple 3 motor robot arm. Without much experience or knowledge, I put together a circuit for controlling it. Circuit is below: Now the circuit actually works and I can program the Arduino ...
0
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0answers
31 views

1 phase induction motor used for pumping of water to syntax

If 1 phase induction motor which is used for pumping of water, is taken the air, means.. I wil run this without water, but after water is there, but it won't work at all.. Means it takes air, how to ...
1
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3answers
87 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
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3answers
41 views

Regulating D.C. motor - Feedback

I purchase the following hobbyist motor: http://www.digikey.ca/product-detail/en/PKN12EB105C1/P14353-ND/2417077 How can I get a feedback from this motor? The design of D.C. motor that I found on ...
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3answers
80 views

What's the easy way to measure a DC hobby motor's inductance?

When using simulations(SPICE), I need to model a DC motor or an electromagnet, relay ect. as an RL in series. I can measure the R resistance by an ohmmeter. But I couldn't find an easy way to find ...
1
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0answers
77 views

Monster moto shield + Arduino +Pololu 12V, 29:1 Gear Motor Encoder hardware problem

Overflow enthusiasts! I am trying to build a balancing robot with two wheels, using the polulu gear motor as mentioned above. In order to have a strong motor driver,the monster moto shield is used in ...
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2answers
32 views

Motor acting as a generator with backfeed

12v DC automotive question. I replaced the engine-driven clutch fan with an electric radiator fan, controlled by thermostat and relay. I included an LED in the vehicle to show when the fan is ON. ...
0
votes
0answers
43 views

Circuit board dead if motor disconnected

I have a question about this configuration. I am using a motor with the garage door opener circuit board. I want to remove the motor yet still have the circuit board functioning. If I unplug the ...
1
vote
1answer
44 views

voltage mode vs current mode motor

I wanted to ask question regarding voltage vs current mode for a feedback control motor . Will operating in current mode have any effect on our torque values provided that we are keeping the speed ...
-5
votes
1answer
48 views

AC Motor slowing down then returning normal speed [closed]

We have a 3 phase motor controlled by a variable-speed drive. The problem is the motor will suddenly slow down then return to normal speed. What could be the problem? Also note that the slowing down ...
1
vote
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 ...
0
votes
1answer
23 views

Bldc motor driver compability

I looking for a drive for my sensorless bldc motor for a project of mine. 1)Will I be able to drive my motor with ESC(electronic speed controllers) used to RC hobbyist powered by Smps. 2)what are ...
1
vote
0answers
59 views

Draw relation of rotation speed and output power of PMAC generator with brake resistor

I would like to draw a graph showing the relationship between rotation speed and power of an ideal Sinus PMAC generator with a brake resistor R(load) to be defined controlled via a 4Q Controller ...
2
votes
1answer
40 views

Relay control of AC motors, handling turn-off kickback

I've been researching how to control a smallish AC-motor using a relay, and more specifically, how to turn an AC motor off using a relay. This is a subject that has been up many times at this site, ...
1
vote
1answer
41 views

Bidirectional control of two different actuators

I have two actuators, part of two different mechanisms: A cheap brushed DC motor with gearbox coupled to 2 limit switches A Firgelli L16 linear actuator with protective limit switches (not ...
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 ...
-6
votes
1answer
54 views

running motors from ownely coupled generator [closed]

i want to do the experiment on motor generator my design is iamgoing to connect a 2 dc motors and 2 dc generators in that 1st dc motor and 1st dc generator is coupled 1st dc motor and 2nd dc motor are ...
0
votes
1answer
42 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, ...
1
vote
1answer
51 views

Help with coreless micromotor. Can I add a switch?

I have ordered some coreless micromotors, as shown here. These are for a science club for the kids to tinker around with. We are simply using them to make lightweight cardboard junk robots jiggle ...
0
votes
1answer
99 views

Using Logic Gates to Power a Motor

I want to design a circuit that powers a motor on under certain criteria, and off under other criteria. I built my circuit using switches and a 74ls04 (Inverter) and a 74ls08 (AND) gates. The ...
0
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0answers
36 views

Regenerative braking torque ca[ability

I have been trying to calculate the maximum torque that be applied to my driveline through regenerative braking on my DC motor, using the equations from this paper: ...
-4
votes
1answer
33 views

how does a flux reversal motor operate??

flux reversal motor has 2 sets of magnet in a pole that can conduct in the cycle first magnet,both magnets, second magnet.how is the excitation made possible.Note that both the magnets are in the same ...