An electrical actuator converting electrical energy into rotational motion.

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-1
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1answer
13 views

LMD18245T ic for dc motor driver module…?

LMD18245T IC for controlling dc motor how make a simple dc driver circuit using LMD18245T ic for dc motor driver module....? i have rough pic details circuit ......please give me a detail diagram of ...
0
votes
0answers
22 views

Where can i buy 1-5hp pmsm? [on hold]

i want to buy a pmsm (permanent magenet synchronous motor) of rating around 1 - 5 hp, with 4pole, IPM ( Interior permanent magnet type rotor). The motor should be self starting (ie., it must have ...
0
votes
0answers
44 views

Automatic motor with timer (for feeding fish)

I m new to electronics basically i m a computer guy. I love to have my pet(fishes). But problem arise when i m going out of station. I need the connection and appliances for making automatic fish ...
0
votes
1answer
44 views

How do I supply power to two 18v 2.4 amp motors?

I have two of these motors: http://www.radioshack.com/radioshack-super-speed-9-18vdc-hobby-motor/2730256.html#q=motor&start=6&tab=tab1 According to Radioshack's specs (which may be off, not ...
1
vote
1answer
46 views

Resistance and Inductance of a ceiling fan motor needed to spec snubber

I'm looking to specify (well, suggest) a RC snubber network for someone over on diy.se who is having EMI problems with his ceiling fan knocking out his TV briefly on turn-off: ...
-1
votes
0answers
25 views

What is currency counting machine which can read values called? [closed]

What is a machine called in market which can not just count no of notes but actually differentiate between types of notes i.e their values e.g. adding total to sum by their value. Example: consider a ...
-1
votes
2answers
62 views

Motor required for lifting and lowering an awning bar

I believe Electrical Engineering is the best place to ask this question since it concerns engineering and electrical components. I am trying to design a simple system (like a mini garage) that ...
0
votes
3answers
52 views

Reversing polarity of motor with timer

I have a timer that allows me to preset times and run a motor for a predetermined amount of seconds. I need this to reverse polarity as soon as this predetermined time has expired. The timer is a ...
0
votes
1answer
61 views

DC- DC converters

Is it possible to get a DC DC converter which the output voltage varies proportionally to the input voltage? ie 14V in 28V out, 13.4V in 26.8V out. To add some context I wish to charge a 24V battery ...
1
vote
1answer
76 views

What happens if we run 415V 3 phase motor running on full load on to a 240V 3 phase supply?

I have a 415V 3 phase motor, but during emergency situation a 110V DC to 220VAC 3 Phase inverter comes into place. What will be the effects on the motor
0
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2answers
67 views

Washing Machine Motor [closed]

How does a washing machine motor changes its direction after one cycle? I have the basic idea that a switch has to do something with it but want to know what exactly happens and how.
0
votes
1answer
46 views

Fan Control using Motor Driver, looking for suitable solutions

I want to control the speed of a fan (which is a 2-phase brushless DC motor). I am currently using a suitable power supply to run the fans. My source is a Data Acquisition device that outputs up to ...
0
votes
1answer
33 views

Shaded Pole motor - change RPM by relative change to windings

I've got a small shaded pole motor (C-type) that I'm cannibalizing for use in a project, but the current RPM is too high. I don't want to spend the effort to build a micro-controller to run it. Is ...
0
votes
1answer
32 views

How Number of commutator segments,air gap between the segments of brush dc motor affect on performance of DC motor..?

plese help me about how Number of commutator segments,air gap between the commutator segments of brush dc motor affect on performance of DC motor..?? now if we we change the number of commutator ...
0
votes
0answers
59 views

DC Vibration motor issues

I have a simple DC (toy) motor which I'd like to use as a vibration motor for my project. The motor is controlled with an Arduino, but powered from a separate 5V voltage source (using an 2N3904 NPN ...
2
votes
2answers
69 views

What can be the reason for a voltage drop across daisy chained RS485 servo motors?

We are using a set of RS485 servo motors(Robotis EX-106) for our humanoid robot. This motor has a 4 pin connections namely Ground,VCC, D+ and D-. The Ground and Vcc terminals are from the power ...
0
votes
1answer
50 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 ...
-3
votes
0answers
32 views

Request for separately excited DC motor specification

Can anyone provide actual separately excited DC motor specifications(resistance,inductance,friction coefficent,inertia,value of constants etc..(need it for simulation purpose)?
0
votes
1answer
53 views

Power adapter versus Power supply

I have a mini water-pump/motor hooked up to an LM338 (similar to LM317, but capable of higher current output). I set up the LM338 to create a 6.1-V output, from an 18-V input; this was done by ...
1
vote
4answers
133 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 ...
0
votes
0answers
21 views

Power DC motors via UK mains, controlled by arduino [migrated]

So I was wondering if someone could tell me of a method by which I can power a group of 12 motors via UK mains, I assume resistors or something will be needed to reduce the voltage down to that which ...
6
votes
2answers
2k views

how big are the FETs used to drive Tesla cars

So I've been looking into bldc and motor drivers lately (ESCs). Generally larger the BLDC motor the larger the FETs need to be in order to suppluly needed current. One can do this either by using a ...
-8
votes
4answers
79 views

One motor connected to 4 generators or alternators - why would it not produce more electricity than it consumes?

OK so here is something I have been curious about. Let's say we connect a single electric motor (driven by e.g. an automobile battery) to 4 different generators (or alternators). Would it be ...
3
votes
2answers
362 views

Precision angle (0.5° or better) with a motor

For a project, I am using a Hall effect absolute rotary encoder (AS5048B from AMS: http://www.ams.com/eng/Products/Position-Sensors/Magnetic-Rotary-Position-Sensors/AS5048B). It claims to have 14-bit ...
0
votes
4answers
107 views

Standard way to tension a string using a motor?

I am dealing with a design that requires me to tension a small string, about 5 inches long with a diameter of about 1-2 mm, and then keep it under tension (lock it in place) without the use of ...
0
votes
1answer
70 views

Arduino Motor Control Circuit with Power Transistor and H-Bridge

I'm new to motor control, and I'm trying to create a circuit to control this motor: http://www.robotshop.com/en/banebots-rs-550-motor-12v-19300rpm.html The key electrical characteristics for my ...
3
votes
3answers
384 views

What do i need to get this motor running off a car-battery?

I'm going to build a motorized barn-door mount for astrophotography, but have ABSOLUTELY no experience with motors, circuits or anything else related to the motor. This is the motor I bought: ...
0
votes
2answers
54 views

Crude simulation of a dc motor

I have a 24V battery bank and would like to discharge it in order to test the performance of different solar charge controllers. Eventually the batteries will supply a 2hp (1500W) DC motor and it is ...
0
votes
2answers
60 views

How to stop my motor from resetting my microcontroller?

I'm assuming (no way to verify) that when the motor pulls too much I get voltage spikes which cuts out my microcontroller. Here's my circuit, any suggestions on how to fix this issue? The left chip ...
0
votes
1answer
34 views

Turn Stepper Motor Off when Idle

I was wondering if there is a way to cut power to my stepper motor when it is not in use. I dont particularlily need it to hold its position because in my setup it doesnt really need to torque agaisnt ...
0
votes
1answer
40 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.?
0
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0answers
26 views

What should I use to program these ESCs?

I am working on a project involving brushless motors, and as such I will need a brushless Electronic Speed Controllers (ESCs). If I were to buy one of these two ESCs, what would I use to program ...
0
votes
1answer
51 views

How accurately can an ESC detect the number of RPMs?

I am working on a project involving brushless motors, so I got an ESC to power them. The problem, is that I need to accurately control the number of RPM. Can an ESC, like this one, control the number ...
1
vote
2answers
99 views

Identifying live, neutral, and ground wires cold

I have a European (230 volt AC motor, no markings), 1 phase (I think). It is roughly 6 inches long, just to get a sense of the scale. It basically wobbles when current is supplied to it. 1) I ...
2
votes
0answers
37 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 ...
0
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0answers
43 views

Can ESCs (for brushless motors) be quickly reversed?

I am building a set of reaction wheels, using old "IBM Deskstar" harddrives. I want to power the brushless harddrive spindle motor using an ESC, such as those for model airplanes. Since I'm building ...
0
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0answers
27 views

gate position control using single phase induction motor

I want to control the position of sliding Gate through an induction motor. For initial experimentation I shall use 0.25 Hp single phase induction motor. Motor will require 20-25 rotations for full ...
8
votes
3answers
896 views

Why don't brushless motors “short”?

You always learn in school that you should never short terminals of a battery because the wires overheat from the large current. If you look at a brushless motor, you'll see that its nothing but ...
0
votes
2answers
66 views

#2 L7809CV regulators, connected to #2 9vdc motors

I simply want to connect 2 motors as i show in the image, using a 12VDC power source and 2 #L7809CV, right now the circuit is this you can see in the image i made. The GND its the same source for ...
0
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0answers
47 views

AC Motor operating region

I've been using an ABB IRB 2400 robotic arm to gain experimental data and write a report based on the data. I found that when I operated it at different speeds for pre-programmed paths, I got a ...
0
votes
1answer
67 views

Understanding motor controllers and example application

I'm rather new to the world of motors and motor control circuits - about all I know is that you need one. My intended application is to take a DC motor and create a "servo", which I understand to ...
0
votes
2answers
74 views

What capacitor and resistor to use in my simple circuit?

I’m quite new to electronics but I’m making progress learning about it. I would like to make a circuit to control the speed of two electromotors. (Or two circuits to control separately, whatever is ...
0
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0answers
29 views

Designing a motor driver for my robot

I'm new to electronics and i have a task at hand : to design a motor driver board for my turtlebot(an open source robot) . Having said that , im using a johnson gear side shaft motor that draws at max ...
0
votes
1answer
104 views

Regenerative braking at any speed below maximum - how is it done?

My mobility scooter has a motor controller with regenerative braking - but regeneration seems to take place even at low speeds, well under the maximum! I know it does this because if I reduce throttle ...
0
votes
3answers
62 views

Motor undervoltage

In the situation of a motor losing voltage, say it's rated for 240vac, but it's only receiving 190vac, what happens in terms of the power triangle? Does current increase, does it slow down and reduce ...
0
votes
0answers
20 views

How to bring the back EMF and current in phase to get max torque in IPM machine

I am trying to control the speed of an IPM motor using field oriented control. I have a problem, my back EMF and stator current is out of phase so I get negative torque. So does anybody have an idea ...
5
votes
2answers
121 views

Voltage spikes when driving DC motor with N-channel MOSFET

I'm trying to drive a DC motor (12V, 100W) with MOSFET IRFP054N. PWM frequency is 25 kHz. Here's the schematic: I know DSEI120-12A is not the best diode for this but I don't have any better right ...
6
votes
2answers
338 views

Why do we need a ramp for stepper motor?

I am a newbie and trying to understand how i can run a stepper motor. The concept i had in mind was that steppers need digital pulses to run, and i tried it out too. I was able to run the stepper i am ...
0
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0answers
58 views

Selecting motor for a DIY wheelchair stairlift

I need to make an wheelchair stairlifter for my stroked mother similar to : So I need to find out one motor in range of 200 Wat for lifting a 200KG load in slope of 43 degree from these options: ...
0
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3answers
85 views

Mosfet time and PWM frequency relation

what is the relation that I have to take into account when I select a mosfet(or a transistor in general) for pwm driving about rise/fall/turn off delay/turn on delay and the PWM frequency? How to ...