An electrical actuator converting electrical energy into rotational motion.

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-2
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1answer
84 views

120v AC motor on 220v supply? [closed]

What happens when a 120v 15A AC motor is connected to a 220V supply? In case this is a destruction, what should be the power rating of a converter that is to be used?
0
votes
0answers
56 views

using a sycnrhonous motor to drive the voice cone in a speaker

It is possible to consider any arbitrary signal as a continuous function of phase and amplitude. In particular, a digitized audio recording (assuming Nyquist was satisfied) can be transformed into a ...
1
vote
1answer
99 views

How to prevent DC motor from dropping voltage of supply when switching on

I have a circuit which uses an ATtiny85 output to a transistor (S9013), which will trigger a relay that controls a motor. The reason for the transistor to relay is because I do not have a transistor ...
0
votes
3answers
201 views

Relay not switching correctly, controlled from ATtiny85, output to motor

I have an ATtiny85 switching an NPN transistor, which will in turn switch on a relay that will run a motor. Everything is run off a 3.7V 18650 Li-Ion battery, but I have since moved over to a variable ...
0
votes
0answers
60 views

PM synchronous motor parameter measurement

I am trying to find the parameters of a surface mounted PM synchronous motor using the application note AN4680 (PMSM Electrical Parameters Measurement) and had some queries regarding it. The Ld ...
1
vote
0answers
73 views

Current/Torque - curve for an ASM

There is this exercise where I don't have a clue how to get the solution. It's about asynchronous machines, where with the help of field coordinates the string currents (istr) are split up into ...
2
votes
2answers
133 views

How to find I-V characteristics of motor?

I have a motor that I'm turning with another motor. I can determine the speed of rotation with a tachometer. One motor is powered with a power supply and it is coupled with another motor. I need to ...
0
votes
3answers
116 views

ATtiny85 to control a relay, which will turn on and off a motor

I am trying trying to control a 5V relay (SRD-05VDC-SL-C) with the ATtiny85. I have a simple sketch uploaded (Blink without Delay example): ...
0
votes
0answers
63 views

Forgot to connect ground for H-bridge, now it doesn't work?

I have an TLE5206 h-bridge IC that can handle 5 amps and I'm giving it a supply voltage of 12V. I was just testing the motor with the power connected but I noticed that the ground cable broke off ...
0
votes
0answers
32 views

Explanatory electromechnical animations: What software used?

My friend is trying to show a hall effect sensor setup. He wants both the electrical oscillograms and the mechanical view of a rotating signal (from the motor). What software exists to aid in ...
0
votes
2answers
106 views

Does frequency equal the number of steps a stepper motor will do?

http://www.thorlabs.us/thorcat/ETN/ZFS13B-Manual.pdf I am supplying a driving PWM signal to this stepper motor. However, I want to specify exactly how many steps to take with this motor. Does the ...
0
votes
1answer
34 views

Power requirements for offset motor or other forms of vibration

I need to generate vibrations to provide tactile feedback. The device has minimal power available. What type of power do offset motors require? Are there other forms of vibration that can use less ...
0
votes
1answer
89 views

Is there any way I can power my 120-220V AC motor from a battery

I am building a new robot, it's a little bit heavy, so it's hard to find a motor that can push it. I am thinking of a way to use machines at home (I have two options: Automatic hair drying machine and ...
-1
votes
1answer
72 views

Motor without magnetism [duplicate]

Every electric motor I know, takes electricity and converts it over a magnetic field, for generating movement. Is it possible to generate significant movement, based only only on electrons movement? ...
0
votes
2answers
121 views

How to reduce the amplitude of my PWM signal?

I'm using a PWM control signal that ranges from 0-24V to drive a stepper motor. However, the datasheet in the driver says it should range 0-5V. How can I bring down the amplitude of my PWM control ...
3
votes
3answers
473 views

MOSFET overheating in pwm control

I'm using a MOSFET to switch a 24V, 15A load, with the gate input being a 500Hz PWM signal. However, this is causing the MOSFET to overheat and blow. Any suggestions would be appreciated. R1 = 100 ...
0
votes
1answer
70 views

Systematically, what would happen if I give a crank at the shaft of a motor?

In particular, I would like to know what would happen if I crank the shaft of the following kinds of motor: brushed DC, brushless DC (the kind used in computer fans now) and 6-coil 3-phase AC ...
0
votes
2answers
70 views

Using transistors to minimize the number of Arduino pins used for this stepper motor driver

Alright, I know very little about what I am currently asking about, but here is the gist of it: I want to build a cnc machine out of some old floppy drives. I purchased a couple L293D dual H-bridge ...
2
votes
1answer
357 views

DC Motor as a Generator Voltage and Current

Is there any way to calculate the expected voltage and current, assuming I am turning it at the specified RPM value, when using a DC motor as a generator without physically testing it? In my case I ...
-1
votes
1answer
63 views

Controlling 1.5V motor using microcontroller output

I want to control a 1.5V motor using a microcontroller output. The motor draws about 450mA stall current. I am considering to use a Darlington transistor such as TIP120 to bridge the microcontroller ...
0
votes
1answer
127 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
154 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
2answers
131 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
238 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
72 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
130 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
votes
2answers
126 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
80 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
120 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
80 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
73 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
138 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
2answers
98 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 ...
0
votes
1answer
88 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
401 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 ...
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
92 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
419 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
125 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
212 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
397 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
97 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
88 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
38 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
100 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
votes
0answers
30 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
112 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
141 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 ...
5
votes
1answer
95 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
votes
0answers
57 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 ...