An electrical actuator converting electrical energy into rotational motion.

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1answer
57 views

Analyzing electric motor frequency with a microphone and Arduino

I want to analyze the frequency of an electric motor used for an industrial cooling system. It seems to me that the Arduino UNO is fast enough to be able to analyze and calculate the main frequency ...
-4
votes
0answers
25 views

Design of Six phase induction motor

I want to design Six phase induction motor using Finite element analysis (FEA), here i have to use ansys maxwell software. my question is how can i start also for from which particular section ?
1
vote
1answer
220 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: ...
0
votes
1answer
81 views

How is low starting torque of asynchronous AC motors addressed when driving elevators?

Long before variable frequency drives became popular elevators were often driven by dual-speed asynchronous AC motors. Switching speeds was done by changing the number of poles (which is done by ...
-2
votes
1answer
62 views

Capacitor to slowdown the RPM of the Motor [on hold]

Thank you for the help, after confusion, apparently there are cogs in place to slow this down, I am trying to source a Start Capacitor to force the rotational direction. Here are a few details: ...
-3
votes
0answers
30 views

Controlling servo 360 degree(clockwise and anti clockwise) using arduino with “if statement” [migrated]

I am facing a problem to control my 360 degree servo motor using arduino by "if statement" and the input will be potentiometer. For and example, "if the analogRead<200" i want the servo motor to ...
2
votes
1answer
3k 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 ...
-1
votes
0answers
23 views

AC Motor Starter Capacitor - humming sound after replacement [on hold]

A tumble dryer stopped working and I found it to be the starter motor capacitor (when switching the dryer on, the drum would not spin but if you manually started to spin the drum, the motor would kick ...
-3
votes
1answer
64 views

Is this diagram correct? [on hold]

I have created the below mentioned circuit diagram: I just wanted to know that have I drawn a good/correct diagram or should I make any changes to this diagram? I have not added the resistors in ...
-2
votes
0answers
26 views

What type of motor should I use?

I would like to build something similar to the project in this video: https://www.youtube.com/watch?v=sO2-tqoyGik I'm just starting off with Arduino projects and have no experience in electronics. ...
5
votes
1answer
132 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
votes
1answer
90 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
118 views

DC motor speed control: 12VDC 700mA fan motor powered by 7.2Ah sealed lead-acid battery

I am using a 7.2 Ampere-hour Sealed Lead Acid Battery to power a 12V DC motor which is driving a fan, and I need to understand ...
2
votes
2answers
62 views

Which of the following motors best suit as a wind generator? [on hold]

I'm watching some brushless outrunners with low kv as a generator for a simple wind turbine that I'm going to build soon. It might not be a scale or fully useful turbine, because I want to build it ...
-6
votes
0answers
33 views

Electronic kicking machine [closed]

Does anything that uses a servo or other to simulate striking an object as if it was being kicked at moderate force exist for sale?
-1
votes
1answer
105 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
2answers
84 views

Strategy for a learning lawnmower robot, and choices of motors

I am pondering on building a practical learning lawnmower robot (could be Arduino based) and I am wondering if this will work. The robot will be both autonomous and RC (radio controlled). Given some ...
2
votes
1answer
60 views

Connecting cables when end point rotates 360

I need to be able to rotate raspi camera 360' by motor and up/down by servo. The problem is that when I rotate it 360', all camera cables will tangle up. What is the method to make it right? I need ...
3
votes
1answer
61 views

What's a good set of PWM values to make sine waves for a 3 phase motor?

I'm building a synchronous rotating spark gap for a tesla coil. I have a working mcu (Kinetis K64F) driving a 230volt inverter board and it spins a 3 phase synchronous motor. The motor is a ...
3
votes
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
127 views

Mechanical Power (Application) and Electrical Power (Stepper Motor) Discrepancy

For my application I need a torque of \$\tau=0.87 \, Nm \$ and a speed of \$ w=140 \, RPM \approx 14.65 \, rad/s \$. This gives me a mechanical power \$ P_m=12.75 \, W\$. $$ P_m=\tau w $$ I have ...
2
votes
2answers
589 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 ...
1
vote
1answer
43 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 ...
0
votes
2answers
69 views

Clarke-Park transform for a 3 phase induction motor current

I am facing some problems in performing clarke-park transform for an induction motor(4 pole stator, squirrel cage IM). The motor is run with three sine wave inputs, 120 degrees phase shifted with each ...
0
votes
1answer
19 views

How to put a delay timer on a micro motor small Area

I am trying to put a micro motor basically as small as I can inside of a 1"or so wide tube like a long fishing plug, I am going to put a small prop or propeller on one end. What I need is to be able ...
1
vote
4answers
629 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 ...
2
votes
2answers
736 views

Controlling speed of motor through L293D using TLC5940NT

I am trying to control a DC motor through an L293D. Ultimately I am controlling it with an Arduino, but I am trying to use a TLC5940NT chip as an intermediary to increase the number of outputs that I ...
0
votes
2answers
46 views

Control of a coreless DC motor using a PWM and a mosfet

I'm using 4 Si2302 logic level mosfets to drive 4 coreless dc motors. The speed of the motors is control led by the PWM signal from an Arduino Pro Mini. The power supply for the boards is a 3.7V (4.2V ...
0
votes
1answer
97 views

Arduino UNO not working with L293D

I am creating a simple robot that is controlled by an Arduino UNO, and given instructions by a button matrix. One can press 4 buttons for Forward, Backward, Left and right on on the matrix array, ...
0
votes
0answers
31 views

Rotating plate motor with position feedback

I am currently building a 3D scanner and I want the camera/laser to be fixed and the subject to move on a rotating plate. This is where I am now : the rotating plate design. Unlike most general ...
1
vote
1answer
56 views

What does PWM width control in brushless motors?

For servos PWM controls angular rotation - for example 1ms width means 0 degrees and 2ms means 180 degrees (it is PWM width is proportional to angular rotation). I am not sure what PWM width ...
0
votes
2answers
50 views

Rotating a motor according to calculated output [closed]

I have 13 photodiodes. Positive connection from battery is connected to the positive end of each photodiode. The position of photodiodes is as shown below: ...
3
votes
1answer
107 views

BLDC speed/torque control with L6229 or L6235

I'm trying to control 12V 12,000 rpm BLDC motor with 3x120° Hall sensors using ST evaluation board based on L6229 IC. I tried to control motor's speed by feeding PWM to FWD/REV pin as suggested in ...
2
votes
2answers
71 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* — ...
2
votes
4answers
235 views

Slowly turn a planisphere at the sidereal rate

My problem is to rotate a planisphere (a star chart) at the sidereal rate. I will set the planisphere to its initial position manually, then turn on some device which rotates the planisphere on its ...
1
vote
2answers
62 views

Difference between capacitor start and capacitor run Induction motors?

All though in both types of Induction Motors, capacitor does the job of phase shifting to produce the rotating magnetic field, their working principle is the same. Then whats the point in ...
3
votes
1answer
3k views

L297 stepper motor driver inhibit issue

I've knocked together a L297/L298 stepper motor controller and have a problem with what seems to be half the output. On the final 4 output lines after the L298 and diodes, I have 2 bipolar LEDs to ...
0
votes
0answers
33 views

How to control direction AC motor with 555(clockwise-off 5sec-anticlockwise)

How do I control an AC motor direction with a 555 timer monostable delay configuration and a few relays.The nature I want it to be is anticlockwise all the way(with a press of a button) then press ...
0
votes
1answer
117 views

Desired response of PI controller in motor vector controller

In vector control (field-oriented control) of motors (specifically induction motors), a rotating reference frame is attached to the rotor flux to give "DC" values in the current controller. This ...
0
votes
1answer
121 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
2answers
147 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 ...
0
votes
0answers
10 views
0
votes
1answer
33 views

torque of locked gear motor vs gearless motor

Do gears increase the torque of locked/stalled motor ?. I understand that in case of rotation of shaft the gears will increase the torque because of transmission to slow rpm. But what makes difference ...
0
votes
1answer
55 views

Multiple Motors and one H bridge

I am trying to make one H bridge for four identical motors. I do not want to make more than one H bridge by any means. I got a way to do that but I need your recommendation. I am going to make all the ...
0
votes
1answer
96 views

L293d pin1(enable pin) problem

I am working on dc motor speed control project in which I am using 12 v dc motor , l293d motor driver ic and pic16f877A for controlling the motor. Pic16f877A is sending pwm signal from its RC2 ...
4
votes
2answers
988 views

What do the numbers on motors mean (How do I read them?)

I salvaged from an old microwave, the motor that spins the food tray. I'm trying to figure out how much voltage I need to apply to it in order to get it to spin, but I cant make any sense out of the ...
0
votes
1answer
113 views

Help with building a 3 Phase DC Motor Controller

I'm looking to design the power stage of a 3 Phase DC Motor Controller for use with the Emrax 268 motor. The maximum input battery voltage would be no higher than 300VDC and the maximum continuous ...
2
votes
2answers
76 views

Is stalling a DC Motor with rated current safe for the motor?

I know that stalling DC motor can cause overheat because of excessive current. If i will limit the current to the rated current of motor, is there still issue to damage the motor ? to be more ...
0
votes
1answer
128 views

Clock / timer activated 2 second voltage timer for wiper motor project

Ok, I need a 12 volt voltage timer using clock or timer for a wiper motor. I am working on a project in my garage. Simply put, I am wanting to use a wiper motor that will open and close a spring held ...
0
votes
3answers
324 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 ...