An electrical actuator converting electrical energy into rotational motion.

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63 views

Motor speed based on uF of capacitor

I have a single phase duct fan that that run by a capacitor and its running too fast. I don't need it at this speed. Motor: Single Phase Motor 78w @ ...
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2answers
53 views

Which oscilloscopes can reliably measure losses in an inverter for an AC motor?

For my next project at my workplace I am looking for an oscilloscope which gives me good support in measuring the losses in one of the half-bridge switches over one commutation period. The last time I ...
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2answers
176 views

3 phase induction motors with poles not equal to 3x

I am having trouble finding diagrams to show induction motors with poles not equal to 3x. Everything I find is 2 poles per phase. Can anyone explain and help me visualize, for example, a 4 pole 3 ...
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1answer
74 views

PWM or Variable Resistor [closed]

For a school project, I have to design and perform an experiment of my choice. I have chosen to test the efficiency of variable resistors and PWM circuits by testing the amount of energy wasted (heat ...
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1answer
59 views

Solar Motor Circuit Design

Trying to build a simple circuit to power a small pump while the sun is out. Here are the specifics: Solar Panel (60 cell mono panel) Open circuit voltage 36.4V DC, Short circuit current 7.96A. Pump ...
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1answer
30 views

BLDC Current Driver Encountering Current Problems

The attached Schematic uses 6 N Channel Power Mosfets "IRL3303". I have wound my inrunner bldc motor with 180 windings per phase using a 26 Gauge Magnetic Wire. My motor is a 6 pole 2 magnets machine. ...
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1answer
94 views

Using hard disk motor as generator

I have disassembled 20 broken hard disks and taken out the motors, thinking they might be useful. However, they didn't work using DC current, because they required some kind of control circuit. Now I ...
11
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2answers
3k views

Does a DC toy motor emit AC when you spin it?

I just watched a video on Facebook by somebody who built a project to run an LED using a 9 volt DC motor scrounged from a battery operated toy. They simply wired the LED to the motor and then used a ...
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0answers
29 views

arduino relay with 3 motors

I am doing a project where I require to control 2 DC motors and probably 1 stepper motor. The DC motors only have to work in one direction whereas the stepper motor has to be reversable. (the stepper ...
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2answers
77 views

The leads of my 3-phase motor are incorrectly labeled. How do I determine the correct labels?

I connected my new-in-box 3-phase motor to my new-in-box VFD, following the instructions in both manuals and the wiring diagram on the name plate (low voltage configuration). With the power off, ...
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1answer
41 views

Experiment to determine the relation between applied voltage and angle of output shaft of a DC Servo motor?

My project need to control the position of a DC Servo motor, but I don't know the plant model of my motor. So, I want to make an experiment to acquire the data between the applied voltage and angle of ...
-3
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2answers
72 views

Some question on SERVO MOTOR [closed]

Basically we give a PWM wave to the control input, but what will be the input for the error detector...? How is this PWM wave converted to some voltage value that can be compared from the ...
0
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1answer
40 views

Motor not strong enough to move buggy

For my A2 final project, I am making a buggy that can be programmed using an onboard control panel. I have a GENIE E18 PIC Microcontroller to control the ins and outs, with an L293D Motor Driver to ...
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1answer
27 views

Multiple voltages and currents required in one circuit

I have a circuit with the following components: microcontroller - 7-12V, v.low current 2x Servo - 6V, 250mA Solenoid - 18V, 14 Ohm coil Geared motor - 9V, 6A stall current Power supply - 19V, 3A DC ...
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2answers
63 views

Startup current of an induction motor when using VFD

A 3-phase AC induction motor has the following ratings: rated power: 130kW input power: 140kW rated voltage: 3x400 V rated current: 270A supply freq: 50Hz there is no soft-start The motor ...
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0answers
16 views

Invertek Optidrive E2 Modbus

Has anyone communicated to an Invertek Optidrive E2 using Modbus? Even when I follow the way the user guide indicates it should be done, I get responses consisting of a whole lot of zeroes. E.G. I ...
0
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1answer
47 views

How does a moving magnetic field cause motion in the Al strip rotor?

Consider the following information: https://www.youtube.com/watch?v=7snjbmdYlDI How would you explain how the moving magnetic field causes motion in AL labeled rotor?
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1answer
42 views

How to wire a 5-leads single phase asynchronous motor to a 3-leads bidirectional controller?

Autistic has kindly identified the legacy motor I would like to recycle as a single phase asynchronous motor (see linked thread). Here is the internal schematic: (source thread) I would like to ...
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1answer
78 views

What is the type of this legacy motor and how is it supposed to be controlled?

A friend of mine is going to give me an old Dayton 8F047 which I would like to recycle, but it is now obsolete and I cannot find anything other than a schematic which is reproduced below. ...
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1answer
58 views

using power bank to power a nema 17 stepper

I was wondering if it is possible to power this 3.75V/1.7A nema 17 stepper with a power bank which have a 5v/1A output like this one for example . Ps: I am new to the electronic world .
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3answers
75 views

Running 3-6V motors with 7.2V [closed]

I'm using the popular DIY motor: Which his operating voltage is claimed to be between 3-6V. I'm using a battery of 7.2V. I know that running the motor outside the recommended voltage range might ...
3
votes
2answers
173 views

DC motor and power

With DC motors, I believe the graph below depicts the typical performance: Does that mean, even for a high speed motor with a gearbox for speed reduction, the same characteristics apply? That is, ...
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1answer
43 views

Washing machine / microwave motor - AC or DC

If I take an old washing machine motor and try to convert it into a generator would it work and if so would it generate AC or DC? Same question with a microwave motor. I know it uses permanent magnets ...
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0answers
58 views

ringing shunt resistor on induction motor

I'm working on a three-phase AC induction motor driver. The main supply is 48V and I plan to operate in the 0-40A range. The six MOSFETs are driven by PWM signals via a gate driver. The PWM signals ...
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0answers
34 views

Purpose of resistors from phase to phase on 480V motor

I have inherited a project with a motor circuit that I cannot figure out the purpose of some resistors. It was initially designed for operation in Europe at 400V 50Hz. Since it is operating here in ...
0
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1answer
74 views

How to calculate the right motor size for a soil sifter [closed]

How would one calculate the proper size of an electric motor to properly drive a soil sifter? Assumptions: Screen: flat, 18"x24", 1/4" to 3/4" wire cloth (interchangeable screens), total weight ...
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2answers
42 views

measuring a bad motor and large current spikes in a brush motor [closed]

I am new to this forum, I am an EIT and I have been tasked to implement a fixture to measure high current spikes on brush motors when loaded and unloaded. I am at a loss here as I have never ...
2
votes
1answer
58 views

How to Raise and Lower an Object via Arduino/Photon

Completely new to anything dealing with hardware (Programmer person) and have no real clue as-to how I can accomplish what I want. The goal is to be able to move an object up and down (Specifically ...
2
votes
2answers
87 views

Function of characteristic curve of DC motors

I have found in the following graphic the characteristic curve of a locomotive with six DC series wound electric motors at 3000V. As a translation: the y axis describes, on the left, the force in tf ...
8
votes
3answers
1k views

In a brushed DC motor, why do the brushes have springs?

In trying to understand brushed DC motors, this post has been very helpful but I still have some fundamental questions about the brush mechanism. For instance, what is the purpose of the spring? And ...
-5
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1answer
44 views

Produce current

Ok, so I was trying our an experiment to generate minute current. I got a battery operated gear motor which can produce current to light ant led bulb when rotated. I am trying to create an automation ...
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votes
1answer
76 views

How to build an Electric Vehicle (explain like I'm five) [closed]

I'm a business major investing time to learn more about Electric Vehicles. For starters, I wanted to understand the elements that come together to make a simple Electric Vehicle, maybe a scooter. I ...
7
votes
2answers
151 views

How does a hair dryer change its motor speed? Diagram included

I'm working on a side project where I need to figure out how a hair dryer works...so I took apart a hair dryer and made a circuit diagram (below). I am much more mechanically inclined than ...
0
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1answer
36 views

Is it possible to over-power a 3-Phase AC motor with a AC Controller?

If I have a 200kw motor controller, and a 30kw motor, is it possible to overpower the motor with the controller? My application is for an electric vehicle (golf car, small bicycle, and so on). I'm ...
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2answers
89 views

What are the risks of powering fan AC motor with Triac dimmer?

I'm going to replace current resistor potentiometer with arduino-controlled triac scheme, probably this module. I'm going to load it with 6 motors , 300W each. How bad the EMI gonna be (would I be ...
0
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2answers
93 views

Making a two speed motor - TRIAC and PWM question

I would like to create a dual speed blower which goes into HI when an SSR from a PID is activated. I would like to be able to control the speed of each of the high and low settings. When the SSR is ...
0
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3answers
35 views

Reducing give in bi-polar stepper motor axel

I have the NEMA-11 bi-polar stepper motor (http://www.active-robots.com/3322-0-28sth32-nema-11-bipolar-stepper-with-100-1). The issue is that I am able to turn the axel about 5-8 degrees without ...
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1answer
49 views

help for timelapse slider motor circuit

I need some help designing a circuit for a timelapse slider. Please bear in mind i am a beginner with electronics, so have mercy! The motor will be pulling a trolley (very slowly) along a set of ...
0
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1answer
58 views

How to pick a stepper motor

I'm building something that I want to control from mcus, and while I'm fine with the MCU part, I'm in the dark about motors and want to avoid buying too many of the wrong ones while I figure it out. ...
1
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1answer
50 views

Principle of working of diseqc motor

I'm interested in how diseqc motor works. I mean how satellite receiver communicates with it etc. Is there some literature explaining this? Which field of electronics is related to this? Maybe digital ...
0
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1answer
47 views

What type of motor is more desirable, if the requirement is to rotate a load with high torque by about 30-60 degrees?

Torque required is about 17Nm. The speed for rotation is very small about 10degrees/sec. The load is dynamic and I do not want to apply any torque more then 20Nm, this I want to achieve by using a ...
0
votes
1answer
45 views

Charging and discharging Ultracaps with a 12v DC Brushed Motor

I am trying to store small amounts of energy from a 12v motor with an ultracap. I'm thinking of a 3000F 2.7v cell from Maxwell. I am trying to find out info on charging ultracaps, specifically the ...
1
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3answers
73 views

servo not strong enough to move robotic link fully

I'm currently working on a robotic arm. The servo I'm using is the MG996R. i'm trying to make the servo lift a link that weights 55 grams and 20 inches long. The servo itself is powered with a 9v to ...
-3
votes
3answers
38 views

Enough power for 4 12V 0.95A fans at the same time [duplicate]

I am currently using 1 12V 0.95A fan to circulate air in my humidor (coolerator) and using an AC adapter rated class 2 120V 60/60 with an output of 9V 300mA. Can I add 3 more fans with the same power ...
0
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2answers
42 views

Identify DC motor parameters using Least Squares Estimator

I'm not new to the concept of Least Squares, however, I find it difficult to figure out how to make it identify the transfer function for my motor. I will have my input voltage and an optical encoder ...
0
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2answers
75 views

Replacing electric Ice Machine Motor with a resistor in a Samsung Refrigerator

We bought a house 3 years ago and it came with a Samsung Refrigerator. For some reason the previous owner bought a fridge with an ice maker and never hooked it up. Well you cannot disable this feature ...
0
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1answer
96 views

Calibrating Servo Motor

I am working on a project on image tracking on MATLAB, by moving the mounted camera on a servo motor controlled by the Arduino Uno board, the data is serially sent to the arduino using USB according ...
0
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2answers
132 views

varying run capacitor for speed control of single phase motor

If I want to vary speed of single phase electric motor within say, 10 to 20%max of its rated speed ( or torque ), is it a good idea to change its run capacitor setting ? ( either via multiple ...
1
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1answer
63 views

3 phase AC motor wont start after overloading

A 3 phase induction motor is stuck with a heavy load and was making hum noise. After it is unloaded it still wont start. Any ideas where to start trouble-shooting? Would overloading activate the ...
0
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1answer
21 views

What calculations determine the choice of the overload relay trip class to protect a motor

I know that the motor trip current determines the choice of the trip class, but I do not know what are the range values for each one. Lets say that I have an engine with a trip current of 190. Somehow ...