An electrical actuator converting electrical energy into rotational motion.

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2answers
248 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 ...
2
votes
1answer
138 views

MOSFET Driver Stress

I am using an Allegro Microsystems A4935 3-phase MOSFET driver in a brushless speed controller. I recently got the motor spinning, but when I began increasing the voltage, my commutation started to ...
1
vote
1answer
126 views

High voltage (70V) amplifier

I need to generate a 400Hz 26V rms signal with at least 200mA drive capability. 26V rms means 72.8V p-p is required. It is to drive the rotor winding on a synchro system. I was planning to use 2 x ...
1
vote
1answer
344 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
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votes
1answer
17 views

what type of modification can i use in my MCU in conjunction with my SSC32?

Hello there guys im looking for a way to connect and use a DC motor with a Servo controller such as the SSC32? now given the fact that a Servo controller or driver has 3 pins, PWR GND SIG/PULSE now ...
0
votes
1answer
158 views

DC motors, AC motors, and Kv

As I understand it, DC motors have Kv values because their speed is determined by the applied voltage. AC motors don't have Kv values because their speed is determined by the frequency of the AC ...
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votes
1answer
291 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 ...
-1
votes
1answer
2k views

If interpoles are used in DC motors and reduced the entire armature flux then how is torque induced in the motor?

If interpoles are used in DC motors and reduced the entire armature flux then how is torque induced in the motor?
-2
votes
1answer
291 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, ...
-3
votes
1answer
762 views

charge a mobile using a dynamo

I am making a project to charge a cell phone battery using a dynamo,but i don't know how to start about.also let me know about the power ratings of the dynamo to be used for charging a 3.7V,1000mA ...
2
votes
0answers
275 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 ...
2
votes
0answers
221 views

Controlling a treadmill motor

I'm recycling some spare parts of an old treadmill for a new project. I have the motor with its driver board, the elevator piston and the controller board. All works out of the box, but I need to ...
2
votes
0answers
125 views

Gear motor with encoder: minimum drivable step

I am fancying this motor http://www.pololu.com/catalog/product/2271/specs to motorize an X-Y stage. (Alternative High rpm motors with high reduction ratio and high encoder counts/rev are welcome ;) ...
2
votes
0answers
476 views

Analogue Hall sensored brushless outrunner motor position control

I would like to produce a low cost high power:weight servo drive using a brushless outrunner motor, like those use in radio control planes: Some of these motors leak enough magnetic flux out the ...
1
vote
0answers
47 views

Arduino UNO: How to connect 2 way power for DC Motor?

Currently I'm using Arduino UNO R3 board. I want to drive small DC Motor using same power source as the arduino is using. My motor driver is TB6612FNG and it works well. I have two motors. One ...
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0answers
24 views

Measuring and classify stepper motor

Hi guys I've got a little projet running and need your help: I am going to use a stepper motor and a motor driver, in my mind that should work (maybe with a heat sink for the driver). What do you ...
1
vote
0answers
108 views

electric wheelchair

I'm making an electric wheelchair . I want to lift a total weight of 100kg on it with a max speed of 4mph. So help me choose appropriate motors(dc geared , stepper, or .....) and batteries (12 or 24 ...
1
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0answers
36 views

Is this motor suitable for my project?

i have a project which have 4 18volt DC motors, each motor rotate a screw which is 8mm and pitch 1.25mm and 200mm length vertically, load connected via nut in screw, every motor has 3.5 KG load and ...
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0answers
54 views

What is the differene between zero leading and zero lagging?

The armature reaction of an alternator will be completely magnetising when load power factor is A unity B zero lagging C zero leading D 0.8 lagging Though ...
1
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0answers
121 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 ...
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0answers
42 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 ...
1
vote
0answers
60 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, ...
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vote
0answers
115 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 ...
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0answers
83 views

Overload relay nameplate

The following information appears on the nameplate / description of an existing thermal overload relay (for motor protection) I need to replace with a modern unit of same functionality: IEC 292-1 ...
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0answers
56 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 ...
1
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0answers
66 views

How much has the power density of electrical motors and generators changed in recent decades?

I would like to know how much lighter (if at all) a matched combination of an electrical motor and generator with a given power output would be today, compared to a similarly powerful combination ...
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0answers
95 views

No output at H bridge during quick power drop

I used a H bridge with PMW control to drive DC motor in two directions. I observed a strange phenomenon that during quick voltage drop, the PWM output at M2 is cutoff, although the T4 gate PWM input ...
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0answers
203 views

Why doesn't this relay circuit work?

Objective: A device to prevent automatic restart of a motor (or pump) after power failure. Background: It is well known that aquarium fish are curious and will explore items in the tank. In the ...
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0answers
1k views

Old variable speed AC motor wiring

As a disclaimer, I have a little electronics knowledge, but I'm no expert. I've been given an old 1940's Hunter fan and I'm working on fixing it up. I took the base apart and wiring is pretty bad - ...
1
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0answers
782 views

L298N shield gives relatively low ouput voltage and current

I am using a L298N shield together with an Arduino to drive a 42mm 2 phases bipolar stepper motor. The driving voltage for the motor is 12V and the logic voltage for Arduino and the L298N shield is ...
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0answers
57 views

Why do my outputs look exactly the same for the Allegro 3901?

I am trying to capture results shown in Figure 8 of Allegro 3901 data sheet . My circuit looks like this: The channels above coresspond to the oscilloscope screen captures below: In the image ...
0
votes
0answers
32 views

Technics SL DL5 Turntable Motor

I have just salveged a SFDPC05N01 motor form a Technics SL-DL5 Turntable. I would like to use it for something else. (It's still gonna be a turntable, for videos) My question is how to get this up ...
0
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0answers
12 views

Driving LRA actuator with a driver

I'm using a driver DRV2605L to drive a LRA from the link below. https://catalog.precisionmicrodrives.com/order-parts/product/c10-100-10mm-linear-resonant-actuator-4mm-type The problem is that the ...
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0answers
68 views

How to control a (different) brushless motor

Note: I will be updating this post with detailed images and measurements later. Someone gave me a brushless motor made by Maxon Motor and I have no idea how to control it. The only information they ...
0
votes
0answers
23 views

How do I calculate the number of turns per slot on a stator?

I am in the process of winding a split phase permanent capacitor motor running 1/3 at ~1720 RPM 120V 60Hz. It features 4 poles and 24 slots on the stator. The motor had 18 AWG magnet wire. I am ...
0
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0answers
16 views

Will this TinyCircuit dual motor driver circuit be able to work with these two solenoids and two motors and an 11.1V LiPo?

I'm trying to create a control system for a rocket. I know its a big task. But basically all I have to do is set up a TinyCircuit to pull the pin on two solenoids at 750 feet up in the air which I ...
0
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0answers
42 views

Gate operator - how to tell if gate is open or shut?

I have just installed a LiftMaster model LA100 electric gate operator. I want to interface this gate with my existing phone and household control system, for the purpose of 1) operating the gate ...
0
votes
0answers
43 views

Three Phase Permanent Magnet Rotor Generator Magnetization

I have a three phase permanent magnet rotor synchronous generator. The rotor was recently removed from the machine in order to repair the shaft. The motor when when run at the same speed does not ...
0
votes
0answers
60 views

Split analog signal into multiple outputs

Right now I'm working on a project which involves four motors being controlled by an audio input. I know how to do the audio input, but I don't know how to split it at the receiving end. The idea is ...
0
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0answers
47 views

Driving a small DC motor from MCU very slowly

I have a very small DC motor (like the one used in walkmans ages ago). I'm feeding a PWM signal of about 30KHz into the gate of a BS170 MOSFET which is shunted to ground via 15k resistor. The motor is ...
0
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0answers
23 views

Trying to design a Automatic Return AC Filter Roll System

I get tired of changing my home AC unit air filter out all the time so I was going to try and design a rolled filter material that would automatically spool up/down till it get clean filter material. ...
0
votes
0answers
82 views

Servo motor horizontal steering movement

I wanted to replace existing DC motor - Spring based steering system of an RC car with a servo motor. The existing setup is shown in the image attached. I need to know what would be best method to ...
0
votes
0answers
27 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 ...
0
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0answers
64 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 ...
0
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0answers
36 views

How does Sensorless Vector Control of an induction motor achieved?

I'm trying to make sense of the current and rpm of an AC motor controlled by a VFD drive. Here is the device: ...
0
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0answers
77 views

Adapt electric motor to manual seeder

I am limited on my electronics knowledge, but I want to adapt an electric motor to a manual corn and bean seeder. Why? Because it is very hard agriculture work. It is needed two people, one in the ...
0
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0answers
84 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 ...
0
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0answers
252 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: ...