An electrical actuator converting electrical energy into rotational motion.

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16 views

DC or Stepper for exoskeleton arm

I want to try to do an exoskeleton arm, so I need at least two motors, one to simulate the power of biceps and another for shoulder, I had only use stepper motors and dc motors, but Im not sure if ...
1
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3answers
82 views

D.C. motor works underwater?

I recently immersed a small, 10 volt D.C. motor underwater for experimentation purposes. When I turn on the power, always to the same power level, it SOMETIMES spins effortlessly, and other times it ...
-1
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0answers
22 views

How to measure the impedance of Induction motor windings

I want to know the easy method of measuring the impedance of induction motor windings (coils) in rectangular form. Say, Z=R+jXL; need to identify Z, R and XL as accurate as possible
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2answers
81 views

Many small and cheap linear actuators [on hold]

Me and my friends are trying to build a linear actuator matrix. It's supposed to be a grid of pins that go up and down at reasonably fast speed (more than 1cm/s, the faster the better). Problem is, ...
0
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1answer
42 views

wiring for a 4 wire AC motor

I have a working garage door opener and I'd like to use its motor for building a edge sander (woodworking). The model number is the Genie IMS1000 and here is the actual picture. It has a single ...
0
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1answer
43 views

What's the relationship between ESC pwm input and output?

I'm using ESC(Electronic speed controller) to control outrunner brushless dc motor. As you know ESC detects ppm signal between 1ms and 2 ms approximately. So my ESC detects signal between 4% and 9% ...
0
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1answer
30 views

Purpose of Charge Pump in Motor Driver IC

I have seen and understood the purpose of charge pumps. Used for pumping voltage levels in case of RS232 transceiver IC's. But most of the motor driver IC's also includes a internal charge pump ...
0
votes
1answer
28 views

DC Motors Power Supply Connection

I am currently working on a project using Arduino UNO and two 3 volts DC motors. I chose a 9 V Goldtop battery to power my Arduino. The two motors draw voltage through the 3.3 V pin in the Arduino. ...
0
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1answer
24 views

What does Adafruit motorshield max amperage mean?

On the Adafruit motorshield it says "1.2A per motor (3A max)." What exactly is this telling me, that the motors are drawing 1.2 amps from the battery?
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1answer
23 views

L293ne wireing help

First real project in many years so please accept my apologies of this is a silly question. I want to use the L293 to drive a motor (or 2). Using a raspberry pi which I have done using the add on ...
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2answers
35 views

Some basic questions concerning Stepper motor with geared head/geared box

Some basic questions concerning Stepper motor with geared head/geared box. What is the meaning the reduction 1:56 (1/56) or 1:100 (1/100) or 18/1? According to some charts: How can i know ...
0
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1answer
30 views

Providing external voltage to a motor connected to arduino

I am a noob in electronics . I am just learning it bit by bit. The below is my connection. As you can see pin 13 is connected to one terminal of the motor and the other terminal of the motor is ...
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0answers
37 views

Do you need an encoder for an AC Gear Motor? [closed]

I am trying to determine whether I should find an encoder for the AC gearmotor I plan to use.
-1
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2answers
65 views

Providing a higher voltage to a motor [closed]

I have a 9v motor but I want to give it a lot of voltage so that it can open a door lock so if I attach it to a 18 v battery source will it be alright? Noob in electronics . Help is highly ...
0
votes
1answer
69 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 ...
-1
votes
2answers
69 views

will i damage this toy motor by running it on a higher voltage? [closed]

I have a hand held shaver that is chargeable. the socket plug for the device says 02A250V- and the green battery inside the device looks like this: and the ...
-3
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0answers
52 views

Running a toy motor using Arduino

I have setup a circuit to run a toy motor using Arduino. The fritzing diagram link is below. Motor starts spinning but only after I manually rotate the axis. Could it be because there is not ample ...
0
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0answers
2 views

Control Brushless ESC From Arduino [migrated]

I am trying to build a quadcopter using an arduino. I Bought 4 30A ESC's from Ebay the link is ...
0
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2answers
53 views

running AC synchronous motor with DC

I have a gadget that does contain a 12V AC synchronous gear motor (2 Terminals) that i want to hack. I want to supply the gadget with 12V DC (among other changes). Up to now i use tiny AVR and a ...
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0answers
27 views

Controlling Linear Actuators

I have two 24in linear actuators (http://www.progressiveautomations.com/linear-actuator) that run at different speeds when I connect them in parallel to a 12V battery. How can I get them to run at ...
0
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1answer
28 views

VFD and Car Batteries

Can I use a VFD to drive a 3 phase motor if I drive the VFD with 48V from some series car batteries? The VFD has a single phase input and 3 phase output. Is it just a rectifier in there that charges ...
3
votes
1answer
67 views

3-phase Brushless Motor - Are Volts and Amps at (X)RPM equal/similar when used as Generator?

If I have a Brushless 3-phase motor that spins at 3000rpm when given 6.0A @ 20v (no load) will it produce 6.0A and 20v (or anywhere close) when used as a generator and spun at 3000rpm?? And i suppose ...
0
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1answer
25 views

Continuous charging and varying load on 48v AGM - Will an ESC work with a battery that is being charged?

So, in a lightweight IC/electric hybrid motorcycle I am using a small 4-stroke engine to turn a Brushless RC motor (the generator). Then a 3-phase rectifier bridge to supply 59.2v DC @ 12amps to a 48v ...
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1answer
39 views

How to estimate motor current under load

How do you estimate the average current under a typical load of a brushed DC motor? I'm trying to size the right motor, motor driver and battery to propel a small two-wheeled platform using this ...
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votes
3answers
47 views

Is there a change in the voltage/current when motor is locked up? How can one sense this?

I am working on a motor control system, and I'd like to be able to know when the motor has reached its max output and has locked up (shaft no longer able to rotate, due to mechanical force pushing ...
0
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1answer
36 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 ...
2
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2answers
47 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* — ...
0
votes
1answer
50 views

How do I make a 6v DC motor charge a phone battery via 5v, 2amp

I am a high school student who knows absolutely zero about electrical engineering (I may have even misworded the question), and I am interested in how I could connect a small motor (as in putting a ...
0
votes
1answer
30 views

Measure the current draw of a motor with a slow multimeter?

I have a motor that is in a printer housing (inkjet - the one that moves the head back and forth). The motor is attached to the printer head assembly. I want to measure the current draw of the motor, ...
-2
votes
1answer
52 views

Electric style motor speed control [closed]

I was just wondering how I would go about making a pedal that controls the speed of a motor. It would also have to include reverse motor capability. My tech book at school already has a circuit for ...
2
votes
2answers
74 views

Is it possible to change the speed of an AC motor(drill press) without losing too much torque?

I have a drill press as in the image below, it runs from 110V AC 60Hz and has internal belt reduction. Unfortunately however for some materials and hole widths, I need it to go even slower than It's ...
1
vote
2answers
32 views

Calculate rotor slip without knowing synchronous speed

I am given the rated values of a squirrel cage induction motor: A 300hp, 2300V, 3‐phase, 60Hz squirrel‐cage induction motor turns at a full‐load speed of 590r/min. What is the approximate value ...
0
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1answer
40 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 ...
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2answers
55 views

How does a synchronous motor know to increase current when the mechanical load is increased?

Consider a very simple singe phase synchronous motor, such as the one shown in figure 1. This motor will not be self starting, but if an AC voltage is applied and the permanent magnet is given an ...
0
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0answers
66 views

Control tons of servo motors with one pin on Arduino?

I'm controlling 15 servo motors with Arduino Uno. The 15 servo motors will be doing the same thing all the time, so I'm trying to using one pin for all of them (But I'm using external power source for ...
0
votes
1answer
36 views

Is Motor KT Linear with current?

This may be a little basic for some. Sorry in advance... I would like to use a large 3ph motor to perform a fast, controlled, stop. The rated motor torque is 850Nm @ 242A. My inverter claims to ...
0
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0answers
24 views

PM Synchronous motor Id-Iq current control

I am trying to implement the current control (Id, Iq) of a four pole PM synchronous motor. I am having trouble in making the Iq current follow a set reference. I had also implemented a cascaded ...
0
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0answers
27 views

How do I power / control a brushed 115V AC motor?

How do I power a brushed 115v AC motor? Would there be any potential damage from just wiring it to just plug into the wall or do I need a transformer and a capacitor or something? Thanks!
0
votes
1answer
76 views

Is it possible to run a motor inside a black box by applying an EM field, without knowing anything about the motor?

Is it possible to run an electric motor located within a container by applying an external EM field over the container, if you do not know anything about the motor? The container with the motor would ...
1
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3answers
69 views

H-Bridge with 1 PWM and 1 Output

I'm looking for a solution to control the direction of a powerful DC Motor. I came up with the idea to use a H-Bridge. Since the motor uses up to 3.2A the amount of possible H-Bridges is quite ...
0
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0answers
44 views

DC Motor Speed Control With 555

Can you please explain why this circut is not working in simulation. I get GMIN Stepping failed, too many iterations errors. Is there something wrong with the design?
0
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0answers
46 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
21 views

Nonunfirm air gap modelling

Is there a chance to do model of 3-phase induction motor with nonunfirm air gap not using ton of maths? I'm planning to use matlab and dq transformation model and on the out get frequencing of torque ...
0
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0answers
27 views

Is the armature resistance of a DC motor the sum of the resistance of each winding?

I am aware of a number of methods of measuring the armature resistance of a DC motor including locking the rotor, giving a fraction of the rated voltage, measuring the current and calculating the ...
3
votes
1answer
53 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 ...
0
votes
1answer
41 views

Powering up arduino with Xbee and a 6V (run on 5V) motor

I am working on a small project where i'll need an arduino to control a motor wirelessly using Xbees. I have a 7.4v lipo battery I am wondering will there be a problem or insuffciency if i only use ...
0
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0answers
44 views

L293D for STM32 F4Discovery

I'm trying to control 2 DC motors with a L293D driver and a STM32F4 Discovery board, but I'm afraid that I will break the Discovery. I have read that I cannot directly connect a motor to the GPIO pins ...
0
votes
1answer
46 views

What is a disable input for on a motor controller for?

I'm trying to figure out this motor controller I recently got and it has two pins called PWM / D2 and PWM / D1, disable inputs. I don't understand the description for them and don't know what they are ...
0
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3answers
73 views

Push power assisted trolley with one finger

I recently saw a demo. One man pushed a power-assisted trolley using only one finger. The trolley was loaded with ~40kg stuff and it started from standstill on a up-slope when the man pushed it using ...
0
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0answers
36 views

lmd18245 dc motor driver

How to build dc motor driver lmd18245t. wanna control dc motor with arduino uno by pwm signal so how make driver circuit using lmd18245t ic and in pic. i made circuit schematic is this correct or any ...