An electrical actuator converting electrical energy into rotational motion.

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1
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3answers
68 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
votes
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 ...
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 ...
0
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2answers
80 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, ...
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votes
0answers
21 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
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 ...
5
votes
1answer
69 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
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
votes
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
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3answers
2k views

Control hacked servo motor speed using L293D and PWM

I've got a L293D and a PIC16F877A outputting PWM. Not real PWM, just using Timer0 to turn ON a pin for 2 ms and OFF for 18 ms (total of 20 ms period). W.R.T. to the above schematic I got ...
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
votes
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?
0
votes
2answers
96 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
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 ...
1
vote
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
votes
1answer
95 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
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 ...
-1
votes
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 ...
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votes
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.
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 ...
0
votes
1answer
115 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
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 ...
-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 ...
0
votes
2answers
92 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 ...
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votes
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
votes
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
votes
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 ...
0
votes
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 ...
3
votes
2answers
97 views

What Is Motor Amps

Just saw something on an electric dryer that said 230 volts 7.8 amps 7 motor amps Does motor amps have to do with VA and Power Factor? To clarify, the dryer was one that dries your hands in ...
0
votes
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 ...
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
votes
2answers
108 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
1answer
97 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 ...
0
votes
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 ...
0
votes
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 ...
0
votes
1answer
68 views

Need a very low power, low force motor/actuator

What are some alternative types of motors/actuators that can be used instead of servos? I need some way of inducing a slight bit of motion/movement but with very little force and power consumption. ...
0
votes
1answer
35 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 ...
1
vote
1answer
114 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: ...
2
votes
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
81 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
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, ...
0
votes
1answer
43 views

Dupont connector for 5A

I have to do a connector adapter, that has to handle 5A current, from a pwm motor driving circuit(power mosfet), to the motor. I have not found the current rating for dupont connectors It is ...
0
votes
3answers
189 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 ...
-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 ...
9
votes
4answers
5k views

Why use DC motors for driving elevators?

This New York Times article says that on November 14, 2007 Consolidated Edison Company was going to end supplying direct current to the remaining several buildings that used those to run elevators. I ...
0
votes
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 ...
0
votes
1answer
70 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 ...