An electrical actuator converting electrical energy into rotational motion.

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2
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2answers
104 views

mechanical load of an alternator

I'm wondering about alternators used in automobiles and the mechanical load that they present to the engine. My question is: what is the relationship between the mechanical load presented by the ...
0
votes
3answers
91 views

Measuring the Internal Resistance of a Brushed DC Motor for Use in Speed Control (IR Compensation)

Is measuring the internal resistance of a brushed DC motor with a multimeter the correct way of doing it? The resistance seems to vary while the motor is being turned by hand; however, the resistance ...
1
vote
4answers
129 views

Triple pole triple throw relay

I have a turntable which rotates cw and ccw. This turntable is rotated by AC synchronous motor of 230V. I want to be able to rotate the turntable with Arduino. For this reason I need to control the ...
4
votes
2answers
127 views

Electronic Speed Control Concepts

I am a programmer who has never worked with electronics before. I am learning the concepts and hoping to build a quadcopter, with the control software entirely written by me. Motor control seems to be ...
-2
votes
2answers
118 views

how can i calculate if my motor can drive me uphill? [closed]

Well i'm building something on my free time and I want to buy an engine and I would like to know if it is strong enough to carry me uphill. Is there a formula i can use? This is what is know to me ...
1
vote
1answer
132 views

Running brushed universal motor at different frequency than designed

First, the end goal is to run a power tool (namely a Dewalt DW734 thickness planer) designed for 110V at 60Hz at a country where the power is 220V at 50Hz. The motor is a brushed universal motor, ...
1
vote
1answer
82 views

DC motor spun clockwise then counter clockwise creates AC current?

I am making a generator with a DC motor but the style of turning the rotor would be clockwise and then counter-clockwise, and I would want to capture as much current as possible so I hope it could be ...
0
votes
2answers
54 views

Which force moves the armature of an electric motor?

As I understood the tangential force F on a current-carrying conductor in a magnetic field makes the armature of a electric motor move. But actually the groove where the conductor is located in is ...
-1
votes
2answers
50 views

is it possible for a battry to provide to many watts to a dc motor [closed]

is it possible for a battry to provide to many watts to a dc electric motor. the motor is 36v 250w internal resistance is unknown, the battery is 3-12v 10a sla battries connected in series
0
votes
0answers
26 views

Help in choosing an electrical motor

As a dad to a newborn girl that calms down and falls asleep only when rocked vigorously in her crib or pram, I thought that it could be a nice idea to automate that process. I have a couple of ideas ...
2
votes
1answer
74 views

12V motor running with 24V L293D H-bridge

I have two 12V motors (300 RPM) running from a L293D H-bridge circuit. I find that the speed when I provide 12V is not satisfactory. Will it damage the 12V motors if I provide 18V or 24V? Will they go ...
1
vote
2answers
51 views

simple motor driver wouldn't work

I am using ATMega164PA as the microcontroller running at 8MHz on 3V coin battery (current battery voltage 2.5V). I am trying to turn on tiny coin vibration motor rated 3V, 90mA using ZXMN10A07FTA ...
1
vote
2answers
110 views

6V DC Motor Overheat

I am totally new to electronics, so be patient with me please, it is very basic question :) I have a 6V DC motor which I reused from an old device, that means I don't know its specs. I connected it ...
0
votes
1answer
42 views

What is meant constant voltage control of h-bridge

I am using LV8075LP as the h-bridge to drive small 3V, 90mA coin vibration motor. I came across a few terms that I need to understand. Constant voltage control Output full drive Also, can I use ...
0
votes
3answers
181 views

How to troubleshoot soldering issue?

I have circuit working perfectly on a breadboard - motors are spinning as expected. But same circuit with same components is not working when I soldered it - motors barely can spin (you hear buzz ...
2
votes
1answer
106 views

How does vibration motor create motion in particular direction?

I am building an autonomous robot for robot swarm reasonably small in size (say 30mm x 30mm). I was analyzing such robot's locomotion and found that coin vibration motors are used widely as opposed to ...
0
votes
0answers
65 views

How do I find power flow and shaft torque of induction motor?

A 50Hz induction motor has a synchronous speed of 3000 RPM. The motor has 2 poles and is initially running below the synchronous speed. An external force is applied and the motor is now rotated at ...
1
vote
1answer
85 views

Level Shifting & Amplification

I am trying to design a crane load (Weight) measuring unit using motor current measurement technique. For some reasons we can't use load cells here. Part of schematic I have drawn here An air core ...
4
votes
3answers
445 views

How does this H-bridge circuit work?

I am trying to repair an old radio-controlled toy car. It would only go backward, and forward movement would stutter. After some investigating, it turned out that one of the H-bridge NPN transistors ...
15
votes
3answers
1k views

Why do refrigeration compressors stall when switched off and on quickly?

All of the air conditioners I've worked with have the following words on them: Before restarting, wait three minutes. In the event the air conditioner's compressor is switched off and back on ...
0
votes
2answers
90 views

Battery voltage changing drastically after use

I have a NiCd 2000mAh 7.2V battery that drives two motors. If I run the motors for 30 seconds, the voltage reduces from 7.60 to 5V. Once motors are stopped, it takes a minute to come back to 7.50V at ...
-5
votes
1answer
47 views

how to select Dc Motor

I have air conditioning application where i want to run blower @ 1500 rpm. Motor is rated for 48-56v DC. The operation of motor is continuous mode. Let me know calculation involved here Minimum ...
1
vote
3answers
166 views

Best way to drop 12V fan to 7-9V? [closed]

So my Xbox one PSU died and microsoft doesn't sell official ones yet, so I bought a third party one and the fan that is in it is a 12V blower fan with 2 wires running right to the board (it says 12V ...
-1
votes
1answer
55 views

What is the lifetime of eccentric-weight haptic actuator? [closed]

Typically 40ms duration, few thousands times per day. What would be its life expectancy?
0
votes
2answers
70 views

Whats happening with my pond pump at reduced voltage? [closed]

So, I wanted to slow down my pond pump, and I have a variac or variable transformer that I used to reduced the voltage going to pump. I guess I probably needed to vary the frequency, not the voltage ...
0
votes
0answers
47 views

Drawing 2A from 1.5A source. What are the risks? [duplicate]

I have 220V to 12V converter with 1.5A output. My simple motor draws 12V and 2A. Are there any potential risks, when the difference is so small (besides motor being slower)? I cant figure out if ...
2
votes
6answers
753 views

How to create an electronically controllable resistance to a physical movement?

What is the best way to create an electronically controllable resistance to a physical movement? For example, at the gym you control the resistance to movement by putting more load, more weight. Is ...
3
votes
1answer
132 views

Controlling motor direction, usage and speed

I want to build a machine that can follow a set of simple rules by which it controls a motor. These rules are yet to decided, but the patterns are as follows: Turn motor clockwise for ...
0
votes
0answers
55 views

How to connect SINAMICS V60 driver to RaspberryPi

I have a Siemens motor with SINAMICS V60 driver (10A). Here is the Getting Started Manual (28MB PDF) . I want to connect this driver to the GPIOs of my raspberry Pi board. The purpose is to control ...
0
votes
0answers
77 views

Generating a Trapezoidal Motion Profile

I'm working on a project which involves the use of a servo motor to pull an object along a track. The servo motor will have a quadrature encoder to calculate the position. I'll probably implement this ...
0
votes
1answer
148 views

Supply voltage for MOSFET driver in high-voltage (110v) PWM regulator

I am designing PWM speed control for 110v DC motor. Since it is 110v, I am going to power it from bridge rectifier connected to mains, with MOSFET on low side for switching. For driving MOSFET I plan ...
0
votes
2answers
89 views

12 V relay instead of 9 V?

My RC car uses 2 relays (9 V, SPDT) for it's forward/backward movement, as image below indicates: However, RC car isn't able to be driven anymore. Specifically, servo works fine but motor can't ...
0
votes
1answer
205 views

Voltage increases speed/ current increase torque?

I don't understand how current reduces speed in an electric motor,while voltage increases it. Wouldn't a stronger magnetic field mean there is a stronger "force" thus should be a higher acceleration, ...
0
votes
2answers
96 views

Can I use pwm to control speed of at motor driver?

Ive got this motor driver from Sparkfun, https://www.sparkfun.com/products/9670. Where I get it that setting ENA and IN1 to high will enable connected motor 1 to og full speed in one direction. But, ...
1
vote
2answers
86 views

Get motor ratings from unknown DC motors

I've purchased bulk cheap DC motors for a robot problem. But I don't know their ratings. Is there a way for me to find out? For instance, I would like to know their max DC voltage input using basic ...
1
vote
1answer
92 views

Arduino Motor Shield overcurrent detection & protection

I have motor on my Arduino Motor Shield that draws <500mA when running and maximum 1A when stalled. I want to add some form of stall protection so that when the motor stalls the power is removed ...
0
votes
1answer
115 views

Motor Control For Overload

I am using PIC 18F45K80 for four phase dc motor control operation. The maximum load current is 30 Amps. If it exceeds 30 Amps, I have to call stop_motor() function in my coding in order to switch off ...
13
votes
7answers
1k views

Why are rectifiers-inverters used to drive AC motors instead of using the rectified current to drive DC motors?

I understand the advantages of using a rectifier-inverter system to drive an AC motor instead of simply plugging it into mains power, as it allows much better control of its speed and performance; but ...
0
votes
0answers
20 views

Infer the EMF amplitude of a generator from limited motor-mode data

Context: I am designing a very low speed alternator for small power devices, and I would like to select the correct motor for my application. The problem is, the cheap ones provide very little data - ...
0
votes
2answers
143 views

How do transistors work in a circuit? [duplicate]

I'm currently just getting involved with electronics, just bought an Arduino starter kit and am fiddling around with it. Currently i'm on a project which involves the use of a DC(spinning) motor in ...
0
votes
2answers
54 views

Considerations for a motor resisting a human grip

I'm trying to replicate this project at home, wherein strings attached to fingers and pulled by servos are used (instead of difficult pneumatics) to simulate an object in a glove as a version of ...
3
votes
2answers
451 views

How to move an object through 30 degree rotation? [closed]

I want to make an electronic bird feeder in which the feeder floor tips 30 degree down to exhaust the used seeds. I know how to work with PIC micro controllers to do the timing and enabling an output, ...
0
votes
2answers
78 views

Transistor Arduino Loss of Voltage

simulate this circuit – Schematic created using CircuitLab I have a wire connected to the base of the transistor that goes to the PWM pin 9 on the Arduino Uno. On the collector of the ...
1
vote
1answer
45 views

Motor rated 7.6AMPS. How will motor behave if driven with PWM controller with 4A output?

Firstly, I apologies for having to ask such a basic question. I'm looking to buy a controller for a permanent magnet motor. The specs of the motor are: 200VDC, 1.5HP, 5700RPM, 7.6A, form factor: 1.0 ...
2
votes
2answers
259 views

DC Motor as DC Generator + Output Polarity Switcher

I am working on a hobby circuit. And got a quick question. I am using regular mini DC Motor as DC Generator. If the motor is rotated one side it generates few volts. If the motor is rotated in ...
2
votes
3answers
188 views

How to make two motors spin at the same speed?

I am currently using two identical motors to drive a robot. The motors are both controlled using relays but one of the motors is spinning faster than the other. How can I slow down the faster motor ...
2
votes
1answer
110 views

Understanding current readings from a multimeter

If you couldn't guess, I'm new to electronics. So, I've just received my 3V air pump, it didn't come with any specs, so I'm trying to figure everything out. I hooked it up to a DC variable power ...
1
vote
1answer
249 views

48V PWM Motor Controller

I considering doing an electric Go-Kart project with two direct drive rear 48v motors (considering two of these). I plan to control it using Arduino PWM pins. However, I am not sure of the route to go ...
0
votes
1answer
123 views

Drive a DC motor rated for higher than 5V

How would I go about if wanted to drive a 10V DC motor with 5V logic, suuch as the one found by an Arduino, at different rotation speeds? Is there such thing as a motor driver that accepts an ...
0
votes
1answer
175 views

XY table using motorized potentiometers

I'm trying to implement a XY table using 4 units of these motorized potentiometer, controlled by an Arduino. Since I have other uses in mind, I'd like to use as few pins as possible, wich would imply ...