An electrical actuator converting electrical energy into rotational motion.

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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
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3answers
153 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
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2answers
67 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
737 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
127 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
47 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
70 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
133 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
85 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
147 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
90 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
74 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
83 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
114 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
125 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
53 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
445 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
74 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
246 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
176 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
105 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
218 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
120 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
148 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 ...
0
votes
1answer
103 views

Multiplexing 4 DC motors with arduino

I'm aiming to control 4 motorized faders with an Arduino. However, I'm still trying to figure out how to best multiplex all the inputs/outputs. Each fader has two potentionmeters and one touch ...
0
votes
3answers
265 views

RPM counter using 8051 microcontroller

I am building a RPM measurement unit using 8051 micro controller. I want to measure RPM of AC motor. I have connected proximity sensor to get the pulse for each turn. I have connected the proximity ...
4
votes
2answers
228 views

How can the Arduino Uno support up to 12 servos if it only has 6 digital PWM pins?

According to this: The Servo library supports up to 12 motors on most Arduino boards and 48 on the Arduino Mega. On boards other than the Mega, use of the library disables analogWrite() (PWM) ...
4
votes
2answers
303 views

Does a multi-speed fan operate at a different wattage at different speeds? [closed]

This question has been phrased to be a non-use, theoretical question on electrical design, as it has always been intended. Note to moderators: please be careful editing or re-phrasing to reduce the ...
1
vote
1answer
47 views

Is it possible to use 2 relays instead of a DC motor controller?

I have been for motor controllers to control two 12V motors that have a stall current of 130A and at max power (expected operation) will draw 68A. I am having trouble finding low cost motor ...
0
votes
3answers
135 views

Motor PWM Controllers Too Good to be True

I am working on a project which involves driving 2 high power 60amp stall 12v motors from an arduino. I had been browsing available drivers, and everything on the market seems to be quite expensive ...
0
votes
3answers
171 views

Is It Safe To Apply 24V Across a 12V Motor?

I am trying to determine if it is safe to apply 24V across a 12V rated motor. I am working on a robot that weighs approximately 150lb and has a friction intensive drive system. I believe the motors ...
0
votes
2answers
103 views

Stepper motor stalls at low frequencies. Why?

I picked up a Howard Industries 1-19-4200 (5 wire) stepper and have been driving it on my testbench with a PIC18F2550 and L293D. I recently added a potentiometer to an analog pin of the PIC for speed ...
-1
votes
1answer
61 views

Sharing the Seeeduino LiPo with a motor controller

I'd like to use a Seeeduino to control a small DC motor to wind/unwind a thin cable which will be lifting a small door. Ideally, I'd like to use the same LiPo that's being used to power the ...
0
votes
1answer
66 views

What is the torque of motor when dead weight added to the shaft? [closed]

How to calculate the torque of motor when external dead weight (say 70Kg) is hanged over motor shaft? How to find the starting of motor?
0
votes
1answer
112 views

Surge Protection for pump relay

I have a 24 volt relay that starts a 220 volt pump motor for a sprinkler system. The relay and pump are about 800 yards from the 24 volt signal generator. I have had four relays go bad and fail. I ...
0
votes
1answer
81 views

DC 5 Volts - 2100mAh Electric Motor Generator. How?

I have spent my entire weekend trying to locate a place where I can buy a 5 Volts - 2100mAh Electric Motor/Generator. My goal is to spin this motor up to a certain RPM to generate the 5 volts and ...
2
votes
2answers
98 views

Using a motor as a generator: How fast does it need to rotate?

I have a dc motor with the following specifications: ...
2
votes
3answers
228 views

Four-contact push-button switch; what's the pictured switch called?

I have single phase submersible pump, around 400 foot underground in a Bore-well and its controlled by the controller shown below. The green button is a push-button switch which if pushed and held ...
0
votes
1answer
63 views

Why does my PWM Arduino loop not working as intended?

I have a Arduino sketch I am trying to use to control a DC motor using PWM. It seems it it just running the motor as if I the PWM was set to 255 (100%). I intend for my sketch to start the motor ...
1
vote
2answers
88 views

How does a CD-ROM rotor know when to stop the moving plate?

I need to make a mechanism with a RaspberryPi like in CD-ROMs, so I can easily move a plate from the minimum position (CD-Rom closed) to maximum (CD-ROM open). I have a DC motor (from CD-ROM) and I ...
0
votes
2answers
115 views

Can the output of two 15-amp motor drivers be hooked up in series to achieve a 30-amp tolerance?

I had a cheap 15-amp motor driver that I bought on eBay. You can see product details here. I was planning to use this motor driver to power my robot, which uses two 24v wheelchair motors. Then I ...
0
votes
1answer
164 views

L298N damaged? What to do?

I'm trying to control a DC motor with the L298N motor driver and it worked for a brief moment. I've used the setup mentioned in this video tutorial, but someone in the comments said that with this ...
0
votes
2answers
138 views

How do amps affect RPMs?

I bought a replacement pellet stove auger motor rated at: 120V, 0.51 amp, 1 RPM. (ASIN: B0032D26I6). I installed it into the stove and it works, but the feed rate ...
0
votes
1answer
228 views

How can I limit the current in a 12v car battery to be safe for my 25a motor driver?

I have a 25amp Sabertooth Motor controller that can be powered by my 12v car battery. I have big 24v wheelchair motors attached to the motor controller. I do not know how much current that the motors ...
0
votes
1answer
143 views

Will motors cause more noise when connected to a ground plane instead of directly to batteries?

I am making a small robot using an Arduino and two servo motors. There are two ways that I can provide power to the motors: 1) Run power and GND wires from the battery holder to the motors, then ...