Questions tagged [actuator]

An actuator is a device for converting energy into motion. They may be pneumatic, hydraulic, electric, or mechanical.

Filter by
Sorted by
Tagged with
0 votes
0 answers
25 views

How to Calculate Driver Input Current from 3-Phase Motor Data

I have a driver that is able to monitor the following motor parameters as functions of time: Reactive Current Active Current Phase Voltage (all 3) RMS Voltage The RPM is fixed and the I know the ...
user avatar
1 vote
1 answer
55 views

What is the PE in 4P+PE connector mean?

I'm wiring a valve actuator to a connector for quick-disconnect purposes. The actuator has five wires so I thought of getting a connector that says 4p+PE, however I was told that 5p was needed. I'm ...
user avatar
  • 33
1 vote
1 answer
47 views

Low side driver and flyback diode

I wanted to control electric door lock (12V, 1.5A peak, unlocking time < 200ms) with Self-Protected Low Side Driver like NCV8412 (https://hr.mouser.com/datasheet/2/308/1/NCV8412_D-2317556.pdf). One ...
user avatar
  • 19
2 votes
2 answers
74 views

Protecting small DC motor (power door lock actuator) from burning out due to stall

This question of small DC motor burnout due to heat/stall has been asked in a few different ways/scenarios already, so I think I have a basic understanding of what the issue is -- I'm interested in ...
user avatar
  • 43
1 vote
1 answer
45 views

Need some help with design for reduced friction acceleration of a ferromagnetic mass through a barrel

I would like to levitate (by that I mean just enough to not make contact with the surface of the barrel) and accelerate a ferromagnetic mass along a barrel of a certain length. I have a few questions ...
user avatar
  • 11
0 votes
0 answers
31 views

Relay to drive actuators

wanting to use 240v AC motor controller to drive a DIY TV lift that uses DC actuators. The AC controller has Neutral, L1 and L2 outputs. Will it work if I… Wire 240v AC L1 and L2 outputs to each side ...
user avatar
0 votes
2 answers
61 views

Small actuators/motors to generate low frequency vibrations

I am a beginner in vibration technology, and I am interested in making a wearable device that delivers low-frequency and low-amplitude vibrations to the user's wrist. All of the motors I have found ...
user avatar
2 votes
1 answer
190 views

How does this pentode power amplifier (old technology, 1960s) work?

This is a diagram of a pentode power amplifier: This amplifier is used to control an electro-pneumatic actuator. Let me describe it a little bit: the input voltage (the control signal) is V3 (-30V &...
user avatar
  • 449
0 votes
2 answers
83 views

Quasi Direct Drive Actuator - Slot & Pole Combinations for High Torque Motor

I am building my own Quasi Direct Drive actuator and looking for information/ design guidelines for building a High Torque Motor similar to the MIT Mini Cheetah below. Specifically I cannot seem to ...
user avatar
1 vote
1 answer
100 views

How to choose the right MOSFET?

I am looking to use a MOSFET to switch a linear actuator on and off. There's nothing else on the circuit, just the switch and the actuator (and a Raspberry Pi to control the switch.) The actuator ...
user avatar
0 votes
2 answers
94 views

How does negative feedback control system begin to work fast

Let us consider an open loop system, which has some value of bandwidth. Now, when the loop is closed via negative feedback, the gain of the system reduces and the bandwidth of the system increases. ...
user avatar
  • 156
1 vote
0 answers
166 views

Linear actuator is not working with BTS7960

I am trying to run a linear actuator with a BTS7960 motor driver and an Arduino UNO. The code seems fine, wiring seems fine but after uploading the code, the linear actuator does not start. I am using ...
user avatar
  • 23
0 votes
1 answer
84 views

Code misbehaviour when linear actuator to the circuit

I have a circuit meant to operate an actuator in function of the temperature. The code has been tested and, as long as the actuator is not connected, it does what it is meant to do (tried simulating ...
user avatar
-1 votes
1 answer
95 views

Does "rated torque" (kg.cm) directly apply to "lead screws"? [closed]

I am making a project that requires driving nuts through threaded rods. I keep seeing different numbers for kg.cm and N.m, the explanation kg.cm found on this Stack emphasized only on radial distance, ...
user avatar
0 votes
0 answers
35 views

0-10V control signal for valve actuator from -10/10V DAC

I'm trying to control a valve actuator (24VAC power) that uses a 0-10V voltage input signal which only uses one wire, with a USB multifunction board which has a +-10V DAC control output which uses two ...
user avatar
1 vote
0 answers
134 views

How do I find the best DC motor for my rack and pinion system?

I need enough electric power to produce about 0.289 Nm with a rack and pinion system and compress 24 mm of a 110 mm x 21.6 mm, 0.99 N/mm steel spring. What I have so far is that for a 10mm pitch ...
user avatar
  • 53
0 votes
0 answers
43 views

How to control a piezoelectric actuator programmatically?

How can one control a piezoelectric actuator programmatically (e.g. with a 3.3. Volt digital signal from a Raspberry Pi or any other method you recommend)? The goal is to be able to output an ...
user avatar
0 votes
1 answer
77 views

Square wave from high voltage power supply (5kV)

I working on a project involving dielectric elastomer actuators and need to generate a square wave from a 5kV power supply (SRS PS350). The operating frequency will be 0-50Hz. What's one circuit I ...
user avatar
  • 1
-2 votes
1 answer
71 views

DC motor remote control with one push [closed]

I am planning to use 2 actuators as a gate opener. The linear actuators are hooked to a DC motor controller, with remote, so I can open/close the gate by either press and hold one of the two buttons ...
user avatar
  • 15
0 votes
1 answer
28 views

Map arm movement (as plant) to lidar-measured distance (as setpoint) using PID

I am trying to control the arm of my setup such that its tip is at a particular distance from the surface. That's when its supposed to stop. The actuator has no feedback, so I use a 1D LiDAR to ...
user avatar
  • 113
0 votes
0 answers
72 views

Controlled solenoid stroke length

Let me create a scenario to better illustrate the problem I have 1500 pens that I want to individually actuate upwards with 3 different distances, ex: 10mm/15mm/20mm I thought I could use a solenoid ...
user avatar
0 votes
0 answers
45 views

Insight on backup safety feature for linear actuator using NEMA stepper motor in commercial product?

I am of intermediate skill level with electronics and hardware. I am working on a linear actuator concept prototype with a partner that we plan to iteratively develop and eventually take to market for ...
user avatar
0 votes
1 answer
135 views

2 Relay H bridge design

I am wanting to design an H bridge to control a linear actuator. 12vdc motor, max current 3.2A under load, and has built-in travel limit switches (ie motor stops at full extension and retraction). ...
user avatar
0 votes
0 answers
38 views

Linear motion (quiet, variable speed)

I want to use a raspberry pi or arduino to create linear motion, back and fourth, my current goal is to make the pushing part for a baby rocker, but also a swing-rocker as a next project I have looked ...
user avatar
  • 101
0 votes
3 answers
300 views

How do i know what resistor value, that's attached to a BLDC motor, i should use in order to get a torque of 100 lb-ft put on my actuator?

Motor P/N is M-3441Y-LN-02D. Back EMF [Ke] is 38.95 (Vpeak/Krpm). Continuous torque 2.495 lb-ft. User manual. I want to run the actuator coupled with the BLDC motor 60:1 gear ratio in reverse. So the ...
user avatar
  • 1
1 vote
2 answers
84 views

Aren't actuators mechanical devices, and so aren't they part of the mechanical system?

I am currently studying Mechatronics: Electronic Control Systems in Mechanical and Electrical Engineering, seventh edition, by William Bolton. Chapter 1 Introducing Mechatronics has the following ...
user avatar
  • 1,201
2 votes
2 answers
803 views

ADC Measure from source with higher voltage and different ground

I would like to measure the voltage of a battery that varies from 4,5V to 3V. To do so I'm planning to connect this source to a STM32F4 DISCO board and one of its ADCs, which will be set to a VREF+ of ...
user avatar
1 vote
2 answers
2k views

Please Help with Syncing 2 Linear Actuators

I am a complete noob in regards to electrical wiring and scoured countless hours on the internet for help. I bought 2 DC12V 16inch Stroke Linear Actuators and connected it with a 20 AMP 12V - DC Motor ...
user avatar
  • 13
2 votes
1 answer
5k views

Do I need to put a resistor in series with relay coil?

I need to design a circuit to drive a relay and I have some doubts. Do I need a resistor in series with relay coil, I mean, between transistor and relay coil ? Why I always find relays with 12V, ...
user avatar
  • 847
1 vote
1 answer
54 views

Electromagnetic actuator – extension of field beyond coils?

In an electromagnet with an iron or similar core, how far down that core, beyond the coil, will the rod be magnetic when the coil is energized? I'm wondering if I can create an actuator for an object ...
user avatar
1 vote
2 answers
203 views

How to calculate the number of cycles my linear actuators can run

I've recently bought a set of linear actuators for a personal project of mine and I was wondering how many times can this linear actuator run before my battery runs out. (My battery is rated 12V, ...
user avatar
  • 160
-1 votes
1 answer
301 views

DC Motor - need replacement [closed]

Ok I’m am hoping someone can help me. THREE of my 4 door locks stopped working. Dealer quotes me $500 (parts, labor, tax) or $200 (parts, tax). Quote to myself to fix FC-280ST-16200 KD603713 ...
user avatar
0 votes
1 answer
317 views

Linear Actuator using Relays, MOSFET, and PWM

I have a 29V Linear Actuator that I want to control - both direction and speed. For the direction I used this 4-channel relay module, but I only used 2 relays on it. I was able to successfully ...
user avatar
0 votes
1 answer
488 views

How BLDC motora coils and magnets are mechanically arranged

I've read some articles about how BLDC motors principle (in my case 3-phase) with something also about linear BLDC. This documents talks about actuation and theory. But looking at drawings I became ...
user avatar
  • 367
0 votes
0 answers
100 views

Capacitance calculation of comb-drive actuator

I just want to make sure that I am performing this calculation correctly... From this COMSOL study, I gathered the following info... $$C_t = N\frac{\varepsilon_o\varepsilon_rl_ot}{d}$$ $$C_f = \...
user avatar
  • 165
0 votes
1 answer
50 views

simple design for mechanized home automation devices to stop at limits [closed]

can you point me to any existing designs or ideas for simple DIY type mechanism to ... for example... roll up/ roll down a motorized movie screen and stop when it gets to some specific limits. i ...
user avatar
0 votes
3 answers
144 views

What is the current limit of driving a linear actuator for 4 VDC at 12 VDC?

Please bear with me, if this is a stupid question. I obtained a linear actuator of a family of linear actuators, here are the specs ...
user avatar
  • 103
0 votes
1 answer
95 views

Can servos have a true neutral gear?

I am developing a mechanical arm that can be pitched remotely at a certain angle using a high-torque servo motor. The servo needs to keep the arm at a precise position for any give amount of time and, ...
user avatar
1 vote
3 answers
460 views

How to make linear actuators go in both directions? (Using arduino/microcontroller)

I'm stuck here, I want to make the lineal actuators to go up and down, both of the actuators move to the same direction at the same time. The arduino receives a signal as input and then the ouptut ...
user avatar
0 votes
2 answers
357 views

How should I make a constant AC current source to drive an electromagnet?

The inductance of the electromagnet is about 0.05H and the resistance is under 50 Ohm and I need about 2 to 5 Amperes to drive it. I need to be able to change the amplitude and also the frequency at ...
user avatar
0 votes
3 answers
735 views

micro-switch 12V DC use in vehicle?

Using 12V DC (max 3 amp) linear actuator in a standard car, I need to use some micro-switches in the power circuit to prevent the actuator powering, if it's not in the correct position i.e. won't ...
user avatar
0 votes
1 answer
99 views

magnetic actuator torque calculation

I would like to formulate how much load can carry for the magnetic actuator used in RC airplanes. Example photo: It consists of a coil and a magnet. And works according to lorentz force principle. ...
user avatar
0 votes
0 answers
39 views

Which power supply choose for lineal actuators?

I have two actuators each of them with the following characteristics: 16 inch, 12v, load 750 N, travel speed 10mm / s, duty cycle 25% BUT Current Draw is not specified, and I have no access to the ...
user avatar
1 vote
4 answers
420 views

Brushless motor design with additional separation layer at the air gap

As a thought experiment, I was thinking about how to actuate an passive impeller inside a tube from outside, contactless. Imagine a tube equipped with an impeller inside it. The impeller is mounted in ...
user avatar
  • 113
1 vote
1 answer
99 views

Loading an Asynchronous Generator

I am doing an experiment that involves loading an asynchronous 50 HZ generator. For the load to consume current it has to be a capacitive load to cause a phase shift between the current and the ...
user avatar
  • 13
0 votes
1 answer
97 views

Linear actuator. Monitor end switch with arduino

For a hobby project I am developing a solar tracker. For this I obtained a linear actuator. It contains a DC motor, 2 Hall sensors and an end switch. I am using an Arduino Uno and a Polulu motor ...
user avatar
0 votes
1 answer
349 views

Transfer function_Approximation of second order system for a linear actuator

I am trying to approximate a transfer function of a system. The system is a linear actuator, connected to a feedback potentiometer. The actuator has a mass on it. The following figure is a step ...
user avatar
  • 101
1 vote
1 answer
265 views

How do memory seats keep track of their position?

I was wondering how do memory seats keep track of their position. Since this kind of equipment existed in 1990's cars, it must be simple yet ingenious. I have been thinking about this for quite a time ...
user avatar
  • 11
0 votes
2 answers
423 views

How to get stall current from DC motor model

I'm studying the model of a dc motor from this link : http://ctms.engin.umich.edu/CTMS/index.php?example=MotorSpeed&section=SystemModeling The equations are: \$\ s(Js+b)\theta(s)=K I(s)\$ \$\ (...
user avatar
  • 33
0 votes
1 answer
93 views

modeling of a dc motor with load

I designed a robot. It consists of an actuator, linkage and a camera. the actuator is considered as a dc motor in this problem. I need to identify this system. how can I find a model for actuator and ...
user avatar
  • 101