All Questions
21
questions
1
vote
2
answers
87
views
Driving 12V hand wound solenoid using PWM
I'm trying to drive a hand wound solenoid (140 turns of 0.8mm enamel copper wire, 4cm long) with a 12V/2A power supply. I need to control the intensity of the force generated by the solenoid, so I'm ...
0
votes
2
answers
112
views
Solenoid fails under PWM control
I have a 12V solenoid rated at about ~6W and 40kg pull.
I am controlling it using ESP32, IRLB8721PBF logic-level mosfet.
MOSFET gate-gnd is also connected using 0.5W 5.6V zener diode.
ESP32-gate is ...
- 11
1
vote
1
answer
270
views
Using a SSR for passing a DC PWM Signal that has positive and negative waveform
I am trying to control the PWM signal to a solenoid via an SSR by passing one leg through it to control the on/off.
I have tried 3 different SSR's and none of them fully stop the signal, I still get a ...
- 11
1
vote
3
answers
2k
views
PWM-controlled current source to drive a 24 V proportional solenoid valve using an Arduino
I would like to implement a PWM-controlled current source to drive a 24 V proportional solenoid valve using an Arduino.
What I need:
Input will be 5 V PWM with 5000 Hz frequency, duty cycle will ...
- 11
3
votes
1
answer
239
views
Running multiple solenoids with a seemingly "weaker than it should be" PSU
I work part-time at a piano maintenance center as an electronic engineering student. We receive quite a few self-player piano systems and recently, we got a big Steinway & Sons piano, a very ...
- 31
0
votes
1
answer
1k
views
The optimal PWM frequency of this proportional solenoid
I have to PWM control this proportional solenoid particularly "GP8 036 A59/150" that works on 12V. I tried from 200Hz to 20kHz - it seems that it accepts any PWM frequency with no overheat ...
- 31
1
vote
1
answer
295
views
Scale up current of a pick and hold solenoid drive IC
I am trying to help to salvage a design that doesn't meet a new specification.
Circuit needs to drive a solenoid in relatively common fashion: High current pulse to actuate followed by reduced hold ...
- 714
0
votes
1
answer
947
views
Use DC Motor driver for electromagnet
I need to control the force exerted by an electromagnet using an MCU. it's not a commercial item so I don't have any datasheet.
Here what I know:
resistance: 8,9 ohm
may be powered up to 60V (with ...
- 1,235
1
vote
1
answer
205
views
Two pin PWM signal to control solenoid/electromagnet
I am building a whiteboard CNC pen plotter for my classroom out of some old 3D printer parts, a Melzi board running Ramps 0.92 and Inkscape to generate the Gcode. I have the machine up and running but ...
- 11
0
votes
0
answers
123
views
Control flow rate of a solenoid valve using PWM
I'm hoping to control the flow of chemical by shutting a solenoid valve periodically over short intervals, similar to this video: https://youtu.be/O49mqn33vBI?t=6
Does anyone know if conventional ...
- 893
1
vote
1
answer
870
views
MOSFET for PWM control on a solenoid
I’m currently working on a project where I am utilizing PWM on an Arduino to control a solenoid proportionally. I am designing a device that will play the piano. I would like it to mimic hand ...
- 11
1
vote
1
answer
100
views
PWM that can handle rapid on and off cycles?
I am working on a prototype project with a large electromagnetic solenoid. I want to be able to vary the strength of the solenoid via a PWM (preferred), or constant current.
The issue I’m having is ...
- 11
2
votes
2
answers
258
views
Magnetic force as a function of PWM frequency
Consider an experiement with a DC source feeding an coil with a constant DC current I. The coil with an iron core attracts a magnetic plate with mass m with force F. The force F is higher than Fm and ...
- 31
0
votes
2
answers
522
views
How to convert 0-3 V (PWM range) to 0-24 V (device voltage requirement)
I have an Arduino with some PWM pins, output range is 0 to about 3 V and I need 0 to 24 V range.
I need to active a solenoid - a hydraulic proportional solenoid
A 12V and 5V source is also ...
1
vote
1
answer
139
views
Why does a Solenoid driven with intermittent duty cylce produce higher force than with continuous drive?
I'm selecting some solenoids with my MechE and I noticed something that I didn't have an intuitive explanation for.
We were looking at this solenoid and noticed that at the bottom the forces ...
