Pulse Modulation

D

Thread Starter

Dave van Rhijn

Dear members,

PWM - Pulse Width Modulation on logic controllers?

Useful?
More useful or successful than simple analogue signal control?
What are the applications different manufacturers may use this for?

Dave van Rhijn
 
A

Audun Alvestad

Hi there!

PWM seems meaningless at first but I am actually using this as a feature in my regulation system.

My system monitors and supply the oxygen for fishfarms. By using PWM on the valves that regulates the O2 supply you will get a very good regulation. Why doesn't you use prop.vents you may ask, MONEY?

Typical system for fish farming have 20-30 regulation points. prop.vent costs the tripple of ordinary magnetic valves and the costs of analog output the same.

Basic: PWM reduses the costs to 1/3!!!!!

I'm using Moeller PLC
 
H

Heavner, Lou [FRS/AUS]

Dave,

First thing that comes to mind is resistance heaters. Possibly some stepper motors or motorized valves are designed for PWM.

Regards,

Lou Heavner
Emerson Performance Solutions
 
B
We use PWM to directly drive hydraulic proportional valves to control speed and
position. This eliminates the need for an analog output and valve driver board.
You can also make a reasonably good unipolar analog output by low pass filtering the pwm.

Bill Marsh
Integrated Controls
 
T

Tycon Automation pvt.

we're using pwm for temperature control
in plastic moulding.

gaurov
Tycon Automation pvt. ltd.
201, sethi bhawan
7, rajendra place
new delhi 110007
 
Top