How to control a DC motor with pressure?
How to control a DC motor with pressure?
(OP)
Hi guys, Im new to the forum. The lay out of this board is new to me so I apologize in advance for not performing a search and introducing myself in the proper forum. I'm a Journeyman Electrician of 5 years and a sophomore in college majoring in Electrical Engineering. That about sums up me. On to my question.
I am currently working with local race shop to develop an independent oiling system, with a broad application, that is capable of maintaining a static 35-45 psi. This is the pump they have selected: http: //www.rbra cing-rsr.c om/partnum bers.htm#o ilscavenge it is located at the bottom of the page, the "standard" size. It is a 12v dc brush motor driving a gear pump. We did a test today and the pressure was way too high. With a 10w-30 oil at 75 degrees F, the pressure was roughly 95 psi. At 220 degrees, the pressure dropped to around 50 psi. We want to hold around 35-45 psi and planned on doing so using a user controlled pulse width modulator. Could we use some type of pressure to voltage transducer to control the pulse width modulator? Or is there a controller that could do all of this for us? Preferably this would all be analog and of course, the cheaper the better. Reliability is the important part though.
Thanks in advance for all of the help.
I am currently working with local race shop to develop an independent oiling system, with a broad application, that is capable of maintaining a static 35-45 psi. This is the pump they have selected: http:
Thanks in advance for all of the help.





RE: How to control a DC motor with pressure?
Start notor at nominal speed
Slow motor to some minimal speed
Count time till pressure drops and switch opens
If over a certain time increase PWM / motor speed or drop if over
A fluid accumu;ator would help. There are tons of features you could add. The development system is free and you can get started for less than $20. Time to learn some software development before the world passes you by. Too bad an automotive oil switch is only about & psi. At some point you could move to your own board.
RE: How to control a DC motor with pressure?
Bill
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"Why not the best?"
Jimmy Carter
RE: How to control a DC motor with pressure?
OperaHouse, thanks for the input, the Arduino is basically plc with pwn capabilities? The pressure switch you are referencing, are you suggesting that be the minimal pressure desired, 35psi? Are the channels on the board robust enough to handle the current this motor will draw? What is the FET used for? Sorry for the rookie questions, I really havent been exposed to this stuff in college yet. I'm only going off of the knowledge gained through the electronics and controls classes I had to take as an electrical apprentice. I have had a few quarters of c++ programming though at school. I appreciate the patience.
RE: How to control a DC motor with pressure?
If you want to impress your friends you may try calling the relief valve a "Hydraulic-mechanical proportional controller with an ultra narrow, tamper proof, proportional band".
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: How to control a DC motor with pressure?
RE: How to control a DC motor with pressure?
OperaHouse, your saying that the FET's would be hooked up to the output of the Arduino, correct?
RE: How to control a DC motor with pressure?
If you don't do this by yourself, you will never know if you are any good. And you will never be any good if you don't know you are.
Bill Murray, Get Low
RE: How to control a DC motor with pressure?
RE: How to control a DC motor with pressure?
RE: How to control a DC motor with pressure?
Sorry for the off-thread answer here!