Method to adaptively control and derive the control voltage...

Details Method to adaptively control and derive the control voltage... Method to adaptively control and derive the control voltage...

2005-05-03

2005-05-03

Von Buhr, Maria N. (Department: 2125)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Mechanical control system

C251S129180

Reexamination Certificate

active

06889121

ABSTRACT:
The invention provides a computer implemented method to automate the calibration of the drive voltage waveform of a solenoid operated valve. An initial estimate of valve electromagnetic parameters and valve closure point is derived and the drive voltage waveform is created based in part on circuit constraints and the parameters and valve closure point. The drive voltage waveform is applied to the valve coil and the coil current feedback is obtained and used to update the initial estimate. This process is repeated until the coil current feedback meets predetermined criteria. The electromagnetic parameters include the L/R ratio of the valve during the pull-in time and decay time, the valve back emf during the pull-hold time, and the average resistance during hold when current is steady. The closure point is used to anchor the drive voltage waveform and is adjusted at a slower rate than the other parameters.

REFERENCES:
patent: 6397655 (2002-06-01), Stephenson
patent: 6418003 (2002-07-01), Xiang
patent: 6560088 (2003-05-01), Beck et al.
patent: 6565064 (2003-05-01), Smith et al.
patent: 20020134956 (2002-09-01), Smith et al.
patent: 20040155121 (2004-08-01), Watanabe et al.

Affiliated with

Also associated with

Rating

Method to adaptively control and derive the control voltage... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method to adaptively control and derive the control voltage..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method to adaptively control and derive the control voltage... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3443639