Electronic controller for linear cryogenic coolers

Details Electronic controller for linear cryogenic coolers Electronic controller for linear cryogenic coolers

1995-11-29

1998-05-19

Wayner, William E.

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

622281, 62230, 361 24, F25R 900, H02H 504

Patent

active

057523851

ABSTRACT:
A highly efficient motor driver circuit of an electronic controller for linear cryogenic coolers operates directly from a variable power supply, such as a battery, without the need for the voltage regulator control circuit of the prior art. Elimination of the prior art voltage regulator ensures a higher efficiency motor driver circuit of the electronic controller. Both open-loop and closed-loop controllers electronically control the motor driver circuit. The open-loop controller protects against temperature sensor failure, and will limit maximum motor power as a function of system ambient temperature. The closed-loop controller regulates the temperature of the cold finger accurately to a preset value, using feedback from a temperature sensor along with a novel pulse-width modulation concept for modifying motor drive waveforms. The motor driver circuit provides the advantages of increased efficiency, operation from a variable power source, tight control of temperature regulation, a fail-safe mode of temperature sensor feedback, and a small envelope space enabling electronic controller mounting internal to the cooler motor/compressor assembly of a linear cryogenic cooler.

REFERENCES:
patent: 4361011 (1982-11-01), Callender et al.
patent: 5018357 (1991-05-01), Livingston et al.
patent: 5531074 (1996-07-01), Katagiri et al.
patent: 5572879 (1996-11-01), Harrington et al.

Affiliated with

Also associated with

Rating

Electronic controller for linear cryogenic coolers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic controller for linear cryogenic coolers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic controller for linear cryogenic coolers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1844622