CA2186306A1 - Electronic Controller for Linear Cryogenic Coolers - Google Patents

Electronic Controller for Linear Cryogenic Coolers

Info

Publication number
CA2186306A1
CA2186306A1 CA2186306A CA2186306A CA2186306A1 CA 2186306 A1 CA2186306 A1 CA 2186306A1 CA 2186306 A CA2186306 A CA 2186306A CA 2186306 A CA2186306 A CA 2186306A CA 2186306 A1 CA2186306 A1 CA 2186306A1
Authority
CA
Canada
Prior art keywords
driver circuit
electronic controller
motor driver
loop
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2186306A
Other languages
French (fr)
Other versions
CA2186306C (en
Inventor
Arthur Randall Nelson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northrop Grumman Guidance and Electronics Co Inc
Original Assignee
Litton Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Litton Systems Inc filed Critical Litton Systems Inc
Publication of CA2186306A1 publication Critical patent/CA2186306A1/en
Application granted granted Critical
Publication of CA2186306C publication Critical patent/CA2186306C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/001—Gas cycle refrigeration machines with a linear configuration or a linear motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/14—Compression machines, plants or systems characterised by the cycle used 
    • F25B2309/1428—Control of a Stirling refrigeration machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle

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 batter, 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.
CA002186306A 1995-11-29 1996-09-24 Electronic controller for linear cryogenic coolers Expired - Fee Related CA2186306C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/563,938 1995-11-29
US08/563,938 US5752385A (en) 1995-11-29 1995-11-29 Electronic controller for linear cryogenic coolers

Publications (2)

Publication Number Publication Date
CA2186306A1 true CA2186306A1 (en) 1997-05-30
CA2186306C CA2186306C (en) 1999-07-20

Family

ID=24252512

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002186306A Expired - Fee Related CA2186306C (en) 1995-11-29 1996-09-24 Electronic controller for linear cryogenic coolers

Country Status (6)

Country Link
US (1) US5752385A (en)
EP (1) EP0778508B1 (en)
JP (1) JPH09222357A (en)
KR (1) KR100426509B1 (en)
CA (1) CA2186306C (en)
DE (1) DE69608529T2 (en)

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US6505475B1 (en) 1999-08-20 2003-01-14 Hudson Technologies Inc. Method and apparatus for measuring and improving efficiency in refrigeration systems
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KR20050058363A (en) * 2002-08-20 2005-06-16 스미도모쥬기가이고교 가부시키가이샤 Very low temperature refrigerator
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US7266947B2 (en) * 2004-04-15 2007-09-11 Sunpower, Inc. Temperature control for free-piston cryocooler with gas bearings
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US7628028B2 (en) * 2005-08-03 2009-12-08 Bristol Compressors International, Inc. System and method for compressor capacity modulation
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US20070089436A1 (en) * 2005-10-21 2007-04-26 Abtar Singh Monitoring refrigerant in a refrigeration system
US7665315B2 (en) * 2005-10-21 2010-02-23 Emerson Retail Services, Inc. Proofing a refrigeration system operating state
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Also Published As

Publication number Publication date
KR970028268A (en) 1997-06-24
EP0778508A2 (en) 1997-06-11
DE69608529T2 (en) 2001-01-18
CA2186306C (en) 1999-07-20
JPH09222357A (en) 1997-08-26
KR100426509B1 (en) 2004-07-01
DE69608529D1 (en) 2000-06-29
US5752385A (en) 1998-05-19
EP0778508B1 (en) 2000-05-24
EP0778508A3 (en) 1998-04-01

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Legal Events

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MKLA Lapsed

Effective date: 20150924