CA2374407A1 - Direct current motor safety circuits for fluid delivery systems - Google Patents

Direct current motor safety circuits for fluid delivery systems Download PDF

Info

Publication number
CA2374407A1
CA2374407A1 CA002374407A CA2374407A CA2374407A1 CA 2374407 A1 CA2374407 A1 CA 2374407A1 CA 002374407 A CA002374407 A CA 002374407A CA 2374407 A CA2374407 A CA 2374407A CA 2374407 A1 CA2374407 A1 CA 2374407A1
Authority
CA
Canada
Prior art keywords
voltage potential
safety circuit
driven device
power line
controller
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
CA002374407A
Other languages
French (fr)
Other versions
CA2374407C (en
Inventor
Sheldon B. Moberg
James D. Causey, Iii
Herman Lee Renger
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.)
Medtronic Minimed Inc
Original Assignee
Minimed Inc.
Sheldon B. Moberg
James D. Causey, Iii
Herman Lee Renger
Medtronic Minimed, 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 Minimed Inc., Sheldon B. Moberg, James D. Causey, Iii, Herman Lee Renger, Medtronic Minimed, Inc. filed Critical Minimed Inc.
Publication of CA2374407A1 publication Critical patent/CA2374407A1/en
Application granted granted Critical
Publication of CA2374407C publication Critical patent/CA2374407C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/288—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using variable impedance
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
    • H02H7/0844—Fail safe control, e.g. by comparing control signal and controlled current, isolating motor on commutation error

Abstract

A safety circuit system for a DC driven device for use with a fluid delivery system includes a first voltage potential DC power line, a second voltage potential DC power line, a controller and a safety circuit. The first voltage potential DC power line is coupled to provide a first voltage potential to the DC driven device, and the second voltage potential DC power line is coupled to provide a second voltage potential to the DC driven device such that the second voltage potential is different relative to the first potential. The controller controls at least the first voltage potential on the first voltage potential DC power line. The safety circuit has an enable state and a disable state, in which the default state is the disable state. The safety circuit is coupled to the controller, and the controller controls the safety circuit to place the safety circuit in the enable state independently of controlling the first voltage potential on the first voltage potential DC power line. The safety circuit is operatively coupled to at least one of the first and second voltage potential DC power lines to inhibit DC flow and operation of the DC
driven device when the safety circuit is in the disable state and to permit DC
flow and operation of the DC driven device when the safety circuit is in the enable state such that the operation of the DC driven device will occur when the safety circuit is in the enable state. In one version the DC driven device is a DC motor in an infusion pump, while in other versions the DC driven device is a gas generator in an infusion pump. Preferably, the safety circuit is controlled by an AC signal from the controller such that the safety circuit is enabled by the AC signal to permit DC flow and enable the forward motion of the DC motor while the AC signal is provided by the controller.
CA002374407A 1999-06-17 2000-06-16 Direct current motor safety circuits for fluid delivery systems Expired - Fee Related CA2374407C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/335,008 1999-06-17
US09/335,008 US6259587B1 (en) 1999-06-17 1999-06-17 Direct current motor safety circuits for fluid delivery systems
PCT/US2000/016655 WO2000079676A1 (en) 1999-06-17 2000-06-16 Direct current motor safety circuits for fluid delivery systems

Publications (2)

Publication Number Publication Date
CA2374407A1 true CA2374407A1 (en) 2000-12-28
CA2374407C CA2374407C (en) 2003-04-22

Family

ID=23309846

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002374407A Expired - Fee Related CA2374407C (en) 1999-06-17 2000-06-16 Direct current motor safety circuits for fluid delivery systems

Country Status (8)

Country Link
US (1) US6259587B1 (en)
EP (1) EP1192706B1 (en)
JP (1) JP2003503002A (en)
AT (1) ATE301881T1 (en)
AU (1) AU5495000A (en)
CA (1) CA2374407C (en)
DE (1) DE60021889T2 (en)
WO (1) WO2000079676A1 (en)

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Also Published As

Publication number Publication date
JP2003503002A (en) 2003-01-21
ATE301881T1 (en) 2005-08-15
US6259587B1 (en) 2001-07-10
AU5495000A (en) 2001-01-09
DE60021889T2 (en) 2006-06-01
DE60021889D1 (en) 2005-09-15
EP1192706A1 (en) 2002-04-03
CA2374407C (en) 2003-04-22
EP1192706B1 (en) 2005-08-10
WO2000079676A1 (en) 2000-12-28

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