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1. WO2022005810 - METHOD FOR AND CONTROL SYSTEM WITH PISTON AMPLITUDE RECOVERY FOR FREE-PISTON MACHINES

Publication Number WO/2022/005810
Publication Date 06.01.2022
International Application No. PCT/US2021/038433
International Filing Date 22.06.2021
IPC
F02G 1/043 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
GHOT-GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES, NOT OTHERWISE PROVIDED FOR
1Hot gas positive-displacement engine plants
04of closed-cycle type
043the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
F01B 11/00 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
11Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
G01P 13/02 2006.1
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT;  INDICATING DIRECTION OF MOVEMENT 
13Indicating or recording presence or absence of movement; Indicating or recording of direction of movement
02Indicating direction only, e.g. by weather vane
G01P 13/04 2006.1
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT;  INDICATING DIRECTION OF MOVEMENT 
13Indicating or recording presence or absence of movement; Indicating or recording of direction of movement
02Indicating direction only, e.g. by weather vane
04Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
F02B 71/00 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
71Free-piston engines; Engines without rotary main shaft
Applicants
  • GLOBAL COOLING, INC. [US]/[US]
Inventors
  • BERCHOWITZ, David, M.
Agents
  • FOSTER, Frank, H.
  • FOSTER, Hason, H.
Priority Data
16/919,68902.07.2020US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR AND CONTROL SYSTEM WITH PISTON AMPLITUDE RECOVERY FOR FREE-PISTON MACHINES
(FR) PROCÉDÉ DE RÉCUPÉRATION D'AMPLITUDE DE PISTON ET SYSTÈME DE COMMANDE ASSOCIÉ POUR MACHINES À PISTON LIBRE
Abstract
(EN) A method and apparatus for detecting the displacement amplitude of an armature of a linear motor or alternator that is drivingly coupled to a load or prime mover. The method and apparatus require only three inputs all derived from the input terminals of the linear motor or alternator: (1) the voltage measured across the linear motor terminals; (2) the current consumed by the linear motor; and (3) the phase between the voltage and current. The three inputs are sensed at the terminals of the linear motor or alternator and used to perform mathematical calculations in the microcomputer of a control system or controller, The mathematical calculations are based on equivalent circuits that are modifications of the equivalent circuit for the linear motor or alternator. The detected displacement amplitude can be used by a controller to limit the displacement amplitude of the armature to prevent collisions.
(FR) Procédé et un appareil permettant de détecter l'amplitude de déplacement d'un induit d'un moteur linéaire ou d'un alternateur accouplé en entraînement à une charge ou à un moteur primaire. Le procédé et l'appareil requièrent seulement trois entrées, toutes dérivées des bornes d'entrée du moteur linéaire ou de l'alternateur : (1) la tension mesurée en travers des bornes du moteur linéaire ; (2) le courant consommé par le moteur linéaire ; et (3) la phase entre la tension et le courant. Les trois entrées sont détectées au niveau des bornes du moteur linéaire ou de l'alternateur, et utilisées pour effectuer des calculs mathématiques dans le micro-ordinateur d'un système de commande ou d'un dispositif de commande. Les calculs mathématiques sont fondés sur des circuits équivalents qui sont des modifications du circuit équivalent pour le moteur linéaire ou l'alternateur. L'amplitude de déplacement détectée peut être utilisée par un dispositif de commande pour limiter l'amplitude de déplacement de l'induit afin d'empêcher des collisions.
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