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1. WO2020115260 - METHOD AND APPARATUS FOR CONTROLLING POWER DELIVERED TO AN SMA ACTUATOR

Publication Number WO/2020/115260
Publication Date 11.06.2020
International Application No. PCT/EP2019/083918
International Filing Date 05.12.2019
IPC
F03G 7/06 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
GSPRING, WEIGHT, INERTIA, OR LIKE MOTORS; MECHANICAL-POWER-PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
7Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
06using expansion or contraction of bodies due to heating, cooling, moistening, drying, or the like
CPC
F03G 7/065
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
GSPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
7Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
06using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
065using a shape memory element
Applicants
  • CAMBRIDGE MECHATRONICS LIMITED [GB]/[GB]
Inventors
  • EASTON, Mark George
Agents
  • CAMBRIDGE MECHATRONICS LTD
Priority Data
1819864.805.12.2018GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR CONTROLLING POWER DELIVERED TO AN SMA ACTUATOR
(FR) PROCÉDÉS ET APPAREIL DE CONTRÔLE DE PUISSANCE DÉLIVRÉE À UN ACTIONNEUR SMA
Abstract
(EN)
A method of controlling power delivered to a shape memory alloy, SMA, actuator wire arrangement, wherein the arrangement comprises a plurality of SMA actuator wires, comprising: the steps of: applying, at a PWM frequency, to each of the SMA actuator wires during respective active periods a succession of voltage pulses; and applying, during a resistance measurement period, to one of the plurality of SMA actuator wires a resistance measurement current pulse, wherein the resistance measurement period corresponds to the respective active period of one of the plurality of SMA actuator wires.
(FR)
L'invention concerne un procédé de contrôle de puissance délivrée à un agencement de fils d'actionneur en alliage à mémoire de forme (SMA) qui comprend une pluralité de fils d'actionneur en alliage à mémoire de forme. Ledit procédé comprend les étapes consistant à : appliquer à chacun des fils d'actionneur SMA pendant des périodes actives respectives une succession d'impulsions de tension à une fréquence PWM; et appliquer, pendant une période de mesure de résistance, à l'un de la pluralité de fils d'actionneur SMA une impulsion de courant de mesure de résistance, la période de mesure de résistance correspondant à la période active respective de l'un de la pluralité de fils d'actionneur SMA.
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