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Solenoid assembly actuation using resonant frequency current controller circuit
A solenoid latch system, or method, comprises a solenoid assembly driving a latch, where the solenoid assembly includes a function generator configured to adjust the frequency of a drive current signal to induce a vibration in the latch to release it from a preload condition. A power supply 502, FET 504 (MOSFET or GaNFET) and a function generator 506 may be used to drive a solenoid 508. The function generator 506 may sweep through a range of frequencies until it induces a desired resonant frequency vibration to release a latch from a preload condition or it may use a predetermined target frequency. Preload conditions and resonant vibration frequency details may be stored for future control use when a preload condition is sensed. The said details may be refreshed intermittently using a full frequency range sweep. Intermittent or periodic preload conditions may include a frequency adjusted signalling only when a preload condition is sensed. A preload sensor 510 may include a latch position sensor and a timer and/or other mechanical, electrical or magnetic sensors, to control the application of the function generator vibration signal when the latch does not reach the required position at the correct time. When faulty operation is sensed an alert signal may be produced to indicate the need for a repair.
Solenoid assembly actuation using resonant frequency current controller circuit
A solenoid latch system, or method, comprises a solenoid assembly driving a latch, where the solenoid assembly includes a function generator configured to adjust the frequency of a drive current signal to induce a vibration in the latch to release it from a preload condition. A power supply 502, FET 504 (MOSFET or GaNFET) and a function generator 506 may be used to drive a solenoid 508. The function generator 506 may sweep through a range of frequencies until it induces a desired resonant frequency vibration to release a latch from a preload condition or it may use a predetermined target frequency. Preload conditions and resonant vibration frequency details may be stored for future control use when a preload condition is sensed. The said details may be refreshed intermittently using a full frequency range sweep. Intermittent or periodic preload conditions may include a frequency adjusted signalling only when a preload condition is sensed. A preload sensor 510 may include a latch position sensor and a timer and/or other mechanical, electrical or magnetic sensors, to control the application of the function generator vibration signal when the latch does not reach the required position at the correct time. When faulty operation is sensed an alert signal may be produced to indicate the need for a repair.
Solenoid assembly actuation using resonant frequency current controller circuit
RANDALL SHAFFER (author)
2024-01-10
Patent
Electronic Resource
English
SOLENOID ASSEMBLY ACTUATION USING RESONANT FREQUENCY CURRENT CONTROLLER CIRCUIT
| European Patent Office | 2022