Linear Actuator Magnetic Holding and Low Power Drive

The patent employs dynamic magnetic field control by switching between drive coils and hold coils. The drive coils generate magnetic fields for movement, while hold coils generate magnetic fields specifically for maintaining position. This dynamic switching allows the system to adapt its magnetic field configuration based on operational requirements, providing both movement capability and stable holding under external disturbances.

The patent changes magnetic field parameters by activating different coil sets. During movement, drive coils are activated with specific current parameters. During holding, hold coils are activated with optimized current parameters to maintain position stability. This parameter switching enables the system to optimize performance for different operational states, ensuring reliable holding even under vibration or shock.

The patent uses periodic activation of hold coils rather than continuous activation. The hold coils are activated in cycles or pulses to maintain the mover's position, rather than being continuously powered. This periodic action maintains position stability while significantly reducing power consumption compared to continuous magnetic field application.

The magnetic circuit design allows the hold coils to maintain position with minimal energy input. Once the mover is positioned, the hold coils generate sufficient magnetic field to counteract external disturbances without requiring continuous high power input. The system essentially maintains itself in the held position with low power consumption.