Magnetic drive system and method combining permanent magnet array and double coil

Abstract

The invention provides a magnetic drive system and method combining a permanent magnet array and a double coil, belonging to the field of magnetic manipulation. The system includes: a Halbach ring array, a Maxwell coil and a power supply; two Maxwell coils are placed in parallel, and the current direction is opposite; The Halbach ring array and the Maxwell coil are coaxially nested; when in use, the controlled object is placed at the origin of the xyz coordinate system, and the power supply is connected to the Maxwell coil; the Halbach ring array is used to provide a uniform magnetic field on the xoy plane, and the controlled object is oriented uniformly The magnetic field, whose magnetization direction is aligned with the direction of the uniform magnetic field; the Maxwell coil is used to provide the magnetic field gradient field on the xoy plane, driving the controlled object to move towards the direction of the uniform magnetic field; wherein, the magnetization direction of the controlled object is consistent with the direction of the magnetization intensity; The invention greatly reduces structural complexity and driving power consumption, and reduces heat dissipation pressure.

Description

technical field [0001] The invention belongs to the field of magnetic manipulation, and more specifically relates to a magnetic drive system and method combining a permanent magnet array and a double coil. Background technique [0002] Magnetic manipulation refers to a non-contact driving technology that adjusts / changes the spatial position or shape of magnetic substances by applying an external magnetic field. It has broad application prospects in the fields of magnetic separation, magnetic targeting, and magnetically controlled soft robots. [0003] The way of magnetic manipulation includes the use of magnetic torque induced by a magnetic field, gradient magnetic force or a combination of the two. Among them, the control method that combines the magnetic torque action and the gradient magnetic force action has a simpler implementation and a flexible control mode due to the decoupling of steering and drive, and has attracted more and more attention in recent years. [0004...

AI Technical Summary

Problems solved by technology

However, the device composed of eight coils has a complex structure and a large amount of control, and the existence of multiple coils limits the optimization space of the coil structure, which makes the development of the entire magnetic drive system difficult and consumes a lot of energy.

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