Three-dimensional magnetic field generation device

The invention discloses a three-dimensional magnetic field generation device, comprising three groups of mutually orthogonal one-dimensional magnetic field generators. By adjusting side length sizes of a main coil and an auxiliary coil, relative space positions of the main and auxiliary coils and ampere-turns of the main and auxiliary coils and utilizing the linear relationship between an magnetic field and an electric current, enlargement of a magnetic field homogeneity range in a limited space is realized by adopting a constant-current direct-current power supply to drive the main and auxiliary coils. Compared with any traditional round or square Helmholtz coil, for generating the same magnetic field homogeneity range and magnetic field homogeneity, the limited space needed by the three-dimensional magnetic field generation device is greatly reduced by about 2 to 3 times, and the device is suitable for application occasions with higher requirements on the magnetic field homogeneity range and the magnetic field homogeneity in limited spaces.