Abstract: The present disclosure provides a stellarator magnet based on cubic permanent magnet blocks and an arrangement optimization method thereof. For the characteristic that a three-dimensional magnet coil of a stellarator is complex in structure, the present disclosure provides the stellarator magnet based on the cubic permanent magnet blocks with uniform magnetization, same magnetization and same size; the magnetization directions of the cubic permanent magnet blocks are defined in a limited number of fixed alternative directions; the magnetic field configuration of the stellarator is generated by dipole magnetic fields provided by the permanent magnet blocks and planar coils, so that the device complexity of the stellarator is reduced, and the difficulty and cost of the machining and installation of the magnet are reduced.

Abstract: The present disclosure provides a stellarator magnet based on cubic permanent magnet blocks and an arrangement optimization method thereof. For the characteristic that a three-dimensional magnet coil of a stellarator is complex in structure, the present disclosure provides the stellarator magnet based on the cubic permanent magnet blocks with uniform magnetization, same magnetization and same size; the magnetization directions of the cubic permanent magnet blocks are defined in a limited number of fixed alternative directions; the magnetic field configuration of the stellarator is generated by dipole magnetic fields provided by the permanent magnet blocks and planar coils, so that the device complexity of the stellarator is reduced, and the difficulty and cost of the machining and installation of the magnet are reduced.

Abstract: An accessory clamping mechanism for clamping an accessory to a working mandrel of a power tool wherein the working mandrel has a mandrel flange and a first longitudinal axis. The accessory clamping mechanism includes: at least one clamping member; a thrust member for supporting the clamping member; an elastic member by which the thrust member is biased towards a clamped position; a driving assembly for forcing the thrust member and the clamping member to move along the first longitudinal axis, the driving assembly comprising a driving member moved between a first position in which the accessory is in the clamped position and a second position in which the accessory is in a released position, the thrust member and the clamping member being driven by the driving member to move along the first longitudinal axis; and a motion converting member for driving the clamping member to move in a direction different from the first longitudinal axis.

Abstract: An accessory clamping mechanism for clamping an accessory to a working mandrel of a power tool wherein the working mandrel has a mandrel flange and a first longitudinal axis. The accessory clamping mechanism includes: at least one clamping member; a thrust member for supporting the clamping member; an elastic member by which the thrust member is biased towards a clamped position; a driving assembly for forcing the thrust member and the clamping member to move along the first longitudinal axis, the driving assembly comprising a driving member moved between a first position in which the accessory is in the clamped position and a second position in which the accessory is in a released position, the thrust member and the clamping member being driven by the driving member to move along the first longitudinal axis; and a motion converting member for driving the clamping member to move in a direction different from the first longitudinal axis.