NOVELTY - The motor i.e. brushless linear motor (100a), has a ring shaped magnet assembly (20) to generate strongest magnetic field along a magnetic field direction lying in multiple radial directions along homopolar contact planes at which same magnetic poles contact one another. Magnetic coils (30) are positioned so that current flows in a direction intersecting a magnetic field direction. The magnetic coils include A phase coils and B phase coils, where one of the selected phase coils is located inside of the assembly, and the other of selected phase coils is located outside of the assembly.    USE - Brushless rotary motor e.g. brushless linear motor i.e. single-phase motor, and six-pole, two-phase motor, for a robot, a moving body (all claimed) i.e. moving vehicle such as power assisted bicycle, and an electronic device e.g. projector and mobile phone. Can also be used for a brushless generator, a vibrating motor, a fan motor for a digital display device, a vehicle on-board device, fuel cell equipped apparatus such as fuel cell equipped personal computer, fuel cell equipped digital camera, fuel cell equipped video camera and fuel cell equipped mobile phone, a motor for household electric appliances e.g. drum type washing machine and a spindle motor for an optical storage device, a magnetic storage device and a polygon mirror drive.    ADVANTAGE - The motor enables generating strong magnetic field by the magnet assembly designed with homopoles held contacting one another, and drive power through interaction of the magnetic field with the magnet coils, thus efficiently generating power. Moreover, where the brushless electric machine is designed as a brushless generator, it will be possible to generate power efficiently. The magnetic fields are formed by the homopoles of the permanent magnets, thus forming small gaps between the homopoles, enabling a very large number of homopoles to be provided and achieving an efficient electrical motor of high torque type even at low speed.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a linear motor.    Ring shaped magnet assembly (20)    Magnetic coils (30)    Rotor (40a)    Stator (50a)    Brushless linear motor (100a)