An induction motor or generator assembly for converting either of an electrical input or rotating work input to a mechanical/rotating work or electrical output. An outer annular arrayed component is rotatable in a first direction and includes a plurality of magnets arranged in a circumferentially extending and inwardly facing fashion according to a first perimeter array, the outer component further incorporating a rotating shaft projecting from a central location. An inner concentrically arrayed and reverse rotating component exhibits a plurality of outwardly facing and circumferentially spaced array of coil-subassemblies opposing the magnetic elements, such that a gap separates the coil-subassemblies from the magnets. The coil sub-assemblies each include a plurality of concentrically arrayed coils configured within a platform support of the inner component. A fixed commutator has a plurality of annular extending and individually insulated segments, a similar plurality of outer rotating brushes in continuous contact with the commutator segments.

An induction motor or generator assembly for converting either of an electrical input or rotating work input to a mechanical/rotating work or electrical output. An outer annular arrayed component is rotatable in a first direction and includes a plurality of magnets arranged in a circumferentially extending and inwardly facing fashion according to a first perimeter array, the outer component further incorporating a rotating shaft projecting from a central location. An inner concentrically arrayed and reverse rotating component exhibits a plurality of outwardly facing and circumferentially spaced array of coil-subassemblies opposing the magnetic elements, such that a gap separates the coil-subassemblies from the magnets. The coil sub-assemblies each include a plurality of concentrically arrayed coils configured within a platform support of the inner component. A fixed commutator has a plurality of annular extending and individually insulated segments, a similar plurality of outer rotating brushes in continuous contact with the commutator segments.

A plate separator for separating a substance from a substance mixture, with a separator device and an electric motor for rotary driving of the separator device. The separator device is coupled to the electric motor in a rotationally fixed manner. The electric motor is configured as an external rotor and has an inner-lying stator and an outer-lying rotor in the radial direction with respect to an axis of rotation. The separator device is fastened to the rotor and extends outward from the rotor in the radial direction. The stator is arranged, as viewed in the axial direction with respect to the axis of rotation, at least partially overlapping with the separator device.

A plate separator for separating a substance from a substance mixture, with a separator device and an electric motor for rotary driving of the separator device. The separator device is coupled to the electric motor in a rotationally fixed manner. The electric motor is configured as an external rotor and has an inner-lying stator and an outer-lying rotor in the radial direction with respect to an axis of rotation. The separator device is fastened to the rotor and extends outward from the rotor in the radial direction. The stator is arranged, as viewed in the axial direction with respect to the axis of rotation, at least partially overlapping with the separator device.

A method of manufacturing a motor assembly comprising a motor and an impeller coupled to a rotation shaft of the motor, the method includes disposing a plurality of balls in a ring-shaped groove formed in a surface of the impeller; rotating the impeller at a speed greater than a resonant rotation speed to move the balls to a compensation position for compensating for an eccentricity in the motor assembly; and fixing the balls at the compensation position in the groove.

A method of manufacturing a motor assembly comprising a motor and an impeller coupled to a rotation shaft of the motor, the method includes disposing a plurality of balls in a ring-shaped groove formed in a surface of the impeller; rotating the impeller at a speed greater than a resonant rotation speed to move the balls to a compensation position for compensating for an eccentricity in the motor assembly; and fixing the balls at the compensation position in the groove.

A motor includes a bearing holder for holding a bearing that rotatably supports a rotary shaft extending in the vertical direction, a bracket for holding the bearing holder, a circuit board having electronic components mounted thereon, and board fixing portions for fixing the circuit board to the bracket. The circuit board has a first region representing part of a mounting surface having the electronic components mounted thereon in the circumferential direction and a second region representing a region of the mounting surface other than the first region. The total weight of the electronic components mounted in the first region is greater than that in the second region. The number of the board fixing portions that fix the circuit board in the first region is greater than the number of the board fixing portions that fix the circuit board in the second region.

To provide an outer rotor type motor capable of suppressing the runout of a top surface by improving the strength in a fitted part between a rotor yoke and a rotor shaft and suppressing resonance between vibration generated by rotation of a rotated body to be a load and motor vibration to thereby realize noise reduction. A rotor yoke is configured so that a rotor hub is fitted to a top surface portion formed in a cup shape integrally with a rotor shaft, and a reinforcing hub concentrically fixed to the rotor shaft with the rotor yoke is arranged so as to overlap the rotor hub.

A magnetic coupling includes an inner rotor (11) and an outer rotor (9) which at least partly surrounds the inner rotor (11). These rotors (11, 9) each are formed of magnetic material (18) and are coupled to one another by way of magnetic forces. The inner rotor (11) and/or the outer rotor (9) contain powdery, magnetizable material (18). The powdery, magnetizable material (18) is magnetized at a side lying opposite the other rotor at several locations distributed over the periphery.

A magnetic coupling includes an inner rotor (11) and an outer rotor (9) which at least partly surrounds the inner rotor (11). These rotors (11, 9) each are formed of magnetic material (18) and are coupled to one another by way of magnetic forces. The inner rotor (11) and/or the outer rotor (9) contain powdery, magnetizable material (18). The powdery, magnetizable material (18) is magnetized at a side lying opposite the other rotor at several locations distributed over the periphery.