Abstract: A stator includes a stator core, a first coil and a second coil inserted into slots, and an insulating sheet arranged between the first and second coils. The first coil has a first portion accommodated in a first slot, and the second coil has a second portion accommodated in the first slot. The insulating sheet includes a sheet-like insulating parts projecting from respective end surfaces of the stator core, and leg parts. Each of the sheet-like insulating parts is arranged between a first coil end of the first coil extending from the first portion to the outside of each of the end surfaces and a second coil end of the second coil extending from the second portion to the outside of each of the end surfaces, and the leg parts include a first leg part inserted into the first slot and arranged between the first and second portions.

Abstract: A stator includes a stator core, a first coil and a second coil inserted into slots, and an insulating sheet arranged between the first and second coils. The first coil has a first portion accommodated in a first slot, and the second coil has a second portion accommodated in the first slot. The insulating sheet includes a sheet-like insulating parts projecting from respective end surfaces of the stator core, and leg parts. Each of the sheet-like insulating parts is arranged between a first coil end of the first coil extending from the first portion to the outside of each of the end surfaces and a second coil end of the second coil extending from the second portion to the outside of each of the end surfaces, and the leg parts include a first leg part inserted into the first slot and arranged between the first and second portions.

Abstract: Provided is a permanent magnet rotor that includes a plurality of magnets sequentially disposed on an outer circumferential surface of a core having a cylindrical shape along a circumferential direction of the core and a plurality of projection portions each disposed between the magnets adjacent to each other. Then a cover portion is formed such that a height of a space in a radial direction of the core is more reduced as from a base portion of the projection portions toward a tip end of the cover portion.

Abstract: A motor includes: a stator core having a plurality of slots; and a winding inserted into the slot as distributed windings of three phases, wherein an interphase insulation sheet is mounted on a coil end of the winding. The interphase insulation sheet includes: planar insulating portions disposed so as to protrude from each of end surfaces of the stator core; a first leg portion and a second leg portion which integrally connect the planar insulating portions at the end surfaces and which are inserted into the slots; insulating convex portions that protrude toward an inner side in a radial direction of the stator core from the planar insulating portion; and a third leg portion that integrally connects the insulating convex portions at the end surfaces and which are inserted into the slot.

Abstract: A motor includes: a stator core having a plurality of slots; and a winding inserted into the slot as distributed windings of three phases, wherein an interphase insulation sheet is mounted on a coil end of the winding. The interphase insulation sheet includes: planar insulating portions disposed so as to protrude from each of end surfaces of the stator core; a first leg portion and a second leg portion which integrally connect the planar insulating portions at the end surfaces and which are inserted into the slots; insulating convex portions that protrude toward an inner side in a radial direction of the stator core from the planar insulating portion; and a third leg portion that integrally connects the insulating convex portions at the end surfaces and which are inserted into the slot.

Abstract: Provided is a permanent magnet rotor that includes a plurality of magnets sequentially disposed on an outer circumferential surface of a core having a cylindrical shape along a circumferential direction of the core and a plurality of projection portions each disposed between the magnets adjacent to each other. Then a cover portion is formed such that a height of a space in a radial direction of the core is more reduced as from a base portion of the projection portions toward a tip end of the cover portion.

Abstract: A capacitance-type encoder capable of obtaining position data of a movable element with low power-consumption. The capacitance-type encoder comprises a stator, a movable element arranged to confront the stator, an excitation device and a signal processing device. The stator has at least three excitation-electrode sets electrically independent from each other, each set constituted of excitation electrodes arranged cyclically and electrically connected with each other so that a predetermined number of excitation-electrode groups are formed. The movable element has connection electrodes having the same number as the excitation-electrode groups. The excitation device applies excitation signals to the excitation-electrode sets periodically in a predetermined sequence.

Abstract: A capacitance-type encoder comprising a stator, a movable element, an excitation device and a signal processing device to obtain position data with low power-consumption. The stator has excitation-electrode sets electrically independent and displaced to have phase differences from each other to form a predetermined number of excitation-electrode groups. The movable element has connection electrodes having the same number as the excitation-electrode groups. The excitation device simultaneously applies a first pair of positive and negative pulse voltages respectively to two of the excitation-electrode sets having a phase difference of 180 degrees, and then simultaneously applies a second set of positive and negative pulse voltages respectively to the rest of the excitation-electrode sets.