Abstract: The invention relates to a motor which comprises a drive system which has a stator (10) and a rotor (14), and a control system which controls the drive system and has circuit boards (21), (22), both being housed in a casing (2), wherein the casing (2) has a first conductive pin (25) for flowing a current to input power to the control system and a second conductive pin (26) for flowing a current to output from the control system to respective phases of a coil, and the circuit boards are supported by the first and second conductive pins. And, the invention relates to a method of manufacturing a motor which comprises the steps of using a first die (101) and a second die (102) which are mutually connected with a die split face (104) therebetween and a third die (103) which is inserted in the middle of the first and second dies, inserting and fixing a motor stator, a metallic cylinder and embedding members into a cavity formed by the first, second and third dies, and pouring a molten resin to effect resin molding.

Abstract: A brushless motor includes a stator and a rotor rotatably supported inside the stator. The rotor has a rotor yoke formed by laminating a large number of steel plates, the rotor yoke has an even number of magnetic pole portions protruding outward, and a field magnet is fitted to each of the magnetic pole portions or every other magnetic pole portions. A magnetic sensor is disposed within the range in which the sensor can directly detect a magnetic flux leaking outside from an end face of the rotor and is less affected by irregular fluxes near the rotor end face, so that this sensor can detect a peak point of a flux density around the rotor. A magnetic sensor is disposed within the range where the influences of the irregular fluxes are small. A magnet to be detected is fitted to the rotor end face, and a magnetic sensor for one direction and a magnetic sensor for the other direction are disposed near the trajectory of rotation of the detected magnet.

Abstract: An efficient permanent magnet rotor for a brushless motor has a yoke (2) formed by laminating many steel sheets (4) so as to provide an even number of magnetic poles projected externally, filed permanent magnets (3) inserted in the magnetic poles, bridges (10) provided at either end of the permanent magnets and having a width, among a first minimum width below which said bridges cannot be punched out without breaking, a maximum width at which an allowable maximum number of magnetic fluxes passes through said bridges, and a second minimum width below which said bridges cannot withstand a centrifugal force caused by rotation of said permanent magnet rotor, (1) equal to or larger than the greater one of the first and second minimum widths and smaller than the maximum width when the first and second minimum widths are equal to or smaller than the maximum width, or (2) equal to or larger than the greater one of the first and second minimum widths when said greater one of the first and second minimum widths is equa

Abstract: A brushless motor includes a stator and a rotor rotatably supported within the stator. The rotor includes a yoke which is formed by laminating many steel sheets so as to provide an even number of magnetic poles projected externally and slots provided in each of or every other said magnetic poles, a permanent magnet for a field inserted in each of said slots and having top, bottom, front, rear, and side faces, and protuberances provided on opposite sides of said slots and brought into contact with the side faces of said permanent magnet for the field, forming spaces on opposite sides of said slots.