摘要:
An electric motor comprises: a rotor; a stator; and brush gear. The rotor has a shaft, a rotor core and a commutator fitted to the shaft. The rotor core has 5n teeth, n being a positive integer. Two coils are wound in each tooth with each coil being wound about a single tooth and having two ends. The commutator has 10n bars forming a brush contact surface. The stator comprises a yoke and a plurality of permanent magnets installed at an inner surface of the yoke and facing the rotor core. The brush gear has a plurality of carbon brushes arranged to make sliding contact with the brush contact surface of the commutator. The ends of the two coils wound in each tooth are respectively connected to two pairs of adjacent bars and the center line between one pair of the two pairs of adjacent bars and the center line between the other pair of the two pairs of adjacent bars are diametrically opposed.
摘要:
An electric motor includes: a rotor; a stator; and brush gear. The rotor has a shaft, a rotor core and a commutator fitted to the shaft. The rotor core has 5n teeth, n being a positive integer. Two coils are wound on each tooth with each coil being wound about a single tooth and having two ends. The commutator has 10n bars forming a brush contact surface. The stator includes a yoke and a plurality of permanent magnets installed at an inner surface of the yoke and facing the rotor core. The ends of the two coils wound on each tooth are respectively connected to two pairs of adjacent bars and the center line between one pair of the two pairs of adjacent bars and the center line between the other pair of the two pairs of adjacent bars are diametrically opposed.
摘要:
A universal motor includes a stator and a rotor rotatable relative to the stator. The stator includes a stator core and winding wound on the stator core. The stator core has an E-shape cross section and comprises a main part and three extension parts extending perpendicularly from the main part. Each extension part has an arc surface. The arc surfaces of the extension parts cooperatively form a space into which the rotor is received.
摘要:
An electric machine has a stator and a rotor. The stator has a housing and at least one pair of magnetic poles. Each magnetic pole has a primary magnet and two auxiliary magnets disposed on respective sides of the primary magnet. All of the magnets are disposed on an inner surface of the housing. All the magnets of a magnetic pole have the same polarity.
摘要:
An electric motor includes a stator and a rotor installed in the stator. The stator has a laminated stator core and at least two stator windings wound on the stator core. The stator core has at least two stator poles facing the rotor and at least two yokes connecting adjacent stator poles. T stator core is constituted by at least two separate members joined together. The at least two stator poles are only arranged at a single one of the at least two separate members.
摘要:
A brush motor includes a stator with 2P magnetic poles and a rotor which includes a rotor core, a commutator and windings wound on the rotor core. The rotor core includes N teeth with a slot formed between adjacent teeth. The commutator includes M segments represented by Z1 . . . ZX . . . ZY . . . ZM, wherein M, N, P, Y and X are integers and M is odd and greater than N. Each winding includes a start connected to a segment ZX and an end connected to another segment ZY. Each winding includes at least one coil wound about a corresponding tooth or set of teeth. Some of the windings include a plurality of coils wound on different teeth. The total number of turns of the coils for each winding is substantially the same. A winding unit consisting of a plurality of windings is connected between each pair of adjacent segments. ZX and ZY satisfy the following equation: |Y−X|=(M±1)/P.
摘要:
A universal motor includes a stator and a rotor rotatable relative to the stator. The stator includes a stator core and winding wound on the stator core. The stator core has an E-shape cross section and comprises a main part and three extension parts extending perpendicularly from the main part. Each extension part has an arc surface. The arc surfaces of the extension parts cooperatively form a space into which the rotor is received.
摘要:
A permanent magnet electric motor includes a rotor and a stator magnetically coupled to the rotor. The rotor includes a shaft, a rotor core fixed to the shaft and having n teeth, n being an integer, a commutator fixed to the shaft adjacent the rotor core and having m segments, m being an even number less than n. Rotor windings are wound about the teeth and connected to the segments. The stator includes a plurality of permanent magnets surrounding the rotor core and brushes in sliding electrical contact with the commutator.
摘要:
A universal motor has a rotor and a stator. The stator comprises a pair of symmetrical C-shaped stator cores and two windings respectively wound on the stator cores. Each stator core comprises a yoke and a pair of poles extending from opposite ends of the yoke. The windings are wound on the yokes. Each pole has a curved surface and the surfaces of the poles cooperatively form an opening. The rotor is rotatably received in the opening.
摘要:
An electric machine has a stator and a rotor. The stator has a housing and at least one pair of magnetic poles. Each magnetic pole has a primary magnet and two auxiliary magnets disposed on respective sides of the primary magnet. All of the magnets are disposed on an inner surface of the housing. All the magnets of a magnetic pole have the same polarity.