公开(公告)号：GB2365631A

公开(公告)日：2002-02-20

申请号：GB0102242

申请日：2001-01-29

Applicant: PRIMAX ELECTRONICS LTD

Inventor： LIAU BUN-LIOU

IPC: H02K5/14 ,  H02K11/00 ,  H02K11/02 ,  H02K13/00 ,  H02K23/66

Abstract: Additionally, when electrical arcing occurs between the commutator and the brushes, the PCB 180 mounted over the commutator acts as a shield to absorb a portion of the radiation emitted by the arcing so as to reduce the EMI characteristics of the universal motor. The filter circuit 184 is electrically close connected to the brushes 162 via clips 161 to reduce the emission of electromagnetic radiation from the universal motors leads, the clips acting to secure the PCB in position.

公开(公告)号：JP2002058209A

公开(公告)日：2002-02-22

申请号：JP2001029519

申请日：2001-02-06

Applicant: PRIMAX ELECTRONICS LTD

Inventor： LIAU BUN-LIOU

IPC: H02K5/14 ,  H02K11/00 ,  H02K11/02 ,  H02K13/00 ,  H02K23/66

Abstract: PROBLEM TO BE SOLVED: To provide a universal motor in which a printed circuit board(PCB) is mounted on a rectifier to play a role of an electrical shielding for electromagnetic interference(EMI) generated by an electric arc between the rectifier and a brush. SOLUTION: A universal motor comprises a stator, a rotor, the brush and the printed circuit board(PCB). The rotor includes a shaft, and a rotor core is mounted on the shaft near the rectifier. The rotor core is electrically connected with the rectifier to rotate within the stator. The brush supplies an electrical output to the rectifier and is elastically in contact with the rectifier. A filter circuit reduces electromagnetic radiation from the universal motor and is in contact with the brush. The printed circuit board is mounted on the brush. When electronic arc is generated between the rectifier and brush, the printed circuit board functions as the electrical shielding to absorb a part of radiation generated by electronic arc in order to reduce the electromagnetic interference characteristic of the universal motor.

公开(公告)号：DE10129884A1

公开(公告)日：2002-02-28

申请号：DE10129884

申请日：2001-06-21

Applicant: PRIMAX ELECTRONICS LTD

Inventor： LIAU BUN-LIOU

IPC: H02K5/14 ,  H02K11/00 ,  H02K11/02 ,  H02K13/00 ,  H02K23/66

Abstract: A universal motor has a stator, a rotor, brushes, and a filter circuit on a printed circuit board (PCB). The rotor has a shaft, a commutator mounted on the shaft, and a rotor core mounted on the shaft adjacent to the commutator. The rotor core is electrically connected to the commutator, and rotates within the stator. The brushes deliver electrical power to the commutator, and they elastically contact the commutator. The filter circuit reduces the emission of electromagnetic radiation from the universal motor, and is electrically connected to the brushes. The PCB is mounted over the brushes. When electrical arcing occurs between the commutator and the brushes, the PCB acts as a shield to absorb a portion of the radiation emitted by the arcing so as to reduce the EMI characteristics of the universal motor.

公开(公告)号：GB2365631B

公开(公告)日：2004-06-23

申请号：GB0102242

申请日：2001-01-29

Applicant: PRIMAX ELECTRONICS LTD

Inventor： LIAU BUN-LIOU

IPC: H02K5/14 ,  H02K11/00 ,  H02K11/02 ,  H02K13/00 ,  H02K23/66

Abstract: A universal motor has a stator, a rotor, brushes, and a filter circuit on a printed circuit board (PCB). The rotor has a shaft, a commutator mounted on the shaft, and a rotor core mounted on the shaft adjacent to the commutator. The rotor core is electrically connected to the commutator, and rotates within the stator. The brushes deliver electrical power to the commutator, and they elastically contact the commutator. The filter circuit reduces the emission of electromagnetic radiation from the universal motor, and is electrically connected to the brushes. The PCB is mounted over the brushes. When electrical arcing occurs between the commutator and the brushes, the PCB acts as a shield to absorb a portion of the radiation emitted by the arcing so as to reduce the EMI characteristics of the universal motor.

公开(公告)号：DE10120795A1

公开(公告)日：2002-05-16

申请号：DE10120795

申请日：2001-04-27

Applicant: PRIMAX ELECTRONICS LTD

Inventor： LIAU BUN-LIOU

IPC: H02K5/14 ,  H02K5/15 ,  H02K5/167 ,  H02K5/173 ,  H02P3/04 ,  H02K7/102

Abstract: The universal motor includes brushes (162) for supplying an armature (136) via a commutator (134). A loading device (140,180) produces an internal loading for limiting the rotation speed of the motor in the event of the external load being lower or absent. The loading device includes a friction disc (142) and an elastic piece (186) to move the rotor longitudinally so that the friction discs are subject to an axial pressure.

公开(公告)号：DE10137137A1

公开(公告)日：2002-03-21

申请号：DE10137137

申请日：2001-07-30

Applicant: PRIMAX ELECTRONICS LTD

Inventor： LIAU BUN-LIOU

IPC: H02K23/10

Abstract: A combination type motor includes a stator and an armature. The stator has serial windings and parallel windings, installed on the opposing sides of the motor, to create a magnetic field. The armature, installed between the serial windings and parallel windings, provides a torque to drive a carrier. The parallel windings are connected in parallel to the armature to form a parallel circuit and in turn, the parallel circuit is connected in series to the serial windings to form a combination circuit.