Internal rotor motor

Details Internal rotor motor Internal rotor motor

2005-07-19

2005-07-19

Nguyen, Tran (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156010, C310S156320, C310S156380, C310S156480, C310S156560, C310S269000

Reexamination Certificate

active

06919663

ABSTRACT:
A low-ripple multi-phase internal rotor motor has a slotted stator (28) separated by an air gap (39) from a central rotor (36). The rotor has a plurality of permanent magnets (214), preferably neodymium-boron, arranged in pockets (204) formed in a lamination stack (37), thereby defining a plurality of poles (206) separated by respective gaps (210). In a preferred embodiment, the motor is three-phase, with four rotor poles and six stator poles. As a result, when the first and third rotor poles are so aligned, with respect to their opposing stator poles, as to generate a reluctance torque, the second and fourth rotor poles are aligned to generate oppositely phased reluctance torques, so that these torques cancel each other, and essentially no net reluctance torque is exerted on the rotor. In order to magnetically separate the rotor magnets from each other, a hollow space (224, 238) is formed at the interpolar-gap-adjacent end face (216, 218) of each rotor magnet. A control circuit (147) provides electronic commutation and current control, based on rotor position signals generated with the aid of a control magnet (110) on the rotor shaft (40).

REFERENCES:
patent: 4445061 (1984-04-01), Jackson
patent: 4570333 (1986-02-01), Jones
patent: 4700098 (1987-10-01), Kawashima
patent: 5078590 (1992-01-01), Högseth
patent: 5097166 (1992-03-01), Mikulic
patent: RE34412 (1993-10-01), Elsaesser et al.
patent: 5331245 (1994-07-01), Burgbacher et al.
patent: 5581140 (1996-12-01), Futami et al.
patent: 5679995 (1997-10-01), Nagate et al.
patent: 5684352 (1997-11-01), Mita et al.
patent: 5841212 (1998-11-01), Mita et al.
patent: 5864191 (1999-01-01), Nagate et al.
patent: 5973431 (1999-10-01), Li et al.
patent: 6181047 (2001-01-01), Nitta
patent: 6208054 (2001-03-01), Tajima et al.
patent: 6208055 (2001-03-01), Takahashi
patent: 6234767 (2001-05-01), Takeda et al.
patent: 6265804 (2001-07-01), Nitta et al.
patent: 6484581 (2002-11-01), Nishimoto et al.
patent: 6582207 (2003-06-01), Matsumoto et al.
patent: 2002/0067096 (2002-06-01), Yamamoto et al.
patent: 198 51 883 (2000-05-01), None
patent: 100 20 946 (2001-11-01), None
patent: 0 343 457 (1989-11-01), None
patent: 1 067 656 (2001-01-01), None
patent: 1 164 684 (2001-12-01), None
patent: 1 314 901 (1973-04-01), None
patent: 07-222 384 (1995-08-01), None
patent: 08-251 846 (1996-09-01), None
patent: 10-271-723 (1998-10-01), None
patent: 2000-217 287 (2000-08-01), None
patent: 2001-069 701 (2001-03-01), None
Magneticasoft, “MAGNETICA—Magnetostatics for personal computers,” ©2000, pp. 1-2, found at www. magneticsoft.com/features.
Infineon Technologies, Munich Germany, “Product Brief GMR-B6 & GMR-C6 Giant Magneto Resistor -the optimized angle sensor,” copyright 2001, Ordering No. B112-H7829-X-X-7600, pp. 1-2; further details available at WWW.INFINEON.COM.

Affiliated with

Also associated with

Rating

Internal rotor motor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Internal rotor motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Internal rotor motor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3367836