2012

Oct.30, 2012

Minebea Co., Ltd.

Launching of 42 mm Square Hybrid Type Stepping Motors

~ New Design! Magnet with No Rare-Earth Element Content Realizes High Torque and High-Speed Followability Characteristics ~

Minebea Co., Ltd. (hereafter referred to as "Minebea") will launch its "Newly designed, high-torque, hybrid stepping motor" on October 30. This motor (size 42 mm square, stepping angle 1.8°: hereafter, high-torque 42 mm square HB motor) provides high torque via powerful magnets (hereafter called "non-rare earth magnets") having high magnetic force yet that do not use rare-earth metals such as neodymium or dysprosium.

Typical motors realize high torque by utilizing a neodymium sintered magnet which has the most powerful magnetism among permanent magnet types. However, this newly designed high-torque 42 mm square HB motor delivers motor torque equal or greater than neodymium sintered magnets by using powerful non-rare earth magnets as a substitute not requiring rare-earth metals such as neodymium.

In recent years, due to a drastic rise in price as well as anxiety over stable supply of neodymium and dysprosium, which are the raw material for neodymium sintered magnets, we, Minebea, have developed high-performance, high-torque motors using substitute magnets that use no rare earth materials. By switching over to non-rare earth magnets from here onwards we will secure a stable raw material supply and provide a stable supply of our products while lowering costs at the same time.

Features of the high-torque 42 mm square HB motor

1. Realized high torque by using non-rare earth magnets!

2. Newly designed internal structure & rotor, and stator gear profile!

  • To develop this hybrid stepping motor, we made use of its massive store of magnetic field analysis data and various types of simulation software. A newly designed "rotor" and "stator gear profile" are what enabled us to provide ideal magnetic efficiency even while using non-rare earth magnets!
  • Optimizing the internal structure design realized high-speed followability at a torque higher than that of neodymium sintered magnets.

3. Resource-saving design! Uses one less magnet as well as 25% less copper wire

  • The high-torque 42 mm square HB motor utilizes a newly designed internal structure that delivers with only one non-rare earth magnet, the same or higher torque than two ordinary neodymium sintered magnets.
  • Moreover, the copper wiring (magnet wire) quantity has been cut to 25% less than that of older Minebea products in a resource-saving design that drastically cuts down on material usage.
Image : High-torque 42 mm square HB stepping motor

High-torque 42 mm square HB stepping motor

Launching : October 30, 2012
Price : Please contact us or our dealer.

Reference

Torque characteristics

Graph comparing torque characteristics of new 42×48 mm square model (17PM-F4xx) with conventional 42×48 mm square model (17PM-J4xx)

Image : Graph comparing torque characteristics of new 42×48 mm square model (17PM-F4xx) with conventional 2×48 mm square model (17PM-J4xx)
Sales Inquiries: Stepping Motor Product Sales Management
E-mail jpslhbstdinfo@m-mmotor.com
Media Inquiries: Minebea Co., Ltd.
Corporate Communications Office
TEL 81-3-5434-8637 FAX 81-3-5434-8607
Information in the press releases is current on the date of the announcement.
Product information, contact and other context are subject to change without prior notice.

Back to Press Release List

Go back to top of this page