US Patent Issued to Hitachi Astemo on April 22 for "Rotor of rotary electric machine, rotary electric machine and electric drive device" (Japanese Inventors)

ALEXANDRIA, Va., June 6 -- United States Patent no. 12,283,847, issued on April 22, was assigned to Hitachi Astemo Ltd. (Hitachinaka, Japan).

"Rotor of rotary electric machine, rotary electric machine and electric drive device" was invented by Masahiro Hori (Tokyo) and Masanori Sawahata (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Improving the coercive force of magnets used in a rotary electric machine by arranging magnets such that a q-axis side portion is located on an outer diameter side with respect to a d-axis side portion, and a magnet thickness Ti on an inner diameter side (d-axis side) of a rotor core is formed to be larger than a magnet thickness To on the outer diameter side (q-axis side)...