MUMBAI, India, June 24 -- Intellectual Property India has published a patent application (202617061279 A) filed by Yamaha Hatsudoki Kabushiki Kaisha on May 14, 2026, for Straddled Vehicle.
Inventors include Torigoshi, Masaki; Hino, Haruyoshi; Takahashi, Toshihiko; Yamada, Yuya; and Takase, Hiroki.
The application for the patent was published on June 12, 2026, under issue no. 24/2026.
Abstract: The present invention provides a straddled vehicle equipped with a small and lightweight high-voltage hybrid system. The straddled vehicle includes an engine, a drive wheel, a high-voltage power supply system, a permanent magnet motor generator, a first MG control device, and a first power transfer device electrically connected to the high-voltage power supply system without a secondary battery that is electrically connected to the high-voltage power supply system and that functions at the high voltage. The first MG control device performs field weakening control on the first permanent magnet motor generator having the rotor which is provided with more magnetic poles than 2/3 of the number of teeth and which rotates at the same speed as the engine of the straddled vehicle so that, via field-weakening control using the high voltage as a power source, a current component of the field-weakening control is supplied to the winding to overcome reluctance that increases in the high-rotation range of the engine of the straddled vehicle, while the amount of voltage suppression caused by the field-weakening control is increased as a result of an increase in reluctance due to an increase in the magnetic poles of the first permanent magnet motor generator. The field-weakening control is performed using the high voltage higher than the low voltage of the low-voltage battery as a power supply.
Disclaimer: Curated by HT Syndication.
