Qualcomm is acquiring Arduino but allowing it to operate independently. The new Qualcomm-powered UNO Q is available for $44. Qualcomm is a huge player in the SBC space, dwarfing Raspberry Pi.
Abstract: This article proposes an improved position sensorless control method for interior permanent magnet synchronous motors (IPMSMs) using high-frequency square-wave injection (HFSI). Conventional ...