Inventor

LIU KEAN

CN5 patents

⚠️ This page may combine multiple inventors who share the name “LIU KEAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INSTITUTE CO LTD

2 patents

US10033313B2Jul 24, 2018

Control method for restarting permanent magnet synchronous motor with speed, device and system thereof

CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INSTITUTE CO LTD4 citations65

US9991829B2Jun 5, 2018

Direct-axis current protection method and device for permanent magnet synchronous motor drive system

CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INSTITUTE CO LTD0 citations35

ZHUZHOU CRRC TIMES ELECTRIC CO LTD

2 patents

US12448015B2Oct 21, 2025

Information security protection method and apparatus

ZHUZHOU CRRC TIMES ELECTRIC CO LTD0 citations47

US11646675B2May 9, 2023

Voltage control method and system

ZHUZHOU CRRC TIMES ELECTRIC CO LTD0 citations38

CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RES INSTITUTE CO LTD

1 patent

US9837946B2Dec 5, 2017

Method and device for acquiring rotor position based on permanent magnet synchronous drive system

CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RES INSTITUTE CO LTD7 citations80