Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LOCKED-ROTOR DETECTION DEVICE, SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO/2023/159619
Kind Code:
A1
Abstract:
A motor controller generates first and second signals indicative of a motor back electromotive force (back emf) based on motor drive signals. The controller compares the first and second signals and detects a motor locked-rotor condition based on the comparison. The control circuitry may include a state observer, which, in operation, maintains a set of state variables based on the received signals, wherein the first signal indicative of the motor back emf is generated based on variables of the set of state variables. The controller may include a phase-locked-loop coupled to the state observer, wherein the phase-locked-loop, in operation, estimates a motor speed based on the variables of the set of state variables, wherein the second signal indicative of the motor back emf is generated based on the estimated motor speed. The motor may be a PMSM motor.

More Like This:
JP7054849Diagnostic device
WO/2020/165376METHOD FOR DETECTING A FAULT IN AN ELECTRICAL MACHINE FOR A VEHICLE
JP2017533688Methods and equipment for diagnosing phase current sensor defects in systems for controlling synchronous rotating electrical machinery in automated vehicles
Inventors:
LI XIAOHUI (CN)
SUN PENGFEI (CN)
Application Number:
PCT/CN2022/078454
Publication Date:
August 31, 2023
Filing Date:
February 28, 2022
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
STMICROELECTRONICS BEIJING R&D CO LTD (CN)
International Classes:
H02P29/024; H02H7/085
Foreign References:
CN112325442A2021-02-05
US20170126153A12017-05-04
CN109660168A2019-04-19
EP3002870A12016-04-06
Attorney, Agent or Firm:
KING & WOOD MALLESONS (CN)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: WATER DISPENSER CONTROL METHOD AND DEVICE, AND WATER DISPENSER

Next Patent: WATER DISPENSER