Methods and apparatuses for compensating for friction torques of permanent magnet synchronous motors
US9350279B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 19, 2014 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Nov 2, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of compensating for a friction torque of a permanent magnet synchronous motor may include: receiving input of a motor current and a rotor speed of the permanent magnet synchronous motor; estimating a motor torque based on the input motor current; acquiring a first friction torque corresponding to the input rotor speed and the estimated motor torque by using a lookup table of friction torques; compensating for a second friction torque of the permanent magnet synchronous motor based on the first friction torque, wherein the compensating is in response to a first torque command input to control driving of the permanent magnet synchronous motor and outputs a second torque command that compensates for the second friction torque; and/or controlling the driving of the permanent magnet synchronous motor based on the second torque command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.