Patent · US Active

Motor control system and method

US10461679B2 · kind B2 · utility

0Cited by

2References

20Claims

0Family size

Assignee

DANFOSS POWER ELECTRONICS A/S · DK

Inventors

Leandro Della Flora · Cary, US
Anton Smith · Nordborg, DK

Key dates

Filing date	Jan 4, 2017
Grant date	Oct 29, 2019
Priority date	—
Expiry date	Jan 4, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH02P27/12
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method and apparatus for catching a rotating motor is described. Switches (typically the lower switches) of an inverter of a motor drive circuit are short-circuited for a brief period of time. The pulses generated by this process are analyzed to determine the speed and direction of rotation of the motor. The pulses are checked to determine whether they are orthogonal. If they are, the motor velocity determination is deemed to be reliable and then motor is magnetized and normal motor control can be resumed. If not, the motor velocity determination is deemed to be unreliable and a magnetization pulse before the velocity determination step is repeated.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.