Controller for EC motor and method thereof
US10056852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2017 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | Jan 17, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/17
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Rotation speed control systems for an Electronically Commutated (EC) motor and method for controlling rotation speed of an EC motor are described. An rotation speed control system includes a phase detector for detecting a period, an ON time interval, an OFF time interval, and zero crossing time points of the phase cut AC signal; a voltage regulator for converting the phase cut an AC signal into a DC signal; a controller for generating a compatible waveform to drive the EC motor with a rotation speed instructed by the controller, in accordance with an ON/OFF time ratio determined based on the ON time interval and OFF time interval of the phase cut AC signal; and an EC motor interface, powered by the DC signal, for driving each of a plurality of windings of the EC motor with the compatible waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.