Electronically controlled switch for an electric motor
US10050568B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2017 |
| Grant date | Aug 14, 2018 |
| Priority date | — |
| Expiry date | Feb 27, 2037 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F2105/46
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A system in which the operation of an electric motor is controlled by electronically controlled switches. The system includes the motor having a run winding and a start winding, a heating component, and a motor control subsystem. A control unit closes a first switch to energize the run winding, closes a second switch to energize the start winding, determines based on an amplitude and a lag time of a current flowing through the motor whether the motor has started and is running normally, and if so, opens the second switch to de-energize the start winding and closes a third switch to activate the heating component. The control unit determines whether the motor has started and is running normally by comparing the real time amplitude and lag time of the current to a plurality of stored amplitudes and lag times associated with different operating conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.