Lead angle control circuit, and motor drive device and motor drive system using the lead angle control circuit
US8598825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2012 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Jun 15, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/153
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
According to an embodiment, a lead angle control circuit is configured to control a lead angle of a motor drive signal driving a motor. The lead angle control circuit includes a control signal generating section, an upper limit voltage limit section and a lead angle data generating section. The lead angle data generating section is configured to generate a relationship line between lead angle data representing the lead angle and a lead angle control signal, and configured to generate the lead angle data based on the relationship line and the lead angle control signal. The relationship line reaches an upper limit point from a lower limit point through a changing point. In the changing point, the lead angle control signal is a changing point voltage, and the lead angle data represents the lead angle corresponding to a lead angle setting voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.