http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-533653-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0e433c1625fc509a087c912b440da84b |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H02P2209-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B19-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H02P6-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H02K23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H02P6-10 |
| filingDate | 2001-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2003-05-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_887c3114406a95b28427b5accad5e553 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e69294a3b257ea87951ed0fb337c105a |
| publicationDate | 2003-05-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-533653-B |
| titleOfInvention | Silent spin sine wave generator |
| abstract | A method and circuit are presented for operating a polyphase dc motor in which drive voltages are applied to the windings of the motor in predetermined phases. Zero crossings of currents flowing in respective windings of the motor are detected, and phases of the drive voltages are adjusted to have zero crossings substantially simultaneously with the detected zero crossings of the currents flowing in respective windings of the motor. The method includes generating a set of three waveforms (45, 46, 47) to provide drive voltages to respective windings of the motor. Each waveform has a period of 360 DEG with a first segment (43) having a value of zero for 120 DEG, followed by a second segment (50) having an ""up slope"" shape for 60 DEG, followed by a third segment (67, 68) having two consecutive ""cap"" shapes for 120 DEG, followed by a fourth segment (52) having ""down slope"" shape for 60 DEG. Each waveform of said set is displaced from one another by 120 DEG. As a result, the acoustic motor noise is reduced. |
| priorityDate | 2000-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 125.