http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20030074723-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H02P21-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H02P6-185 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01P3-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H02P27-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01P3-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B66B1-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H02P6-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H02P21-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H02P21-00 |
| filingDate | 2002-02-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2003-09-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-20030074723-A |
| titleOfInvention | Absolute position sensing method and apparatus for synchronous elevator machines by detection stator iron saturation |
| abstract | A method and apparatus for determining the position of a rotor relative to a stator in a synchronous motor elevator is provided. The method includes injecting an alternating current having a set single frequency and a set initial phase angle into a stator coil of the stator and sampling the injected current and the synthesized voltage a predetermined number of times per period of frequency. The method then calculates the stator inductance from the sampled voltage and current using the DFT. By increasing the initial phase angle a predetermined number of times per 360 degree period and repeating the injection, sampling and calculation with each increased phase angle, the algorithm provides a set value of the calculated stator inductance. Then, the position of the d-axis relative to the stator is determined from the calculated minimum value of the stator inductance. |
| priorityDate | 2001-02-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419491185 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID23925 |
Total number of triples: 18.