发明名称 |
Origin offset calculation method of rotational position detecting device of electric motor and motor control device using the calculation method |
摘要 |
An inverter that executes a d q-axis control of a three-phase synchronous motor needs a rotational position sensor that detects rotational positions of an electric motor for mutual conversion between two-phase and three-phase. An angle error of this rotational position sensor affects accuracy in the d q-axis control, so that it is necessary to make a compensation with accuracy. In the conventional method, however, there is a problem of occurrence of an ignorable error due to influence of noise. An origin offset calculation method according to the invention includes a first process of forcibly making d q-axis current command values zero; a second process of multiplying a magnetic flux component voltage command value at this time by a proportional integral gain; and a third process of storing a rotational position sensor phase error when a magnetic flux component voltage command value becomes zero being a result of the second process.
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申请公布号 |
US7023170(B2) |
申请公布日期 |
2006.04.04 |
申请号 |
US20050177594 |
申请日期 |
2005.07.11 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
YASUKAWA KOUICHI;NISHIMURA SHINJI |
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