Title:
MOTOR CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/043245
Kind Code:
A1
Abstract:
This motor control device MS comprises: a control unit BC that performs sensorless control of a brushless motor BM having three phases; and a determination unit BH that determines the presence or absence of step-out of the brushless motor BM by comparing a determination threshold value Hs with a deviation hV between a determination voltage Vqj calculated from a rotational speed ω of the brushless motor and an estimated q-axis indicator voltage Vqc. A calculation map Zhs that is used for calculating the determination threshold value Hs is set by the determination unit BH to exceed a characteristic Zes of a first error Es included in the sensorless control in a state in which the brushless motor BM is not out of step. For example, the calculation map Zhs is set by the determination unit BH sets such that the determination threshold value Hs is determined to be higher commensurately with an increase in the rotational speed ω.
Inventors:
KAWAMURA HIKARU (JP)
Application Number:
PCT/JP2023/030215
Publication Date:
February 29, 2024
Filing Date:
August 22, 2023
Export Citation:
Assignee:
ADVICS CO LTD (JP)
International Classes:
H02P6/12; H02P6/18
Domestic Patent References:
| WO2015097734A1 | 2015-07-02 |
Foreign References:
| JP2018143035A | 2018-09-13 | |||
| JP2006149122A | 2006-06-08 | |||
| JP2022117302A | 2022-08-10 |
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