Invention Grant
- Patent Title: Apparatus for calculating rotational position of rotary machine
- Patent Title (中): 用于计算旋转机器旋转位置的装置
-
Application No.: US13372638Application Date: 2012-02-14
-
Publication No.: US08829829B2Publication Date: 2014-09-09
- Inventor: Hiroko Yoneshima , Yasuaki Aoki , Hideji Yoshida
- Applicant: Hiroko Yoneshima , Yasuaki Aoki , Hideji Yoshida
- Applicant Address: JP Kariya
- Assignee: Denso Corporation
- Current Assignee: Denso Corporation
- Current Assignee Address: JP Kariya
- Agency: Nixon & Vanderhye PC
- Priority: JP2011-028352 20110214
- Main IPC: H02P21/00
- IPC: H02P21/00 ; H02P6/18 ; H02P21/14 ; H02P27/08 ; H02M1/38

Abstract:
In a system, a superimposing element sets a command value vector of a high-frequency voltage signal and superimposes the high-frequency voltage signal with the command value vector on an output voltage of an inverter. The high-frequency voltage signal has a frequency higher than an electrical angular frequency of a rotary machine. The command value vector is correlated with a measured high-frequency component value of a current signal flowing in the rotary machine. A calculating element calculates a rotational angle of the rotary machine based on the measured high-frequency component value of the current signal flowing in the rotary machine. A reducing element controls at least one of the inverter and a direct voltage power supply to reduce a difference due to the dead time between the command value vector and a vector of a high-frequency voltage signal to be actually superimposed on the output voltage of the inverter.
Public/Granted literature
- US20120206077A1 APPARATUS FOR CALCULATING ROTATIONAL POSITION OF ROTARY MACHINE Public/Granted day:2012-08-16
Information query