MOTOR CONTROL DEVICE - SANDEN CORP

Title:

MOTOR CONTROL DEVICE

Document Type and Number:

WIPO Patent Application WO/2012/144290

Kind Code:

A1

Abstract:

The present invention relates to a motor control device provided with the function of detecting the rotor position of a synchronous rotor in a sensor-less fashion. The motor control device records ahead of time a current phase (β) stipulated by the two parameters that are an induced voltage wave height (Ep) and the subtracted value (θe-θi) resulting from subtracting an induced voltage electrical angle (θe) from a current electrical angle (θi), and on the basis of the actual detected Ep, θi, and θe, selects β by referring to the β recorded ahead of time, and calculates the rotor position (θm) by subtracting the selected β from the actual detected θi. Then, when selecting β, the actual detected Ep and θe are corrected in accordance with changes in the current flowing through the coil. As a result, detection precision of rotor position during a transition period is increased.

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Inventors:

HIRONO DAISUKE (JP)

Application Number:

PCT/JP2012/057542

Publication Date:

October 26, 2012

Filing Date:

March 23, 2012

Export Citation:

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Assignee:

SANDEN CORP (JP)
HIRONO DAISUKE (JP)

International Classes:

H02P6/18; H02P6/06; H02P6/08; H02P6/17; H02P6/182; H02P21/00; H02P23/16; H02P27/04; H02P27/08

Foreign References:

JP2011010438A	2011-01-13
JP2006054930A	2006-02-23
JP2011010438A	2011-01-13

Other References: