PERIOD DETECTION MODE CONTROL DEVICE AND METHOD

Title:

PERIOD DETECTION MODE CONTROL DEVICE AND METHOD

Document Type and Number:

WIPO Patent Application WO/2015/136809

Kind Code:

A1

Abstract:

Provided are a period and phase detection mode control device and method that make it possible to accurately detect the period and phase of various periodically varying input voltages having indeterminate voltages. The present invention is provided with an AC voltage sensor (12) for detecting an input voltage from a periodically varying voltage source (11) such as an AC power supply or a half-wave or full-wave rectified power supply; a maximum value and minimum value detection unit (13) for monitoring the input voltage for a prescribed period of time and acquiring a minimum input voltage value and a maximum input voltage value; and a period and phase detection processing unit (14) that selects, on the basis of the minimum input voltage value and maximum input voltage value detected by the maximum value and minimum value detection unit (13), at least one period detection mode from among a plurality of period detection modes for detecting the timing at which the input voltage crosses one of a plurality of different threshold voltages and detecting the period and phase of the input voltage, and uses the selected period detection mode to detect the period and phase of the input voltage.

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Inventors:

ITO MASAYUKI (JP)

Application Number:

PCT/JP2014/083429

Publication Date:

September 17, 2015

Filing Date:

December 17, 2014

Export Citation:

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Assignee:

TOYOTA JIDOSHOKKI KK (JP)

International Classes:

G01R23/02; G01R19/00; H02M7/12

Foreign References:

JP2012145428A	2012-08-02
JP2006025550A	2006-01-26