MEASUREMENT METHOD FOR ANTIPHASE COMPONENT OF THREE-PHASE ALTERNATING CURRENT

Title:

MEASUREMENT METHOD FOR ANTIPHASE COMPONENT OF THREE-PHASE ALTERNATING CURRENT

Document Type and Number:

Japanese Patent JPH0674984

Kind Code:

A

Abstract:

PURPOSE: To provide a method enabling an antiphase component to be accurately obtained, even when the frequency of three-phase alternating current deviates from the standard frequency.

CONSTITUTION: This is a measurement method where current in each phase of three-phase alternating current is selected, data is obtained by sampling the selected current, using a frequency as high as the standard frequency of the three-phase alternating current by an integral number, and then the data is subjected to Fourier conversion for separation into vectors and obtaining an antiphase component. In this case, two antiphase components having a 90-degree sampling phase difference are measured. The antiphase components so obtained are vector added and averaged, thereby obtaining an antiphase component.

More Like This:

JPH01316673	SENSOR SIGNAL DISCRIMINATING CIRCUIT FOR ZERO-PHASE-SEQUENCE CURRENT AND VOLTAGE
JPS6042660	THREE-PHASE ALTERNATING-CURRENT SYMMETRY DETECTOR
JPS60253880	MEASUREMENT OF ZERO-PHASE VOLTAGE BY OPTICAL APPLICATION

Inventors:

TSUNODA TAKANORI
YOSHIMURA TAKASHI
TANO YOSHIHIRO

Application Number:

JP22991192A

Publication Date:

March 18, 1994

Filing Date:

August 28, 1992

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NISSIN ELECTRIC CO LTD

International Classes:

G01R29/16; (IPC1-7): G01R29/16

Attorney, Agent or Firm:

Kenzo Hara

Next Patent: MEASUREMENT DEVICE FOR ELECTRO STATIC CHARGE OF TONER AND MEASUREMENT METHOD THEREFOR