OVERLOAD PROTECTION DEVICE, GEARED MOTOR, AND METHOD FOR CALCULATING TORQUE CONVERSION VALUE FOR MOTOR

Title:

OVERLOAD PROTECTION DEVICE, GEARED MOTOR, AND METHOD FOR CALCULATING TORQUE CONVERSION VALUE FOR MOTOR

Document Type and Number:

WIPO Patent Application WO/2020/204034

Kind Code:

A1

Abstract:

Provided is an overload protection device that can control overload of a motor by means of more accurate torque values.　An overload protection device that comprises a current measurement means that sequentially measures the current flowing in a motor and acquires a current measurement value, a voltage measurement means that sequentially measures the voltage of the motor and acquires a voltage measurement value, a power supply interruption means that interrupts or reduces the supply of power from a power supply to the motor, a storage unit that stores a motor characteristic lookup table that comprises a data group of current values, voltage values, and torque values that have been collected for the motor in advance, and a control unit that controls the operations of the current measurement means, the voltage measurement means, and the power supply interruption means. The control unit references the lookup table from the storage unit and, on the basis of time-series data for the current measurement value and the voltage measurement value, sequentially outputs a torque conversion value for the motor. Upon detecting that the torque conversion value has exceeded a preset prescribed interruption threshold value or has reached the prescribed interruption threshold value, the control unit uses the power supply interruption means to interrupt or reduce the power supply.

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Inventors:

KODUKA YOSHIHIRO (JP)
SAITO YUSUKE (JP)
MIZUSHINA AKIRA (JP)

Application Number:

PCT/JP2020/014834

Publication Date:

October 08, 2020

Filing Date:

March 31, 2020

Export Citation:

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Assignee:

FUJI HENSOKUKI KK (JP)

International Classes:

H02P3/18; H02P29/024

Foreign References:

JP2000228822A	2000-08-15
JP2017046368A	2017-03-02
JP2001245490A	2001-09-07
JP2015073352A	2015-04-16
JP2015023635A	2015-02-02

Attorney, Agent or Firm:

HIROE AND ASSOCIATES, PATENT PROFESSIONAL CORPORATION (JP)

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