# US 2017/0288591 A1 · Apparatus for correcting current reference > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0288591 A1 - Document ID: US20170288591A1 - Status: Published application - Kind: A1 - Application number: 15/383,275 - Filed: 2016-12-19 - Published: 2017-10-05 - Earliest claimed: 2016-04-01 - Assignees: Lsis Co., Ltd. - Applicants: Lsis Co., Ltd. - Inventors: Mi-Rim JEON - Web page: https://patentgrep.com/patent/US20170288591A1 ## CPC - H02P 25/02: characterised by the kind of motor - G01R 19/25: using digital measurement techniques - H02P 21/04: specially adapted for very low speeds - H02P 21/14: Estimation or adaptation of machine parameters, e.g. flux, current or voltage - H02P 21/22: Current control, e.g. using a current control loop - H02P 27/06: using DC to AC converters or inverters (H02P27/05 takes precedence) - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) ## Abstract The present disclosure relates to an apparatus for correcting a current reference, and more particularly, to an apparatus for correcting a current reference including a calculation unit configured to set a first torque reference section and a second torque reference section using candidate values of a correction factor that corrects the current reference so as to enable the current reference to satisfy rated operating conditions of the induction machine, and calculate the correction factor according to a section, in which the torque reference is included, of the first torque reference section and the second torque reference section, and a correction unit configured to correct the current reference using the correction factor. ## Claims ### Claim 1 An apparatus for correcting a current reference generated based on a torque reference so as to control torque of an induction machine, comprising: a calculation unit configured to set a first torque reference section and a second torque reference section using candidate values of a correction factor that corrects the current reference so as to enable the current reference to satisfy rated operating conditions of the induction machine, and calculate the correction factor according to a section, in which the torque reference is included, of the first torque reference section and the second torque reference section; and a correction unit configured to correct the current reference using the correction factor. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the calculation unit calculates the torque reference when a minimum value of the correction factor satisfying a rated slip frequency condition of the induction machine among the rated operating conditions is the same as that of the correction factor satisfying a minimum excitation current condition of the induction machine among the rated operating conditions, as a criterion torque reference. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the calculation unit calculates the criterion torque reference using the following Equation: Te,ref=2×Kc1,min2×100, wherein Te,ref is the criterion torque reference, and Kc1,min is the minimum value of the correction factor satisfying the minimum excitation current condition of the induction machine. ### Claim 4 (depends on 2) The apparatus of claim 2, wherein the calculation unit sets a torque reference section less than the criterion torque reference to the first torque reference section, and a torque reference section equal to or greater than the criterion torque reference to the second torque reference section. ### Claim 5 (depends on 2) The apparatus of claim 2, wherein the calculation unit calculates a minimum value of candidate values of the correction factor satisfying the minimum excitation current condition of the induction machine as the correction factor when the torque reference is included in the first torque reference section. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the calculation unit, when the torque reference is included in the first torque reference section, calculates the correction factor using the following Equation: K=Kc1,min (0