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User Defined Function setting file for Ld/Lq Measurement
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【1. Overview】
・This file is a User-Defined-Function setting file designed to calculate the d-axis and q-axis inductances (Ld, Lq) of motors using our power analyzers.
・It can be used to display Ld and Lq parameters in real time on the main screen of the power analyzer.


【2. Supported Models】
・PW4001
・PW8001


【3. Folder and File Structure】
・PW4001/			: Folder for PW4001
　　|_LdLq.JSON 		: User-defined computation setting file for PW4001
　　|_PW4001_Screen img.PNG 	: Example screen image

・PW8001/ 			: Folder for PW8001
　　|_LdLq.JSON　　　　　　　	: User-defined computation setting file for PW8001
　　|_PW8001_Screen img.PNG 	: Example screen image


【4. How to Use】
1.Extract the folder and files, then save the data to a USB drive or FTP server.
2.Press the [INPUT] button on the power analyzer, and touch [UDF] on the screen.
3.Touch [Load file] and select the relevant .JSON file.
4.After touching [OK], the user-defined computation formulas for Ld and Lq will be applied to the analyzer.


【5. Notes】
・This user-defined computation setting file assumes the use of CH1–CH3. Please modify the parameters as necessary.
・Configure the motor input parameters appropriately based on your measurement targets.
・The values for the induced voltage constant (Ke) and armature resistance (R) are set as placeholders.
　Please input the correct values based on actual measurement results.


【6. Reference Materials】
・Application Notes	… Measurement Guide of the motor parameters Ld and Lq
・Technical Notes	… Method for Identifying PMSM Parameters
・Manuals		… PW4001, PW8001


【7. Disclaimer】
・This file is provided for reference purposes only, and our company assumes no responsibility for the results of its use.
・Please verify settings according to your measurement conditions.
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(c) 2025 HIOKI E.E. CORPORATION
All rights reserved.
