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3HAC025338-006/08 In the servo drive speed closed loop, the real-time speed measurement accuracy of the motor rotor is crucial to improving the dynamic and static characteristics of the speed control of the speed loop.

3HAC025338-006/08 In order to seek a balance between measurement accuracy and system cost, incremental photoelectric encoders are generally used as speed measurement sensors, and the corresponding commonly used speed measurement method is the M/T speed measurement method.

3HAC025338-006/08 Although the M/T speed measurement method has certain measurement accuracy and a wide measurement range, this method has its inherent flaws, which mainly include: 1) At least one complete code disk pulse must be detected within the speed measurement cycle, which limits the minimum Rotation speed can be measured; 2) The two control system timer switches used for speed measurement are difficult to maintain strict synchronization, and speed measurement accuracy cannot be guaranteed in measurement situations with large speed changes.

3HAC025338-006/08 Therefore, the traditional speed loop design using this speed measurement method is difficult to improve the speed following and control performance of the servo drive.

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ACS 143-1K6-3-C   1

FASCO 71732132   1

UZELN250/600   1

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GCI05001   1

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YASKAWA ELECTRIC USA-MED-30MA2SE  USAMED30MA2SE

YASKAWA ELECTRIC CIMR-P5U20550F  CIMRP5U20550F

WESTINGHOUSE Y60M24T30N  Y60M24T30N

WESTINGHOUSE PC-700A-10-103003  PC700A10103003

ULTRASONIC GENERATORS SGM3512PB-1  SGM3512PB1

UBE INDUSTRIES DDVC/HV-J1  DDVCHVJ1

TOSHIBA VT130E3U430K  VT130E3U430K

THOMSON INDUSTRIES 345115546300  345115546300

TELEMECANIQUE XGSC5142311  XGSC5142311

TELEMECANIQUE TSX-P107455  TSXP107455

TAYLOR ELECTRONICS 6024BP10300C  6024BP10300C

TA INSTRUMENTS 931001.901  931001901

SYMAX 8030-CRM-565  8030CRM565

STROMBERG SAFUS75F400  SAFUS75F400

SQUARE D S174A  S174A

SQUARE D MHP3-6400  MHP36400

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SIEMENS 6SE7-024-7TD51  6SE70247TD51

SIEMENS 6SE7-022-7EP70  6SE70227EP70

SIEMENS 6RA2-418-2FS22  6RA24182FS22

SIEMENS 6FC5112-0EA03-0AA0  6FC51120EA030AA0

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ROFIN SINAR 120100366  120100366

REXROTH DM-15K-4101-D  DM15K4101D

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RELIANCE ELECTRIC 803602-SE  803602SE

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RELIANCE ELECTRIC 615055-1V  6150551V

RELIANCE ELECTRIC 57C-330-C  57C330C

RELIANCE ELECTRIC 45C-410  45C410

RELIANCE ELECTRIC 45C-340  45C340

RELIANCE ELECTRIC 40V2060  40V2060

RELIANCE ELECTRIC 0-60028-2  0600282

PSC INC 1803011-2  18030112

OVATION D920801G17  D920801G17

OVATION D920801G16  D920801G16

OVATION D920801G15  D920801G15

OVATION D920801G13  D920801G13

OVATION D920801G12  D920801G12

OVATION D920801G11  D920801G11

OVATION D920801G10  D920801G10

OVATION D920801G08  D920801G08

OVATION D920801G07  D920801G07

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OMRON CFP0269  CFP0269

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NH RESEARCH 1107095  1107095

NEC C-526  C526