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Comparison of the speed change rate
Please tell me the speed change rate when the motor is driven by the inverter. Using motor: 18.5 kW 4P 200 V 60 Hz Example: Motor with encoder + A520 + A5AP???Catalog value 0.02% 1: Standard (SF-JR) variable torque characteristic motor + A520 (V/F) 2: SF-JRCA constant-torque motor + A520 (Advanced magnetic flux vector) *I would like to compare the accuracy against the base 1800 rpm.
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Answer
Speed fluctuation ratio differs depending on the control method as follows.
- V/F control?????????2 to 5% (At the encoder feedback: 0.02%)
- General-purpose magnetic flux vector control?????2 to 5%
- Magnetic flux vector control???????1% (At the encoder feedback: 0.02%)
- Advanced magnetic flux vector control 1% (At the encoder feedback: 0.02%)
- Vector control?????????0.01%
Accordingly, the speed fluctuation ratio is as follows:
1: Standard (SF-JR) variable-torque characteristics motor + A520 (V/F) ???Speed fluctuation ratio 2 to 5%
2: SF-JRCA constant-torque motor + A520 (Advanced magnetic flux vector) ???Speed fluctuation ratio 1%
- V/F control?????????2 to 5% (At the encoder feedback: 0.02%)
- General-purpose magnetic flux vector control?????2 to 5%
- Magnetic flux vector control???????1% (At the encoder feedback: 0.02%)
- Advanced magnetic flux vector control 1% (At the encoder feedback: 0.02%)
- Vector control?????????0.01%
Accordingly, the speed fluctuation ratio is as follows:
1: Standard (SF-JR) variable-torque characteristics motor + A520 (V/F) ???Speed fluctuation ratio 2 to 5%
2: SF-JRCA constant-torque motor + A520 (Advanced magnetic flux vector) ???Speed fluctuation ratio 1%
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- Inverter, magnet motor drive
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