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- FAQ > Drive Products > Inverters-FREQROL > FREQROL-A024
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FAQ within [ FREQROL-A024 ]
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Energy saving effect of inverter operation
Energy saving operation of the inverter is represented by comparison with commercial power supply operation. For example, to control air volume of an air co... More Details >>
- No:21622
- Release Date:2018/08/22 16:28
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Inverter drive of 400 V class motor
When the wiring between the inverter and motor is long, surge voltage occurs at the terminal of the motor.This surge voltage deteriorates insulation of the m... More Details >>
- No:21926
- Release Date:2018/08/22 16:30
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Output side earth (ground) fault overcurrent protection
1. How much is the sensitivity current? When the sum of the three-phase output current of the inverter reaches approximately 70% of the inverter rated curren... More Details >>
- No:21394
- Release Date:2018/08/22 16:27
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Features of parameter unit FR-PU03
This parameter unit realizes both easy operation and advanced operation. In normal operation, you only need to use six keys for easy operation. To perform ad... More Details >>
- No:21614
- Release Date:2018/08/22 16:28
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Synchronous operation of two motors
When synchronously operating two motors, you need to detect speed from both motors. Each inverter is controlled based on this speed detection signal. As an e... More Details >>
- No:21540
- Release Date:2018/08/22 16:28
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Driving 200 V motor by 400 V inverter
A 400 V inverter does not operate when 200 V is supplied to it, therefore the motor does not rotate. A 200 V motor can be rotated by a 400 V inverter, howeve... More Details >>
- No:21446
- Release Date:2018/08/22 16:27
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When the wire between the 400 V inverter and motor is long (20 m or longer), surge voltage occurs momentarily. This voltage is as two or more times as the DC... More Details >>
- No:21404
- Release Date:2018/08/22 16:27
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General-purpose magnetic flux control
Almost same control method. This control also performs vector calculation and divides the inverter's output current into an excitation current and into a tor... More Details >>
- No:21620
- Release Date:2018/08/22 16:28
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You can vary the carrier frequency within the range of 0.7 to 14.5 kHz, and it is initially set to 1 kHz that generates low noise and leakage current. You ca... More Details >>
- No:21607
- Release Date:2018/08/22 16:28
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Countermeasure against noise and leakage current during low-noise operation
The following two major countermeasures against noise are available: - Keep the noise source and partner device apart from each other.- Install a noise filte... More Details >>
- No:21605
- Release Date:2018/08/22 16:28
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