A Current Transducer with Digital Output for Motor Drive

Autor: Sun-Ki Hong, Ki-Seok Kim, Ho-Pyo Sohn, Heekwang Lee
Rok vydání: 2021
Předmět:
Zdroj: Journal of Electrical Engineering & Technology. 17:1371-1378
ISSN: 2093-7423
1975-0102
DOI: 10.1007/s42835-021-00940-0
Popis: A current transducer is a device that converts a current measurement into a voltage. Conventional current transducers convert the measured current into an analog voltage as output. The conventional current transducer usually includes the noise generated by the impedance of the output signal. In this paper, a current transducer with digital output for motor control is proposed to overcome the problem. The proposed digital current transducer uses a SoC that includes an MCU. The transducer transmits measured current data to an inverter controller through SPI digital communication. It has no line noise and the advantage of being able to implement various additional functions including the parameter calculations with the measured current data, condition monitoring, etc. Motor control experiments were conducted to verify the suitability of the digital current transducer. The output voltage of a Hall sensor according to the output current of the inverter is converted to a digital value through the ADC function in the SoC. The converted digital value is transmitted to the motor inverter controller through SPI communication. The results were compared with those using an analog current transducer and validated the proposed transducer.
Databáze: OpenAIRE
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