Title :
A current sensor of high accuracy fit for precise and exact motion control
Author :
Sonoda, T. ; Ueda, R. ; Koga, K.
Author_Institution :
Kyushu Inst. of Technol., Kitakyushu, Japan
Abstract :
A current sensor of high-accuracy fit for precise and exact motion control, particularly appropriate for the control of an AC-servo drive system, is presented. The proposed sensor, named for the sensing principle it uses, is called the magnetic-field-controlled type and has the ability to fulfil the following specifications: (i) the sensor is a noncontacting type; (ii) the operating frequency ranges from DC to several hundred hertz; (iii) the dynamic range can be extended from several milliamperes to 100 A; (iv) a detection accuracy of 0.01% full-scale is guaranteed over the whole range; and (v) a sensor of the same detection characteristics is easily obtainable and is applicable to each phase current sensing for three phases.<>
Keywords :
electric current measurement; electric drives; electric sensing devices; position control; servomotors; AC-servo drive system; current sensor; exact motion control; high-accuracy fit; magnetic-field-controlled sensor; Amorphous materials; Helium; Magnetic cores; Magnetic fields; Magnetic flux; Magnetic materials; Magnetic sensors; Motion control; Motion detection; Voltage;
Conference_Titel :
Industry Applications Society Annual Meeting, 1989., Conference Record of the 1989 IEEE
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/IAS.1989.96674
