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AN4043 데이터시트(PDF) 28 Page - STMicroelectronics

부품명 AN4043
상세설명  In recent years the variable speed motor control market has required high performance
PDF  60 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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AN4043 데이터시트(HTML) 28 Page - STMicroelectronics

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Electrical characteristics and functions
AN4043
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Doc ID 022726 Rev 2
2.3.10
Op amps for advanced current sensing
The fully featured version of the SLLIMM-nano (STGIPN3H60) integrates also one
operational amplifier optimized for field oriented control (FOC) applications. In a typical FOC
application the currents in the three half bridges are sensed using a shunt resistor. The
analog current information is transformed into a discontinuous sense voltage signal, having
the same frequency as the PWM signal driving the bridge. The sense voltage is a bipolar
analog signal, whose sign depends on the direction of the current (see
Figure 18):
Figure 17.
Example of SC event



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