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Motors and Drives

May 2017 Previous month
Any motor control solution requires a more or less precise measurement of the phase currents. Especially sensorless motor drives for three phase motors rely heavily on accurate measurement results. The easiest and hence most common method to measure this current is by using a shunt resistor on the low side of the phase leg of the inverter bridge. When you are choosing the op amp you have the challenge to find the right part for your application. This can be difficult especially if you donR ...