Motor Current Sensing Ic

Current sensing overview chapter 1.
Motor current sensing ic. Current sensor circuit shown from the lm741 ic. Current sense amplifiers 4 texas instruments chapter 1. These sensors are automotive grade devices that can take the heat and deliver highly accurate open loop current sensing in the harshest applications environments. Current sensing is also an essential part of energy metering to ensure power efficiency and minimize environmental impact.
Current sensing solutions add valuable safety and protection features to system designs. The simplest i v converter is a resistor. If you want to see this circuit shown from the ic itself see the following. The breadboard schematic of the above circuit is shown below.
The current sensor circuit that we will build is shown below. Hall effect current sensors are widely used because they provide a non intrusive measurement and are available in a small ic package that combines the sensor and signal conditioning circuit. However the terminal resistance of a miniature motor is very low typically just a few ohms. Shunt resistors are popular current sensors because they provide an accurate measurement at a low cost.
Accurate high side current sensing is essential for automotive control systems such as electric power steering automatic gear shifting transmission control engine fuel injection control valve control in braking and active suspensions. So the lm741 chip is an 8 pin. All of these applications require precise regulation of the current through a motor or solenoid to control either the torque of the motor or the. Our high current sensor ic packages are fully integrated solutions that also provide high accuracy and reliability.
They provide information to control current in power systems and avoid overheating and short circuits.