Motor Current Sensing Ic

The current sensor circuit that we will build is shown below.

Motor current sensing ic.

So the lm741 chip is an 8 pin. One method is simply to purchase a current sensing ic however the same functionality can be achieved with a few common components. Current sensing overview 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.

They provide information to control current in power systems and avoid overheating and short circuits. Current sense amplifiers 4 texas instruments chapter 1. 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. If you want to see this circuit shown from the ic itself see the following.

Current sensing is also an essential part of energy metering to ensure power efficiency and minimize environmental impact. The simplest i v converter is a resistor. Shunt resistors are popular current sensors because they provide an accurate measurement at a low cost. Current sensing solutions add valuable safety and protection features to system designs.

Current sensing overview how integrated resistor current sensors simplify pcb designs the most common way to measure current is to sense. However the terminal resistance of a miniature motor is very low typically just a few ohms. We only connect 5 out of the 8 pins. The breadboard schematic of the above circuit is shown below.

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.