In motion control applications, you frequently hear all sorts of loops -- open, closed, current, torque, speed, voltage, and so on. Here, we define and explain these terms.

The compact, single-box design with an integrated controller and driver provides a low-cost solution for driving New Focus open-loop Picomotor products. The new module can be computer controlled with ...

Closing the current loop. Closing the current loop of a totem-pole bridgeless PFC is not as straightforward as in a traditional PFC; it may also vary from controller to controller. This power tip can ...

Open-loop current sensors have a definite price advantage over closed-loop counterparts. While you can use them in drive applications where torque accuracy isn't demanding — such as pump and fan ...

It is estimated that 40% to 60% of the ac motor applications would benefit from some form of closed-loop, smart speed control. Closed-loop control allows single-phase ac motors to close the gap in ...

Open-loop heating. Open-loop heating uses manual manipulation to regulate temperature. There is very limited feedback or control features for temperature control. Open-loop heating regulation is ...