Types of Motor Controllers for Different Applications

Posted on Nov 17, 2023 in Electronics

Applications.DC: They are directly connected to batteries in small applications. Or high torques are needed in big industrial applications. Connected to batteries: toys/car whippers. Old elevators/cranes/deployable bridges.

SERVO:

Used when high precision at positioning, speed, or acceleration is needed. Also when high torques at low frequencies. Short and repetitive working cycles. CNC milling machines-close loop/Labeling machine-close loop/Printing presses-open loop.

ASY:

Long working cycles where high precision is not needed. DOL, for motors of less than 5kW. Water pumps/vacuum cleaner/Hand drying machines.

SOFTSTARTER:

They are used to avoid mechanical shocks. Conveyor belt/fans with one velocity/crushing machine.

VFD SCALAR CONTROL:

V/f variable speed. Used when speed needs to be controlled but with low accuracy. Open loop: mixers/sawing machines(sierra)/screw conveyors. Closed loop: wind tunnels/semi-automatic grinding machines/air compressors.

VFD FLUX VECTOR CONTROL:

V/f^2 variable torque save energy(fans). They are used when speed and torque have to be controlled independently. Open loop: Treadmills(maquina de correr). Close loop: CNC/Elevator.