Crane VFD systems

Variable Frequency Drives

“A PROCRANE VFD’s get Smooth operations and Smart Motor Controls for Overhead Cranes. VFD’s can be used to control every motorized motion on an overhead crane-including the hoist, bridge, trolley, and even hook rotation”.

DBR (Dynamic Braking Resistors)

“A PROCRANE DBR (Dynamic braking resistors) produce braking torque and absorb the high amounts of energy generated by stopping electric motors. They are used in variable-speed drive systems such as cranes, Elevators & etc. Some DBRs are also used in related devices with high inertial loads”.

Encoder

“A PROCRANE For the crane main hoist, Laine Linde’s incremental encoders are used for speed and position monitoring and to detect overspeed, under speed or standstill. Absolute encoders mounted on the drum provides position data and to provide speed related alarms, sometimes through a separate speed monitor”.

Drive Choke

“A PROCRANE Drive choke purpose is to reduce the current peaks that occur at the drive output due to pulse-width modulation (PWM) of the voltage. A motor choke is an inductive device placed between the drive and the motor and is often recommended when the motor cable length exceeds 25 meters”.