660V Medium Voltage Variable Frequency Drives for Conveyor

660V Medium Voltage Variable Frequency Drives for Conveyor

Conveyors are used in a broad range of industries and applications to move packaged goods, assemblies, process byproducts, or any material from one place to another. A process designer will typically look for opportunities to use the force of gravity to accomplish product movement. Electric motors are commonly used when gravity cannot be employed or when the speed of a gravitational fall needs to be controlled.Airports, mines, cement plants, distribution facilities, assembly, and food processing plants all utilize conveyors. Conveyors are typically constant torque loads, meaning the required torque to drive a conveyor is independent of speed. A fixed amount of torque is also required to overcome the frictional, or machine drag, portion of the total load. Conveyors can have nominal amounts of friction and machine inertia for which to compensate.

Application Challenges

· Motor and Drive sizing
Conveyors requires a good deal of load and speed calculations,  combined with actual testing to ensure proper size (power) requirements.

· Smooth product motion
Acceleration/Deceleration times combined with S-Curve “smoothing” characteristics need fine-tuning to ensure the product is not damaged and/or moved out of position for staging to subsequent processes.

· Rapid deceleration or downhill speed control of conveyors cause load regeneration in drives. 
Care should be taken to ensure proper sizing of a drive’s dynamic braking package or regenerative converter,  to prevent drive overvoltage faults.

· Electronic Gearing
Follow an external encoder to synchronize conveyor with other sections of the process

· Coordinate conveyor motion with external machine axes

Reduce application development time

Features of G7 matching conveyor application

Power range of G7 VFD

Voltage: 660VAC (450VAC – 690VAC)

Power: 22kw/30HP – 400kw/535HP

Specification of G7 VFD