Belt Conveyor
INVT Belt Conveyor Solution integrates low-frequency heavy-duty motor starting, long-cable drive, CAN-based multi-machine power balancing and fast master-slave switching.
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Industry Challenges
01
Heavy-duty start/stop: Failure to start under low-frequency heavy load leads to reduced system productivity.
02
Long-distance transmission: Insulation damage to cables and motors.
03
Multi-machine imbalance: Degraded system load capacity.
04
Master-slave switching: Fast master-slave or single-machine switching upon single-unit failure without production interruption.
INVT Solution
Belt Conveyor
The four Medium-voltage permanent magnet direct-drive integrated VFD units for the belt conveyor are set as the master unit (#1) and slave units (#2, #3, #4) respectively. High-speed bus communication is adopted between the master and slaves, which can automatically adjust their outputs to achieve dynamic power balance.
View Larger ImageSolution Highlights
Wide grid design of ±15%, adapting to the harsh grid environment of the mine.
Low-speed permanent magnet synchronous motor with open-loop vector control.
200% heavy-duty starting of the motor at low frequency.
Flexible belt connection with CAN master-slave communication.
Customer Benefits
01Control Layer
200% torque overcomes coal gangue jamming, zero slippage during heavy-duty start-stop, and greatly reduces stall shutdowns.
02Transmission Layer
Three-level design supports long-cable applications, eliminating motor terminal overvoltage and harmonic risks that reduce motor service life.
03Collaboration Layer
CAN master-slave dynamic torque distribution, four-machine power deviation ≤ 3%, balanced belt tension, and significantly reduced belt breakage risks.
04Wide Voltage Range
Wide voltage range design solves the problems of large voltage fluctuations in coal mines and frequent equipment failures, shutdowns and production halts.
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