Benshaw Ball Mill Positioning Solution

This brochure from Benshaw details an advanced low-voltage AC variable frequency drive (VFD) solution for positioning large ball mills powered by medium voltage synchronous motors. By replacing older DC contactor and cam-switch systems, the Benshaw drive delivers smoother operation, precise positioning, faster inching, and reduced maintenance costs — offering a reliable, energy-efficient control method for heavy industrial applications.

Key Points

  • Purpose: Describes how Benshaw’s H2 Series Low Voltage VFD provides precise DC inching and positioning for large synchronous ball mill motors.
  • System Efficiency: Replaces obsolete DC contactors, cam switches, and motor-generator sets with a single AC VFD solution.
  • Reliability: Provides full torque at zero speed, ensuring stable positioning without stressing the motor or drivetrain.
  • Proven Experience: Over 100,000 HP of installed ball mill motor control base and 30+ years of Benshaw expertise.
  • Performance Boost: Increased inching speed by 30x, enabling faster maintenance cycles and improved uptime.
  • Cost Savings: Reduces electrical, mechanical, and maintenance costs through smoother torque application and lower energy use.
  • Turnkey Integration: Works seamlessly with Benshaw’s medium-voltage solid-state starters and synchronous exciter packages.
  • Applications: Ideal for cement, mining, and material processing facilities using large rotary mills.