Variable Frequency

Variable Frequency

Smarter Power. Greater Control. Optimized Energy Efficiency.

Variable Frequency Hydraulic Pumps (VFHPs) are advanced fluid power solutions that use variable frequency drives (VFDs) to dynamically control pump motor speed based on real-time system demand. By precisely adjusting flow and pressure output, VFHPs significantly reduce energy consumption, heat generation, and component wear compared to traditional fixed-speed pumps.

At John Henry Foster (JHF), we provide expertly integrated variable frequency piston and internal gear hydraulic pump systems from industry-leading brands to help OEMs and end users enhance productivity, reduce operating costs, and future-proof their hydraulic applications.

Key Features

  • Dynamic speed control via integrated VFD

  • Energy-saving operation with reduced idle running

  • Closed-loop pressure and flow regulation

  • Low noise and heat output

  • Digital control compatibility (PLC, HMI, SCADA)

  • Flexible motor/pump configurations (AC induction, servo, etc.)

Benefits

  • Up to 70% energy savings in intermittent or variable-load systems

  • Extended pump and fluid life due to reduced heat and cycling

  • Lower total cost of ownership (TCO) through maintenance and energy reduction

  • Scalable for multiple axes or zones of control

  • Supports automation, Industry 4.0, and remote diagnostics

Typical Applications

  • Injection molding and plastics machinery

  • Hydraulic presses and forming machines

  • Machine tools and CNC systems

  • Material handling and conveyors

  • Mobile equipment with hybrid-electric systems

  • Industrial test stands and custom machinery