Proportional Hydraulics

Proportional Hydraulics Course (Code TPS)

  • To introduce students to the principles and practices of proportional control
  • Introduction to the study of circuit construction and circuit components
  • To introduce basic principles of design of proportional systems

1. Aims

  1. Students will gain knowledge of both analogue and digital proportional systems
  2. Students will gain knowledge of both open and closed loop proportional systems
  3. For student to become familiar with set-up procedures on proportional systems
  4. For students to become familiar with maintenance and fault finding techniques on proportional hydraulic systems

2. Itinerary

Day one

  • Valve construction and operation
  • Types of proportional control devices
  • Pressure relief
  • Flow control
  • Direction control
  • Hydraulic symbols
  • Spool configurations
  • Selection & sizing with reference to manufacturer’s data
  • Electrical operation
  • Types of proportional control devices
  • Basic electrical circuits and operation
  • Solenoid design
  • Comparison between conventional and proportional valves
  • Methods of control
  • Comparison between analogue and digital control

Day two

  • Proportional Attributes
  • Ramp
  • Gain
  • Deadband
  • Dither
  • Pulse width modulation
  • Amplifier cards
  • Principles of operation
  • Design and application
  • Analogue and digital
  • Closed Loop
  • Internal and external feedback devices
  • Operation and application of closed loop systems

Day three

  • Integrated Electronics Option Frequency Response
  • Principles of operation
  • Bode diagrams and their use in manufacturer’s data
  • PID control
  • Practical Exercises
  • Commissioning and set-up procedures
  • Open loop circuits
  • Closed loop circuits
  • Interface to the control


Jim Hickey – Managing Director
Mobile: +353 (0)87 2782348

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