• Motor current higher than recommended could cause damage to the bearings through
decoupling of the mixing head.
Variable-Frequency Drive
A variable frequency, adjustable-speed drive (VFD) controls the rotational speed of an
alternating current (AC) electric motor by controlling the frequency of the electrical
power supplied to the motor. VFDs are also known as adjustable-frequency drives (AFD),
variable speed drives (VSD), AC drives, and inverter drives.
When starting a motor, a VFD initially applies a low frequency and voltage to the motor.
A VFD increases the applied frequency and voltage at a controlled rate and accelerates
the load without drawing excessive current.
Sine Wave
Power
Operator
Interface
VDF system
Power Conversion
Variable
Frequency
Power
Variable
Frequency
Controller
Mechanical
Power
AC Motor
1540
Power Conversion
Notes
• Consult the parameters settings and curcuit and terminal diagrams before installing
the control cabinet.
• Validate the current media and process conditions. If the production conditions
are in any way altered after commissioning of the mixer, a new validation must be
performed.
• Validate the possible maximum and minimum operating speed for each process.
• Set VFD unit to 100% nominal power (kW) and current (A) of the motor rating.
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Summary of Contents for NovAseptic GMP
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