What is Automatic ramping in VFD?
What is Automatic Ramping in a VFD?
Automatic ramping is a feature of variable frequency drives (VFDs, also called inverters) that allows the motor to be smoothly accelerated or decelerated by gradually increasing or decreasing the output frequency and voltage according to the load. This feature helps reduce stress on both the motor and the load, and improves overall efficiency and system reliability.
It is especially valuable in applications like large fans, flywheels, and systems requiring phased acceleration.
How does ramping work?
The VFD gradually adjusts the output frequency and voltage to the motor, ensuring a gentle transition between stop and full speed (or vice versa).
Ramp times can usually be set via keypad, display, or software.
Too short a ramp: Causes electrical & mechanical stress.
Too long a ramp: Reduces productivity.
Typical settings: 3–10 seconds for light loads, 10–30 seconds for heavy/fan loads.
Why use ramping?
• Conveyor systems
• Fans, blowers, pumps
• Machine tools & industrial automation
See also:
+ What is Coast (free) stop?
+ What is DC Brake?
+ What is speed search in VFD?
+ What is flying start in VFD?
+ What is STO (safe torque off)?
+ What is Automatic ramping in VFD?
Automatic ramping is a feature of variable frequency drives (VFDs, also called inverters) that allows the motor to be smoothly accelerated or decelerated by gradually increasing or decreasing the output frequency and voltage according to the load. This feature helps reduce stress on both the motor and the load, and improves overall efficiency and system reliability.
It is especially valuable in applications like large fans, flywheels, and systems requiring phased acceleration.
The VFD gradually adjusts the output frequency and voltage to the motor, ensuring a gentle transition between stop and full speed (or vice versa).
Ramp times can usually be set via keypad, display, or software.
Too short a ramp: Causes electrical & mechanical stress.
Too long a ramp: Reduces productivity.
Typical settings: 3–10 seconds for light loads, 10–30 seconds for heavy/fan loads.
Why use ramping?
• Extends the life of the motor & mechanical parts
• Prevents voltage dips, belt/pulley failures, and sudden current spikes
• Minimizes noise, vibration, and mechanical shocks
• Provides more reliable and energy-efficient operation
Typical applications:• Prevents voltage dips, belt/pulley failures, and sudden current spikes
• Minimizes noise, vibration, and mechanical shocks
• Provides more reliable and energy-efficient operation
• Conveyor systems
• Fans, blowers, pumps
• Machine tools & industrial automation
See also:
+ What is Coast (free) stop?
+ What is DC Brake?
+ What is speed search in VFD?
+ What is flying start in VFD?
+ What is STO (safe torque off)?
+ What is Automatic ramping in VFD?
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