SVC Control Air Supply Blower Variable Frequency Drive for Fan Motor Three Phase

ACI Constant Pressure Air Supply Blower Dedicated Converter

The constant pressure air supply type fan frequency converter developed and produced by our company is a frequency conversion speed control device specially designed for fans, aiming to achieve constant air pressure output and optimize system energy efficiency by adjusting the fan speed. Its core functions include pressure closed-loop control, energy-saving operation, soft start, and multi-level protection mechanism, which are widely used in industrial ventilation, building air conditioning, environmental protection equipment, and other fields.

The constant pressure air supply fan frequency converter monitors the air duct pressure in real time through a built-in pressure sensor and compares it with the set value. Using PID control algorithm to dynamically adjust the output frequency of the frequency converter, thereby changing the fan speed. When the system pressure is lower than the set value, the frequency converter increases the output frequency to increase the air volume; When the pressure is higher than the set value, reduce the frequency to decrease the air volume and ensure stable air pressure.

Key functional features

• Constant voltage control
  Accurate adjustment of wind pressure is achieved through pressure closed-loop control, with a fluctuation range typically ≤ ± 1%.
  Support multi-point pressure setting to adapt to different working conditions.
• Energy saving operation
  Automatically adjust the speed according to actual air volume requirements to avoid the phenomenon of "big horse pulling small car", with an energy-saving rate of up to 20%~50%.
  Equipped with sleep mode, it automatically reduces the speed or stops at low loads, further reducing energy consumption.
• Soft start and soft parking
  The starting current is ≤ 1.5 times the rated current to reduce the impact on the power grid and machinery.
  Gradually reduce the speed when parking to avoid water hammer effect or mechanical vibration.
• Multi level protection mechanism
  Overload protection: automatically limits output current to prevent motor overheating.
  Overvoltage/undervoltage protection: Monitor the voltage of the power grid and automatically shut down in case of abnormalities.
  Phase loss protection: detects three-phase input, immediately alarms and shuts down when there is a phase loss.
  Ground fault protection: Real time monitoring of ground current to ensure equipment safety.
• Communication and Scalability
  Supports communication protocols such as Modbus and Profibus, and can be connected to PLC or upper computer systems.
  Provide I/O interfaces for easy connection to external sensors or actuators.

Application

• Industrial ventilation system
  Used for constant pressure air supply in factory workshops, mines, and other places to ensure stable environment.
• Building air conditioning system
  Cooperate with the central air conditioning system to achieve constant pressure regulation of fresh air volume and improve comfort.
• Environmental Protection Equipment
  Applied to dust collectors, desulfurization and denitrification systems, etc., to maintain stable air duct pressure and improve processing efficiency.
• Agricultural greenhouse
  Provide constant ventilation for the greenhouse and optimize the crop growth environment.