ZFeng 900 Series 110Kw-T-P General Vector Variable Frequency Drive

The working principle of a frequency converter is based on the on-off function of power semiconductor devices, which achieves speed control of the motor by changing the frequency and voltage of the motor's working power supply. Its main components include:

• Rectifiers: convert input AC power into DC power.
• Filter: Filter the DC power output from the rectifier to remove pulsating components and improve power quality.
• Inverter: Convert filtered DC power into AC power with adjustable frequency and voltage, and supply it to the motor.
• Control circuit: responsible for receiving external control signals, controlling the inverter, and implementing various protection functions for the motor

Core functions

• Speed regulation function: The frequency converter can infinitely adjust the motor speed within the range of 0-100% according to actual needs, meeting the requirements of various production processes.
• Energy saving function: By adjusting the speed of the motor, the frequency converter can reduce the energy consumption of the motor and improve energy utilization efficiency. Especially in square torque loads such as fans and pumps, the energy-saving effect is particularly significant.
• Protection function: The frequency converter has multiple protection functions such as overcurrent, overvoltage, overload, and overheating, ensuring that the motor can be safely stopped in case of abnormal conditions and avoiding equipment damage.

Selection and Installation

• Selection: When choosing a frequency converter, factors such as motor type, power, speed range, accuracy requirements, and working environment need to be considered. At the same time, it is also necessary to pay attention to whether the rated input voltage, output voltage, output frequency, rated power and other parameters of the frequency converter match the motor.
• Installation: The frequency converter should be installed in a well ventilated area with excellent heat dissipation conditions, avoiding installation in damp, dusty, and vibrating environments. At the same time, attention should be paid to the grounding and electromagnetic compatibility of the frequency converter to ensure the stable operation of the equipment.