■  product overview

The voltage of the motor driven by the frequency converter is a pulse waveform (PWM waveform), which contains rich high-frequency components. When the connection line between the frequency converter and the motor exceeds 30 meters, high-frequency driving voltage pulses will have many adverse effects on the motor, including shortened bearing life and insulation breakdown of the motor stator winding. For example, for a frequency converter with a rated voltage of 380V, the peak amplitude of the pulse voltage can exceed 1200V. This peak voltage can impact the motor thousands of times per second, quickly causing damage to the motor stator winding. In addition, the output pulse voltage of the frequency converter will also generate bearing current in the bearings of the motor. If the bearing current flows through the bearings for a long time, it will cause damage to the motor bearings.

■  Product application

HVT spike voltage absorber is an innovative product that protects the insulation of motor stator windings and bearings. HVT is installed in parallel at the power input end of the motor, which can effectively absorb the peak voltage and bearing current generated by the frequency converter on the motor, and improve the service life of the motor.

      Compared with traditional dv/dt filters or sine wave filters, HVT has the following advantages:

• Parallel installation with electric motor, simple and easy to implement
  
• No voltage drop, no torque reduction, and no impact on the control of the motor by the frequency converter
  
• Small size, light weight, high cost-effectiveness, especially for high-power motors, the advantages are even more obvious
  
• Easy to select, with automatic adjustment of absorbed power based on motor speed, carrier frequency, and cable length
  
• Built in insurance, automatically disengages from the system in case of malfunction, and displays the fault status on the panel
  
• Fully sealed design, suitable for harsh industrial site environments
  

■  Product features

The voltage of the motor driven by the frequency converter is a pulse waveform (PWM waveform), which contains rich high-frequency components. When the connection line between the frequency converter and the motor exceeds 30 meters, high-frequency driving voltage pulses will have many adverse effects on the motor, including shortened bearing life and insulation breakdown of the motor stator winding. For example, for a frequency converter with a rated voltage of 380V, the peak amplitude of the pulse voltage can exceed 1200V. This peak voltage can impact the motor thousands of times per second, quickly causing damage to the motor stator winding. In addition, the output pulse voltage of the frequency converter will also generate bearing current in the bearings of the motor. If the bearing current flows through the bearings for a long time, it will cause damage to the motor bearings.

■    技术规格

Note: If you exceed the above parameters, please contact our company.