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Inverter peak voltage absorber
HVT-A4
Inverter peak voltage absorber

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 between the frequency converter and the motor exceeds 30 meters, high-frequency driving voltage pulses can 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.

SPECIFICATIONS

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, greatly.

Compared with traditional du/dt filters or sine wave filters, HVT has the advantages of 1. Parallel installation with electric motor, simple and easy to implement; 2. No voltage drop, no reduction in torque, and no impact on the control of the motor by the frequency converter; 3. Small size, light weight, high cost-effectiveness, especially for high-power motors, the advantages are more obvious; 4. Convenient selection, independent of motor speed and carrier frequency, without the need to match with specific power motors; 5. Intelligent control, automatically adjusts the absorbed power according to the carrier frequency and cable length to ensure optimal performance; 6. Built in insurance, automatically disengages from the system in case of malfunction, and displays the fault status on the panel; 7. Fully sealed design, suitable for harsh industrial site environments.

Product Features

  • Solve the problem of frequency converter burning out themotor stator winding; 

  • Real time detection of peak voltage and rapid absorption of peaks;

  • Intelligent control of energy absorption valves to maximize absorption capacity.;

  • IGBT technology controls the absorption of peak voltage energy, ensuring clean and thorough absorption of peak;

  • The bearing current absorption circuit greatly extends;

  • The intelligent control module does not require an external power supply to operate; 

  • Display the work status panel to keep track of the work status at any time; 

  • Parallel installation with motor, simple wiring.

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