Wide range of option units for AT24 VFD UB line!

Could the low-voltage VFD be alone in a control cabinet? It is possible in a simple application, but mostly, drive automation systems require auxiliary equipment and we can supply the full package.

Triol Corporation offers a wide range of input and output filters for UB line variable frequency drives.?

VFDs inherently produce high-frequency electrical noise. The induced interference spans frequencies ranging from 150 kHz to 30 MHz, with spurious electromagnetic radiation extending from 30 MHz to 1 GHz. To mitigate Radio Frequency Interference (RFI) emissions and ensure electromagnetic compatibility with noise-sensitive devices, an EMC filter is employed.

The three-phase electromagnetic radiation filter is engineered to suppress interference within the 150 kHz to 30 MHz range, following the principles of a "Faraday cage." This? Filter is needed to reduce the influence of VFD on other mechanisms or electronics.

DC chokes play an important role in mitigating harmonic distortion generated by the input current of VFDs. They offer protection against current surges in the DC link when there are voltage fluctuations in the mains. Additionally, DC chokes help reduce rectified voltage and current ripples at the output of the rectifier, while also limiting the magnitude and rapidity of short-circuit current escalation.

Incorporating DC chokes substantially enhances the service life and reliability of VFD operations.

The line choke serves to mitigate the impact of VFDs on the power supply network by suppressing higher harmonics of current, including those at frequencies of 250 Hz, 350 Hz, 550 Hz, and beyond. Additionally, it provides protection for the inverter against power surges and phase imbalances, thereby extending its service life.

Sine-wave filters are engineered to exclusively permit low frequencies, such as the mains frequency while filtering out higher frequencies. This filtering results in sinusoidal line voltage and current outputs. Utilizing sinusoidal signals eliminates the necessity for specialized motors with reinforced insulation to operate from the inverter, consequently reducing acoustic noise from the motor.

Moreover, sine-wave filters alleviate the strain on motor insulation and bearing currents, contributing to the extension of both its service life and maintenance intervals. Additionally, they enable longer cable runs from the inverter to the motor, offering greater flexibility in installation setups.

The braking unit enables the AT24 VFD to function in generator mode or reduce the stopping time of inertial mechanisms. In instances where the voltage in the VFD's DC link exceeds safe levels, the brake switch unit activates braking resistors. These resistors dissipate excess energy, preventing emergency stops and ensuring smooth operation.

For VFDs with power ratings up to 15 kW, the brake switch is integrated within the VFD unit. However, for VFDs ranging from 18 to 320 kW, external brake units are installed to manage braking functions effectively.

Braking resistors serve the crucial role of dissipating excess energy during intensive braking of high-inertia mechanisms. They prevent emergency stops of variable frequency drives by absorbing surplus energy and managing high voltage in the DC link effectively.

In conclusion, the AT24 VFD UB line offers a comprehensive range of option units to enhance its performance and versatility in various applications. Triol Corporation provides a complete package of input and output filters, including EMC filters, DC chokes, AC chokes, sine-wave filters, braking units, and braking resistors.

These option units address critical aspects of VFD operation, such as mitigating electrical noise, suppressing harmonics, protecting against voltage fluctuations, and improving motor performance and longevity. By incorporating these units, users can ensure electromagnetic compatibility, reduce interference, enhance system reliability, and prolong equipment service life.

Whether it's mitigating harmonic distortion, managing braking operations, or maintaining system integrity, the wide range of option units available for the AT24 VFD UB line caters to diverse industrial needs, providing flexibility, efficiency, and reliability in drive automation applications.

More info can be foung in the catalo, available by the link: https://www.dhirubhai.net/feed/update/urn:li:activity:7163962674387509248