Tag Archives: VFD

Liquied Cooled Drives

The compact and robust liquid-cooled cabinet drives are an utlimate solution for various applications where space savings, silent operation or durability in harsh environments is a must.

Through built-in redandancy of parallel connected modules, enables higher drive availability and greater process uptime. If one of the moduels is not operating or is being maintained , the drive will continue to operate at partial load.

Advanced liquid cooling and optimal design

Direct liquid cooling offers easy heat transfer without air filtering problems. As the coolant takes care of 98% of the heat losses , no additional filtered air cooling is needed. This increase the total efficiency of the drive installation.

For harsh enviromental conditions

The totally enclosed cabinet structure makes the liquid-cooled drives perfect for harsh environmental conditions, like marine and offshore requirements, and the drives have marine type approvals from various classification bodies.

As the direct liquid cooling enables silent operation , makes them suitable for applications where noise levels are an important environmental factor.

Robust , reliable and compact

Highly efficient liquid cooling removes the need for air conditioning in installation rooms, bringing installation and operating costs down. As there is no need for additional air-conditioning devices or air ducts, the installation is significantly simplified.

The used coolant type is Antifrogen® L. A cooling liquid with glycol and inhibitor. It is a ready-made, commercially available mix, which enables easy commissioning and maximized process uptime.

Highlights:

  • Advanced liquid cooling which reduces the need for air cooling in installation rooms.
  • High power density with compact design.
  • Redundancy possibility through parallel connected modules prevents unwanted process interruptions.
  • Low harmonic and regenerative variants.
  • Silent operation
  • Suitable for harsh environments
  • Marine approvals from various key classification bodies.

Regenerative Variable Speed Drives

Regenerative drives are a solution for regenerative operation in cyclic or continuous braking applications. such applications include cranes, elevators ,centrifuges, downhill conveyers and test benches.

With regenerative functionality , the braking energy of the motor is returned to the drive and distributed to the supply network so that it can be utilized by other equipment. compared to mechanical or resistor braking, where braking energy is wasted as heat , regenerative drive operation offers significant energy consumption and cooling savings.

Possibility to regenerate 100% of power continuously

benefits:

Minimized downtime

The VFD will not interrupt the process or affect its quality in unstable supply network conditions. The drive’s active supply unit can boost the output voltage to enable full motor voltage, even when the supply voltage is below nominal value. This ensures reliable operation in weak networks. This voltage boost capability can also be utilized to overcome voltage drops caused by long supply or motor cables.

Optimized cost and space

Everything needed for regenerative operation, such as an active supply unit and a low harmonic line filter are integrated into the drive, and no external braking devices are needed.

Advantages:

  • Quick, easy drive installation
  • Small installation footprint
  • No need to add cooling to handle the heat generated by mechanical or resistor braking
  • simplified wiring
  • Fewer spare parts needed

The drive’s voltage boost capability can be an advantage in motor dimensioning. With a higher motor voltage, the same power is achieved with less current, which improves motor efficiency and may allow a smaller motor to be used.

The drives also can offer a possibility of network power factor correction to compensate for the low power factors of equipment connected to the same network. It reduces the need for additional power factor correction equipment such as filters and large capacitor banks.

Maximize motor performance and efficiency

The drive can provide full motor voltage, even if the supply voltage fluctuates. Regeneration can occur for as long as necessary and as often as needed.

The drive features direct torque control (DTC) provides precise speed and torque control for maximum motor performance and motor efficiency.