In "2007 Delta Industrial Automation New Product Presentation", the presenter of AC motor drive introduced VFD-EL (economical type) and VFD-VL (elevator drive).

VFD-EL is the multi-functional and micro AC motor drive for the new generation, featuring: power range of up to 5HP (wider than the current VFD-S), adopting the minimal design style applied to industrial design in Europe with solemn color and appearance. VFD-EL was just awarded “Good Design Certificate” by Industrial Bureau of Ministry of Economic Affairs, Taiwan. The highly efficient heat dissipation design allows the drive to be installed in parallel to save space in the power panel. The easy-to-maintain and removable cooling fans are handy for installation and allow longer life span of the drive. In terms of communication, VFD-EL adopts international Modbus communication protocol, offering all kinds of communication modules. The built-in EMI filter is specially designed for the European market to efficiently reduce the electromagnetic interferences and complies with EN61800-3 (IEC) standard. In brief, VFD-EL’s compact dimension saves space, and the DIN rail adaptor on the back panel makes it easy to be installed onto the rail without having to drill. The common DC bus enhances the braking capability and stabilizes the voltage. Highly accurate and fast current detection is able to achieve a complete protection, together with the PID intelligent control.

VFD-VL is the AC motor drive exclusively designed for elevators with the power range of 5.5 ~ 22kW and two control modes: induction motor and permanent magnet synchronous motor (PMSM). The slim-type modulized design makes it handy for the installation and maintenance in the elevator machine room and echoes the machine-room-less trend in the elevator market. Moreover, VFD-VL also features: built-in FOC, i.e. when the PMSM is enabled, it will automatically detect the position of magnetic pole and enable self-learning function. Other features include auto-correcting the starting torque and manual auto-tuning. VFD-VL is built-in with braking unit, elevator machine braking output contacts and elevator start/stop procedures and supports emergent DC48/96V power supply.

In general, Delta's AC motor drives can be applied in elevators, food packaging/shaping machine, machines used in electronics industry, environment testing equipment, freezer rooms, compressors, band saw machines, drilling machines, conveyers, wood processing machines, air-conditioning systems, constant-voltage water supply systems, treadmills, textile machines and so on. More about Delta's VFD series AC motor drives, please visit our website at:
http://www.delta.com.tw/product/em/em_main.asp