Delta Electronics MVF2000 Series, Product Manual

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3
I.General
1-1 Product characteristics
The Delta MVF2000 medium voltage drive is a high voltage alternating current speed
regulating device developed and produced by Delta Electronics. The product features
comprise of excellent performance, easy and convenient operation and a wide range of
applications using IGBT power devices and complete digital control.
1. High efficiency and low distortion

By using multi-pulse input rectification transformer technology, which efficiently lowers
the content of the power side distortion current to less than 5%. It meets the IEEE
519-1992 standard and the strict requirements of electric grids for distortion, and
enhances the power factor to more than 0.96 lagging;

By using cell cascaded multilevel technology without the need of an output filter and with
an output voltage waveform similar to sine wave output; the dv/dt is small, which is
applicable to long cable motor installations without any damage to the cable and motor
insulation;

System efficiency >98.5% (at rated frequency, excluding transformer)
2. Tolerant to power disturbances and wide applicable scope

When the input voltage is as low as 70%, the system can still continuously conduct
derated operation;

With automatic output voltage adjusting function, when the input voltage fluctuates from
90% to 110%, the output voltage can still be kept steady, thus realizing safe and steady
operation of the motor.
3. High reliability

SOA design ensures that the system operates in a wide safe range: (1) sufficient design
margin makes sure that each device operates in the middle area of the safe operating
area; (2) optimized thermal design ensures temperature margin for the devices; (3) the
dc-link capacitors are designed for long lifetime service.

Redundant auxiliary control power.

The system provides a self-diagnosis function to show the position and type of failure and
warn the user about the fault occurrence.

Automatic detection and warning function for cooling fan failure or excessive dust in the
inlet air filter notifying the user to conduct maintenance.

The strict
Delta’s quality assurance program, production quality management, control
flow process, and perfect test equipment and methods ensure the effective
implementation of each test item for devices, components and units during the
manufacturing process.
4. Site flexibility

The compact structure and high power density of MVF2000 can reduce the requirements
for site space.