ABB drives MEGADRIVE-LCI 2 to 150 MW

ABB drives  MEGADRIVE-LCI  2 to 150 MW

The MEGADRIVE-LCI medium voltage drive

Large synchronous motor variable

speed control

The top performer for 40 years

improves your industrial

operations by using variable

speed control and soft starting

of your large synchronous

machines.

The MEGADRIVE-LCI medium voltage

drives are engineered drives specifically

suitable for high power applications such

large pumps, fans and compressors.

Industry-specific functions and unique

features ensure reliable performance of

your processes and systems, even in

demanding environmental conditions.

Well-proven and reliable

The well-proven technology offered in the

MEGADRIVE-LCI controls your high power

applications and provides soft starting of

large synchronous motors, reducing the

impact on your network and machinery.

The larger the process and the higher

the performance demands, the greater

your benefits from electronic speed control.

The energy savings will offset your costs

of the drive system in a short time and

reduced maintenance needs will help you

to save additional money and time.

Thanks to many years of successful

performance, the MEGADRIVE-LCI is

renowned for its high availability and

reliability. The drive’s simple design and

proven components enable trouble-free

use and maximized uptime of your

processes.

Get a drive solution that gives you peace

of mind by ensuring efficient operation

you can count on day after day, and year

after year.

Get a drive solution that meets the requirements of your application and

ensures high productivity and the optimum performance of your operations.

Benefit from the built-in expertise of our medium voltage drives and take

your business forward with everything working like clockwork.

Reliable and simple design

The MEGADRIVE-LCI uses well-proven

components, which are specifically designed

for high power and high voltage applications.

Thyristors

Thyristor power semiconductors are

developed for high powers, highest reliability

and low losses. They have low on-state and

switching losses, which results in a converter

efficiency of 99 percent, including the DC reactor.

Its redundant power components allow reliability

and availability to be further increased.

Rectifier

The rectifier is line commutated and forms

a fully controllable DC current source in

conjunction with the reactor in the DC link.

6-, 12- or 24-pulse rectifier configurations are

available for minimized harmonic influence

of the converter on the supply system.

The MEGADRIVE-LCI meets the most stringent

requirements for current and voltage harmonic

distortion as defined by IEEE, IEC and EN.

Excitation converter

The excitation of the synchronous motor

can be of the brushless or slip ring type.

The excitation converter provides the motor

field current in the entire speed range and

at standstill.

Inverter

Thyristors in the inverter electronically

switch the DC current to produce a 3-phase

AC system of variable frequency and voltage

for supplying the motor. The motor voltages

commutate the inverter phase currents. At very

low speeds (0 – 10 percent of rated speed), when

the motor voltage is too low to guarantee

reliable commutation, an artificial commutation

is used. 6- or 12-pulse inverter configurations

are available to minimize motor torque ripple.

Supply voltage dip ride-through

The MEGADRIVE-LCI has the ability to ride

through short main and auxiliary supply voltage

interruptions so that in most cases the process

is not affected.

Encoderless control

Speed and rotor position encoders at the motor

shaft are sensitive instruments in a harsh process

environment and known to be susceptible to

failures. ABB’s MEGADRIVE-LCI operates without

encoders, thereby ensuring a high level of

availability and reducing maintenance costs.

User-friendly control terminal

An LCD touch screen provides the operator

with a range of selectable displays showing

information on the current status of the system

in graphical and numerical form.