IGBT Technology: Tried and True
Over the years, IGBT technology has proven to be the most
reliable and best performing means of speed control in low
voltage drives. Toshiba has mastered this technology, and
continues to excel at it. The T300MVi is designed using
both diodes and IGBTs in the main power circuit. We offer a
control circuit topology providing higher performance than our
competition while using fewer parts. What does this mean to
our customers? Plain and simple -- fewer parts equals lower
maintenance. This philosophy is integrated into our modular
vertical design to provide power module interchangeability and
smaller footprints than offered by competitors.
Other Advantages of IGBT Technology:
•
Inherent Short Circuit and Ground-Fault Immunity at Output
•
Lower Gating Power Requirements
•
Small Snubber Circuitry Required
Multi-Level PWM Output Closely
Simulates True Sinewave
The T300MVi drive employs several layers of switching
devices to provide a smooth output wave to the motor.
The multi-step output closely simulates sine wave shape ,
virtually eliminating motor failures due to insulation stress and
long lead-length issues.
The T300MVi drive’s topology allows retrofitting to existing
medium voltage motors without upgrading motor insulation.
It also:
•
Eliminates Need for an Output Transformer,
Reducing Cost and Size
•
Allows Use of Standard Bearings Without Grounding
or Isolation Means
•
Operates Motor at Design Rating (Maximum)
•
Enables Easy Retrofit
All T300MVi drives
use a three-power
module design for
reduced MTTR.
The special racking
mechanism extends
from the drive
to allow module
inspection.
In addition, the
drive does not
contain fans,
contactors,
or large electrolytic
capacitors.
Toshiba guarantees the
T300MVi product line will meet or
exceed IEEE-519 standards at input
to the drive. As a result, the drive
appears to be a linear load to the
power system.
The T300MVi design eliminates the
need for costly and time-consuming
harmonic analysis.
Output Voltage
Output Current
INTEGRAL
TRANSFORMER
OIL FILLED CAPACITOR
DIODE
RECTIFIER
IGBT CELL X3
