Product Technology
Space Vector Modulation(
SVM
) Digital Signal Processing (
)
Space Vector Modulation is the next generation of Pulse
Width Modulation ( Implementation of
SVM uses an advanced signal handlingtechnique called Digital Signal Processing (
PWM )
inverter control technology.
SVM DSP ).
DSP ’s highsampling rates allow the
industrial inverter to switch more e uses an advanced switching technique for PWM driving
Insulated Gate
Bipolar transistors ( ffi cientlyand react much faster to severe load changes.
IGBT ). The objective of
DSP alsoincreasessystem reliability by replacing multiple analog
controller components.
SVM is to generate the output voltage vector using simplerswitching pattern combinations. Traditional
PWM uses athree dimensional pattern,
SVM simplifies the switching to two dimensions.
Superior Battery Management (
SBM
)
SVM
Advantages
The battery system of a
UPS must be periodically maintainedand monitored to ensure it is fully operational when needed.
Every >Higher E ffi ciency
GEUPS incorporates a standard feature called SuperiorBattery Management ( Reduces switching losses and improves partial load e ffi ciency
SBM ) that can be configured to peri-odically test the battery system and calculate true battery
runtime using measured values for temperature and load. >Improved Output Performance This means that any shutdown or “stop operation” willbe initiated based on measured values and not time. Reduces Total Harmonic Distortion (
THD ) with non-linearloads and improves transient response to step loads >Precise Paralleled System Performance More accurate load sharing with multiple units
operating in parallel
SBM Advantages
>Works With all Battery Types
Pulse Width Modulation(
PWM
)
>Online Battery Test Software compensates for battery types such as vented,
sealed or even NiCad In traditional PWM, the triangle wave is compared to reference
sinewave. The result is a pulse width modulated rectangular
waveform, which is used to provide gate signals to the IGBTs. >Increases Battery Life The risk of utility power loss to the load during battery
tests is prevented by an energized rectifier Heavy-duty rectifier/charger delivers “managed charge”
current to the battery system
PWM : IGBT Interaction with Triangle Wave Zig Zag Transformer 1/4 Cycle AC SinewaveTriangle Wave
IGBT Gate Signal This specially designed output Zig Zag transformer enables the UPS to run with heavily unbalanced loads and supplies full k VA outputcapacity at PWM signals have to be calculated in real time and normallyrequires 3 dimensional calculations (one for each three phase leg) to
determine the inverter state. By using SVM, the calculationis sim-plified to a 2 dimensional “space vector” in a polar coordinate plane.As the calculations are simplified, less computing timeis required,
speeding up the response and improving system performance. 100 % non-linear load.The secondary windings of the output transformer form a Zig Zagpattern from neutral cancelling triplen load harmonics. This reducesneutral conductor loading and losses in all the conductors and
the input transformer. 2