Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
SPACE VECTOR MODULATION FOR THREE-LEG VOLTAGE SOURCE INVERTERS
08-10-2012, 05:17 PM,
#1
SPACE VECTOR MODULATION FOR THREE-LEG VOLTAGE SOURCE INVERTERS

SPACE VECTOR MODULATION FOR THREE-LEG VOLTAGE SOURCE INVERTERS

[30929]


THREE-LEG VOLTAGE SOURCE INVERTER

The topology of a three-leg voltage source inverter is Because
of the constraint that the input lines must never be shorted and the output current must
always be continuous a voltage source inverter can assume only eight distinct topologies.
These topologies are shown on Fig. 2.2. Six out of these eight topologies produce a nonzero
output voltage and are known as non-zero switching states and the remaining two
topologies produce zero output voltage and are known as zero switching states.



SPACE VECTOR MODULATION

The desired three phase voltages at the output of the inverter could be represented
by an equivalent vector V rotating in the counter clock wise direction as shown in Fig.
2.6(a). The magnitude of this vector is related to the magnitude of the output voltage (Fig.
2.6(b)) and the time this vector takes to complete one revolution is the same as the
fundamental time period of the output voltage.



RIGHT ALIGNED SEQUENCE (SVM1)

A simple way to synthesize the output voltage vector is to turn-on all the bottom
(or top) switches at the beginning of switching cycle and then to turn them off
sequentially so that the zero vector is split between V7(ppp) and V8(nnn) equally. This
switching scheme is shown in Fig. 2.8 for two sampling periods. The signals in the figure
represent the gating signals to the upper legs of the inverter. The scheme has three switch
turn-on’s and three switch turn-off’s within a switching cycle. The performance of the left
aligned sequence, where the sequence of vectors is exactly opposite to the right aligned
sequence, is expected to be similar to the right aligned sequence.



Alternating Zero Vector Sequence (SVM3)
In this scheme, known as DI sequence in literature [6], the zero vectors V7(ppp)
and V8(nnn) are used alternatively in adjacent cycles so that the effective switching
frequency is halved
Reply
08-10-2012, 05:17 PM,
#2
SPACE VECTOR MODULATION FOR THREE-LEG VOLTAGE SOURCE INVERTERS
SPACE VECTOR MODULATION FOR THREE-LEG VOLTAGE SOURCE INVERTERS

[attachment=30929]


THREE-LEG VOLTAGE SOURCE INVERTER

The topology of a three-leg voltage source inverter is Because
of the constraint that the input lines must never be shorted and the output current must
always be continuous a voltage source inverter can assume only eight distinct topologies.
These topologies are shown on Fig. 2.2. Six out of these eight topologies produce a nonzero
output voltage and are known as non-zero switching states and the remaining two
topologies produce zero output voltage and are known as zero switching states.



SPACE VECTOR MODULATION

The desired three phase voltages at the output of the inverter could be represented
by an equivalent vector V rotating in the counter clock wise direction as shown in Fig.
2.6(a). The magnitude of this vector is related to the magnitude of the output voltage (Fig.
2.6(b)) and the time this vector takes to complete one revolution is the same as the
fundamental time period of the output voltage.



RIGHT ALIGNED SEQUENCE (SVM1)

A simple way to synthesize the output voltage vector is to turn-on all the bottom
(or top) switches at the beginning of switching cycle and then to turn them off
sequentially so that the zero vector is split between V7(ppp) and V8(nnn) equally. This
switching scheme is shown in Fig. 2.8 for two sampling periods. The signals in the figure
represent the gating signals to the upper legs of the inverter. The scheme has three switch
turn-on’s and three switch turn-off’s within a switching cycle. The performance of the left
aligned sequence, where the sequence of vectors is exactly opposite to the right aligned
sequence, is expected to be similar to the right aligned sequence.



Alternating Zero Vector Sequence (SVM3)
In this scheme, known as DI sequence in literature [6], the zero vectors V7(ppp)
and V8(nnn) are used alternatively in adjacent cycles so that the effective switching
frequency is halved
Reply
12-05-2012, 04:18 PM,
#3
RE: SPACE VECTOR MODULATION FOR THREE-LEG VOLTAGE SOURCE INVERTERS
to get information about the topic "vector modulation techn" full report ppt and related topic refer the link bellow


kguru.info/t-space-vector-modulation-control-algorithm-for-vsi-multi-level-converters

kguru.info/t-space-vector-modulation-for-two-leg-inverters

kguru.info/t-space-vector-modulation-for-three-leg-voltage-source-inverters

kguru.info/t-efficient-hybrid-carrier-based-space-vector-modulation-for-a-cascaded-multilevel-inve
Reply
12-05-2012, 04:18 PM,
#4
RE: SPACE VECTOR MODULATION FOR THREE-LEG VOLTAGE SOURCE INVERTERS
to get information about the topic "vector modulation techn" full report ppt and related topic refer the link bellow


seminarprojects.com/Thread-space-vector-modulation-control-algorithm-for-vsi-multi-level-converters

seminarprojects.net/t-space-vector-modulation-for-two-leg-inverters

seminarprojects.com/Thread-space-vector-modulation-for-three-leg-voltage-source-inverters

seminarprojects.net/t-efficient-hybrid-carrier-based-space-vector-modulation-for-a-cascaded-multilevel-inve
Reply

Marked Tags: space vector modulation for three leg voltage, 5b97eeb3, space vec, 4 leg inverter modulation, vector modulation techn, space vector modulation pdf, space vector, seminar topics on modulation, seminar topics for inverters, space vector modulation for voltage source inverters ppt, seminar on space vector modulation,

[-]
Quick Reply
Message
Type your reply to this message here.

Image Verification
Please enter the text within the image on the left in to the text box below. This process is used to prevent automated posts.

Possibly Related Threads...
Thread Author Replies Views Last Post
  Z-SOURCE INVERTER PPT study tips 2 352 03-07-2013, 06:49 PM
Last Post: study tips
  A Voltage Controller in Photo-Voltaic System without Battery Storage for Stand-Alone seminar tips 1 470 03-05-2013, 09:08 PM
Last Post: seminar tips
  High Voltage Direct Current (HVDC)Transmission Systems: An Overview. PPT study tips 1 407 03-01-2013, 07:33 PM
Last Post: study tips
  New type T-Source inverter Abstract study tips 1 326 03-01-2013, 03:35 PM
Last Post: study tips
  Four quasi-Z-source inverters Abstract study tips 1 210 03-01-2013, 03:34 PM
Last Post: study tips
  Constant boost control of the Z-source inverter to minimize current ripple and study tips 1 163 03-01-2013, 03:33 PM
Last Post: study tips
  Maximum boost control of the Z-source inverter Abstract study tips 1 208 03-01-2013, 03:32 PM
Last Post: study tips
  Z-source inverter Abstract study tips 1 221 03-01-2013, 03:32 PM
Last Post: study tips
  VOLTAGE FED TRANS - Z SOURCE INVERTER REPORT study tips 1 461 03-01-2013, 03:31 PM
Last Post: study tips
  Amplitude Modulation PPT study tips 1 247 02-25-2013, 07:27 PM
Last Post: study tips

Forum Jump:


Users browsing this thread: 1 Guest(s)