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AN3338 Datasheet(PDF) 14 Page - STMicroelectronics

Part # AN3338
Description  In recent years the variable speed motor control market has required high performance
PDF  72 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3338 Datasheet(HTML) 14 Page - STMicroelectronics

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Inverter design concept and SLLIMM solution
AN3338
14/72
Doc ID 18441 Rev 4
The SLLIMM specifications are described below by using the STGIPL14K60 datasheet as
an example. Please refer to the respective product datasheets for a detailed description of
other types.
Equation 1
•
VPN: supply voltage applied between P-NU, NV, NW
•
VPN(surge): supply voltage (surge) applied between P-NU, NV, NW
•
VCES: collector emitter voltage
The power stage of SLLIMM is based on IGBTs (and freewheeling diodes) having 600 V
VCES rating. Considering the SLLIMM internal stray inductances during the commutations,
which can generate up to 100 V of surge voltage, the maximum surge voltage between P-N
(VPN(surge)) allowed is 500 V. At the same time, the maximum supply voltage (in steady-
state) applied between P-N (VPN) allowed is 450 V because of an additional 50 V of surge
voltage generated by the stray inductance between the SLLIMM and the DC-link capacitor.
Figure 8 shows the parasitic inductances of the output stage. It is possible to note that there
are two major components, the first is due to the internal layout of SLLIMM, while the
second is due to the layout of the board.
Table 2. Inverter part of STGIPL14K60
Symbol
Parameter
Value
Unit
VPN
Supply voltage applied between P-NU, NV, NW
450
V
VPN(surge)
Supply voltage (surge) applied between P-NU, NV, NW
500
V
VCES
Collector emitter voltage (VIN
(1)=0)
600
V
±IC
(2)
Each IGBT continuous collector current at TC=25 °C
15
A
±IC
(3)
Each IGBT pulsed collector current
30
A
PTOT
Each IGBT total dissipation at TC=25 °C
44
W
tSCW
Short-circuit withstand time, VCE=0.5· V(BR)CES, Tj=125 °C,
VCC=Vboot=15 V, VIN
(1)=0÷5 V
5µs
1.
Applied between HINU, HINV, HINW; LINU, LINV, LINW and GND.
2.
Calculated according to the iterative Equation 1.
3.
Pulse width limited by max. junction temperature.
))
T
(
I
T
(@
V
R
T
T
)
T
(
I
C
C
max,
j
)(max)
sat
(
CE
)
c
j
(
th
C
max
j
C
C
⋅
−
=
−



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