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參數(shù)資料
| 型號： | PW-83075P6-900 |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | UNIVERSAL MOTOR CONTROLLER, 200 A, XMA |
| 文件頁數(shù)： | 3/24頁 |
| 文件大?。?/td> | 578K |
| 代理商： | PW-83075P6-900 |
11
Data Device Corporation
www.ddc-web.com
PW-8X075P6
C-05/02-250
10%
90%
td (off)
10%
90%
5%
V
BUS
O
I
d (on)
t
r
f
t
UPPER / LOWER
on
Ps-
t on
off
Ps-
FIGURE 7. OUTPUT CHARACTERISTICS
FIGURE 6. POWER DISSIPATION CIRCUIT
POWER DISSIPATION
There are three major contributors to power dissipation in the
motor driver: conduction losses, switching losses, and flyback
diode losses. Consider the following operating conditions:
VBUS = +270V
fPWM = 10kHz
duty cycle = 50% (ton = 50s; toff = 50s)
IO = 40A, Module Output Current
during ton, Ic = IO; during toff, If = IO
The power dissipation of the circuit shown in FIGURE 6 can now
be calculated using information from the data sheet as follows:
Transistor data
TJ MAX = 150 °C (TABLE 2)
θJC.IGBT = 0.55°C/W (TABLE 2)
VCE(SAT) = 1.56V
(FIGURE 9a, 2.2V x 0.71 = 1.56, tj = 150°C, Ic = 40A)
EON (50A, 270V) = 0.675 mJ (TABLE 2)
EOFF (50A, 270V) = 4.5 mJ (TABLE 2)
Flyback diode data
TVJ MAX = 150 °C
θJC.diode = 0.87°C/W (TABLE 2)
VF(avg) = 1.23V (FIGURE 9c, Tvj = 150°C, If = 40A)
1. Transistor Conduction Losses (PC)
PC = Ic x VCE(SAT) x duty cycle
PC = 40A x 1.56V x 50%
PC = 40A x 1.56V x 0.5
PC = 31.2W
2. Transistor Switching Losses (PS)
Ps = [E-ON (scaled) + E-OFF (scaled)] x fPWM
EON (scaled) = EON (50A, 270V) x (VBUS / 270V) x (IO/50A)]
E-ON (scaled) = [0.675mJ x (270V / 270V) x (40A / 50A)]
E-ON (scaled) = 0.54 mJ
E-OFF(scaled) = [EOFF (50A, 270V) x (VBUS/270V) x (IO/50A)]
E-OFF(scaled) = [4.5 mJ x (270V/270V) x (40A/50A)]
E-OFF(scaled) = 3.6 mJ
PS = (0.54 mJ + 3.6 mJ) x 10kHz
PS = 41.4W
3. Flyback diode Losses (Pd)
Pd = IO x VF(avg) x [1 - duty cycle]
Pd = 40A x 1.23V x [1 - 50%]
Pd = 40A x 1.23V x [1 - 0.5]
Pd = 40A x 1.23V x 0.5
Pd = 24.6W
4. Transistor Power Dissipation (PT)
PT = PC + PS
PT = 31.2W + 41.4W
PT = 72.6W
5. Maximum Allowed Module Case Temperature
TCASE.ALLOWED.IGBT = Tjmax -
θjc.IGBT x PT
TCASE.ALLOWED.IGBT = 150°C - [(0.55°C/W) x (72.6W)]
TCASE.ALLOWED.IGBT = 110°C
TCASE.ALLOWED.diode = Tvjmax -
θjc.diode x Pd
TCASE.ALLOWED.diode = 150°C - [(0.87°C/W) x (24.6W)]
TCASE.ALLOWED.diode = 129°C
Maximum allowed case temperature for the module will be the
lesser of the allowed diode and allowed IGBT case tempera-
tures:
TCASE.ALLOWED
= smaller of TCASE.ALLOWED.diode or TCASE.ALLOWED.IGBT
PW-8x075P6
VBUS+
VBUS-
OUTPUT
MOTOR
φA
φB
φC
Io
ton
1/fPWM
Ic
If
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