AN1524 Freescale Semiconductor / Motorola, AN1524 Datasheet - Page 4

• Manufacturer Part Number: AN1524
• Description: AC Motor Drive Using Integrated Power Stage
• Manufacturer: Freescale Semiconductor / Motorola

Gate Drive
level shifting. The circuit is shown in Figure 5. The HCPL0453
optocoupler (U8) was chosen for its high dv/dt capability and
speed of operation. The 480 VAC drives must operate with DC
link voltages as high as 850 volts under regeneration
AN1524
(FROM PLD)
The gate drives for the high side IGBTs use optocouplers for
4
UT
U1
180
D5
R43
P1
N1
1
+18 V
25
R
1.0
1.0
R1
R2
Freescale Semiconductor, Inc.
2 3 4 5
D4
S
HCPL0453
R
For More Information On This Product,
24
U8
T
2.2
R46
S
Figure 5. High Side Gate Drive
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N2
23
Figure 4. Power Electronics
6
INTEGRATED POWER STAGE
+V M
P2
C19
0.1 F
7
T
22
DB1
+V M
R47
5.6 k
8 9
C1
0.033 F
DB2
B
conditions. Thus, a 600 volt HVIC solution is not suitable for
480 VAC drives. It is estimated that high voltage drives
account for more than 1/3 of 1 hp drives and about
three–fourths of the 5 hp drives. Optocouplers provide a
universal solution for both voltage ranges.
21
C18
10 F
10 11
+
C2
470 F
U
20
12 13
U11
MC33151D
+
V
C3
470 F
19
14 15 16 17
U
D10
W
18
V
100
R52
J1
22
W
R53
240
240
HEATSINK
480
MOTOROLA
G1
(U1 PIN 9)
E1
(U1 PIN 8)