AN1524 Freescale Semiconductor / Motorola, AN1524 Datasheet - Page 9

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

powered up. Check all connections twice. First turn on the +5
and +18 volt supplies. Then check all the gate drive signals
with an oscilloscope. Once you are confident the micro and
gate drives are functioning properly, proceed to power up the
AC line. Set the inverter output frequency to about 15 Hz. Set
the load torque to zero or disconnect the motor load. First turn
down the variac all the way. Then energize the isolation
transformer. Monitor the DC link voltage. Slowly increase
variac output voltage. The motor should start turning before
the DC buss reaches 100 volts. Once the motor is turning, it
should be safe to turn up the variac to full voltage.
and assembly of an AC drive. A demo board has been
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MOTOROLA
Use the following procedure the first time the system is
The Integrated Power Stage greatly simplifies the design
L1
L2
L3
MAINS INPUT
208 / 240 3
380 / 480 3
BREAKER
BOX
OR
SUMMARY
ISOLATION / STEP–UP
TRANSFORMER
380 / 480 V 3
208 / 240 3
Freescale Semiconductor, Inc.
OR
For More Information On This Product,
Figure 12. Isolated Three Phase AC Supply
Go to: www.freescale.com
VARIAC
480 V 3
developed for the integrated power stage module. The demo
board has been tested and is fully operational. This board may
be used to evaluate module performance and facilitate rapid
product development.
1. Using the MC68332 Microcontroller for AC Motor
2. M68MCD16Y1 Motion Control Development Board
3. Multi–Channel PWM TPU Function, TPUPN05/D
Control, J. Baum and K. Berringer, Motorola Application
Note AN1310
Users Manual, M68MCD16Y1/D
REFERENCES
DISCONNECT
SWITCH BOX
MAINS OUTPUT
0–480 VAC 3
ISOLATED
5 WIRE
AN1524
L1
L2
L3
N
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