B-9
Note:
AC motor Drive Spec.
No built-in DC reactor
Reactors in series
specifications
3% input reactor
5% input reactor
THD 44%
35%
Warning
1. THD may have some slight differences because of the different installation
conditions (e.g.: cables, motors).
2. Use the output AC reactor can protect the motor and extend the cable usage of
length.
3. The specification of output and input reactors are the same, Delta’s part
number is unavailable now, please refer to the table above for purchasing.
Applications
Connected in input circuit
Application 1
Question
When more than one AC motor drive is
connected to the same mains power and one
of them is ON during operation.
When applying power to one of the AC motor
drive, the charge current of the capacitors
may cause voltage dip. The AC motor drive
may be damaged when over current occurs
during operation.
Correct wiring
M1
M2
Mn
reactor
AC motor drive
AC motor drive
AC motor drive
motor
motor
motor
Application 2
Question
Silicon rectifier and AC motor drive are
connected to the same power.
Switching spikes will be generated when the
silicon rectifier switches on/off. These spikes
may damage the mains circuit.
Correct wiring
DC
power
reactor
reactor
AC motor drive
motor
Silicon Controlled Rectifier
