B.4.3 Applications - Delta Electronics AC Motor Drive VFD-E User Manual

Appendix B Accessories|

B.4.3 Applications

Connected in input circuit
When more than one AC motor drive is
connected to the same mains power, and one
of them is ON during operation.
Correct wiring
Silicon rectifier and AC motor drive are
connected to the same power.
Correct wiring
power
B-12
Application 1
reactor
M1
M2
Mn
Application 2
reactor
reactor
Question
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.
AC motor drive
AC motor drive
AC motor drive
Question
Switching spikes will be generated when the
silicon rectifier switches on/off. These spikes
may damage the mains circuit.
Silicon Controlled Rectifier
AC motor drive
Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11
motor
motor
motor
DC
motor