Theory Of Operation; Configure Current Share; Setup Current Sharing Network - Xantrex GPIB-M-HPD Operating Manual

Current Sharing
Overview
Theory of
Power supplies may be connected in parallel to supply a large current to a load.
Typically, because of differences in the load connections, each power supply may
Operation
provide different amounts of current to the load.
When multiple power supplies are configured for current sharing, the master supply
will make minute changes to the slave's voltage and current to equalize the current
draw from each. The slaves will track the master's voltage, current, output and output
on/off setting. Protection limits are controlled and monitored on the master unit.
Configure The current sharing modes available are:
Current
•
Share
•
•
Select whether the unit will operate as a master or slave unit:
SOURce:COMBine:CSHare:MODE [MASTer|SLAVe|OFF]
To query the total output current of all current sharing units, use the SCPI command:
MEAS:CURR? SUM
The current share subregister (CSHare) will show whether the master or slave is
operating.
STAT:OPER:CSH:COND?
See Table 4.9, "CURRent Sub-Register," on page 77 for a description of the bits in
this register.
Setup To set up multiple supplies for current share operation, follow these steps:
Current
1. Configure each supply with a unique multichannel address. (See
Sharing
Network
2. Power down the units. Connect the CAN ports of all paralleled units as you
3. Make load connections. It is recommended to keep load cables the same length
4. Power up the master, then all slaves.
5. Set the voltage on the master, then enable the output.
90
No sharing
Master: sets up the unit as the master controller.
Slave: sets up the unit as the controlled slave.
Multichannel Operation" on page
Configure one supply to operate as the master. Configure others to operate as
slaves.
would for multichannel operation
if possible. See Figure
35.)
5.1.
Operating Manual for Multichannel Functionality (GPIB-M)
"Configure for