Keysight E3633A, Руководство пользователя

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Tutorial 7
Keysight E3633A and E3634A User’s Guide 193
Extending the Voltage and Current Range
The power supply may be able to provide voltages and currents greater than its
rated maximum outputs if the power-line voltage is at or above its nominal value.
Operation can be extended up to 3% over the rated output without damage to the
power supply, but performance cannot be guaranteed to meet specifications in
this region. If the power-line voltage is maintained in the upper end of the input
voltage range, the power supply will probably operate within its specifications.
The power supply is more likely to stay within specifications if only one of the
voltage or current outputs is exceeded.
Series connections
Series operation of two or more power supplies can be accomplished up to the
output isolation rating of any one supply to obtain a higher voltage than that
available from a single supply. Series connected power supplies can be operated
with one load across both power supplies or with a separate load for each power
supply. The power supply has a reverse polarity diode connected across the
output terminals so that if operated in series with other power supplies, damage
will not occur if the load is short-circuited or if one power supply is turned on
separately from its series partners. When series connection is used, the output
voltage is the sum of the voltages of the individual power supplies. The current is
the current of any one power supply. Each of the individual power supplies must
be adjusted in order to obtain the total output voltage.
Parallel connections
Two or more power supplies being capable of CV/CC automatic cross over
operation can be connected in parallel to obtain a total output current greater
than that available from one power supply. The total output current is the sum of
the output currents of the individual power supplies. The output of each power
supply can be set separately. The output voltage controls of one power supply
should be set to the desired output voltage; the other power supply should be set
for a slightly higher output voltage. The supply with the higher output voltage
setting will deliver its constant current output, and drop its output voltage until it
equals the output of the other supply, and the other supply will remain in constant
voltage operation and only deliver that fraction of its rated output current which is
necessary to fulfill the total load demand.