PJ1000C/1300C/2000LCD
ELETTRONICA
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User Manual
Rev. 1.0 - 28/02/11
7.2 PJ1000/1300C-LCD Different Parts
7.2.1 Power Supply
The
PJ1000C/1300C-LCD
power supply section is made up of a surge protection
module and two power supply units:
1. Over range protection. Surge Protection board protects machine from eventual
unexpected variations of the mains voltage.
2. Service. This section contains elements that do not regard directly the power
supply, they are:
- Service transformer
- Power switch
- Service voltage selector
- Service fuse
3. Power Supply. Various units supplies an adapted supply to RF power amplifier
modules. The units that compose power supply are rectifiers (PFC or traditionals)
and switching supply. Machine is available in different configuration for voltage
rectify:
- One PFC
(solo 230 V)
- Two PFC
(115-230 V)
7.2.1.1 PFC Unit
PFC units are rectifiers that modulates absorbed current so that the wave shape
is sinusoide, having so 99% power factor.
PFC can work with input mains voltage from 90 V to 250 V. When you use it with
mains voltage of 110 V, is necessary to install two PFC units because there is a
lot of absorbed current. In PFC output there are 350 V of rectified voltage.
7.2.1.2 Power supply
There are two power supply switching mode of 50 V 25 A, that have an input
voltage check. Output voltage is set from microprocessor in function of RF power
required.
Two power supply units works in parallel mode and they have a balance current
circuit so that the distributed current from every module is approximately the same
one.
