Cynosure Cynergy, Техническое руководство

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28 of 112 850-1265-000, Rev. 4 Cynosure, Inc.
IGBT/Simmer Module
WARNING: Use extreme caution while working in the high voltage subsystem. High
voltage may be present at any time! Electrical shock or burns can occur. Limit access to
factory-trained personnel.
The Insulated Gate Bipolar Transistor (IGBT)/Simmer module is shown in Figure 6 . Four
IGBTs are used in the Cynergy laser. A single IGBT is used to energize the YAG laser. Two
IGBTs, driven in parallel, are used to energize the PDL. A fourth, smaller IGBT, is used to
provide pulsed simmering for the PDL. The driver for the YAG IGBT is found on the
IGBT/simmer PCB. As its name suggests it provides two functions: simmering and IBGT
driving. The two IGBTs for the dye laser are driven by the triple IGBT driver PCB. Mounted on
it is the small IGBT for the pulsed simmer, while it is mounted on the dual IGBT for energizing
the dye laser. Simmering capability for the dye lamps and snubbing for the IGBTs that energize
the dye laser are provided by the snubber /simmer PCB, which is mounted to the upper tier of the
dual IGBT.
Figure 6–IGBT/Simmer Module
One of the unique features of the Cynergy laser is that both the YAG laser and the PDL use the
energy stored in the capacitor bank PCB. Each driver board has its own isolated power supply,
mounted to each PCB, ensuring that each IGBT is isolated from primary side AC power and
power coming from the LVPS. This will be discussed further in the section on Laser Control.
Important functions of the YAG/IGBT driver board are to control, monitor and report operation
of the IGBT using fiber-optic input and output. For example if is an optical pulse of 5msec is
received by the IGBT driver board from the laser control board, the driver board will generate an
electrical gate pulse for 5msec. This activates the IGBT device for 5msec. Optical transmitters
pass on fault status to the laser control board.