BOC Edwards CV-6SL, Инструкция по эксплуатации

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+ 15V DC Regulated U-12
- 15V DC Regulated U-14
+ 10V DC Regulated U-13
+ 5V DC Regulated U-1
8. mA Feedback Output: An output signal is provided on P1 that is used as a ground referenced
power supply current feedback signal to P2 pins 2, 3 on the Gun Card: C-6-1899-98.
0-600 MA power supply current equals
0-6V DC output on P1 pins 2, 3.
4.6 High Voltage Power Card C-6-1895-49
The input thre-phase line voltage connects directly to P-1, P-2 and P-3 located on the power card.
Contactor K-1, when energized, charges the rail capacitors as part of a two step turn on function.
Resistors R-42 and R-43 limit the current during the initial charge. Transistors Q-7 and Q-8 turn on
after completion of the charge and send a signal across a voltage barrier that the charge is complete and
the circuit is ready for the main contactor K-2 to close. Note, the output of U-1 turns on Q-10 that in
turn energizes relays K-2. All voltage for the turn on circuit comes from the 24 volts through the
interlock chain.
High voltage turn ON is confirmed with the 24V return on Pin 15 of P-6.
There are two IGBT's inverter switches mounted between the heat sink and circuit card. The inverter
functions as high speed switches and connects the primary of the high voltage transformer between the
center point of the rail capacitors and the rails. Thus, the transformer sees 1/2 the rail voltage. The
inverter switch between the (+)rail and the (-)rail at a frequency of 22KHz.
Each IGBT has a gate drive circuit located on the Gate Driver Board C-6-1884-69. A coupling
transformer located on the board provides voltage isolation between the gates. The gate board output
jacks plug directly into their respective IGBT Gate Terminals located in clearance slots below the
inverter board.
4.7 Gun Supply C-6-1899-98
The gun supply circuit board contains two regulated power supplies plus functions as the interface with
the gun control. The circuit board has two interface jacks and an optical receiver that provide
connections to the outside circuits. P-1 connects to the Gun Control located in a separate chassis. J-1
is an 18 Pin, Phoenix connector located in the chassis base. All power enters and exits through J-1.
1. Filament Regulator: The single phase 220 volt power for the filament and positions circuits
enters on Pin 5 and 7. The circuit is protected by fuses F-1 and F-2. The A.C.
power is rectified by CR-5 and filtered by inductors L-2 and L-3 in combination with rail
capacitors C-1 and C-2. It should be noted, both the filament power supply inverter
and position supply inverter utilize the same D.C. rail capacitors. The filament inverts Q-1
and Q-2 switch, the primary of the filament transformer, between the rails at a frequency of
approximately 40KHz. It should be noted, the filament transformer connects to the center
point of the rail capacitors, thus, half of the rail voltage is impressed alternately on the
transformer by the FET inverters. Transistors Q-3 and Q-4, in conjunction with transformer T-
2, provide the gate drive for the FETS. Inductor L-1 has a dual function of adding impedance
in the primary and a sensing circuit for fault currents. C-3 are tuning capacitors for the output
circuit.
The filament current feedback circuit utilizes transformer T-4 to measure the filament
transformer primary current. The signal is rectified by CR-13 and calibrated by R-29. The