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Power transistors control system (driver)
Controlling the PWM circuit driver is carried out via the VC5 transoptor, which controls the V
transistor. The V
transistor directly controls the complementary circuit made on V
29
transistors which control the chopper transistor gates. The driver is supplied by positive voltage
obtained from the rectifier on diodes V
full-wave rectifier on diodes V
made on R
, V
, V
, VC
32
23
24
transistors.
Power unit
Positive and negative voltages are used for supplying electronic circuits; voltages are obtained from
two full-wave rectifiers made on the VB2 bridge.
The positive voltage power unit is composed of a filter comprising C
filtered on these capacitors is carried to the input of the A19 voltage stabiliser with the output voltage
of +15V, supplying most of the electronic circuits on the board. Voltage behind the V
is used for supplying the amplifier of the voltage signal sent by the shunt made on the A1 integrated
circuit.
The negative voltage power unit is composed of the C
stabiliser.
Output voltage of -15V coming from this stabiliser is used for supplying most of the operational
amplifiers with negative voltage. Voltage behind the V
amplifier
of
the
voltage
and V
as well as by a negative voltage obtained from the
36
37
and V
.Circuit signalling the readiness of the driver supply voltage is
38
39
and V
elements. The driver makes it possible to control MOS and IGBT
4
25
signal
sent
103
capacitor and the A20 negative voltage
105
diode (-14.5V) is used for supplying the
21
by
the
shunt
made
20
29
, V
and V
30
31
33
and C
capacitors. Voltage
104
diode (+14.5V)
20
on
the
A1
circuit.
,
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