Telwin TECHNOLOGY 150 User Manual

-3-
ANALYSIS OF THE BLOCK DIAGRAM
NOTE: Unless indicated otherwise, it should be assumed that
thecomponentsareassembledonthewelding machine.
Consistingof:C3, R5, L1, C8, C9 .
Prevents noise from the machine from being transmitted along
themainpowerlineandviceversa.
Consistingof:Q1, Q2, Q3, Q4
Converts the continuous voltage from the filter into a high
frequency square wave capable of piloting the power
transformer.
Regulates the power according to the required welding
current/voltage.
Consistingof:T1 .
The C.T.isusedto measure the current circulating in the power
transformer primary and transmit the information to block 14
(primary current reader and limiter).
Consistingof:T1.
Adjusts the voltage and current to values required for the
welding procedure. Also forms galvanic separation of the
primary from the secondary (welding circuit from the power
supplyline).
Block 1
Block 2
Block 5
Block 6
Block 7
Block 8
EMC Filter
Chopper
Current transformer
Power transformer
(primary board)
Consistingof:D3, D5 (primary board).
Converts the alternating mains voltage to continuous pulsed
voltage NoD3presentonTechnology150).
Consistingof:K1, K2, R1 (primary board).
Prevents the formation of high transient currents that could
damage the main switch, the rectifier bridge and the
electrolytic capacitors.When the power source is switched on
relays K1 and K2 are de-energised, capacitors C2, C4, C5, C6,
C7 are therefore charged via R1. When the capacitors are
charged the relay will be energised. ( No K2 present on
Technology150).
Consistingof:C2, C4, C5, C6, C7 (primary board).
Converts the pulsed voltage arriving from the rectifier bridge
to continuous voltage ( No C7 present on Technology
150).
(primary board).
(primary board)
Consistingof:D1, D2, D3, D5(secondaryboard).
- D1 and D2 convert the current circulating in the transformer
to a single direction, preventing saturation of the nucleus.
:No D2 onTechnology 150).
Rectifier bridge
Pre-charge
Filter
Secondary diodes
(N.B.
N.B.
N.B.
(N.B.
Block 3
Block 4
- D3, D5 recirculate the inductance output current (block 9)
during the time when the IGBT's are not conducting,
bypassingthepowertransformer (block7).
Consistingof:L1, R1.
The inductance levels the output current from the secondary
board diodes making it practically direct.The shunt detects the
current circulating in the secondary and sends a voltagesignal
toblock16(adder),whichwillprocessit.
Inductance and Shunt
hybrid board.
block 14 (duty
cyclemaker).
Block 9
Block 10
Block 11
Block 12
Block 13
Block 14
Block 15
Block 16
Secondary EMC Filter
Flyback power supply
IGBT Driver
Primary current reader and limiter
Duty cycle maker
Adder
Alarm Block
Consistingof: CY1, CY2.
Prevents noise from the power source from being transmitted
throughtheweldingcables and vice versa.
Consistingof:T2,U2(primary board).
Uses switching methods to transform and stabilise the voltage
obtained from block 4 (filter) and supplies auxiliary voltage to
powerblock12(driver)and the
Consistingof:U1A, U1D (primary board).
Takes the signal from block 11 (flyback power supply) and,
controlled by block 14 (duty cycle maker), makes the signal
suitableforpilotingblock6(chopper).
Consistingof: R15 (primary board).
Reads the signal from block6 (current transformer) and scales
it down so it can be processed and compared in
Consistingof:U2 (hybridboard).
Processes the information from block 15 (adder) and block 13
(primary current reader and limiter) and produces a square
wave with variable duty cycle limiting the primary current to a
maximumpre-setvalue under all circumstances.
Consistingof:U1A, U1D (hybridboard).
Gathers all the information from block 13 (primary current
reader and limiter), from block 16 (alarms) and from block 18
(current potentiometer), and produces a signal with a suitable
voltagefor processing byblock14(dutycyclemaker).
Consistingof:Q5, R11, R14, R17 (control board).
When an alarm is detected the power source output current is
drastically reduced by making direct adjustments to block 14
(duty cycle maker) and directly changing the reference signal
obtainedfromblock18(currentpotentiometer).
TECHNOLOGY 150-170-200-186CE/GE
TECHNOLOGY 150-170-200-186CE/GE

Telwin TECHNOLOGY 150 Specifications

General

Brand	Telwin
Model	TECHNOLOGY 150
Category	Welding System
Language	English