Processor Card A002; Power Supply; Microcontroller; Fpga (Field Programmable Gate Array) - Kemppi FASTMIG X 450 Service Manual

7. PROCESSOR CARD A002

Processor card A002 controls the power source with 32-bit microcontroller with the help of FPGA (Field Programma-
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ble Gate Array)

7.1. Power supply

Gate driver card A001 15V is used to make processor card auxiliary voltages. 15V is brought to processor card thru
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connector X3
Two step-down regulators (N1 and N5) regulate 5.3V and 1.2V voltages from the 15V. Three linear regulators (N17,
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N18 and N19) is used to regulate 5V, 3.3V and 2,5V from 5,3V

7.2. Microcontroller

FastMig X power source is controlled by 32-bit microcontroller
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Microcontroller has integrated CAN (Control Area Network) module which makes possible to implement CAN bus be-
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tween other controllers
The Microcontroller (N11) controls the secondary voltage and gives reference current value to the FPGA based on the
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measured secondary current and voltage. Current and voltage measurements are controlled by FPGA
Microcontroller also controls fans, power on LED, over temperature LED, DC-link overvoltage protection, A001 card
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15V under voltage protection and cooling liquid unit based on measured information.
Microcontroller gets real time clock information from RTC-component D7 (Real Time Clock). When power source is
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off, battery G1 keeps the RTC-component running. Battery type is 3Volt CR2032 Li:MnO
5 years
Microcontroller configures FGPA and loads the configuration data to the FPGA every power source start-up
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FastMig X secondary current and voltage measurements are calibrated by software
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7.3. FPGA (field programmable gate array)

FPGA is used to implement peak current-mode control to directly control (peak) primary current. FPGA adjusts prima-
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ry peak current so that secondary current is same as reference current given by microcontroller
FPGA is configured every time when the power source starts up
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Kemppi OY
SERVICE MANUAL
FASTMIG X
and estimated battery life is
2
14 (37)