Hyundai N5000 Instruction Manual page 22

Multi-level inverter

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N5000 INSTRUCTION MANUAL

composed of CPU board, digital/analog I/O boards and optical converter board. Operator using

touch-keypad is installed at the front panel and has SMPS (Switched-mode power supply) for DC5V,

±15V, 24V output to operate main control part and operator etc.

Figure 3-12 Organization of N500 Inverter master control

*CPU board

CPU board controls the system by exchanging signals with the I/O board. Also, it calculates the

inverter output value for controlling loaded motor speed and transfers the value to each power cell

controller through CAN communication. Power cell controller implements control for PWM in

accordance with the received control values from main control part and generate gate pulses for

IGBT to make adequate voltage and phase values for an induction motor. Operational information

of each power cell inverter is delivered to the main control part through CAN communication, and

the main control part makes inverter system perform a corresponding work. Figure 3-13 shows the

inside composition of CPU board. Main process elements are highspeed digital signal processor and

core part that is composed of integrated logic gate elements, EEPROM, SRAM and NVRAM.

Communication part is composed of CAN communication controlling device, RS235, serial

communication control device of RS485 and local bus for system expansion.

*I/O board

I/O board is consisted of digital I/O and analog I/O board. And a circuit for 16 digital input and 8

C C C C hapter3. Specification and Operation

hapter3. Specification and Operation

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