BÁO CÁO NGHIÊN CỨU VỀ BỘ CHUYỂN ĐỔI MA TRẬN TẦN SỐ CAO (High Frequency Matrix Converter)

BÁO CÁO NGHIÊN CỨU VỀ BỘ CHUYỂN ĐỔI MA TRẬN TẦN SỐ CAO (High Frequency Matrix Converter) bao gồm các nội dung chính: 1. Background information. 2. Proposed converter. 3. Results todate. 4. Conclusion.

BACKGROUND INFORMATION

induces a current in a conductor (work-piece)

tanks

the work-head and the

quality factor

INDUCTION HEATING – BASIC PRINCIPLES

current density is about 1/3 of its surface value

INDUCTION HEATING – BASIC PRINCIPLES

INDUCTION HEATING – RESONANT TANKS

Series resonant tank

high frequency

Parallel resonant tank

INDUCTION HEATING – RESONANT TANKS

high frequency, can

be used with VSIs

circulate through C

CONVENTIONAL CONVERTERS – CSI

CONVENTIONAL CONVERTERS – CSI

and physical cable length

distortion

CONVENTIONAL CONVERTERS – CSI

or phase angle (phase-shift) modulation

CONVENTIONAL CONVERTERS – VSI

R

0 1 2 3 4 5 6 7 8 9 10 S1

S2 S3 S4

0 1 2 3 4 5 6 7 8 9 10 -30

-20 -10 0 10 20 30

above resonance operating condition

CONVENTIONAL CONVERTERS – VSI

CONVENTIONAL CONVERTERS – VSI

variants, with or without lossless snubbers

CONVENTIONAL CONVERTERS – VSI

S2 S3 S4

0 1 2 3 4 5 6 7 8 9 10 -30

-20 -10 0 10 20 30

0 1 2 3 4 5 6 7 8 9 10 S1

S2 S3 S4

-30 -20 -10 0 10 20 30

Current Voltage

15

CONVENTIONAL CONVERTERS – VSI

or ZCS, stray capacitances can be utilised

power factor

CONVENTIONAL CONVERTERS – VSI

converter

CONVENTIONAL CONVERTERS – VSI

SINGLE PHASE MC – TOPOLOGY

commutation

SINGLE PHASE MC – PROBLEMS

switching pattern of single-phase version may

create large distortion in input currents

preferrable

THREE PHASE MC – PROBLEMS

RESULTS – LITERATURE SURVEY

H-bridge Inverter

Tank

RESULTS – REFERENCE SYSTEM

H-bridge Inverter Gate Drive

RESULTS – REFERENCE SYSTEM

FPGA Board

H-Bridge Inverter

Series Inductor Tank Capacitor

RESULTS – REFERENCE SYSTEM

-15 -10 -5 0 5 10 15

RESULTS – REFERENCE SYSTEM

Power angle (deg.)

182 kHz

160 kHz

Input current vs frequency Input current vs power angle

RESULTS – REFERENCE SYSTEM

Power angle (deg.)

182 kHz

170 kHz

Output current vs frequency Output current vs power angle

0 2 4 6 8 10 12 14 16 18 20 -15

-10 -5 0 5 10 15

-20 0 20 40

RESULTS – SIMULATION OF SINGLE PHASE MC

RESULTS – SIMULATION OF SINGLE PHASE MC

0 5 10 15 20 25 30 35 40 45 50 -40

-30 -20 -10 0 10 20 30 40