인버터의원리
description
Transcript of 인버터의원리
-
( INVERTER ) ? 1. (1)
, . , 1957 Thyristor (SCR) , 1960 . Solid State Devices , 1 . , . , , , COMPUTER , . .
(2)
( PROCESS CONTROL ), . , ( BLOWER ) BLOWER , 3 .
(3) 1) DC MOTOR MOTOR AC MOTOR . . , , , . .
2) FAN, BLOWER DAMPER V.S MOTOR , SHORT .
-
TRIP . . , . . , . ( 67 ) . PLC . FAN, PUMP, BLOWER . CRANE, HOIST CONVEYER SOFT-START / SOFT-STOP . .
(4)
f P S N .
120f N = ------ * ( 1 - S )
P
1) ( P )
-
2) ( S ) .
3) ( f )
, ( P ) rpm (S) .
, . . , .
-
, . , VVVF( Variable Voltage Variable Frequency ) .
2. (1)
1) DC LINK L , . - .
2) SYSTEM
CONTROLLED RECTIFIER , . DC-LINK
DC-LINK .
CONTROLLED RECTIFIER . -
3)
-
- -
4)
(REGENERATION) . TURN-OFF PHASE CONTROL SCR . - . ( 6 66Hz ). : : ( COMMUTATION FAILURE ) .
5) .
4 . , THYRISTOR . PULL-OUT . . . . . .
FEEDBACK( CLOSED ) . . ( LOAD COMMUTATED INVERTER ) SPIKE , . SKIN EFFECT
-
(2) 1)
. LC . PAM , , PWM DC .
2) SYSTEM
SCR 3 DIODE MODULE . DC-LINK
DC-LINK CB( ) .
PWM .
3)
- ( ) - PWM
4)
1, 2 , 4 DUAL CONVERTER . PEAK .
-
PWM . TURN-OFF IGBT, FET TRANSISTOR . .
5) .
( COMMUTATION ) . 1 : 10 . . . , .
. REGENERATION DUAL CONVERTER . . . dv/dt PROTECTION .
3.
(1)
-
3 Diode Module( DM ) EMI Surge Absorber( ZNR ) .
(2) DC LINK
DC Filtering() ( CB ), OFF ( RB ) VDC Film ( C ), ON PM( IPM, TR. ) ( RS ) RLY( 84a ) . , SHORT POWER DC REACTOR .
(3)
TRANSISTOR, IGBT PWM DC , TURN-ON OFF 2 SNUBBER .
4. (1) PAM(Pulse Amplitude Modulation)
1)
-
2) PAM AC DC DIODE MODULE SCR MODULE , . , .
PAM
(2) PWM(Pulse Width Modulation) 1)
-
2)
PWM DIODE MODULE AC DC , CHOPPING , . , , 1/2 .
-
< PULSE >
< PULSE >
3) PWM
-
fR : ( ) fc : ( )
fC fR , .
(3) PWM & PAM PWM
(PM) (DM)
PAM
1 PWM PWM 2 3 4 5 6 95% 90% 7 80 94% 90% 8 9
10
11 NOISE .
.
. .
-
. NOISE . .
5.
(1) (2) Thermal (3) (4) TORQUE BOOST (5) JUMP (6) . LIMIT (7) (8) 2 (9) 2 (10) FREE-RUN-STOP (11) (12) (13) (14) DATA (15) (16) (17) : ( UP ), ( DOWN ) (18) GAIN. BIAS (19) (20) (21) (22) AUTO-TUNING (23) .
6.
(1) (2)
-
(3) (4) (5) (6) (7) (8) (9) (10) (11) EEPRON, CPU & CT ERROR (12) (13) (14) (15)