Control of 3-phase synchronous
generator
Using a 3-phase induction motor to rotate the generator shaft
Parameters
Generator: Sn=300 VA; fn=50 Hz; Vn=380 V; Y-connection; In 0.55 A;
N=3000 rpm; Iex=If  0.4 A; Vex=Vf=190 V;
Load: resistors (3 resistors; Y-connection) with 7 levels; IL  0.55 A;
Induction motor: 300W; 220/380 V; 2/1.1 A; 2650 rpm; -connection
Inverter Mitsubishi D700-SC:
Input: V1p=220V; 50Hz; Output: 3*240V; f=0-60 Hz;
(Ex. 3: regulating frequency with the adjuster (vol); fmax=60 Hz)
Generator: Sn=300 VA; fn=50 Hz; Vn=380 V; Y-connection; In
0.55 A;
N=3000 rpm; Iex=If  0.4 A; Vex=Vf=190 V;
Load: resistors (3 resistors; Y-connection) with 7 levels; IL  0.55
A;
Principle diagram
Induction motor: 300W; 220/380 V; 2/1.1 A; 2650 rpm; connection
Synchronous
machine I <=0.55 A
Inverter Mitsubishi D700-SC:
Input: V1p=220V; 50Hz; Output: 3*220V; f=0-60 Hz;
Y-connection
(Ex. 3: regulating frequency with the adjuster (vol); fmax=60 Hz)
I <=2 A
L1
V1p=220 VAC
N
Inverter
Mitsubishi
D700-SC
U
V
V1
W
W1
220V
(FR-D720S-025SC-EC)
Ex:3; fmax=60 Hz
Shaft
U1
L1
V1
L2
W1
L3
(coupling)
AC 3-phase
analyzer
NG
-connection
V
I <=0.4 A +E
NG
L1
L2
L3
3-resistor
Load
Max=300 W
NL
Y-connection
A
Monitoring output
current and frequency
I <=2 A
7-level
380V
n ~ 3000
rpm
U1
I <=0.55 A
-E
Neutral
DC voltage ~ 150V;
(insert a low-pass filer)
Field
Neutral
Report sample (link: bit.ly/3EOD1Tm)
Let define the steps of control and operation
Results and discussion