Voltage Regulator

Voltage Regulator For Fluorescent Lamp  3x36W

(Constant Input Voltage)

Select Tap 208 V For Load Voltage

                     Primary                                Secondary

lamp	P	V	I	P.F.	P	V	I	P.F.	Losses
0	0	220	0	0	0	207.3	0	0	11.4
1	45.75	220	0.4525	0.46	35.7	208	0.397	0.44	9.78
2	79.25	220	0.8762	0.45	67.1	207.6	0.765	0.42	8.54
3	110	220	0.83	0.46	98.9	207.3	0.812	0.59	6.2

At Full Load Condition:

n =    89.09  %    

Losses =  12.1  W

S₁ =   187  VA  

S₂  = 168.32 VA

Voltage Regulation =  0.12%

Select tap 217 V for Load Voltage

                     Primary                                Secondary

lamp	P	V	I	P.F.	P	V	I	P.F.	Losses
0	11.5	230	0.126	0.46	0	217.3	0	0	11.4
1	46.7	230.3	0.243	0.66	35.7	218	0.341	0.64	12.67
2	83.2	230.5	0.579	0.57	67.1	217.4	0.65	0.62	10.23
3	121.7	230.2	0.985	0.52	98.9	217.3	0.812	0.69	8.9

ŋ = 94.1 %

Losses = 6.01 W

S1 = 215.51 VA S2= 193.6 VA

Voltage Regulation = 0.5 %

Step-Up Autotransformer (Constant Input Voltage)

 

                     Primary                                Secondary

lamp	P	V	I	P.F.	P	V	I	P.F.	Losses
0	10.075	110	0.172	0.52	0	220.6	0.001	0	10.075
1	105.5	110	0.987	0.98	94.5	214.5	0.443	1	11
2	192	110	1.792	0.99	178.8	210.3	0.856	1	13.2
3	228.75	110	2.115	0.99	212.7	209.5	1.016	1	16.05

At Full Load Condition:

n   =    92.98  %    

Losses =  16.05  W

S₁ =   232.65  VA  

S₂  = 212.852  VA

Voltage Regulation =  5.29%

Step-Down Autotransformer

 

 

                     Primary                                Secondary

lamp	P	V	I	P.F.	P	V	I	P.F.	Losses
0	0	220	0	0	0	110.1	0	0	0
1	42.3	220	0.21	0.92	34.2	109.1	0.307	1	8.4
2	74.6	220	0.357	0.96	65.3	108.5	0.578	1	10.32
3	107.72	220	0.51	0.98	97.3	108.1	0.826	1	11.63
4	104.67	220	0.65	0.99	127.6	107.3	1.025	1	12.95
5	171.9	220	0.81	0.99	156.4	107.1	1.573	1	14.3
6	201,6	220	0.93	0.99	185.2	106.2	1.655	1	16.67
7	232.3	220	1.07	0.99	220.1	105.7	2.201	1	17.9

ŋ =  93.23% Losses = 16.62W

S1 = 236.5VA S2   = 216.68VA

Voltage Regulation = 7.23%

Voltage Tapping (Constant Input Voltage)

Designed Voltage	Measure Value	Error	Winding (turn)	Designed (V/N)	Calculate (V/N)
110	109.7	0.27	340	0.3239	0.3215
107	106.8	0.18	265	0.3239	0.3224
101	100.8	0.19	302	0.3239	0.3216
98	97.8	0.20	312	0.3239	0.3237
86	85.9	0.11	330	0.3239	0.3236

Load test (Constant Input Voltage)

 

                       Primary                               Secondary

Lamp	P	V	I	P.F.	P	V	I	P.F.	Losses
0	9.243	110	0.1624	0.51	0	110	0	-	9.243
1	43.56	110	0.4536	0.94	34.32	109	0.310	1	9.243
2	76.94	110	0.7861	0.97	63.53	105	0.595	1	13.412
3	94.29	110	0.8240	0.99	79.42	104.6	0.773	1	14.871
4	110.70	110	0.9763	0.99	95.68	104.3	0.939	1	15.023

At Full Load Condition:
h =    86.431%    
Losses =   15.323 W

S₁ =   107.393  VA  
S₂  =  97.937 VA       
Voltage Regulation =  5.46%

Approximated Equivalent Circuit

Zsc = Vsc/Isc = 6.25/1=6.25 Ω

X²p = Z²sc-R²p = 6.25²-5.825²
Xp = j2.265Ω

Rc=Vo/Io(cosѳ)=110/(0.19x0.43)=1346.38Ω

Xm=Vo/Iosinѳ=110/(0.19x0.866)=j668.53Ω

	P	V	A	PF	Note
Open Circuit Test	7.8	110	0.19	0.43	O/C Secondary Side
Short Circuit Test	5.3	6.2	1.17	0.98	S/C Secondary Side