Received 12-06-2019 Revised 13-08-2019 Accepted 13-08-2019
Full bridge switching power supply for a thermoelectric dehumidifier
Jensak EkburanawatDepartment of Electrical Engineering, Faculty of Engineering, Rajamangala University of Technology Rattanakosin, Nakhon Pathom
Corresponding author.Tel 08 9697 4340, E-mail [email protected]
1 4
PIC16F
5 lagging
Abstract
This research proposes an invention of the switching power supply designed for a thermoelectric dehumidifier This switching power supply consists of many important part which are a soft-start circuit, rectifier, boost converter, full-bridge inverter, high frequency transformer and the output rectifier circuits The switching power supply can produce two voltage levels;
12 and 24 volts The microcontroller PIC16F886 integrated in the main control unit manages the operation of the boost converter circuit and full-bridge inverter circuit by generating the driving signal to the IGBT switch in both circuits for better output-voltage stability This switching power
supply can provide power rating of 94.85 watts in total and have 83.20 % efficiency with a power factor high as 0.95 lagging.
Keywords: Switching power supply, Thermoelectric, Dehumidifier
1.
Comfort zone)
ASHVE ( American society of heating &
ventilating engineers
- Dry bulb
temperature -29 [1]
24–27
50-70 0.2-1.0
1
[2]
74 72 73 76 79 80 Dew point) (Dew point temperature)
(RH) (T)
Magnus parameters
[3 –45
(1) 1.3
- -
CFCs
2.
2.1 5
2
94 x 305 x 94 2
TEC1-
12710 4
(Heat
pipe) -
4
4
1 2.2
-
- ( T)
87 mm.
25 mm.
Cold side
300 mm.
Hot side
51 mm.
80 mm.
Heat pipe & Fan
Heat pipe & Fan
Side View
Inlet air outlet air
TE Module
- , 36
2 Voltage
(V)
Temp.
( C)
Time (min)
Current (A)
14.11 32 3.65
36 13.33 39 5.25
48 13.98 38 6.58
-
2
3 2.3.1
-
Full-Bridge Converter Rectifier
Circuit Boost Converter
TE Modules
MCU IC
Opto IC
Gate Drive 230 VAC
Switching Power Supply Dehumidifier
Soft Start Circuit
Digital Thermometer
&
RH meter
Cooling Fan +
+ +
+
+ -
- -
-
- 12 VDC
24 VDC
220 VAC
F1 SPDT13.1 mH
1.57 uF S20K250
SCK105
SCK105 SCK105
IGBT1 600 uH
MUR860 220 uF
S1
S3
MUR820
MUR820 MUR820
5,500 uF
2,200 uF TE Module S2
S4 Cooling Fan
& Meter
220 -
(Soft start)
-
IGBT1
Low pass
filter
(2)
fC
L C
3 1 57
2,
Boost convertor)
[4]
(3)
Vin Vout
D Duty cycle)
-
RGTH00TS65GC11 650 50
(Full bridge Inverter
S1,
S4 S , S3
High frequency transformer [5,6
1 2
EE42
380 24 12
25
(4)
(5)
(6)
7
(7) AC
Bm
D N1
N2
n
Rectifier
MUR820 (Fast recovery diode 200 , 8
4
4
60 PIC16F886
5
5
6
PIC16F886 TLP 250
S1, S2
S3, S4
IR2110 IR2110
IR HIN LIN
IR 7
7
8 S1 S3
IR
61 9
YOKOGAWA 200 MHz 2.5 GS
Power quality analyzer Fluke
10-17 18
Vin
Iin
10
V
I
11
V
I
12
V I
13 1
62
Vsec1
Isec1
14 1
15 2
Vout1
Iout1
16
Vout2
Iout2
17
18
ISEC
83.20
0.95 lagging
lagging
19
4.
x 6.80 x
-20 20-
12
15 )
425
20
5.
6.
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0 10 20 30 40 50 60 70 80 90
0 10 20 30 40 50 60 70 80 90
1 2 3 4 5 6 7 8 9 10 11 12
Time (hour)
% RH Ambient Temp.
64
- selection. com/ comfort- zone- air- conditioner-sizing.html.
[2]
1 http www.tmd.go.th/info.
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Meteorol. 1990 -
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