Topic:
A High-Efficient Power
Converter for
Thermoelectric Energy
Harvesting
Presentator : Lê Văn Sỹ _20119156
Chu Đức Tiến_20119167
Trần Nguyễn Anh Khoa_20119188
Nguyễn Thành Duy Thanh_20119157
Nguyễn Quang Vinh_20119178
Insutructor : TS.Phạm Văn Khoa
Outline
1.
Overview
2.
Energy Harvesting system
3.
Simulation and result
4.
Conclusion
5.
Future plan
1.
Overview
Energy harvesting systems
for wearable applications
Thermocouple structure
System overview of a thermoelectric energy
2. Energy
Harvesting
system
• The schematic of the
proposed thermoelectric
energy harvesting system
3. Simulation and result
• The schematic of low pass
filter
Output signal of low pass filter
Power dynamic of low pass filter
Low pass filter
Power static of low pass filter
P(dynamic) (uW)
26.34
P(static) (nW)
394.9
P(Total)(mW)
26.34
The schematic of
Voltage divider
Output signal of Voltage divider
Power Dynamic
The schematic of opamp
Output signal of op-amp
Power dynamic
Power static
Op-amp
P(dynamic) (uW)
32.29
P(static) (pW)
16.12
P(Total)(mW)
32.29
The schematic of Voltage sensor of MPPT
Output signal of Voltage sensor of MPPT
Power dynamic
Power static
Voltage sensor
P(dynamic) (uW)
315.2
P(static) (uW)
255.4
P(Total)(uW)
570.6
The schematic of DFF
Output signal of DFF
Counter up down 4 bit synchronous
Output signal of counter up-down 4 bit
Tapped-delay
Block diagram of the segmcntcd DPWM intcgrated circuit prototype
• The schematic of DPWM
Output signal of DPWM
DPWM
P(dynamic) (uW)
25.72
P(static) (uW)
2.11
P(Total)(uW)
27.83
Power dynamic of dpwm
Rising Edge Detector - Current Sensor Block
Dynamic power
Static power
Total power
P=0.8796 𝜇𝑊
The schematic of the one shot generator
• Output signal of one shot
generator
Power dynamic
Power static
1 shot generator
P(dynamic) (uW)
44.47
P(static) (pW)
108
P(Total)(uW)
44.47
• The schematic of Clock generator
• Output signal of clock generator
Power dynamic
Power static
clock generator
P(dynamic) (uW)
818.2
P(static) (W)
2.438x10−39
P(Total)(uW)
818.2
MPPT and ZCS controller
Power dynamic MPPT and ZCS controller
Power static MPPT and ZCS controller
MPPT and ZCS
P(dynamic) (mW)
22.21
P(static) (pW)
355
P(Total)(mW)
22.21
The schematic of the proposed thermoelectric energy harvesting system
Vin(mV)
90
Vout(V)
1.99
Output voltage of the energy harvesting system
Power dynamic of total
Power static of total
Energy Harvesting system
P(dynamic) (uW)
34.14
P(static) (uW)
24.2
P(Total)(uW)
58.34
=> P(effi).%=P(out)/P(in)=22.61 (MPPT)
P(out) non MPPT
P(in) non MPPT
=> P(effi).%=P(out)/P(in)=6.27 (non MPPT)
Specification
(VTEG=90mV)
Power Efficient(%)
Non-MPPT
6.27
MPPT
22.61
4. Conclusion
• From the simulation results,
when using 180nm technology
the proposed boost dc-dc
power converter can handle a
wide range of temperature
fluctuations. Power efficiency is
maintained at 22% when the
resulting input voltage is as low
as 90mV.
5. Future plan
Performance improvement plan:
1.
Using another method can
improve performance as well as
output voltage on the 180nm
chip
2.
Use other delay techniques to
reduce Cadence's memory loss