开关电源发展与压电材料应用展望

30
20
10
fR
0
60 40
20 0
-20
-40
-60
-80
-100
100
200
300
400
500
600
Frequency [kHz]
TRANSONER Piezoelectric Transformers
Piezoelectric vs. Magnetic
Features: Simple construction without windings No winding shorts during operation No magnetic field involve in the operation (reduced RF and EMI) Low profile High efficiency Non-flammable 98% Typical Efficiency No High Voltage “Corona Effect” Pure Sine Wave Output (Minor Distortion) Surface Temperature raising T 35K due to their excellent thermal dissipation behavior.
TRANSONER Piezoelectric Transformers
New Piezo-Trafo technologies
Power Delivery [W]
USA 2019 TRANSONER TECHNOLOGY (Face Inter. Corp)
220W
T6 100W
Material Improvements
Background on Piezoelectric Transformers (PTs)
Family Photos
1958
Rosen: First Patent on PTs
Berlincourt: Ballast for gaseous discharge lamp
70’s
(Vermitron Corp.)
PZT-Material under development – (1954) (low Q, high dielectric losses, low coupling coef.).
Driving Circuitry
Electronic circuit based on discrete components
Specifications
Typical High Voltage Transoner® Type-3 Devices
Power (max) Frequency (range) Current Output (max) Gain Isolation Voltage Efficiency (max) Thickness--mm Length--mm Width--mm
Manufacturing Process
High Sintering Materials Expensive No tape-casting techniques Limit on sizes Double Polarization Process no optimized
Mounting
Reliable housing techniques under development
TRANSONER Piezoelectric Transformers
Background on Piezoelectric Transformers
Types of ‘Rosen’-piezoelectric transformers
TRANSONER Piezoelectric Transformers
T3
T3-HV
Transoner
Input Voltage in 10V CCFL applicat.
1kV
5kV
10kV
Output
Voltage [Vp]
Step-up ratio 50-100
TRANSONER Piezoelectric Transformers
Input Part
P
Rosen vs. Transoner
T1
Modular Design
JAPAN (1985 -2000)
Improvements
50W
(NEC, Tokin, Murata, etc)
USA 1958 Rosen -type
P
P
wenku.baidu.com
5W
Dimensional Redesign
Output Layer
Insulation Layer
P
P
Input Layer
PTs for TV receivers – HV for cathode ray. 70s (Denji Onkyo Limited, Matsushita, Motorola, RCA Corp.)
80s
85s to present
PTs for triggering power switches gates with galvanic decoupling (Triacs, Tiristors, Mosfets, etc.) : Siemens, General Electric.
TRANSONER Piezoelectric Transformers
SUCCESFULLY IMPROVED SINCE 1985’s
Background on Piezoelectric Transformers
Material
What was wrong with “those” Piezo-trafos
k33 + k31 + k15 K15 3.k31
TRANSONER Piezoelectric Transformers
Rosen vs. Transoner
Rosen-type TRANSONER ADVANTAGES
Transonertype
Simple achievement of ISOLATION capabilities > 35 kV by adding a isolation layer
Non-Isolating
4-5 W 65 kHz to 92 kHz
.007 A 1:20 to 1:90
NA 98+% 2.92 - 4.06 21.59 - 29.97 7.82 - 8.38
TRANSONER Piezoelectric Transformers
Approach to the Operation Principle Operation Point: Maximum Efficiency
TRANSONER Piezoelectric Transformers
Background on Piezoelectric Transformers
How do they operate?. Resonance
/2 mode
Piezoelectric Body
P
P
INPUT
3/2 mode
Piezoelectric Body
INPUT
P
PP
LOAD
OUPUT
LOAD
OUPUT
Phase [Degrees]
Impedance [Ohms]
Input Impedance open circuit conditions
70
60
1st longitudinal mode
(fundamental)
50
fA
40
3rd longitudinal mode
Piezoelectric Body
P
P
LOAD
INPUT
OUPUT
Inverse
Effect Mechanical
Low
Vibration
Voltage
(Resonance)
Direct Effect
High Voltage
Flat and thin design No electromagnetic noise/ no coils High power-density and step-up ratio High efficiency Non-flammable
The stack concept allows a LARGER MECHANICAL COUPLING AREA and thus a higher power density
INPUT AND INPUT CAPACITANCES can be independently designed without having the same thickness. Larger step-up ratios
PTs for backlight CCFL in lap-top computers. (NEC, Murata, Matsushita, Taiheiyo, Tamura, Motorola, Tokin, etc.)
Current target
Increase Power Density: Smaller sizes
TRANSONER Piezoelectric Transformers
TRANSONER Piezoelectric Transformers
Transoner: Types and specifications
RL T1-Type Transoner
Large Power
Output Layer
P
Step-up and Step-down
Input Layer
P
Medium, low impedance
As a result SMALLER SIZES and more compact and efficient inverter can be developed
TRANSONER Piezoelectric Transformers
Transoner: Types and specifications
MiniT1 Transoner Mini-size (5mm2 x 1mm) Step-up Mediumimpedance loads 200-1k (PDA, CellPhones)
TRANSONER Piezoelectric Transformers
Transoner: Types and specifications Type T3: High Voltage Transoner
loads 200-1k
(Linear fluorescent)
RL Output Layer
P
Insulation Layer
P
Input Layer
T3-Type Transoner Medium-low Power (5-8W) Very high Step-up (200) Large impedance loads 50k -300k (CCFL)
Power
Limited POWER CAPABILITIES ( 5 W/cm3)
TRANSONER Piezoelectric Transformers
Background on Piezoelectric Transformers
High immunity to external EMI, low profile, compact
Output Part
CONSTRUCTION
P
P
P
COUPLING AREA
Output Layer
Insulation Layer
Input Layer
POLING DIRECTION
k33 + k31
STRESS DIRECTION
(LONGITUDINAL vs. RADIAL+SHEAR)
Patent Notice: Technology disclosed on this page covered by one or more issued or pending U.S. and International patents owned by face International Corporation, Norfolk, Virginia, USA.
ELECTRICAL ENERGY
Voltage, current
ELECTRICAL ENERGY
Voltage, current
T P Transducer
P
Actuator
P = Polarization direction
T = Stress direction
Figure of a simple two-layer Transoner