Electrical Energy Conversion and Power Systems Universidad de Oviedo Energy storing and recovering in power systems and HEV and EV Third Semester Lecturer: Juan Díaz BUSBAR
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Electrical Energy Conversion and Power Systems
Universidadde Oviedo
Energy storing and recovering in power systems and HEV and EV
Third SemesterLecturer: Juan DíazBUSBAR
2
Wiring and Packaging
TANQUERESONANTE
INTERRUPTOR
DEBIDAS AL CABLEADO
DEBIDAS AL CABLEADO
Parasitic Inductances will appear ALWAYS.
The switches also have inherent inductors
What are the effects ?
3
This is our equivalent circuit We open the circuit
Overvoltage EMI Switching losses Wires dissipating can heat the switches
Wiring and Packaging
Leq
Vce
It is possible to use resistors (snubbers)
4
Wiring and Packaging
Stopped 2001/06/15 01:28:55 2us/div
(2us/div)
200ns/div
NORM:100MS/s
CH1=20V DC 10:1
CH1=20V
CH2=50V DC 10:1
CH2=50V
CH3=10mV DC 1:1
CH3=10mV
CH4=50V DC 100:1
CH4=50V
T -130ns 1/ T 7.69231MHz
=Filter=Smoothing : OFFBW : FULL
=Offset=CH1 : 0.0VCH2 : 0.0VCH3 : 0.0000VCH4 : 0.0V
=Record Length=Main : 2KZoom : 200
=Trigger=Mode : NORMALType : EDGE CH1 Delay : 1.5nsHoldoff : MINIMUM
5
Wiring and Packaging
SCREWS MATERIAL!!SCREWS MATERIAL!!
We add capacitors, decoupling the power supply
- Capacitors also add an inductor. - If we want short distances, we can not add a lot of capacitors.- They have to be as close to the switch as possible.
6
Wiring and Packaging
7
Wiring and Packaging
But, How we send the energy to the IGBTS? We need wires
Conductor
Dielectric
We are going to use capacitors!!
As conductors copper, silvered copper, gold-copper etc. and as dielectric materials, high isolation capabilities, high permitivity in a reduced thickness (Kapton, NOMEX, AMRON).
8
Not only in power electronicsNot only in power electronics
Wiring and Packaging
9
Wiring and Packaging
Even the driver needs to minimise the lenght connections
10
Keep in mind:
-Bus bar capacitor value depends on dielectric and dimensions (It is a capacitor).
-SKIN effect has to be considered
-Always we are going to introduce an inductor
-The dielectric has to whisthand the voltaje applied
l
1/2 L+ 1/2 R 1/2 L+ 1/2 R
G CFuente
primaria Carga
Wiring and Packaging
ELDRE:
11
02/05/10
12:40:11
40A/D
(200MS/s)
Stopped
1 :200MS/s20
0ns
Y+
296.88E+00
Y 600.00
VY ***.
***CH2
Freq
X+
26657.245
s0.07GHz
X 26658.490
sCH1
High
CH2
High
X 1.245
s12.802E+00
90.62
V 1/
X 0.803MHz
z1
<<Z1:400>>
CH1
CH2
CH3
MATH1
Wiring and Packaging
12
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