Electrical Energy Conversion and Power Systems

Universidadde Oviedo

Energy storing and recovering in power systems and HEV and EV

Third SemesterLecturer: Juan DíazBUSBAR

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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 ?

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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)

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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

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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.

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Wiring and Packaging

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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).

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Not only in power electronicsNot only in power electronics

Wiring and Packaging

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Wiring and Packaging

Even the driver needs to minimise the lenght connections

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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

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