DC/AC Inverter
Simplified SPICE Behavioral Model
All Rights Reserved Copyright (C) Bee Technologies Corporation 2010
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Contents
1.
2.
3.
4.
5.
6.
Model Overview
Benefit of the Model
Concept of the Model
DC/AC Specification (Example)
Input-Output Characteristics
Simulation Circuit and Setting
All Rights Reserved Copyright (C) Bee Technologies Corporation 2010
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1.Model Overview
• This DC/AC Inverter Simplified SPICE Behavioral Model is for users
who require the model of a Inverter as a part of their system.
• The model focuses on the input/output relationships of the Inverter
block; therefore, it is not using high frequency models (e.g. oscillator
and noise models), and is not based on the electronic topologies of
the Inverter.
• The model enables long-term behavior simulation of the system
(e.g. in a Photovoltaic system simulation).
All Rights Reserved Copyright (C) Bee Technologies Corporation 2010
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2.Benefit of the Model
• Enable Transient Simulation.
• Can be adjusted to your own DC/AC specifications, by editing the
model parameters.
• The simplified model is an easy-to-use, which can be provided
without the circuit detail.
• Time and costs are saved because only the necessary parts are
simulated.
All Rights Reserved Copyright (C) Bee Technologies Corporation 2010
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3.Concept of the Model
IIN
I O~
IN+
OUT+
Single Output DC/AC Inverter
VIN,MIN~VIN,MAX Simplified SPICE Behavioral Model
(Vdc)
Efficiency (n) = PAC / PDC
= ( Vorms  Iorms ) / ( VIN IIN )
IN-
~
VO (VAC)
OUT-
The model is characterized by parameters n, Vin_min, Vin_max, Vo_ac andFreq that represent the input-output-relationships of the Inverter.
All Rights Reserved Copyright (C) Bee Technologies Corporation 2010
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4.DC/AC Specification (Example)
IN+
Operating Input
Voltage:
Single Output DC/AC
VIN,MIN=8 ~
Efficiency (n) = 80%
VIN,MAX =16(Vdc)
IN-
OUT+
Inverter
~
VO = 100(Vrms)
OUT-
DC/AC Inverter with VIN=8~16Vdc, VO=100Vrms, and Efficiency=80%
All Rights Reserved Copyright (C) Bee Technologies Corporation 2010
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5.Input-Output Characteristics
Efficiency (n)  80%
Iin(DC)
IO(AC) = 2.498A(rms)
Vin(DC)
VO(AC) decreases as VIN < VIN
VO(AC)
,MIN
Output and efficiency of the Inverter on time domain analysis.
All Rights Reserved Copyright (C) Bee Technologies Corporation 2010
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6.Simulation Circuit and Setting
Please do copy/paste
1) LTspice symbols files to C:\Program Files\LTC\LTspiceIV\lib\sym
2) LIB files to C:\Program Files\LTC\LTspiceIV\lib\sub
All Rights Reserved Copyright (C) Bee Technologies Corporation 2010
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6.Simulation Circuit and Setting
select
Waveforms
window
select
Reload Plot Settings
•
To show the simulation results with the same format (plots and axis scales) to this manual, please
select Waveforms window then select Plot Setting > Reload Plot Setting after the simulation
finished running.
All Rights Reserved Copyright (C) Bee Technologies Corporation 2010
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