Characteristic curve auto-generation in saber Luo Ling PhD Research Engineer 2007.10.18

Agenda Origin and intention of curve auto generation. Key points to go through. An example demo. Process of curve auto-generation. Appendix

Origin and intention of curve auto generation An example chart What will we get from the chart?

Origin and intention of curve auto generation Quicker and easier for engineers to understand the basic principle of the system. Can present the relationship between the different physical variables obviously. First check whether the circuit is able to fulfill the specification or not. Easy and quick to do the characteristic comparison between the different topologies. Improve the work efficiency to access the system analysis and design, such as components parameters design; controller design.

Key points to go through Special applied skills of saber. (basic) Applications of general functional module. (key) The measure modules in the existing library Self-constructed modules. Modules remarks: To improve the work efficiency, both should be generally purpose applied modules. Convenient to be transferred, no need to debug or construction.

Applications of general functional module Two ways: 1) Use the modules in the existing library Some general measure modules are already existing in the library, they can be used as you need, the catalog is, \power system\instruments\measurement\

Applications of general functional module Library measurement block example Problem: The modules are limit, can not meet most requirement of system analysis, then?

Applications of general functional module Self-constructed modules Characteristic Can freely realize different required measure and compute function based on system. Such as power, PF, efficiency and stress on components. Can realize the signals analysis Such as waveform spectrum analysis, THD value compute. How to build the modules? First is to make clear what functions are required. Second is to understand and master the theory required. Third is to consider the mathematic analysis based on the system. Finally is to realize the expected function. Above is for the developer. For users, no need to consider about the details .

General functional module Towards this topic, for energy converter system, five different kinds of such modules are constructed at present. Single phase AC/DC system (Pout, Pin, PF, efficiency) Three phase AC/DC system (same as above) Three phase AC/AC system (same as above) Waveform spectrum analysis and THD value compute (three kinds) RMS value compute In addition, there are many other modules and circuits, such as different controllers for variable power converter system, and svpwm module, which are listed in the appendix and available on the pre-research simulation library.

General functional module Module example – for three phase AC/AC system I/O ports, 13 inputs 3 phase AC input current and voltage. 3 phase AC output current and voltage. Sample frequency setup (>=2*freq) where “freq” is the highest frequency considered of the signal. 5 outputs Realize the functions, Input/output power calculation; PF of input/output side; Efficiency of the system.

How to realize the curve auto generation? Steps: 1) System model construction in saber. 2) Build the corresponding net list, run required analysis. 3) Set “vary” parameters, run the analysis, get the primarily required waveforms. 4) Do the post-processing towards the waveforms, get the final required result curves.

An example demo 3 phase diode Circuit 6pulse_diode_circuit_demo.ai_sch

An example demo Result waveforms got from curve auto generation

References Power electronics converters ,applications and design. Ned mohan, Tore m.undeland, Williamp.robbins. Power electronics circuits. ISSA batarseh. IEC 61000-3-2-2005 Prepared by the international Electrical commission. IEC 61000-4-7-2005 Prepared by the international Electrical commission.

Appendix 1 - Process of the curve auto-generation 4 steps are required. (1) System model construction.

Appendix 1 - Process of the curve auto-generation (2) Build the netlist, run transient analysis.

Appendix 1 - Process of the curve auto-generation (3) Run “vary” analysis, get the primary required waveforms in scope.

Appendix 1 - Process of the curve auto-generation

Appendix 1 - Process of the curve auto-generation (4) Do the post-processing towards the waveforms, get the final curves. 1) measure

Appendix 1 - Process of the curve auto-generation

Appendix 1 - Process of the curve auto-generation

Appendix 2 - General functional module construction General purpose function modules list 1. Measure funtion Single phase AC/DC system (Pout, Pin, PF, efficiency) Three phase AC/DC system (same as above) Three phase AC/AC system (same as above) Waveform spectrum analysis and THD value compute (three kinds) RMS value compute 2. Control function Voltage loop controller, suitable for 3 and single phase PFC/ DC circuit, Zeros- Poles algorithm. Voltage loop controller, suitable for 3 and single phase PFC/ DC circuit, PI Current loop controller of current source rectifier, including Zeros-Poles control algorithm and SVPWM modulation. 3 phase AC system control, both for any loop. Zeros- Poles control algorithm Current loop control of 3 phase rectifier. Using PI algorithm. All above are executed in digital way

Appendix 2 - General functional module construction Module 1 – for single phase AC/DC system I/O ports, 6 inputs AC input current and voltage DC output current and voltage 4 outputs Realize the functions, Input/output power calculation; PF of input/output side; Efficiency of the system.

Appendix 2 - General functional module construction Module 1– Source code for single phase AC/DC system

Appendix 2- General functional module construction Module 2 – for three phase AC/DC system I/O ports, 12 inputs 3 phase AC input current and voltage DC output current and voltage 5 outputs Realize the functions, Input/output power calculation; PF of input/output side; Efficiency of the system.

Appendix 2 - General functional module construction Module 2 – Source code for three phase AC/DC system

Appendix 2 - General functional module construction Module 3 – for three phase AC/AC system I/O ports, 12 inputs 3 phase AC input current and voltage 3 phase AC output current and voltage 5 outputs Realize the functions, Input/output power calculation; PF of input/output side; Efficiency of the system.

Appendix 2 - General functional module construction Module 3 – Source code for three phase AC/AC system

Appendix 2 - General functional module construction Module 4 – for waveform spectrum analysis and THD compute (1) I/O ports, Measured signal outputs THD value

Appendix 2 - General functional module construction Module 4 – Source code for THD module (1)

Appendix 2 - General functional module construction Module 4 – for waveform spectrum analysis and THD compute (2) I/O ports, Measured signal outputs THD value Each order harmonics amplitude value

Appendix 2 - General functional module construction Module 4 – Source code for THD module (2)

Appendix 2 - General functional module construction Module 4 – for waveform spectrum analysis and THD compute (3) I/O ports, Measured signal outputs THD value

Appendix 2 - General functional module construction Module 4 – Source code for THD module (3)

Appendix 2 - General functional module construction Module 5 – For RMS value compute I/O ports, Measured signal outputs RMS value

Appendix 2 - General functional module construction Module 5 – Source code for RMS value compute

Questions? Thanks