Simple model of DC Power Supply(LTspice)

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Simple model of DC Power Supply(LTspice)

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Simple model of DC Power Supply(LTspice)

  1. 1. DC Power Supply Simplified SPICE Behavioral Model All Rights Reserved Copyright (C) Bee Technologies Corporation 2011
  2. 2. Contents <ul><li>Model Overview </li></ul><ul><li>Benefit of the Model </li></ul><ul><li>Concept of the Model </li></ul><ul><li>DC Power Supply Specification (Example) </li></ul><ul><li>Parameter Settings </li></ul><ul><li>Operation Area Characteristics </li></ul><ul><ul><li>6.1 Simulation Circuit and Setting </li></ul></ul><ul><li>Rated Output Voltage Characteristics </li></ul><ul><ul><li>7.1 Simulation Circuit and Setting </li></ul></ul><ul><ul><li>Library Files and Symbol Files Location </li></ul></ul><ul><ul><li>Simulation Index </li></ul></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011
  3. 3. 1. Model Overview <ul><li>This DC Power Supply Simplified SPICE Behavioral Model is for users who require the model of a DC power supply as a part of their system. </li></ul><ul><li>The model focuses on the power supply’s behavior in their operation area, which user can input rated voltage, rated power, and maximum output current. </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Rated output voltage Rated output line (from Rated Power) Output Voltage [V] Output Current [A] Operation Area Maximum output current
  4. 4. 2. Benefit of the Model <ul><li>Can be easily adjusted to your own DC power supply specifications by editing the model parameters. </li></ul><ul><li>The simplified model is an easy-to-use, which can be provided without the circuit detail. </li></ul><ul><li>Time and costs are saved because only the necessary parts are simulated. </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011
  5. 5. 3. Concept of the Model <ul><li>The model is characterized by parameters: V MAX , POWER (for P RATED ), V OUT and I MAX , which represent the output voltage vs. output current characteristics of the power supply. </li></ul><ul><li>DC Power Supply Simplified SPICE Behavioral Model </li></ul><ul><li>[Spec: P RATED , V MAX , I MAX ] </li></ul><ul><li>Adjustable V OUT (  V MAX ) </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 + - Load Current V OUT
  6. 6. 4.DC Power Supply Specification (Example) <ul><li>DC Power Supply with </li></ul><ul><li>POWER = 1600W, V MAX = 80Vdc, and I MAX = 160Adc </li></ul><ul><li>V OUT is adjustable between 0 to 80V (V MAX ) </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 + - Load Current V OUT DC Power Supply Simplified SPICE Behavioral Model [Spec: P RATED , V MAX , I MAX ] Adjustable V OUT (  V MAX )
  7. 7. 5. Parameter Settings (Example) <ul><ul><li>POWER  Rated power </li></ul></ul><ul><ul><li>e.g. 400W, 800W, 1600W </li></ul></ul><ul><ul><li>Value = <POWER> </li></ul></ul><ul><ul><li>V MAX  DC maximum output voltage </li></ul></ul><ul><ul><li>e.g. 80V, 320V, 650V </li></ul></ul><ul><ul><li>Value = <VMAX> </li></ul></ul><ul><ul><li>I MAX  DC maximum output current </li></ul></ul><ul><ul><li>e.g. 40A, 80A, 160A </li></ul></ul><ul><ul><li>Value = <IMAX> </li></ul></ul><ul><ul><li>V OUT  Output voltage </li></ul></ul><ul><ul><li>0 ~ V MAX </li></ul></ul><ul><ul><li>Value = <VOUT> </li></ul></ul><ul><li>From the DC power supply specification, the model is characterized by setting parameters POWER, V MAX , and I MAX , then input V OUT value (from 0 to V MAX ). </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Model Parameters:
  8. 8. 6. Operation Area Characteristics All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Rated output voltage Maximum output current Rated output line Rated operation range
  9. 9. 6.1 Simulation Circuit and Setting <ul><li>*Analysis directives: </li></ul><ul><li>.DC LIN ILOAD 0 200 10m </li></ul><ul><li>.PROBE V(*) I(*) W(*) D(*) NOISE(*) </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 DC Sweep: ILOAD 0-200A
  10. 10. 7. Rated Output Voltage Characteristics All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Parameter VOUT = 40V 60V 80V, and 100V V(OUT) is limited by the model parameter VMAX (80V)
  11. 11. 7.1 Simulation Circuit and Setting <ul><li>*Analysis directives: </li></ul><ul><li>.TRAN 0 10m 0 10u </li></ul><ul><li>.STEP PARAM OUTPUT list 40 60 80 100 </li></ul><ul><li>.PROBE V(*) I(*) W(*) D(*) NOISE(*) </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Open Load Sweep VOUT with 40, 60, 80, and 100 V
  12. 12. Library Files and Symbol Files Location <ul><li>Copy LIB files from CD to C:Program FilesLTCLTspiceIVlibsub </li></ul><ul><li>Copy LTspice symbols files from CD to C:Program FilesLTCLTspiceIVlibsym </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 .SUB .ASY
  13. 13. Simulation Index All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Simulations Folder name <ul><li>Operation Area Characteristic....................................... </li></ul><ul><li>Rated Output Voltage Characteristic............................. </li></ul>Operation Area Rated Voltage

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