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Monitoring Signals

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2020 Microchip Technology Inc.

DS50002997A-page 29

7.4

MONITORING SIGNALS ON A SINGLE PLOT

Multiple signals can be multiplexed together using a Signal Multiplexer:

FIGURE 7-13:

Signal Multiplexer.

FIGURE 7-14:

Signals Multiplexed to a Scope.

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Содержание PLECS

Страница 1: ...2020 Microchip Technology Inc DS50002997A PLECS Model Quick Start Guide for Vienna PFC...

Страница 2: ...may have a right to sue for relief under that Act Trademarks The Microchip name and logo the Microchip logo Adaptec AnyRate AVR AVR logo AVR Freaks BesTime BitCloud chipKIT chipKIT logo CryptoMemory...

Страница 3: ...5 1 Front End Input 16 5 2 Power Stage 17 5 3 Controller 18 Chapter 6 Modifying Control Parameters and Component Values 20 Chapter 7 Monitoring Signals 7 1 Multi Domain Model 23 7 2 Monitoring a Sign...

Страница 4: ...6 Modifying Control Parameters and Component Values Chapter 7 Monitoring Signals Chapter 8 Saving and Exporting Scope Traces Chapter 9 Power Meter NOTICE TO CUSTOMERS All documentation becomes dated...

Страница 5: ...dialog button Click OK A tab Click the Power tab N Rnnnn A number in verilog format where N is the total number of digits R is the radix and n is a digit 4 b0010 2 hF1 Text in angle brackets A key on...

Страница 6: ...latest software releases and archived software General Technical Support Frequently Asked Questions FAQs technical support requests online discussion groups Microchip consultant program member listing...

Страница 7: ...power electronics circuits and systems Using ideal switches it simulates the dynamic behavior of complex systems quickly and efficiently It uses a multi domain approach to simultaneously simulate the...

Страница 8: ...ersions have identical core capabilities and models can be exchanged between the two versions The Vienna PFC Reference Design was modeled using PLECS Standalone For a trial version of PLECS Standalone...

Страница 9: ...PIL checkbox to include Processor In the Loop capability as illustrated in Figure 1 2 FIGURE 1 2 Requesting Standalone Trial License For a video walk through of the PLECS Standalone installation see...

Страница 10: ...and Component Models The Projects folder contains a subfolder for the Vienna PFC reference design Future reference designs will be added to this folder Within the Vienna PFC folder are subfolders cont...

Страница 11: ...ICK START GUIDE FOR VIENNA PFC Chapter 3 PLECS Settings Double click on the model file Vienna PFC rev1 plecs which is found within the Vienna PFC project folder The model and library browser will open...

Страница 12: ...shown in the PLECS installation section FIGURE 3 3 PIL License Warning Under File PLECS Preferences in the General tab increase the cache size limit preferably to 4 GBytes but no more than one third...

Страница 13: ...PLECS Settings 2020 Microchip Technology Inc DS50002997A page 13 FIGURE 3 5 Adding Paths to the Thermal Descriptions...

Страница 14: ...the desired stop time FIGURE 4 1 Simulation Parameter Vienna Stop Time To adjust the line and load settings select the Initialization tab The commands listed in this window below are run once at the...

Страница 15: ...e Frequency and Phase offset As shown below the variables defined in the initialization are passed to the voltage source This approach allows the line conditions to be available to the other model blo...

Страница 16: ...ns as the default 5 1 FRONT END INPUT The front end input default configuration is an EMI filter This contains the passive elements of the filter as well as voltage and current sensing points Alternat...

Страница 17: ...age configurations Power Stage and Power Stage with Thermal Model The thermal model includes Boost inductor core loss Schottky barrier diode conduction loss and temperature MOSFET conduction loss swit...

Страница 18: ...e Time Domain Model configuration operates at an update rate of 35 kHz The model includes all the controls features of the Vienna PFC reference design except for the in rush relay control protection a...

Страница 19: ...PLECS Model Quick Start Guide for Vienna PFC DS50002997A page 19 2020 Microchip Technology Inc FIGURE 5 6 Controller Subsystem Selection...

Страница 20: ...ation tab The variables are available as global variables to components and subsystems It also executes the initialization commands contained in the mask of each subsystem Variables defined in a mask...

Страница 21: ...Modifying a Component Value To open a subsystem Double click the subsystem not applicable to configurable subsystems Right click the subsystem select Subsystem Look under mask Select the subsystem wit...

Страница 22: ...URE 6 5 Block Parameters Vienna PFC PLECS includes switches that can be operated during the simulation The following subsystem is the third harmonic injection for balancing the voltage on the output c...

Страница 23: ...or are used to convert the signal from the respective domain to the control domain An alternative to using meters is to use probes Probes convert physical attributes of a component or subsystem to the...

Страница 24: ...owser automatically opens on PLECS start up It also be accessed by selecting Window Library Browser from the menu or by Ctrl L Drag it from the library browser onto the schematic by clicking on the co...

Страница 25: ...5 FIGURE 7 4 Voltage Measurement using Voltmeter Next drag a Scope from the library browser to the schematic You can find it under the System or type in scope in the search bar Connect the green termi...

Страница 26: ...FIGURE 7 6 Power Meter Run the simulation Simulation Start or Ctrl T Double click the scope to see the signal trace To zoom in on the time axis click on the plot and drag the mouse horizontally To zo...

Страница 27: ...ignals 2020 Microchip Technology Inc DS50002997A page 27 FIGURE 7 8 Zoomed in Time Axis Measuring current is done is a similar way except the Ammeter connects inline with the electrical signal FIGURE...

Страница 28: ...the number of plots in the Scope Parameters window The scope will have a green terminal for each plot FIGURE 7 10 Multiple Plot Selection FIGURE 7 11 Multi Plot Scope The example below monitors the sw...

Страница 29: ...rochip Technology Inc DS50002997A page 29 7 4 MONITORING SIGNALS ON A SINGLE PLOT Multiple signals can be multiplexed together using a Signal Multiplexer FIGURE 7 13 Signal Multiplexer FIGURE 7 14 Sig...

Страница 30: ...ponents and some subsystems have signals available that do not require access through a meter Instead it is accessible with the Probe component found in the library browser Place the Probe on the sche...

Страница 31: ...e 7 6 MONITORING SUBSYSTEM SIGNALS WITH PROBE To simplify the measurement of various circuits and subsystems the Vienna PFC model includes predefined probes within the power stage and controller schem...

Страница 32: ...PLECS Model Quick Start Guide for Vienna PFC DS50002997A page 32 2020 Microchip Technology Inc FIGURE 7 21 Probe Signals Plotted in Scope...

Страница 33: ...t can be loaded in subsequent simulation runs using File Load trace data FIGURE 8 1 Saving Scope Traces The plot data can be exported into a pdf bitmap or csv file for reports or further analysis FIGU...

Страница 34: ...PLECS Model Quick Start Guide for Vienna PFC DS50002997A page 34 2020 Microchip Technology Inc FIGURE 8 3 Hold Current Trace FIGURE 8 4 Traces Window...

Страница 35: ...descriptions of the devices The core losses are based on the core data sheet core loss graph Since the losses are not included in the electrical domain they are added to the input power from the elect...

Страница 36: ...PLECS Model Quick Start Guide for Vienna PFC DS50002997A page 36 2020 Microchip Technology Inc FIGURE 9 2 Power Meter Subsystem...

Страница 37: ...00 China Xian Tel 86 29 8833 7252 China Xiamen Tel 86 592 2388138 China Zhuhai Tel 86 756 3210040 ASIA PACIFIC India Bangalore Tel 91 80 3090 4444 India New Delhi Tel 91 11 4160 8631 India Pune Tel 91...

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