Elegir bloques y modelos matemáticos
Las bibliotecas de Simscape™ Electrical™ a menudo contienen varios bloques que pueden modelar el mismo tipo de dispositivo, pero que se basan en suposiciones de modelado diferentes. Los modelos de baja fidelidad se centran en la dinámica esencial del sistema, que permite una simulación más rápida y una parametrización más sencilla, mientras que los modelos de alta fidelidad proporcionan resultados más detallados. Para aumentar la velocidad de simulación y simplificar el proceso de diseño, elija un bloque que solo tenga el nivel de detalle necesario para responder a sus preguntas de diseño de ingeniería.
Temas
- Choose Blocks to Model Electrical Systems
Use Simscape Electrical block libraries to model and analyze electronics, mechatronics, and electrical power systems.
- Choose Blocks to Model Power Electronic Converters
Select a prebuilt converter block or discrete components to model your converter topology at the level of fidelity you need to meet your simulation goals.
- Choose Blocks to Model Semiconductor Devices
Select a block to model your semiconductor device at the level of fidelity you need to meet your simulation goals and parameterize the block.
- Choose Blocks to Model Motors or Actuators
Select a block to model your type of motor or actuator at the level of fidelity you need to meet your simulation goals.
- Choose Blocks to Model Transformers
Select a block for your application with the correct component behavior as a function of frequency.
- Model Cables and Lines in Simscape
Determine whether you need a delay-based, lumped-parameter, or distributed model and select a block that uses that model to represent your conductor arrangement.
Ejemplos destacados
DC-DC Converter Model Fidelity Comparison
Use different levels of fidelity in DC-DC converters. The system contains three buck-boost converters. The top converter uses an ideal switch at a sample time of 10 us. To yield accurate results even though the model is under sampled at a sample time of 50 us, the middle converter uses an averaged switch with averaged pulse. To further increase the sample rate and to operate as an ideal averaged converter, the bottom converter uses an averaged switch and duty cycle instead of gate pulse. The Control subsystem contains a PWM generator. The Scopes subsystem contains Scope blocks that allow you to see the simulation results.
Compare Fidelity Levels of Chopper Converters
Use different levels of fidelity in chopper converters. You change the level of fidelity by changing the values for the Fidelity level, Switching device, and Integral protection diode parameters of the Four-Quadrant Chopper block. You also change the inputs to the G port. Using a higher level of fidelity improves the accuracy of the results but it also slows down simulation.
Power Converter Model Fidelity Comparison
Use different levels of fidelity in power converters. You change the level of fidelity by changing the values for the Fidelity level, Switching device, and Integral protection diode parameters of the Converter (Three-Phase) block. You also change the inputs to the G port. Using a higher level of fidelity improves the accuracy of the results but it also slows down simulation.
A Comparison of the Mutual Inductor and Ideal Transformer Library Blocks
The differences in behavior between the Mutual Inductor and Ideal Transformer blocks in the Simscape™ Foundation Library. These two blocks both represent the same system of electromagnetically-coupled windings but make different simplifying assumptions. It is important to understand the assumptions and how they impact model fidelity as a function of frequency. With this, you can make an informed decision about which block to use in a model of your circuit.
