选择模块和数学模型
Simscape™ Electrical™ 库通常包含多个模块，这些模块可以对同一类型的器件进行建模，但进行不同的建模假设。低保真模型侧重于系统的基本动态特性，从而实现更快的仿真和更简单的参数化，而高保真模型则提供更详细的结果。为了加快仿真速度并简化设计过程，请选择一个只包含解决工程设计问题所需细节的模块。
主题
- 选择模块来建模电气系统
使用 Simscape Electrical 模块库对电子设备、机电一体化系统和电力系统进行建模与分析。
- 选择模块来建模电力电子变换器
选择合适的预制转换器模块或离散元件，以所需保真度水平建模转换器拓扑，满足您的仿真目标。
- 选择模块来建模半导体器件
确定所需的保真度级别，选择正确的模块以该保真度级别对半导体器件进行建模，并为模块进行参数化设置。
- 选择模块来建模电机或作动器
确定所需的保真度级别，并选择能够以该保真度级别建模您所用电机或作动器类型的此模块。
- 选择模块来建模变压器
为您的应用选择一个模块，其组件行为应随频率函数变化而变化。
- 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.
精选示例
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.
