电子、机电和电力系统网络建模与仿真
了解基本建模与仿真技术，例如：
在复合三相端口和扩展三相端口之间切换
在物理信号端口和电气端口之间切换
使用热端口对热效应进行仿真
主题
- Essential Electrical Modeling Techniques
Apply Simscape™ modeling rules when you build electronic, mechatronic, and electrical power system networks using Simscape Electrical™.
- Three-Phase Ports
Connect three-phase blocks using composite ports for three-phase lines or expanded ports for single-phase lines.
- Switch Between Physical Signal and Electrical Ports
Switch between a physical signal port and an electrical conserving port on a Simscape Electrical block.
- Selecting the Output Model for Logic Blocks
Explore the two output models available for logic blocks.
- Simulating an Electronic, Mechatronic, or Electrical Power System
Explore best practices and techniques for simulating Simscape Electrical models.
- Simulating Thermal Effects in Semiconductors
Simulate generated heat and device temperature by using the thermal ports.
- Simulating Thermal Effects in Rotational and Translational Actuators
Simulate generated heat and device temperature by using the thermal ports.
- Photovoltaic Thermal (PV/T) Hybrid Solar Panel
Model a multi-domain power cogeneration system using Simscape, Simscape Electrical, and Simscape Fluids™.
- Build and Simulate a Single-Phase Half-Bridge Inverter with Ideal Switches
Build a Simscape Electrical model of a single-phase half-bridge inverter with ideal switches, run the model, and examine the results.
- Build and Simulate Single-Phase Half-Bridge Inverter with Ideal Switches and Thermal Port
Build a Simscape Electrical model of a single-phase half-bridge inverter with ideal switches and a thermal port, run the model, and examine the results.
精选示例
使用 PWM 电压源和 H 桥驱动器控制 DC 电机
此示例展示了如何使用 Controlled PWM Voltage 和 H-Bridge 模块来控制 DC 电机。DC Motor 模块在 2500 rpm 转速下提供 10 W 的机械功率，并且在 DC 电源电压为 12 V 时以 4000 rpm 的空载转速运行。因此，如果将 PWM 参考电压设置为其最大值 5 V，电机将以 4000 rpm 的转速运行。如果将 PWM 参考电压设置为 2.5 V，电机将以约 2000 rpm 的转速运行。为了实现快速仿真，此示例将 Controlled PWM Voltage 模块和 H-Bridge 模块的仿真模式参数设置为 Averaged。要验证平均行为，请在 Controlled PWM Voltage 模块和 H-Bridge 模块中将 Simulation mode 参数都设置为 PWM。
Model Triangle Wave Generator Using Operational Amplifiers
Model a triangle wave generator circuit by using two Band-Limited Op-Amp blocks. The first stage of the circuit represents a comparator constructed from an op-amp. Two Diode blocks model the Zener diodes that limit the output of the comparator to plus or minus 5 V. These limits result in a square wave.
模拟抗混叠滤波器
此示例展示了用于模数转换器的抗混叠滤波器的模拟实现。滤波器截止频率设置为 500 Hz ，以便匹配 1 kHz 的模数转换器采样频率。测试信号包含一个期望的 50 Hz 正弦波和一个 1100 Hz 的较高频率分量，在 1 kHz 模数转换器采样频率下无法捕获该频率分量。示波器显示了不应用抗混叠和应用抗混叠时捕获的信号。使用抗混叠滤波器时，正确测量了 50 Hz 正弦波振幅，振幅为 1，对应功率为 0.5 W（即对于 1 欧姆参考负载为 27 dBm）。
使用 555 计时器的 PWM 电路
此示例展示了在无稳态模式下使用 555 计时器实现的脉冲宽度调制 (PWM) 输出。占空比由电位计 P1 设置。该电位计在运行期间通过占空比控制旋钮控制。示波器显示了 555 计时器的输出结果。要结束仿真，请点击“停止”按钮。
Use of Peltier Device as Thermoelectric Cooler
A Peltier device working in cooling mode with a hot side temperature of 50 degC. In cooling mode, the Coefficient of Performance (COP) of the Peltier cell is equal to the total heat transferred through the Thermoelectric cooler (TEC) divided by the electric input power, COP = Qc/Pin.
电动助力转向
此示例展示了如何使用永磁同步电机 (PMSM) 在汽车助力转向系统中放大驾驶员施加的力。
Quantifying IGBT Thermal Losses
The generation of a temperature profile based on switching and conduction losses in an insulated-gate bipolar transistor (IGBT). There are two buck converters. For one converter, the IGBT attaches to a Foster thermal model. For the other converter, the IGBT attaches to a Cauer thermal model. The parameters for the thermal models are tuned to give roughly equivalent results. At a simulation time of 50ms, the driving frequency changes from 40kHz to 20kHz, which increases the conduction losses and decreases the switching losses. The change in the losses results in a corresponding change in the temperature of the IGBT.
降压转换器电压控制
此示例展示了如何控制降压转换器的输出电压。为了调整占空比，Control 子系统使用基于 PI 的控制算法。在整个仿真过程中，输入电压被视为恒定的。一个可变电阻器为系统提供负载。总仿真时间 (t) 为 0.25 秒。在 t = 0.15 秒时，负载发生变化。
燃料电池系统
此示例展示了一个在化学计量条件和标称参数下运行的燃料电池系统。所输出的功率随氢气压力的变化而变化。
Comparison of Three-Phase Port Types
A comparison of Composite three-phase ports versus Expanded three-phase ports. The first circuit shows a Voltage Source configured with a Composite three-phase port. A Phase Splitter block provides the interface to the Simscape™ foundation library electrical elements. The second circuit shows a Voltage Source configured with an Expanded three-phase port which can connect directly to the Simscape foundation library electrical elements. The Voltage Source can be changed from Composite to Expanded three-phase ports by use of the Modeling option mask parameter.
Three-Phase Two-Level PWM Generator
Use the PWM Generator (Three-phase, Two-level) to control a Converter. The inputs to the PWM Generator are reference AC waveforms and a DC-link voltage of 400 V. There is one time scope for the controller waveforms.
三相三电平 PWM 发生器
此示例展示了如何使用 PWM 发生器（三相，三电平）来控制三电平转换器。上、下电源电压输入到中性点控制器，该控制器平衡 DC 链路电容器电压。参考 AC 波形用作 PWM 发生器的输入。控制器波形有一个时间示波器。
Custom Solenoid with Magnetic Hysteresis
A limited travel solenoid with return spring. Magnetic hysteresis is modeled using the Reluctance with Hysteresis library block.
Average-Value Chopper Control
Control a four-quadrant chopper. The Control subsystem implements a simple PI-based control algorithm for controlling the output current. An average-value Chopper model is used to speed up the simulation. The simulation uses both positive and negative references. The total simulation time (t) is 1 s. At t = 0.5 s, the polarity of the load DC source E changes.
Energy Scavenger
How the performance of a rotational energy scavenger can be explored using a simple representative model. Electrical energy is produced from an off-center mass attached to the shaft of a DC motor. The mass, geometry, motor and electrical parameters must be matched to the expected mechanical excitation. The generated electrical power is less than the extracted mechanical power primarily due to motor winding losses and viscous damping for the rotor. This example is based on Nunna, K. "Constructive interconnection and damping assignment passivity-based control with applications", Imperial College London (2014). The model here is simplified in that the DC-DC converter is omitted.
