Generate pulses for PWM-controlled 2-level converter
产生脉冲-PWM控制的两电平变换器
Description
The PWM Generator (2-Level) block generates pulses for carrier-based pulse width modulation (PWM) converters using two-level topology. The block can control switching devices (FETs, GTOs, or IGBTs) of three different converter types: single-phase half-bridge (1 arm), single-phase full-bridge (2 arms), or three-phase bridge (3 arms).
PWM发生器（2）块产生的脉冲宽度调制（PWM）使用的载波脉冲的两级拓扑结构的变换器。块可以控制开关器件（GTO或IGBT，FET）的三种不同的转换器类型：单相半桥（1臂），单相全桥（2臂），或三相桥（3臂）。
The reference signal (Uref input), also called modulating signal, is compared with a symmetrical triangle carrier. When the reference signal is greater than the carrier, the pulse for the upper switching device is high (1), and the pulse for the lower device is low (0).
参考信号（UREF输入），又称为调制信号，是一个对称的三角载波比较。当参考信号大于载波时，脉冲为上升沿开关高（1），较低的设备脉冲低（0）。
To control a single-phase full-bridge device, you can select unipolar or bipolar PWM modulation. Using the unipolar modulation, each arm is controlled independently. A second reference signal is internally generated by phase-shifting the original reference signal by 180 degrees. Using the bipolar modulation, the state of the lower switching device of the second arm is the same as the state of the upper switch of the first arm, and the state of the upper switch of the second arm is the same as the state of the lower switch of the first arm. The unipolar modulation produces better quality AC waveform, but the bipolar modulation produces very low-varying common-mode voltage.
要控制一个单相全桥装置，可以选择单极或双极性的脉宽调制。使用单极性调制，每个臂独立控制。第二个参考信号是间原参考信号相移180度后产生的。使用双极性调制，第二臂的下开关装置的状态与第一臂的上开关，第二臂上开关的状态与第一臂下开关的状态相同。单极性调制产生更好的交流音频质量改革，但双极调制产生非常低共模电压变化。
The figure describes the three techniques to sample the reference signal Uref. The natural sampling technique models the behavior of an analog implementation of a PWM generator. Using the two regular sampling techniques, Uref can be sampled twice at both the valley and the peak of the carrier or only once at the valley of the carrier. The former is referred to as asymmetrical sampling or double-edge technique. The latter is called symmetrical sampling or single-edge technique. 图三描述的技术样本参考信号UREF。自然采样技术模型的一个模拟实现的一个脉冲发生器的行为。使用两个规则抽样技术，UREF可以两次采样，在山谷和载体的峰值或只有一次在承运人的山谷。前者被称为非对称采样或双GE技术。后者被称为对称采样或单边缘技术。
Reference Signal Sampling Techniques
Dialog Box and Parameters 对话框和参数
Generator type
Specify the number of pulses to generate. The number of pulses generated by the block is proportional to the number of bridge arms to fire.
指定要生成的脉冲数。由该块产生的脉冲数成正比的桥臂的数量，以发射波形。
Select Single-phase half-bridge (2 pulses) to fire the self-commutated devices of a single-phase half-bridge converter. Pulse 1 fires the upper device, and pulse 2 fires the lower device.
选择单相半桥（2脉冲）火自换相的单相半桥变换器装置。脉冲1发射上装置，脉冲2发射较低的装置。
Select Single-phase full-bridge (4 pulses) to fire the self-commutated devices of a single-phase full-bridge converter. Four pulses are then generated. Pulses 1 and 3 fire the upper devices of the first and second arm. Pulses 2 and 4 fire the lower
devices.
选择单相全桥（4脉冲）火自换相的单相全桥变换器装置。然后产生四个脉冲。脉冲1和3火的上限装置的冷杉第一和第二臂。脉冲2和4火的较低的设备。
Select Single-phase full-bridge - Bipolar modulation (4 pulses) to fire the self-commutated devices of a single-phase full-bridge converter. Four pulses are then generated. Pulses 1 and 3 fire the upper devices of the first and second arm. Pulses 2 and 4 fire the lower devices. Pulses 1 and 4 are identical. Pulses 2 and 3 are identical.
Select Three-phase bridge (6 pulses) to fire the self-commutated devices of a three-phase bridge converter. Pulses 1, 3, and 5 fire the upper devices of the first, second, and third arms. Pulses 2, 4, and 6 fire the lower devices.
选择三相桥式（6脉冲）火自换相的三相桥式变换器装置。脉冲1，3，和5火的第一，第二和第三武器的上部装置。脉冲2，4，和6火的较低的设备。
Carrier: Mode of operation
When set to Unsynchronized, the frequency of the unsynchronized carrier signal is determined by the Frequency parameter.
载体：调制方式
当设置为非同步的同步载波信号的频率由频率参数的确定。
When set to Synchronized, the carrier signal is synchronized to an external reference signal (input wt) and the carrier frequency is determined by the Switching ratio parameter.
当设置为同步时，载波信号是同步到一个外部参考信号（输入（重量））和载波频率是由开关比参数确定。
Carrier: Frequency (Hz)
Specify the frequency, in hertz, of the triangular carrier signal. This parameter is available only if the Mode of operation parameter is set to Unsynchronized. 指定的频率，在赫兹，三角形的载波信号。此参数仅当操作参数设定不可用。
Carrier: Initial phase (degrees)
Specify the carrier initial phase, in degrees. A value of 90 degrees means that the triangle carrier initial position is set to midpoint between its minimum and maximum value and the slope is positive.
载体：初始阶段（度）
指定载波初始阶段。90度的值意味着三角形载体初始位置设置为它的最小值和最大值之间的中点，斜率为正的。
This parameter is available only if the Mode of operation parameter is set to Unsynchronized.
此参数仅当操作参数设定不可用。
Carrier: Minimum and maximum values
Specify the minimum (valley) and maximum (peak) values of the triangular carrier signal.
载体：最小值和最大值
指定三角载波信号的最小（谷）和最大值（峰值）
Switching ratio (carrier frequency/output frequency)
Specify the frequency (Fc) of the triangular carrier signal.
Fc=SwitchingRatio×OutputVoltageFrequency
开关比（载波频率/输出频率）
指定三角载波信号的频率（频率）。
FC = switchingratio×outputvoltagefrequency
This parameter is available only if the Mode of operation parameter is set to Synchronized.
只有当操作参数的模式设置为同步时，才可用此参数。
Reference signal: Sampling technique
Specify how the reference signal is sampled: Natural, Asymmetrical regular (double edge), or Symmetrical regular (single edge).
参考信号：采样技术
指定如何采样参考信号：自然的，非对称的正则（双边），或对称的正则（单边）。
If you select a regular sampling technique, the Sample time parameter must be an integer submultiple of the sampling period. The sampling period is equal to 1/Carrier Frequency/2 for asymmetrical sampling and to 1/Carrier Frequency for symmetrical sampling.
如果你选择一个正规的采样技术，采样时间参数必须是采样周期的整数因数。采样周期等于1 /频率/ 2不对称桑普用于对称采样的灵和1 /载波频率。
Reference signal: Internal generation of reference signal
When selected, the reference signal is generated by the block.
When not selected, external reference signals are used for pulse generation.
This parameter is available only if the Mode of operation parameter is set to Unsynchronized.
参考信号：参考信号的内部生成
当选择时，参考信号是由块产生的。
当没有选择时，外部参考信号用于脉冲产生。
此参数仅当操作参数设定不可用。
Reference signal: Modulation index
Specify the modulation index to control the amplitude of the fundamental component of the output voltage of the converter. The modulation index must be greater than 0 and lower than or equal to 1. This parameter is available only when the Internal generation of reference signal parameter is selected.
参考信号：调制指数
指定要控制转换器的输出电压的基波分量的振幅的调制指数。调制指数必须大于0，低于或等于1。THI只有当选择参考信号参数的内部产生时，才可使用S参数。
Reference signal: Frequency (Hz)
Specify the output voltage frequency used to control the frequency of the fundamental component of the output voltage of the converter. This parameter is available only when the Internal generation of modulating signal (s) parameter is selected.
参考信号：频率（赫兹）
指定用于控制转换器输出电压基波分量的频率的输出电压频率。此参数仅当内部生成选择调制信号（S）参数。
Reference signal: Phase (degrees)
Specify this parameter to control the phase of the fundamental component of the output voltage of the converter. This parameter is available only when the Internal generation of modulating signal (s) parameter is selected.
参考信号：相位（度）
指定此参数来控制转换器的输出电压的基本组成部分的相位。此参数仅当内部产生的调制信号（S）参数选择。
Sample time
Specify the sample time of the block, in seconds. Set to 0 to implement a continuous block. If you select a regular sampling technique, the Sample time parameter must be an integer submultiple of the sampling period. The sampling period is equal to 1/Carrier Frequency/2 for asymmetrical sampling and to 1/Carrier Frequency for symmetrical sampling.
采样时间
指定块的采样时间，以秒为。设置为0来实现一个连续块。如果你选择一个正规的采样技术，采样时间参数必须是一个整数的约数采样周期。采样周期等于1 /载波频率/ 1的非对称采样和2 /载波频率的对称采样。
Show measurement port
Select this check box to add a Simulink?output to the block. The output returns the carrier signal that is used to determine the output pulses and the sampled reference signal.
显示测量端口
选择此复选框以添加一个Simulink?输出块。输出返回用于确定输出脉冲和采样参考信号的载波信号。
Inputs and Outputs
Uref
The vectorized reference signal used to generate the output pulses. The input is visible only when the Internal generation of modulating signal (s) is not selected.
Connect this input to a single-phase sinusoidal signal when the block is used to control a single-phase half- or full-bridge converter, or to a three-phase sinusoidal signal when the PWM Generator block is controlling a three-phase bridge converter. For linear operation of this block, the magnitude of Uref must be between ?1 and +1.
输入和输出
UREF
用于产生输出脉冲矢量的参考信号。只有当内部生成调制信号（S）不被选中时，才可见输入。这个输入连接到一个单一的相E的正弦信号时，块用于控制单相半或全桥变换器，或一个三相正弦信号时，PWM发生器模块是控制三相桥DGE转换器。对于这一块的线性操作，Uref的大小必须?1和1之间。
wt
The external reference signal used to synchronize the carrier. This Simulink input port is not present when Carrier: Mode of operation is set to Unsynchronized. WT
用于同步载波的外部参考信号。这个仿真输入端口不存在当载体：操作模式设置为不同步。 P
The output contains the two, four, or six pulse signals used to fire the self-commutated devices (MOSFETs, GTOs, or IGBTs) of a one-, two- or three-arm converter.
P
输出包含两，四，或六个脉冲信号用于火灾自关断器件（MOSFET或IGBT，GTO，）一一，两或三臂变换器。
m
The measurement output that returns the carrier signal used to determine the output pulses and the sampled reference signal. This port is present only when Show measurement port is selected.
Characteristics
Sample Time Specified in the Sample Time parameter
Continuous if Sample Time = 0
Scalar Expansion No
Dimensionalized No
返回所使用的载波信号的测量输出，用于确定输出脉冲和采样参考信号。此端口只有在显示测量端口时才存在。
特性，特征，特色，[数]（对数的）首数(characteristic的名词复数)；独特性；性质；
样本时间参数中指定的样本时间
连续如果采样时间= 0
标量不扩张
没有dimensionalized
Examples案例
The power_PWMGenerator2Level model uses a simple circuit to illustrate the operation of the PWM Generator (2-Level). Run the simulation and use the FFT Analysis tool of the Powergui block to see the harmonics and the THD value of the voltages produced by the three-phase two-level converter.
例子；榜样(example的名词复数)；例子；样本；样板；
的power_pwmgenerator2level模型使用一个简单的电路来说明PWM发生器的操作（2）。运行仿真和Powergui使用的块的FFT分析工具看到Harmonics和由三相两电平转换器产生的电压的THD值。
The model sample time is parameterized by the Ts variable set to a default value of 50e-6 s. Set Ts to 0 in the command window and change the Simulation type parameter of the Powergui block to Continuous to simulate the model in continuous mode.
例子；榜样(example的名词复数)；例子；样本；样板；
的power_pwmgenerator2level模型使用一个简单的电路来说明PWM发生器的操作（2）。运行仿真和Powergui使用的块的FFT分析工具看到Harmonics和由三相两电平转换器产生的电压的THD值。
The power_BipolarPWMGenerator model shows a comparison between unipolar PWM and bipolar PWM techniques.
power_bipolarpwmgenerator模型显示的单极性PWM双极性PWM技术的比较。
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