PWM Generator (DC-DC)
Generate pulse for PWM-controlled DC-DC converter
Simscape / Electrical / Specialized Power Systems / Power Electronics / Power Electronics Control
The PWM Generator (DC-DC) block outputs a pulse to fire the MOSFET, GTO, or IGBT switch of a one-quadrant converter (buck or boost). The duty cycle of the generator is specified by the input D. A value between 0 and 1 determines the percentage of the pulse period that the output is on.
- Switching frequency (Hz)
Specify the switching frequency Fsw of the generator, in hertz. The switching frequency is the frequency of the internal sawtooth signal used to generate the pulse. Default is
- Sample time
Specify the sample time of the block, in seconds. Set to 0 to implement a continuous block. Default is
Inputs and Outputs
The duty cycle of the generator. Specify a signal with a value between 0 and 1.
Outputs the pulse.
|Sample Time||Specified in the Sample Time parameter|
Continuous if Sample Time = 0
shows the operation of the PWM Generator (DC-DC) block. Run the simulation
for various duty cycles values and observe the resulting voltage and
current on the Scope block.
The model sample time is parameterized with variable Ts (default
value Ts =
500e-9). To run a continuous simulation,
at the MATLAB® command prompt, enter
Ts = 0
Continuousbefore starting the simulation.