PWM

Generate pulse width modulated waveforms

Since R2022b

• 

Libraries:
Embedded Coder Support Package for Infineon AURIX TC4x Microcontrollers / AURIX TC4x

Description

The block input controls the duty cycle of the square waveform for the corresponding channel. An input value of 0 produces a 0 percent duty cycle and an input value of 100 produces a 100 percent duty cycle. It accepts N x 1 values of duty cycles corresponding to the N channels selected.

Examples

Field-Oriented Control of BLDC with Encoder Using Infineon AURIX Microcontrollers

Implement the field-oriented control (FOC) technique to control the speed of a three-phase brushless DC (BLDC) motor. The FOC algorithm requires rotor position feedback, which is obtained by using an encoder sensor. For more details about FOC, see Field-Oriented Control (FOC) (Motor Control Blockset).

• Open Model

Analyze Sensorless Observers for Field-Oriented Control Using Multiple Cores of Infineon AURIX

Use Embedded Coder® Support Package for Infineon® AURIX™ Microcontrollers for sensorless field-oriented control using multiple cores of an Infineon AURIX microcontroller board. This example uses a top-level model and two referenced models. You use the TriCore0 referenced model to implement a sensor-based field-oriented control (FOC) technique to control the speed of a three-phase brushless DC (BLDC) motor. You use the TriCore1 referenced model to implement and analyze different sensorless algorithms, such as the algorithms implemented in the Flux Observer (Motor Control Blockset), Sliding Mode Observer (Motor Control Blockset), and Extended EMF Observer (Motor Control Blockset) blocks.

• Open Model

Accelerate AI Based Software Development on Infineon AURIX TC4x Microcontroller

Implement AI based motor control functions using the Model-Based Design approach by deploying a multi-layer perceptron (MLP) neural network on the Infineon® AURIX™ TC4x microcontroller.

• Open Model

Extrapolate Resolver Position Using Timestamp Information

Use the timestamp information in the Resolver block from Embedded Coder® Support Package for Infineon® AURIX™ TC4x Microcontrollers to determine the accurate position of a resolver sensor.

• Open Model

Ports

Input

duty — Input value which determines duty cycle

Float range between [0-100]

The value sent to the block input determines the duty cycle of the square wave that the board outputs on the specified PWM pin specified in PWM Peripheral Configuration.

Data Types: Float

freq — Input port determines frequency of PWM signal

scalar

The freq port determines the frequency of PWM signal for the selected channels. When you enable the frequency port, the port accepts a scalar input value and sets it as the frequency of the timer unit.

Dependencies

To enable this port, select the Enable frequency input parameter.

phase — Phase of selected channel

scalar | vector

The phase port accepts an input value in the range of 0 to 2pi and sets the phase for the corresponding channel. It accepts N x 1 values corresponding to the N channels selected.

Dependencies

To enable this port, select the Enable phase input parameter.

Data Types: single | double

dtm_rise — Rising dead time module

scalar | vector

The dtm_rise port accepts the rising dead time values in seconds. The timer unit selected in the PWM peripheral app should have DTM sub module for this feature. It accepts N x 1 values corresponding to the N channels selected.

Dependencies

To enable this port, select the Enable dead time properties input parameter.

Data Types: Float | int8 | uint8 | int16 | uint16 | int32 | uint32

dtm_fall — Falling dead time module

scalar | vector

The dtm_fall port accepts the falling dead time values in seconds. The timer unit selected in the PWM peripheral app should have DTM sub module for this feature. It accepts N x 1 values corresponding to the N channels selected.

Dependencies

To enable this port, select the Enable dead time properties input parameter.

Data Types: Float | int8 | uint8 | int16 | uint16 | int32 | uint32

Output

Status — Status of the PWM module

scalar

The block outputs the status of the PWM module as one of these values:

• 255—Unknown state

• 0— Initialized

• 1— Running

• 2— Stopped

• 3— Error

Dependencies

To view this port, select the Enable status output parameter.

Data Types: uint8

msg — SoC Blockset simulation message

bus

The port outputs the PWM bus object in the SoC Blockset™ simulation message format during simulation. The PWM bus object contains the information received by the block at the input ports.

Dependencies

To view this port, select the Enable simulation port parameter and set the port type to SoC Data (Message based).

sig — Simulink based simulation signal

scalar | vector

The port outputs the PWM bus object during simulation. The PWM bus object contains the information received by the block at the input ports.

Dependencies

To view this port, select the Enable simulation port parameter and set the port type to Signal.

Parameters

Basic

Enable frequency input — Select to enable input frequency port

off (default) | on

Select this parameter to set the PWM frequency.

When you select the Enable frequency input parameter, the block configures an input port, freq.

Enable phase input — Select to enable input phase port

off (default) | on

Select this parameter to set the phase of selected channel.

When you select the Enable phase input parameter, the block configures an input port, phase.

Enable status output — Select to configure the status port

off (default) | on

When you select the Enable status output parameter, the block configures Status output port.

Enable simulation port — Enable peripheral simulation ports in the block

off (default) | on

Select this parameter to enable peripheral simulation capability.

Port Type — Specify the type of peripheral simulation port

SoC Data (Message based) (default) | Signal

Select this parameter to configure either the SoC compatible or the Simulink^® signal based simulation ports to enable peripheral simulation capability.

Dependencies

To view this parameter, select the Enable simulation port parameter.

Advanced

Number of channels — Select required channels

1 (default) | 2 | 3 | ...

Select the required number of PWM channels to send the duty cycles. The number of channels determines the size of the input ports phase, dtm_rise, and dtm_fall.

The number of channels selected depends on the timer module selection in PWM peripheral configuration app.

• TOM—16 channels are available

• ATOM—8 channels are available

Enable dead time properties input — Select to enable rising and falling input ports

off (default) | on

Select this parameter to determine the PWM dead time value in seconds.

For more information on standard dead time generation, see Dead-Time Module Properties.

Note

Enabling the dead time properties parameter in the block configures the dtm_rise and dtm_fall input ports. To use the dead time functionality, go to PWM Peripheral Configuration in the Hardware Mapping window and configure the corresponding dead time parameters in Module and Channel tabs.

Version History

Introduced in R2022b