DO-PWM – Direct output PWM

The Direct output PWM block sets PWM output(s) directly to ‘0’ or ‘1’.

This technique is typically used for Model-Predictive Control (MPC) or Direct Torque Control (DTC). An example of an application is shown in DTC of a Permanent Magnet Synchronous Motor.

Like the other PWM blocks, the Direct output PWM block supports dead-time generation and can be activated or deactivated. More information is available on the PWM page.

Simulink block

Signal specification

• The input in sets the PWM output to ‘1′ (in>0) or to ‘0’ (in<=0)
• The input A allows the activation (>0) or deactivation (<=0) of the PWM output(s).
• The output(s) is/are the generated PWM signal(s), according to the selected output mode. The output(s) is/are only used in simulation.

Parameters

• Device ID selects which B-Box/B-Board to address when used in a multi-device configuration.
• Output mode selects between a single PWM signal or complementary signals with a deadtime.
• Addressed PWM selects the PWM outputs to address.
• Show ”activate” input makes the A signal input visible. If not checked, the block is active by default.
• Dead-time duration: configures the dead-time duration if the Output mode is set at Dual (PWM_H + PWM_L).

PLECS block

Signal specification

• The input in sets the PWM output to ‘1′ (in>0) or to ‘0’ (in<=0)
• The input A allows the activation (A>0) or deactivation (A<=0) of the PWM output(s).
• The target outport(s) (only visible at the atomic subsystem level) is/are the generated PWM signal(s), according to the selected output mode. The output(s) is/are only used in simulation.

Parameters

• Device ID selects which B-Box/B-Board to address when used in a multi-device configuration.
• Output mode selects between a single PWM signal or complementary signals with a deadtime.
• Output lane(s) or Output channel(s) (vectorizable) selects the PWM outputs to address.
• PWM activation makes the A signal input visible if the option “Use block input“ is selected. If not, the CB-PWM block is activated by default.
• Dead-time duration configures the dead-time duration if the Output mode is set at Dual (PWM_H + PWM_L).

C++ functions

Functions specific to the direct-output PWM

void DoPwm_SetOn(tPwmOutput output, unsigned int device=0);
Code language: C++ (cpp)

void DoPwm_SetOff(tPwmOutput output, unsigned int device=0);
Code language: C++ (cpp)

Functions common to all PWM drivers

These functions are common to all PWM blocks. Further documentation is available on the PWM page.

void DoPwm_ConfigureOutputMode(tPwmOutput output, tPwmOutMode outMode, unsigned int device=0);
Code language: C++ (cpp)

void DoPwm_ConfigureDeadTime(tPwmOutput output, float deadTime, unsigned int device=0);
Code language: C++ (cpp)

void DoPwm_Activate(tPwmOutput output, unsigned int device=0);
Code language: C++ (cpp)

void DoPwm_Deactivate(tPwmOutput output, unsigned int device=0);
Code language: C++ (cpp)