TPI SB-PWM – Helper block
SD208Table of Contents
The TPI SB-PWM helper block is a wrapper that simplifies the use of the SB-PWM block with the all-in-one programmable inverter (TPI8032 22kW). The TPI SB-PWM helper block allows the configuration of the TPI PWM outputs to be used with a custom modulator implemented in FPGA. Since the topology of the converter is fixed, the channel assignment and part of the modulators’ configuration are known beforehand.
The topology of the converter and the connection of the PWM channels are shown below. To prevent short-circuiting the DC bus, the upper and lower leg switches always use pseudo-complementary signals with a fixed dead-time of 124 ns. This value was chosen as low as possible to minimize the distortion introduced by the dead-time.
| PWM channel | PWM lane | Description |
| A | 0 | PWM High – Phase A (M0) |
| 1 | PWM Low – Phase A (M0) | |
| B | 2 | PWM High – Phase B (M1) |
| 3 | PWM Low – Phase B (M1) | |
| C | 4 | PWM High – Phase C (M2) |
| 5 | PWM Low – Phase C (M2) |
Simulink SB PWM helper block
Signal specification
The input A allows the activation (>0) or deactivation (<=0) of the PWM output(s).
Parameters
Device ID: selects which device to address when used in a multi-device configuration.Show ”activate” input: makes theAsignal input visible. If not checked, the TPI SB-PWM block is active by default.
PLECS SB PWM helper block
Signal specification
The input A allows the activation (>0) or deactivation (<=0) of the PWM output(s).
Parameters
Device IDselects which device to address when used in a multi-device configuration.PWM activationmakes theAsignal input visible if the option Use block input is selected. If not, the CB-PWM block is activated by default.
C++ functions
There are no C++ helper functions for the TPI. Please refer to the generic SB-PWM functions.
