TPI SB-PWM - Helper block

Table 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)

PWM channels and lanes assignment

The TPI SV-PWM helper block is available starting from version 2024.2 of the SDK. The TPI8032 is required to use this driver.

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 the A signal input visible. If not checked, the TPI SB-PWM block is active by default.

Mapping between sb_pwm and PWM ports of the imperix IP in Vivado

PLECS 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.
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.