Two level PWM generator#

The Two level PWM generator block is designed to control converters built with one elbow, with two elbows, with three elbows.

This block generates four signals: one carrier and three reference (for three phases, respectively), if the control method of the three-phase bridge converter is selected. If the control method of the converter with two elbows is selected, 3 signals are generated, of which two reference signals are in antiphase. Only one reference signal and one carrier signal are used when controlling a single-elbow converter. The reference signals are compared to the carrier signal during calculation to create control pulses for the controlled key switches of the bridge circuit. Depending on the selected type, 2 signals (1 elbow), 4 signals (2 elbows), 6 signals (3 elbows) will be generated at the output from the block.

with 3 arms — Generated signals for converter with 3 elbows#

with 2 arms — Generated signals for converter with 2 elbows#

with 1 arm — Generated signals for converter with 1 elbow#

1. Properties#

Property	Default value	Description	Units of measurement
Bridge converter type: 3 arm bridge; 2 arm bridge; 1 arm bridge	3 arm bridge	-	-
Carrier signal frequency	1000.0	-	Hz
Modulation coefficient	1.0	-	-
Reference signal frequency	50.0	-	Hz
Carrier signal bias	1.0	-	s
Pulse delay	0.0	-	s
Sampling type: Fundamental project frequency decimation; Sample time; Sampling frequency	Fundamental project frequency decimation	-	-
Decimation factor of project fundamental discretization frequency, available when selecting `Sampling type` - `Fundamental project frequency decimation`	1	-	-
Sample time, available when selecting `Sampling type` - `Sample time`	0.05	-	s
Sampling frequency, available when selecting `Sampling type` - `Sampling frequency`	20.0	-	Hz

2. Inputs and outputs#

Parameters	Input/Output	Description	Units of measurement	Port type
Signal	Output	-	-	Automation

In order to see the connection capabilities of the block, you need to go to page Description of block ports

3. Code generation#

Important

Block supports C source code generation

4. Examples of use#

Examples of using this block can be found in the following sections:

Tutorials;
How-to guides;
Description of Demo.

Tutorials

Library	Tutorial name
Electronics	Single machine power system powered by inverter