12 SYNTHESIS OF DC AND LOW-FREQUENCY SINUSOIDAL AC VOLTAGES FOR MOTOR DRIVES, UPS, AND POWER SYSTEMS APPLICATIONS
12.1 INTRODUCTION
The importance of power electronics applications for motor drives (AC and DC), UPS, and in power systems was described in Chapter 11. In many of these applications, the voltage-link structure of Figure 12.1 is used, where our emphasis will be to discuss how the load-side converter, with the DC voltage as input, synthesizes DC or low-frequency sinusoidal voltage outputs. Functionally, this converter operates as a linear amplifier, amplifying a control signal, DC in case of DC motor drives, and AC in case of AC motor drives, UPS, and other utility-related applications. The power flow through this converter should be reversible.
These converters consist of bidirectional switching power-poles, discussed in Chapter 3, two in the case of DC motor drives and single-phase AC applications, and three in the case of AC motor drives and three-phase applications. These are shown for DC and AC motor drives in Figures 12.2a and 12.2b, respectively.
FIGURE 12.2 Converters for DC and AC motor drives.
12.2 BIDIRECTIONAL SWITCHING POWER-POLE AS THE BUILDING BLOCK
In buck and boost DC-DC converters, discussed in Chapter 3, implementation ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
