Boost Converter Optimizes Motor Performance In Battery-Powered Applications

Focus:

Motor speed is proportional to the voltage applied to the motor, so as a system’s battery voltage decreases over time, the speed of the motor inherently decreases. One way to combat decreasing battery voltage is to use a dc-dc boost converter. This article presents a solution based on the TPS61175 boost converter IC. The example system discussed here consists of a 12-V, 1-W to 3-W motor powered off of 12-V system power, which is derived from 8 AA batteries. Details of boost converter circuit operation and selection of key supporting components are explained, experimental results are presented, and tradeoffs of using a boost converter are noted.

What you’ll learn:

• How to maintain constant motor speed in battery-based applications by using a boost converter
• How to boost battery voltage in low-power (1 W to 3 W) motor applications

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Author & Publication:

Jared Becker, Texas Instruments, Detroit, Mich. and Donald Schelle, Texas Instruments, Cambridge, Ont., Canada , How2Power Today, Aug 16 2018

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