Vacuum cleaner with Philips P89LPC901

Focus:

A low-cost MCU-controlled power supply design drives an 1800-W universal motor via a Triac for vacuum cleaner applications. This low component count design, which is based on the Philips P89LPC901 microcontroller, provides speed control and "robust control" plus the following features: a soft-start algorithm to reduce surge current at turn on, soft switching during changes in motor speed, and modification of the Triac fire pulse to suppress harmonics and meet the IEC61000-3-2 standard. Both hardware and software for the vacuum cleaner application are described. This design can also be extended to lamp and power tool applications.

What you’ll learn:

• How to build a low-cost microcontroller-based power supply for Triac-driven universal motors
• How to reduce start up current and harmonics when using a Triac to control the speed of a universal motor

Notes:

NXP Application Note AN10496

View the Source

Author & Publication:

no author listed, NXP, Vendor website, Aug 10 2006

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