AN1905 ST Microelectronics, Inc., AN1905 Datasheet

Manufacturer Part Number

AN1905

Description

St7mc Three-phase BLDC Motor Control Software Library

Manufacturer

ST Microelectronics, Inc.

Datasheet

1.AN1905.pdf (77 pages)

AN1905

APPLICATION NOTE

ST7MC THREE-PHASE BLDC MOTOR CONTROL

SOFTWARE LIBRARY

INTRODUCTION

This application note describes one of the software libraries available for the ST7MC MCU.

The ST7MC microcontroller comes with a dedicated motor control cell (MTC) and can drive

both permanent magnet DC/AC motors (PMDC/PMAC also called BLDC) and induction AC

motors. This application note describes the ST7MC software library required to control a

BLDC motor with a trapezoidal 6-step drive in sensor or sensorless mode, open or closed

loop, and in current or voltage mode. The control of a PMAC motor in Sinewave mode with

sensors is detailed in application note AN1947. The control of an AC induction motor in Sine-

wave mode is detailed in application note AN1904.

T h e l i b r a r y i s m a d e o f d i f f e r e n t C m o d u l e s , c o m p a t i b l e w i t h b o t h C O S M I C

(www.cosmic-software.com) and METROWERKS (www.metrowerks.com) toolchains. The

functions are grouped into several families, making this library an easy way to go through any

B L D C p r o j e c t d e v e l o p m e n t . U s e d i n c o n j u n c t i o n w i t h t h e S T 7 M C s t a r t e r k i t

(ST7MC-BLDC-KIT), evaluation can be achieved in a very short time, as the library eliminates

the need to study the MCU in detail.

A basic knowledge of C Language, PMDC motor drives and power inverter hardware is re-

quired.

AN1905

Rev 2

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