NXP MKV46F256VLL16

ARM® Cortex®-M4168 МГц256 КБ (256К x 8)

Overview

This application note describes the implementation of a sensorless control of four three-phase brushless DC (BLDC) motors using a single Freescale 32-bit Kinetis MKV46F256VLL16 device as Electronic Speed Controller (ESC) in a quadcopter application. The sensorless control software for a single motor and the BLDC control theory in general are described in Three-Phase BLDC Sensorless Motor Control Application (document DRM144). The hardware-dependent part of code of this general BLDC motor-control software is separated, which enables simple porting to new devices and easy scalability for multi-motor applications. This application note focuses on implementing this software on the MKV46F256VLL16 device and on the multi-motor aspects of BLDC sensorless control. It describes the modifications of a single-motor control software that enables running multiple BLDC motors on one device, bare-metal setup of all used peripherals, special features needed for the quadcopter drone application, and a basic overview of the MKV46F256 device.

Features

• One eFlexPWM with 4 sub-modules, providing 12 PWM outputs

• Two 8-channel FlexTimers (FTM0 and FTM3)

• One 2-channel FlexTimers (FTM1)

• Four Periodic interrupt timers (PIT)

• Two Programmable Delay Blocks (PDB)

• Quadrature Encoder/Decoder (ENC)

• Two 12-bit cyclic ADCs

• Four analog comparator (CMP) containing a 6-bit DAC and programmable reference input

• One 12-bit DAC

• 16-channel DMA controller

• Low-leakage wakeup unit

• SWD interface

• Advanced independent clocked watchdog

Applications

• Power Management

• Consumer Electronics

• Portable Devices

• Industrial