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三相BLDC和PMSM设计的低压马达控制方案

作者:时间:2010-06-02来源:网络收藏
/采用MC9S08AC16系列器件.这种8位MCU采用增强的HCS08内核,具有低成本和高性能,系列有各种模块,存储器容量,存储器类型和封装形式.MC9S08AC16和MC9S08AC8用于消费类电子和工业,MC9S08AW16A和MC9S08AW8A用于汽车电子.本文介绍了MC9S08AC16系列主要特性,方框图,以及主要特性,详细电路图以及材料清单(BOM).

3-Phase / Low- Voltage Motor Control Drive

The MC9S08AC16 Series devices are members of the low-cost, high-performance HCS08 Family of 8-bit microcontroller units (MCUs). All MCUs in the family use the enhanced HCS08 core and are available with a variety of modules, memory sizes, memory types, and package types.

MC9S08AC16 Series Devices

Consumer Industrial

― MC9S08AC16

MC9S08AC8

Automotive

― MC9S08AW16A

― MC9S08AW8A

8-Bit HCS08 Central Processor Unit (CPU)

40-MHz HCS08 CPU (central processor unit)

20-MHz internal bus frequency

HC08 instruction set with added BGND instruction

Background debugging system

Breakpoint capability to allow single breakpoint setting during in-circuit debugging (plus two more breakpoints in on-chip debug module)

Debug module containing two comparators and nine trigger modes. Eight deep FIFO for storing change-of-flow addresses and event-only data. Debug module supports both tag and force breakpoints.

Support for up to 32 interrupt/reset sources

Memory Options

Up to 16 KB of on-chip in-circuit programmable FLASH memory with block protection and security options

Up to 1 KB of on-chip RAM

Clock Source Options

Clock source options include crystal, resonator, external clock, or internally generated clock with precision NVM trimming

System Protection

Optional computer operating properly (COP) reset with option to run from independent internal clock source or bus clock

Low-voltage detection with reset or interrupt

Illegal opcode detection with reset

Illegal address detection with reset

Power-Saving Modes

Wait plus two stops

Peripherals

ADC ― 8-channel, 10-bit analog-to-digital converter with automatic compare function

SCI ― Two serial communications interface modules with optional 13-bit break

SPI ― Serial peripheral interface module

IIC ― Inter-integrated circuit bus module to operate at up to 100 kbps with maximum bus loading; capable of higher baud rates with reduced loading

Timers ― Three 16-bit timer/pulse-width modulator (TPM) modules ― Two 2-channel and one 4-channel; each has selectable input capture, output compare, and edge-aligned PWM capability on each channel. Each timer module may be configured for buffered,centered PWM (CPWM) on all channels

KBI ― 7-pin keyboard interrupt module

Input/Output

Up to 38 general-purpose input/output (I/O) pins

Software selectable pullups on ports when used as inputs

Software selectable slew rate control on ports when used as outputs

Software selectable drive strength on ports when used as outputs

Master reset pin and power-on reset (POR)

Internal pullup on RESET, IRQ, and BKGD/MS pins to reduce customer system cost

Package Options

48-pin quad flat no-lead package (QFN)

44-pin low-profile quad flat package (LQFP)

42-pin shrink dual-in-line package (SDIP)

32-pin low-profile quad flat package (LQFP)

图1.MC9S08AC16系列方框图

图2.MC9S08AC16系统时钟分布方框图

BLDC/PMSM驱动

Freescale’s 3-Phase BLDC/PMSM Low-Voltage Motor Control Drive is a 3-phase power stage that will operate with DC input voltages in the range 12C24 V, 4 A. Together with the daughter boards, it provides a software-development platform that allows algorithms to be written and tested without designing and building any hardware. It supports a variety of algorithms for PMSM and brushless DC (BLDC) motors.

The 3-Phase BLDC/PMSM Low-Voltage Motor Control Drive contains reverse-polarity protection circuitry, MOSFET-gate-drive circuits, analog-signal conditioning, low-voltage power supplies and bridge MOSFETs. The power devices do not need to be mounted on a heatsink.

There are controller daughter boards available with these controllers:

MC56F8013/23 ― LQFP32

MC9S08AC16 ― LQFP44

MCF51AC256 ― LQFP80

MC9S08MP16 ― LQFP48

MC56F8006 ― LQFP32

板主要特性:

Power supply voltage input 12C24 V DC, extended up to 50 V (see chapter 2.2 Electrical Characteristics for details)

Output current 4 A

Power supply reverse polarity protection circuitry

3-phase bridge inverter (6 MOSFET’s)

3-phase MOSFET gate driver with overcurrent and undervoltage protection

3-phase and DC-bus-current-sensing shunts

DC-bus voltage sensing

3-phase back-EMF voltage-sensing circuitry

Low-voltage on-board power supplies

Encoder/hall sensor sensing circuitry

Motor power and signal connectors

2 connectors for daughter board connection

CAN physical layer

USB interface

User LED, power-on LED, 6 PWM LED diodes, and SCI activity LED diodes

Up, down, toggle switches

Reset push-button


图3.三相BLDC/PMSM低压马达控制驱动板外形图

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