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TRINAMICTMC389三相步進馬達驅動方案

2012-05-04
作者:TRINAMIC 公司

TRINAMIC 公司的TMC389是三相步進馬達驅動器,集成了低諧振的三相斬波器用于靜態馬達工作,能直接驅動三個外接N/P溝雙MOSFET,馬達電流高達8A和60V,多達171個微步距,采用基于自動負載調整馬達電流的coolStep™s20,節能高達75%,主要用在精密三相步進馬達驅動,醫療和光學應用,機器人和舞臺照明.本文介紹了TMC389主要特性和優勢,方框圖和應用電路圖,和高壓大電流功率級電路圖以及評估板TMC389–EVAL主要特性,應用框圖,電路圖和PCB元件布局圖.

The TMC389 is an energy efficient three phase stepper motor driver for high resolution microstepping applications. It integrates a low resonance three phase chopper for quiet motor operation. Its step and direction interface allows simple use. An SPI™ management interface allows for parameterization and diagnostics. The TMC389 directly drives 3 external N/P channel dual MOSFETs for motor currents up to 8A and up to 60V. Protection and diagnostic features further reduce system cost and increase reliability.

TMC389產品亮點:

? Up to 171 microsteps (256 sine wave steps) using step/direction interface or 20 Bit SPI™interface

? High precision sensorless motor load measurement stallGuard2

? Energy efficiency and coolness by automatic load dependant motor current regulation coolStep™s20 : Save up to 75% of energy!

? Internal microstep extrapolation allows 256 wave step smoothness with low frequency step input

? Dual edge step option allows half step frequency requirement, e.g. for opto-couplers

? Up to 8A Motor current using external N&P channel MOSFET pairs

? Synchronous rectification reduces transistor heating

? 9V to 60V operating voltage (peak)

? 3.3V or 5V interface

? QFN32 package for extremely small solution with superior thermal performance

? EMV optimized current controlled gate drivers – up to 45mA gate current

? Overcurrent, short to GND and overtemperature protection and diagnostics integrated

TMC389應用:

? Precision three phase stepper motor drives

? Stage lighting

? Medical applications

? Optical applications

? Robotics

Motor type

? 3 phase Stepper

圖1.TMC389基本應用框圖

圖2.TMC389方框圖和應用電路圖

圖2.TMC389采用外接柵極驅動器的高壓大電流功率級電路圖

圖2.TMC429 StepDir控制器和SPI互連的示例圖

TMC389評估板

The TMC389 evaluation board features a TMC389 with external power MOSFETs plus a microcontroller, which allows interfacing to a PC for visualization and control of all parameters. The motor can be operated via the step and direction interface, using either an external source, or using the integrated microcontroller as a step pulse generator.

The TMC389-EVAL allows you to explore all functions of the TMC389. The evaluation board comes with a PC software which gives you access to every function of the driver. It comes along with a Step&Direction interface, a RS232 and a USB port. The TMC389-Eval is a complete "plug and play" solution, additionally only a motor, a PC and a power supply are required!

TMC389評估板亮點:

? Evaluate all features of the TMC389

? Use stallGuard2™ with your motor

? Use coolStep™ with your motor

? Control all parameters from a PC

? Motor current can be set to up 6A depending on sense resistor selection.

? Supply voltage up to 40V (MOSFETs can be exchanged against 60V 2A types)
? Access all pins of the TMC389

Motor type

? 3 phase Stepper

TMC389-EVAL contains

TMC389-Evaluation Board

USB cable for connection to PC

software for Windows (downloadable)

documentation, board and circuit description and all datasheets (downloadable)


圖3.TMC389-EVAL評估板外形圖

圖4.TMC389-EVAL評估板應用框圖

圖5.TMC389-EVAL評估板元件布局圖


圖6.TMC389-EVAL評估板電路圖(1)

圖7.TMC389-EVAL評估板電路圖(2)

圖8.TMC389-EVAL評估板電路圖(3)

圖9.TMC389-EVAL評估板電路圖(4)
詳情請見:
http://www.trinamic.com/tmctechlibcd/integrated_circuits/TMC389/TMC389_datasheet.pdf

http://www.trinamic.com/tmctechlibcd/integrated_circuits/TMC389/TMC389-EVAL/TMC389-EVAL_manual.pdf
以及
http://www.trinamic.com/tmctechlibcd/integrated_circuits/TMC389/TMC389-EVAL/TMC389-EVAL_V10_schematic.pdf



 



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