TRINAMICTMC389三相步进马达驱动方案
2012-05-04
作者:TRINAMIC 公司
TRINAMIC 公司的TMC389是三相步进马达驱动器,集成了低谐振的三相斩波器用于静态马达工作,能直接驱动三个外接N/P沟双MOSFET,马达电流高达8A和60V,多达171个微步距,采用基于自动负载调整马达电流的coolStep™s20,节能高达75%,主要用在精密三相步进马达驱动,医疗和光学应用,机器人和舞台照明.本文介绍了TMC389主要特性和优势,方框图和应用电路图,和高压大电流功率级电路图以及评估板TMC389–EVAL主要特性,应用框图,电路图和PCB元件布局图.
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产品亮点:
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应用:
Precision three phase stepper motor drives
Stage lighting
Medical applications
Optical applications
Robotics
Motor type
3 phase Stepper
图1.TMC389基本应用框图
图2.TMC389方框图和应用电路图
图2.TMC389采用外接栅极驱动器的高压大电流功率级电路图
图2.TMC429 StepDir控制器和SPI互连的示例图
TMC389评估板
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评估板亮点:
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)
图3.TMC389-EVAL评估板外形图
图4.TMC389-EVAL评估板应用框图
图5.TMC389-EVAL评估板元件布局图
图6.TMC389-EVAL评估板电路图(1)
图7.TMC389-EVAL评估板电路图(2)
图8.TMC389-EVAL评估板电路图(3)
图9.TMC389-EVAL评估板电路图(4)
详情请见:
http://www.trinamic.com/tmctechlibcd/integrated_circuits/TMC389/TMC389_datasheet.pdf
和
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