B O A R D D A T A S H E E T Brushless DC (BLDC) Motor Control Board with Ethernet and CAN Ordering Information Order No. Description MDL-BLDC Brushless DC Motor Control Board Only RDK-BLDC Stellaris® Brushless DC (BLDC) Motor Control Reference Design Kit (includes MDL-BLDC board) Contents General Description........................................ 1 Overview .................................................................... 2 General Features ....................................................... 2 Communications Features ......................................... 2 Board Dimensions ..................................................... 2 Operational Specifications ............................ 3 Maximum Ratings ...................................................... 4 Wiring......................................................................... 4 Configurable Parameters ............................... 5 Additional Information . . . . . . . . . . . . . . . . . 5 Figure 1. BLDC Motor Control Board General Description The brushless DC (BLDC) motor control board is a four-quadrant motor control board for three-phase BLDC motors rated at up to 36 V (see Figure 1). Key features include complete CAN and Ethernet communications interfaces, the powerful, 32-bit Stellaris® LM3S8971 microcontroller, and sophisticated software to optimally control a range of motors in diverse applications. 10/100 Ethernet connects the BLDC module to an array of networks—from dedicated industrial networks to the internet. The standard BLDC module includes the Stellaris motor control and configuration (MCC) protocol. This protocol can be replaced with any industry-standard protocol. First-time users should purchase a complete BLDC reference design kit (RDK) which includes the control board, cables, configuration software (GUI), a documentation CD, and a sample motor. After evaluating the BLDC module, users may choose to either customize the design or use the BLDC board without modification. Refer to the RDK-BLDC User's Brushless DC (BLDC) Motor Control Board with Ethernet and CAN 1 B O A R D D A T A S H E E T Guide (available for download from www.luminarymicro.com) for complete technical details on using and customizing the motor control board. Overview The MDL-BLDC control board provides the following features: Controls three-phase BLDC motors up to 36 V 500 W 10/100 Ethernet and CAN interfaces Four-quadrant operation Hall Effect, Quadrature, and Sensorless operation modes Extensive configuration options using Windows graphical user interface (GUI) Easy to customize—full source code and design files available General Features On-board braking circuit Incremental quadrature encoder input Analog and digital control inputs Test mode push-button Status LEDs indicate Power, Run, and Fault conditions Optional power-managed fan for forced-air cooling Screw terminals for all power and signal wiring Communications Features 10/100 Ethernet – Auto MDI/MDIX – Traffic and link indicator LEDs – MCC protocol supports multiple boards on the same network CAN bus – Support up to 1 Mbps – On-board selectable CAN terminator Serial port – Header provides TXD and RXD signals – CMOS signal levels – MCC communication protocol – 115.2 kbaud, 8 bit, no parity, 1 stop bit Board Dimensions Figure 2 on page 3 shows the board dimensions for the MDL-BLDC motor control board. Brushless DC (BLDC) Motor Control Board with Ethernet and CAN 2 B O A R D D A T A S H E E T Figure 2. MDL-BLDC Board Dimensions 5.30" Ø 0.125" 1.575" 2.70" 3.00" 1.575 " 0.70" 3.50" Operational Specifications Table 1 shows the operating parameters for the MDL-BLDC motor control board. Table 1. MDL-BLDC Operating Specifications Parameter Name Min Nom Max Unit Power Supply 12 – 36 V Switching Frequency 8 16 20 kHz Speed Rangea 1 – 60,000 RPM Continuous Output Currentb – – 14 A Continuous Output Currentc – – 10 A Operating Temperature Range 0 – 70 °C -25 – 85 °C Supply Current – Motor Stoppedd – 13 – mA Analog Input Range 0 – 5 V Digital Input Low-Level Input Voltage -0.3 – 1.3 V Digital Input High-Level Input Voltage 2.0 – 5.0 V Digital Input Pull-Up Resistor – 6.8 – kΩ Hall Sensor Supply (at 5.0 V) – – 30 mA Brake Resistor Continuous Power – – 10 W Brake Resistor Peak Power (5 s) – – 50 W Storage Temperature Range a. Actual range depends on motor type Brushless DC (BLDC) Motor Control Board with Ethernet and CAN 3 B O A R D D A T A S H E E T b. At 25° C ambient c. At 40° C ambient d. With 24 V supply Maximum Ratings The maximum ratings are the limits to which the device can be subjected without causing permanent damage (see Table 2). Table 2. MDL-BLDC Maximum Ratings Parameter Name Min Nom Max Unit DC Bus Voltage Range 10 – 60 V Peak Output Current for 2 seconds – – 30 A Continuous Output Power – – 500 W -0.3 – 5.5 V Control Signal Input Rangea a. Applies to Hall Effect sensor, analog, and digital inputs Wiring The MDL-BLDC motor control board is controlled by one of the three communication interfaces, or by a simple analog control voltage. Figure 3 shows power, motor, and peripheral connections to the main terminal block. Connections to the Hall sensors, analog speed control potentiometer, and quadrature/incremental encoder are all optional. Brushless DC (BLDC) Motor Control Board with Ethernet and CAN 4 B O A R D D A T A S H E E T Figure 3. Terminal Wiring Diagram 12-36V GND DC Power Supply Phase A (u) Phase B (v) Motor Phase C (w) GND +5V Hall A Hall B Hall C GND Analog Input Index PhB PhA Quadrature Encoder (opt) Configurable Parameters The follow list shows just a few of the parameters that can be configured by the GUI or directly using the MCC protocol: Motor poles Speed range Motor current and voltage Acceleration and deceleration rate Control method: Hall effect sensors or back-EMF Trapezoidal (BLDC) or sinusoidal (PMAC, BLDC) control Control-loop coefficients Additional Information The following documents are available for download at www.luminarymicro.com: RDK-BLDC User’s Manual, Publication Number RDK-BLDC-UM RDK-BLDC Quickstart Brushless DC (BLDC) Motor Control Board with Ethernet and CAN 5 Important Notice Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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All rights reserved. Stellaris and StellarisWare are registered trademarks of Texas Instruments. ARM and Thumb are registered trademarks, and Cortex is a trademark of ARM Limited. Other names and brands may be claimed as the property of others. RDK-BLDC-DS-05 August 26, 2009