Description
The Stellaris® Brushed DC Motor Control Module with CAN (RDK-BDC24) provides variable speed control for both 12 V and 24 V brushed DC motors at up to 40 A continuous current, and includes a new RS232-based serial control input that also functions as a serial-to-CAN bridge. The MDL-BDC24 includes a rich set of sensor interfaces, connectivity, and control options, including analog and quadrature encoder interfaces, high performance Controller Area Network (CAN) interfaces, and an RS232 port. The module uses highly optimized software and a powerful 32-bit Stellaris® LM3S2616 microcontroller to implement open-loop voltage control as well as closed-loop control of speed, position, or motor current. The H-bridge on the MDL-BDC24 is run at high-frequency through the MCU's integrated PWM interface and that enables DC motors to run smoothly and quietly over a wide speed range.
The MDL-BDC24 design also incorporates several high-quality analog components from Texas Instruments, including the SN65HVD1050 CAN Transceiver, MAX3221 RS232 Line Driver/Receiver, TPS54040 Swift DC/DC Converter, TPS73633 Voltage Regulator, and INA193 Current Shunt Monitor. The MDL-BDC24 is positioned into a wide variety of consumer and industrial applications, including factory automation devices and systems, mobile robots, household appliances, pumping and ventilation systems, and electric wheelchairs and mobility devices.
Features
The RDK-BDC24 is a Stellaris reference design for speed control of 12 V and 24 V brushed DC motors at up to 40 A continuous current. Features include high-performance CAN and RS232 networking as well as a rich set of control options and sensor interfaces, such as analog and quadrature encoder interfaces.
High-frequency PWM enables the DC motor to run smoothly and quietly over a wide speed range. The MDL-BDC24 uses highly optimized software and a powerful 32-bit Stellaris LM3S2616 microcontroller to implement open-loop speed control as well as closed-loop control of speed, position, or motor current.
The Reference Design Kit (RDK-BDC24) contains an MDL-BDC24 motor control module as well as additional hardware and software for evaluating RS232 communication. After evaluating the RDK-BDC24, users may choose to either customize parts of the hardware and software design or use the MDL-BDC24 without modification.
The MDL-BDC24 ships as a ready-to-run, yet customizable, module with the following features:
- Quiet control of brushed DC motors with 15 kHz PWM frequency
- Three options for open-loop voltage control
- Industry-standard R-C servo type (PWM) interface
- Controller Area Network (CAN) interface
- RS232 serial interface
- Controller Area Network (CAN) interface or RS232 serial interface for closed-loop, speed, position, or current control
- CAN communication
- Full configurability of module options
- Real-time monitoring of current, voltage, speed, and other parameters
- Load firmware over RS232/CAN
- RS232 serial communication
- Bridges an RS232-enabled device to the CAN
- Directly interfaces to a PC serial port or National Instruments cRIO
- Limit switch inputs for forward and reverse directions
- Firmware features
- Full configurability of closed-loop module parameters
- Real-time monitoring of sensor data including motor current, encoder position or speed, and limit switch state
- Status LED indicates run, direction, and fault conditions
- Motor brake/coast selector
- Quadrature encoder input (QEI) and analog input
- Color-coded screw terminals for all power wiring
Kit Contents
In addition to being offered as a stand-alone, ready-for-production module, the Stellaris® MDL-BDC24 is also offered as a complete open-tool reference design kit (RDK-BDC24). The RDK ships with everything needed to quickly evaluate the MDL-BDC24 for your specific application including the following:
- MDL-BDC24 motor control module
- Mabuchi RS-555PH-3255 Brushed DC Motor (rated 5000 RPM, 12 V, 3 A)
- Universal input wall power supply
- DB9 to RJ12 Serial-to-CAN adapter
- 2 6P-6C modular cables (1 ft and 7 ft)
- CAN plug-in 120-Ù terminator
- Adapter cable for ARM JTAG/SWD fine-pitch header
- Reference design kit CD with complete documentation, LM Flash Programmer utility for firmware updates, BDC-COMM GUI for monitor and control, and complete source code, schematics, and PCB Gerber files
For the latest versions of Stellaris software, firmware and kit CDs, click on this link:
