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E-Bike

E-Bike Solutions from Texas Instruments

Block Diagram


For position and current if necessary AC/DC Converter with Green Mode Controller Backlight Battery Charger Battery Protection Clock The TMS320F28015 DSP is a highly integrated, high-performance solution for demanding control applications. For a more economical, straight-forward system, we suggest the MSP430 micro controllers. Core & I/O Power Digital Isolators Digital Isolators Digital Isolators Digital Isolators Digital Isolators Digital Isolators Battery Fuel Gauges Gate Drivers Input Amplifier Input Amplifier Relay Drivers Copmparators and shunt signal conditioning if necessary Copmparators and shunt signal conditioning if necessary System Power Temperature Sensor Temperature Sensor

Design Considerations

Electric bikes are becoming an increasingly intriguing option for commuters who live relatively close to work or for those looking for an alternative to the more expensive motorized options.  As battery and motor technology forges ahead, the speed and range of E-bikes are surging with it. The E-bike can use a variety of components based on the desired cost and complexity of the design.

The core subsystems include:

Controller:
Typically includes detection, A/D conversion, and output comparison components.  For a low-end system, the ultra-low power microcontroller is available while the C2000 digital signal processor can be used for a complex system with more features.

Electric motor:
Typically either brush or brushless DC motors are used for the E-bike.  The brushless, although more reliable and efficient, can increase the bike weight.  

Battery:
A variety of battery types are used from lead-acid to lithium.  The lead-acid battery is commonly used for its low-cost but is much larger and heavier as well as less “green” than the lithium battery.   

Power management:
Provides power to run functional blocks and oversees battery activity.  For a low-end E-bike, the host controller with comparators and discretes can be used to manage a lead-acid battery.  More complex E-bikes utilize specific ICs which offer cell protection, monitoring and fuel gauging to provide safety and critical information about the lithium battery to the user.

Application Notes

  • Flash Programming Solutions for the TMS320F28xxx DSCs (spraal3.htm, 8 KB)
    19 Aug 2008 Abstract
  • Design Considerations for the UCC28600 (Rev. B) (slua399b.htm, 8 KB)
    01 May 2008 Abstract
  • VCXO Application Guideline for CDCE(L)9xx Family (scaa085.htm, 8 KB)
    06 Jun 2007 Abstract
  • Flyback Transformer Design for the UCC28600 (slua418.htm, 8 KB)
    13 Feb 2007 Abstract
    

Selection and Solution Guides

Selection Guides

  • Automotive Selection Guide (Rev. D) (sgzb002d.pdf, 529 KB)
    31 Jan 2008 Download
  • Amplifier and Data Converter Selection Guide (Rev. B) (slyb115b.pdf, 3.87 MB)
    01 Jun 2007 Download
  • Clocks and Timing Selection Guide (Rev. A) (slyb104a.pdf, 776 KB)
    23 Apr 2007 Download

Tools and Software

Name Part # Company Software/Tool Type
Code Composer Essentials v3 Core Edition - Free 16KB IDE MSP-CCE430 Texas Instruments Compilers/Assemblers/Linkers

Product Bulletin & White Papers

Product Bulletin

  • OMAP35x For Medical Apps (sprt491.pdf, 208 KB)
    25 Jul 2008 Download

White Papers

  • Enabling Greener Embedded Control Systems with Floating-point DSCs - White Paper (spry113.pdf, 73 KB)
    18 Mar 2008 Download

News Releases & Authored Articles

News Releases

Date Headline
06 Oct 2008 TI smart battery technology protects and manages multi-cell lithium battery systems
08 Sep 2008 Texas Instruments Piccolo™ 32-bit microcontrollers bring real-time control for greater energy efficiency to cost-sensitive applications
10 Jul 2007 TI Introduces Industry's Most Flexible 3.3-V, 2.5-V and 1.8-V Clock Generator Family

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