Hello, I'm working on a product where we need to drive a motor up to 75,000 RPM. Motor specs:
2A stall current
130mA no-load current
Back-emf constant: 0.39 (V/1000 rpm)
Internal phase resistance: 700mOhms
3 hall effect sensors, 120 degree phases
Motor Interface (8 wires):
Forward only, no reverse required
Also need a speed output for monitoring by an MCU for safety
Interface can be serial or hardware, it will be controlled by an MSP430
Latest Post: "BLE application development : Custom Hardware"
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Adam Sidelsky:
In reply to Derek9531:
Derek, This is about driving the motor, you need to overcome the back emf no matter how you sense the motor (hall sensors or not). in order to drive current into the motor, our voltage applied needs to be More than the back emf already generated by the spinning motor. To drive the motor faster, you need enough voltage as described above. Regards, -Adam
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.