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Brushless DC Motor Driver
Micro-Beam designs electronic brushless motor drives, including power electronics from few milli-watts up to 10kW. 
Our drivers are usually controlled by embeded software and developed using one of the following platforms:
  • DSP (Digital Signal Processor) embedded controllers from Texas (TMS320x280x, TMS320x240x family, TMS320x24x)
  • 8XC196MC, 8XC196MD, and 8XC196MH embedded microcontrollers combined with analog electronic circuits such as an MSP430 or a PIC.
Micro-Beam can also support many other platform that would depend on the system requirements and the needs of the customer.  For high volume production, cost considerations may suggest that integrated circuits be developed. Microbeam is skilled in motor drives using FPGA digital logic combined with analog electronic circuits that can be transered to an integrated circuit designer to provide the customer with a low IC count, low cost solution. The electronic drive can be delivered as a standalone PCB board or schematics to be integrated into the customer's design, and may be implemented to control up to 2 brushless motors with additional DC motors and/or stepper motors, as well as other logic needed for a complete system.

All manner of sensors to detect rotor parameters can be supported including but not limited to the following:

  • Hall Effect sensors
  • Digital Encoders.
  • Tachometers
  • Accelerometers

The embedded software can be designed to interface with the customer applications using RS232, USB, CAN, or SPI.  Futher, we can add custom interfaces consisting of display screens, touch screens, buttons, potentiometers, etc. to provide a complete stand-alone product.

Electric Motor Drive for motor speeds up to 80'000 rpm

In order to provide maximum motor drive efficiency Micro-Beam can provide a solution that controls the commutation of the motor, not only based on feedbacks from position sensors but by also including motor speed as a means to optimize the drive commutation angle.  For a low cost open loop solution, the electrical frequency of the supply voltage may be varied with the drive electronics.  In this scenerio the load angle will change as a function of the required torque.  As stated, this is a low cost solution but can be charecterized by poor efficiency compared to a close loop solution.