Brushless RC

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• Sensorless BLDC Control with Back-EMF Filtering
  This application note describes a sensorless brushless DC (BLDC) motor control algorithm, implemented using the dsPIC(R) digital signal controller (DSC). The algorithm works by digitally filtering the back-Electromotive Force (back-EMF) on each phase of the motor and determining when to commutate...
• Application Example For MSK4310 Speed Controller
  The MSK4310 3 Phase DC Brushless Speed Controller hybrid is a complete closed loop velocity mode controller for driving a brushless motor. It requires no external velocity feedback devices for operation. Feedback is derived from the hall signal outputs from the motor. In velocity control, velocity...
• The Case for Electric Motors in Unmanned Vehicle (.pdf)
  not be practical because of their noise, weight and other application-specific issues. A patented high-efficiency brushless ring motor technology developed by ThinGap Corporation of Ventura, California promises to reduce energy consumption, allowing UAV's plenty of flight time once airborne. For UGV's and UUV's...
• Keeping cool
  Embedded microcontrollers manage dc fans for better cooling while dissipating less energy. The basic construction of a brushless-dc fan consists of a fan blade attached to a permanentmagnet rotor that surrounds the electromagnetic coils of the stator and associated control electronics. A typical...
• Linear Voltage Fan Speed Control Using Microchip's TC64X Family
  on or completely off. This efficient control methodology affords a very wide speed control range (typically 10% to 100% of full speed) because the fan motor is exposed to its full-rated voltage during the active portion of the PWM cycle. PWM control works with standard, two-wire Brushless DC (BDC) fans...
• Versatile Solutions for Micro-Dispensing
  in terms of control and operation. Such multiple-feature pumps can be overqualified for some applications which call for the simplicity of the NF 5 KTDCB-4 micro-diaphragm pump. This proven and tested fluid pump is fitted with a specially developed brushless motor and integrated control electronics, making...
• Electric Compressor Drive with Integrated Electronics for 42 V Automotive HVAC Systems (.pdf)
  including electric compressors. This paper deals primarily with the design. for HVAC. Electric compressors have advantages of low. aspects of the permanent magnet brushless dc motor,. refrigerant emissions, flexible packaging and an efficient. sensorless controller and integration of electronics...
• Why Servomotor Temperature Sensors Can Give Misleading Readings
  /Pulse-width_modulation UL 1446 - Systems of Insulating Materials - General: tinyurl.com/ygw4hu6. Consult the data sheet for a typical brushless-dc servomotor and one normally finds torque-speed curves for both a continuous or safe-operating area (SOAC) and for times of intermittent peak power. The correct...
• Implementing Temperature-Based Variable Fan Speed Control in NLX Power Supplies
  the fan down. FanC is a 0V to. 12V analog signal. The application circuit using the Microchip TC646 is. shown in Figure 2. Please refer to the TC646 datasheet. BRUSHLESS DC FAN BASICS. (DS21446) for details on pin descriptions. The overall. circuit can be broken down into five basic functional...
• Recognizing motor temperature sensor limitations
  , as we'll explore in this installment, even this approach has limitations. Motor ratings. Data sheets for typical brushless dc (BLDC) servomotors normally include continuous or safe-operating-area torque-speed curves plus intermittent peak curves. A safe-operating-area torque-speed curve defines...

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