![]() For smaller motors, the X-NUCLEO-IHM16M1 should serve well. With above data, you can select the appropriate BLDC controller board. Apply the power only for a minute, otherwise, you could damage the motor… It will be easier to use a pen to mark the positions. ![]() Applied with above power, you can easily determine the pole-pair count by turning the shaft a full turn counting the ripples, you should feel the while turning. In our example, the power supply showed 0,36V / 0,3A = 1,2 Ohms, this gives, taking the circuit of three windings in star configuration (we have a simple series configuration of two windings) into account, 0,6 Ohm (1,2 Ohm / 2 = 0.6). Then connect it to two wires of the motor. Set your power supply to current limiting mode with approx 5% of the nominal current of the motor. We also measures some characteristics that have not been given by the specs, most important: The winding resistance. It looks like a stepper motor and has the following (known) performance characteristics: Then you can browse through the supported kits to do Motor Profiling.įor further hands-on example, I will use a „Generic BLDC Motor“ with very poor documentation and quite low performance. To find the right board, install the ST Motor Control SDK and open the Motor Profiler Tool. Why? Because the STM Motor Profiler Tool only runs with a few specific boards. When you go with STSPIN, you should think about getting the STEVAL-SPIN320x for prototyping your application, but additionally, you should always get the NUCLEO board with an appropriate BLDC driver hat. When you have your BLDC, it’s time to find the right controller for your application. For CNC applications, you can find HF spindles with 2200W and 30000 rpm. The available motors range from cheap no-name motors (~4000 rpm) to high performance high turn ratio (>60000 rpm) and from a few watts up to kilo-watts of power. They include mostly anything except the MOSFETs to drive a BLDC, including a ST32 Microcontroller, a DC/DC-Converter (with external passives), the MOSFET drivers,… Steps of designing a BLDC control circuit with STM32įirst step is to find one or some BLDC motors for your specific need. ![]() These packages are lead (Pb) free, with 100% matte-tin leadframe plating.ST offers quite a broad BLDC controller portfolio, but the most interesting to me seems the STSPIN family of controllers. The AMT49406 is available in a 24-contact 4 mm × 4 mm QFN with exposed thermal pad (suffix ES) and a 24-lead TSSOP with exposed thermal pad (suffix LP). Closed-loop speed control is optional, and RPM-to-clock frequency ratio is programmable.Ī simple I2C interface is provided for setting motor-rated voltage, rated current, rated speed, resistance, and startup profiles. Motor speed is controlled through analog, PWM, or CLOCK input. The device optimizes the motor startup performance in a stationary condition, a windmill condition, and even in a reverse windmill condition. The AMT49406 is ideal for ceiling fans, pedestal fans, bathroom exhaust fans and home appliance fans and pumps.Ī field-oriented control (FOC) algorithm is fully integrated to achieve the best efficiency and acoustic noise performance. The AMT49406 is a 3-phase, sensorless, brushless DC (BLDC) motor driver (gate driver) which can operate from 5.5 to 50 V-Allegro’s first QuietMotion solution. ![]()
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