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Found 3 results

  1. I've just started a project "Sensorless BLDC Motor Controller: Modular System" on Kickstarter. It is open source hardware/firmware project. https://www.kickstarter.com/projects/946939931/sensorless-bldc-motor-controller-modular-system Event driven finite state machines (FSM) approach was used for this sensorless BLDC motor controller firmware. The programming language is C and there is no operating system. It was implemented by myself from scratch based on the well known motor control, other algorithms and the firmware is a totally open source product. What the implemented firmware can do? Uses a 31.25 kHz symmetric PWM scheme to better detect BEMF zero crossing 12-bit ADC configured as a window comparator makes more error prone zero crossing detection, especially on a start Initial Position Detection (IPD) algorithm was implemented based on Variable Inductance Sensing Method A rotor revolving direction can be changed any time on a fly, that can be used for "reverse braking" Safety stop when a motor stalled Motor speed control (start, stop, up, down, duty cycle %) and obtaining a real time telemetric data (speed, voltage current) using serial UART interface configured for 460800 bps Motor speed control using standard 1...2 ms PPM of remote control (RC) devices I hope it can help an engineering community. Thanks.
  2. Tribes

    Sensorless BLDC motor control

    Hi there, my current project is to build a controller for a sensorless BLDC motor using a MSP430G2553. I want to realize trapezoidal control with Back-EMF/zero-crossing detection. I plan to detect zero-crossing with the Comparator(CA2/3/4 vs. CA1) and generate PWM using Timer1. Timer0 will be used for things like 30 BLMC_.zip
  3. Hello, I wrote a very simple PWM Code for my Brushless DC Motor (incl. ESC) and it works very good (I don't use any Potentiometers.): int motorPin = PF_1; void setup() { pinMode(motorPin, OUTPUT); } void loop() { analogWrite(motorPin, HIGH); delayMicroseconds(1000); analogWrite(motorPin, LOW); delayMicroseconds(19000); } I need 50Hz (1/50=20us). The Motor breaks when the first delay is "1000us" and the second is "19000us". The Motor arrives highspeed when the first delay is "2000us" and the second is "18000us" So my dutycycle should be between 5 - 10% What i need is this PWM Signal without any delays. Is there any way to create a PWM without delays? Thank you very much. greetings, Yaman
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