IR2101 PDF

PD Rev. Gate drive supply range from 10 to 20V? Undervoltage lockout? Matched propagation delay for both channels? The output drivers feature a high pulse current buffer stage designed for minimum driver cross-conduction.

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Sensorless brushless DC motor control with Arduino circuit: Project circuit schematic is shown below. Note that all grounded terminals are connected together. In the circuit there are 2 pushbuttons, one is used to increase BLDC motor speed and the 2nd one is used to decrease it. The first three 33k connected to motor phases and the three 10k resistors are used as voltage dividers, because we can not supply the microcontroller with 12V, the other three 33k resistors generate the virtual natural point.

The virtual natural point is connected to Arduino pin 6. Each time the comparator compares the virtual point with the BEMF of one phase this is done in the software.

This minimizes the hardware needed and simplifies the circuit. The IR chips are used to control high side and low side mosfets of each phase. The figure below shows input and output timing diagram: The HIN lines of the three IR are connected to pins 11, 10 and 9 respectively for phase A, phase B and phase C.

Both Timer modules are configured to generate a PWM signal with a frequency of about 31KHz and a resolution of 8 bits. When the positive pin voltage is higher than the negative pin voltage, the output of the analog comparator ACO is set, and when the positive pin voltage is lower than the negative pin voltage, ACO is cleared. In this project I used the analog comparator interrupt and I used its interrupt on rising transition from low to high and interrupt on falling transition from high to low , this makes the zero crossing events interrupt the microcontroller.

To fully understand the code, read the ATmega datasheet!

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Bauteil: IR2101

Sensorless brushless DC motor control with Arduino circuit: Project circuit schematic is shown below. Note that all grounded terminals are connected together. In the circuit there are 2 pushbuttons, one is used to increase BLDC motor speed and the 2nd one is used to decrease it. The first three 33k connected to motor phases and the three 10k resistors are used as voltage dividers, because we can not supply the microcontroller with 12V, the other three 33k resistors generate the virtual natural point. The virtual natural point is connected to Arduino pin 6. Each time the comparator compares the virtual point with the BEMF of one phase this is done in the software. This minimizes the hardware needed and simplifies the circuit.

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Brushless DC motor controller using Arduino and IR2101

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