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LM621 brushless DC motor commutation circuit-three-phase full-wave drive circuit
Source: InternetPublisher:萌面大虾 Keywords: Brushless DC motor drive circuit PWM Updated: 2021/01/25
In the three-phase bipolar drive circuit
, external
PNP and NPN transistors form a three-phase inverter bridge, and the base drive is equipped with a current limiting resistor. The dead time here
is connected to the 4.8 design. The circuit is also equipped with over-current protection. When the current exceeds the predetermined
limit value, pin 17 acts to stop the motor. The speed control PWM signal
is input from the MAG toe.
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