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    Explanation introduction to the basic content of DC bridge motor and H-bridge drive circuit

     

    00:02 / 07:34 Normal 4 times speed 2 times speed 1.5 times 1.25 times normal 0.5 times normal load error Advantages and disadvantages of brush motor advantage 1, simple structure The brush motor mechanism is simple, easy to produce, easy to maintain, easy to control; DC motor also has a rapid, large start torque, from zero speed to rated speeds to provide rated torque performance. 2, run smoothly, start, good braking effect The brush motor is pressure-regulating speed, so starting and braking is stable, and the constant speed is also smooth. Brushless motor is usually digital frequency conversion control, first turn the AC into DC, DC changes to communication, controlling the speed through frequency change, so the brushless motor is not smooth when starting and braking, the vibration is large, only at the time of speed It will be smooth. 3, high control accuracy The brush motor is usually used with a gearbox, a decoder, making the motor's output power, higher control accuracy, and the control accuracy can reach 0.01 mm, almost allow the moving parts to stop in any way. All precision machines are controlled with DC motor. shortcoming A, there is friction between the brush and the commutator, resulting in a decrease in efficiency, increased noise, easy to heat, and the life of the brush is several times more shorter than the brush. b, maintenance, need to be changed. C, because the resistance is large, the efficiency is low, and the output power is small. D, the brush and commutator friction will cause fire, interference. Read more

     

     

     

     

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