Considerações Saber Sobre dc motor speed controller board module (pwm 48v 20a)
Considerações Saber Sobre dc motor speed controller board module (pwm 48v 20a)
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SHOPEE COMPRAR AGORA
Test the circuit. The DC motor should now be spinning if all components are securely connected. Rotating or adjusting the potentiometer should change the speed of the motor with either limit being the motors fastest speed, and the slowest speed the potentiometer can provide. If the motor is not running, check all the connections to make sure the circuit is securely connected. If the motor still doesn't run, check that the battery is not dead by connecting it directly to the motor and replace or recharge if dead.
L293D is an H-BRIDGE IC designed for driving low power DC motors and is shown in figure. This IC consists two h-bridges and so it can drive two DC motors. So this IC can be used to drive robot's motors from the signals of microcontroller.
Initialize the BUTTONs & DC_MOTORs in the main application, start the DC Motors, read the analog potentiometers with ADC. And use that reading to control the 2 motor speeds in the main loop of the system. Read the buttons and use that signal to flip the direction of the 2 motors rotation. Repeat!
But the current through each motor is half of the total current and so torque produced is lesser than series-connected motors. It offers great flexibility, reliable operation and power wastage is reduced.
If you need a motor with a unidirectional rotation, you can build a BDC motor controller using a simpler circuit with only one open/close switch.
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The speed of a DC motor is directly proportional to the supply voltage. A simple way to control the speed of a DC motor is to regulate the supply voltage with pulse width modulation (PWM).
Three or more wires are needed. Insulated wires work best as they prevent wires from crossing and the battery from short circuiting.
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Rotation is maintained by continually switching the flux so that the permanent magnet is constantly chasing the rotating magnetic field induced by the coils.
If you are also looking to control the direction of the motor in addition to controlling the speed, you can check out our alternative project that uses the L293D to control the DC Motor.
More precise sensors—such as resolvers and optical encoders—are more appropriate with motors that use vector control (see below), where flux is more finely controlled.
So far, however, we have not looked at another important feature of these motors: their positional sensors. Because BLDC motor control must be coordinated with the rotor (magnet) position, these motors typically also include sensors to detect this position.
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