DC motor forward and reverse control.
DC motor forward and reverse control: how to achieve forward and reverse rotation of DC motor
Firstly, understand the internal structure principle of DC motor coils, as shown in the figure below. The internal coils of DC motors are divided into excitation coils and armature coils. The power supply for the excitation coil and armature coil is separate and does not affect or interfere with each other.
So, there are two methods to change the direction of rotation of a DC motor: first, the excitation winding reverse connection method, which keeps the polarity of the armature winding terminal voltage unchanged and adjusts the direction of the motor by changing the polarity of the excitation winding terminal voltage. When the voltage polarity of both changes simultaneously, the direction of rotation of the motor remains unchanged.
2、 The armature reverse connection method maintains the polarity of the excitation winding terminal voltage unchanged, and reverses the motor by changing the polarity of the armature winding terminal voltage.
DC motor forward and reverse control 3
Precautions
He excited and parallel excited
DC motors generally use the armature reverse connection method to achieve forward and reverse rotation.
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