The working principle of a DC motor is to connect the DC power supply to the armature winding through the brush, so that the current flows through the armature conductor.
There is a magnetic field inside the motor, and the current-carrying rotor (armature) conductor will be subject to the action of the electromagnetic force f f = Blia (rule left).
The electromagnetic force generated by all the conductors acts on the rotor, causing the rotor to rotate at n (rpm) to drive the mechanical load. A DC motor is a motor that converts DC electrical energy into mechanical energy.
It is widely used in electric dredger because of its good speed regulation performance. DC motors are divided into three categories: permanent magnet, separately excited and self-excited according to the excitation mode. Self-excitation ist then divided into three categories: shunt excitation, series excitation and compound excitation.
What is the working principle of DC motor?
The working principle of a DC generator is to take the alternating electromotive force induced in the armature coil and use the collector to cooperate with the switching action of the brush to push it out of the end of the broom. into an electromotive force varying over time. This is a direct current emf because the emf induced by brush A through the commutator is always the emf in the edge of the coil cutting the magnetic lines of force from pole N. Thus, the brush “A” always has a positive polarity, and similarly, brush “B” always has a negative polarity. Consequently, the end of the brush can induce a pulsed electromotive force of the same direction but of varying amplitude.THE.
The electromotive force induced in the coil is an alternating electromotive force, while the electromotive force at the brush terminal A B is a continuous electromotive force. ?
DC Generator
When the generator armature is driven by other machines to rotate counterclockwise at a uniform speed, the coil abcd moves to cut the magnetic field lines. When the coil rotates to the position shown in Figure 1.1.B, the right-hand rule can be used to determine that the direction of the induced electromotive force generated by the conductor in section ab is b → a; the force generated by the conductor in section cd is d → c, which is the same as slide 1. Brush A in contact is the positive electrode, and brush B in contact with slider 2 is the negative electrode . When the coil turns towards the neutral plane (the plane perpendicular to the lines of the chainmp magnetic), the induced electromotive force gradually decreases from its maximum value to zero. When the coil rotates across the neutral plane, the direction of the induced electromotive force generated by the conductor in section ab changes from a to b; the direction of the induced electromotive force generated by the conductor in section cd changes from c to d. At this time, brush A is in contact with sliding plate 2 of the commutator, and brush B is in contact with sliding plate 1. As the coil continues to rotate in the magnetic field, the electromotive force induced between the slides of collector 1 and 2 is an alternating electromotive force whose magnitude and direction changes with time. However, brushes A and B alternately come into contact with the commutator and the coil rotates. at the same time, bypass slides 1 and 2, so what is generated between brushes A and B is a puls DC emfed, and the output of A and B is DC power.The working principle of a DC motor is to connect the DC power supply to the armature winding through the brush, so that the current flows through the conductor armature.
There is a magnetic field inside the motor, and the current-carrying rotor (armature) conductor will be subject to the action of the electromagnetic force f f = Blia (rule left).
The electromagnetic force generated by all the conductors acts on the rotor, causing the rotor to rotate. The sub rotates at n (rpm) to slide the mechanical load. A DC motor is a motor that converts DC electrical energy into mechanical energy.
It is widely used in electric dredger because of its good speed regulation performance. DC motors are divided into three categories: permanent magnet, separately excitednt and self-excited depending on the mode of excitation. Self-excitation is further divided into three categories: shunt excitation, series excitation, and compound excitation.