Shenzhen Go-Gold Motor Co., Ltd.
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Description
DC motor voltage 36V factory Customised Hot sales electric motor power 60W used for Intelligent furniture
The rotor stacks have number of teeth equals to stator teeth number but they are aligned.
Essential details
| Voltage(V): | 36V | Torque(Nm): | 2Nm |
| Input power(W): | 60W | Current(A): | 2A |
Detailed Information
As a matter of fact, not all stepper motors have the same internal structure (or construction), as there are different rotor and stator configurations.
Rotor For a stepper motor, there are basically three types of rotors: Permanent magnet rotor: The rotor is a permanent magnet that aligns with the magnetic field generated by the stator circuit. This solution guarantees a good torque and also a detent torque. This means the motor will resist, even if not very strongly, to a change of position regardless of whether a coil is energized.
The drawbacks of this solution is that it has a lower speed and a lower resolution compared to the other types. The rotor is made of an iron core, and has a specific shape that allows it to align with the magnetic field (see Figure 1 and Figure 2). With this solution it is easier to reach a higher speed and resolution, but the torque it develops is often lower and it has no detent torque. Hybrid rotor: This kind of rotor has a specific construction, and is a hybrid between permanent magnet and variable reluctance versions. The rotor has two caps with alternating teeth, and is magnetized axially.
This configuration allows the motor to have the advantages of both the permanent magnet and variable reluctance versions, specifically high resolution, speed, and torque.
This higher performance requires a more complex construction, and therefore a higher cost. Figure 3 shows a simplified example of the structure of this motor. When coil A is energized, a tooth of the N-magnetized cap aligns with the S-magnetized tooth of the stator. At the same time, due to the rotor structure, the S-magnetized tooth aligns with the N-magnetized tooth of the stator. Real motors have a more complex structure, with a higher number of teeth than the one shown in the picture, though the working principle of the stepper motor is the same. The high number of teeth allows the motor to achieve a small step size, down to 0.9°.
Hybrid Stepper Motor Stator The stator is the part of the motor responsible for creating the magnetic field with which the rotor is going to align.
The main characteristics of the stator circuit include its number of phases and pole pairs, as well as the wire configuration. The number of phases is the number of independent coils, while the number of pole pairs indicates how main pairs of teeth are occupied by each phase. Two-phase stepper motors are the most commonly used, while three-phase and five-phase motors are less common (see Figure 5 and Figure 6). Figure 5: Two-Phase Stator Winding (Left), Three-Phase Stator Winding (Right) wo-Phase, Single-Pole Pair Stator (Left) and Two-Phase, Dipole Pair Stator (Right). The Letters Show the Magnetic Field Generated when Positive Voltage is Applied between A+ and A-.
