Felm Motor motor Germany Felm Motor model Felm Motor price

Felm Motor motor refers to a low-power single-phase asynchronous motor powered by a single-phase AC power supply (AC220V). This type of motor typically has two-phase windings on the stator, and the rotor is of the ordinary squirrel-cage type. Different distributions of the two-phase windings on the stator and different power supply conditions can produce different starting and operating characteristics.

Felm Motor motor applications

Static indicator terminology for motors: Number of phases: the number of pairs of excitation coils that generate magnetic fields with different pole pairs N and S. Commonly expressed in m. Beat count: the number of pulses or conducting states required to complete one periodic change of the magnetic field, expressed in n, or refers to the number of pulses required for the motor to rotate through one tooth pitch angle. Taking a four-phase motor as an example, the four-phase four-beat operation mode is AB-BC-CD-DA-AB, and the four-phase eight-beat operation mode is A-AB-B-BC-C-CD-D-DA-A. Step angle: the angular displacement of the motor rotor corresponding to one pulse signal, expressed as θ. θ=360 degrees (rotor teeth J * operating beats). Taking conventional two-phase and four-phase motors with 50 rotor teeth as an example. In four-beat operation, the step angle is θ=360 degrees / (50 * 4) = 1.8 degrees (commonly known as full step). In eight-beat operation, the step angle is θ=360 degrees / (50 * 8) = 0.9 degrees (commonly known as half step). Detent torque: the locking torque of the motor rotor itself when the motor is not energized (caused by harmonics of the magnetic field tooth shape and mechanical errors). Static torque: the locking torque of the motor shaft when the motor does not rotate under rated static electrical action. This torque is the standard for measuring motor volume (geometric dimensions) and is independent of drive voltage and drive power supply. Although static torque is proportional to the electromagnetic excitation ampere-turns and related to the air gap between the stator teeth and the rotor, it is not advisable to excessively reduce the air gap and increase excitation ampere-turns to improve static torque, as this will cause motor heating and mechanical noise.

Felm Motor motor braking methods

Motor electrical braking methods include: dynamic braking, plugging braking, and regenerative braking. (1) During dynamic braking, the three-phase AC power supply to the motor is cut off, and DC power is supplied to the stator windings. At the moment the AC power is cut off, due to inertia, the motor continues to rotate in the original direction. The characteristics of this method are smooth braking, but it requires a DC power supply. For high-power motors, the cost of the required DC equipment is high, and the braking force is small at low speeds. (2) Plugging braking is divided into load plugging braking and power supply plugging braking. Load plugging braking is also known as load hoisting plugging braking. This torque causes heavy objects to descend slowly at a stable speed. The characteristics of this braking are: the power supply does not need to be reversed, no special braking equipment is required, and the braking speed can be adjusted. However, it is only applicable to wound-rotor motors, where a large resistance must be connected in series in the rotor circuit to make the slip greater than 1. Power supply plugging braking: when the motor needs to be braked, simply swap any two phase power lines to reverse the rotating magnetic field for quick braking. When the motor speed reaches zero, immediately cut off the power. The characteristics of this braking are: fast stopping, strong braking force, and no need for braking equipment. However, during braking, the current is large, and the impact is also large, which can easily cause the motor to overheat or damage components in the transmission part. Regenerative braking, also known as feedback braking, occurs under the action of heavy objects (when a crane motor lowers a heavy object), where the motor speed is higher than the synchronous speed of the rotating magnetic field. At this time, induced current is generated in the rotor conductors, producing a torque in the opposite direction of rotation under the action of the rotating magnetic field. However, since the motor speed is high, a speed-changing device is required for deceleration.

Felm Motor motor performance

The output torque of the motor decreases as the speed increases, and drops sharply at higher speeds, so its maximum operating speed is generally 300～600RPM. AC servo motors provide constant torque output, meaning they can output rated torque within their rated speed (generally 2000RPM or 3000RPM), and provide constant power output above the rated speed. Four, overload capability differs; stepper motors generally do not have overload capability. AC servo motors have strong overload capability. Five, operating performance differs; stepper motor control is open-loop control. If the starting frequency is too high or the load is too large, step loss or stalling may occur. If the speed is too high when stopping, overshoot may occur. Therefore, to ensure control accuracy, acceleration and deceleration issues must be handled properly. AC servo drive systems are closed-loop control; the driver can directly sample the feedback signal from the motor encoder, internally forming position and speed loops, generally avoiding step loss or overshoot phenomena common in stepper motors, making control performance more reliable. Six, speed response performance differs; it takes 200～400 milliseconds for a stepper motor to accelerate from standstill to operating speed (generally several hundred RPM). AC servo systems have better acceleration performance. Taking Sanyo 400W AC servo motor as an example, it takes only a few milliseconds to accelerate from standstill to its rated speed 3000RPM, making it suitable for control applications requiring rapid start-stop. In summary, AC servo systems are superior to stepper motors in many performance aspects. However, stepper motors are often used as actuator motors in applications with lower requirements. Therefore, in the design process of control systems, factors such as control requirements and cost must be comprehensively considered to select the appropriate control motor.

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