Felm motor, German Felm motor model, Felm motor price

Felm motor is a discrete control motor that converts electrical pulse excitation signals into corresponding angular or linear displacement. This motor moves one step for each input electrical pulse, so it is also called a pulse motor. It is a micro-special motor that converts electrical pulse signals into angular displacement to control rotor rotation. It serves as an actuator in automatic control devices. For every pulse signal input, the stepper motor advances one step, hence it is also known as a pulse motor. Stepper motors are widely used in peripheral equipment of digital computers, as well as in printers, plotters, and disk drives. The drive power supply for stepper motors consists of a variable-frequency pulse signal source, a pulse distributor, and a pulse amplifier, which provide pulse current to the motor windings. The operating performance of a stepper motor depends on the good coordination between the motor and the drive power supply. The advantages of stepper motors include no cumulative error, simple structure, ease of use and maintenance, low manufacturing cost, and high ability to drive load inertia. They are suitable for small and medium-sized machine tools and applications with low speed and precision requirements. The disadvantages are lower efficiency, significant heat generation, and occasional "step loss".

Felm motor mechanical characteristics

Motor mechanical characteristics: The torque of a single-phase series-wound motor varies with time, meaning the torque magnitude differs at every instant, which is significantly different from the smoothness of DC motor torque; the output torque is effectively an average value. When the motor's magnetic circuit is not saturated, the magnetic flux is proportional to the excitation current, so the torque is proportional to the square of the current. When the motor's magnetic circuit is saturated, changes in current have little effect on magnetic flux, so the torque changes approximately in proportion to the current. High starting torque and resistance to stalling are valuable advantages of this type of motor, making it suitable for applications where starting is difficult. With constant applied voltage and an unsaturated magnetic circuit, an increase in load causes a corresponding increase in armature current, thereby increasing magnetic flux and resistive voltage drop. As indicated by the speed equation, the speed drops rapidly. Conversely, under no-load conditions, both current and magnetic flux are very small, resulting in very high no-load speed, which can easily damage the motor. For safety and motor protection, no-load operation should be avoided as much as possible. However, for series-wound motors used in power tools, which generally carry a working head, the no-load speed will not be too high. Furthermore, designs often limit the no-load speed to approximately 1.7 times the rated speed. For very low-power series-wound motors, the no-load speed will not be extremely high due to their inherent high torque. As load increases, speed decreases, keeping the output power relatively stable and preventing motor overload due to increased load. This characteristic makes these motors widely used in applications with large fluctuations in load torque, offering a wide speed regulation range. Regarding speed variation with load changes: when the load increases, the current in the armature winding increases accordingly. Since the stator field winding is connected in series with the armature winding, the current in the stator field winding is the same as that in the armature winding, thus it also increases, leading to an increase in magnetic flux. Because magnetic flux is inversely proportional to speed, the speed decreases. The increase in current also increases the resistive voltage drop across various parts, causing a decrease in electromotive force, which further contributes to the speed reduction. Therefore, compared to the mechanical characteristics of DC motors, those of single-phase series-wound motors are softer, making speed control more difficult.

Felm motor development trends

Permanent magnet synchronous motors (PMSM) are gradually being widely used in industrial production and daily life due to their high efficiency, high power-to-weight ratio, simple structure, and significant energy-saving effects. In particular, the successful development of high-temperature-resistant, high-performance neodymium iron boron (NdFeB) permanent magnets, along with further developments and improvements in power electronic components, has ushered in a new era for the research and development of rare-earth permanent magnet synchronous motors both domestically and internationally. This will lead to qualitative leaps in both theoretical research and application fields. Currently, development is trending towards ultra-high speed, high torque, high power, miniaturization, and high functionality. Permanent magnet synchronous motors do not require excitation windings, have a relatively simple structure, have no heat source in the magnetic field part, and do not require cooling devices. The high coercivity of the materials allows for larger air gap lengths, making it possible to significantly increase rotational speed. Due to the high maximum energy product of NdFeB permanent magnets, especially the ability to manufacture ultra-thin permanent magnets, it has become possible to produce ultra-micro and low-inertia motors that were previously difficult to make. Ultra-small motors with diameters of less than a few millimeters have been developed as drive sources for medical micro-machines, robotic arms for eye surgery, or robots for pipeline inspection. The world's smallest permanent magnet motor, with an outer diameter of 0.8mm and a length of 1.2mm, has already been manufactured.

Felm motor precautions

Protection of motor from oil and water. A: Servo motors can be used in locations subject to water or oil droplet exposure, but they are not fully waterproof or oil-proof. Therefore, servo motors should not be placed or used in environments submerged in water or oil. B: If the servo motor is connected to a gearbox, an oil seal should be used when operating the servo motor to prevent oil from the gearbox from entering the servo motor. C: Do not immerse the servo motor cable in oil or water. Two. Servo motor cable → Stress relief. A: Ensure that the cable is not subjected to torque or vertical loads due to external bending forces or its own weight, especially at the cable outlet or connection point. B: If the servo motor is moving, the cable (the one configured with the motor) should be securely fixed to a stationary part (relative to the motor), and an additional cable installed in a cable support should be used to extend it, thereby minimizing bending stress. C: Make the bending radius of the cable as large as possible. Three. Allowable shaft end load for servo motors. A: Ensure that radial and axial loads applied to the servo motor shaft during installation and operation are kept within the specified values for each model. B: Exercise extreme caution when installing a rigid coupling, as excessive bending load may cause damage or wear to the shaft end and bearings. C: It is recommended to use a flexible coupling to keep radial load below the allowable value; this component is specifically designed for servo motors with high mechanical strength. D: For allowable shaft loads, please refer to the "Allowable Shaft Load Table" (user manual). Four. Servo motor installation notes. A: When installing/removing coupling components to/from the servo motor shaft end, do not strike the shaft end directly with a hammer. (Striking the shaft end directly with a hammer can damage the encoder on the other end of the servo motor shaft.) B: Strive to align the shaft end to the optimal state (misalignment may cause vibration or bearing damage).

Weidou Intelligent Technology specializes in selling German Felm motors, Felm motor actuators, Felm motor drives, Felm motor synchronous motors, Felm motor servo motors, Felm motor DC motors, Felm motor AC motors, Felm motor stepper motors, Felm motor synchronous motors, Felm motor asynchronous motors, Felm motor single-phase motors, Felm motor three-phase motors, Felm motor drive motors, Felm motor geared motors, Felm motor electric motors. Felm motors are original imports from Germany. Customers are welcome to inquire and order.