ELEKTRA Motoren motors, German ELEKTRA Motoren models, ELEKTRA Motoren prices

ELEKTRA Motoren motors adjust speed by changing the number of magnetic pole pairs, voltage, current, frequency, and other parameters to achieve high performance. Due to their excellent performance, variable-speed motors are widely used in industries such as steel, power plants, cables, chemicals, petroleum, cement, textiles, printing and dyeing, papermaking, and machinery for stepless speed control of loads with constant or decreasing torque. They are particularly suitable for driving pumps and fans with significant flow variations, achieving good energy-saving results.

ELEKTRA Motoren motor performance

The design of the motor spindle shaft end is also a critical issue for high-speed electric spindles. The selection of bearings for electric spindles and their preload technology mainly involve angular contact ball bearings, magnetic levitation bearings, water-based hydrostatic/hydrodynamic bearings, and air hydrostatic/hydrodynamic bearings for high-speed spindle units. Due to their high cost, complex control systems, and difficult heat dissipation issues, magnetic levitation bearings are not yet widely applied in high-speed spindle units. Water-based hydrostatic bearings are a popular research topic in China; they leverage the high heat capacity and low temperature rise of water to partially address the severe heating issues of conventional hydrostatic/hydrodynamic bearings, making them mainly suitable for low-speed, heavy-load applications. Air hydrostatic/hydrodynamic bearings have low radial stiffness and impact resistance but offer good high-speed performance, generally used in ultra-high-speed, light-load, precision spindles. Angular contact ball bearings with dn values are applied in the following high-speed spindle units, meeting requirements well in terms of speed limits, load capacity, stiffness, and precision, and are standardized with low costs. The performance of angular contact ball bearings can also be improved through the following methods.

ELEKTRA Motoren motor braking methods

Motor electrical braking methods include: dynamic braking, plugging, 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 winding. At the moment the AC power is cut, due to inertia, the motor continues to rotate in the original direction. This method features smooth braking but requires a DC power source; for high-power motors, the cost of the required DC equipment is high, and the braking force is small at low speeds. (2) Plugging is divided into load plugging and power supply plugging. Load plugging, also known as load-induced plugging, allows heavy loads to descend slowly at a stable speed. The characteristics of this braking method are: no need to reverse the power supply, no specialized braking equipment is required, and the braking speed can be adjusted. However, it is only applicable to wound-rotor motors, where a large resistor must be connected in series to the rotor circuit to make the slip greater than 1. Power supply plugging: When the motor needs to brake, simply swap any two phase power lines to reverse the rotating magnetic field, achieving rapid braking. When the motor speed reaches zero, the power supply is immediately cut off. The characteristics of this braking method are: fast stopping, strong braking force, and no need for braking equipment. However, due to the high current and impact during braking, the motor is prone to overheating, or damage may occur to transmission components. Regenerative braking, also known as feedback braking, occurs when the motor speed exceeds the synchronous speed of the rotating magnetic field under the action of a heavy load (e.g., when a crane motor lowers a load). At this time, induced current is generated in the rotor conductors, producing a torque opposite to the direction of rotation under the influence of the rotating magnetic field. However, since the motor speed is high, a variable speed device is required for deceleration.

ELEKTRA Motoren motor mechanical characteristics

The motor has the following features: Class B temperature rise design, Class F insulation manufacturing. It uses polymer insulation materials and vacuum pressure impregnation process as well as a special insulation structure, which greatly improves the insulation voltage resistance and mechanical strength of the electrical windings, making it capable of handling high-speed operation of the motor and resisting the impact of high-frequency current from inverters and voltage damage to insulation. High balancing quality, vibration level is Class R (vibration reduction class). The machining precision of mechanical parts is high, and specialized high-precision bearings are used for high-speed operation. A forced ventilation cooling system with imported axial fans ensures ultra-quiet operation, long life, and strong airflow. This guarantees effective heat dissipation at any speed, enabling long-term operation at both high and low speeds. Motors in the YP series designed using AMCAD software have a wider speed control range and higher design quality compared to traditional variable frequency motors. Special magnetic field design further suppresses higher harmonic magnetic fields to meet wide frequency, energy-saving, and low-noise design specifications. It offers wide-range constant torque and power speed control characteristics, smooth speed adjustment without torque ripple. Good parameter matching with various types of inverters allows zero-speed full-torque, low-frequency high-torque, precise speed control, position control, and fast dynamic response control when combined with vector control. The YP series variable frequency dedicated motors can be equipped with brakes and encoders, achieving precise stopping and high-precision speed control through closed-loop speed control. Using "gearbox + variable frequency dedicated motor + encoder + inverter" achieves precise control of infinitely variable ultra-low speed. The YP series variable frequency dedicated motors have good universality; their installation dimensions comply with IEC standards and are interchangeable with general standard motors.

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