ATB ANTRIEBSTECHNIK motor Germany ATB ANTRIEBSTECHNIK model ATB ANTRIEBSTECHNIK price

ATB ANTRIEBSTECHNIK motors are a type of electric motor powered by simultaneously connecting to 380V three-phase AC current (phase difference 120 degrees). Because the rotor of a three-phase asynchronous motor rotates in the same direction but at a different speed than the stator's rotating magnetic field, there is slip, hence the name three-phase asynchronous motor. The rotor speed of a three-phase asynchronous motor is lower than the speed of the rotating magnetic field. The rotor windings generate electromotive force and current due to relative motion with the magnetic field, interacting with the magnetic field to produce electromagnetic torque, achieving energy conversion.

ATB ANTRIEBSTECHNIK motor braking methods

Regarding motor braking, users often confuse the functions of electromagnetic braking, regenerative braking, and dynamic braking, leading to the selection of incorrect components. Dynamic brakes consist of dynamic braking resistors and shorten the mechanical feed distance of servo motors through energy consumption braking during faults, emergency stops, or power outages. Regenerative braking refers to the process where the servo motor feeds the energy generated during braking back to the DC bus via the inverter circuit during deceleration or stopping, where it is absorbed by the RC circuit. Electromagnetic braking locks the motor shaft using a mechanical device. Differences among the three: (1) Regenerative braking only works when the servo drive is operating normally; it cannot brake the motor during faults, emergency stops, or power outages. Dynamic brakes and electromagnetic brakes do not require power to operate. (2) Regenerative braking operates automatically by the system, whereas dynamic brakes and electromagnetic brakes require external relay control. (3) Electromagnetic brakes are generally activated after SV and OFF; otherwise, amplifier overload may occur. Dynamic brakes are generally activated after SV, OFF, or main circuit power loss; otherwise, the dynamic braking resistor may overheat.

ATB ANTRIEBSTECHNIK motor applications

An asynchronous motor is an AC motor whose speed under load does not maintain a constant ratio to the frequency of the connected power grid. It also varies with the magnitude of the load. The greater the load torque, the lower the rotor speed. Asynchronous motors include induction motors, doubly-fed asynchronous motors, and AC commutator motors. Induction motors are the most widely used; unless causing misunderstanding or confusion, induction motors are generally referred to as asynchronous motors. In standard asynchronous motors, the stator windings are connected to the AC grid, while the rotor windings do not need connection to other power sources. Therefore, they offer advantages such as simple structure, ease of manufacturing, use, and maintenance, reliable operation, lighter weight, and lower cost. Asynchronous motors have high operating efficiency and good performance characteristics, running at near-constant speed from no-load to full-load, meeting the transmission requirements of most industrial and agricultural machinery. Asynchronous motors can also be easily adapted into various protective types to suit different environmental conditions. During operation, asynchronous motors must draw reactive excitation power from the grid, worsening the grid's power factor. Therefore, synchronous motors are often used for high-power, low-speed mechanical equipment such as ball mills and compressors. Due to the slip relationship between the speed of asynchronous motors and their rotating magnetic field speed, their speed regulation performance is poor (except for AC commutator motors). For transportation machinery, rolling mills, large machine tools, dyeing and papermaking machinery, etc., which require wide and smooth speed regulation ranges, DC motors are more economical and convenient. However, with the development of high-power electronic devices and AC speed control systems, the speed regulation performance and economy of asynchronous motors suitable for wide speed regulation are now comparable to DC motors. Asynchronous motors are mainly used as motors, with power ranges from a few watts to tens of thousands of kilowatts. They are the most widely used motors in various sectors of the national economy and daily life, providing power for various mechanical equipment and household appliances. For example, machine tools, small and medium-sized steel rolling equipment, fans, water pumps, light industrial machinery, metallurgical and mining machinery, etc., mostly use three-phase asynchronous motors (Asynchronous Motor) for drive; single-phase asynchronous motors are widely used in household appliances such as electric fans, washing machines, refrigerators, and air conditioners. Asynchronous motors can also serve as generators, used in wind power plants and small hydropower stations.

ATB ANTRIEBSTECHNIK motor structure

Motor structures: 1, flat-type single-sided long-stator electromagnetic linear synchronous motor. There is tangential driving force and normal attractive force between the mover and stator of flat-type single-sided long-stator linear synchronous motors. Motor excitation can be changed by adjusting the current magnitude in the mover pole windings. During operation, the long stator windings are switched on in segments. Since only part of the area under each energized stator segment is covered by poles, the leakage reactance of the stator windings is relatively high. Part of the supply voltage is used to overcome the leakage reactance voltage drop. 2, cylindrical linear synchronous motor. A cylindrical linear synchronous motor is a cylindrical linear motor shaped like a rotary motor. These linear motors are generally short-primary, long-secondary types. 3, permanent magnet linear synchronous motor. Permanent magnet linear synchronous motors use permanent magnets for excitation, combining the dual characteristics of permanent magnet motors and linear motors. Compared to linear induction motors, permanent magnet linear synchronous motors have higher mechanical performance indicators, smaller size, and lighter weight, and possess regenerative braking functionality. The main disadvantages are higher cost and more complex control. 4, hybrid excitation linear synchronous motor. Among linear synchronous motors, there are excitation systems using a mix of high-performance permanent magnets and electrically excited coils, also known as controllable permanent magnet linear synchronous motors. Their main feature is that basic excitation is provided by permanent magnets, while dynamic adjustment is achieved through electrical excitation, highlighting the advantage of controllability.

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