ATAV motor Germany ATAV model ATAV price

ATAV motors are named for their armature winding and field winding connected in series. Single-phase series-wound motors are AC/DC universal motors; they can operate on either AC or DC power supplies. The single-phase series-wound motor is widely used. Its advantages include high speed, high starting torque, compact size, light weight, resistance to stalling, and a wide applicable voltage range. Speed control via voltage adjustment is simple and easy to implement.

ATAV motor applications

An induction motor is an AC motor in which the ratio of rotor speed under load to the supply grid frequency is not constant. It varies with the load magnitude; 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; where no confusion arises, the term 'induction motor' is generally used interchangeably with 'asynchronous motor.' In standard asynchronous motors, the stator windings connect to the AC grid, while the rotor windings require no external power connection. Thus, they offer simple construction, ease of manufacturing, use, and maintenance, reliable operation, lower mass, and lower cost. Asynchronous motors provide high operating efficiency and favorable performance characteristics, maintaining near-constant speed from no-load to full-load, meeting the drive requirements of most industrial and agricultural machinery. They can also be adapted into various enclosure types to suit different environmental conditions. During operation, asynchronous motors draw reactive magnetizing power from the grid, reducing the grid power factor. Therefore, synchronous motors are often used for high-power, low-speed equipment such as ball mills and compressors. Due to the slip between the rotor speed and the rotating magnetic field speed, asynchronous motors have limited speed control performance (except for AC commutator motors). For transportation machinery, rolling mills, large machine tools, dyeing, and papermaking machinery requiring wide and smooth speed control ranges, DC motors are more economical and convenient. However, with the development of high-power electronic devices and AC variable-speed drive systems, the speed control performance and economy of asynchronous motors suitable for wide speed ranges now rival those of DC motors. Asynchronous motors are primarily used as motors, with power ratings ranging from a few watts to tens of thousands of kilowatts. They are the most widely used motors in all 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 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 in wind power plants and small hydropower stations.

ATAV motor applications

The motor rotor has many small teeth uniformly distributed. The stator teeth have three excitation windings, whose geometric axes are sequentially offset from the rotor tooth axes. 0, 1/3 te, 2/3 te, (the distance between adjacent rotor tooth axes is the tooth pitch, denoted by te), i.e., A aligns with tooth 1, B is offset to the right from tooth 2 by 1/3 te, C is offset to the right from tooth 3 by 2/3 te, A' aligns with tooth 5. Rotation: If phase A is energized while phases B and C are de-energized, due to the magnetic field, tooth 1 aligns with A (the rotor is not subjected to any force; the same applies below). If phase B is energized while phases A and C are de-energized, tooth 2 should align with B; at this point, the rotor shifts to the right by 1/3 te. At this time, tooth 3 is offset from C by 1/3 te, and tooth 4 is offset from A by (te - 1/3 te) = 2/3 te. If phase C is energized while phases A and B are de-energized, tooth 3 should align with C; at this point, the rotor shifts further to the right by 1/3 te. At this time, tooth 4 is offset from A by 1/3 te alignment. If phase A is energized while phases B and C are de-energized, tooth 4 aligns with A, and the rotor shifts further to the right by 1/3 te. Thus, after the sequential energization states of A, B, C, and A, tooth 4 (i.e., the tooth preceding tooth 1) moves to phase A, and the motor rotor rotates one tooth pitch to the right. If A, B, C, A... are continuously energized, the motor rotates to the right by 1/3 te per step (per pulse). If A, C, B, A... are energized, the motor reverses. It can be seen that the motor position and speed have a one-to-one correspondence with the number of conduction cycles (pulse count) and frequency. The direction is determined by the conduction sequence. However, considering torque, smoothness, noise, and angle reduction, the conduction state A-AB-B-BC – C-CA-A is often adopted. This changes the original step size from 1/3 te to 1/6 te. Furthermore, through different combinations of two-phase currents, 1/3 te can be changed to 1/12 te, 1/24 te, which forms the basic theoretical basis for microstepping drive. It is not difficult to deduce: The motor stator has m phase excitation windings, whose axes are respectively offset from the rotor tooth axes by 1/m, 2/m ... (m-1)/m, 1. By conducting current in a specific phase sequence, the motor can be controlled to rotate forward or reverse—this is the physical condition for rotation. As long as this condition is met, we can theoretically manufacture stepper motors with any number of phases. Due to cost and other considerations, two-, three-, four-, and five-phase motors are most common in the market. Torque: Once the motor is energized, a magnetic field (flux Φ) is generated between the stator and rotor. When the rotor and stator are offset by a certain angle, a force F is produced, proportional to (d Φ / d θ) S. Its magnetic flux Φ = Br * S. Br is the magnetic flux density, S is the magnetic conductive area. F is proportional to L * D * Br. L is the effective core length, D is the rotor diameter. Br = N · I/R. N · I is the excitation winding ampere-turns (current multiplied by turns), R is the magnetic reluctance. Torque = Force * Radius. Torque is proportional to the motor's effective volume * ampere-turns * magnetic flux density (considering only the linear state). Therefore, the larger the motor's effective volume, the greater the excitation ampere-turns, and the smaller the air gap between stator and rotor, the greater the motor torque, and vice versa.

ATAV motor protection device

Motor differential protection devices are mainly used in large high-voltage motors in power plants, chemical plants, and similar facilities. If a severe fault causes motor burnout, it will seriously disrupt normal production and cause significant economic losses; therefore, comprehensive protection must be provided. Existing integrated motor protection devices mainly target small and medium-sized motors, providing protection functions such as instantaneous overcurrent, thermal overload inverse-time overcurrent, two-stage definite-time negative sequence, zero-sequence current, rotor stall, excessive start time, and frequent starting. However, for extra-large capacity motors above 2000KW, these devices cannot meet the sensitivity and speed requirements for internal fault protection. Therefore, this device was developed to work in conjunction with integrated protection devices, providing more reliable and sensitive protection measures for high-voltage motors. This device is designed as a three-phase longitudinal differential protection because the 3KV, 6KV, 10KV grids where extra-large capacity motors above 2000KW are located may have transformer neutrals grounded via high resistance. Three-phase longitudinal differential protection serves not only as the main protection against phase-to-phase short circuits in the motor stator windings and lead wires but also as the main protection against single-phase ground faults, acting to trip instantaneously.

Weidou Intelligent Technology specializes in selling German ATAV motors, ATAV motors, ATAV drives, ATAV synchronous motors, ATAV servo motors, ATAV DC motors, ATAV AC motors, ATAV stepper motors, ATAV synchronous motors, ATAV asynchronous motors, ATAV single-phase motors, ATAV three-phase motors, ATAV drive motors, ATAV geared motors, ATAV electric motors, ATAV original imports from Germany. We welcome inquiries and orders from customers.