Automec srl motor Germany Automec srl model Automec srl price

Automec srl motors change speed by altering the number of magnetic pole pairs, voltage, current, frequency, etc., to achieve higher performance. Due to their excellent performance, variable-speed motors are widely used in steel, power plants, cable, chemical, petroleum, cement, textile, printing and dyeing, papermaking, machinery and other industrial sectors for stepless speed control of constant torque or decreasing torque loads. They are especially suitable for driving pumps and fans with large flow variations, achieving good energy-saving results

Automec srl motor structure

The motor consists of two parts: stator and rotor. Note: Do not confuse commutating poles with the commutator. The stator includes main magnetic poles, frame, commutating poles, brush gear, etc. The rotor includes armature core, armature (shu) winding, commutator, shaft and fan, etc. The rotor part of a DC motor consists of the armature core, armature, commutator and other components. The following is a detailed introduction to each component in the construction. 1. Armature core part: Its function is to house the armature winding and conduct magnetic flux, in order to reduce eddy current loss and hysteresis loss generated in the armature core during motor operation. 2. Armature part: Its function is to generate electromagnetic torque and induced electromotive force for energy conversion. The armature winding consists of many coils or glass-fiber-covered flat copper wires or high-strength enamel-coated wires. 3. The commutator, also known as the rectifier, in a DC motor, converts the DC current from the brushes into AC current within the armature winding, keeping the direction of electromagnetic torque stable. In a DC generator, it converts the AC electromotive force in the armature winding into DC electromotive force output at the brush terminals. The commutator consists of a cylinder made of many segments insulated from each other by mica. Each end of every armature coil is connected to two commutator segments. In a DC generator, the commutator converts the alternating electromotive force in the armature winding into direct electromotive force between the brushes, allowing current to flow through the load. The DC generator outputs electrical power to the load, while current also flows through the armature coils. It interacts with the magnetic field to generate electromagnetic torque, whose direction is opposite to that of the generator. The prime mover must overcome this magnetic torque to drive the armature rotation. Therefore, while the generator outputs electrical power to the load, it inputs mechanical power from the prime mover, realizing the conversion of mechanical energy into electrical energy by the DC generator.

Automec srl motor differences

The main difference between motors lies in whether the rotor speed is consistent with the stator rotating magnetic field. If the rotor speed is the same as the stator rotating magnetic field, it is called a synchronous motor; otherwise, it is called an asynchronous motor. In addition, the stator windings of synchronous and asynchronous motors are the same; the difference lies in the rotor structure. The rotor of an asynchronous motor is a short-circuited winding that generates current through electromagnetic induction. The rotor structure of a synchronous motor is relatively complex, with DC excitation windings, requiring an external excitation power supply to introduce current through slip rings. Therefore, the structure of synchronous motors is relatively complex, and the manufacturing and maintenance costs are relatively high. Compared to asynchronous motors which can only absorb reactive power, synchronous motors can both generate and absorb reactive power! The speed of a synchronous motor is synchronized with the electromagnetic speed, while the speed of an asynchronous motor is lower than the electromagnetic speed. For a synchronous motor, as long as it does not lose synchronism, the speed remains unchanged regardless of load size. The speed of an asynchronous motor changes constantly with the load. Synchronous motors have high precision but complex manufacturing, high cost and relatively difficult maintenance. Asynchronous motors, although slower in response, are easy to install and use, and are cheaper. Therefore, synchronous motors are not as widely applied as asynchronous motors. Synchronous motors are mostly used in large generators, while asynchronous motors are almost exclusively used in motor applications.

Automec srl motor structure

Motor structures: 1, Flat single-sided long-stator electromagnetic linear synchronous motor. There is tangential driving force and normal attractive force between the mover and stator of a flat single-sided long-stator linear synchronous motor. Motor excitation can be changed by adjusting the current magnitude in the mover magnetic pole winding. During operation, the long stator winding is switched on in sections. Since only part of the area under each energized stator section is covered by magnetic poles, the leakage reactance of the stator winding is large. 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 are excited by permanent magnets, combining the characteristics of both permanent magnet motors and linear motors. Compared to linear induction motors, permanent magnet linear synchronous motors have higher mechanical performance indicators, smaller volume, lighter weight, and regenerative braking capability. 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 completed by electrical excitation, highlighting the advantage of controllability.

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