Coel Motori motors Germany Coel Motori models Coel Motori prices

Coel Motori motors are devices that convert electrical energy into mechanical energy. They utilize energized coils (i.e., stator windings) to generate a rotating magnetic field, which acts on the rotor (such as a squirrel-cage closed aluminum frame) to form electromagnetic rotational torque. Motors are classified into DC motors and AC motors based on the power supply used. Most motors in power systems are AC motors, which can be synchronous motors or asynchronous motors (where the speed of the stator magnetic field does not remain synchronized with the rotor rotation speed). A motor mainly consists of a stator and a rotor; the direction of motion of current-carrying conductors under force in a magnetic field is related to the direction of the current and the direction of the magnetic flux lines (magnetic field direction). The working principle of a motor is that the magnetic field exerts force on the current, causing the motor to rotate.

Coel Motori motor applications

Motor variable frequency speed control has become the mainstream speed regulation scheme and can be widely applied to stepless speed transmission in various industries. Particularly with the increasingly widespread application of variable frequency drives (VFDs) in the field of industrial control, the use of variable frequency motors has also become more extensive. It can be said that due to the superiority of variable frequency motors over ordinary motors in terms of variable frequency control, wherever VFDs are used, we can easily see variable frequency motors. The social benefits of domestically produced high-voltage variable frequency devices are significant, mainly including energy saving, thereby conserving resources and reducing environmental pollution. They eliminate starting shocks to motors and impacts on the power grid, reduce failure rates of motors and equipment, and improve control precision and automation levels. The economic benefits of variable frequency speed control are also very significant. For pumps and fans, fluid flow rate is proportional to the first power of speed, torque is proportional to the square of speed, and power is proportional to the cube of speed. As speed decreases, motor power consumption drops by the cube, so the energy-saving effect of variable frequency speed control is very significant. If the flow rate drops from to , then the speed drops to , then the speed drops to , the head drops to , and the motor power consumption drops to , theoretically saving energy. If dampers or valves were originally used for regulation, a decrease in flow rate leads to an increase in head and a decrease in motor power; in this way, variable frequency speed control saves more energy than damper or valve regulation. In addition to energy saving and efficiency improvement, there are some indirect economic benefits for different loads, mainly including improved power factor, realization of soft start, reduction of electrical and mechanical damage to the motor caused by starting torque, and smooth, stable, and high-precision control.

Coel Motori motor mechanical characteristics

The basic characteristics of a motor are that the rotor winding does not need to be connected to other power sources, and its stator current is drawn directly from the AC power system. Compared with other motors, asynchronous motors have a simple structure, are easy to manufacture, use, and maintain, offer high operational reliability, are lightweight, and have low costs. Taking three-phase asynchronous motors as an example, compared with DC motors of the same power and speed, the former weighs only half as much as the latter, and the cost is only one-third. Asynchronous motors can also easily derive various product series according to the requirements of different environmental conditions. They also have load characteristics close to constant speed, meeting the driving requirements of most industrial and agricultural production machinery. Their limitation is that their speed has a fixed slip relative to the synchronous speed of their rotating magnetic field (see asynchronous motors), resulting in poorer speed regulation performance. In applications requiring a wide and smooth speed regulation range (such as driving rolling mills, hoists, large machine tools, etc.), they are less economical and convenient than DC motors. In addition, when asynchronous motors operate, they draw reactive power from the power system for excitation, which leads to a deterioration of the power factor of the power system. Therefore, in high-power, low-speed applications (such as driving ball mills, compressors, etc.), it is more reasonable to use synchronous motors. Due to the large production volume and wide usage of asynchronous motors, they must have numerous varieties, specifications, and compatibility with various machinery. Therefore, special attention must be paid to standardization, serialization, and generalization in the design and production of asynchronous motors. Among various product series, the three-phase asynchronous motor series, with the largest output and widest usage, serves as the basic series; in addition, there are several derived series (series derived by making partial changes to the basic series) and specialized series (series with special structures designed for special needs).

Coel Motori motor applications

Motors are mainly used as electric motors. They are the most widely used and highest-demand type of motor in industrial and agricultural production and all sectors of the national economy. Metal cutting machine tools, steel rolling equipment, blowers, crushers, water pumps, oil pumps, light industrial machinery, textile machinery, mining machinery, etc., mostly adopt asynchronous motor drives. In daily life, the application of asynchronous motors is also becoming increasingly widespread; single-phase asynchronous motors are used in household appliances such as electric fans, washing machines, refrigerators, and air conditioners. In electric drive systems, the vast majority of drive motors are asynchronous motors, accounting for approximately 60% of the total load on the power grid. The reason why asynchronous motors are widely used is that they have advantages such as simple structure, ease of use, reliable operation, higher efficiency, ease of manufacturing, and low cost. The speed regulation performance of asynchronous motors themselves is relatively poor; in occasions requiring a wide and smooth speed regulation range, DC motors are generally used. In the past ten to twenty years, AC speed regulation systems for asynchronous motors, developed based on power electronic devices and microcomputers, have improved the speed regulation performance of asynchronous motors, thus expanding their applications. When asynchronous motors operate, they must absorb reactive power from the grid, which will worsen the power factor of the grid. Since the power factor of the grid can be compensated by other means, this point does not hinder the widespread use of asynchronous motors.

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