INDRAMAT motor Germany INDRAMAT model INDRAMAT price

INDRAMAT motors are a type of motor that changes the speed by altering the number of pole pairs, voltage, current, frequency, etc., to achieve higher 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 torque or decreasing torque. They are particularly suitable for driving pumps and fans with significant flow variations, achieving good energy-saving results.

INDRAMAT motor classification

The motor has similar teeth and slots distributed according to a certain pattern on the inner and outer surfaces of the stator and rotor cores. It generates torque by utilizing the change in magnetic reluctance caused by the relative position change of the stator and rotor core teeth and slots. The rotor core is made of silicon steel sheets or soft magnetic materials. When one phase of the stator is excited, the rotor turns to the position where the magnetic reluctance is minimized. When another phase is excited, the rotor turns to another position where the magnetic reluctance is minimized, and the motor stops rotating. At this point, the rotor has turned through a step angle θb, where N is the number of operating beats for the rotor to turn through one tooth pitch; ZR is the number of rotor teeth. There are many structural forms of reluctance stepper motors. The stator core can be single-segment or multi-segment; the magnetic circuit can be radial or axial; the winding phases can be three-phase, four-phase, or five-phase. The step angle of reluctance stepper motors can be achieved at 1° to 15°, or even smaller, with easy assurance of precision, higher starting and running frequencies, but higher power consumption and lower efficiency. Hybrid stepper motors have stator and rotor core structures similar to those of reluctance stepper motors. The rotor has permanent magnets that generate a unipolar magnetic field in the air gap, which is also modulated by the teeth and slots of the soft magnetic material on the rotor. Hybrid stepper motors combine the advantages of both permanent magnet stepper motors and reluctance stepper motors, with small step angles, high precision, high operating frequency, low power consumption, and high efficiency.

INDRAMAT motor applications

Motors are mainly used as electric motors. They are the most widely used and highest demand motors in industrial and agricultural production and various sectors of the national economy. Metal cutting machine tools, rolling mill equipment, blowers, crushers, water pumps, oil pumps, light industry machinery, textile machinery, mining machinery, etc., mostly use asynchronous motors for drive. In daily life, the application of asynchronous motors is also increasingly widespread, such as in household appliances like electric fans, washing machines, refrigerators, and air conditioners, where single-phase asynchronous motors are used. In electric drives, the vast majority of drive motors are asynchronous motors, accounting for about 60% of the total grid load. Asynchronous motors are widely used because they have simple structures, are easy to use, reliable in operation, highly efficient, easy to manufacture, and cost-effective. However, their speed regulation performance is poor, so DC motors are generally used in situations requiring a wide range of smooth speed regulation. Over the past decade or two, AC speed regulation systems for asynchronous motors based on power electronic devices and microcomputers have improved their speed regulation performance, making them even more versatile. During operation, asynchronous motors must absorb reactive power from the grid, which worsens the power factor of the grid. Since the power factor of the grid can be compensated by other means, this does not hinder the widespread use of asynchronous motors.

INDRAMAT motor classification

The rotor of the motor is designed with salient poles, and the field coils installed on the pole cores are connected in series, forming alternating opposite polarities, with two leads connected to two slip rings mounted on the shaft. The field coils are excited by a small DC generator or battery. In most synchronous motors, the DC generator is mounted on the motor shaft to supply the excitation current to the rotor pole coils. Since this type of synchronous motor cannot start automatically, a squirrel-cage winding is installed on the rotor for starting purposes. The squirrel-cage winding is placed around the rotor, with a structure similar to that of an asynchronous motor. When three-phase AC power is applied to the stator windings, a rotating magnetic field is generated inside the motor. The squirrel-cage winding cuts the magnetic flux lines, generating induced currents, which cause the motor to rotate. After the motor starts rotating, its speed gradually increases to slightly below the speed of the rotating magnetic field. At this point, the rotor field coils are excited by DC current, forming certain magnetic poles on the rotor. These poles attempt to track the rotating magnetic poles on the stator, increasing the rotor's speed until it synchronizes with the rotating magnetic field.

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