Electro Adda motor, German Electro Adda model, Electro Adda price

Electro Adda 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.

Electro Adda motor protection

Motor differential protection includes differential instantaneous trip protection and composite ratio differential protection with or without second harmonic braking. It is suitable for applications with three-side differential current input (three-winding transformers). It features comprehensive and powerful acquisition capabilities for analog voltage and current signals and digital I/O from primary equipment. Equipped with standard RS485 and industrial CAN communication ports, it realizes protection, control, and monitoring functions such as three-winding main transformer differential protection, two-winding main transformer differential protection, two-winding distribution transformer differential protection, generator differential protection, motor differential protection, and non-electrical quantity protection through reasonable configuration.

Electro Adda motor classification

Motors are classified into three-phase and single-phase types based on the number of phases. For the same volume, the output power of a three-phase reluctance synchronous motor is 1/3 to 2/3 higher than that of a single-phase reluctance synchronous motor. Single-phase reluctance synchronous motors are further divided into capacitor-start, capacitor-run, and capacitor-start-and-run types based on the starting method. Capacitor-start motors have high starting torque. Capacitor-run motors offer good running performance, high efficiency, high power factor, and low noise, but have lower starting torque. Capacitor-start-and-run motors combine the advantages of both, offering relatively high starting torque and good running performance. A reluctance synchronous motor is a type of micro synchronous motor. Its rotor has a salient-pole structure, appearing as a cylinder or disc. The entire rotor is constructed by inlaying magnetic and non-magnetic materials. The magnetic reluctance along the direct axis is lower than that along the quadrature axis, creating a salient-pole magnetic effect. When the stator windings are energized, a rotating magnetic field is generated in the air gap. This field produces magnetic pull, dragging the rotor to rotate synchronously. A reluctance synchronous motor is a synchronous motor with an unexcited rotor featuring regularly shaped salient poles, which may or may not be equipped with a squirrel-cage winding for starting. It is also known as a reluctance motor. A reluctance motor is equivalent to a salient-pole synchronous motor without excitation windings, generating electromagnetic torque by utilizing the difference in magnetic reluctance in the rotor magnetic circuit.

Electro Adda motor working principle

The motor uses a capacitor for phase shifting to separate another phase of AC current with a phase difference of 90 degrees from single-phase AC power. These two phases of AC current are fed into two or four sets of motor coil windings, forming a rotating magnetic field within the motor. This rotating magnetic field induces current in the rotor. The magnetic field generated by the induced current opposes the rotating magnetic field, causing the rotor to be pushed and pulled into rotation. Since the rotor must cut magnetic flux lines to induce current, the rotor speed must be lower than the speed of the rotating magnetic field; hence, it is called an asynchronous motor. Three-phase asynchronous motors do not require capacitor phase shifting, as they inherently have three-phase AC current with a phase difference of 120 degrees, resulting in a more uniform rotating magnetic field and higher efficiency. In permanent magnet synchronous AC motors, the magnetic field is generated by permanent magnets. The rotor coils are powered via brushes. The speed is an integer multiple (or fraction) of the AC frequency (depending on the number of rotor coil windings), hence the name synchronous motor. Motors where rotor coils are powered via brushes and the stator generates a rotating magnetic field through windings are classified as series-wound or shunt-wound motors based on the series or parallel connection between the rotor and stator coils. A DC motor consists mainly of a stator and a rotor. The stator has magnetic poles (wound or permanent magnet), and the rotor has windings. When energized, a magnetic field (poles) forms on the rotor. There is an angle between the magnetic poles of the stator and the rotor. The mutual attraction between the stator and rotor magnetic fields (between N pole and S pole) causes the motor to rotate. Changing the position of the brushes changes the direction of the angle between the stator and rotor magnetic poles (assuming the stator pole is the initial side of the angle, the rotor pole is the other side, and the direction from the rotor pole to the stator pole defines the motor's rotation direction), thereby changing the motor's rotation direction.

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