ps-antriebstechnik motors Germany ps-antriebstechnik models ps-antriebstechnik prices

ps-antriebstechnik 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 produce 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 or asynchronous (where the speed of the stator magnetic field does not remain synchronized with the rotor's rotational speed). A motor mainly consists of a stator and a rotor. The direction of force-induced motion of current-carrying conductors in a magnetic field depends on the direction of the current and the direction of the magnetic flux lines (magnetic field direction). The operating principle of a motor is the force exerted by the magnetic field on the current, causing the motor to rotate.

ps-antriebstechnik motor armature reaction

The effect of armature current interference on the magnetic flux generated by the magnetic field. The state varies depending on the phase difference between the armature voltage and the armature current. When the power factor is 1, the magnetic flux on the leading side along the direction of pole rotation is strengthened, while the flux on the trailing side is weakened. In the case of a motor, the magnetic flux advances ahead of the rotor, and the flux pulls the rotor in the acceleration direction. Conversely, in the case of a generator, the flux lags behind the rotor, and the flux pulls the rotor in the deceleration direction. This corresponds to the torque generated by Maxwell stress based on the principle that "contractile force acts on magnetic flux lines." When the power factor is lagging, the magnetic flux acts in the direction of increasing flux. When the power factor is leading, its action is in the direction of weakening flux. In synchronous generators and synchronous motors, the leading/lagging nature of the armature current relative to magnetizing/demagnetizing effects is opposite. This relationship can be unified by understanding whether weak or strong excitation and reactive power are being produced or absorbed. In weak excitation with reduced field current, the voltage generated by the synchronous machine (no-load induced EMF) is lower than the system voltage (armature voltage), and the synchronous machine absorbs lagging reactive power from the system. Hereinafter, lagging reactive power is simply referred to as reactive power. In this case, the armature reaction becomes a magnetizing effect. The load observed from a synchronous generator produces reactive power at a leading power factor (capacitive). From the power source's perspective, a synchronous motor absorbs reactive power and presents a lagging load (inductive). In strong excitation with high field current, the voltage generated by the synchronous machine (no-load induced EMF) is higher than the system voltage (armature voltage), and the synchronous machine supplies reactive power to the system. In this case, the armature reaction becomes a demagnetizing effect. The load seen from a synchronous generator absorbs reactive power with a lagging power factor (inductive). In the case of a synchronous motor, reactive power is produced by the load (capacitive) generated from the power source.

ps-antriebstechnik motor operating principle

Inside the motor, ring-shaped permanent magnets are fixed. Current passing through the coils on the rotor generates Ampere force. When the rotor coils are parallel to the magnetic field, further rotation changes the direction of the magnetic field received. Therefore, the brushes at the ends of the rotor alternately contact the commutator segments, changing the direction of the current in the coils. As a result, the direction of the Lorentz force remains unchanged, allowing the motor to maintain rotation in one direction. The operating principle of a DC generator is to convert the alternating EMF induced in the armature coils into direct current EMF at the brush terminals, utilizing the commutation action of the commutator in conjunction with the brushes. The direction of the induced EMF is determined by the right-hand rule (magnetic flux lines point into the palm, the thumb points in the direction of conductor motion, and the other four fingers indicate the direction of the induced EMF in the conductor). The direction of force on the conductor is determined by the left-hand rule. This pair of electromagnetic forces forms a torque acting on the armature, known as electromagnetic torque in rotating machines. The torque direction is counter-clockwise, attempting to rotate the armature counter-clockwise. If this electromagnetic torque can overcome the resisting torque on the armature (such as resisting torque caused by friction and other load torques), the armature will rotate counter-clockwise.

ps-antriebstechnik motor mechanical characteristics

Also known as an induction motor, this AC motor achieves electromechanical energy conversion to mechanical energy through the interaction between the air-gap rotating magnetic field and the induced current in the rotor windings, generating electromagnetic torque. It features a simple structure, ease of manufacturing, low cost, reliable operation, durability, high operating efficiency, and suitable operating characteristics. Three-phase asynchronous motors are primarily used as motors to drive various production machinery, such as fans, pumps, compressors, machine tools, light industrial and mining machinery, threshers and crushers in agricultural production, and processing machinery for agricultural products, among others.

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