ABB AC Motor High Low Voltage QABP Series

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Q:AC servo motors generally choose synchronous or asynchronous?
This will be based on your purpose, such as CNC machine tools feed shaft, generally use AC synchronous servo motor, spindle general use AC asynchronous motor. The same power synchronous machine is much more expensive than the asynchronous machine. If it is common use, select synchronization
Q:The difference between a variable frequency motor and an ordinary AC motor
Due to the variable frequency motor under high frequency magnetic field, so the insulation level than ordinary motor, the principle is not ordinary motor with inverter driven, but in practice, in order to save money on many occasions with the need to speed motor to replace the ordinary motor, but ordinary motor speed accuracy is not high, energy transformation in the wind the pump in the often do. When the frequency converter motor is replaced by a common motor, the carrier frequency of the converter is as low as possible, so as to reduce the insulation damage of the high-frequency motor.
Q:Panasonic servo motor A4 series, AC synchronous motor or AC asynchronous motor?
Induction motors are also called induction motors. The electromagnetic fields on the rotor are induced by the stator magnetic field. The rotor of the synchronous motor must have its own magnetic field. The speed of the asynchronous motor varies slightly with the load, and this speed is lower than the speed of the stator magnetic field, so it is called asynchronous motor. The speed of the synchronous motor is strictly rotating according to the magnetic field speed of the stator, so it is called synchronous motor. Asynchronous motors can be activated directly. The synchronous motor needs a special starting device or starting winding, so the manufacturing process is complex and the cost is high. Asynchronous motors are generally used as motors. Synchronous motors are generally used as generators and as compensation machines.The first point is that asynchronous motors are for motors only, and are rarely used as generators. Synchronous motors are used to generate electricity. The principle of asynchronous motor is mainly in the stator through the 3 cross flow, so that it produces a rotating magnetic field, the speed is N0, that is synchronous speed. Different poles of the logarithm P, at the same frequency of f=50Hz alternating current, will produce different N0, n0=60f/p. The working principle is as follows: 3 phase symmetrical windings symmetrical 3 phase current to produce a rotating magnetic field, the magnetic field line cutting rotor windings, according to the principle of electromagnetic induction, the production of E and I in the rotor winding, rotor winding by electromagnetic force in a magnetic field, the electromagnetic torque, the rotor rotation, the rotor output mechanical energy. Driven by mechanical load rotation.
Q:Why should a single-phase AC motor start with a capacitor?
A starting winding is added to the stator, and the starting winding and the main winding are separated by 90 degrees in space. Connect a suitable capacitor starting after winding, the winding equivalent circuit becomes a resistor inductor and capacitor in series, as long as the capacitance value of the phase angle of voltage current meet ahead of a certain angle, such as 30 degrees; at the same time, if the current running winding perceptual hysteresis voltage of 60 degrees, then the current phase two the winding difference reached 90 degrees, the so-called phase separation principle. In this way, the two currents, which differ by 90 degrees in time, pass through two windings that are 90 degrees apart in space, which will produce (two phase) rotating magnetic fields in space, and the motor will rotate naturally.
Q:The difference between three-phase AC synchronous motor and three-phase AC asynchronous motor
Synchronous machines are mostly used in large generators, while induction motors are almost exclusively used in motorsSynchronous motor can be flexibly adjusted by excitation power factor; power factor of asynchronous motor is not adjustable, so in some large factories, induction motor is applied more, can add a synchronous motor with adjustable camera, used to regulate power factor and power factory interface. However, due to the synchronous motor with high cost and maintenance workload now, generally by the capacitance compensation of the power factor.Because synchronous machine excitation winding and slip rings, the operator needs to have a higher level of excitation control, in addition, maintenance free and asynchronous machine, maintenance workload is bigger; so, as a motor, now mostly choose the asynchronous motor.
Q:What is the difference between AC motor speed and DC motor speed?
DC motorThe stator of a direct current motor is a fixed magnetic field, and the direct current changes through the brush of the rotor to form a magnetic field around it, thereby rotating in the stator. In industrial enterprises, due to relatively reliable DC power supply, DC motor is generally used to require reliable operation of mechanical or mechanical spare security; and because the DC motor with variable speed input voltage can also change, so often need to control local DC motor are many, such as milling machine, planer, electric vehicles, subway trains and so on.
Q:AC operation of AC motor control circuit must be used?
When the current through the coil, in under the action of the permanent magnet, through attraction and repulsion when it rotates, and to balance the magnet, the original electric line is corresponding to contact the commutator and brush and brush away, connected to the group with the impulse to coil contacts should be so, repeat it, DC motor will turn up
Q:DC motor speed control performance is very good, why do we need AC motor?
Because the DC motor needs a set of high-power DC power supply, the AC motor doesn't need it.
Q:What is brushless motor, no and brush what is the difference?
The carbon brush is used as the two contact of the motor power supply, and is controlled by a speed change switch and a controller, and the stepless speed regulation of the electric bicycle 0-20 kilometers per hour is achieved by the two reduction of the gear and the overrunning clutch. The currently used brush high speed motor motor reduction gear high gold content, strong intensity, good abrasion resistance, reasonable design, so the repair rate is low; and the maintenance and replacement of gear and motor cost less, reduce the maintenance cost of electric bicycle; and brush electric machine can be achieved easily by overrunning clutch and flywheel human riding. Brush motor is to use brush mechanical reversing!
Q:What are the advantages of a DC motor and an AC motor?
An AC motor is a machine used to convert mechanical energy and alternating current energy. AC motor has become the most common motor because of the great development of AC power system. Compared with the direct current motor, the AC motor has no commutator, so the structure is simple, the manufacture is convenient, the utility model is firm, and the motor with high rotating speed, high voltage, large current and large capacity is easy to be made. AC motors have a large range of power. AC motors are usually divided into AC generators, AC motors and synchronous regulators according to their functions. The precision spindle n AC reversible Henglin motor working state, the same motor can be used as a generator and motor. It is not very precise to divide the motor into generator and motor, but some motors are mainly used as generator, some motors are mainly motor operated.

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