Siemens 1PQ High Low Voltage AC Motor

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part namebrandmodelVoltageprotectioncooling
motorSiemens1LA81PQ8400V,690V,2.3KV,4.16KV,6KVIP55IC411 (1LA8,1LA4)
IC416 (1PQ8,1PQ4)



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Q:How to connect the AC motor?
There are two kinds of three-phase AC motorStar: the three connecting terminals are connected with three phase lines of the three-phase power supply, and the three terminals are shorted together with wires or metal pieces.
Q:When the AC motor is burnt out, is the stator burnt out or the rotor? What about DC motors?
It is a mechanical device used to realize the conversion of mechanical energy and alternating current energy. AC motor has become the most common motor because of the great development of AC power system. Compared to the AC motor and DC motor, because there is no commutator (see DC motor commutation), therefore has the advantages of simple structure, convenient manufacture, relatively strong, easy to make high speed motor, high voltage, high current, large capacity. The coverage of AC motor power greatly, from a few watts to several 101000 watts, even millions of kilowatts.
Q:The actual power consumed by a three-phase AC motor is equal to line voltage * line current. How do you explain that?
I guess the questioner didn't know the difference between the line voltage, the line current and the phase voltage, the phase current.Line voltage and line current are considered when standing on the power supply side or standing outside the power equipment, while the phase voltage and phase current are considered in the interior of the power equipment. Of a global quantity represented by a physical quantity such as power, the use of line voltage and line current will, of course, be more convenient and direct.
Q:What are the stator and rotor functions of an alternating current motor?
The role of the stator of an alternating current motor is:As part of the magnetic circuit of the motor and embedded stator windings. The stator core is laminated by 0.5mm thick silicon steel sheet, and the two sides of the brick and steel sheet are coated with insulating paint to insulate the sheets and sheets so as to reduce the core loss caused by the rotating magnetic field in the stator core. A plurality of same grooves are punched inside the stator core to be inserted into the stator winding.
Q:How can a DC motor be changed into a three-phase AC motor with good performance?
If the direct replacement is used, the mechanical characteristics and the service life of the motor will be directly affected. But as a technical transformation project, there are also successful cases. Priority is given to the output torque to meet the mechanical requirements, and also to match the power.
Q:Who knows the main difference between DC motor and AC motor, I hope to say a little more simple, thank you
DC motor speed control is simple, but the use of limited occasions. AC motor speed control is relatively complicated, but it is widely used due to the use of AC power supply.
Q:What's the difference between DC motor carbon brush and AC motor carbon brush?
The motor carbon brush is suitable for all kinds of motors, generators, wheel machines. The utility model has better commutation performance and long service life. Is the motor carbon brush for motor commutator or slip ring, as sliding contact body import and export current, its thermal conductivity, and good lubrication performance, and has certain mechanical strength and direction of the spark of instinct. Almost all motors use carbon brush, which is an important component of the motor. Widely used in all kinds of AC and DC generator, synchronous motor, battery DC motor, crane motor, collector ring, all types of welding machine, and so on. With the development of science and technology, more and more types and working condition of the use of the motor is more diverse, so need to have different grades of brush to meet these requirements, it is also with the brush type motor industry development more and more.
Q:Can AC motors be controlled by frequency converter?
Yes, three-phase induction motors are available
Q:Can the speed and torque of three-phase asynchronous AC motor be controlled at the same time?
Frequency converter frequency control principle is to change the pressure to change the power, frequencyFor example, the reference frequency is 50HZ, and the voltage is proportional to the frequency below 50HZ. The frequency is actually the speed of the reflected image. This torque is constant, which we call constant torque speed regulation. Torque magnitude equalT=9550*P (rated power) /N (rated speed)
Q:Why is DC motor wider than AC motor? High speed regulation accuracy? How do you know?
The speed regulation of DC motor usually depends on changing the voltage at the two ends of the armature. The speed and voltage are basically linear, so the speed regulation accuracy is high. However, due to the brush limit, the DC power is generally not largeThe speed change of an AC motor depends on changing the pole number or changing the frequency, while the mechanical characteristic is related to the rotor resistance, armature current and so on. The ancient and lower precision, to achieve servo control should be introduced into the closed loop control system.

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