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 can a DC motor be changed into a three-phase AC motor with good performance?
Selection of asynchronous motor, power 60kW, voltage 400V, speed of only 960 RPM selectable (6 pole), if the speed is not enough to add speed (AC motor only 1500, 1000 (960), 750, 500 and several speed; if optional) must be 1000, as long as the election with step motor, just the price is too expensive.If the power supply capacity is not enough, without speed regulation, you need to calculate the starting capacity, select the starting mode and motor.The starting modes of squirrel cage asynchronous motor include direct start and star triangle startingThe above is cheaperThe starting modes of winding asynchronous motors are resistance start and frequency sensitive variable resistance starting
Q:What is the difference between the excitation winding and armature winding of AC motor?
The motor defines the armature as the main power loop of the motor. You just have to think about the power of the stator circuit or the power of the rotor circuit. That big one is the armature". Power is voltage X current. Only synchronous generator and synchronous motor have excitation winding and armature winding. In general, AC induction motors do not have field windings. The asynchronous motor is divided into two major categories, squirrel cage and winding. The stator winding structure is the same. The squirrel cage rotor is a squirrel cage, and the winding rotor is a coil (which can be changed by an external device to change the rotor impedance). The so-called armature winding is the main power circuit of the motor". Rotor and stator coil which power is larger, which is "armature", needless to say, most of the stator coil is armature winding".
Q:Which price is higher, AC motor or direct current motor? Which one has a longer service life?
Exactly, if it is of the same size, should be AC motor, low price, long service life, AC motor makes the rotor rotating by electromagnetic induction, relative power, and internal heat production is less than that of dc;
Q:Can AC motors be controlled by frequency converter?
Only frequency conversion motor can use frequency converter to speed up, ordinary motor can not use frequency converter speed regulation.But it is possible to start the AC motor by using frequency converter.
Q:Is household sewing machine good for AC motor or direct current motor?
DC motor is good, because the DC motor speed up fast and stable.
Q:What is the size of DC motor and AC motor under the same power?
The output power is the same, and the DC motor is small.. The power consumption is the same as that of AC motor.
Q:100W AC motor or DC motor good?
The alternator is concerned, it can realize the direct energy feedback to the grid (but must ensure 4 conditions: the same voltage amplitude, phase and phase sequence of the same, the same frequency); but the DC generator power is required to process the alternating current into the inverter (DC said rectifier, the DC the process that converts the AC inverter), to feedback to the grid. So it also needs to increase the power of the inverter.
Q:The difference between three-phase AC synchronous motor and three-phase AC asynchronous motor
The stator windings of synchronous machines and induction motors are the same. The main difference is the structure of the rotorThere is a DC exciting winding on the rotor of synchronous motor, so the external excitation power supply is needed, and the current is introduced through the slip ring;The rotor of the induction motor is short circuited winding, which generates current by electromagnetic inductionAsynchronous motor has the advantages of simple, low cost, easy to install, use and maintenance. It is widely used. The disadvantages of low efficiency, low power factor of power grid and high efficiency disadvantage. Synchronous motor is a capacitive load, can improve the power factor. With large mining equipment.
Q:Why does the AC motor turn?Do I feel that the coil is not in a steady state?
Through the above analysis can be summed up as follows: when the working principle of the motor stator winding of the motor (three of the difference between the 120 electrical degrees), into three alternating current, will produce a rotating magnetic field, the rotating magnetic field cutting rotor windings, thus the induced current in the rotor winding (the rotor winding is a closed path). The rotor conductor carrier will produce electromagnetic force in the stator rotating magnetic field, so as to form the electromagnetic torque of the rotating shaft of the motor and drive the rotation of the motor and the motor rotation direction and rotation direction of the magnetic field.
Q:Why does high-speed rail use AC traction motors in China?
The design of asynchronous motor in AC motor is perfect, robust and easy to control. It is absolutely dominant in AC motor. The permanent magnet synchronous machine motor model is also very good, is the main application of high precision digital machine tools, hybrid electric vehicles, but also on some protection measures not in place, there is overheating phenomenon of demagnetization.

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