Siemens 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 large AC contactor and thermal relay should be used for the motor of 3KW? There are steps to calculate better.
1, rated current = power *2, or 6A2, the selection of AC contactor, the current domestic > = rated current, usually for a minimum of 9A. The reason is why recommend you go with CJX1 0922 or CJX2 0911 9A.3 、 thermal relay is usually a current range, rated current included in the range, preferably near the middle, which is ideal.Selection of domestic products, circuit breakers, contactors and other appropriate amplification, because the quality is not reassuring.
Q:What is the difference between the excitation winding and armature winding of AC motor?
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).
Q:Braking principle of 220V alternating current motor
1. the basic structure of three-phase asynchronous motorThe construction of three-phase induction motor is also divided into two parts: stator and rotor.(1) stator:The stator is the fixed part of the motor, which is used to produce rotating magnetic field. It is mainly composed of stator core, stator winding and frame.(2) rotor:The rotor is the main part of the rotor. There are two kinds of rotor, squirrel cage and wound rotor. Grasp their respective characteristics and differences. The squirrel cage type motor used for medium and small power (100k or less) is simple in structure, reliable in operation and convenient in operation and maintenance. Winding type can improve startup performance and speed regulation. The air gap between stator and rotor will affect the performance of the motor. The general air gap thickness is between 0.2-1.5mm.
Q:Please exchange the motor. Is it possible to adjust the speed with a governor?
The frequency changer is the alternating current frequency, so long as the equipment permits, may realize the stepless speed change in principle;The logarithm of the modified pole is a phase change, the variable series is limited, and the slip rate is changed simultaneouslySlip can be changed in a variety of ways, but the range is limitedI don't know which one exactly
Q:Why don't AC motors use commutators?
The principle of AC motor of DC motor is differentDC motor running by permanent magnet and coil production function to promote Miguel rotor, reversing to coil rotor 180 degrees (equivalent to the magnetic field direction 180 degrees) to maintain the current direction of the coil and the existing magnetic field to produce the correct momentAlternating current machines operate with rotating magnetic fields, rotating magnetic fields depend on the direction of the current, and alternating current has this property, so there is no need for commutatorHowever, this is not absolute, the DC motor can also use no commutator, AC can also use the commutator, and fixed rotor design relatedThe AC motor is used for excitation, that is, the magnetic field is provided to allow the coil to cut the magnetic field lines
Q:The difference between a DC motor and an AC motor for a garbage collector
Of course, alternating current is good. Because the AC motor is more stable than the direct current motor, the performance is stable, the heating is low and the efficiency is high.
Q:Working principle of AC motor
The principle of AC motor, electric coil in the magnetic field rotation. You know the principle of DC motor, DC motor? Is utilized to automatically change the direction of the current in the coil commutator, so the coil stress direction consistent and continuous rotation.
Q:How does the PLC control the speed of the motor?
How does the PLC control the speed of the motor?:There are a variety of ways, can be used in position control mode, PLC send a certain frequency pulse to the servo drive, a set of electronic gear ratio, the motor will run at a certain speed, change the speed of the motor only need to change the frequency of the pulse on the line, can also use the speed control mode, with a 0 PLC output to the positive and negative 10 volt analog voltage to the servo driver, set a speed command gain parameter, can control the motor rotation, the motor speed is proportional to the value of analog voltage.
Q:Is permanent magnet synchronous motor AC servo motor?
The permanent magnet synchronous motor is not the coil or induction material on the rotor, but the permanent magnet. Special servo drives are used to control such motors
Q:How to choose the AC motor?
1. According to the power consumption of the load, the motor power is selected, and the motor power is 1-1 of the load power. 2 times2, select the speed, the motor speed on those a few, choose a slightly larger than the load you need.3. Choose the installation form of the motor4, but also choose three-phase single-phase, as far as possible to choose three-phase

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