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 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
Q:Why is the rotor of an AC motor neither magnetic nor can it rotate?
The DC motor and AC synchronous motor works as follows: the stator or rotor produces a rotating magnetic field, while the secondary winding forms polarity. Since the two poles of the stator and rotor are attracted or repelled by each other, the rotation is generated.
Q:How to change AC motor to generator?
The motor can be changed, or diesel gasoline engine as power drive, and capacitor connected to the motor at the outlet of the can, the capacitor adopts non polarity capacitor voltage, then Y must be greater than or equal to 250V, the delta connection pressure is greater than or equal to 400V. conditions must have left the rotor when the rotor magnetic remanence, no. With 6V DC motor in the three-phase one electrically connected to a few minutes, the rotor will produce remanence. Its efficiency is very low, three-phase motor with 4 poles. The speed is 3000 rpm. The maximum is 75%. after the transformation can only be used as emergency power. Do not try, there is not much sense, but can be used as academic discussion. The basic will not be adopted, too much waste, and here is the capacitor capacity at the discussion
Q:AC motor control chip
With two relays (or IGBT what) do isolation, change any of the two lines after the state of the line on the line. For example, when the A-C-B is turned on, the A-B-C is switched on, and if it is reversed, the drive relay (or IGBT) becomes a reverse.
Q:What is the influence on the motor when AC motor is connected to direct current?.
In the circuit of the home soybean milk machine, there is a rectifier circuit, and the motor is not an AC motor in the sense of pure.48V inverter, which means to convert 48V DC to 220V AC. But you this inverter because it is driven by the inductive load, the nominal power to more than double. Because the household machine (beating) Soybean Milk time is very short, usually in less than 3 minutes, so the motor temperature is relatively high, but can try 2 48V battery series 96V try, but first we must carefully look at the temperature rise of the motor.
Q:Speed control method of AC motor
The specific AC speed regulating device has:Efficient speed regulation includes:Changing pole logarithmic speed regulation -- squirrel cage motorSquirrel cage type motor controlled by frequency conversionCascade speed control - winding motorSynchronous motor of commutator motorInefficient speed control methods include:Stator voltage regulating speed governing squirrel cage motorSpeed control of electromagnetic slip clutch -- squirrel cage motorSpeed control of rotor series resistance winding motor
Q:Main structure of AC motor
Rotor: rotating shaft: Acting output torque. Rotor iron core: the silicon steel sheet which is insulated from each other is pressed on the rotor shaft, and there is a groove on the outer circle of the silicon steel sheet. For embedded rotor winding. Guide slot. Rotor winding: there are two kinds: one is squirrel cage, the other is winding type.
Q:The difference between synchronous motor and asynchronous motor
Induction motor, also known as asynchronous motor, that is, the rotor in rotating magnetic field, in the rotating magnetic field under the action of a moment of rotation, and thus rotor rotation. The rotor is a rotatable conductor, usually in the shape of a mouse cage. Invented by Nicola Tesla, an electrical engineer in 1887.The induction motor is also called asynchronous motor, that is, the rotor is placed in a rotating magnetic field, and a rotational torque is obtained under the action of the rotating magnetic field, so that the rotor rotates.
Q:The similarities and differences between DC brushless motor and AC motor
Brushless DC motor, the actual result is essentially different from AC motor, it is the direct current through the electronic oscillation circuit into alternating current, the frequency is generally adjustable, used to change the speed.
Q:Why do motors need capacitance when they start?
Only single-phase AC motors use capacitor, DC motor and three-phase AC motor are not needed.The two phase motor coil can not generate a rotating magnetic field, which must be in a coil on series capacitor, the current current branch ahead of another coil, in order to form a rotating magnetic field between the two coils, the rotation of the rotor.

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