Siemens Original 1PQ Series AC Motor

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Q:What is AC induction motor?
The rotor does not directly enter the AC, the rotor is equipped with a closed loop conductor. The rotating magnetic field does relative motion with the rotor, and the closed conductor on the rotor cuts the magnetic field lines to produce an electric current, which then interacts with the rotating magnetic field of the stator so as to drive the rotor to rotate. As described above, the current in the rotor is induced by the rotating magnetic field of the stator, so it is called induction motor.
Q:What does the D axis and the Q axis mean for AC induction motors?
The D axis and the Q axis represent the direct axis and communicate. By decomposing the stator current into the direct axis component and the quadrature axis component, the armature responses are calculated respectively so as to better control the stator currents.In permanent magnet synchronous motor control, in order to obtain similar control characteristics of DC motor,
Q:Can any AC motor 220 and 380V control positive inversion? What are the conditions?
There are commonly used reverse switch control (Figure 1), switching control (Figure 2) and AC contactor controlSingle-phase series motor (portable electric tools) can be 2 lines of stator winding connected between the carbon brush can brush with control of the motor is reverse.Single-phase shaded pole motor with self shading coil can not change the position of the short circuit and embedded in the stator slots, the motor is not reversed.
Q:What are the speed regulating methods of AC motors? Detailed point
1. use frequency changer to change power frequency speed regulation, speed range is wide, stability smoothness is better, mechanical characteristic is hard. That is, with the rated load, the speed drops much less. Stepless speed regulation. It is suitable for most three-phase squirrel cage asynchronous motors.2., change the magnetic pole logarithmic speed regulation, belong to level speed regulation, speed adjustment smoothness, generally used in metal cutting machine tools.3. change slip speed regulation.
Q:Is the motor in the inverter air conditioner a direct current motor?
Frequency conversion only for AC motors.The DC motor controls its voltage and changes its speed. Frequency independent. In one case, the frequency of direct current is 0. Therefore, the use of frequency conversion is simply can not control the DC motor.AC motors can vary the speed by changing their frequency, but they can not be controlled by changing the voltage. There is only one result of changing the voltage, and the motor must be destroyed.
Q:How can the electricity of household electricity be connected to the three wire motor?
The three lines of the brushless DC motor are equivalent to the U, V and W three phase lines of the AC motor, which are respectively connected with the three phase line of the drive;If the current of the motor after the connection is large, vibration and abnormal rotation, then the order of the three wires in turn until the motor is running properly;One of the switched States turns the motor clockwise, the other turns the motor counter clockwise, and the other state of the motor does not function properly.
Q:Are there 3 harmonics in the voltage of a three-phase alternator? Why?
If the generator is delta connected, there is no 3 harmonic in its no-load voltage;
Q:What are DC and AC servo motors? What are the characteristics?
DC servo motor can be used in spark machine, machine hand, accurate machine, etc. at the same time, it can be added with reducer, which makes the equipment reliable and high torque.
Q:The similarities and differences between DC brushless motor and AC motor
Although the DC motor is supplied by direct current, the coil inside the rotor is still in the AC circuit. A live brush DC motor is commutated by an electric brush. And brushless motor is through the inverter circuit to DC into AC, and then to the coil. 12V cooling fans are common. It's commonly used in mainframe computers.AC motor does not need commutator (brush). Generally, permanent magnets are not needed. It would be nice to want to know more about buying a book on the principles of the motor
Q:What are the advantages of a DC motor and an AC motor?
The DC motor consists of two parts, stator and rotor, in which there is a certain air gap. The main feature of the structure is that it has an armature with a commutator. The stator of a direct current motor consists of a machine base, a main magnetic pole, a reversing magnetic pole, a front and back end cover, and a brush rack. The main magnetic pole is the main component of the air gap magnetic field of the DC motor. It is composed of a permanent magnet or a laminated core with a DC exciting winding. The rotor of the DC motor armature, the commutator (also called commutator) and shaft components. The armature is composed of two parts: armature core and armature winding. The armature core is made up of silicon steel sheets, and the slots are evenly distributed at its outer circle, and the armature windings are embedded in these slots. A commutator is a mechanical rectifier. The sheet is made of a metal clip or plastic to form a whole after it is folded into a cylindrical shape. Each commutator piece is insulated from each other. The quality of commutator has a great influence on the operation reliability.

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