Siemens 1PQ Series AC Motor

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Q:The working principle of AC motor!
The single-phase AC motor has only one winding, and the rotor is squirrel cage. When a single-phase sinusoidal current through the stator windings, the motor generates an alternating magnetic field, the magnetic field strength and direction for sinusoidal variation with time, but the spatial position is fixed, so it is also called the magnetic field is alternating pulsating magnetic field. The alternating pulsating magnetic field can be divided into two with the same speed, the rotation direction of the rotating magnetic field are on the contrary, when the rotor is at rest, the two rotating magnetic field generating torque of two equal and opposite in the rotor, the synthetic torque is zero, so the motor rotation. When we use a force of the motor rotation to one direction (e.g., clockwise), the rotor and the clockwise rotation direction of the rotating magnetic field between the motion of cutting magnetic lines becomes smaller; the rotor and the counterclockwise rotation direction of the rotating magnetic field between the motion of cutting magnetic lines becomes large. Thus, the balance is broken, and the total electromagnetic torque generated by the rotor will no longer be zero, and the rotor will rotate in the direction of the push.
Q:Does the DC motor work the same as the AC motor?
DC motor has fast response, large starting torque and rotational speed from zero to the rated speed with rated torque available performance, but the advantages of DC motor is a DC motor because of its disadvantages, to generate performance under rated load torque is constant, the armature magnetic field and the rotor flux to maintain constant 90 degrees, this by brush and commutator. Carbon brush and commutator motor rotates in sparks, so in addition to cause toner component damage, use is restricted.
Q:How to distinguish between DC motor and AC motor?
As communication is easier to obtain and easier to carry, so most of the electric machines we use today are driven by AC motors.
Q:What is brushless motor, no and brush what is the difference?
The difference between a brush motor and a brushless motor is whether it is equipped with a conventional brush commutator. The commutation of the brush DC motor is always achieved by touching the graphite brush with the ring commutator mounted on the rotor.The brushless motor will feedback the rotor position back to the control circuit through the Holzer sensor, so that it can learn the accurate time of the motor phase commutation. Most brushless motor manufacturers produce motors with three Holzer effect positioning sensors. Since brushless motor has no brush, it has no relevant interface, so it is cleaner and less noisy. In fact, it needs no maintenance and longer service life.
Q:What are the speed regulating methods of AC motors? What are the characteristics of each?
One, change pole logarithmic speed regulation method: change the stator winding of the red way to change cage motor stator pole count, to speed.Two, frequency conversion speed control method: use frequency converter to change the motor stator power frequency, thus change its synchronous speed regulation method.Three, cascade speed regulation method: cascade speed regulation refers to winding motor rotor circuit series into adjustable additional potential to change the motor differential, to achieve the purpose of speed regulation. Most of the differential power is absorbed by an additional potential added into the series, and then additional equipment is added to return the absorbed differential power back to the grid or to convert energy to use. According to the method of differential power absorption and utilization, cascade speed regulation can be divided into motor cascade speed regulation, mechanical cascade speed regulation and thyristor cascade speed regulation, and thyristor cascade speed regulation is adopted.
Q:In the main circuit of AC motor, fuse can be used as short circuit protection, can it play the role of overload protection at the same time, why?
The fuse can not play the role of overload protection.
Q:Is household sewing machine good for AC motor or direct current motor?
If the family is good with two kinds of machines are good, each have their own advantages and disadvantages, their love for what kind of home use which, if not good with the pedal sewing machine, low price. Do you use the factory electric sewing machine, Erqianduoyi taiwan.
Q:How does the PLC control the speed of the motor?
See what you choose the motor, the general AC motor does not need PLC, you can use the frequency converter speed, how much speed you can change the frequency of inverter output current. If it is a stepping motor or a private server, a drive is needed, and a PLC is used to send a pulse control drive to drive the motor. PLC each sends a pulse, the motor turns an angle.
Q:Is the stepping motor an alternating current motor or a direct current motor?
General stepper motors are 2 kinds of power drives, unipolar (Uniporlar), bipolar (Bipoilar). In general, we refer to the stepper motor as a direct current motor.
Q:The difference between three-phase AC synchronous motor and three-phase AC asynchronous motor
Asynchronous motor is stator into alternating current, to produce a rotating magnetic field, and the rotor is produced by induction and magnetic field, so that the two magnetic field, so that the rotor rotates the rotating magnetic field of stator and rotor. The stator rotating magnetic field than a slow slip, not synchronous so called asynchronous machine.The rotor of a synchronous motor is a constant magnetic field which is added by the man to the direct current, so that the rotor is synchronized with the rotating magnetic field of the stator, and then the synchronous motor is called synchronous motorStructure and principle

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