Standard three phase asynchronous motors

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NORD production of 4 very ordinary three-phase ac motor and three-phase ac braking power range 0.12 kW to 200 kW.Production of motor by NORD for independent brands, the production process does not involve the subcontractor, so there will be no bottlenecks, our customers can enjoy the shortest delivery time.If you use a NORD energy-saving three-phase motor, the maximum can save up to 40% of the energy consumption.NORD efficiency three-phase motor is also in line with the 1992 rules in the energy bill (EPACT) in the United States. 

Any applicable national, local and system-specific regulations and requirements must also be observed! 

Special designs and design variants may differ with regard to technical details. If anypoints are not clear, it is urgently recommended that you consult the manufacturer stating the type designation and motor number or have the maintenance work performed by NORD.

2.1 Field of Application 

Use of the motors: 

The motors may only be used for their intended purpose. The motors are designed with at least IP 55 protection (for degree of protection see name plate). They may be installed in dusty or damp environments. The necessary degree of protection and any additional precautions required always depend on the operating and environmental conditions. For outdoor installation and vertical designs, 

e.g. V1 or V5 with the shaft pointing downward, NORD recommends the use of the double fan hood option [RDD].   The motors must be protected against intense sunlight, e.g. by means of a protective shield. The insulation is tropicalised.  

Installation altitude: £1,000 m Ambient temperature: -20°C...+40°C. With standard motors, a greater ambient temperature range is permitted from -20°C...+60°C.  The rated power must however be reduced to 82% of the catalogue value.  If the maximum value of the ambient temperature is between +40°C and +60°C, the power consumption can be inversely interpolated linearly between 100% and 82%. The motor connection cables and the cable inlet glands must be suitable for temperatures ³ 90°C. 

 

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Q:How does the three-phase ac motor achieve constant power or constant torque output
Is generally frequency converter to realize, in the power supply of power frequency 50 hz, motor with frequency converter to belt, the inverter output below 50 hz, the motor is constant torque output, but in the inverter output above 50 hz, the motor is constant power output
Q:Increase the load on the motor, but not overload. Is the opportunity slow down?
With increasing force, the load increases, the torque increases, and the speed is slightly slower.
Q:Is the servo motor a dc motor or ac motor?
4, a: what is the servo motor servo motor is also called force motor, in the automatic control system, is used as actuators, converts the received electrical signal into angular displacement or velocity of motor shaft output. Divided into two major categories of dc and ac servo motor, its main characteristic is, when the signal voltage is zero no rotation, speed decreases with the increase of torque and uniform,
Q:Is the ac servo motor self internal speed control
Can be internal direct speed adjustment, use dot move speed pattern, normally use PLC to send the PLS pulse, also can use a single chip machine of course
Q:What is the difference between asynchronous and synchronous in the three-phase motor?
The so-called synchronous motor is the rotational speed of the armature winding, which is the same as the rotation of the rotor. Such an electric motor is typically made of a winding on the rotor and a concentrated excitation winding. No winding on the rotor, and the permanent magnet structure; The rotor has no winding, no permanent magnet, tooth and groove. There is a distributed winding on the stator. The use of such structures is to minimize the number of slides and brushes, which are called refield motors. There is also a special requirement for the excitation winding to be placed on the stator, which is commonly referred to as the armature type (such as the home ceiling fan). There is a big difference between asynchronous motors and synchronous motors: The work of synchronous motor depends on "the magnetic field is always in the shortest direction of the magnetic circuit", for example, in the case of the lost motor. After excitation on the rotor, N and S are present. And then the stator field is rotating, and its N, S polar interchanges, always correspond to the magnetic poles on the rotor. So it's in sync. More importantly, the magnetic poles of the fixed and rotor must be the same, otherwise the machine won't work.
Q:What is the control speed for ac servo motors?
By ac servo motor drives to work, of course, different types of servo motors have their rated speed, and speed control is achieved by the servo drive.
Q:What is the power of ac motor
Three-phase ac motor, three phase ac motor rated power = square root of 3 x x x rated current x rated voltage power factor efficiency.
Q:How to control the start-stop of 220V ac motor with a single chip?
The relay is ok, I use 12V voltage relay, 5V control. The model is not seen. The relay is supposed to be weak. It's isolated.
Q:How does the brush motor control the positive and backward rotation?
First, you should know that a brush motor, the principle of the motor as long as the change of the input voltage polarity can change the steering motor, moreover by changing the polarity of the magnetic field can also change the steering motor, can change the direction of the field current can be solved, hope to help you
Q:Common problems with ac motor
Why does the motor produce shaft current? The shaft of the motor - the shaft bearing seat - the current in the base circuit is called the shaft current. The cause of axial current generation: (1) magnetic field asymmetry; (2) there are harmonics in the electric current; (3) the manufacture and installation is not good, because the rotor eccentric causes the air gap to be uneven; (4) there are gaps between the two semi-circles of the removable stator iron core; (5) the number of scalloped iron cores that have a fan stack is not appropriate. Harm: make motor or ball bearing surface erosion, shape process, microporous worsen bearing operation performance, the friction loss and heat increase, resulting in Bearing burn out.

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