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6 pole motor speed

Frequency Converters. Variable Frequency Drives. Power Inverters. Voltage Converters. Soft Starters. There are many much more interesting questions related to the pole number of induction motors, e.

Does the induction motor supplied by the main grid say, 50 Hz increases its torque capability in "p" times with growing pole number "p" since its speed decreases in "p" time like in a gearbox?

Are performances of these two motors different or the same? Please note excluding frequency and inter-coil connections all remained the same.

6 pole motor speed

It depends on the required speed. The 60 is there to convert from revolutions per second to revolutions per minute as the frequency is in cycles per second. The induction motor will run at a slight less speed due to "slip" which is what gives the motor its torque.

For example 5.

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When selecting a three phase motor, the number of poles is chosen to achieve the speed of rotation that you require. The actual running speed is the synchronous speed minus the slip speed. For a 50 Hz three phase supply:. To determine the number of poles, you can read the data plate directly or calculate it from the RPM stated on the data plate or you can count the coils and divide by 3 poles per phase or by 6 pairs of poles per phase.

Where the power of the induction motor is constant, the torque increases at the rate that the speed decreases. I often see name plates with things like VAC, When these "specials" are made I usually see 6 pole machines - but that may be just a manufacturer's preference. You have no items in your shopping cart.

Blog Tags. Home Blog How to determine the pole number of an induction motor? How to determine the pole number of an induction motor? Saturday, November 15, Tags: Induction Motor. Leave your comment. Is no. So the name of the article is "how to determine the number of poles of an induction motor" i read the whole article still don't know how to determine the number of poles on an induction motor. Im new to this but if I want to mae a PMG at rpm w at 48 v how many poles and how many stators do I need?Log In.

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Number of Poles (AC Motor) Calculator

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Related Projects. Is it really that simple? What increase in current starting and full load can we expect? Will the motor be the same frame size? Thanks AD As for whether the pump will withstand this overload, good question. Is the suction and discharge piping sized to cope with additional flow?

6 pole motor speed

You will need to look at the pump curves to determine the new motor rating. Instinctively the new motor will be significantly larger in rating and likely at least one frame size larger.

That makes the power requirement 3. What hp motor presently? System DP will remain 'unchanged' The purpose of the mods is to increase flow - to 'as much as we can get' without major mods The current motor is 3.

You can contol some power by controlling the flow through valves. Consider using a higher speed motor with a VFD so you can adjust speed with much more flexibility. Pump power is proprtional to flow rate times differential pressure.

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For a positive displacement pump flow rate is propartional to speed. Pressure is controlled by system downstream from the pump, which has been stated to be constant.At the same time, techs also need to become familiar with the concept of poles, since poles represent one key to a successful replacement. Poles and Speed Every ac induction motor has poles, just like a magnet. However, unlike a simple magnet, these poles are formed by bundles of magnet wire windings wound together in slots of the stator core.

In most cases, you can look inside the motor and count the number of poles in the winding; they are distinct bundles of wire evenly spaced around the stator core. The number of poles, combined with the ac line frequency Hertz, Hzare all that determine the no-load revolutions per minute rpm of the motor. So, all four-pole motors will run at the same speed under no-load conditions, all six-pole motors will run at the same speed, and so on.

The mathematical formula to remember in helping make this calculation is the number of cycles Hz times 60 for seconds in a minute times two for the positive and negative pulses in the cycle divided by the number of poles. Note that when an ac motor is loaded, the spinning magnetic field in the stator does not change speed.

Motor Speeds, Both Loaded and Unloaded Our spinning four-pole motorthen, operates at 1, rpm in this example under no-load conditions and approximately 1, rpm under load. Motors of this speed are commonly found in belted applications such as blowers, fans, air-handling equipment, compressors, and some conveyors. Two-pole motors often are found in pump applications, such as sump pumps, swimming pool pumps, and water recirculating equipment.

One thing for the service technician to keep in mind in the field is that the higher the rpm, the noisier a motor may sound to the untrained ear. It is beneficial to become aware of the different speed-related sounds motors make.

They are often used for air-handling equipment, direct-drive applications, window fans, furnace blowers, room air conditioners, heat pumps, and other equipment where the relatively slower motor speed makes for quieter operation. All can come in either totally open, totally enclosed, or combination models, adding to their versatility. These operate at rpm unloaded and approximately rpm under load. They are being used in applications where customers expect quieter operation, such as room air conditioners and outdoor heat pump applications.

Less-common pole configurations include pole motors rpm that are used in applications requiring slow speeds, such as washing machines, and pole motors rpm unloadedoften found in ceiling fans. Simon is with A. Smith Corp. I want to hear from you. Tell me how we can improve. In this issue, we take a comprehensive look at the future of social media, SEO, apps, and more and how they can affect your contracting business. We also look at new home automation and zoning products and trends that will benefit your customers in terms of comfort and convenience.

This website requires certain cookies to work and uses other cookies to help you have the best experience. By visiting this website, certain cookies have already been set, which you may delete and block. By closing this message or continuing to use our site, you agree to the use of cookies. Visit our updated privacy and cookie policy to learn more.The main difference between 2 Pole Motors and 4 Pole Motors is that 2 Pole Motors have a single pair of magnetic poles whereas 4 Pole Motors have two pairs of magnetic poles.

A motor is a device that transforms electrical energy into mechanical energy in the form of torque supplied through a shaft. It functions on the principle of electromagnetic induction as defined by Michael Faraday. There are different types of motors, e.

A 2 pole motor is a type of motor that has two magnetic poles or a pair of the magnetic pole, i. On the other side, 4 pole motor is the motor with two pairs of magnetic poles present in alternating orders, i.

The number of poles has an inverse relationship with speed, i. So, a 2 pole motor has more speed than a 4 pole motor. But, for heavy power, 4 pole motor is best than 2 pole motor. Gearbox below rpm is always required for a 2 pole motor.

On the flip side, Generally, there is no need for gearbox in a 4 pole motor. A 4 pole motor has double work output than a 2 pole motor. The rotor of a 2 pole motor completes a single cycle for each cycle of the source.

On the other side, the rotor of a 4 pole motor brings to an end only half cycle for every single cycle of the source. A 2 pole motor is a type of motor with two magnetic poles or a pair of magnetic poles. It shows a north-south configuration. A 2 pole motor is more efficient with high speed and more RPM.

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At 60 Hz, a 2-pole motor has rpm. But, it delivers low torque, i. Moreover, it also consumes less energy and has less work output. This type of motor is not good for heavy power. A 4 pole motor is a type of motor that has 4 magnetic poles or two pairs of magnetic poles. It shows north-south-north-south configuration.

A 4 pole motor is less efficient with less speed and less RPM. It shows rpm at 60 Hz. But, it delivers more torque, i. It consumes more energy and twice works output than a 2 pole motor.

This type of motor is good for heavy power. Above discussion summarizes that a 2 pole motor is a more efficient and high-speed motor with less work output. On the other hand, a 4 pole motor is a less efficient motor with less speed but more work output.

Harlon currently works as a quality moderator and content writer for Difference Wiki. He graduated from the University of California in with a degree in Computer Science. Follow him on Twitter HarlonMoss. Difference Wiki Technology. Main Difference The main difference between 2 Pole Motors and 4 Pole Motors is that 2 Pole Motors have a single pair of magnetic poles whereas 4 Pole Motors have two pairs of magnetic poles. Harlon Moss Harlon currently works as a quality moderator and content writer for Difference Wiki.

Previous Post.Synchronous and approximate speed rpm at rated load for small and medium motors operating at 60 hz and 50 hz:. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro.

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6 pole motor speed

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Synchronous and approximate speed rpm at rated load for small and medium motors operating at 60 hz and 50 hz: Approximate Electrical Motor Speed rpm No. Poles Speed with Rated Load Synchronous Speed no Load 60 hz 50 hz 60 hz 50 hz 2 4 6 8 Privacy We don't collect information from our users.

Citation This page can be cited as Engineering ToolBox, Speed of Electrical Motors with operating Loads. Modify access date. Scientific Online Calculator. Make Shortcut to Home Screen?The ABB synchronous motors are known for meeting the high performance standards demanded by many of key industries and industrial sectors all over the world. This can be seen in our extensive line of "High Speed" synchronous motors which range from 1 to 70 MW in both fixed and variable speed designs.

Zone 1 and Zone 2 and Division 2 areas. Features Fabricated modular frame with welded steel construction both horizontal and vertical configurations Frame sizes range from mm shaft height Rotor windings made from rectangular copper wire and solid salient pole rotors Multiple starting methods are supported for fixed speed motors such as: Direct on line, reactor, autotransformer, capicator, Load commutated inverter LCIreactor capacitor.

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In addition LCI, Cycloconveter, and Voltage source inverter operation is supported for variable speed applications as well Excitation systems are avaialbe to operate as AC or DC, and either brushless or brushed with slip ring unit Comes standard with Micadur Compact Industry insulation system, which provides high dielectric strength and excellent heat transfer.Speed, torque, power and voltage are all important considerations when choosing a motor.

AC motors are unique because they are built to run at specific speeds regardless of their design or manufacturer. Common AC motor units are constructed with either two or four poles.

A magnetic field is created in the stator poles that induces resulting magnetic fields in the rotor which follow the frequency of the changing magnetic field in the stator. Two pole AC motors operating at 60 Hz will always run at approximately rpm, and four pole AC motors will have speeds around rpm. Keep in mind that the speed of an AC motor will not run at these exact numbers—and will be slightly lower—because there is a certain amount of slip that must be present for the motor to produce torque.

The rotor will always rotate slower than the magnetic field of the stator and is playing a constant game of catch up. This produces the torque to get an AC motor running.

The difference between the synchronous speeds of the stator and rpm and the actual operating speed is called slip. A control can be used to alter the speed of a three phase AC motor by increasing or decreasing the frequency that is sent to the motor, causing it to speed up or slow down. These motors are plugged directly into a standard wall outlet and operate using the set frequency available.

An exception to this rule of thumb would be a ceiling fan that runs using single phase AC motor, but has three different speed settings. The number of wire turns in an armature, the operating voltage of the motor, and the strength of the magnets all affect motor speed. If a DC motor is running on a 12 V battery, that is the maximum voltage available to the unit and the motor will only be able to perform at a speed rated for 12 V.

If the battery is low and supplying less voltage, the speed will decrease accordingly. DC controls adjust speed by varying the voltage sent to the motor this differs from AC motor controls which adjust the line frequency to the motor.

Typical no load or synchronous speeds for an AC fractional horsepower motor are or rpm, and rpm for DC fractional hp motors.

How to Determine Speed for an Ac Induction Motor

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6 pole motor speed

One of our team members would be happy to help. Contact us at or by email at sales groschopp. You can also chat with us using the green tab on the left side of your screen. Groschopp Universal motors are custom built to fit your application so no additional options are available to narrow the search. Standard frame sizes and motor features can be found on the Universal page.

Selected Products. How did you hear about us? AC Induction Motor Speeds AC motors are unique because they are built to run at specific speeds regardless of their design or manufacturer.

How to use the Motor Search Tool Narrow your search by selecting motor type, gearbox, voltage, and phase options for your desired motor. Yellow represents selected option. Dark gray represents available options. Light gray represents options not available with previously selected criteria. Not sure what you need?


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Tabar Posted on10:12 pm - Oct 2, 2012

Ich habe nachgedacht und hat diese Frage gelöscht