LI XIANG Variable-frequency drive-lx3000-01

LI XIANG Variable-frequency drive-lx3000-01 System 1

LI XIANG Variable-frequency drive-lx3000-01

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Loading Port:: Ningbo

Payment Terms:: TT OR LC

Min Order Qty:: 1 unit

Supply Capability:: 10 unit/month

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Energy savings

Many fixed-speed motor load applications that are supplied direct from AC line power can save energy when they are operated at variable speed by means of VFD. Such energy cost savings are especially pronounced in variable-torque centrifugal fan and pump applications, where the load's torque and power vary with the square and cube, respectively, of the speed. This change gives a large power reduction compared to fixed-speed operation for a relatively small reduction in speed. For example, at 63% speed a motor load consumes only 25% of its full-speed power. This reduction is in accordance with affinity laws that define the relationship between various centrifugal load variables.

In the United States, an estimated 60-65% of electrical energy is used to supply motors, 75% of which are variable-torque fan, pump, and compressor loads. Eighteen percent of the energy used in the 40 million motors in the U.S. could be saved by efficient energy improvement technologies such as VFDs.

Only about 3% of the total installed base of AC motors are provided with AC drives. However, it is estimated that drive technology is adopted in as many as 30-40% of all newly installed motors.

An energy consumption breakdown of the global population of AC motor installations is as shown in the following table:

Global population of motors, 2009
	Small	General Purpose - Medium-Size	Large
Power	10W - 750W	0.75 kW - 375 kW	375 kW - 10000 kW
Phase, voltage	1-ph., <240V	3-ph., 200V to 1kV	3-ph., 1kV to 20kV
% total motor energy	9%	68%	23%
Total stock	2 billion	230 million	0.6 million

Control performance

AC drives are used to bring about process and quality improvements in industrial and commercial applications' acceleration, flow, monitoring, pressure, speed, temperature, tension, and torque.

Fixed-speed loads subject the motor to a high starting torque and to current surges that are up to eight times the full-load current. AC drives instead gradually ramp the motor up to operating speed to lessen mechanical and electrical stress, reducing maintenance and repair costs, and extending the life of the motor and the driven equipment.

Variable-speed drives can also run a motor in specialized patterns to further minimize mechanical and electrical stress. For example, an S-curve pattern can be applied to a conveyor application for smoother deceleration and acceleration control, which reduces the backlash that can occur when a conveyor is accelerating or decelerating.

Performance factors tending to favor the use of DC drives over AC drives include such requirements as continuous operation at low speed, four-quadrant operation with regeneration, frequent acceleration and deceleration routines, and need for the motor to be protected for a hazardous area. The following table compares AC and DC drives according to certain key parameters:

Drive type	DC	AC VFD	AC VFD	AC VFD	AC VFD
Control platform	Brush type DC	V/Hz control	Vector control	Vector control	Vector control
Control criteria	Closed-loop	Open-loop	Open-loop	Closed-loop	Open-loop w. HFI^
Motor	DC	IM	IM	IM	Interior PM
Typical speed regulation (%)	0.01	1	0.5	0.01	0.02
Typical speed range at constant torque (%)	0-100	10-100	3-100	0-100	0-100
Min. speed at 100% torque (% of base)	Standstill	8%	2%	Standstill	Standstill (200%)
Multiple-motor operation recommended	No	Yes	No	No	No
Fault protection (Fused only or inherent to drive)	Fused only	Inherent	Inherent	Inherent	Inherent
Maintenance	(Brushes)	Low	Low	Low	Low
Feedback device	Tachometer or encoder	N/A	N/A	Encoder	N/A

Q: I opened up my mouse, and im currently using it without the top, because the left click on the mouse is only working about 1 in every 50 or so clicks with the shell on it.Is there a way I can make the click work again with the shell on or do I simply have to buy a new mouse?: Hi The 'click' is a microswitch tripping. Sometimes the plastic wears down just enough so the switch won't trip. Put a small piece of electrical tape on the back side of the mouse button and try it. Good luck!

Q: I am an electrical engineering student ,but I dont know what to do when I graduate. I like music and I want to do something with music. I have heard of audio/sound or acoustic engineering, but I don't know exactly what an audio/sound or acoustic engineer does.: You could build electronic music instruments and effects. Amplifiers are another domain were first class talent is needed. All of this sounds easy but wait until you try and you will find that none of it is.

Q: I want to use scientific equipment that will measure the electrical conductivity of water. I only want to electrocute the water and measure the current as a last resort.: water doesn't conduct electricity, the impurities in it do salt, chlorine, etc. distilled water has no conductivity.

Q: during line to ground fault, is there really a current that will flow in the ground, how will the grounding rod help if there is no connection back to the source? please explain how grounding aids tripping of C.B's: In maximum mainscontinual distribution structures, the impartial is grounded at the substation transformer and usually at the get right of entry to element to human being premises. If a fault takes position which leads to a stay conductor entering touch with an uncovered conductive section of the package, any cutting-edge will bypass to floor and holiday a circuit breaker.

Q: I want to get into a field that involves fixing electrical equipment. I have always loved taking apart things like my Xbox/Playstation/cell phone so I could fixing them when they broke and I would like to further this into a career. What type of field should I study in order to pursue this goal? I am a student at the University of Arizona, so if you know of any programs there that would help a lot.: None, depending on how or where you work. If you work for yourself you don't need any degree at all. You need to be an electronics service engineer. You have to be able to do the job. That's more important than having a piece of paper that says you got good grades and showed up or class. (I would argue this is true for most fields) You can get a degree in electronics engineering at many schools. It would be very helpful to find work at a company specializing in service of these things. Nobody repairs cell phones, it just isn't worth doing.

Q: I need to cut a hole through 2(ish)cm of metal, or some sort of composite material I have at home to feed a few wires through. Is it possible to do it without any electrical equipment?: Careful there ! ! '2 cm. or so' of metal is likely to be part of a structural element. '2 cm. of metal covered composit' is likely to be a required heat shield for an item of equipment. It's not advisable to cut either without knowing what you're doing.

Q: And what does electrical engineer teach in college? Is it good for girls?: TAKE MY ADVICE, THIS FIELD IS NOT FOR GIRL. TAKE THE MEDICAL FIELD IS MUCH BETTER FOR HER.

Q: i have System:Hifonics BXi 2608D 2600 Watts RMS Mono Car Amplifier4 ohms: 850 watts x 1 chan. 2 ohms: 1700 watts x 1 chan. 1 ohm: 2600 watts x 1 chan2 KICKER S12L7 12 Solo-Baric Dual 4 ohms750 RMS 1500MAX a pieceI have it on a 5 farad capacitor but i believe that capacitor is a waste cause my lights dim very badly. I realize that kinetik has all different battery sizes. Whats the best battery to get if i run the battery on my my system only.and also what size should i get if i want to run on my car and system i still havent made my mind of: Kinetik makes choosing a Kinetik Power Cell simple. We made our model numbers equal to the wattage needed for your vehicle. For peak performance and the maximum lifespan of all electrical equipment in your car, simply add up the total wattage needed including all amplifiers, lights, winches, video and all other electronics and make sure the model numbers add up the same amount. Allow from 800 to 1200 watts to run the vehicle depending on the electrical requirements if you are replacing the under hood battery also. For example; a car with a stock 90 amp alternator can use up to 1200 watts to run the factory equipment already in the vehicle (90 amps x 13.6 volts 1224 watts). Remember, there is a reason the factory put that size alternator in the vehicle in the first place and it was not so you could have extra power to run your aftermarket equipment! You must add power if you increase the demand. If you add a 1000 watt amp and a 200 watt 4 channel amplifier and allow 1200 watts to run the car then make sure the Kinetik model numbers add up to 2400. 1200+1000+2002400. Assuming you are replacing the starting battery with a Kinetik Power Cell, install the size that best fits the space (for example an 1800) and add the rest of the 2400 needed to the rear near the amplifier (a 600). In this car a KHC1800 and a KHC600 add up to 2400 watts total and the car should have plenty of power assuming everything else is working properly. If you decide to u want a separate battery to run your system i would recommend you buy a battery isolater connect it in between the two batteries by parallel wiring it.

Q: doesnt it release toxins when heated or burned, also why do they use it in cookware, I thought it's supposed to be some high quality plastic that resist heat and deterioration by chemicals, and isnt it also very expensive, but then you see it used on cookware and a bunch of other cheap crap, for example teflon tape, you can buy it at the 99cents store, it cant be that great if they sell it there.: i will grant you with a itemizing, yet you should search for the makes use of your self. Microscope, centrifuge, pipettes, analytical balances, 8-properly plate, photospectrometer, stirrers, hotplates, gyratory shakers, computing gadget

Q: I am a freshman of the engineering program at the university of Wyoming. Right now I am going into electrical because I wanted to stay in Wyoming and I thought that it would be easier to get a job in the production and distribution of electricity through something like Rocky Mountain Power. I don't mind doing the math and physics for electrical, but I am thinking that I would enjoy becoming a mechanical engineer. At the moment I believe mechanical is much more hands on, designing parts and testing them. I don't know what these two would lead into though. Electrical makes more money, but is that worth it? Also how hard would it be to get a job in this region with mechanical?: both electrical and mechnical are good field.

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