Siemens 1LA8 High Low Voltage AC Motor

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part name	brand	model		Voltage	protection	cooling
motor	Siemens	1LA8	1PQ8	400V,690V,2.3KV,4.16KV,6KV	IP55	IC411 (1LA8,1LA4)
						IC416 (1PQ8,1PQ4)

Siemens 1LA8 High Low Voltage AC Motor

Q:How can I control the RPM of an industrial motor of 7 horse power? I need it to have high torque and low RPM, like 100 per minute.: *For stepless control of AC motor, you need to have a VFD [variable frequency drive]. Basic equation is: RPM=120*frequency/no. of poles here,no of poles are fixed for your motor and 120 is constant. So, to control the RPM you have to change the frequency. 100/120=frequency/no of poles 0.83 =frequency/no of poles check the no of poles of your motor and put in the above formula,you will get the frequency. #Example A 4-pole motor that is connected directly to 60 Hz utility (mains) power would have a synchronous speed of 1800 RPM: 60*120/4=1800 If the motor is an induction motor, the operating speed at full load will be about 1750 RPM. If the motor is connected to a speed controller that provides power at 40 Hz, the synchronous speed would be 1200 RPM: 120*40/4=1200 #A variable-frequency drive (VFD) is a system for controlling the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor. A variable frequency drive is a specific type of adjustable-speed drive. Variable-frequency drives are also known as adjustable-frequency drives (AFD), variable-speed drives (VSD), AC drives, microdrives or inverter drives. Since the voltage is varied along with frequency, these are sometimes also called VVVF (variable voltage variable frequency) drives. #Adjustable speed drive (ASD) or variable-speed drive (VSD) describes equipment used to control the speed of machinery. Many industrial processess such as assembly lines must operate at different speeds for different products. Where process conditions demand adjustment of flow from a pump or fan, varying the speed of the drive may save energy compared with other techiques for flow control. Where speeds may be selected from several different pre-set ranges, usually the drive is said to be adjustable speed. If the output speed can be changed without steps over a range, the drive is usually referred to as variable speed.

Q:How can the electricity of household electricity be connected to the three wire motor?: You must first determine whether the single-phase motor or three-phase motor, the general motors are nameplate. I do not know where you come to the power diagram, L1, L2 is a single-phase 380V diagram, single-phase 220V should be marked L, N, and the AC is no positive and negative poles.If the single-phase 220V motor, most of which is to be equipped with capacitors, with a multimeter can determine how to connect the three wires (see below); also have carbon brush motors, not capacitors.If there should be three-phase motor three-phase power, estimation of your home may not have three-phase power supply, the only way is to use the inverter, but the investment is relatively large, and the need for professionals to set.If you need the type of converter, you can ask again.

Q:Even when I put the AC 78 the house will get really hot..when we check the AC..the motor is frozen. We then have to turn it off for it melt and the ac will work again until it freezes. Any suggestions as to what can be wrong, what parts need to be replaced?No we don't need a new ac...: your freon is low,sounds funny, you would think it would be the other way around.get someone to put freon in it.

Q:After taking out and cleaning and coaxing the AC fan motor in my attic over the past year, I have finally removed it for good and ordered a new one along with a new capacitor, all from Grainger for around $220. This motor sits in a squirrel cage surrounded by a fan. The heat pump is located on the outside of the house. The old motor's connecting wires are red and yellow and black. How can I identify the right connections should the wires on the new one I'm picking up tomorrow have different colors? I am depending on the Grainger guys to correctly identify the correct connection to the capacitor. I do all this myself because I'm on a disability budget and have managed most similar repairs for over a decade. It's not always easy but the willingness to learn has always benefited. Thanks for guidance.: You are more then welcome. Helps keep my idle mind working. Every fan motor I have seen has the color code in the label. Common, should be 2 browns for the capacitor and 3 or 4 colors for the speeds. Check your old motor and write down what color is what speed. Now check the new motor and match the speed to the color. In most cases I have found them to be that same. Almost a industry standard. It may even tell you how to reverse it should it be running in the wrong direction. If the old motor did not have this or you can't make it out, then you need to check the wiring diagram for your unit. Should you need more help, please tell us you model number and the motors Grainger number. I have kept my acct. with them open. I notice that you are picking the motor up tomorrow. Take the old motor with you to compare. Check the new motor's name plate for that wiring diagram.

Q:Want to run for display. Very slow variable control so people can see operation clearly. Similar to a treadmill circuit but much lower HP. Would like control like rheostat for demonstration. DC motor preferred with transformer. Trying to keep cost at a minimum for the museum.: or if there are any manufacturing plants near you, someone might be ripping one out [or reducing spares inventory] and you could get it free.

Q:where is the ac blow motor RESISTOR on a honda accord 04?: The blower motor transistor is located on the passenger side of the vehicle. It will have 2 screws holding it into the HVAC unit as well as a 4 wire connector running to it.

Q:Can a DC series motor operated on an AC supply?: An universal AC/DC motor is series wound, so a series DC motor will probably run on AC, but if it was designed specifically as a DC motor rather than a universal, performance might suffer.

Q:cost of car AC motor blower?: Keyboard not working? Go to any autoparts store onine and key in your year, make, and model and search for blower motor. Then guess what? It tells you the price. Why would you ask us to do that for you?

Q:Why asynchronous motor AC excitation, rather than DC excitation?: Synchronous motor is also a kind of AC motor. Mainly used for generators, motors can also be used, generally used for larger power, speed does not require the adjustment of production machinery, such as large water pumps, air compressors and mine fans. In recent years, due to the development of permanent magnet materials and electronic technology, micro synchronous motor has been more and more widely used. One of the characteristics of synchronous motors is the steady running speed, N and stator current frequency f1 has a strict constant relationship, that is, n=60f1/p=n0 synchronous motor speed n and rotating magnetic field speed N0 the same. The name of "synchronization" comes from here. The stator of a synchronous motor goes without saying that the general rotor coil must be energized to keep it in sync with the stator. (the rotor of the micro synchronous motor can be made of permanent magnetic steel.)Asynchronous motor is different, the stator winding energized to generate rotating magnetic field, in the rotor to generate induction current, so that the motor rotation. Structure than synchronous motor simple

Q:AC speed regulation motor + turbo reducer instead of cam cutter + AC motor?: The main error in cam dividers is that:1, because of the impact of inertia, resulting in errors caused by elastic deformation2., because of inertia lead to overshoot error3, cam gap caused by machining gap error

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