YTDVF Variable一Frequency Three一Phase Asynchronous Motor for Tower Crane Amplitude Mechanism

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Overview

the motor is a variable-frequency, three-phase asynchronous motor exclusively designed for the tower cranes and other similar amplitude mechanisms. It is applied to the
amplitude mechanisms in very harsh working conditions such as construction site or open pit quarry

Features

With introduction of spline output shat, it has good mechanical bearing capacity and excellent assembly performance;
Motor installation interface has the same size with original tower crane (POITAIN series), making it easier for switching and upgrading of old products

The motor is a variable-frequency motor featuring a wide range of speed regulation, small starting current, big starting torque and overload ability;
A thermal protection component is buried into the in stator winding and wired into the motor temperature protection control system, making motor more safer and reliable;
New brake (national utility model ZL201101881732, ZL201120188164.3) with higher safety and reliability this reduces the maintenance time and cost compact structure, small volume, lightweight as well as high reliability, so it can be braked quickly and positioned accurately. It is suitable for frequent starting and raking

Q: Or is it just me?: There is no AC motor on any car, What the heck are you talking about? that's why you received no answer! You don't even say what year it is, Are you talking about A/C System? The compressor? I advise that you rephrase your question

Q: How is frequency is efecting when a motor running by electric power,What is the relation of KW with FREQUENCY?: Dear Meetantacheri, I am not sure which frequency you refer to: 1) The Power Supply Frequency You need to look in your Ordinary Level Physics Books or on the wwweb at: Synchronous AC Motors Asynchronous AC Motors 2) The Rotational Speed of the Motor: For a DC Motor this depends on whether the rotor and stator are Series or Parallel Connected and the Mechanical Load that is on the Motor. For a Synchronous AC Motor you get field slippage if the mechanical load is too high I am not sure what you mean by the kW / f part. If a motor is overloaded it slows down, takes a lot of current and the power consumption rises. This overheats the motor and the winding are destroyed. (see back-EMF)

Q: is electric motor in rc toys have commutator?i want to know about it?: Ok, think of it this way. Ac comes from wall, ac can not be stored(it can but not economical, because alot is lot) you can rectify(change) Ac to dc, Which is most common in plug in electronics that have batteries. Dc is stored at a 1:1 ratio meanings what you put in battery is what you got later, (parasitic draw or draining of battery happens with time of course). What you have is battery powered thus meaning DC energy. Electrical and such is same as water, good luck, try reading about nikola tesla, he is amazing and youll learn alot. Electricity is way to the futureeeee

Q: How does an electric (AC) motor work?: The okorder /

Q: What are the direct and alternating current motors used in daily life?: DC has children's toys, razors, alternating hair dryers, washing machines

Q: what is the difference between ac servo sewing machine motor and dc servo sewing machine motor?: One requires alternating current to run, and the other requires direct current. Choose the one that fits with the power supply feeding the motor.

Q: Expansive speed control Not able to operate at low speed Are there anymore Disadvantages?: Speed Control The main disadvantage of AC motors, when compared with DC motors, is that their speed is more difficult to control. AC motors can be equipped with variable frequency drives, which provide smooth turning moment, or torque, at low speeds and complete control over the speed of the motor up to its rated value. Variable frequency drives improve speed control, but do create losses with reduced power quality. Control Complexity The device used to control an AC motor, known as an AC drive, is typically more complex than that used to control a DC motor. An AC motor controller must convert AC mains electricity to DC, and convert DC back again to an adjustable frequency and voltage output to the AC motor. By contrast, a DC motor has a separate field, or excitation, and power circuits, requiring just a single power conversion from AC to DC -- so the circuitry of a DC motor controller is simpler. Power Torque Historically, another disadvantage of AC motors has been that they develop less power, or less torque, per frame size. Research conducted by Rockwell Automation compared typical, commercial AC and DC motors in industry standard National Electrical Manufacturers Association (NEMA) frame sizes, and found this to be the case. However, AC and DC motors employ different classes of insulation and have different service factors -- the overload capacity at which the motor can operate without damage -- so direct comparison is not always straightforward. Other Disadvantages AC motors are typically more expensive than DC motors for most horsepower ratings. If the rotor of an AC motor rotates faster than the speed command of the AC drive, the motor acts as a generator and pumps, or regenerates, energy into the drive. If the drive cannot absorb this energy, the drive will switch off, or trip, with a fault. AC drives capable of regeneration are more complex and more expensive than DC regenerative drives. AC motors may also produce more audible noise than DC motors.

Q: I know they come with different max torques... but can you give me a range of torque for the 120VAC 60HZ motors?: Horsepower = Torque*Rpm/5252 Many AC motors have a pretty flat torque curve, but not all. You can get an approximate value from: Horsepower*5252/RPM = Torque in foot pounds Example, a 2HP/3600RPM motor would give about 3 foot pounds of torque at 3600RPM. If the motor is rated at 1/2 horsepower and 180RPM, you would get about 14.5 foot pounds of torque You can modify these motors' torque within very wide limits with a gear reduction, increasing or decreasing it.

Q: Or how do I find out? I've been trying my hand at some simple woodworking and I like it. I want a small lathe but don't really want to spend the money on one. I have an old vacuum cleaner that hasn't been used in a long time and I ripped the motor out of it. I'm planning on using this along with maybe some old bicycle wheels or maybe some roller skate bearings to make a small little lathe but I don't know if it turns enough rpms.: Most AC electric motor are designed to turn at 1760 RPM on 60 cycle. Washing machine motors are usually 2 speed of 1760 and 1140 for 60 Hz systems. 50Hz run a little slower. Other common speeds are 3520. I would go ahead and build your lathe and use it as a learning experiment. The turning speed for a lathe is slower than the 1760 common speeds so small drive pulley on the motor and 4 times larger should slow the lathe head to around 400 RPM.

Q: I want to put a quot;dimmer switchquot; (like the kind you put instead of a light switch to control how much electricity the circuit gets) before an AC motor running on 120 volts. Basically, we needed a motor for a project and it has a switch already on it for 2 different speeds of 600rpm or 1200 rpm (It was from a rather large industrial fan). I need it to spin slower and i was wondering if it will damage the motor to give it less voltage with the variable switch, or if the motor will run at all.Thanks in advance: An industrial fan will be ok on the dimmer switch, as long as the dimmer is rated for that power. Check carefully to be sure that it is. This won't hurt the motor.

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