YTRVF(W)Variable一Frequency Three-Phase Asynchronous Stewing Motor for Tower Crane

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


With introduction of spline drive shaft, it has good mechanical bearing capacity;
The motor is a variable-frequency motor featuring a wide range of speed regulation, high efficiency, small starting current, big starting torque and overload ability;
A thermal protection component is buried into the in winding, making motor more safer and reliable;
Excellent dedicated variable-frequency insulation materials are adopted, improving greatly the insulation reliability;
Compact structure, small volume, lightweight, so it can be braked quickly and positioned accurately. It is suitable for frequent starting and braking;
YTRVFW series motor is provided with an eddy current brake on the basis of YTRVF series. It enables more smooth starting and deceleration braking, making the operation
more smooth and accurate

This series motor is divided into F1 and F2
F1 with airvane brake;will be determined by the
F2 without airvane brake;users when signing the contract but an encoder interface can be reserved

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Q:AC servo motors generally choose synchronous or asynchronous?
It seems that there are asynchronous servo motors, but the synchronous servo motors are used in the market.
Q:How does the battery of the electric car drive the AC motor?
Need to correct it, electric motor is a brushless DC motor drive principle is relatively simple, with the ordinary two wheeled vehicle as an example, the motor outer rotor, is the rare earth permanent magnet, internal stator coil winding is energized, the electromagnetic coil is to produce magnetic force, when a specific set of coils to the rotor magnet, through the Holzer tube (magnetron) controller, to the coils to generate magnetic force (magnetic field and rotor at the same level of) to generate thrust, push the rotor to rotate an angle when rotating the coil after repeated the line behind the winding ring and controller action,
Q:The difference between a variable frequency motor and an ordinary AC motor
Due to the variable frequency motor under high frequency magnetic field, so the insulation level than ordinary motor, the principle is not ordinary motor with inverter driven, but in practice, in order to save money on many occasions with the need to speed motor to replace the ordinary motor, but ordinary motor speed accuracy is not high, energy transformation in the wind the pump in the often do. When the frequency converter motor is replaced by a common motor, the carrier frequency of the converter is as low as possible, so as to reduce the insulation damage of the high-frequency motor.
Q:Panasonic servo motor A4 series, AC synchronous motor or AC asynchronous motor?
Induction motors are also called induction motors. The electromagnetic fields on the rotor are induced by the stator magnetic field. The rotor of the synchronous motor must have its own magnetic field. The speed of the asynchronous motor varies slightly with the load, and this speed is lower than the speed of the stator magnetic field, so it is called asynchronous motor. The speed of the synchronous motor is strictly rotating according to the magnetic field speed of the stator, so it is called synchronous motor. Asynchronous motors can be activated directly. The synchronous motor needs a special starting device or starting winding, so the manufacturing process is complex and the cost is high. Asynchronous motors are generally used as motors. Synchronous motors are generally used as generators and as compensation machines.The first point is that asynchronous motors are for motors only, and are rarely used as generators. Synchronous motors are used to generate electricity. The principle of asynchronous motor is mainly in the stator through the 3 cross flow, so that it produces a rotating magnetic field, the speed is N0, that is synchronous speed. Different poles of the logarithm P, at the same frequency of f=50Hz alternating current, will produce different N0, n0=60f/p. The working principle is as follows: 3 phase symmetrical windings symmetrical 3 phase current to produce a rotating magnetic field, the magnetic field line cutting rotor windings, according to the principle of electromagnetic induction, the production of E and I in the rotor winding, rotor winding by electromagnetic force in a magnetic field, the electromagnetic torque, the rotor rotation, the rotor output mechanical energy. Driven by mechanical load rotation.
Q:Which is better, alternating current tubular motor and direct current tubular motor?
The alternator is concerned, it can realize the direct energy feedback to the grid (but must ensure 4 conditions: the same voltage amplitude, phase and phase sequence of the same, the same frequency); but the DC generator power is required to process the alternating current into the inverter (DC said rectifier, the DC the process that converts the AC inverter), to feedback to the grid. So it also needs to increase the power of the inverter.
Q:Is servo motor AC motor? What's the difference? How can I tell whether it is AC or DC?
AC motor, of course, is an AC synchronous motor, DC motor is DC power exchange, the general is UVW three-phase, see the change of the mark will know
Q:Main structure of AC motor
Rotor: rotating shaft: Acting output torque. Rotor iron core: the silicon steel sheet which is insulated from each other is pressed on the rotor shaft, and there is a groove on the outer circle of the silicon steel sheet. For embedded rotor winding. Guide slot. Rotor winding: there are two kinds: one is squirrel cage, the other is winding type.
Q:Are there 3 harmonics in the voltage of a three-phase alternator? Why?
If the generator is loaded and the load has another 3 harmonic generation, then there may be 3 harmonics in the outlet voltage when the generator is loaded;
Q:Why is DC motor speed regulating better than AC?
The magnetic field of an AC motor is strongly coupled and time-varying, while the external conditions change and the speed changes as well, and it changes.
Q:Can the welding line of AC welding machine be dead?
In fact, if we discuss the electric shock of the two wire from the wider range, the harm to the human body is varied. The human body in the welding process in contact with the two line, the current acting on the human body in the contact area will produce electricity burns, electric brand or the central nervous reflex and strong muscle contraction caused tissue fracture and fracture mechanical injury; arc welding process, the industry protection is not the time, can make it happen an eye disease or make the metal particles penetrate the skin causing skin metallization; in addition, there is a more severe shock.

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