YZP2(IPW54) Special frequency-changing three-phase asynchronous motor for tower crane

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5.5-hundreds KW


     YZPE2 variable-frequency three-phase asynchronous motor for lifting and metallurgy purposes is developed according to the characteristics of the
available tower crane, based on almost 10 years of experience in R&D of primary hoisting motor brake for the tower crane and metallurgy variable-frequency
motor. Lt is mainly used as a lifting mechanism of the tower crane, and also a trolley mechanism of heavy-duty crane


A variable一frequency special motor is equipped, available with a wide range offrequency conversion, small starting current and big starting torque;
A thermal protection component is buried into the winding, and can be wired into motor temperature control& protection system, making the motor
operation more secure and reliable;
Strengthened inter-turn insulation is adopted in the stator winding, so the insulation reliability is higher;
Equipped with axial一flow fan or centrifugal fan, with good cooling effect and lower motor temperature rise;
Special bearing is adopted for variable一frequency motor, so it's more suitable for variable一frequency operating environment;
The rotating shaft is subject to alloy steel heat treatment, showing better mechanical strength;
The brake (fitted with special manual release device) is a de-energized brake type (national utility model patent, Patent No. ZL201120188124.9), with big
braking torque and short response time


A rotary encoder can be set at the end ofthe motor as per the user demands, so a speed closed-loop control system isformed to make adjustment more reliable and accurate. The encoder model isconfirmed by the users when signing the contract

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Q:AC motor: use gear variable or frequency conversion?
The frequency converter is the electric energy control device that transforms the power frequency power to another frequency by the on-off function of the power semiconductor device. We now use the converter mainly adopts the AC-DC-AC mode (VVVF inverter or variable frequency vector control), the first AC power into DC power supply through the rectifier, then the AC power into DC power supply frequency and voltage can be controlled by the supply of electric motive. The frequency converter circuit is usually composed of rectifier, intermediate DC link, inverter and control of 4 parts. The rectifier is a three-phase bridge controlled rectifier, and the inverter is IGBT three-phase bridge inverter, and the output is PWM waveform. The intermediate DC link is filter, DC energy storage and buffer reactive power.
Q:Is the single-phase carbon brush motor a direct current motor or an AC motor?
The motor carbon brush is suitable for all kinds of motors, generators, wheel machines. The utility model has better commutation performance and long service life. Is the motor carbon brush for motor commutator or slip ring, as sliding contact body import and export current, its thermal conductivity, and good lubrication performance, and has certain mechanical strength and direction of the spark of instinct. Almost all motors use carbon brush, which is an important component of the motor. Widely used in all kinds of AC and DC generator, synchronous motor, battery DC motor, crane motor, collector ring, all types of welding machine, and so on. With the development of science and technology, more and more types and working condition of the use of the motor is more diverse, so need to have different grades of brush to meet these requirements, it is also with the brush type motor industry development more and more.
Q:What is AC induction motor?
Because the induction motor in the stator coil to enter AC current, such as three-phase alternating current. The stator coil produces a magnetic field that rotates with the change of alternating current, which we call rotating magnetic fields.
Q:What is the low power factor of AC motor in no-load operation?
Second, the motor idling power down to the minimum (only to maintain its own idle torque), the motor internal inductive reactive little change, so that the active power to reduce the reactive power unchanged, power factors, of course, low
Q:What about a single phase AC motor reversing?
The steering of a single AC motor has different rotating principles according to the structural differences. The following is a reference for professional data:Single phase motors are usually divided into four types: split phase, push cabinet, hood type and ordinary series excitation type. Since the structure of the four is different, the method of changing its rotation direction is also different
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 that the speed of n is stable, and there is a constant relationship between the stator speed and the frequency f1 of the stator currentN=60f1/p=n0The speed n of synchronous motor is the same as that of rotating magnetic field n0. The name of "synchronization" comes from here.
Q:Please exchange the motor. Is it possible to adjust the speed with a governor?
Many domestic electric fans use bidirectional thyristor to do phase shift speed regulation. This kind of speed regulation is to reduce the input current so that the motor can not move fast and can only reduce the speed. Like the light desk lamp, it is forced to adjust.
Q:Why is DC motor wider than AC motor? High speed regulation accuracy? How do you know?
And AC motor plus inverter (AC motor itself can not speed), if the stepless speed regulation, its torque is changed with the speed of the motor changes, generally when less than 30HZ when the operation is unstable. So, DC is wider than AC speed regulation.
Q:How the AC motor with DC power transfer
If the permanent magnet synchronous motor is used, the motor will be braked and the motor will be positioned at a fixed angle. Of course, we can not add full voltage.
Q:AC speed regulation motor + turbo reducer instead of cam cutter + AC motor?
But this method of use is not very reliable, if the switch is broken, then it has only been turned. So this method uses a lot of reciprocating rotation of the situation. A stroke switch is arranged at both ends of the reciprocating stroke, and if the detecting switch is broken, the switch is stopped by the stroke switch after the prescribed stroke is exceeded.In addition, the mechanism of the worm is only suitable for low speed, high speed condition, due to the impact of rotary body, namely back rebound, the backlash of worm caused by tooth side collision and rebound, resulting in inaccurate positioning.In addition, the rotating disk can not be subjected to impact load when it is stationary, and this will cause the rotation of the center of the rotating body because of the poor alignment, so that the positioning is accurate.

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