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

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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


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

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Q:Braking principle of 220V alternating current motor
1. the basic structure of three-phase asynchronous motorThe construction of three-phase induction motor is also divided into two parts: stator and rotor.(1) stator:The stator is the fixed part of the motor, which is used to produce rotating magnetic field. It is mainly composed of stator core, stator winding and frame.(2) rotor:The rotor is the main part of the rotor. There are two kinds of rotor, squirrel cage and wound rotor. Grasp their respective characteristics and differences. The squirrel cage type motor used for medium and small power (100k or less) is simple in structure, reliable in operation and convenient in operation and maintenance. Winding type can improve startup performance and speed regulation. The air gap between stator and rotor will affect the performance of the motor. The general air gap thickness is between 0.2-1.5mm.
Q:What are the stator and rotor functions of an alternating current motor?
The role of the rotor of an AC motor is:The rotor is a part of the magnetic circuit of the motor, which forms the whole magnetic circuit of the motor together with the stator core and the air gap. The rotor iron core is generally laminated with 0.5mm thick silicon steel sheets. The rotor cores of medium and small AC motors are mostly installed directly on the motor shaft. The rotor core of the large AC motor is mounted on the bracket, and the support is sheathed on the shaft.
Q:What is the maximum speed of a three-phase AC motor?
Level two is close to 3000 rpm, does not include ultra high speed, ultra high speed has 6000
Q:Winding of single-phase AC motor?
Depending on the type of motor, the range motor is the same as you say. Asynchronous motors are not like this.
Q:How can direct current drive AC motors?
AC motor: a machine used to convert mechanical energy and alternating current energy. AC motor has become the most common motor because of the great development of AC power system. Compared to the AC motor and DC motor, because there is no commutator (see DC motor commutation), therefore has the advantages of simple structure, convenient manufacture, relatively strong, easy to make high speed motor, high voltage, high current, large capacity. The coverage of AC motor power greatly, from a few watts to several 101000 watts, even millions of kilowatts. In the early 1980s, the largest turbo generator reached 1 million 500 thousand kilowatts. The AC motor was invented by Nicola Tesla, an American scientist from Serbia.
Q:Who knows the main difference between DC motor and AC motor, I hope to say a little more simple, thank you
The direct current motor introduces the current into the rotor armature through the brush and commutator, so that the rotor is forced in the stator magnetic field to rotate. AC motor (AC asynchronous motor to commonly used as an example) is the alternating current into the stator winding, resulting in a rotating magnetic field in stator and rotor air gap, rotating magnetic field induced current in the rotor winding, the rotor stress in the stator magnetic field generated in the rotation.
Q:AC motor control chip
With two relays (or IGBT what) do isolation, change any of the two lines after the state of the line on the line. For example, when the A-C-B is turned on, the A-B-C is switched on, and if it is reversed, the drive relay (or IGBT) becomes a reverse.
Q:Does the AC motor have carbon brushes?
Yes。 Carbon brush for AC motors: carbon brushes can be used in direct current motors or AC commutator motors or slip rings as sliding contacts for introducing current
Q:Why is an AC motor more popular than a direct current motor? System description, thank you.
When it comes to AC motor, said first alternating current, alternating current is often used in our daily life, low price, wide use, AC Alternating Current AC motor can adapt to any electrical equipment, is no exception, the reason is the three-phase alternating current of each phase is 120 degrees, 360 degrees, this is just a three-phase AC motor is welcome to good, so the AC motor will be popularized
Q:Why do motors need capacitance when they start?
A positive reverse circuit. The switch hits the top. "Yes" is to string the capacitor to the coil below. The switch "hit" below is the series of capacitors connected to the coil above. There is no need to consider the capacitor charging problem.

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