Speed regulation method of explosion-proof winch

There are many ways to adjust the speed of the explosion-proof winch. The general classification is electric speed control and mechanical speed control. No matter which speed control method, it must meet the load requirements of the winch. The main manifestations are:

1.  Good speed regulation performance, that is, the motor can be adjusted in both electric and power generation conditions. The winch has a lowered load condition. At this time, the load reverses the motor to generate electricity. This is the biggest difference between the winch and other machinery that requires speed control. Because of this, many speed control devices can be used under electric motor conditions, but they are difficult to use. Used for winch drive, even if it is adopted, it forms a more complicated structure.
2.  Good low-speed stable operation performance. Due to the wide variation range of the load quality of the winch, in order to avoid falling lanes when transporting large equipment, lower speeds are often used, which requires the speed control equipment to work under a large slip.
3.  Simple structure, easy operation and high reliability. The following is a discussion of various speed regulation methods.

Electrically adjustable speed winch

1.1 The electronically controlled speed regulating winch is driven by the winding asynchronous motor, and the rotor circuit is connected in series with different resistors to change the output speed of the motor.

Features of this speed regulation method:

1.  The rotor resistance and contactor are all placed in the explosion-proof box. There are many explosion-proof boxes and occupy a large area of the cavity;
2.  During the speed adjustment process, the rotor resistance participates in the work, and the energy of the speed adjustment slip is all converted into the heat generation of the rotor resistance, because the explosion-proof box is difficult to dissipate heat, and it is difficult to run at low speed for a long time;
3.  When lowering the load, it should be equipped with dynamic braking. Also due to heat dissipation, it is difficult to lower the load at low speed.

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