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Water resistance cabinet

Water resistance cabinet

Description

Water resistance cabinets, also known as water resistance, are also known as liquid resistance cabinets, and are widely used in China's major factories and mines. The water resistance is white, that is, the water resistor (also known as the liquid resistance cabinet). This technology originated in Japan at the very beginning. It was introduced to China in the first half of 1985. It has been widely used in large-space motors today, and it is more suitable for China's national conditions. Because the motor starts immediately, the starting current will exceed 7~8 times of the rated voltage of the motor. Usually, the volume of the upper-level transformer can't bear it. It is a very powerful motor. It must be modified to start the machine, otherwise it will lead to the transformer. Jump down

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Water resistance cabinets , also known as water resistance, are also known as liquid resistance cabinets, and are widely used in China's major factories and mines.

The water resistance is white, that is, the water resistor (also known as the liquid resistance cabinet). This technology originated in Japan at the very beginning. It was introduced to China in the first half of 1985. It has been widely used in large-space motors today, and it is more suitable for China's national conditions. Because the motor starts immediately, the starting current will exceed 7~8 times of the rated voltage of the motor. Usually, the volume of the upper-level transformer can't bear it. It is a very powerful motor. It must be modified to start the machine, otherwise it will lead to the transformer. Jumping down.

For the previous startup equipment, the key points are: varistor starting and frequency sensitive starting. The varistor starts to change the resistors that are connected to the motor according to the total number of switching resistors. Since the switching resistors are attributed to the step-variable shifting, the switching is very shocking at a moment. The frequency sensitive start is that the pulse current component is relatively large.

With the gradual development of technology, the water resistance of the development trend in the middle and late stages is initiated because it is attributed to the stepless adjustment, so the whole process is smoother and the advantages of converting the non-impact current are achieved.

Water resistance cabinet principle

In the motor rotor control loop of the controlled winding motor, a uniquely equipped lithium battery electrolyte is used as a resistor, and the resistance of the lithium battery electrolyte is adjusted according to the density value of the electrolyte and the spacing between the two boards is changed. In the whole process of starting, the characteristics of the motor mechanical equipment are considered from the beginning to the end, and the motor is evenly increased in speed under the condition of obtaining a large starting torque and a minimum starting current. When the starting is completed, the electrical switch is short-circuited to the motor rotor. Control loop.

The classification of water resistance cabinets is divided into two types of water resistance according to the different motors:

This is the rotor string water resistance, that is, the motor belongs to the wound motor, that is, the motor rotor control loop is not shorted. At this time, the soft start is gradually realized according to the resistance value of the motor rotor control loop in the whole process of starting the change.

The second is the stator string water resistance, that is, the motor belongs to the squirrel-cage type motor, that is, the motor rotor control circuit is short-circuited inside the motor. At this time, the soft start is gradually realized according to the resistance value of the motor stator control loop in the whole process of starting the change.

According to the different maintenance methods, it is divided into two kinds of water resistance: this is the temperature change resistance size, that is, during the whole process of starting, because the lithium battery electrolyte inside the liquid rises with the liquid temperature, the molecular structure of the lithium battery electrolyte The activity is aggravated, the resistance value is gradually reduced, and the voltage of the terminal is gradually changed to exceed the soft start purpose. Second, according to the lifting of the pole piece lift motor in the cabinet, change the spacing between the I/O pole pieces at the average speed, change the size of the resistance value, and gradually change the voltage of the machine terminal to make it exceed the soft start. In the case where the temperature changes the size of the resistor, the key is attributed to the series of series of water resistance products. If the resistance size is changed according to the pole piece lift motor, both the stator and the rotor string water resistance can be used.

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