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FAQ

The laptop power adapter is burned

You this situation or the first adapter to try, it is likely that the adapter power shortage. If you change the adapter or so, then your problem is big, there may be your laptop to protect the isolation circuit and the charging circuit is a problem, in the insurance repair is free, if the insurance, and to be afraid of a little fear Small expensive, the adapter to buy a cottage on the line, as long as tens of dollars.

Jd1a-40 motor speed controller and how to connect the motor

Speed ??control motor wiring method: 3.4.5 is the terminal of the tachogenerator (U / V / W) from the right-to-left order of 1.2 for the excitation coil (F1 / F2) terminal, from the extended end of the speed motor (electromagnetic clutch) Master 7 plugs on the air plugs (governor): terminal 1.2 for the 220v input, 3.4 on the speed of the motor on the excitation coil, 5.6.7 speed motor on the tachogenerator. Motor speed control method: The speed regulating motor is to change the speed of the motor by using the series, voltage, current, frequency and so on of the motor to make the thyristor voltage regulation method the best.

Variable frequency conversion frequency difference characteristics based on,

Frequency conversion is better, you can smoothly change the synchronous speed. Change the difference is relatively poor, also known as "energy consumption slip" speed. Synchronous speed unchanged, the slip rate has changed, so the speed changed.

How to disassemble the notebook power adapter

. 2, the power adapter on the side of the lateral side of the white paper, with an electric knife blade along the power adapter under the cover between the gap cut, and then hit the electric knife knife with a hammer, so that the electric knife from the adapter between the upper and lower cover cut into. In the different positions of the gap between the upper and lower covers of the adapter, use the tip of the electric knife to be scratched along the gap. When the upper and lower covers are first split, the depth of the tool is deep and then the upper and lower covers of the adapter are separated

What is the characteristic of the variable pole speed method?

Seven, hydraulic coupler speed control method The hydraulic coupler is a hydraulic drive, generally composed of a pump wheel and a turbine, which collectively referred to as a working wheel and placed in a sealed housing. The shell is filled with a certain amount of working fluid, when the pump wheel in the prime mover driven under the rotation, in which the liquid by the blade to promote the rotation, under the action of centrifugal force along the outer ring into the turbine wheel, in the same direction to the Turbine blades are thrusted to drive the production machinery. The power transfer capacity of the hydraulic coupler is consistent with the size of the relative filling fluid in the shell. In the course of work, change the liquid filling rate can change the coupler's turbine speed, made stepless speed regulation, which is characterized by: power to adapt to a large range, from several tens of kilowatts to thousands of kilowatts to meet the different power needs; Simple, reliable, easy to use and maintenance, and low cost; small size, can accommodate large; easy to control and easy to achieve automatic control. This method is suitable for fan, pump speed.

Delta VFD-A frequency converter motor number of poles set

According to the actual needs of the motor To provide the required power supply voltage, and then to achieve the purpose of energy saving, speed control, in addition, the inverter there are many protection features, such as overcurrent, overvoltage, overload protection and so on. With the continuous improvement of industrial automation, frequency conversion The device has also been very widely used.

Laptop warranty period is not over, the power adapter is broken, repair money?

Warranty warranty, what is the warranty, that is broken, to ensure that free repair to you, repair bad on the new Dealers are not responsible for sale, need to go to a dedicated service network. Warranty period, should not be money. If the money, the first 800 to ask to say clearly

Why the notebook power adapter can not be universal

Third, the current is different Different brands of laptop power adapter current is not the same, for example: under normal circumstances IBM is 4.5A, Dell is 3.34A, Hp is 2.7A, Sony is 4.1A and so on. In fact, the same brand of laptop power adapter voltage and current are not the same. So, even if the same brand of notebook computers channeling with power adapter to confirm the voltage and current specifications.