4.5 Kw Solar Inverter

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FAQ

Laptop computer about electricity no electricity, is the power adapter problem?

This situation is definitely not about what power off, if it is really about electricity no electricity, then your laptop is a one-time shutdown, rather than the screen flashing. I think this situation is more like a laptop screen lamp problem. Is unlikely to be a power problem. The screen flashes from the surface that there may be enough current. If the adapter can not provide enough current for the notebook, then the notebook will be over-current protection, which automatically shut down. You can find an adapter with the same output voltage as your adapter, the output power is greater than or equal to your adapter other adapter, if the situation remains the same, then it is certainly the problem of the lamp. But the inferred will not be a power problem.

HP laptop power adapter how to open

Adapter is broken is difficult to repair, for a barThe common method is to insert the blade into the gap in the middle of the adapter and then pry open

2 pole 0.75 kW motor can increase the speed through the inverter?

2-pole motor speed of about 2900 r / min or so, 4-pole motor speed of about 1400 r / min or so, which are in the case of 50HZ,

What is the principle and implementation of the inverter?

AC inverter principle. It is the first AC current will be converted into direct current, and then use the electronic components of the DC switch. AC power. General power of the larger inverter with a thyristor. And set an adjustable frequency device. The frequency in a certain range adjustable . Used to control the number of revolutions of the motor. The number of revolutions can be adjusted within a certain range. The frequency converter is widely used in the speed regulation of AC motor. Frequency control technology is an important development direction of modern power transmission technology, with power electronics Technology development, exchange frequency conversion technology from theory to practice gradually mature. Inverter not only smooth speed, large range, high efficiency, start current is small, smooth operation, and energy saving effect is obvious. Therefore, the exchange frequency control has gradually replaced the traditional traditional slip speed, variable speed control, DC speed control system, more and more widely used in metallurgy, textile, printing and dyeing, smoke machine production lines and buildings, Water supply and other fields. Generally divided into rectifier circuit, flat wave circuit, control circuit, inverter circuit, and so on several major parts.

What are the differences and links between the soft starters and the frequency converters, and their respective principles and uses?

The frequency changer mainly consists of rectifying (alternating current direct current), filtering, re-rectifying (direct current alternating current), braking unit, driving unit, detecting unit micro-processing unit and so on. Motor asynchronous speed expression bit: N = 60 f (1-s) / p (1) Where n --- the speed of asynchronous motor; f --- the frequency of asynchronous motor; s --- motor slip; p --- motor pole pairs. From the formula (1) we can see that the output speed of the motor is related to the input power frequency, slip rate and the number of pole pairs of the motor. Therefore, the direct speed regulation mode of AC motor mainly has variable speed (adjustment P), rotor Resistance speed control or cascade speed or internal feedback motor (adjust s) and frequency control (adjust f) and so on. And we now use the most widely used is the frequency control, from the speed n is proportional to the frequency f, as long as the change in frequency f can change the motor speed, when the frequency f in the range of 0 ~ 50Hz, the motor speed adjustment range is very width. The inverter is to change the motor power frequency to achieve speed adjustment, is an ideal high efficiency, high performance speed control means.

Why the number of motor poles increased, the inverter capacity will increase

The number of poles of the motor is not directly related to the rated current, but the number of poles is larger and the power factor is lower and the rated current will be higher.

Inverter alarm a043, how is it

When a signal failure occurs, use the DTI board, if necessary, change P215. With P806 (Follow the parameter description) during operation can be converted to no encoder operation A043 is: n-actjump exceeds the allowable change speed of the speed encoder signal (P215) In addition, for the synchronous motor (P095 = 12): The motor speed is 2% higher than the inverter release time point. The inverter in the ready state can not exit. Check processing: Check if the cable is disconnected Check the tachometer to shield the ground Not only on the motor side but also on the inverter side The encoder cable does not allow disconnection Use only recommended encoders The encoder cable is not allowed to be laid with the power cable

Three sets of batteries (540V) DC power supply U / f inverter.

This is the reason for the battery characteristics, your group of easy to burn the battery discharge characteristics of the curve should not be partial to engage, so easy to burn. Ultimately it is your group of battery quality is relatively poor!