The manufacturing standard of Sunland inverter cabinet

(1). Constant torque load Different speeds, load resistance and torque base are stable. The output power is directly proportional to the rotational speed. Such as belt conveyors. (2). Constant power load Different speeds, stable load power base ...

1. The power supply voltage is low The solution is to preset the active voltage adjustment function of the inverter, so that when the frequency is low and the rated frequency is dry, the inverter has the function of active voltage stabilization, and if the output voltage is low, the inverter will actively increase the output voltage ...

When we have selected a suitable Variable-frequency Drive (VFD), we also need to consider whether we need to equip other peripheral equipment according to the actual situation of the site. The peripheral equipment selected by VFD mainly includes circuit breakers, reactors, contactors, braking resistors, etc. ...

1. Why can the rotation speed of the motor be changed freely? The unit of motor rotation speed: r/min the number of rotations per minute, can also be expressed as rpm. Example: 2-pole motor 50Hz3000 [r/min] 4-pole motor 50Hz1500[r/min] Conclusion: The rotation of the motor ...

The essence of energy feedback is active inverter, and the realization method of energy feedback of general inverter is to feed renewable energy to the grid with an anti-parallel three-phase inverter at the uncontrolled rectification of the pre-stage of the general inverter. The main circuit of the energy feedback equipment is mainly composed of thyristors, IGBTs and IPM modules.

When the line power supply exceeds the driver's kV-A rating by 10 times, add a line reactor. A 3% impedance line reactor should be used to reduce power line transient voltages caused by capacitor switching, line notching, DC bus overvoltage tripping, and inverter overcurrent and overvoltage conditions. Line...

In the process of operation, try to ensure that the inverter (hereinafter referred to as -VFD) has a satisfactory acceleration and deceleration time, and the VFD has its own soft start function when starting or accelerating; When the power is shut down or the speed is slowed down, it has the function of soft shutdown. Add acceleration and deceleration times as much as possible within the range promised by the device. When the device requires ...

In general, there is a problem with the maintenance trip of the VFD. If you look at the faulty code, you can see what kind of fault is causing it. 1. The selection talent of VFD may be too small; Generally, when selecting VFD, it should be about 20% larger than the rated power of the motor, so that when the motor reaches full load...

The method of judging the damage of a power element in the rectifier part is to manipulate the single conductivity of the rectifier element, and the positive and negative resistance values should not be consistent when the static value is general, and the specific method is as follows: The three-phase bridge rectifier of the rectifier part may be two...

How to distinguish where the inverter is wrong? Step 1: Static data checking 1. Check the inverter circuit The red watch rod is received to the P end, and the black watch rod is separated from U, V, and W, and there should be a resistance value of tens of ohms, and the resistance value base of each phase, the same, the opposite should be infinite.

If the drive has a built-in braking unit and additional braking resistors, it is important to pay attention to the correct wiring of the braking resistors. The braking resistor should be connected between the P terminal and the DB terminal, but not between the P terminal and the N terminal, otherwise the three-phase rectifier bridge will operate at full load when it is not running, resulting in the equipment can not be ...

1. Make proper grounding After a detailed investigation of the site, we can see that the grounding situation on the site is not very ambitious. The correct grounding can not only be useful for the system to press the external disturbance, but also to reduce the disturbance of the equipment itself to the outside world, which is the most useful for dealing with the disturbance of the inverter.

The inverter is an essential accessory in industrial use, and its main function is to regulate the speed of the motor. It is widely used in various equipment such as production F-line and machine tools. Many engineering people have touches. The functions of the inverter are many, the parameters are complex, and it is difficult to play without professionals. ...

1. Discrimination The inverter power module mainly includes IGBT, IPM, etc., check whether the appearance has exploded, and whether there are ablation marks between the terminal and the connected printed board. Use a multimeter to check whether C-E, G-C, G-E have been passed, or use a multimeter to measure whether the resistance of P to U, V, W and N to U, V, W is inadequate.

The commissioning of the electrical system refers to the commissioning of the entire high and low voltage system. The power supply commissioning of civil electrical projects such as general residences, schools, office buildings, hotels, and shops shall be carried out in accordance with the following provisions: (1) About the commissioning of the belt in the distribution room ...

At present, the domestic air compressor market takes the goal of energy saving, environmental protection and cost reduction as the primary demand, and the new products developed are very popular. However, economically speaking, it cannot completely replace the conventional screw air compressor with large area and large capacity in use. Therefore, the use of inverter technology to ...

1. Causes of overcurrent There are many reasons for the occurrence of overcurrent, including soft and hard problems. 1. Causes of soft failures When the acceleration or deceleration time in the inverter parameters is set too short, and the motor power is heavy, it means that in the acceleration, the inverter's ...

In some fields, the use of inverter to control the motor will present the problem of leakage, and the leakage voltage ranges from tens of volts to 200 volts. According to the inverter control motor ...

1. Plan a special inverter room When the power of the inverter is large or the number is large, a special inverter room can be planned. The doors, windows and cable holes in the room need to be sealed to avoid dust ingress; It is necessary to plan air filtration equipment and circulation channels to adhere to the normal indoor air ...

If you want to make the inverter last a long time, you must seriously consider the problem of heat dissipation. Because the failure rate of the inverter increases exponentially with the increase of temperature, the service life decreases exponentially with the increase of temperature. A 10 degree increase in ambient temperature halves the service life of the inverter. Thus...