1. Overpressure leads to brake pipe breakdown. The so-called overvoltage of the inverter refers to the fact that the inverter voltage formed due to various reasons exceeds the additional voltage, which is concentrated in the DC voltage of the inverter DC bus. The overvoltage alarm generally appears at the time of shutdown, and its main ...

Energy storage elements are different, the voltage type energy storage element is a capacitor, and the current type is an inductor. In fact, the general inverter uses power electronic circuits, which is a process of communication to DC - DC energy storage - DC to communication. It is also often said that the rectifier link --〉 energy storage link --〉 inverter ring ...

1. When selecting the inverter, select the inverter with the appropriate control method according to the load characteristics In addition to the inverter manufacturing process, it is also important to choose which control method of the inverter. The control method of the inverter is mainly divided into two types: open-loop control and closed-loop control. In the meantime, the open-loop control method ...

The first step is to check whether the appearance of the inverter is defective, including whether the indicator light is in normal operation, whether the mission control function of the operation panel is complete, and carefully observe the appearance of the inverter under the operating condition, and do the corresponding recording operation; When repairing the inverter, check whether the voltage value and current value exceed the ...

1. Pole change logarithmic speed regulation method This speed regulation method is to change the number of stator poles of the cage motor by changing the connection method of the stator winding, so as to reach the intention of speed regulation; The wiring is simple, the control is convenient, and the price is low; It can be used in conjunction with pressure and speed regulation, electromagnetic slip clutch to obtain high efficiency ...

The voltage waveform output by the inverter is only similar to a sine wave, but not a real sine wave, and its waveform contains a large number of harmonic components. As we all know, the higher harmonics will increase the output current of the inverter, causing the motor winding to heat up.

1. The wires of the inverter control circuit should be strictly distinguished from the main circuit cable (power line) and placed separately. This effectively prevents the inverter's control circuit from being disturbed by harmonics in the inverter's main circuit. 2. To separate the connection of the inverter from the terminals or contacts of other control circuits, ...

a。 When the third harmonic and disturbance signals are severe, a barrier transformer can be used to eliminate the third harmonic and disturbance signals. b。 The use of barrier transformers can generate new neutrals and avoid the abnormal operation of equipment due to defective neutrals in the grid. ...

I often see many beginners tossing on the resistor when overhauling the circuit, and it is dismantling and welding, in fact, it is repaired a lot, as long as you understand the damage characteristics of the resistor, you don't have to bother. Resistors are the most numerous in electrical equipment ...

The acceleration time of the Reynolds inverter is the time required for the output frequency to rise from 0 to the high frequency, and the deceleration time is the time required to decrease from the high frequency to 0. Generally, the frequency converter uses the frequency setting signal to rise and fall to confirm the acceleration and deceleration time. The rise of the frequency setting must be limited when the motor accelerates.

First, the selection of inverter power The system power is equal to the product of the inverter power and the motor power, and the system power is higher only when both are operating at a higher power. From the perspective of power, when selecting the power of the inverter, we should pay attention to the following points: 1) ...

There are many kinds of components of the inverter, different components have different functions, and different components have different specializations! In addition to the composition and application of Aideley inverter, there are also key components of inverter to provide for the operation of inverter.

1. Select varieties according to the above series according to the purpose and requirements of use Note that the main circuit load type is strictly differentiated, whether it is DC or communication. The communication contactor is different from the DC contactor, and is only suitable for DC-1 to DC-5 loads when used for DC loads.

The inverter is an electric control equipment that uses frequency conversion technology and microelectronic technology to control and communicate the motor by changing the power supply frequency of the motor operation. The inverter is mainly composed of rectifier (AC to DC), filtering, inverter (DC to communication), braking unit, drive unit, detection unit ...

Rectifier circuit: rectify 50HZ communication power into direct current. Frequency conversion circuit: The rectified direct current is inverted into a variable frequency communication current. Control part: control the frequency of communication electricity output by the inverter circuit. Maintenance circuit: maintenance and blockage of overcurrent and phase loss ...

The motor itself: 1) The inner and outer rings of the bearing are too tightly cooperated. 2) There are problems with the shape and position tolerance of parts, such as the coaxiality of parts such as machine base, end cover, shaft and other parts is not good. 3) Improper selection of bearings. 4) The bearing is not smooth or the bearing is not clean, and there are impurities in the smooth grease. ...

According to the different degrees of short circuit, the inverter can display the short circuit of the SCF1 motor; SCF2 has an impedance short circuit; SCF3 is short-circuited to ground. Causes of the problem: insulation problems with the cable from the motor or inverter to the motor; current transformer fault; ...

Low pressure issues The VFD reports a low voltage glitch when the drive's DC link voltage drops below 62% of the nominal level at the high setting (480 Vac) and 50% of the nominal value at the low setting (400 Vac). The +10% and -15% voltage tolerances in most manuals are the ones that claim to be ...

1. The acceleration moment is too short. Theoretically, the longer the acceleration time, the stronger the load lifting capacity. If the acceleration time is set too short, some VFDs will show an overcurrent or overload, overtemperature alarm, while others will not, and will only be stuck in a certain frequency band. 2.The V/F ratio is too large Some of this ...

In the course of inverter repairs, if there is no significant damage to the hardware and the maximum torque of the VFD is usually less than the torque of the load increase. It means that the load capacity of the frequency conversion speed control equipment has decreased significantly. So how do you deal with this? ...

1. If the bearing is in good continuous rotation condition, it will emit a low whining or humming sound. Sharp hissing, squeaking and other irregular sounds often indicate that the bearing is in a bad continuous rotation condition. The sharp squeaky noise can be due to the formation of an inappropriately smooth ...