1. Repair the damage of the inverter rectifier block
The damage of the inverter rectifier bridge is also one of the common faults of the inverter, the inverter rectifier block in the early production is mainly diode rectifier, and now some rectifier blocks choose the rectifier mode of thyristor (voltage regulation and frequency modulation inverter).
Medium and high-power general inverter rectifier module is generally three-phase full-wave rectification, which undertakes the rectification of all output electrical energy of the inverter, which is easy to overheat and easy to break down, and after its damage, it will generally present the phenomenon that the inverter can not be powered, and the three-phase input or output terminal is low resistance (its resistance value reaches more than megaohms under normal times) or short circuit.
When replacing the rectifier block, it is required to evenly coat a layer of silicon with good heat transfer function on the contact surface with the heat sink, and then tighten the screw. If there is no rectifier block of the same type, it can be replaced by other types of rectifier block of the same capacity, and the fixing screw hole must be drilled and tapped from the beginning, and then installed and wired.
2. Inverter inverter module burnout repair
Medium and small inverters generally use three sets of IGTR (high-power transistor modules); Large-capacity models are selected to be connected in parallel with multiple sets of IGTR, so they should be tested one by one when measuring and inspecting. Damage to the IGTR can also cause the OC (+pA or +pd or +pn) protection function of the inverter to operate.
There are many reasons for damage to the inverter module: such as a short circuit caused by the output load; The load is too large, and the high current runs continuously; The load fluctuates a lot, resulting in excessive inrush current; Poor cooling fan effect; As a result, the temperature of the module is too high, resulting in problems such as module burnout, function deterioration, parameter changes, etc., resulting in abnormal output of the inverter.
3. The charging resistance of the inverter is easily damaged and repaired
The reasons for the damage of the charging resistance of the inverter are generally as follows: if the main circuit toucher is not well absorbed, the current time is too long and burns out; or the charging current is too large and burns out the resistor; Or because when the heavy load is started, the main circuit is energized and the RUN signal is turned on together, so that the charging resistance has to pass through the charging current and the load inverter current together, so it is easy to be burned out.
The characteristics of its damage are generally manifested as damage marks such as burning, blackening of the shell, and bursting. It can also be judged according to the multimeter to measure its resistance (the resistance value of the machine with different capacities is different, and the resistance value of the same model can be determined).
|
More on that
|
Sunland low-voltage SB70 inverter is used in position control
Sunland's low-voltage SB70 inverter integrates a high-precision rotor magnetic field directional vector control algorithm, with 250% instantaneous torque control capability. It has the original multi-form PLC operation function, which is especially suitable for industrial cleaning equipment and manufacturing equipment. Practical multi-speed function: two sets of parameters, can be rooted ...
|
|
Precautions for using inverter - Sunland inverter
A frequency converter (VFD) is an electrical energy control device that converts a power supply to another frequency by using the on-off effect of power semiconductor equipment. It can realize the soft start, frequency conversion speed regulation, improved operation accuracy, power factor, overcurrent/overvoltage/overload protection of AC asynchronous motor, etc.
|
|
Hope Sunland launched the new Hope800 series inverter
Hope Sunland Technology Co., Ltd. is a national key high-tech enterprise dedicated to the research and development of high, medium and low voltage frequency conversion technology and the design, development, production, sales and service of related products.
|
|
Sunland low-voltage inverter division series
1.HG1000 high-performance light-load intelligent inverter, the most cost-effective, the new series is widely used in medicine, food, packaging, cable, printing and dyeing, washing, centrifuge, dehydrator, sewage treatment, HVAC, constant pressure water supply, constant temperature control, flow control and other industries, such as fans and pumps, ...
|
|
Inverter-related knowledge - Senlan inverter
1. What does open-loop mean in the use of inverters?
The speed detector (PG) is installed on the motor equipment in operation, and the speed response of the actual speed is sent to the control equipment, which is called "closed loop", and the speed detector that does not use PG is called "open loop". Most general-purpose drives are open-loop ...
|
|
The difference between "braking" and "parking" of the inverter - Senlan
There are two ways to park a drive.
One way is called "free parking". It is to quickly "power off" the motor, so that the motor can slide and park by its own inertia force (OFF2 parking);
The other way is called "braking parking". So this "brake parking ...
|
|
The difference between soft starter and inverter - Sunland inverter
Soft starter is actually a motor control device with motor soft start, soft stop, light load energy saving and a variety of maintenance functions. First of all, it is a three-opposite parallel thyristor and its electronic control circuit connected in series between the power supply and the controlled motor. By manipulating the conduction of three opposite parallel thyristors ...
|
|
Commonly used motor protection method - Hope Sunland
1. Install a reactor at the output of the inverter: This method is the most commonly used, but it should be noted that this method has a certain effect on shorter cables (less than 30 meters), but sometimes the effect is not ideal.
2. In the inverter ...
|
|
The inverter controls the speed of the AC motor - Senland
The rotational speed of an induction AC motor (henceforth referred to as a motor) is approximately determined by the number of poles and frequency of the motor. The number of poles of the motor is fixed by the operating principle of the motor. Since the number of poles is not a successive value (a multiple of 2, e.g. 2,4,6), ...
|
|
Causes and solutions of inverter skipping current faults - Senlan
1. There is a short circuit to the ground in the output circuit of the inverter, you can check whether the wiring is correct and troubleshoot
2. If the motor parameters are incorrect, you can check the parameter settings and identify the parameters
3. The acceleration time is too short, and the acceleration time can be increased.
|
|
Sunland's measures to reduce inverter failure
According to the test, the service life of the inverter is halved for every 10°C increase in the operating ambient temperature. For this reason, in daily use, a reasonable maintenance cycle and guidelines should be formulated according to the actual operating environment and load characteristics of the inverter.
|
|
The correct wiring of the rail power supply
The rail-rail power supply is a kind of switching power supply that is installed through the rail-type device, which is mainly used to monitor the voltage, current, temperature and other different aspects of the equipment, so that it can play a good maintenance effect. This switching power supply has a variety of different characteristics such as small size and light weight, ...
|
|
How far apart is the motor from the inverter - Senlan inverter
The supplier of the supporting equipment of the inverter reminds you that the voltage waveform output by the inverter is similar to a sine wave, but not a real sine wave. Its waveform contains a large number of harmonic components, especially the higher harmonics will increase the output current of the inverter, causing the motor winding to heat up, and produce oscillation.
|
|
Analysis of soft start technology of asynchronous motor - Senland
The thyristor communicates the voltage regulation and soft starts
The communication and voltage regulation soft engine of the thyristor is mainly to change the connection method of the thyristor, and the traditional connection method is changed to connect to the three windings, so that the power supply of the thyristor is completed by the method of parallel connection. Thyristor soft starters have a strong ...
|
|
How to carry out electrical system commissioning quota? ——Sunland inverter
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 ...
|
|
Rapid selection method of low-voltage inverter - Sunland inverter
First, according to the classification and selection of inverters
1. Inverters can be divided into general-purpose inverters and special inverters.
2. General-purpose inverters are mainly used in: general fan pumps (referring to inverters that only drag a single fan or pump) loads, mechanical loads, and loads requiring high overloads.
|
|
The reason for the humming sound after the motor plus the frequency conversion governor - Senlan
The so-called "hum" sound, that is caused by the frequency of the inverter's output waveform carrier, generally if the inverter you use is a fixed carrier, at the moment the motor is screaming, the human ear is more stimulated, then you can adjust the carrier frequency (inverter skills manual function table ...
|
|
Inverter rectifier unit static detection mode
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...
|
|
The cause of the leakage problem of Sunland inverter
1. The cause of inverter leakage
According to the inverter to control the operation of the motor, the three-phase electricity is supplied to the inverter bridge (IGBT) through the filter capacitor through the rectification, and then the operation of the motor is controlled by the three-phase electricity with adjustable output frequency and voltage of the inverter.
We all know that the three-phase stator winding of the motor ...
|
|
Senlan inverter multi-stage speed parameter setting
The external terminals of the inverter, RH, RM, RL, are speed control terminals. Through the combination of these terminals, three-speed and seven-speed control can be completed. In addition, the other terminals can be redefined, and the fifteen-speed speed can be controlled.
...
|
|
Contact
working hours
