The main problems of the iron core of the small electromagnetic relay are that the armature cannot be sucked after being electrified: This may be due to broken coils, foreign matter between the moving and static cores, and low power supply voltage. It should be patched on a case-by-case basis. When energized, the armature is noisy: This may be because of the ...

(1) About the synchronous switching function. Now, in addition to the off-line UPS power supply with an additional output power of less than 500VA, the off-line UPS power supply with square wave output is still selected for conversion control without mains synchronization function, and all UPS power supplies with an output power of 1KVA and above are performing the conversion operation of mains power supply to inverter power supply.

The appearance of the instrument is a comprehensive product of a variety of science and technology, with a wide variety of varieties, wide application, and constantly updated, with a variety of classification methods. According to the intention and use of the use of the main measuring instrument, car appearance, tractor appearance, marine appearance, aviation appearance, navigation instruments, control instrument ...

In general, factory motors are based on the additional speed values obtained at a given power frequency voltage (380 V, 50 Hz). If 380V is not reached under actual operating conditions, e.g. as long as 300V, 50 Hz, the voltage is significantly undervoltaged. Fundamentally, it cannot reach the extra rev value, due to the ...

Most inverter brand products can rely on the heat of internal electrical components to remove moisture during normal use. If you don't use it for a long time, it's easy to get wet. The chip pins, penetrating resistors, capacitors, and inductor pins of the DIP package will be severely rusted or desoldered, resulting in on-resistance ...

1. Install AC reactor and DC reactor. When the capacity of the inverter is greater than 500kva in the distribution transformer, and the transformer capacity is more than 10 times the capacity of the inverter, an AC reactor is installed on the input side of the inverter. And when the output voltage of the distribution transformer is unbalanced and uneven in three phases ...

1. Visually inspect the UPS and battery (or other energy storage) equipment for obstacles, and properly cool the surrounding area. 2. Ensure that there is no abnormal operation or positive warning on the UPS panel, such as: overload or overdischarge of the battery close to it. 3. Check if there is battery corrosion or other shortcomings ...

The role of the "communication input reactor" of the inverter input device is mainly to improve the power factor of the communication power supply on the communication side of the input side; It is useful to eliminate the higher harmonics on the input side to avoid damage to other electrical equipment caused by voltage distortion; Eliminate the three-phase AC power phase ...

What are the benefits of inverter power correction? Many brands of inverter power boards, driver boards, and motherboards can be universal, as long as the type, volume, and hardware are the same, and the desired power and voltage value can be obtained by correcting the manufacturer's parameters.

As we all know, the inverter has many maintenance functions, such as overcurrent, overvoltage, overload maintenance and so on. With the continuous improvement of industrial automation, frequency converters have also been widely used. This article will explain to you how to use a multimeter to measure the quality of the inverter. Need...

1. Record the operation data and shortcomings of the Delta: The operation data of the Delta inverter and the motor should be recorded every day, including the output frequency, output current, output voltage, DC voltage inside the inverter, radiator temperature and other parameters, and compare them with reasonable data, so as to facilitate early detection of defects.

1. Dealing with harmonic problems The treatment of harmonic problems is to block the propagation path of the disturbance and press the higher harmonics on the source of the disturbance. Interception of the transmission of disturbances can be carried out in the following ways: 1) Intercept the common grounding wire, propagation and disturbance path, the grounding of the power line and the grounding of the control line ...

1. To switch the motor of the power frequency, the parking method is set to free parking, and it is important not to park softly 2. Intercept the contactor of the motor from the output end of the inverter, and the control stop button and the inverter parking button are the same composite button, that is, when the inverter is pressed, the inverter parking will be followed by the contactor line.

Reactors are also called inductors, and when a conductor is energized, a magnetic field will be generated in a certain space scale occupied by it, so all electrical conductors that can carry current have inductance in a general sense. However, the inductance of the energized long straight conductor is small, and the magnetic field generated is not strong, so the actual reactor is conductive.

The transformer DC resistance tester uses the 32-bit ARM core as the processing center to control the whole machine, actively complete the functions of self-calibration, current stabilization judgment, data processing, resistance value display, etc., and can measure the DC resistance of various types of transformers and transformers. ...

The inverter is equipped with a braking resistor, mainly to consume part of the energy on the DC bus capacitor through the braking resistor to avoid the voltage of the capacitor being too high. Theoretically, if the capacitor stores a lot of energy, it can be used to release it to drive the motor to avoid energy waste, but the capacity of the capacitor is limited.

Power transformers are used very frequently in daily livelihoods, in order to ensure the normal use of electricity, the safety and stability of the power transformer is the key point, once the transformer has a problem of prevention, it is necessary to quickly find out the cause and deal with it, take the transformer short circuit as an example, the damage caused by the insufficient treatment is ...

1. According to the requirements of the device parts, the method and the maintenance function are required, and the type of motor maintainer and its various maintenance action parameter settings are reasonably selected; 2. According to the requirements of the product instruction manual, the correct device should be connected correctly according to the purpose of each terminal, and the working power supply should be connected to the control ...

1. Check the operating status of the inverter, whether the voltage and current value during operation are within the normal range. 2. Carefully monitor and record the ambient temperature of the frequency conversion room, and the ambient temperature is generally between -10 °C and 40 °C. The temperature rise of the phase-shifting transformer should not exceed 130°C. 3. Avoid ...

1. One is a triode type photocoupler, such as PC816, PC817, 4N35, etc., which is commonly used in the output voltage sampling and error voltage amplification circuit of the switching power supply circuit, and is also used in the digital signal input loop of the inverter control terminal. The structure is the simplest, and the input side consists of a light-emitting two...

The communication interface of Delta's inverter is to use RS485 to cooperate with the ModBus communication format commonly used in the general industry for material handing, so as long as the general ModBus software is used, the PC can be used to read and write the materials of the drive. Furthermore...