Meaning and classification of LS Electronic Motor Relay (EMPR).

The method of vector control frequency conversion speed regulation is to change the stator current Ia, Ib, Ic of the asynchronous motor in the three-phase coordinate system, after the three-phase - two-phase change, equivalent to the communication current Ia1Ib1 under the two-phase static coordinate system, and then after the directional rotation according to the rotor magnetic field, it is equivalent to synchronous rotation sitting.

When using inverters, leakage protectors must not be used. This is a major principle of the use of frequency converters. Some users choose the corresponding leakage protector for the inverter when using the inverter. *The result is: the inverter moves together, the leakage protector acts, and the system can't ...

Metasol series MS (100A and below) products are newly launched and the primary product specifications: contactors, thermal relays, and center relays. Features: The body is small, the internal structure is sealed, and the safety factor is high ...

(1) Tripping LS electric molded case circuit breaker basically involves the tripping unit in the process of practical application, and the tripping is generally a thermomagnetic tripping or electronic tripping, and we must also understand this different tripping method in advance. In practice the application ...

AC asynchronous motors are widely used in all walks of life, and frequency converters and power frequency power supplies are often required to switch in the selection of frequency conversion speed control system. The primary types of switching are: fault switching and multi-machine system switching. In the process of operation of many production machinery, the motor is not allowed to stop ...

1. Install an appropriate reactor The input side and the output side of the inverter are connected in series with suitable reactors to absorb harmonics and increase the impedance of the power supply or load, so as to achieve the purpose of pressing harmonics to reduce electromagnetic radiation in the transmission process. After pressing the harmonic current, the power factor is changed from the original ...

In the use of soft starters, some users often have some wrong concepts: 1. It is believed that whether the motor can be started successfully is related to the function of the soft starter, and a good brand or even a foreign brand should be selected under heavy load. 2. When the motor is not ...

Power refers to the amount of work done by an object in a unit of time, i.e., power is a physical quantity that depicts how fast or slow work is done. The amount of work is constant, and the shorter the moment, the greater the power value. The formula for finding power is power = work/moment. Power is a physical quantity that characterizes the degree of work done fast or slow. Units made in the hour ...

The Viet Nam Professional Football League, sponsored by LS Group, began operations in June and is hosted by Viet Nam Professional Football Joint Stock Company. With the comeback of football events such as the Korea K League and the Bundesliga, more and more football events are also brewing to restart. ...

The first generation of LS inverter selects the voltage frequency ratio scalar control method, which carries out frequency conversion speed regulation according to the linear ratio determined by the equivalent circuit of the asynchronous motor. Voltage refers to the effective value of the fundamental wave, and changing U/f can only regulate the steady-state magnetic flux and torque of the motor, not to mention dynamic control. In order to improve the low ...

Standardized procedures for safe operation of generator sets 1. Preparation before starting (1) The operators of the computer room should abide by the safety operation procedures, wear work clothes and insulated shoes, and the crew should have a clear division of labor. (2) Check whether the flywheel and part of the generator are not defective. ...

Operating regulations for power inverters 　　Maintenance & Installation Work according to the weight of the product. The number of inverter boxes cannot be stacked in excess of the specified number. Install according to the user manual. Do not open the case during transport. Do not place ...

Change the shutdown mode to inertia parking and you're done! In this way, after the fan is stopped, the inverter will immediately turn off the output, so that the fan can stop freely, at this time, although the fan is in the power generation situation, but the electricity generated by the fan will not pass through the inverter of the inverter to generate direct current, so the inverter will not overvoltage ...

(1) This series is divided into two types: economic type and standard type, which can meet the requirements of different customers: Economical: 10/14/20/30 points (10/14 points with 2 built-in analog potentiometers), up to 70 points. Standard type: 20/30/40/60 point DR/DRT (2-axis position ...

1. Confirm the location of the device Before the equipment switches on and off the power supply, it is necessary to confirm the location of the equipment, and generally require the equipment to be in a ventilated, boring, non-corrosive gas and dust-free place. 2. Equipment holder The fixed base of the switching power supply is fixed on the orientation of the equipment, and the general ...

The relationship curve between the load rate β and the power η of the inverter can be seen: when β = 50%, η = 94%; When β = 100%, η = 96%. Although the β has doubled, the η change is only 2%, but it is also considerable for medium to high power (a few hundred kilowatts to several thousand kilowatts) electric motors. The system power is equal to the inverter power ...

The fundamental method of motor protector selection At present, there is no unified standard for motor protectors on the market, and almost every manufacturer has its own type standard. In order to meet the needs of different customers, manufacturers derive many products with different uses, and a wide range of products for the majority of users to choose ...

The PLC should be kept away from strong disturbance sources such as electric welding machines, high-power silicon rectifier equipment and large-scale power equipment, and cannot be installed in the same switch cabinet as high-voltage electrical appliances. Power line, control line and PLC power line and I/O line should be separated from the wiring, barrier transformer and PLC and I/O should be selected ...

From the point of view of application, the function that should be reached is: it is necessary to conduct the local area where the touch part should be conducted, and the touch is reliable. If the insulating part should not be conducted, it is necessary to insulate it firmly. There are three common types of faults in terminal blocks: ...

The rectified DC voltage of the rectifier contains the pulsating voltage of the power supply 6 times the frequency, and the pulsating current generated by the inverter also changes the DC voltage. The main power is the power replacement part of the power supply for the asynchronous motor voltage regulation and frequency modulation power supply, and the main power of the inverter can be roughly divided into two ...