Introduction of LS electric power contactors

1. AC synchronous motor: that is, the rotor is composed of permanent magnet data, so after rolling, with the change of the stator rotation magnetic field of the motor, the rotor also changes the speed of the response frequency, and the rotor speed = stator speed, so it is called "synchronization". ...

Due to poor contact of network connectors, or due to disturbance and other problems, DP networks that have been used for a long time may show a "transient disconnection" situation, that is, occasionally disconnected instantaneously, and quickly recover to normal. If OB86 is not downloaded, the CPU will stop during a transient outage. Now all over the option to download a ...

The communication control of the inverter is more complicated, so it is listed separately. The communication control of the inverter is a control method for the operation, speed regulation and status indication of the inverter through the communication interface of the inverter. ...

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 ...

The technical parameters of the inverter (Variable-frequency Drive, VFD) are divided into the input side and the output side. The technical parameters of the input side of the VFD include input voltage, number of phases and frequency; Output-side technical parameters include additional output voltage, additional current, additional capacity, capacity, frequency accuracy, etc.

First, the power supply problem 1. The power supply voltage is too high When the power supply voltage is too high, the motor back electromotive force, magnetic flux and magnetic flux density all increase. Since the magnitude of the iron loss is proportional to the square of the magnetic flux density, the iron loss increases, resulting in overheating of the core. And the increase in magnetic flux causes ...

1. Active power - in the process of generating and transmitting alternating current energy, the part of energy used to convert into electromagnetic methods is called active power 2. Reactive power - in the process of AC electric energy generation and transmission, it is used for electromagnetic field AC in the circuit.

LS Denden's low-voltage inverters provide optimal speed control in a variety of industrial sites, and are solutions that can demonstrate the completion of an automation system and have an epoch-making power saving effect. It includes four types of products: IGXA; S100; IS7; C100 series. ...

1. The power value of the inverter is the most suitable for the power value of the motor, so as to facilitate the operation of the inverter at a high power value. 2. When the power classification of the inverter is not the same as the power classification of the motor, the power of the inverter should be as much as possible.

"Servo" - the word derives from the Greece word for "slave". People want to treat the "servo mechanism" as a handy tame thing, and act in accordance with the requirements of the control signal. The rotor stands still until the signal comes; As soon as the signal arrives, the rotor rolls; When the signal disappears, the rotor can instantly ...

1. The operator panel is given The operator panel is a simple frequency setting method of the inverter, and the user can directly change the set rate of the inverter through the potentiometer, digital key or rising and descending keys on the inverter operator panel. The big advantage of the operator panel is that it is simple ...

1. Auxiliary contact: the contact mechanically linked with the main circuit of the circuit breaker and the closing mechanism is mainly used for the display of the circuit breaker and the closing status, and is connected to the control circuit of the circuit breaker through the opening and closing of the circuit breaker to control or interlock its related electrical appliances. For example, output to signal lights, relays, etc.

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 ...

1. The speed of the motor slows down, and the cause of the problem of sound disorder may occur in the electronic speed stabilization device and the motor itself. If there is no problem with the power supply, most of the motor itself has a problem. It can be repaired by replacing the new motor and dismantling and repairing the motor. Dismantling and repairing the motor ...

(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 ...

LS touchers are divided into AC touchers (voltage AC) and DC touchers (voltage DC), which are used in electricity, power distribution and consumption. Toucher broadly refers to the electrical appliances that use the current flowing through the coil to generate a magnetic field in industrial electricity, so that the contacts are closed, so as to control the load. ...

1. The power supply should be connected to the R, S, and T terminals at the input end of the inverter, and must not be connected to the output terminal (U, V, W) of the inverter, otherwise the inverter will be damaged. After wiring, it is necessary to clean the trivial wires, which may cause abnormalities, failures and problems, and it is necessary to always keep ...

Features of SUSOL series circuit breakers: It can be used as the main switch of electrical equipment, and the limit breaking ability is high, Icu=Ics Modular construction of circuit breakers: Tripper replacement (TS series) can be combined in a variety of combinations, such as ...

Although many relays, timers and counters are often used in the ladder diagram programs used by LS PLC, LS PLC does not have these hardware physically, but uses memory and program programming methods to make logic control modifications, and connects external machines through output components.

Inverter is an important drive material in modern industrial production, as a power equipment, it is working hard all the time, so its fault rate is very high, and the rapid processing of inverter faults, to ensure the continuity of industrial production, is every maintenance electrician and on-site debugging of electricians.