LS power generation installs the switching power supply step

(1) The maintenance objectives are different Overcurrent is mainly used to maintain the inverter, whereas overload is mainly used to maintain the motor. Because the capacity of the inverter sometimes needs to be increased by one or even two gears than the capacity of the motor, in this case, the inverter is not necessarily overcurrent when the motor is overloaded. ...

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.

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 power automation drives are mainly for industrial enterprises and construction enterprises, including municipal, metallurgical, electric power, chemical and other power-oriented industrial enterprises, car, food and beverage, pharmaceutical and other professional enterprises, as well as OEM equipment manufacturing enterprises. ...

First, the main function of the braking unit In some applications, the need for rapid speed reduction, according to the principle of asynchronous motor, it can be known that if the slip is larger, the greater the torque, the same braking torque will increase with the increase of the speed reduction rate, so that the system speed reduction time is greatly shortened, and the energy feedback is greatly ...

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 ...

high-power Although some inverters are fan type inverters, but it is a low-power fan inverter, such an inverter does not have the effect of energy saving, and it is necessary to achieve energy saving must be a high-power inverter, in addition to the high-power fan inverter, it is necessary to meet its ...

1. The voltage level of the AC contactor should be the same as the load, and the type of contactor should be suitable for the load. 2. The accounting current of the load should be less than or equal to the additional working current of the contactor. The turn-on current of the contactor is greater than the starting current of the load, and the breaking current is greater than the load ...

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.

Due to the short circuit of the load, the failure of the self-oscillation circuit and the loss of control of the protection circuit, the switching power supply will cause the base of the switch tube to be unable to get the switching pulse and intermittent operation, which makes it difficult to locate the shortcomings of SMPS. The difficulty of the repair operation and the improper method will expand the shortcomings, constituting the phenomenon of continuous burning of the switch pipe, etc., ...

The main circuit is the power replacement part of the power supply for the asynchronous motor, and the main circuit of the inverter can be roughly divided into two categories: the voltage type is to change the DC of the voltage source to the communication of the DC port of the inverter, and the filter is the capacitor. The current type is to change the DC of the current source to the communication ...

Brake unit: The function of the braking unit is to turn on the energy-dissipating circuit when the voltage Ud of the DC circuit exceeds the specified limit (such as 660V or 710V), so that the DC circuit can release energy by thermal energy after passing through the braking resistor. The braking unit can be divided into built-in and external, the former is ...

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. ...

When using an inverter, a leakage maintainer must not be used. This is a major criterion for the use of frequency converters. Some users choose the corresponding leakage maintainer for the inverter when using the inverter. *The result is: the inverter moves together ...

The contactor is an automatic switch for industrial roofs to control its on/off with a button. The contactor consists of an electromagnetic coil, a static armature, a moving armature, a static contact, a moving contact and a fixing bracket. The principle is that when the electromagnetic coil of the contactor is connected to the communication electricity, a strong magnetic field will be generated to make the center of the coil ...

Inverter control method: low-voltage general frequency conversion output voltage is 380-650V, output power is 0.75-400kW, operating frequency is 0-400Hz, and its main circuit adopts AC-DC-AC circuit. Its control methods have gone through the following five generations. 1U/f=C sine pulse width modulation ...

1. Soft up The direct launch of the inverter motor has a serious impact on the power grid, and it will also have too high requirements for the capacity of the power grid, which is extremely unfavorable to the service life of equipment and power grid circuits. After the use of inverter to save energy, the use of inverter's speed regulation (V/F) function will make the starting current from a small ...

The DC reactor for the inverter is also called the flat wave reactor, which is connected in series in the DC bus (terminals P1 and P+). The main thing is to reduce the higher harmonic component of the input current and improve the power factor of the input power supply (to 0.95). This reactor can be used at the same time as the AC reactor, and the inverter has high power ...

An important difference between servo and frequency conversion is that frequency conversion can be without encoder, while servo must have an encoder for electronic commutation. 1. What the two have in common: The AC servo technology itself is to learn and apply the technology of frequency conversion, and the servo control of the DC motor is based on the ...

I/O Points: When discussing control systems, I/O points are a term that is often heard. It refers to the input/output point, I stands for INPUT, which refers to the input, and O stands for OUTPUT, which refers to the output. The inputs/outputs are for the control system, and the input refers to the ...