Communication control of inverter - power inverter

"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 ...

According to the requirements of safe, high-quality, reliable and economical operation of the production, transforming, transportation, distribution and use of electric energy in power plants and substations, the following electrical equipment is mainly included. 1. Primary equipment Directly involved in production, ...

1. No-load energizing test of inverter 1. Ground the grounding terminal of the inverter. 2. Connect the power input terminal of the inverter to the power supply through the leakage maintenance switch. 3. Check whether the factory display window of the inverter is normal, if it is incorrect, it should be reset.

1. Be "confident" It is necessary to fully understand the principles of some typical circuits and be familiar with them. Guangzhou Kewo Training Center believes that drawings are dead, and the thoughts in the head are alive, able to make analogies, able to reason, and able to touch analogies. For example, switching power supply is always inseparable from ...

Frequency given meaning and given method The speed of the motor can be changed by changing the output frequency of the inverter. In order to adjust the output frequency of the inverter, the inverter must supply the signal of the changed frequency, which is called the frequency given signal.

1 AC three-phase circuit a) Yellow for phase A, green for phase B, and red for phase C; b) Light and blue colors for the neutral line or neutral line; C) Yellow and green two-color wires are used for safety grounding wires. 2 AC circuits connected by twinax wires or stranded wires: red, black ...

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 ...

Step 1: If the motor can be completely separated from the load, in the case of a power failure, the motor is mechanically separated from the load, and the motor is allowed to rotate freely without load. Step 2: After powering on, select the VFD command source (F0-04) as the command channel of the operation panel. ...

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. HW problem This problem may be a fault unique to LG-IG5 series inverters, and the main causes are as follows: (1) Damage to the cooling fan. Due to the use of environmental and other factors, the friction of the fan bearing is too large, causing the fan load to be too large and showing H ...

Although many names such as 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 to do logic control and editing, and connects to external machines through output components.

LS inverter and LG inverter are the same, there is no difference between the two. LS inverter, the full name of LS AC inverter governor, after supplying a variety of configurations, converts direct current into communication power, and changes the general power supply ...

What is the reason why the contactor keeps engaging and disconnecting by pressing the start button after the AC contactor is energized? In my personal opinion, most of the situation is caused by the wrong coil voltage of the replacement AC contactor, or the purchase of ...

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: ...

1. Physical environment (1) Temperature factor Temperature has a huge impact on the lifetime and reliability of the electronic components inside the inverter. When using the inverter in a high operating temperature environment, it is necessary to take additional cooling measures to ensure that the ambient temperature is stable in the inverter.

1. Vibration circuit: the drainage-source and R4 of the main winding N1 and Q1 of the switching transformer are the channels for the working current of the power supply; R1 provides the starting current; The self-powered windings N2, D1, and C1 constitute the power supply voltage of the vibrating chip. The normal operation of these three links is the prerequisite for the power supply to vibrate.

1. As soon as the inverter of the heat exchange station is opened, the pressure transmitter jumps randomly; 2. Use the inverter to control the water supply, the pressure transformer is used as the signal to collect the pressure, and the pressure transformer is disturbed by the inverter; 3. When the inverter starts the motor, the voltage converter signal is unstable and beats violently; 4. Pressure transformer (4-20 ...

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.

1. The inverter can adjust the power of the motor and complete the variable speed operation of the motor, so as to achieve the purpose of saving electricity. For example, it is reflected in the centrifugal fan and water pump, when the centrifugal fan and water pump use the frequency converter, the operator can convert the frequency to regulate the speed, and can easily control the flow rate according to the need, so as to save ...

1. Trapezoidal stairs start from the horizontal line and end up with a vertical line (generally you can omit not to draw, only draw the left busbar). On the left side of each row is the junction combination, indicating the conditions that drive the logic coil, while the logic coil indicating the effect can only be connected to the bus on the right. The contact can not appear in the coil right ...