Universal inverters are characterized by their versatility. With the development of inverter technology and the continuous expansion of market demand, general-purpose inverters are also developing in two directions: low-cost simple general-purpose LS inverters and high-performance and multi-functional general-purpose inverters. They have the following characteristics:
1. Simple general-purpose inverter is a kind of general-purpose LS inverter that simplifies some system functions for the primary purpose of energy saving. It is mainly used in water pumps, electric fans, blowers and other occasions that do not require high speed regulation function of the system. And it has the advantages of small size and low price.
2. In the design process of high-performance general-purpose inverter, various requirements that may arise in the use of LS inverter are fully considered, and corresponding preparations have been made in terms of system software and hardware to meet these needs. When in use, the user can select the algorithm according to the load characteristics and set various parameters of the inverter, and can also select various spare options provided by the manufacturer according to the needs of the system to meet the special needs of the system. In addition to being able to be used in all the fields of use of simple inverters, high-performance multi-functional inverters are also widely used in elevators, CNC machine tools, electric vehicles and other occasions that have high requirements for the function of the speed regulation system.
Three: the general inverter is basically selected is a relatively simple circuit structure of the VVVF control method, compared with the VC method, in the torque control function is poorer. However, with the development of inverter technology, some manufacturers have launched the general LS inverter using VC to meet the needs of the increasingly competitive LS inverter market. This versatile universal inverter can be switched to "VVVF operation" or "VC operation" depending on the user's needs, but the price is on par with the general-purpose inverter of the VVVF method. Therefore, it is believed that with the development of power electronics skills and computing skills, the function-to-price ratio of inverters will continue to increase in the future.
|
More on that
|
Maintenance and maintenance method of electric motor - LS generates electricity
1. Look: The normal operation of the motor has a great relationship with the surrounding environment. Therefore, during the daily inspection, check the water leakage and dripping conditions around the motor (which will cause the low insulation of the motor to form a breakdown and cause burnout), and check whether the peripheral of the motor affects its ventilation and heat dissipation ring.
|
|
The internal accessory component of the circuit breaker - the power production circuit breaker
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.
|
|
Fault solution for three-phase asynchronous motor - LS power generation
1. The motor cannot roll after being energized, but there is no abnormal noise, no peculiar smell and smoke.
1. Cause of the problem: (1) The power supply is not connected (at least two phases are not connected); (2) Fuse blowing (at least two-phase blowing); (3) The overcurrent relay is adjusted too small; (4) The wiring of the control equipment is faulty.
2. Question ...
|
|
The main structure of LS power AC contactor
The operating principle of the contactor is: when the contactor coil is energized, the coil current will generate a magnetic field, and the generated magnetic field will make the static iron core attract the moving core with electromagnetic attraction, and drive the communication contactor point action, the normally closed contact is disconnected, and the normally open contact is closed, and the two are linked. When the coil is de-energized ...
|
|
The touch screen controls the inverter steps
1. The touch screen is controlled by PLC inverter
1. At present, the general control of the inverter needs to use PLC to communicate with the inverter, read the information of the inverter, and then the touch screen communicates with the PLC in order to complete the control of the inverter to start, stop, and monitor the operation of the inverter.
|
|
Summer maintenance and maintenance of inverter method - LS power generation
1. Check the running 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 chamber, which is generally between -5 °C and 40 °C. The temperature rise of the phase-shifting transformer should not exceed 130°C.
3. Prevent ...
|
|
The size of the contactor is selected by the type of contactor - LS produces electricity
1. Select the corresponding category of contactor according to the control object, operation times and application category of the contactor.
2. Select according to the rated voltage of the line at the application location.
3. Select the rated current of the main contact of the contactor according to the load capacity.
4. About the voltage level of the lead coil ...
|
|
Parameter setting of LS power inverter
Control method: i.e. speed control, rotation control, PID control or other methods. After adopting the control method, it is generally necessary to carry out static or dynamic identification according to the control accuracy and requirements. Low operating frequency: that is, the small speed of the motor running, when the motor is running at low speed, its heat dissipation function ...
|
|
Inverter failure and solution - power generation
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 ...
|
|
Electricity-producing permanent magnet AC contactor structure
The contactor is mainly composed of a drive system, a contact system, an arc extinguishing system and other parts.
1. Drive system: The drive system includes electronic modules, soft iron, and permanent magnets, which is an important part of the permanent magnet contactor.
|
|
LS static test to determine the fault of the inverter
Generally, the general-purpose inverter roughly includes the following parts: (1) rectifier circuit; (2) DC central circuit; (3) Inverter circuit; (4) Control circuit. The static test is mainly a test of the high-power transistors (power modules) of the rectifier circuit, DC center circuit and inverter circuit. Whole...
|
|
Inverter load test run step - LS power generation
1. Manually operate the work stop button of the inverter panel, investigate the work stop process of the motor and the display window of the inverter to see if there is any abnormal phenomenon.
2. If the inverter presents an overcurrent maintenance action during the process of starting P to abort the motor, ...
|
|
LS automatic gain adjustment for power generation
In fact, there are also options for automatic gain adjustment, which generally divide the control response into several levels, such as high echo, medium echo, and low echo, which can be set by the user according to actual needs.
Azimuth Share Buff:
1. Set the share gain of the azimuth ring adjuster;
2 ...
|
|
LS GTH, GTK series thermal relay models
Thermal Overload Relay GTH-22
GTH series: GTH-22, GTH-40, GTH-85, GTH-100, GTH-150, GTH-220,
GTH-400、GTH-600、GTH-12M、GTH-12MH、GTH-12M、GTH-MH
GTH series: GTH-22, GTH-40, GTH-85 ...
|
|
Models and features of LS Metasol series products
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
...
|
|
The difference between inverter and power saver - LS produces electricity
First, the frequency conversion skill is only one of the many power-saving skills, including voltage regulation and current limiting, power factor compensation, phased power regulation, frequency conversion, chopping, filtering, energy feedback and other skills, even if the power saver using the principle of frequency conversion is concerned, the frequency converter is only power-saving.
|
|
Introduction to the working principle of LS electric molded case circuit breaker
Molded case circuit breakers are also known as equipment circuit breakers, all parts are sealed in plastic housings, auxiliary contacts, undervoltage trippers and shunt trippers are modular. Because of the very compact structure, the molded case circuit breaker is basically impossible to maintain. It is mostly manually operated, and the large capacity ...
|
|
The five stages of mastery of PLC technology
One. Logical stage
The so-called logical stage is to be able to complete the general logical planning in the relay system, since it is a relay system, so the knowledge of power drag is the foundation of this stage. I personally summarize that the root of learning the relay system lies in the word "grab", the relay system ...
|
|
LS power generation installs the switching power supply step
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 inverter generates electricity through the principle of intermediate DC bus power supply - LS
Most of the inverter manufacturers produce traditional inverters, and their control systems and other power supplies are directly provided by single-phase or three-phase power grids. However, due to the increasing use of VFDs and servo motor amplifiers, a new power supply may emerge: powered by the central DC bus of the VFD. This electric ...
|
|
Contact
working hours
