LS Power Information SHOW

	LS power terminal is faulty From the perspective of application, the function of the terminal block should be achieved: the contact part should be conducted, and the contact should be reliable. The insulating parts should not be conducted, and it is necessary to insulate them firmly. There are three common forms of fatal failure of terminal blocks: ...
	Contactors play a role in industrial electricity 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 ...
	Failure analysis of electromagnetic system of LS power production contactor (1) The core noise is large: it is normal for the electromagnetic system to produce a slight humming sound during operation, if the sound is too loud or abnormal, it can be judged that the electromagnetic system has a problem, and there are three reasons: (1) Poor contact between the armature and the core or tilting of the armature. After repeated collisions between the touch of the armature and the core, ...
	The main part of LS power inverter is composed The inverter circuit is the first part of the inverter The function of the DC central circuit is to smooth the output of the rectifier circuit to ensure that the inverter circuit and the control power supply can obtain a DC power supply with higher quality. When the rectifier circuit is the voltage flow of the central circuit, the primary component is the electrolysis of Darongtong ...
	Introduction to the matching of LS power inverter loads 1. Square torque load Fan and pump loads are the most widely used equipment in industrial sites, and frequency converters are used in this type of load. It is a square torque load. In general, inverters with U/f=const control mode can be satisfied with the ...
	The matrix alternating control mode of the inverter - LS power generation VVVF frequency conversion, vector control frequency conversion, and direct torque control frequency conversion are all one of the AC-DC-AC frequency conversion. One of the disadvantages is that the input power factor is low, the harmonic current is large, the DC circuit needs a large energy storage capacitor, and the regenerative energy cannot be reflected back to the grid, that is, it cannot carry out four-quadrant operation.
	The difference between input reactor and output reactor – LS produces electricity The rectifier part of the general inverter selects the diode uncontrollable bridge rectifier circuit, and the middle filter part selects the large capacitor as the filter, so the input current of the rectifier is actually the charging current of the capacitor, and the harmonic component is relatively steep and steep.
	Cycloidal reducer transmission system testing - LS power production With the support of data processing, signal analysis and computer skills, the transmission system uses dynamic error detection equipment, starting from the measurement of time domain error information, and the internal dynamic test of the transmission system should include the following aspects. ...
	Selection of the color of the conductor of the high and low voltage switchgear - LS power production 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 ...
	The difference between inverter and servo - LS produces electricity 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 skill of communication servo itself is the learning and application of ...
	The choice of inverter power - LS produces electricity 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.
	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 ...
	Distinguish between good and bad inverters - LS produces electricity The quality of a thing is relatively speaking, the inverter as a power supply used to drive the motor to run, its function is to regulate the speed, under the premise of normal wiring, reasonable parameters, and no fault with the load, if the speed of the motor can be controlled according to the requirements, the shaking error is less than the equipment ...
	Selection of AC contactors in the field of building electrical - LS power production 1. The series and parallel connection application of contactors Many electrical equipment are single-phase loads, so several poles of multi-pole contactors can be used in parallel. Such as resistance furnaces, welding transformers, etc. When using several poles in parallel, a smaller capacity contactor can be used. However, it must be noted that after parallel ...
	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 ...
	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 ...
	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, ...
	Safety precautions for LS inverters 1. When the power supply is now powered or the inverter is in operation, do not open the shell of the inverter. Otherwise, an electric shock may occur. 2. When the front cover of the inverter is opened, do not run the inverter. Otherwise, you may be subjected to ...
	LS produces common sense of electroplastic case circuit breaker (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 ...
	Calculation method of filter capacitance value of inverter Alternating current can be converted into direct current using rectifier electricity, but in three-phase electricity, this DC voltage or current contains voltage or current ripple with a frequency of six times the frequency of the power supply. In addition, the inverter inverter will also generate ripple voltage or current due to output and carrier frequency, etc., and reverse ...
	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 ...