With the rapid development of the national economy, the installed capacity of captive power plants and the planning of transmission and distribution networks have been expanding. After the power system fails, if the power supply cannot be quickly restored, it will cause huge economic losses and severe social impact. How to ensure the safety and stability of enterprises and long-term production is a problem that needs to be dealt with urgently. In October 2017, Hope Senlan was invited to participate in the national "large and medium-sized industrial enterprise electrical skills tour promotion activity" with the theme of "communication, innovation, improvement and win-win".
The planning of domestic industrial enterprises is getting bigger and bigger, and the internal power system structure of enterprises is becoming more and more chaotic. Due to natural, equipment and man-made factors, when the power system will inevitably fail, the reliability level of the inverter, as the production electrical equipment of the enterprise center, is the key to the continuous production and long-term operation of the entire enterprise.
During the meeting, Mr. Du Junming, deputy chief engineer of Hope Senlan, elaborated on how to select and use high and low voltage communication frequency conversion devices when the power quality of the power grid is poor; Combined with the voltage ride-through skills of the inverter, we discussed the anti-"shaking" treatment scheme of the inverter with the guests.
As a leading enterprise in the domestic inverter industry, Hope Senlan has a history of 20 years, and is one of the earliest enterprises engaged in the production and development of inverters in China, including high, medium and low voltage inverter related products. Twenty years of dedication and persistence have created the outstanding quality of Sunland. Driven by the central concept of "outstanding and boundless, unlimited expectations", Sunland's products have been widely used in electric power, metallurgy, cement, municipal, light industry, machinery manufacturing, petroleum, chemical industry and other occupations, and have been highly recognized by the majority of users for their stable operation, superior performance and obvious energy saving.
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Overload trip analysis of an inverter
The motor is able to rotate, but the operating current exceeds the rated value, which is called an overload. The fundamental reflection of overload is that although the current exceeds the rated value, the fluctuation of the excess is not large, and it generally does not constitute a large inrush current.
1. The main reason for overload
(1) Excessive mechanical load ...
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PLC and inverter connection control method - Senlan inverter
There are three connection control methods between PLC and inverter:
1. Use the analog output module of PLC to control the analog output module of the inverter The analog output module of the PLC outputs 0-5V voltage signal or 4-20mA current signal, which is used as the analog of the inverter.
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The reason for the humming sound after the motor plus the frequency conversion governor - Senlan
The so-called "hum" sound, that is caused by the frequency of the inverter's output waveform carrier, generally if the inverter you use is a fixed carrier, at the moment the motor is screaming, the human ear is more stimulated, then you can adjust the carrier frequency (inverter skills manual function table ...
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The reason for the explosion of the inverter module - Senlan inverter
1. Condensation The temperature difference in the workshop is large, and the inside of the inverter presents condensation.
2. Impact load. The load fluctuates greatly, and the output current of the inverter suddenly increases, resulting in module damage.
3. The inverter is overloaded in the start, ...
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Analysis of Sunland inverter fault anomaly
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Senlan SV1000 servo drive wearing parts replacement
The wearing parts of the driver mainly include electrolytic capacitors for filtering and cooling fans, and their service life is closely related to the environment and maintenance of the operation.
Depending on the operating moment, the user can determine whether a wear part needs to be replaced.
Cooling ...
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Characteristics of two-phase electric fan inverter - Sunland inverter
The digital signal processor is selected, and the work efficiency is higher
A good quality two-phase electric fan inverter uses a digital signal processor, which can make the work efficiency higher, that is, it may take 3 hours to complete the work, but now it only takes 2 hours to be able to...
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Senlan inverter selection principle
1. Select the inverter according to the load characteristics, such as the load is constant torque load, you can choose Siemens MM440 inverter, ABB ACS800 series inverter, etc.; If the load is a fan or pump load, you can choose Siemens MM430 inverter, ABB ACS510 series inverter, etc.
2、 ...
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Hope Sunland inverter application introduction
1. Motor control
The inverter is mainly used in the field of motor control, which can complete the speed control, torque control, and azimuth control of the motor. The inverter can adjust the speed and load of the motor according to the process requirements, which can improve the output power and quality.
2. Air conditioning refrigeration
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Sunland inverter maintenance and cleaning inspection method
There are many special faults, which come and go, looming, making it impossible to judge and deal with. At this time, you can clean the circuit board with water or alcohol, and brush off the dust and rust on the circuit board with a soft brush, especially pay attention to the solder joints are dense, and the circuit near the 0 volt copper layer is also ...
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PLC control belt conveyor soft start method
Belt conveyor is a kind of continuous conveyor, which is one of the main types of fixed or escorted cranes. Belt conveyor is the use of friction to convey the dynamic, with belts, steel belts, steel fiber belts and chemical fiber belts as a kind of compliance with the transmission of materials and traction operations.
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Precautions for starting electrical equipment after a long holiday - Senlan
1. Do a good job of moisture-proof operations, clean up water and oil stains on site, insist on the boring environment of electrical equipment, and pay attention to preventing the inverter from being exposed.
2. Do a good job of maintenance and maintenance, take advantage of the shutdown for maintenance, clean the frequency conversion dust, and clean the frequency conversion air duct; Tighten the frequency conversion cable joint to prevent loosening, ...
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Sunland inverter braking resistor connection
Assuming that the inverter has a built-in braking unit and additional braking resistors, it is important to pay attention to the correct wiring of the braking resistors. The braking resistor should be connected between the P terminal and the DB terminal, but not between the P terminal and the N terminal, otherwise the three-phase rectifier bridge will operate at full load when it is not working, resulting in the equipment being unable to ...
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Sunland low-voltage SB70 inverter is used in position control
Sunland's low-voltage SB70 inverter integrates a high-precision rotor magnetic field directional vector control algorithm, with 250% instantaneous torque control capability. It has the original multi-form PLC operation function, which is especially suitable for industrial cleaning equipment and manufacturing equipment. Practical multi-speed function: two sets of parameters, can be rooted ...
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Inverter rectifier unit static detection mode
The method of judging the damage of a power element in the rectifier part is to manipulate the single conductivity of the rectifier element, and the positive and negative resistance values should not be consistent when the static value is general, and the specific method is as follows:
The three-phase bridge rectifier of the rectifier part may be two...
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Hope Sunland grid-connected PV inverter
Grid-connected photovoltaic inverter is one of the core components of solar photovoltaic power generation system, the main types are: central inverter, modular inverter, micro inverter, DC ...
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Introduction to the wiring rules of Sunland inverter
It is necessary to separate the signal line from the power line: when using analog signals for long-distance control of the inverter, in order to reduce the disturbance of the analog amount from the inverter and other equipment, please separate the signal line of the control inverter from the strong current circuit (main circuit and sequential control circuit). Inverter ...
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Senlan direct torque control principle
The direct torque control (DTC) function of the inverter is another high-performance communication frequency conversion speed regulation system developed after vector control. In the mid-80s of the 20th century, the German scholar Depenbrock proposed the theory of direct torque control in 1985, and his idea was to combine the electric motor and the inverter.
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Senlan low-voltage inverter has four series of applications
1.SB200 fan pump special inverter, widely used in textile, printing and dyeing, washing, cable, packaging, machinery, ceramics, constant pressure water supply, constant temperature control or various OEM.
2.HG1000 high-performance light-load intelligent inverter ...
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The reason for adding a frequency converter to the crane control system - Senland
Prior to the introduction of frequency converters, overhead crane operators operated the cranes using contactor-based controls. For low-cycle cranes, the system is equipped with a single or two-speed motor. For cranes with higher load cycles, they use so-called wound rotor motors.
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