In the electrical profession, the use and development of energy-saving frequency conversion is very good, which has promoted the electrical profession to reach the pinnacle of science and technology again. Frequency converter (VFD) has a very good development shape in China, but it still has to withstand various tests. As long as you give full play to your professional advantages, you can gain a firm foothold in this society. The development of VFD is highly valued by various professions.
VFD manufacturers and enterprises must make good use of the relatively knowledgeable talents in the enterprise, which is very important for the cultivation of talents. Judging from the current way of working in China, there is a serious shortage of independent inductive talents. If you can find such talents to participate in VFD careers, it is necessary to rationally use talents and strengthen enterprise management.
The development of VFD needs external support, especially the support of relevant parts of the country. With technical support, there is a motivation to carry out, and we must get the greatest support in the technical field, and reform the use strategy of VFD to the greatest limit, and then become an energy-saving VFD that is energy-saving and environmentally friendly. When developing and maintaining products, we must pay attention to energy consumption.
As for the future development prospects, the development prospects of VFD are very optimistic and have been widely valued. Vigorously carry out green environmental protection VFD has played a certain role in environmental protection, and has become the most practical development of the electrical profession. It has received strong support from various professions and the government, and will continue to promote the development of professions.
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Inverter overcurrent protection solution - Senlan
1. Causes of overcurrent
There are many reasons for the occurrence of overcurrent, including soft and hard problems.
1. Causes of soft failures
When the acceleration or deceleration time in the inverter parameters is set too short, and the motor power is heavy, it means that in the acceleration, the inverter's ...
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Inverter-related knowledge - Senlan inverter
1. What does open-loop mean in the use of inverters?
The speed detector (PG) is installed on the motor equipment in operation, and the speed response of the actual speed is sent to the control equipment, which is called "closed loop", and the speed detector that does not use PG is called "open loop". Most general-purpose drives are open-loop ...
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Failure of robot contactor and inverter - Senland
Robot contactors are noisy?
Cause:
It is likely that the joint contact surface of the contactor is uneven, and the surface is sand or rust. The result will constitute a phase loss, which will lead to the burnout of contactors, switch frequency conversion and other components.
Solution:
will control the ...
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Senlan inverter motor failure analysis
1. The motor slows down too slowly
1) If the deceleration time is set too long, reduce the deceleration time
2) Install a braking resistor
3) Add DC braking
2. The motor is overheated
1) The load is too large, and the practical moment has exceeded the ...
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Inverter control method for motor - Senlan
1. U/f stable control
U/f control is to change the voltage of the motor power supply together with changing the frequency of the motor power supply, so that the magnetic flux of the motor is kept constant, and the efficiency and power factor of the motor do not decrease within a wide range of speed regulation. Because it is to control the voltage and frequency ...
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Common problems in the use of inverter - Sunland inverter
1. Please explain the maintenance function of the inverter?
(1) After detecting the abnormal situation, the correction action will be carried out automatically, such as overcurrent loss rate prevention, regeneration overvoltage stall prevention.
(2) After detecting the abnormality, the PWM control signal of the power semiconductor device is closed, so that the motor can park automatically. As...
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The difference between a voltage signal and a current signal
The general voltage in industry is 0... 5(10)V or current 0(4)... 20mA is used as an analog signal transmission method, and it is also a method often used by program control machines. So what is the difference between the transmission method of voltage and current, and when to choose what method, the following will be briefly introduced.
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The difference between Sunland inverter and soft starter
What is a frequency converter?
The inverter is a converter that converts the communication electricity with fixed voltage and frequency into the communication electricity with variable voltage and frequency, which is called the inverter. It is mainly used in the local demand for speed regulation, and its output not only changes the voltage but also changes the frequency together; The soft engine is really ...
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Inverter control motor speed method - Senlan
1. Why can the rotation speed of the motor be changed freely?
The unit of motor rotation speed: r/min the number of rotations per minute, can also be expressed as rpm.
Example: 2-pole motor 50Hz3000 [r/min]
4-pole motor 50Hz1500[r/min]
Conclusion: The rotation of the motor ...
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Introduction to the inverter maintenance and energizing test - Senlan
First, the inverter is not repaired and the power test is tested
(1) Inverter repair test rectifier circuit
At the two ends of the inverter to detect the internal DC power supply, P and N ends, adjust the multimeter to the resistance RX10 gear, the red watch pen is connected to the P end, and the black watch pen is connected to R, S, T in turn.
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Introduction to inverter capacitors - Sunland inverter
1. The capacitance is generally indicated by "C" plus a number in the circuit (e.g., C25 indicates the capacitance numbered 25).
A capacitor is a component consisting of two metal films close to each other and separated by an insulating material in the center. The characteristic of the capacitor is mainly to communicate through the DC block. The size of the capacitance is ...
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Common maintenance methods of inverter - Senlan inverter
1. Step-by-step decreasing method
The so-called gradual reduction method is to gradually reduce the scale of the problem through the analysis of the problem phenomenon and the identification of measurement parameters, and finally implement it to the specific circuit or component that causes the problem. In essence, it is a certainty, a negation, a negation, a negation, a final ...
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Attention to the shortcomings of the inverter - hope Senlan
The wiring interval between the motor and the inverter is too long, causing the new motor to catch fire
Burn two new motors in a row! The output current and voltage of the inverter are balanced, the input voltage is balanced, the current is unstable, the fluctuation is 20%-50%, the inverter is burned off by a short circuit between 35Hz turns, the grid voltage is very stable, 720V, ...
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The inverter's requirements for the surrounding environment - Senlan
1) Operating temperature: The inverter is a high-power electronic component, which is simply affected by the operating temperature, and the general temperature requirement is 0 - 55. However, in order to ensure the safety and reliability of the operation, it is necessary to consider freeing up space when using, and it is best to control it below 40. The inverter generally requires the device to operate ...
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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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Sunland's measures to reduce inverter failure
According to the test, the service life of the inverter is halved for every 10°C increase in the operating ambient temperature. For this reason, in daily use, a reasonable maintenance cycle and guidelines should be formulated according to the actual operating environment and load characteristics of the inverter.
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Motor inspection and maintenance, motor problems - Senlan
1: In the operation of the motor, if dust, water stains and other debris enter its interior, it will constitute a short-circuit medium, which can damage the wire insulation layer, form an inter-turn short circuit, increase the current, increase the temperature and incinerate the motor. Therefore, dust, water stains and other debris should be prevented from entering the motor.
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Advantages of Sunland HOPE530 series inverter
Sunland HOPE530 series inverter is a high-performance, high-reliability intelligent controller, widely used in a variety of industrial occasions. It is easy to operate, diversified equipment and high quality, and has become one of the intelligent power control equipment trusted by users.
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Inverter water inlet maintenance method - Sunland inverter
The first step is not to turn on electricity! First open the inverter panel, wipe the inverter dry, and then use a hair dryer to dry the display, PC board, push board, power components, fans, etc., with 95% alcohol, scrub the components with 95% alcohol, and dry the hair dryer with cold air.
Step 2: After an hour, use alcohol ...
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The control performance standard of the inverter cabinet
The control specifications of the inverter cabinet include reliability, accuracy, safety, environmental habits and versatility, etc., which are important guarantees to ensure the normal operation and safe production of the inverter cabinet control system.
Reliability specification: The control system should have high reliability and can be used for a long time.
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