What is an inverter power supply? A variable frequency power supply converts the alternating current from the main power supply from AC→DC→AC to a pure sine wave. The output frequency and voltage can be adjusted within a specific range. Unlike the inverter governor used for the speed control of electric motors, it is also different from the general AC power supply. The aspiring AC power supply features frequency stability, voltage stability, zero internal resistance, and a pure sine wave (no distortion) of the voltage waveform. Variable frequency power supply is very close to the aspiring social AC power supply, so the advanced cultural development areas are increasingly using variable frequency power supply as a standard power supply, providing a superior grid environment for public utilities, which helps to objectively evaluate the functions of electrical equipment technology products. According to the different structures, there are two types of variable frequency power supplies, namely linear amplification and SPWM switching type.
What is a frequency converter? The inverter is composed of AC-DC-AC (modulated wave) and other circuits, and the standard name of the inverter is the inverter governor. Its output voltage waveform is a square wave pulse and multiple higher harmonic weights, and the voltage and frequency are not adjusted independently, but are proportionally changed, which cannot meet the AC power requirements. Generally, it cannot be used as a power supply, and is generally only used for speed conditioning of three-phase asynchronous motors.
Because the whole circuit of the variable frequency power supply is composed of information AC-DC-AC-filtering and other parts, the signal waveform of the output voltage and current is pure sine wave, making it an AC power supply system with social ambitions. It is very simple to carry out the power supply system of the AC power supply system that is close to the social aspirations.
The principle and main function of the inverter: The inverter is an electrical energy control device, which uses the on/off operation of power semiconductor equipment to convert the power of the industrial power supply into another frequency. It can be divided into AC-AC inverter and AC-DC-AC inverter. AC-AC drives are capable of converting alternating current directly into alternating current with variable frequency and voltage. The AC-DC-AC inverter first rectifies the alternating current into direct current through the rectifier, and then passes through the inverter to turn the DC power supply into alternating current with variable frequency and voltage.
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The difference between vector and general use of frequency converter
1. The control accuracy of the vector type is higher than that of the general type.
2. The vector type has a large output torque at low speed, which can make the motor get a larger starting torque, and is suitable for use in the occasion of heavy load starting, such as: high-power long belt, hoist, etc. If it is used in some of the more common fields ...
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Misunderstanding of the use of inverter - Senlan inverter
Poor choice
This should be the situation that friends have encountered the most in the Z, the situation of large horse-drawn carts and small horse-drawn carts is everywhere. The big horse-drawn trolley is not bad, at least there is no big problem in use, the most investment has been added, and the equipment can still operate normally; But the small horse-drawn cart ...
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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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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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Advantages of Senlan vector control system
Dynamic "fast response" DC motors are rectified constrained and excessively high di/dt is not allowed. The asynchronous motor is only constrained by the capacity of the inverter, and the multiple of the forced current can be very high, so the speed echoes quickly, generally reaching the millisecond level, which has surpassed the DC motor in terms of speed.
At low frequencies ...
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Causes and solutions of inverter skipping current faults - Senlan
1. There is a short circuit to the ground in the output circuit of the inverter, you can check whether the wiring is correct and troubleshoot
2. If the motor parameters are incorrect, you can check the parameter settings and identify the parameters
3. The acceleration time is too short, and the acceleration time can be increased.
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Introduction to the speed regulation mode of inverter motor - Senlan
1. Mechanical speed regulation form
There are three methods of mechanical speed regulation: electromagnetic clutch, hydraulic coupling, and viscous clutch. Among them, the hydraulic coupling device is widely used, that is, a hydraulic coupling device is connected in series between the motor and the load, and the concave and convex liquid level is used to adjust the hydraulic coupling between the motor and the load.
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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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Servo motor regular diagnosis and repair method - Senlan
1. Common faults of motor heating up too high or smoke motor
Causes: 1. Excessive load; 2. Two-phase operation; 3. Blocked air duct; 4. The working temperature is too high; 5. Interphase or inter-turn short circuit fault of motor stator winding; 6. Motor stator winding grounding device; 7. The power supply voltage is too high or too low;
Overhaul...
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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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Inverter control scheme for fan and water pump - Senlan inverter
There are many control methods for inverters for fans and pumps, which can be selected according to specific conditions. Here are a few common scenarios.
(1) Manual adjustment This is the simplest control method, that is, the operator instructs according to the instrument, ...
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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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Sunland inverter does not show fault repair
After inspection, the circuit board of the machine is composed of a fan switching power supply board, a control board with a switching power supply and a driving board, etc., the fan power supply and the control board operation power supply are independent of each other, the fan power supply output is normal, and the control board operation power supply is not output due to the problem.
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Hope Sunland inverter fault code
Hope Sunland inverter part of the fault code
Er.ocb (1) Overcurrent at the moment of starting: There is a short circuit inside the motor
There is a short circuit in the motor wiring
The starting voltage is too high
Check the motor and wiring
Check the motor wiring
Seek service
Check the torque ...
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Senlan inverter selection points
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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The reason why the inverter damaged the motor - Senlan
The presentation of inverters has brought a revolution to industrial automation control and motor energy saving. Industrial production is simply inseparable from the inverter, even in the daily livelihood, elevators, inverter air conditioning has become a part of the insistence, inverter from the beginning into all corners of production, subsistence. However...
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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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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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Commonly used motor protection method - Hope Sunland
1. Install a reactor at the output of the inverter: This method is the most commonly used, but it should be noted that this method has a certain effect on shorter cables (less than 30 meters), but sometimes the effect is not ideal.
2. In the inverter ...
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Control the hovering function operation and principle of the inverter - Sunland inverter
How does the hovering function of the inverter work?
When the speed of the asynchronous motor is 0, the encoder response is meaningless, and it needs to be converted to V/F control, and the frequency is set to 0; The voltage is set to 0 speed at which the motor promises to withstand the current at the moment ...
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