With the rapid development of the electronic and electrical industries, the demand for magnetic materials has promoted the world's huge industrial clusters. In the process of producing magnetic materials, many manufacturers are facing a great dilemma: the main producers of magnetic materials are mainly thyristor rectifier control furnaces such as bell furnaces and nitrogen rotary furnaces, which not only bring reactive power problems, resulting in low power factor, but also a lot of harmonics. Reactive power and harmonic power quality problems lead to problems such as increased loss, equipment frequency problems, and limited production capacity.
A manufacturer of magnetic materials recently reported such a problem to Delta:
In the process of production and operation, many harmonic currents and reactive currents generated by the furnace will be discharged in the power distribution system. The original power distribution system uses the traditional capacitance compensation method, so that the harmonic current of the system resonates and expands. As a result, the power of the distribution equipment system is seriously lost, the power of the equipment is reduced, and the life of the power distribution equipment is greatly reduced. At the same time, the reliability of power distribution of the system is also seriously threatened, resulting in a sharp increase in the maintenance cost and handling cost of the power distribution system, which greatly affects the production capacity and output power.
The heating furnace generates a lot of harmonic currents ih;
The harmonic current occurs △U=L · dih /dt on the line equivalent inductance L;
The input voltage of the furnace Uin < the grid voltage Us, the output power of the furnace becomes smaller, and the heating furnace temperature up to Tmax requires a long time, t1 > t2;
When the heating furnace is operating, the demand is heat exchange with air, and the power loss Q = K · △T when the heating furnace is heat exchanged, which can account for 2-5% according to the previous experience;
Harmonic current will form grid voltage distortion and instability, and then form frequent conditioning of electric heating equipment, resulting in waste of energy consumption of electric furnaces.
In the use of PQC in the magnetic industry, it not only improves the stability of the power distribution system and increases the production capacity, but also plays a certain role in energy saving, so that the factory can greatly save electricity costs and equipment maintenance.
Based on the above excellent governance effect, the operating power of power distribution equipment and the service life of electrical equipment (transformers, circuit breakers and other equipment) are greatly improved, the reliability of distribution equipment is added, and the production capacity is improved.
In this project, PQC on reactive power and harmonic control also played a certain role in energy saving, the transformer load is calculated evenly 100 furnaces per month, the uniform electricity cost is 1 yuan / kWh, in 10 days as a unit, PQC operation, each furnace consumes 2360 Kwh, when PQC exits, each furnace consumes 2485 kWh, after 20 days of testing, the comprehensive energy saving rate of the distribution system is counted:
|
More on that
|
Debugging method of Delta servo motor
1. Initialize parameters
Before wiring, initialize the parameters.
On the control card: select the control method; Reset the PID parameter to zero; When the control card is powered on, the enable signal is closed by acquiescence; Save this condition to make sure that the control card ...
|
|
Introduction and features of Delta PLC
Delta's programmable controllers, also known as Delta programmables, delta programmable controllers, delta programmable controllers, etc., are electronic devices specially designed by Delta for the industrial automation category to complete digital operations. Delta's PLC uses programmable memory to store execution logic inside it.
|
|
Instrument classification standard - Delta
The appearance of the instrument is a comprehensive product of a variety of science and technology, with a wide variety of varieties, wide application, and constantly updated, with a variety of classification methods. According to the intention and use of the use of the main measuring instrument, car appearance, tractor appearance, marine appearance, aviation appearance, navigation instruments, control instrument ...
|
|
Delta's inverter model selection
1. VFD-B series
This series has a variety of communication voltage standard model options, in addition to providing a variety of I/O signal functions, and can supply the appropriate current and voltage vector value according to the external load torque, to meet the needs of customers with high quality and low price.
...
|
|
Several common problems of Delta and their solutions
What is the stall prevention function of the inverter?
If the given acceleration time is too short, the output frequency of the inverter changes much more than the change of speed, and the inverter will jump due to the flow of overcurrent, and the free operation is stopped, which is stalling. In order to prevent stalling and keep the motor working, ...
|
|
Installation steps of the reducer - Delta
Correct installation, operation and maintenance of the reducer is an important part of ensuring the normal operation of mechanical equipment. Therefore, when you install a planetary reducer, it is necessary to carefully assemble and operate it in strict accordance with the following matters related to the operation of the device.
...
|
|
The reason why the circuit breakers of multiple stages trip together is Delta
Short-circuit maintenance (overload maintenance) is an important function of circuit breakers, and the reason why this function is achieved is that the circuit breaker senses the temperature in the circuit through a thermal iron plate. Once the temperature in the circuit is too high, it is transmitted to the mechanical mechanism in the circuit breaker for trip maintenance.
...
|
|
Delta's LOYTECIoT building management platform helps Yili Group reduce costs
Intelligent houses are selected with fully automatic automatic control systems to consider the diverse requirements of community owners, managers and users in housing management methods. In the new project of Yili Group's Food Science R&D Trend Management Center, under the framework of opening to the outside world, Damei has made use of Loytec ...
|
|
Requires an inverter speed control application – Delta
Inverter is a kind of speed regulation equipment, where is there a place to use motor speed regulation, especially asynchronous motor speed regulation, will use inverter, now it is mainly used in industrial equipment on a large scale, because the motor is the heart of industry, and three-phase asynchronous motor occupies the vast majority of the share, ...
|
|
Introduction to common models and parameters of Delta touch screens
There are many types of Delta contact screens, of course, the parameters of different types are different, and the most important product is DOP-B03S201. This product is a 4.3-inch screen, its aspect ratio is 16:9, the screen is made of TFT raw materials, and its resolution can reach 480X ...
|
|
Delta's soft starter component role
The soft starter is a device used to control the start and stop of the motor, which is composed of a number of components, including the soft starter controller, the soft starter conditioner, the soft starter power supply, the soft starter input and output module, the soft starter interface module, etc.
...
|
|
The function in the process of using the inverter cabinet - Delta
Inverter cabinet is an industrial control equipment that can be widely used in fire fighting, daily constant pressure water supply and drainage, agricultural sprinkler irrigation pipe network pressurization, urban music fountain active water supply control, HVAC cold and hot water circulation control and other occasions. In addition, it also has a variety of maintenance functions such as: short circuit, overload, phase loss, etc.
|
|
PLC Peripherals – Delta PLC
Programming equipment: simple programmer, most only accept mnemonic programming, and some can also be programmed graphically (such as Japan's Toshiba EX programmable controller). The cluttered one has a graphical programmer, which can be programmed in the trapezoidal language. Some also have dedicated computers that can be used for other ...
|
|
Cause of Servo Motor Failure – Delta
1. The motor is broken shaft
1. The cause of the problem
(1) Unreasonable mechanical design leads to excessive radial load force;
(2) The load end is stuck or severely overloaded;
(3) The motor and reducer are not centered when installed.
2. Eliminate problems
(1) Check the ...
|
|
In 2020, Delta once again won the Outstanding Human Resource Optimization Award
Not long ago, Delta was awarded the "2020 Excellence Award for Optimal Allocation of Human Resources Resources" by the Human Resource Management Service Project Organization "Future", which stood out from more than 5,000 companies. This is also the second time since 2018 that Delta has won this honor. Delta ...
|
|
Delta's various PLC series
At present, Delta PLC has ES, EX, EH2, PM, SA, SC, SS, SX, SV and other series. Each series of models has its own characteristics to meet different control requirements.
The ES series is cost-effective and can be controlled sequentially.
EX ...
|
|
Inverter acceleration and deceleration mode selection - Delta
Inverter acceleration form and deceleration form selection, also known as acceleration and deceleration curve selection. Generally, there are several forms of inverter, such as linear, S-shaped, semi-S-shaped, etc., and the characteristics and uses of each form are as follows:
1. Linear form
This form makes the inverter's ...
|
|
Delta inverter fault alarm code and solution
The OCC AC motor driver detects an unusual overcurrent surge on the output side
See if the motor extra matches the communication motor drive extra
Check whether there is a short circuit between the communication motor driver U-V-W
View...
|
|
Principles of daily protection and maintenance of Delta inverters
1. Record the operation data and shortcomings of the Delta: The operation data of the Delta inverter and the motor should be recorded every day, including the output frequency, output current, output voltage, DC voltage inside the inverter, radiator temperature and other parameters, and compare them with reasonable data, so as to facilitate early detection of defects.
|
|
Synchronous control parameter setting method for two or more inverters - Delta
Step 1
Two inverters, two wires, and one power supply.
Step 2
The inverter wiring defines the two inverters as a master and a slave respectively, the host port 485A is connected to the slave port 485A, and the host port 485B is connected to the slave port 485B.
...
|
|
Contact
working hours
