The inverter used in industry is divided into two types: single-phase and three-phase, which is distinguished from the voltage supplied by the main circuit, which is the main circuit to be connected to RST three-phase 380 volt alternating current, and the output is connected to the UVW three-phase line to the motor; The single-phase is the main circuit access to the single-phase 220 volt LN alternating current, the output is the same as the UVW three-phase line to the motor, the inverter input between the main circuit and the power grid, need to pass through the air switch to connect the power supply to form protection, do not use the leakage protection switch, otherwise it will not be able to operate normally, because the leakage current of the inverter is very large. The output terminal of the inverter needs to be directly connected to the motor, and do not use devices such as contactors to be used in series, otherwise the motor operation may be unbalanced due to the voltage drop caused by the contact.
The control circuit of the inverter seems to have a lot of lines, and in practice it can be understood into two logics, one is the start-stop logic control, which is used to meet the starting and stopping requirements of the inverter, which can be controlled by the external I/O terminal, in short, it is a or two switch contacts input to the inverter, which can use self-locking buttons, PLC output points or self-protecting relay contacts to finish. Of course, you can also go through the buttons RUN and STOP on the panel to complete this start-stop logic, or through the upper computer such as a touchscreen industrial computer, and use the communication pattern to control. At present, most of the inverters on the market, the factory-set parameters are controlled by the buttons RUN and STOP on the panel to achieve this starting logic.
The other is the given logic of the frequency signal, which is a continuous analog quantity, and of course it can also be understood as a string of logical data. Factory parameters are often operated by the ↑↓ button on the surface, the common way is to connect an external 1-10K potentiometer, the two ends of the potentiometer are connected to the 10 volt positive pole and ground wire, take the center tap, so that the rotary potentiometer can output 0-10VDC voltage to the inverter, and the inverter will be given a frequency command of 0-50HZ. Of course, this analog quantity can also be given by the communication pattern of the high-level computer such as the potentiometer or touch screen of the inverter operation panel. There is also a multi-stage speed form given, for example, there are three ports H1H2H3 on the terminal, which can be combined to have 8 different frequency values to regulate the speed of the inverter.
Therefore, as long as the start and stop source and frequency source of the inverter are set, the inverter can operate normally, and the corresponding parameters on the clarification book of each inverter will be a little different, but the reason is the same.
Finally, you can also set some overload and overcurrent protection parameters, acceleration and deceleration time, frequency upper limit parameters, torque improvement parameters, as well as the starting frequency and other speed signal output scale, etc., depending on the practical equipment and working condition requirements to choose.
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Delta's B2 series servo motor parameter setting
Automatic:
P0-02 Drive Status Display Parameter Function: 07Motor Speed (r/min)
P1-01 Control form and control command input source setting parameter function: 02 Select S form (r/min)
P1-38: Zero speed detection accuracy (no response below set speed)
P1-4 ...
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Precautions for the operation of Delta servo motors
1) The AC servo motor works by means of a dedicated drive. Do not connect the commercial power supply (100/200V, 50/60Hz) directly to the line of the servo motor, otherwise the servo motor will not work properly and the servo motor will be permanently damaged.
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The gateway is connected to the Delta inverter
This example is an example of the equipment used to connect a Modbubs to Profinet gateway to a Delta inverter, and the equipment used is a Siemens 1200 PLC, a Delta inverter, and a DJI Modbus to Profinet gateway.
1、Mo ...
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How to quickly master Delta servo?
1: What is the difference between servo motor and general motor?
The biggest difference between servo motors and general motors is the motor rotor and reaction equipment. The surface of the servo motor rotor is pasted with a strong magnetic steel sheet, so that it can be produced by the stator coil.
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Do Delta thermostats have a "slope control" function?
Delta's thermostats are only available in the DTE series (variety 1.5 and above) with the "slope control" function.
Illustrate the following examples:
For example: PV=20°C, SV=100°C, slope 10.0°C/min
Then (100 – 20)/10.0 ...
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Precautions for long-term idle use of Delta inverter
If the inverter is to run the equipment again after being shelved for more than half a year, the probability of damage may be greatly increased due to many factors such as the placement environment, the service life of the inverter, and the load rate, and the failure usually presents the following problems:
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Safety precautions for Delta servo motors
Delta's servo motor system is planned for industrial use, and it is necessary to have a full understanding of the motor standards and operation manuals before operating the motor. For the safety of the operator and the mechanical equipment, and to ensure that the communication motor can be used correctly, please read this safety precaution before installing the machine.
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How to choose Delta's servo motor
When selecting a Delta servo motor, in principle, the selection should be based on the load conditions. There are two types of loads on the motor shaft, namely damping torque and inertial load. Both loads should be calculated correctly and their values should meet the following criteria:
1) When the machine is running with no load, in the whole speed range, Delta ...
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Identify the problem area of the inverter - Delta
In the process of inverter protection and maintenance, various problems are often encountered, such as field line problems, poor primary parameter settings or mechanical equipment shortcomings. If there is a defect in the inverter, how to distinguish which part of the problem is a little more detailed here.
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Misunderstandings in the application of Delta inverters
The capacity selection of the inverter is based on the rated power of the motor
Myth: The capacity selection of the inverter is based on the rated power of the motor
Compared with the electric motor, the price of the inverter governor is more expensive, so it is important to ensure that the ...
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Reduce the failure rate of Delta's inverters
Daily View Item 1:
Check whether the sound of the motor changes abnormally during operation, including whether there is vibration during the operation of the motor.
Project 2:
Check if the environment of the inverter unit has changed. For example, whether the ambient temperature is normal. Familiar with Delta's inverter ...
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Introduction to the inverter selection strategy - Delta inverter
1. Ability to adapt to the environment
1.1 Ability to adapt to grid voltage fluctuations
When the motor on the bus starts in a group, when the largest motor unit on the bus starts, the influence on the operation of the inverter, which is related to the input voltage fluctuation range parameters promised by the inverter.
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How to use a PC to control Delta's inverter
Problem Description:
How does Delta inverter use a PC to control it?
Solution(s):
The communication interface of Delta's inverter is based on RS485 and the ModBus communication pattern commonly used in the general industry for material handing.
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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 ...
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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 ...
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Inverter maintenance and accessories should be replaced regularly – Delta inverters
1. Before the inverter is energized
The temperature and humidity of the surrounding environment should be detected first. Too high a temperature will cause the inverter to overheat the alarm. When severe, it will directly lead to damage to the power supply device of the inverter and short circuit of the circuit; Excessive humidity of the air can lead to a direct short circuit inside the inverter. When the inverter is in operation ...
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The technical advantages of the three-axis positioner - Delta
1. The welding station is actively handed over, and the operator has been loading and unloading parts in a fixed position, which effectively reduces the labor and logistics intensity of the operator, and the welding products of the whole set of equipment have strong compatibility and strong automatic welding scalability.
2. All ...
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Delta's power supply series application considerations
(1) Considering that the power supply is inconsistent at the time of power-on, the load is short-circuited, and the rational load may present a reverse voltage, the output end of each power supply connected in series should be set up with two anti-parallel tubes, and the forward additional current of the two * tubes should not be less than the additional output current of the power supply, and the reverse breakdown voltage should not be less than ...
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Delta's DTK series thermostat product model
DTK4848C01 High brightness LCD display, 48*48, Pt resistor/thermocouple input, 4-20mA output, 1 alarm
DTK4848R01 High brightness LCD display, 48*48, Pt resistor/thermocouple input, relay output, 1 alarm
DTK4848V01 Highlight ...
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Analysis of the power-on trip problem of Delta inverter
In life and production, leakage switches are often used. But the inverter is not used much at some times. Most manufacturers often use leakage switches as the main switch when installing switches in the workshop. When the frequency conversion control is elected, the problem comes out, and the leakage switch is always tripped after a little moment...
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