1. The rated current of the inverter is low
As mentioned above, when the rated current of some inverters is less than the rated current of the motor of the same capacity, the inverter with a larger gear should be considered according to the load condition of the motor.
2. The motor may be overloaded for a short time
Since the so-called "short moment" of the electric motor is related to the constant moment of heating. It can be as little as a few minutes, as much as tens of minutes. The overload capacity of the inverter is usually 150%, 1min. Compared to electric motors, it is equal to no overload ability. Therefore, if the motor may be overloaded during the think tank, the capacity of the inverter should be increased.
3. Those who have special requirements for acceleration and deceleration time
The length of the acceleration moment of the motor is a relative concept related to the size of the inertia. For example, the acceleration time of 5 seconds may be too short for loads with large inertia (GD2 large); However, it may be too long for loads with low inertia (small GD2).
In general, for loads that need to be started and stopped under heavy load conditions, increasing the capacity of the drive should be considered in the following situations:
(1) Those who require to be able to start and stop quickly;
(2) Those who jog more frequently.
4. Those with impact loads
For example, the electric motor and the load are combined by a clutch. Usually when the motor is already spinning, the load is also rotated due to the combination of the clutch. Obviously, at the moment when the clutch is just combined, the speed of the motor will decrease, the slip will increase, and the current will also increase, which may lead to overcurrent protection action. In view of this situation, the capacity of the inverter should be increased
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Delta's PLC-Based motion controller AX3 series
With the development of electronic semiconductor information technology, technologies such as the Internet of Things, big data, and cloud channels are showing a trend of hundreds of schools of thought, which also drives the rapid development of intelligent production. Intelligent production also puts forward new requirements for controllers: high speed, large capacity, miniaturization, networking...... In order to ...
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Delta-B series inverter inverter output module is damaged and the drive circuit is damaged
Delta-B series inverter inverter output module is damaged and the drive circuit is seriously damaged: the drive integrated circuit T250V or burst, or the output terminal and the power supply ground are short-circuited, the filter capacitor is sprayed, the regulator tube is broken down or open, the resistance is open or the resistance value increases, and the circuit board carbonization is damaged.
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Whether the inverter needs to be added to the line - Delta
The role of the "communication input reactor" of the inverter input device is mainly to improve the power factor of the communication power supply on the communication side of the input side; It is useful to eliminate the higher harmonics on the input side to avoid damage to other electrical equipment caused by voltage distortion; Eliminate the three-phase AC power phase ...
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Delta inverter braking resistor selection
1. The necessity of braking resistance
If the regenerative energy that occurs during deceleration and descent in the application is too large, there is a possibility that the voltage of the main circuit inside the inverter will rise, causing damage.
Due to the built-in overvoltage maintenance function in the inverter, the overvoltage of the main circuit (O ...
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The common sense principle of inverter - Delta inverter
The low-voltage fuse cannot be used as an overload maintenance for the motor.
It is necessary that the additional voltage of the fuse is greater than or equal to the operating voltage of the distribution line.
It is necessary for the additional current of the fuse to be greater than or equal to the additional current of the melt ...
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Precautions for initial installation of Delta inverters
Delta's inverters should be thoroughly inspected for the first time or after long-term installation. The items and methods of inspection are as follows:
1) Check whether the Delta inverter is damaged, whether the metal parts are rusty, and whether there is frost. If there is frost and condensation, it should be dried for 4 hours (60°C) or ...
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Delta servo system composition
The servo system is mainly composed of a servo controller, a drive circuit, a servo motor and the corresponding reaction testing equipment.
(1) Servo motor
Servo motor refers to the motor that controls the mechanical components in the servo system, and the servo motor has an encoder inside, which can respond to the movement in real time.
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The cause of the failure of the main power supply circuit of the inverter - Delta
We really talked a lot about the relevant knowledge of inverter repair, but we talked less about the main reasons for protecting the main power supply circuit. Then take a look at the introduction below:
When there is a fault in the main power supply circuit of the inverter, in addition to selecting each component to match the corresponding power, it should also ...
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How to use Delta's inverter operation
(1) When the speed of the motor is controlled by the Delta inverter, the noise and temperature rise of the motor are higher than that of the frequency of the motor. When the motor is running at low speed, because the speed of the motor blades is low, the temperature rise of the motor becomes high.
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Delta's inverter is automatically changed to manual setting
The converter is capable of manual and active switching:
1. The switching between the manual operating system and the DCS operating system is done by the transfer switch SA installed on the field operation tower, which has active, manual and ...
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Several veins of the inverter circuit - Delta inverter
1. Vibration circuit: the leakage-source and R4 of the main winding N1 and Q1 of the switching transformer are the channels of the power supply operation current; R1 provides the starting current; The self-powered windings N2, D1, and C1 constitute the power supply voltage of the vibrating chip. The normal operation of these three links is the prerequisite for the power supply to vibrate.
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How to wire the internal control and external control of Delta inverter
How to wire the internal control and external control of Delta's inverter?
Internal control: connect the main circuit power supply RST motor UVW, press the inverter panel to start and stop. Both the command source and the frequency frequency should be selected in the panel.
External ...
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The inverter has a built-in PLC function - Delta
PLC progressive scanning standard work preparation.
Abundant programming language: instruction statements; ladder diagram; SFC。
Abundant instruction statements: 45 instruction varieties, including 28 root instructions and 17 usage instructions.
350 step law capacity.
uS-level root directives ...
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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 ...
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Delta's key steps in inverter maintenance
First, the maintenance of the inverter must first check whether the sound in the operation of the motor is abnormal, including, whether the motor is in operation to form a sensation.
2. Check whether the natural environment of the inverter installation has changed. ...
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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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The inverter needs to prepare the braking resistance condition - Delta
The preparation of the braking resistor of the inverter is mainly to consume part of the energy on the DC bus capacitor through the braking resistor to prevent the capacitor voltage from being too high. Theoretically, if the capacitor stores a large amount of energy, it can be used to release it to drive the motor and prevent energy waste. However, the capacitance of the capacitor is ...
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The principle, composition and function of Delta's inverter
1. What is a Delta inverter?
Delta inverter is a device that converts the power supply (50Hz or 60Hz) into a communication power supply of various frequencies to realize the variable speed operation of the motor.
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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.
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How the components of the inverter work – Delta
1. Inverter element - rectifier
Since it is difficult to change the frequency of the communication sine wave in the form of communication, the first operation of the inverter is to convert the waveform into direct current. To make it look like an AC, it is relatively easy to operate the DC. The most important component of all inverters is a ...
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