Problem Description:
What is stall avoidance?
Solution(s):
If the given acceleration and deceleration time is too short, the output frequency of the inverter changes faster than the motor speed, and the inverter will stop working due to overcurrent, which is called stalling. In order for the motor to work properly, the frequency must be controlled by the amount of output current. Therefore, when the output current is too large, it is necessary to appropriately slow down the acceleration rate, which is called the stall avoidance function.
Problem Description:
What is the difference between the acceleration time and the deceleration time from the given Delta inverter and the inverter with the same acceleration and deceleration time?
Solution(s):
Regarding the use of speeding up and slowing down and the need to strictly require the production schedule, it is necessary to separate the given acceleration and deceleration. However, for the use of fan transmission, the acceleration and deceleration time is longer, so the acceleration and deceleration time can be given together.
|
More on that
|
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 ...
|
|
Precautions for long-term idle inverter - 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:
...
|
|
Post-inverter shutdown maintenance project – Delta
1. Use a vacuum cleaner with a plastic nozzle to completely clean the inside and outside of the inverter cabinet to ensure that there is no excessive dust around the equipment.
2. Check the ventilation and lighting of the inverter room, and the ventilation equipment can work normally.
3. Check the inverter ...
|
|
Consider the timing of increasing the capacity of the inverter - Delta inverter
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 electric motor ...
|
|
Important parameters of Delta inverters
The inverter is the pioneering work of Delta Automation, and it is also the largest selling product of Delta Automation. In the highly competitive market, Delta inverters have always maintained a strong growth momentum and made great achievements in the high-end product market and the economic product market. Delta continues to launch high-end products ...
|
|
Debugging Delta's inverter method
1. Acceleration and deceleration time
The acceleration and deceleration time is usually confirmed by the rise and fall of the frequency setting signal. In the commissioning of Delta inverters, it is often used to set a long acceleration and deceleration time according to the load and experience value, and the frequency rise rate of the motor must be constrained when it accelerates to avoid overcurrent. When slowing down, ...
|
|
Delta was awarded an "A" rating as a "Supply Chain Engagement Leader."
On February 10, CDP released its 2021 Supplier Engagement Rating; SER) As a result, Delta received the highest scores in key scoring items such as "Supply Chain Participation" (Note 1) and "Three Emissions in the Greenhouse Gas Field" (Note 2).
|
|
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.
...
|
|
Common problems of VFD control motors - Delta
Question 1. Why use a VFD to control the motor?
Speaking of this question, let's first take a brief look at these two devices. The motor is a rational load, which hinders the change of current, and a large change in current will occur when it is started. VFD, which is actually made up of a rectifier inverter circuit, ...
|
|
Inverter maintenance is easy to ignore the problem - Delta
1. After the inverter is repaired, the power number needs to be corrected, don't forget it
Generally, an inverter corresponds to a power number (also known as the number of horsepower), for example, a 75 kilowatt inverter is set under heavy load, and 100 kilowatts is set under light load. In this way, the customer will not use it to present ...
|
|
Excessive inverter capacity poses a hazard to electrical equipment – Delta
(1) The harmonic current will directly cause the additional heating of the motor, so that the stator of the motor will exceed the rated temperature rise of the motor itself, so that the rated output capacity of the motor will be greatly reduced.
(2) The current wave output of the inverter ...
|
|
Troubleshooting of small electromagnetic relay cores - Delta
The main problems of the iron core of the small electromagnetic relay are that the armature cannot be sucked after being electrified:
This may be due to broken coils, foreign matter between the moving and static cores, and low power supply voltage. It should be patched on a case-by-case basis.
When energized, the armature is noisy:
This may be because of the ...
|
|
Inverter Fault Repair Test Method - Delta
Static quizzes
1. Test the rectifier circuit
Find the P and N ends of the DC power supply inside the inverter, adjust the multimeter to the resistance X10 gear, connect the red watch rod to P, and separate the black watch rod to R, S, T. Instead, connect the black watch rod to the P...
|
|
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 ...
|
|
Delta's servo brake circuit wiring method
The wiring method of the braking circuit of the Delta servo is to short the brake resistor inside the driver at the P and C terminals of the Delta servo. The brake of the motor is directly connected to the external 24V drive, which is controlled by an external circuit.
Delta servo is developed according to the needs of customers who use different machinery; Provide a full range of ...
|
|
Precautions for transportation, installation and storage – Delta
1) When taking out or placing the servo motor, it is not possible to only pull the wire and drag the motor or only hold the rotating shaft core.
2) Do not hit the shaft directly, e.g. by tapping or hammering, as this may cause damage to the shaft and the encoder attached to the opposite side of the shaft.
3) Give the shaft core ...
|
|
Mitsubishi's MHIET energy storage system, Delta, helped to solve the problem
Battery Management Solution Factory - Delta released the Mitsubishi Heavy Industries Group's star product, Mitsubishi Heavy Industries Group's three-power transformer hybrid one-power transformer system, proposing a high-quality method. This power transformer system is currently used at Mitsubishi Electric Manufacturing Plant in Aihara City, Kanagawa Prefecture, Japan.
|
|
Measures to avoid soft failure of inverters - Delta
The ways to reduce the soft fault of the inverter are: 1. Detect the overvoltage and undervoltage of the inverter; 2. Detecting overcurrent is the most frequent phenomenon of frequency conversion alarm.
Generally, the overvoltage alarm is generally presented at the time of shutdown, and the primary reason is that the deceleration time is too short or the braking resistance and braking unit have ...
|
|
Selection of braking resistors for Delta inverters
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.
Because usually the inverter has a built-in overvoltage maintenance function, the main circuit overvoltage (O...
|
|
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 ...
|
|