There are 4 groups of inverter acceleration and deceleration time, adjust each group?

It depends on which group you are using, generally the first group is the default, but many groups may be used when the program is running, and some of the inverter acceleration and deceleration time can be set with multi-function terminals, which one you use, you only need to adjust which, if you don't confirm it, you can also adjust it all, no harm.

When there are multiple speeds, each group needs to be adjusted, and the others only need to be set.

Yes, the first set of parameters is used by default.

The acceleration time is the time it takes for the output frequency to rise from 0 to the maximum frequency, and the deceleration time is the time it takes to drop from the maximum frequency to 0. Acceleration and deceleration times are usually determined by the rise and fall of the frequency setting signal. When the motor is accelerating, the rise rate set by the frequency must be limited to prevent overcurrent, and when decelerating, the fall rate must be limited to prevent overvoltage.

The acceleration time setting limits the acceleration current to below the overcurrent capacity of the inverter, so as not to cause the inverter to trip due to the overrun.

The deceleration time is set to prevent the smooth circuit voltage from being too large, and not to cause the regenerative overvoltage to stall and trip the inverter.

There are formulas for calculating acceleration and deceleration times, for example:

Taking the acceleration time of fans and pumps (square torque load) as an example, the calculation formula is:

The square of the given acceleration time gd multiplied by the maximum speed of the motor is 375 times the minimum acceleration torque.

where: given the acceleration time (s).

The square of gd --- the flywheel torque (of the square).

Minimum acceleration torque (

From the formula, it can be seen that the formula is complex, and some of the values in the formula are difficult to determine at the debugging site, so the calculation is difficult to be accurate, and it loses its guiding significance.

Therefore, in the debugging, it is often taken to set a long acceleration and deceleration time according to the load and experience, and observe whether there is an overcurrent and overvoltage alarm through the starting and stopping motors; Then, the acceleration and deceleration setting time is gradually shortened, and the optimal acceleration and deceleration time can be determined by repeating the operation several times according to the principle that no alarm occurs during operation.

The acceleration time of the inverter is the time it takes to accelerate the drive from the highest operating frequency. Deceleration time refers to the time required for the inverter to decelerate from the highest operating frequency. Because usually the inverter is running at full load, due to the actual use of the motor.

With the slippage, inertia and other factors of the load, even if the inverter has stopped the output, there will still be inertia force to rotate the motor shaft, and the required stopping position cannot be effectively reached. In this section, you can use the "Optimize Acceleration and Deceleration Setting" function of Delta inverter, inverter.

It can automatically adjust the acceleration and deceleration, which can effectively reduce the mechanical vibration of the load start and stop, and at the same time can automatically detect the small torque of the load, and will automatically accelerate the operation to the set frequency with the fastest acceleration time and the flattest starting power, and can automatically judge the negative when decelerating.

Under the premise of normal load, the motor will automatically stop running smoothly with the fastest deceleration time.

When the inverter deceleration time is set too small, it may cause the following problems:

1.Mechanical shock: If the deceleration time of the inverter is set too small, the motor will stop suddenly or decelerate sharply, resulting in the inertia and energy of the mechanical system cannot be reasonably released.

This can cause mechanical shocks, increase the risk of damage to mechanical parts, and even lead to equipment failure.

2.High Stress and Vibration: When the deceleration time is set too low, the motor and mechanical system may be subjected to high stress and vibration. These additional stresses and vibrations may cause fatigue and damage to equipment parts, shortening the life of the equipment.

3.Grid impact: The inverter feeds back high-frequency pulses to the grid when it slows down.

If the deceleration time is set too small to cause rapid deceleration, these high-frequency pulses may have adverse effects on the power grid, such as grid voltage fluctuations, harmonic interference, etc. This can lead to the failure or unplanned downtime of other electrical equipment.

4.Overvoltage and overcurrent: When the deceleration time is too short, the circuitry inside the inverter may not be able to consume the power in time, resulting in energy backflow or accumulation in the motor system.

This can lead to overvoltages and overcurrents in motors, internal components of AC drives, and power grids, and even dangers such as equipment burnout.

In order to avoid these problems, the deceleration time of the inverter should be reasonably set according to the actual application situation and equipment requirements. The deceleration time should be adjusted according to the load characteristics of the equipment, the inertial load and other factors to ensure the smooth operation of the mechanical system and protect the safety of the equipment and the power grid. It is best to set up and debug according to the equipment parameters and recommendations provided by the manufacturer.

Each application scenario may be slightly different, so you should carefully evaluate and ensure that the deceleration time is set appropriately. <>

In the case that the acceleration and deceleration time of the inverter is relatively short, it depends on the load

1. If the load is relatively light, there is no problem with the hail generally;

2. If the load is heavy, it may cause the inverter alarm (overcurrent, overload, etc.), in addition, in the case of a particularly heavy load, if the output of the inverter is not equipped with a braking resistor (or a braking unit + braking resistor), it is known that the inverter module of the inverter may be frequently damaged.

When the acceleration and deceleration time of the inverter is relatively short, it will lead to the following possible situations:

Motor overload: Short acceleration and deceleration times mean that the motor needs to complete the acceleration or deceleration process in a shorter time. If the load on the motor is large, it may cause the motor to be overloaded, which may affect its normal operation.

Mechanical shock: Short acceleration and deceleration times can cause shock to a mechanical system, especially if there are loose or unbalanced components in the system. This can lead to damage or malfunction of mechanical components.

The control system is unstable: in the case of short acceleration and deceleration time, the inverter needs to adjust the speed of the motor faster. If the response speed of the control system cannot keep up, it may cause the control system to be unstable, which will affect the operation of the motor.

Increased energy consumption: Short acceleration and deceleration times may cause the motor to start and stop frequently, which can increase energy consumption. In addition, large speed changes in the motor need to be completed in a short period of time, which may lead to a further increase in energy consumption.

In short, too short acceleration and deceleration time of the inverter may adversely affect the motor and system, so it is necessary to set the acceleration and deceleration time reasonably according to the specific situation in practical applications.

In the case that the acceleration and deceleration time of the inverter is relatively short, it depends on the load

1. If the load is relatively light, there is no problem with the hail generally;

2. If the load is heavy, it may cause the inverter alarm (overcurrent, overload, etc.), in addition, in the case of a particularly heavy load, if the output of the inverter is not equipped with a braking resistor (or a braking unit + braking resistor), it is known that the inverter module of the inverter may be frequently damaged.

To set the frequency converter with short acceleration and deceleration times, you can follow the steps below:

Enter the parameter setting interface of the inverter. This can usually be achieved by pressing the "Parameter Settings" button on the drive's panel or by using the drive's control software.

Locate the parameter setting for acceleration and deceleration time. This is usually referred to as "acceleration time" and "deceleration time", which may have different names in different inverter brands and models.

Set the acceleration and deceleration time to a shorter value. Depending on the specific application requirements, the appropriate values can be set according to the actual situation. Shorter acceleration and deceleration times can achieve faster start-stop and speed changes, but it can also lead to problems such as excessive mechanical load or vibration, so the pins need to be adjusted according to the specific situation.

Save the settings and test. After the setting is completed, save the parameter settings and test to observe whether the acceleration and deceleration of the inverter meet the expectations and whether it meets the actual needs.

It should be noted that setting a short acceleration and deceleration time may increase the load on the motor and mechanical equipment, which may have an impact on the life and stability of the equipment. Therefore, when setting up, it is necessary to comprehensively consider the characteristics of the equipment and the working environment to ensure safe and reliable operation. If you are unsure how to set it up, it is recommended to consult the manufacturer of the drive or a relevant professional.

In the case that the acceleration and deceleration time of the inverter is relatively short, it depends on the load

1. If the load is relatively light, there is no problem with the hail generally;

2. If the load is heavy, it may cause the inverter alarm (overcurrent, overload, etc.), in addition, in the case of a particularly heavy load, if the output of the inverter is not equipped with a braking resistor (or a braking unit + braking resistor), it is known that the inverter module of the inverter may be frequently damaged.

The inverter acceleration and deceleration time setting is too short and may have some impact on the inverter. When the deceleration time is set too short, the inverter needs to complete the acceleration or deceleration operation in a very short time, which may cause the circuitry and components of the inverter to be overloaded. Overload can cause damage or overheating of the drive, which in turn affects its performance and life.

In addition, setting the acceleration and deceleration time too short may also have an impact on the machine. Shorter acceleration and deceleration times may lead to increased inertial impact of mechanical equipment, which may damage equipment or cause mechanical failure.

Therefore, in order to protect the inverter and mechanical equipment, it is recommended to reasonably set the acceleration and deceleration of the inverter and the time according to the specific application requirements and equipment characteristics.

014 Acceleration and deceleration time setting of inverter (below) (with subtitles).

The acceleration time of 8 seconds refers to the time when the inverter rises from 0hz to 50hz, you are now going up from 30hz to 40hz, in fact, the inverter only needs to rise the frequency of 10hz, so the time is not 8 seconds, but about seconds.

8 50*(40-30)= seconds.

Acceleration time refers to the time from the lowest rpm to the highest rpm, so 8 seconds refers to the time from 0hz to 50hz, if your acceleration time is 50 seconds, then the time from 30hz to 40hz should be 10 seconds, and so on.

The inverter acceleration time is set to 8 seconds, which is equivalent to an acceleration time of 8 seconds from 0-50Hz.

The acceleration and deceleration time is the time from 0 to the highest speed and from the highest speed to 0.

It only rises to 40Hz in 8 seconds

But it's all from 0 to the frequency you set.

Not necessarily.

It should start from 0!

The motor is reduced from a relatively high speed to a relatively low speed, which is a process of reducing the output frequency of the inverter to achieve a deceleration purpose. For example, if we set the synchronous speed of the rotating magnetic field of a four-stage motor running at the rated speed to be 1500r min, the rotor speed at this time is 1440r min, which is the state before the deceleration, then, when the frequency drops to 45Hz, the moment of the initial decline, the synchronous speed of the rotating magnetic field immediately becomes 1350r min, and the electrical frequency changes very quickly, but the rotor of the motor has a large mechanical inertia. It cannot be stopped immediately, so the rotor speed remains at 1440r min. In this way, the rotor speed exceeds the synchronous speed, so that the motor becomes a generator, becomes a state of power generation, thus generating a large amount of current, increasing the DC voltage, once the DC voltage exceeds the set standard value, the inverter will trip because of the excessive voltage, so as to protect the safety of the capacitor.

You said it"After all, the motor has stopped, there is no current, and the reason why the motor continues to rotate is not inertia"This is the mode of inverter parking, generally there are deceleration parking, free parking and DC braking parking, if you use free parking is what you call this situation.

When decelerating, the time should also be set, because the inertia makes the motor continue to rotate, the DC circuit of the inverter will be overvoltage, and the deceleration time is set too short, and the overvoltage alarm will trip. If you need to stop quickly, sometimes you need to add a braking unit, and the braking resistor will consume this part of the energy.

The deceleration time is that when the motor is parked, the brake resistor is turned on.

1. The acceleration time of the inverter refers to the time when the output frequency is accelerated from 0 to the set frequency value (such as 30Hz), that is, the time for the motor to accelerate from stationary to the required frequency speed. The deceleration time is the opposite, the time required to decelerate from operating speed to 0.

2. If the acceleration time is too fast, it may overload the inverter and stop, usually around 10 15 seconds.

3. The deceleration time depends on the type of load, some mechanical systems do not allow sudden braking, and due to the inertia of the mechanical system, the speed must also be reduced to 0 within a suitable time

Acceleration and deceleration are designed according to different occasions such as environmental processes, and many industries still need to be applied.

For example, when accelerating, it is necessary to set the speed improvement process time reasonably according to the process or the load carried by the motor, so that the motor can accelerate stably and smoothly, so as to prolong the service life of the motor.

It's the same when decelerating, if you stop directly or the frequency slowly decreases, it's different, for example, my chain load is relatively large, if I stop the frequency all of a sudden, then it's easy to break my chain, and it doesn't take long. If I adjust the deceleration time and the frequency slowly stops it, the chain is relatively durable.