What are the basic parameters of inverter setting?

What are the basic parameters of inverter setting? Start data, select command source, frequency given source, maximum frequency, minimum frequency, acceleration and deceleration time, V/F curve.

There are many functional parameters of frequency converter, generally there are dozens or even hundreds of parameters for users to choose from. In practical application, it is not necessary to set and debug every parameter, and most parameters only use factory setting values. However, some parameters are closely related to the actual use, and some are interrelated, which should be set and debugged according to the actual situation.

Because the functions of various types of inverters are different, and the names of the same functional parameters are different, for the convenience of description, this paper takes the basic parameter names of Fuji inverter as an example. Because the basic parameters are available in almost all types of frequency converters, it can be completely bypassed.

Acceleration and deceleration time

The acceleration time is the time required for the output frequency to rise from 0 to the highest frequency, and the deceleration time is the time required for the output frequency to drop from the highest frequency to 0. The acceleration and deceleration time is usually determined by the rise and fall of the frequency setting signal. When the motor accelerates, it is necessary to limit the rising rate of frequency setting to prevent overcurrent, and when the motor decelerates, it is necessary to limit the falling rate to prevent overvoltage.

Requirements for setting acceleration time: limit the acceleration current below the overcurrent capacity of the inverter to avoid the inverter tripping due to excessive stall; The key points of deceleration time setting are: to prevent the voltage of smoothing circuit from being too high, and not to stall the regenerative overvoltage and trip the inverter. The acceleration and deceleration time can be calculated according to the load, but in debugging, a long acceleration and deceleration time is often set according to the load and experience, and whether there is current and overvoltage alarm is observed through the motivation of starting and stopping the power supply; Then the setting time of acceleration and deceleration is gradually shortened, and the best acceleration and deceleration time can be determined by repeating several operations on the principle of not giving an alarm during operation.

Double torque lifting

Also known as torque compensation, it is a method to increase the low frequency range f/V to compensate the torque reduction caused by the resistance of the motor stator winding at low speed. When set to automatic, the voltage during acceleration can be automatically increased to compensate the starting torque, so that the motor can accelerate smoothly. If manual compensation is used, a better curve can be selected through experiments according to the load characteristics, especially the starting characteristics of the load. For the variable torque load, if it is not selected properly, the output voltage will be too high at low speed, which will waste electric energy. Even when the motor is started with load, the current is large, but the speed will not go up.

Three-electron thermal overload protection

This function is set to prevent the motor from overheating. It is used by the CPU in the frequency converter to calculate the temperature rise of the motor according to the running current value and frequency to protect the motor from overheating. This function is only applicable to the situation of "one for one". In the case of "one for more", each motor should be equipped with a thermal relay.

Set value of electronic thermal protection (%) = [Rated current of motor (A)/ Rated output current of frequency converter (A)] ×100%.

Four-frequency limitation

That is, the upper and lower limits of the output frequency of the inverter. Frequency limitation is a protective function to prevent the output frequency from being too high or too low due to misoperation or fault of external frequency setting signal source, so as to prevent equipment from being damaged. It can be set according to the actual situation in application. This function can also be used to limit the speed. For example, some belt conveyors can be driven by a frequency converter to reduce the wear of machinery and belts, and the upper limit frequency of the frequency converter can be set to a certain frequency value, so that the belt conveyor can run at a fixed low working speed.

Five offset frequency

Some are also called deviation frequency or frequency deviation setting. Its purpose is to adjust the output frequency when the frequency is set by an external analog signal (voltage or current), as shown in figure 1. When the frequency setting signal of some inverters is 0%, the deviation value can be in the range of 0 ~ fmax, and some inverters (such as Mingdian House and Sanken) can also set the bias polarity. For example, when the frequency setting signal in debugging is 0%, the output frequency of the inverter is not 0Hz, but xHz, so the output frequency of the inverter can be 0Hz by setting the offset frequency to negative xHz.

Six-frequency set signal gain

This function is only effective when the frequency is set with an external analog signal. Used to make up for the inconsistency between the external set signal voltage and the internal voltage of the frequency converter (+10v). At the same time, it is convenient to select the analog set signal voltage. When setting, when the analog input signal is the maximum (such as 10v, 5v or 20mA), find out the frequency percentage that can output f/V graphics and set it as a parameter. If the external setting signal is 0 ~ 5v and the output frequency of the frequency converter is 0 ~ 50hz, the gain signal can be set to 200%.

Seven torque limits

It can be divided into driving torque limit and braking torque limit. It calculates the torque by CPU according to the output voltage and current of frequency converter, which can significantly improve the recovery characteristics of impact load during acceleration and deceleration and constant speed operation. Torque limiting function can realize automatic acceleration and deceleration control. Assuming that the acceleration and deceleration time is less than the load inertia time, it can also ensure that the motor automatically accelerates and decelerates according to the torque set value.

The driving torque function can provide powerful starting torque. In steady-state operation, the torque function will control the motor slip and limit the motor torque to the maximum set value. When the load torque suddenly increases, even if the acceleration time is set too short, it will not cause the inverter to trip. When the acceleration time is set too short, the motor torque will not exceed the maximum setting value. Large driving torque is beneficial to starting, and it is best to set it at 80 ~ 100%.

The smaller the set value of braking torque, the greater the braking force, which is suitable for sudden acceleration and deceleration. For example, if the set value of braking torque is too large, an overvoltage alarm will appear. If the braking torque is set to 0%, the total amount of regeneration added to the main capacitor can be close to zero, so the motor can decelerate to a stop without using a braking resistor without tripping. However, on some loads, such as when the braking torque is set to 0%, there will be a short idling phenomenon during deceleration, which will lead to repeated startup of the inverter and great current fluctuation. In severe cases, the inverter will trip, which should be paid attention to.

Eight acceleration and deceleration mode choices

Also known as acceleration and deceleration curve selection. There are generally three kinds of curves for frequency converters: linear, nonlinear and S-type, and most of them choose linear curves. The nonlinear curve is suitable for variable torque loads, such as fans. S curve is suitable for constant torque load, and its acceleration and deceleration change slowly. When setting, the corresponding curve can be selected according to the load torque characteristics, but there are exceptions. When the author debugs the frequency converter of boiler induced draft fan, the acceleration and deceleration curve first selects the nonlinear curve, and when the frequency converter starts together, it will trip. Adjusting and changing many parameters has no effect, and then it is normal to change it to S curve. The reason is that the induced draft fan turns to negative load due to flue gas flow before starting, so the S curve is selected to make the frequency rise slowly in the initial stage of starting, thus avoiding the occurrence of inverter tripping. Of course, this is the method adopted by the inverter without DC braking function.

Nine torque vector control

The theoretical basis of vector control is that asynchronous motor and DC motor have the same torque generation mechanism. Vector control method is to decompose the stator current into specified magnetic field current and torque current, control them separately, and output the stator current synthesized by them to the motor. Therefore, in principle, the same control performance as DC motor can be obtained. With the help of torque vector control function, the motor can output the maximum torque under various working conditions, especially in the low-speed running area.

At present, almost all frequency converters adopt vector control without feedback. Because the inverter can compensate the slip according to the magnitude and phase of the load current, the motor has very hard mechanical characteristics and can meet the requirements of most occasions, and there is no need to set a speed feedback circuit outside the inverter. The setting of this function can be determined according to the actual situation, and you can choose one of the effective and invalid functions.

The related function is slip compensation control, whose function is to compensate the speed deviation caused by load fluctuation, and the slip frequency corresponding to the load current can be added. This function is mainly used for positioning control.

Ten energy-saving controls

Both the fan and the water pump are torque-reducing loads, that is, with the decrease of the rotational speed, the load torque decreases in direct proportion to the square of the rotational speed. The inverter with energy-saving control function is designed with a special V/f mode, which can improve the efficiency of the motor and the inverter and automatically reduce the output voltage of the inverter according to the load current, thus achieving the purpose of energy saving, and can be set as effective or invalid according to the specific situation.

It should be noted that these two parameters are very advanced, but some users can't enable them at all when the equipment is reformed, that is, the inverter trips frequently after being enabled, and everything is normal after being disabled. The reasons are as follows: (1) The original motor parameters are too different from those required by the frequency converter. (2) I don't know enough about the function of setting parameters. For example, the energy-saving control function can only be used in V/f control mode, but not in vector control mode. (3) Vector control mode is enabled, but manual setting and automatic reading of motor parameters are not carried out, or the reading method is improper.

What basic parameters need to be set for frequency converter speed regulation? First of all, it depends on what type of inverter you use.

For example, 6se70

Debugging steps of 6SE70 frequency conversion device

The peripheral design of 6SE70 device is closely related to the debugging steps. This paper introduces the debugging of 6SE70 device in wire rod engineering.

Process.

If no parameter group is specified in the following parameters, they are all set in the first set of parameters and copied to the second set of parameters.

I. Setting of internal control parameters

1. 1 factory parameter settings

P053=7 allows CBP+PMU+PC to modify parameters.

P60=2 (fixed setting, parameters restored to default values)

P366 = 0(PMU control)

P970=0 (start parameter reset)

After the factory setting of the above parameters is completed, only the settings of frequency converter and command source are set, and the P366 parameters are selected differently.

The setting and command source of frequency converter can come from (terminal, OP 1S, PMU), and simple frequency converter operation can be carried out. But the motor

And control parameter groups are not set, so motor debugging cannot be carried out.

1.2 Simple parameter setting

P60=3 (simple application parameter setting, based on the above factory parameter setting, this application sets motor and control parameters).

P07 1= common DC bus voltage (540 volts)

P95 = 10(IEC motor)

P 100 = 1(V/F open-loop control)

P 10 1= rated voltage of motor (v)

P 102= rated current of motor (a)

P 107= rated frequency HZ of the motor.

P 108= rated speed RPM of motor.

P368=0 (set the command source to PMU+MOP)

P370= 1 (start simple application of parameter setting) (set automatically according to P368, but P56 1. * must be set to 1).

P60=0 (simple application parameter setting ends)

After the above parameters are set, the frequency converter will run automatically according to P 100 (control mode) and P368 (setting and command source).

P 10 1-P 109 (motor parameters) combination function diagram connection and parameter setting. P368 See Manual S0-S7, P 100 for the selected function diagram.

See Manual R0-R5 for the selected function diagram, and corresponding P040 and P042 show the speed setting and actual speed. The debugger has access to.

PMU is used for motor debugging, but the motor control effect is not ideal.

1.3 system parameter setting

P60=5

P068= 2, with dv/dt filter.

P 1 15= 1 Automatic parameter setting of motor model, and automatic calculation according to motor parameter setting.

P 130= 10 motor encoder selection, without encoder.

3 3

P352= frequency reference value HZ (maximum set value)

P60= 1 (return to the parameter menu, and check whether the input parameter value is reasonable when exiting, and failure will result from improper setting).

1.4 supplementary parameters are set as follows

P 128= maximum output current a (used for IMAX regulator in V/F control mode or current regulator in vector control mode, unit: in

In parameter automatic setting and motor identification, P 1 15 = 1, 2, 3; This value is preset as 1.5 times the rated current of the motor, and the maximum current of the inverter 1.36 times or 1.6 times and the allowable overload multiple of the motor should be considered comprehensively in the setting process. )

PMU forward and reverse parameter settings

P57 1. 1=6 PMU rotates forward.

P572. 1=7 PMU inversion

P462. 1=8 Time for acceleration from standstill to reference frequency, P463=0 (unit is seconds).

P464. 1=5 Time for deceleration from reference frequency to standstill, P465 = 0(S).

P640. 1=KK 148，P640.2=K22

P643. 1= 10V× maximum frequency of motor/maximum indication of frequency meter.

P643.2= 10V× maximum current of motor/maximum indication of ammeter.

P652. 1= 106 fault signal output.

P588=B 14 The fan signal at terminal 5 is regarded as external lighting fault 1 (collection area P588=B 18).

What are the basic parameters that Delta C2000 inverter needs to set? First, you need to teach yourself some parameters, and then give some parameters according to the specific equipment! If you need an electronic manual, please contact me, the distributor in Henan Delta!

What basic parameters need to be set when the inverter adopts panel control? What brand is the frequency converter? If it is the frequency converter of Weichuang Electric, it is good to set the command channel in operation. For more information, please refer to the instruction manual provided on the website.

What are the functions and main parameters of the frequency converter? How to set the parameters of frequency converter? What are the basic parameters that must be set? Frequency converter is an electric power device that changes the power frequency alternating current into three-phase alternating current with adjustable frequency and voltage to realize the speed regulation of three-phase alternating current asynchronous motor.

There are generally dozens to hundreds of parameters of frequency converter, depending on the instruction manual. Usually parameters need to be set with electronic overcurrent protection, upper and lower frequency, acceleration and deceleration time, etc. Others need to be determined according to the load and the control mode of the inverter.

What are the basic parameters of LED? Basic parameters of LED:

I. Optical parameters:

Luminous intensity, luminous flux, radiation intensity, wavelength, color temperature, color purity, half-wave width, etc.

Second, the electrical parameters:

Threshold voltage, forward current, DC voltage drop, reverse current, reverse breakdown voltage, switching time, capacitance, etc.

Thermal parameters: junction temperature, thermal resistance and shell temperature.

Fourth, effective life,

Verb (abbreviation of verb) security performance, etc.

Briefly describe the basic parameter significance of frequency converter. Motor parameters-rated current, voltage, frequency, speed and number of poles of the motor.

IO setting-defines the IO point function of the inverter.

Control parameters-the control type of frequency converter, such as V/F control? Flux vector control? Is there an encoder?

The source of command and speed-start and stop command, how does speed come from? From the input point? Remote signal?

Basically everyone's inverter has these parameters, which is the most basic. Other parameters are that each family has its own explanation.

What are the basic parameters of the loudspeaker, such as type, caliber, diaphragm material, rated power, impedance, response range, sensitivity and opening size?

Basic parameter setting of Siemens 440 inverter 1. Debugging method of frequency converter (based on motor power 1.5kw)

For Siemens 440 inverter, debugging is divided into two steps:

Step 1: First, quickly debug the frequency converter, so that the main parameters of the frequency converter can be set. The specific method is as follows:

First, set the parameters P0 100=30, P0970= 1 and P0970 = 1, and restore the inverter to the factory default parameters of about 10 seconds to complete the inverter parameter reset.

Then set the parameter P00 10= 1 to enter the rapid debugging process, and set the following parameters:

P0 100=0

P0205=0

P0300= 1

P0304=400

P0305=3.7

P0307= 1.5

P03 10=50

P03 1 1= 1425

P0700 = 1 BOP panel manual operation mode

P 1000 = 1 BOP panel manual operation mode

P 1080=0

P 1082=50

P 1 120= 10

p 1 12 1 = 10

P 1 135=5

P 1300=20

P3900= 1 After the inverter displays BUSY for about 10 seconds, the quick debugging is completed.

Set parameter P0003=3, debug 4-20mA corresponding to 0-50Hz, and modify the following parameters:

P0756=2

P0757=4

P0758=0

P0759=20

P0760= 100% for 50 Hz, 80% for 40 Hz and 70% for 35 Hz.

P076 1=4.00 Avoid inverter inversion due to 4-20mA control signal drift. When the frequency is lower than 4mA, the frequency converter is regarded as 4mA and will not be reversed.

The above process completes the setting of the control of the frequency converter by the BOP panel.

On the BOP panel of the frequency converter, press the Run key, and increase and decrease the frequency through the up and down arrows to control the feeding of the screw conveyor. Press the stop key to stop the output of the frequency converter.

In order to realize external automatic control, the following two parameters need to be modified.

P0700=2 external automatic control mode

P 1000=2 external automatic control mode

What are the basic parameters of the water pump? Usually, there are six personalization parameters.

1, flow (capacity, emissions)

2. Head

3. Strength

(1) shaft power (input power) p

(2) Effective power Pe

(3) Matching power machine

(4) Hydraulic power

(5) The pump loses power (power loss)

4, efficiency (efficiency)

5. Pump speed

6. Allow suction vacuum height [Hs] or necessary cavitation allowance δ hr.