Author: inverter source: http://www.shbolaite.cn release time: 2016-06-12
Set the parameters of air compressor inverter, must choose the size of each parameter are often encountered in use due to a single parameter set wrong, resulting in the air compressor inverter can not operate normally scene, therefore, must be accurate to set the relevant parameters.
1 control method
Speed control, pitch control, PID control, or other methods. After the adoption of the control method, the static or dynamic identification is usually based on the control precision.
2 minimum operating frequency
That is, the minimum motor speed, motor operating at low speed, the cooling function is very poor, long-term operation of the motor at low speed, will cause the motor burned. And at low speed, the current in the cable will increase, will cause the cable heating.
Shanghai light air compressor
3 maximum operating frequency
The air compressor is usually the maximum frequency converter to 60Hz, some even to 400Hz, high frequency motor will enable high-speed operation, the general motors, the extra speed bearings can not be long-term operation, whether the motor rotor can accept the centrifugal force so.
4 carrier frequency
The higher the carrier frequency is, the higher the weight of the harmonic wave, which is closely related to the length of the cable, the heating of the motor, the heating of the compressor and the heating of the compressor.
5 motor parameters
Air compressor motor, power inverter set in the parameter of current and voltage, speed, maximum frequency, these parameters can be obtained directly from the motor nameplate.
6 frequency hopping
At a certain frequency point, may attack scene is in resonance, especially all devices; in the control of compressor, to avoid the surge point tightening machine.
7 plus deceleration time
The acceleration time is the time required for the output frequency to rise from 0 to the maximum frequency. The deceleration time is the time from the maximum frequency down to 0. It is usually used to determine the acceleration and deceleration time of the frequency setting signal. When the motor is speeding up, it is necessary to restrain the rising rate of frequency setting to avoid over current, and to reduce the rate of restraint to avoid over voltage.
To speed up the time setting request: will accelerate the current constraint over current capacity of the compressor inverter, not to make the flow of air compressor stall due to inverter tripping; deceleration time setting key is: avoid smooth circuit voltage is too large, do not make the air compressor stall overvoltage regenerative converter tripping. The acceleration and deceleration time can be calculated according to the load, but in debugging often adopted by the load and go through the first set longer deceleration time, by starting and stopping motor were observed over current and over voltage alarm; then the deceleration time gradually shortened to keep a job, do not attack the police as a criterion of repeatseveral back, will be able to determine the best deceleration time.
8 torque increase
Also called for is for low speed torque, torque drop compensation caused by motor stator winding resistance, and the method of low frequency scale increasing f/V. Set as active, can make the voltage to speed up when the initiative to improve to compensate for the torque, the motor speed up smoothly. Such as the use of manual compensation, according to load characteristics, especially load starting characteristics, through the experiment can select a better curve. For variable torque load, such as the selection of the low speed will be shown when the output voltage is too high, and the scene of the destruction of electricity, and even the motor will start with a load current is large, and the speed can not go on the scene.
9 electronic thermal overload protection
This function is to maintain the motor overheating and set, it is the air compressor inverter CPU according to the operating current value and frequency of the motor temperature calculation, and then overheating maintenance. This function is only applicable to the "one" and "one in many occasions,", should be installed in each motor on thermal relay.
The electronic heat maintenance set value (%) n additional current motor (A) / air compressor inverter additional output current (A)] x 100%.
10 frequency constraint
The upper and lower limits of the output frequency of air compressor inverter. Frequency constraint is to avoid the wrong operation or external frequency setting signal source error, resulting in the output frequency is too high or too low, in order to prevent damage to a maintenance function of the device. In the application can be set according to the actual situation. This function can also be used as the speed limit, some belt conveyor for conveying material, not too much, to wear cut machine and belt, use air compressor and air compressor driven inverter, inverter upper frequency settings for a particular frequency, so it can make the belt conveyor operation in a fixed, low speed operation.
11 bias frequency
Error frequency or frequency error. The utility model is characterized in that when the frequency is set by an external analog signal (voltage or current), the frequency of the output frequency can be adjusted by adjusting the frequency setting signal at the lowest frequency. Some of the air compressor when the inverter frequency signal set is 0%, the error can be in 0 ~ Fmax scale, some air compressor inverter (such as electricity forhomes Sanken) can also bias polarity settings. Such as in the debugging when the frequency setting signal is 0%, air compressor inverter output frequency is not 0Hz, and xHz, then the bias frequency is set to negative xHz can make the air compressor inverter output frequency is 0Hz.
12 frequency setting signal gain
This function is useful only when the external analog signal is used to set the frequency. It is used to compensate the external signal voltage set and air compressor inverter voltage (+10v) is not consistent with doubt; convenient imitate setting signal voltage selection, a punctual, when the input signal is maximum when the imitation (such as 10V, 5V or 20mA), calculate the output frequency of f/V graphics and as a percentage of parameters can be set; such as external reference signal is 0 ~ 5V, if the compressor inverter output frequency is 0 ~ 50Hz, the signal gain is set to 200%.
13 torque constraint
It can be divided into two kinds of driving torque and braking torque. It is based on the inverter output voltage and current value, through CThe PU can be used to calculate the torque, which can improve the recovery performance of the shock load when the acceleration and deceleration are constant. Torque constraint function can be completed to speed up and speed down control. Assuming that the acceleration and deceleration time is less than the moment of inertia, the motor can also be guaranteed to speed up and slow down in accordance with the torque setpoint.
The driving torque function provides strong torque, steady in operation, the function will control the motor torque slip, and the motor torque constraints on maximum value set, when the load torque suddenly increases, and in speeding up the set time is too short, it will not lead to air compressor converter tripping. The motor torque will not exceed the maximum value when the speed is set too short. The driving torque is favorable for starting, and is set to 80 ~ 100%.
Brake torque setting value is smaller, the greater the power of the system, suitable for the occasion of rapid acceleration and deceleration, such as the setting of the brake torque settings over the general assembly over the scene showing the alarm. If the brake torque is set to 0%, the total amount of regeneration to the main capacitor can be close to 0, and then the motor can be slowed down to stop and not trip when the motor is not used. But in some loads, such as braking torque is set to 0%, deceleration may occur when the short time racing scene, the formation of air compressor inverter repeat starting, current substantial shake, severe will make the air compressor inverter tripping should lead to attention.
Source: Bolaite compressor http://www.shbolaite.cn (reprint article must indicate the source of the infringement.