Invitrogen inverter agent teaches you to solve the inverter frequency.
Invitro Drive agent teaches you to solve the problem that the frequency of the inverter can not be adjusted, the frequency of the inverter can not be adjusted, if the hardware There is no damage on it. Generally, the large torque of the output of the inverter is smaller than the load to increase the torque. It is said that the inverter can be loaded with load. We can analyze the following six points:
1, zui high frequency and zui large frequency setting is too low. Generally these two parameters are set to the large value of zui, but the electrician who does not sweep some thick branches and leaves has changed these two parameters, so it will also form Unable to increase the frequency. 2, some special occasions parameter demand pairing. In some cases, the low frequency of Zui can't be set too low. For example, in the constant pressure water supply system, after the low frequency of the Zui is set to 0Hz, when the pump pressure is low, the frequency conversion is exceeded. When the frequency of the device is started, the frequency of the inverter starts to increase, and the pressure can't be increased. The frequency of the inverter is less than 50Hz, only about 38Hz. Repeatedly setting and conditioning the PID, the frequency is not going up. As long as the low frequency of the inverter zui is set to about 15-20HZ, the speed of the inverter can be satisfied, and the pump can be pressed to a certain pressure direction. Although the pressure is satisfactory for the constant pressure requirement, when the water is not used, the inverter cannot be completely stopped, and the speed of the low frequency of the Zui is maintained. This is because: in the constant pressure water supply system, the low frequency of the inverter zui cannot be set to 0HZ, and the general zui is less than 20HZ, which is determined by the flow rate and head of the pump. The method of processing is to set the sleep frequency. When the frequency of the water pump is not used for water (for example, 28HZ) for several minutes, the water pump sleeps, and when the pressure drops to 0.2-0.4MP lower than the set pressure, the water pump starts. Another method is to set up punctual water supply, and punctual water supply in several time periods. Generally, the constant pressure water supply controller has the functions mentioned above.
3. Hardware problems
inverter transformers Er) After the problem is presented, the correct current cannot be measured normally, or a similar situation may occur. In addition, a certain measuring component on the main board is aging, and this situation may occur. These are often encountered when repairing the inverter.
4, the acceleration time is too short. In theory, the longer the time is, the stronger the load will be, the faster the setting will be, and some inverters will show overcurrent. Overload and overheat alarms, etc., but some will not show up, but the card does not go on a certain frequency segment. 5, V / F ratio is too large. This some inverters are also called torque increase, this parameter setting is too large, and sometimes it will not be able to start normally, properly reducing the problem will be handled
6, vector control parameters are not matched. In the vector control form, the inverter's internal resistance, inductance and other parameters require fine measurement, and the vector parameters of the inverter are well matched. After a period of operation, the motor The parameter overheating forms an offset. At this time, the current is too large to start the motor normally. The frequency may also be stuck at a certain point, and the parameters can be re-optimized to deal with the problem.