|
Motor overload fault solution - Reynolds
Causes of inverter failure:
1. The grid voltage is too low
2. The rated current of the motor is set incorrectly
3. The motor stall or load abrupt change is too large
4. Large horse-drawn trolley
Inverter solutions:
1 ...
|
|
Structural characteristics of Reynolds RHY series inverter governor
1. Technology: (PC or PLC) is used to make the equipment complete the intelligent constant pressure variable supply water supply according to the requirements of water supply and fire protection;
2. High efficiency and energy saving: the system can set the pressure according to the demand, and the system actively adjusts the speed of the pump and the number of pumps according to the set pressure, so that the equipment can run in ...
|
|
Introduction to the key components of the inverter - Reynolds
There are many kinds of components of the inverter, different components have different functions, and different components have different specializations! In addition to the composition and application of Aideley inverter, there are also key components of inverter to provide for the operation of inverter.
|
|
Reynolds inverter power selection
The system power is equal to the product of the power of a general-purpose inverter and the power of the motor. As long as both work efficiently, the system power will be higher. From the perspective of power, when choosing VFD power, you should pay attention to the following points:
VFD ...
|
|
Inverter maintenance and undervoltage fault handling - Reynolds
In the repair of the inverter, we often hear about overpressure problems, but underpressure problems are also common problems encountered in the use of inverters. The reason is that the main circuit voltage is lower than the lower limit caused by the maintenance action or the damage of a rectifier bridge or the instantaneous power failure of the power grid, and the input is flat. Inverter after-sales ...
|
|
Reynolds inverter frequency
That is, the upper and lower amplitudes of the output frequency of the inverter. Frequency is a maintenance function to avoid misoperation or failure of the external frequency setting signal source, which causes the output frequency to be too high or too low, so as to prevent damage to the equipment. You can set it according to the actual situation in the app. This function can also be used as a speed limit, so that ...
|
|
The reason for the large fluctuation of harmonic parameters in the harmonic test of the output harmonic test of the inverter
In order to measure stable harmonics, it is necessary to meet the following two conditions:
At the top of the list, the signal is a stable periodic signal.
Second, it is necessary to perform harmonic analysis according to the integer multiple of the period of the stable periodic signal.
...
|
|
The object of protection of frequency converters in overload protection - Reynolds
Inverters are mainly divided into two categories according to the frequency conversion method: communication/DC/communication and communication/communication inverters. Here we take the widely used general "communication/DC/communication" as an example to briefly talk about its structure and operating principle. As can be clearly seen from the above diagram, the communication/...
|
|
Inverter selection conditions and precautions - Reynolds
1. When selecting the inverter, select the inverter with the appropriate control method according to the load characteristics
In addition to the inverter manufacturing process, it is also important to choose which control method of the inverter. The control method of the inverter is mainly divided into two types: open-loop control and closed-loop control. In the meantime, the open-loop control method ...
|
|
Reynolds inverter manual
Reynolds inverter brochure (partial)
Before installing
When unpacking, it is found that the machine has water or left water traces, indicating that the inverter has been flooded, so please do not install and use it.
When unpacking, it is found that the machine is damaged and deformed or the parts are missing, please do not install and use it, otherwise there will be fault expansion and personnel ...
|
|
Classification and working principle of Reynolds inverter
Classification of Reynolds frequency converters:
There are many classification methods for Reynolds inverters, which can be divided into voltage-type inverters and current-type inverters according to the classification of the main circuit operation method; According to the classification of switching methods, it can be divided into PAM operation.
|
|
Tips for using reducers - Reynolds
1. After 200-300 hours of operation, the first oil change should be carried out, and the quality of the oil should be checked regularly in the subsequent use, and the oil mixed with impurities or deteriorated oil must be replaced in time. Under normal circumstances, the reducer for long-term continuous operation should be replaced after 5000 hours of operation or once a year.
|
|
Inverter control loop wiring taboo - Reynolds
1. The wires laid out in the inverter control circuit should be separated from the main circuit cable (power line), so as to avoid the harmonic disturbance components on the side of the main circuit of the inverter from polluting the inverter control circuit;
2. Due to the faulty signal of the inverter and ...
|
|
The difference between servo and inverter - Reynolds
Overload can be different
Servo drives generally have 3 times the overload ability, which can be used to overcome the inertial moment of the inertial load at the moment of start-up, while the frequency converter generally allows 1.5 times the overload.
Handling precision
Servo control ...
|
|
Inverter control method - Reynolds
The output voltage of low-voltage general frequency conversion is 380-650V, the output power is 0.75-400kW, and the operating frequency is 0-400Hz. Its control methods have gone through the following four generations. 1U/f=C Sinusoidal Pulse Width Modulation (SPWM) Manipulation MethodIts Characteristics ...
|
|
The difference between inverter motor and ordinary motor - Reynolds
1. The heat dissipation system is different: Generally, the cooling fan in the fan is in the same line as the fan movement, while the two are separated in the inverter motor. Therefore, when the frequency conversion of the fan is too low, it may burn out due to overheating.
2. Frequency conversion ...
|
|
Inverter installation and heat dissipation treatment - Reynolds
The inverter has power loss during operation and converts it into heat energy, which increases its own temperature. Roughly speaking, the power loss of every 1kVA inverter capacity is about 40W-50W. Therefore, when installing the inverter, it is necessary to consider the heat dissipation of the inverter, and how to run the inverter.
|
|
How long is the cable between the inverter and the motor allowed - Reynolds
The voltage waveform output by the inverter is only similar to a sine wave, but not a real sine wave, and its waveform contains a large number of harmonic components.
As we all know, the higher harmonics will increase the output current of the inverter, causing the motor winding to heat up.
|
|
Water pump inverter pressure adjustment method - Reynolds
Water pump inverter pressure conditioning steps: 1. Open PID closed-loop control; 2. Close the pressure circuit; 3. Set the pressure feedback and set the given pressure; When the pump speed is changed, the outlet pressure can be changed. Adjust the operating frequency of the VFD. The higher the frequency, the higher the pump speed and the higher the pressure. About ...
|
|
Replacement of spare parts for frequency converters – Reynolds
In order for a VFD to operate reliably for a long time, it is necessary to repair the electronic components in the VFD on a regular basis and replace the primary components of the VFD according to the service life.
1. Cooling fan
The VFD power module is the most heat-generating device, and its ...
|