The actuator commonly used in the industrial field of Reynolds inverter has good speed regulation performance and simple and convenient operation method. Therefore, it is widely used in the automation system.
Typical wiring method for the main circuit of a Reynolds frequency converter
In general, in the process of practical application, some of the units in the above diagram may be used selectively. For example, if the field is common for low power, it is common not to choose a braking resistor; If the distance between the field motor and the Reynolds inverter is close, the output reactor of the Reynolds inverter can be optional...... Of course, these are selective applications according to the practical situation. If it is not necessary, it can be selected not to be used. Although there are no drawbacks, the cost of building an electrical system must be added; The complexity of the system will also increase.
Reynolds inverter controls the IO
Wiring diagram of a typical operation of a Reynolds inverter, which can be seen from the interface. It has switching control inputs/outputs, analog control inputs, etc. Diversified interfaces provide a variety of selection methods when building the system.
Switching inputs
When only the start, stop, rotation, and multi-speed control of the Reynolds inverter are performed, the motor can be controlled by selecting the switching input.
Analog inputs
In the application scenario where the motor needs to be regulated, a speed regulation analog signal can be input to the Reynolds inverter. to complete the control of the motor speed.
Digital + analog inputs
In applications such as constant pressure water supply, the pressure signal of the water pressure sensor of the external pipeline can be connected to the analog input port of the Reynolds inverter. The PID control function inside the Reynolds inverter is used to form a closed loop of control and complete the control policy of constant pressure water supply. A constant pressure control unit is formed. The digital signal completes the start and stop of the Reynolds inverter.
Communication bus
If the system has a control bus, it can be controlled more sensitively through the bus. Reduce the number of cables that need to be built in this system. Through the bus, the control form and operation status of the Reynolds inverter can be completed simply.
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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 ...
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Advantages of frequency converters over soft start – Reynolds
(1) The starting torque is large and the power factor is high. Because the power factor of the motor is related to the working frequency, the power factor under the power frequency power supply is much lower than that under the low-frequency power supply when the motor is running at low speed. The inverter can control the motor from low frequencies and ...
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The water pump is controlled by a frequency converter – Reynolds
1. The constant pressure water supply of the inverter increases the comfort of water supply by 3 times
2. Constant water pressure, reducing pipe bursts and leakage by 80%
3. High efficiency and energy saving, power saving effect up to 20%-60% (depending on the actual situation)
4. The use of frequency converters can realize multi-point pressure in different time periods.
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Soft start uses common faults and solutions - Reynolds
In the process of daily use of soft starters, it is inevitable to encounter some improper use or failure of soft starters in the process of use
1. The user starts ...
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Inverter composition and various functions - Reynolds
Rectifier circuit: rectify 50HZ communication power into direct current.
Frequency conversion circuit: The rectified direct current is inverted into a variable frequency communication current.
Control part: control the frequency of communication electricity output by the inverter circuit.
Maintenance circuit: maintenance and blockage of overcurrent and phase loss ...
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The cause of bearing noise in different situations of frequency converters - Reynolds
1. If the bearing is in good continuous rotation condition, it will emit a low whining or humming sound. Sharp hissing, squeaking and other irregular sounds often indicate that the bearing is in a bad continuous rotation condition. The sharp squeaky noise can be due to the formation of an inappropriately smooth ...
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Overheating failure light on start-up analysis - Reynolds
(1) Frequent starting, resulting in excessive temperature, causing overheating maintenance of soft starter. (The number of starts of the soft starter should be controlled to no more than 6 times per hour, especially for heavy loads)
(2) During starting, ...
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Abnormal handling of inverter series reactor - Reynolds
Capacitor series reactors generally adopt epoxy glass fiber multi-encapsulated parallel structure, according to the characteristics of the device site, three-phase vertical stacking, three-phase horizontal "△" and three-phase horizontal "-" type distribution.
The substation in the southern area ...
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Reynolds permanent magnet synchronous motor solutions
The permanent magnet synchronous motor has high-efficiency motor drive performance, which can complete high-speed, high-precision, high-stability, fast-responding, high-efficiency and energy-saving motion control. Reynolds drives provide a vector control technology solution for permanent magnet synchronous motors.
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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 ...
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The difference between inverter motor and ordinary motor – Reynolds
Inverter motor - used for special occasions with inverter, it is different from the general motor in that a strong cooling fan is added. And the power of the fan comes from the independent power supply, can not be from the main motor out of the line, the effect of the strong cooling fan is to ensure that the motor at low speed...
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Inverter leakage solution - Reynolds
1. The cause of the leakage problem
Some sites use frequency converters to control the motor, which will present the problem of leakage, and the leakage voltage ranges from tens of volts to 200 volts. In view of this problem, the reasons for this shortcoming are theoretically expounded and stated as follows.
Depend on...
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Features of electronic single-phase current transmitter – Reynolds
Single-phase current transmitter is a kind of electric power test substation developed for the power measurement of single-phase communication in motor experiments on the basis of motor experiment and testing technology research, in accordance with IEC and relevant national specifications for motor experiments. The use of advanced filtering technology, reasonable software algorithms, ...
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How to determine the frequency of start-up – Reynolds
Generally, most motors start to speed up from 0Hz, but in some special cases, it is necessary to start directly from a certain frequency. At this time, the frequency output of the VFD at the moment of activation is the activation frequency. In general, you need to set the activation frequency in the following situations.
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Features of the unit tandem inverter - Reynolds
(1) The multi-pronged PWM control method is selected, and the output voltage waveform is close to the sine wave.
(2) The rectifier circuit is multiplied, the number of pulses is as high as 36, the power factor is high, and the input harmonic is small.
(3) Modular design, compact structure ...
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Reynolds product range models
JJR1000系列：
JJR1011；JJR1017；JJR1022；JJR1030；JJR1037；JJR1045；JJR1055；JJR1075；JJR1090；JJR1115；JJR1132；JJR1160；JJR1200；JJR1250；JJR1 ...
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Parameter setting of acceleration and deceleration time of Reynolds universal inverter
The acceleration time of the Reynolds inverter is the time required for the output frequency to rise from 0 to the high frequency, and the deceleration time is the time required to decrease from the high frequency to 0. Generally, the frequency converter uses the frequency setting signal to rise and fall to confirm the acceleration and deceleration time. The rise of the frequency setting must be limited when the motor accelerates.
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Features of Reynolds high-voltage frequency converters
RNVH-A series high-voltage inverter adopts multi-unit series multi-level technology, which is attributed to high-high voltage source inverter, which can directly input 6KV/10KV and direct 6KV/10KV output. Taking the 6KV series as an example, each phase is connected in series by 5 power units, and each power unit is isolated by the input transformer.
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Faulty inverter – Reynolds inverter
In ancient times, there were ten major tortures, which made people unable to survive and die, and experienced the purgatory of the world; Today, there are ten "tortures" of inverters, and the same can make your inverters suffer. Let's follow the editor to find out which of the top ten "tortures" will make your inverter "worse than dead"!
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Difference Between Soft Starter and Inverter – Reynolds
Soft starters and frequency converters are two completely different products. The inverter is used in the local area where speed regulation is required, and its output not only changes the voltage but also changes the frequency at the same time; A soft starter is actually a voltage regulator, which is used when starting a motor, and the output only changes the voltage and does not change the frequency. Change...
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