Motor soft starter is the primary selection of power electronics skills and microprocessing skills and modern control theory and design and production of advanced level of new engine equipment, motor soft starter mainly has anti-interference function, high reliability, multiple protection functions and other characteristics, according to these characteristics of motor soft starter has been widely used, mainly used in fans, pumps, conveying and compressors and other fields.
Motor soft starter is a new type of motor control equipment that integrates multiple functions such as motor soft start, soft parking, light load and energy saving. The soft starter is mainly to choose three opposite parallel thyristors as a voltage regulator to connect it between the power supply and the motor stator, so that when the soft starter starts the motor, the voltage output by the thyristor is gradually added, and the motor is gradually accelerated, until the thyristor is dredged and the motor works on the mechanical characteristics of the additional voltage, so as to complete the smooth start and reduce the starting current, so as to prevent the phenomenon of excessive starting current and tripping. When the motor reaches the extra number of revolutions, the starting process is completed, the soft starter automatically replaces the thyristor with the bypass contactor, and supplies additional voltage for the normal operation of the motor, so as to reduce the heat loss of the thyristor and extend the service life of the soft starter and improve its work efficiency.
Together with the motor soft starter also provides the function of soft parking, soft parking and soft start process is really good, the voltage gradually drops, the number of revolutions gradually drops to zero, to prevent the torque impact caused by free parking.
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The inverter prepares the braking resistance factor – Reynolds
The preparation of the braking resistor of the inverter is mainly to consume part of the energy on the DC bus capacitor through the braking resistor to avoid the capacitor voltage being too high. Theoretically, if the capacitor stores a large amount of energy, it can be used to release it to drive the motor and avoid energy waste. However, the capacitance of the capacitor is ...
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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 ...
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Reynolds inverter control method
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
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Problems between the inverter and the motor – Reynolds
1. The power and temperature rise of the motor
Regardless of the method of the inverter, different degrees of harmonic voltage and current occur during operation, so that the motor runs under non-sinusoidal voltage and current. Rejection of material introduction, taking the sine wave PWM type inverter that is now widely used as an example, ...
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Reynolds inverter overhaul process
1) Query and query fault phenomena. The fault phenomenon of the inverter is varied, for example, the same type of problem may have different problem phenomena, and different types of problems may have the same kind of problem, which brings difficulties to find the problem. However, the problem phenomenon is the fundamental basis for repairing the inverter ...
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The internal structure of the inverter is the role of Reynolds
The inverter is mainly composed of rectifier (AC to DC), filtering, inverter (DC to communication), braking unit, drive unit, detection unit and microprocessor unit.
The inverter adjusts the voltage and frequency of the output power supply by the internal IGBT break, and ...
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Reynolds soft starter manual
Reynolds JJR5000 series all-digital intelligent AC motor soft starter adopts power electronics technology, microprocessor technology and modern control theory technology, and is a new type of starting equipment at the international advanced level. This product can effectively limit the starting current of asynchronous motor start-up, and is widely used in ...
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Inverter breakdown factor – Reynolds
1. Overpressure leads to brake pipe breakdown.
The so-called overvoltage of the inverter refers to the fact that the inverter voltage composed of various reasons exceeds the additional voltage, which is reflected in the DC voltage of the inverter DC bus.
Overvoltage alarm generally appears when the machine is shut down, and its main ...
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The Reynolds SVG series was successfully completed
More than 40 sets of RNSVG series low-voltage power generator sets and RNZB series high-voltage reactive power automatic compensation devices designed and produced by Reynolds have been successfully completed and will be delivered in the near future.
This product is owned by Shanghai Reynolds ...
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Wiring of the main circuit of the inverter - Reynolds
(1) Inverter three-phase communication input terminal (R, S, T)
The power input terminal is connected to the three-phase communication power supply through the circuit breaker of the circuit breaker for line protection, regardless of the connection phase sequence. It should be noted here that the three-phase communication power supply must not be directly connected to the inverter output ...
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Safety precautions for low-voltage soft lift - Reynolds
Precautions for low-voltage soft starters
For cooling purposes, the soft starter must be installed in a straight direction.
In order to ensure excellent heat dissipation, there should be room for the soft starter device.
Main circuit selection ...
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Frequency converter soft troubleshooting – Reynolds
Undervoltage is also a problem that we often encounter in application. Mainly because the voltage of the main circuit is too low (220V series is lower than 200V, 380V series is lower than 400V), the main reason: a certain way of the rectifier bridge is damaged or there is abnormal operation in the three ways of the thyristor, which may lead to the appearance of undervoltage problems, ...
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What inverter to choose what occasion - Reynolds
We need to ensure that the capacity of the inverter is matched. First of all, according to the nature of the load, the correct selection of the type of inverter.
When selecting the inverter, the current value of the actual motor should be used as the basis for the selection of the inverter, and the rated power of the motor can only be used as a ...
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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 ...
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The inverter has no short-circuit protection for the reason – Reynolds
Short-circuit maintenance is a function of equipment connected between the power supply and the load, which can effectively disconnect the short-circuit point from the power supply when the load side is short-circuited. If an equipment has a short-circuit maintenance function, it must have a certain short-circuit breaking ability; And a device with the ability to break in a short circuit ...
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Reynolds servo motor selection steps
According to the requirements of the operating conditions, the appropriate load inertia accounting formula is selected to calculate the load inertia of the organization.
According to the load inertia and servo motor inertia, the appropriate servo motor standard is selected.
Combined with the inertia and load inertia of the primary servo motor, the acceleration torque and deceleration are calculated.
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The inverter cannot adjust the frequency solution - Reynolds
1. The acceleration moment is too short.
Theoretically, the longer the acceleration time, the stronger the load lifting capacity. If the acceleration time is set too short, some VFDs will show an overcurrent or overload, overtemperature alarm, while others will not, and will only be stuck in a certain frequency band.
2.The V/F ratio is too large
Some of this ...
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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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Wiring method and principle of PLC and inverter shielded wire - Reynolds
In order to avoid the interference of the control signal line between the PLC and the inverter by the space electromagnetic field, the shielding wire can be connected to the outer layer of these control signal lines to improve the anti-interference ability of the system. This kind of wiring must be noted, and only one point can be selected for the grounding point of the shield. Whether it's on the PLC side, or ...
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Introduction to the appearance of Reynolds inverter
Bypass cabinet: The cabinet is equipped with high-voltage inlet and outlet isolation switches QS1 and QS2, as shown in Figure 2. Among them, QS1 is a single-pole single-throw variable frequency incoming knife switch, and QS2 is a single-pole double-throw power frequency and variable frequency outgoing knife switch. The bypass cabinet is a high-voltage environment, please observe the live display and electromagnetic lock status to ensure that the ...
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