Frequency conversion speed regulation is to change the power supply frequency through the frequency converter, and then adjust the motor speed to improve the operation efficiency of the electric drive system. Depending on the current, VFDs can be divided into AC-DC-AC type and AC-AC type. At present, the most widely used in China is the AC-DC-AC type.
1. Panel launch refers to the completion of all parameters and functions through panel operation;
2. The terminal starts, that is, the device potentiometer or external current and voltage signal you said is started; External relay closure or knife switch and button closure before starting;
3. Communication means that all signals and parameters are controlled by communication. If the load is not very large, the frequency will start from high or low. If the load is heavy, it is advisable to choose a better starting mode (optional in the parameters), increase the starting torque, and appropriately extend the acceleration and deceleration time. Directly to 50HZ, there will be no inrush current, VFD will have its own starting curve, will be set to speed up to 50HZ, instead of rushing to 50 all at once.
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Introducing the Reynolds JJR8000 series of intelligent soft starters
JJR8000 series of intelligent motor soft starter is the use of power electronics skills, microprocessor skills and modern control theory skills to produce today's international first-class starting equipment, the product can constrain the starting voltage of the asynchronous motor when starting, can be used in fans, water...
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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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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 ...
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Safety standards for AC drives – Reynolds
International electrical safety standards: The requirements are in line with international electrical safety standards, such as CE standards in Europe and UL specifications in United States. These specifications specify the requirements for electrical safety functions, mechanical safety functions, EMC functions, etc.
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The factor that causes the breakdown of the inverter – Reynolds
1. Overpressure leads to brake pipe breakdown.
The so-called overvoltage of the inverter refers to the fact that the inverter voltage formed due to various reasons exceeds the additional voltage, which is concentrated in the DC voltage of the inverter DC bus.
The overvoltage alarm generally appears at the time of shutdown, and its main ...
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Fault signal of the frequency converter - Reynolds frequency converter
There are three types of fault signals for the inverter:
(1) Excessive mechanical load: The primary feature of excessive load is that the motor heats up, and the operating current can be read from the display screen to find. The primary reason is that the load of the inverter is too large, and the acceleration and deceleration time and operation cycle time are too short; V/F ...
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The difference between a soft starter and an inverter – Reynolds
The inverter changes the output frequency and voltage together, that is, changes the n0 on the motor running curve, so that the motor running curve moves parallel downward. Therefore, the inverter can make the motor reach its maximum torque with a small starting current, that is, the inverter can start the heavy-duty load.
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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 ...
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Small fan inverter choice - Reynolds
Now many electrical appliances are advocating the use of small parts, because small parts will not occupy space, and small parts can be moved and overhauled at any time, and the inverter also has a small inverter, how to buy a small fan inverter?
Power picking
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The heat dissipation method of the switching power supply
1. Transfer heat pipes for heat dissipation.
In many applications, heat generated from the base steel plate of the power module is transferred through the heat transfer components to the distant surface of the heat pipe. In this way, the temperature of the base steel plate of the power module will be equal to the temperature of the heat pipe heat dissipation surface, the temperature of the heat transfer parts, and the temperature of the two contact ...
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Renault is available in a variety of product ranges
JJR1000系列：
JJR1011；JJR1017；JJR1022；JJR1030；JJR1037；JJR1045；JJR1055；JJR1075；JJR1090；JJR1115；JJR1132；JJR1160；JJR1200；JJR1250；JJR1320；JJR1400；JJR1500；JJR1600 ...
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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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The working principle of the motor soft starter – Reynolds
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 electric ...
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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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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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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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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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The inverter uses a power-saving method – Reynolds
As an electronic electric, the inverter itself also consumes electricity (about 3-5% of the rated power). A 1.5 hp air conditioner consumes 20-30W of electricity, which is equivalent to the length of a lamp. The inverter works under the power frequency and has the function of saving electricity, which is practical. However, the conditions are:
First, high power and ...
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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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The cause of damage to the inverter brake unit - Reynolds
The inverter motor is equipped with a mechanical brake, is the inverter motor in the power generation condition when parking? Is the brake unit of the inverter working at the moment? What are the causes of brake unit damage?
Answer: 1. The inverter motor is equipped with a mechanical brake, and when parking...
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