Delixi general fan, pump, the requirements for the inverter are simple, only the inverter capacity is equal to the motor capacity. Roots blowers, deep-water pumps, sediment pumps, and fast-changing musical fountains are available in a larger capacity.
Crane loads
This type of load is characterized by a large impact at start-up, so a certain margin of the inverter is required. Together, when the heavy object is lowered, there will be energy feedback, so it is necessary to use the braking unit or choose the common bus method. The type of inverter can be selected as E180-CH series crane special inverter
Large inertial loads
This type of load has a high inertia, so it may oscillate when it starts, and there is energy feedback when the motor decelerates. A slightly larger inverter should be used to speed up start-up and avoid oscillation. The cooperative braking unit eliminates regenerative energy.
The load is not balanced
The load is sometimes light and sometimes heavy, and the inverter capacity should be selected according to the heavy load.
Type selection in the case of long wiring intervals with the motor
If the cable between the inverter and the motor is too long (more than 50 meters), it is necessary to install a communication output reactor at the output end of the inverter to avoid damage to the motor and the inverter caused by the coupling capacitance between the long cable to the ground and the distributed capacitance between the cable. In addition, the output cable is too long and the voltage drop is large, which may constitute the output torque of the inverter, and the capacity of the inverter can be expanded.
Type selection in the case of parallel use of multiple motors
When the inverter is used to control several motors connected in parallel, it must be considered that the sum of the length of the inverter-to-motor cables is within the allowable range of the inverter. If the specified value is exceeded, it is necessary to expand one or two gears to select the inverter. In other cases, the control method of the inverter can only be the V/F control method, and the inverter can not complete the overcurrent and overload protection of the motor, so it is necessary to install a thermal relay for each motor to protect it.
The load is selected as the type of high-speed motor
When using an inverter to control a high-speed motor, a large number of high-order harmonics will be generated due to the low reactance of the high-speed motor. These higher harmonics will increase the output current value of the inverter. Therefore, when choosing a frequency converter for high-speed motors, it should be slightly larger than the frequency converter of general motors.
The load is selected for the capacity of the winding motor
When the inverter drives the winding rotor asynchronous motor, because the winding motor is smaller than the general squirrel cage motor, the impedance of the winding motor winding is small, therefore, it is easy to overcurrent tripping caused by ripple current, so the inverter with a slightly larger capacity than the general capacity should be selected.
The load is selected for the type of synchronous motor
When the inverter drives the synchronous motor, compared with the power frequency power supply, the output capacity will be reduced by 10%-20%, and the continuous output current of the inverter is greater than the product of the rated current of the synchronous motor and the standard unit value of the synchronous intake current.
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Switching power supply FAQ - Delixi
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In a general environment, a blown safety wire indicates that there is a problem with the internal wiring of the power supply. Because the power supply is operated in the shape of high voltage and high current, the fluctuation of the grid voltage and the surge city cause the current in the power supply to increase suddenly and cause the safety wire to be blown off. The focus should be on checking the power ...
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The difference between inverter reactor and filter - Delixi
The following options are available on the output side of the drive:
1) Output reactor, when the length of the cable output from the inverter to the motor is greater than the specified value of the product, the output reactor should be added to compensate for the charging and discharging influence of the coupling capacitor when the long cable of the motor is running, so as to prevent the inverter from overcurrent. Output ...
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Delixi inverter uses the keyboard to set the frequency step
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Inverter is a very widely used equipment in the modern factory, this is a new type of equipment, the price is very noble, and the price of inverter repair is also very expensive, so in the process of using inverter, pay attention to the use of inverter, on the one hand, inverter, delay inverter ...
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1. Avoid water and air entering the transformer
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According to the controlled target and operating parameters such as voltage, current, power, frequency and operating system, the additional parameters of the contactor are determined.
1) The coil voltage of the contactor should generally be lower, so that the insulation requirements of the contactor can be reduced, and it is safer to use. But for the sake of the party ...
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Delixi circuit breaker common model features
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Classification of low-voltage electrical appliances - Delixi
1. Classified according to the operating voltage level
Low-voltage electrical appliances: electrical appliances used to communicate circuits below 1200V and DC 1500V to play the role of on/off, protection, control or regulation.
High-voltage electrical appliances: communication 1200V or more, DC 1500V or more.
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Causes the inverter breakdown factor - Delixi
1. Overpressure leads to brake pipe breakdown.
The so-called overvoltage of the inverter refers to the inverter voltage formed due to various reasons that exceeds the rated voltage, which is reflected in the DC voltage of the inverter DC bus.
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Problems in the installation and use of Delixi voltage regulator
What is the voltage regulator can not be connected in parallel, the voltage regulator is not open for a long time, what will be the problem with the voltage regulator still open under normal voltage, is it said that the voltage regulator and the undervoltage lamp is not lit to clarify that the voltage regulator is normal?
Will a normally open regulator burn it out at normal voltage?
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Delixi Group focuses on low-voltage power distribution and industrial automation in the field of comprehensive solutions suppliers, founded in 1984, is a collection of industrial operations, brand operations, capital operations as one of the large enterprise groups, for 18 consecutive years ranked among the top 500 Chinese enterprises. Delixi rangefinder is designed for ...
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1. The instantaneous high temperature in the grinding process will make the surface of the workpiece reach a molten state, and the steel surface will react with the oxygen in the air chemically, which will form a very thin (20-30nm) iron oxide film.
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