For example, the operating principle of voltage inverter is mainly to regulate the voltage source, and the voltage source regulates the current to achieve the role of conditioning, while the current inverter is to directly regulate the current to achieve the role of conditioning.
Which one is better? In fact, both have advantages, you can choose according to your own needs, generally choose more voltage conditioners, because the use conditions of current conditioners are more stringent, and the use of too large current or too small current for a while is not good for the line.
What should be paid attention to when using motor inverter?
For the sake of convenience, some people plug in one inverter directly to another machine without shutting down after using it, which will damage the inverter. Therefore, after the use of the inverter, the inverter should be stopped first, let the inverter rest for a few minutes, and then restart the inverter, so that the inverter can be used for a long time.
And the inverter should be grounded, if it is not grounded, the current of the inverter may overflow to the machine, and the operator may be electrocuted if he is in contact.
All in all, there are two points to pay attention to when using the motor inverter, the grounding treatment of the inverter and the inverter can not be directly used on another machine without shutting down, in addition to these two points, there are other places that need to be paid attention to, such as the hands of personnel should be dry and can not be plugged in when wet.
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LS power converter interference phenomenon
1. As soon as the inverter of the heat exchange station is opened, the pressure transmitter jumps randomly;
2. Use the inverter to control the water supply, the pressure transformer is used as the signal to collect the pressure, and the pressure transformer is disturbed by the inverter;
3. When the inverter starts the motor, the voltage converter signal is unstable and beats violently;
4. Pressure transformer (4-20 ...
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Inverter switching power supply circuit vein - LS power generation
1. Vibration circuit: the drainage-source and R4 of the main winding N1 and Q1 of the switching transformer are the channels for the working current of the power supply; R1 provides the starting current; The self-powered windings N2, D1, and C1 constitute the power supply voltage of the vibrating chip. The normal operation of these three links is the prerequisite for the power supply to vibrate.
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Selection principles and key points of AC contactors for power production
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. However, in order to facilitate and reduce the equipment, it is often selected according to the actual grid voltage.
2. The operating frequency of the motor is not high, such as compressor, water pump, air ...
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Inverter load test run step - LS power generation
1. Manually operate the work stop button of the inverter panel, investigate the work stop process of the motor and the display window of the inverter to see if there is any abnormal phenomenon.
2. If the inverter presents an overcurrent maintenance action during the process of starting P to abort the motor, ...
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Asynchronous motor with inverter - LS generates electricity
Before the asynchronous motor is equipped with an inverter, let's take a look at the three major types of mechanical equipment loads:
1. Constant torque load: such as conveyor belts and mixers; When the inverter drags a load of constant torque nature, the torque at low speed should be large enough and the overload capacity should be large enough. If you need ...
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Interference phenomenon that often occurs in LS power inverters
1. As soon as the inverter of the heat exchange station is opened, the pressure transmitter jumps randomly;
2. In the water supply controlled by the inverter, the pressure transformer is used as a signal to collect the pressure, and the pressure transformer is disturbed by the inverter;
3. When the inverter starts the motor, the voltage converter signal is unstable and beats violently;
4. Pressure transformer (4-20 ...
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Analysis of the problem of LS power inverter
1. What is the maintenance function of the inverter?
Maintenance functions can be divided into the following two categories:
(1) After detecting the abnormal situation, the correction action is automatically carried out, such as overcurrent loss speed avoidance, regeneration overvoltage stall avoidance.
(2) Block the PWM control signal of power semiconductor equipment after detecting the abnormality ...
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LS electric braking unit functions, advantages and operation process
First, the main function of the braking unit
In some applications, the need for rapid speed reduction, according to the principle of asynchronous motor, it can be known that if the slip is larger, the greater the torque, the same braking torque will increase with the increase of the speed reduction rate, so that the system speed reduction time is greatly shortened, and the energy feedback is greatly ...
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Fatal failure of LS power terminal block
From the point of view of application, the function that should be reached is: it is necessary to conduct the local area where the touch part should be conducted, and the touch is reliable. If the insulating part should not be conducted, it is necessary to insulate it firmly. There are three common fatal problems in terminal blocks:
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Analysis of the fault problem of LS power terminal block
From the point of view of application, the function of the terminal block should be achieved: it is necessary to conduct the local conduction of the touch part, and the touch is reliable. The insulating part should not be conducted, and it is necessary to insulate it firmly. There are three common forms of fatal problems in terminal blocks:
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Grounding of the secondary side of the voltage transformer and the current transformer - power generation
1. The transformer is grounded twice
It refers to the grounding of the S2 terminal of the current transformer or the ground of the n terminal of the voltage transformer. As long as the single point is grounded, because the transformer is blocked between the second and the first, before grounding, the secondary winding has no potential connection with the ground, after grounding, the transformer ...
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Explanation of basic terms of electrician - electricity production
1. Active power - in the process of generating and transmitting alternating current energy, the part of energy used to convert into electromagnetic methods is called active power
2. Reactive power - in the process of AC electric energy generation and transmission, it is used for electromagnetic field AC in the circuit.
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Quickly locate the fault method of switching power supply - LS power generation
Due to the short circuit of the load, the failure of the self-oscillation circuit and the loss of control of the protection circuit, the switching power supply will cause the base of the switch tube to be unable to get the switching pulse and intermittent operation, which makes it difficult to locate the shortcomings of SMPS. The difficulty of the repair operation and the improper method will expand the shortcomings, constituting the phenomenon of continuous burning of the switch pipe, etc., ...
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An integral part of an electrical solid state relay
Solid state relays consist of three parts: the input circuit, the barrier (coupling), and the output circuit.
Input Circuit:
According to the different categories of input voltage, the input circuit can be divided into DC input circuit, communication input circuit and AC-DC ...
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Inverter applications and common loads – LS generates electricity
1. Air conditioning load
Office buildings, shopping malls and some supermarkets and factories have central air conditioning, and the electricity consumption of air conditioning is very large during the peak electricity consumption in summer. In hot weather, the electricity consumption of air conditioners in Beijing, Shanghai and Shenzhen accounts for more than 40% of peak electricity. Therefore, with inverter equipment, drag the air conditioning system ...
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LS inverter frequency conversion mode
1. The operator panel is given The operator panel is a simple frequency setting method of the inverter, and the user can directly change the set rate of the inverter through the potentiometer, digital key or rising and descending keys on the inverter operator panel. The big advantage of the operator panel is that it is simple ...
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Electromagnetic interference caused by the working principle - LS power inverter
1. Harmonic disturbance
The rectifier circuit will produce harmonic current, which produces a voltage drop on the impedance of the power supply system, resulting in distortion of the voltage wave pattern, and the voltage of this distortion constitutes a disturbance on many appearances, and the common voltage distortion is the flattening of the top of the sine wave. Harmonic wave...
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The matrix alternating control mode of the inverter - LS power generation
VVVF frequency conversion, vector control frequency conversion, and direct torque control frequency conversion are all one of the AC-DC-AC frequency conversion. One of the disadvantages is that the input power factor is low, the harmonic current is large, the DC circuit needs a large energy storage capacitor, and the regenerative energy cannot be reflected back to the grid, that is, it cannot carry out four-quadrant operation.
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The difference between input reactor and output reactor – LS produces electricity
The rectifier part of the general inverter selects the diode uncontrollable bridge rectifier circuit, and the middle filter part selects the large capacitor as the filter, so the input current of the rectifier is actually the charging current of the capacitor, and the harmonic component is relatively steep and steep.
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Inverter carrier frequency adjustment method - LS power generation
A． The output voltage of the SPWM inverter is a series of pulses, and the pulse frequency is equal to the carrier frequency.
B. In the current of the motor, there is a harmonic component with a strong carrier frequency, which will cause the vibration of the motor core and announce the noise. If the frequency of the noise is the same as that of the motor core.
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