The difference between the voltage type and the current type of inverter - Reynolds

Create Date: 2024-8-30 12:03:23|Source: RENLE/RENOLDS

Energy storage elements are different, the voltage type energy storage element is a capacitor, and the current type is an inductor. In fact, the general inverter uses power electronic circuits, which is a process of communication to DC - DC energy storage - DC to communication. It is also commonly said that the rectification link - energy storage link - inverter link. The general control link is in the inverter, unless it is a four-quadrant inverter, which is to be used for feedback to the power grid, and the structure of the rectification and inverter will be the same. Otherwise, thyristors are generally used for rectification, and IGBTs are used for inverter. Anyway, the final control is to control the converter, and the difference between the voltage type and the current type is as follows:

The difference between the voltage type and the current type of inverter - Reynolds

1. Energy storage components: voltage-type inverters - capacitors; Current type - reactor.

2. Characteristics of the output waveform: the voltage waveform is a rectangular wave, and the current waveform is similar to a sine wave; The current type inverter is a current wave, a rectangular wave, and a voltage waveform is an approximate sine wave

3. The characteristics of the circuit composition, the voltage type has a reaction diode DC power supply in parallel with a large-capacity capacitor (low impedance voltage source); The current type non-reactive diode, DC power supply, series large inductance (high impedance current source), motor four-quadrant operation, simple operation.

4. In terms of characteristics, the voltage type is overcurrent when the load is short-circuited, and the open-loop motor may also run stably; The current type can suppress the overcurrent when the load is short-circuited, and the motor operation is unstable and needs to be reacted and controlled.

The current inverter uses a naturally commutated thyristor as the power switch, and its DC side inductance is more valuable, and is used in doubly-fed speed regulation, which requires a commutation circuit when oversynchronous speed, and the function is relatively poor under the condition of low slip frequency.

More on that

	Reynolds inverter code function description F09 second acceleration time 0.10 - 999.9sec; 5.0sec； △ The acceleration and deceleration parameters and the second acceleration and deceleration parameters are switched by terminal X3 (see F55); F10 second deceleration time 0.10 - 999.9sec; 5.0sec； △Acceleration and deceleration parameters and the second acceleration and deceleration parameters are switched ...
	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 ...
	The Reynolds booth was presented at the Industrial Automation Exhibition Center in Parma, Italy Shanghai Reynolds Technology Co., Ltd. is an enterprise specializing in the design and production of high and low voltage soft starters, high and low voltage variable frequency speed regulation, intelligent electrical, new energy electrical and high and low voltage power transmission and transformation equipment, which are widely used in electric power, metallurgy, petroleum and petrochemical, military, mining, chemical industry, ...
	The relationship between Reynolds motion control and frequency converters Motion control has obvious period characteristics, it is a variety of high-tech generalization, used to push industrial automation, office automation and home automation to a higher stage. Nowadays, motion control is mainly composed of variable frequency drive (VFD), electric motor, control ...
	Inverter selection conditions and precautions - Reynolds 1. When selecting the inverter, select the inverter with the appropriate control method according to the load characteristics In addition to the inverter manufacturing process, it is also important to choose which control method of the inverter. The control method of the inverter is mainly divided into two types: open-loop control and closed-loop control. In the meantime, the open-loop control method ...
	Key points for the selection of AC contactors - Reynolds 1. Select varieties according to the above series according to the purpose and requirements of use Note that the main circuit load type is strictly differentiated, whether it is DC or communication. The communication contactor is different from the DC contactor, and is only suitable for DC-1 to DC-5 loads when used for DC loads.
	Inverter dust handling – Reynolds inverters 1. Plan a special inverter room: When the power of the inverter used is large or the number is large, a special inverter room can be planned. The doors, windows and cable holes in the room should be sealed to prevent dust from entering; It is necessary to plan air filtration equipment and circulation channels to adhere to the normal circulation of indoor air ...
	The breaking capacity of the industrial control appliance switch Assuming Icu=60KA, then when a faulty current of 60KA is generated in the line, the circuit breaker can safely cut off the circuit without abnormal conditions such as contact welding and blasting. Pay attention to the extreme breaking ...
	The cause of overheating of servo motor bearings - Reynolds The motor itself: 1) The inner and outer rings of the bearing are too tightly cooperated. 2) There are problems with the shape and position tolerance of parts, such as the coaxiality of parts such as machine base, end cover, shaft and other parts is not good. 3) Improper selection of bearings. 4) The bearing is not smooth or the bearing is not clean, and there are impurities in the smooth grease. ...
	The soft starter output is out of phase fault Soft Starter Repair Problem: F 04 (Input Phase Loss): There are several factors that cause this problem, some of which are listed below: (1) Check whether the wiring between the incoming power supply and the motor is loose; (2) Whether the output is connected to the load, and whether the load is matched with the motor; (3) ...
	Introduction to the function of the inverter - Reynolds inverter In power distribution equipment such as voltage distribution cabinets and switchgear at all levels of power plants and substations, the conductors connected between large electrical equipment such as generators and transformers and various electrical equipment are called busbars. Busbars, also known as busbars, are used to collect, distribute, and transmit electrical energy. The connection methods of the bus bar are ...
	Reynolds inverter code function description F09 second acceleration time 0.10 - 999.9sec; 5.0sec； △ The first acceleration and deceleration parameters and the second acceleration and deceleration parameters are switched by terminal X3 (see F55); F10 second deceleration time 0.10 - 999.9sec; 5.0sec； △ The first acceleration and deceleration parameters and the second acceleration and deceleration parameters ...
	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. ...
	PLC and inverter communication mode 1. The switching signal of PLC controls the inverter The PLC can control the start, stop and reset of the inverter through the program; It can also control different combinations of high-speed, medium-speed and low-speed terminals of the inverter to achieve multi-stage speed operation. However, because it is controlled by switching ...
	Elimination of inverter harmonics method – Reynolds a. Add the internal impedance of the power supply of the inverterIn general, the internal impedance of the power supply equipment can play a role in buffering the reactive power of the DC filter capacitor of the inverter. This internal impedance is the short-circuit impedance of the transformer. When the power supply capacity is smaller than the inverter capacity, the internal impedance value is relatively large.
	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 ...
	The main circuit of the inverter is composed of Reynolds When it comes to inverter repair, it's not enough to understand the above fundamental circuits, but also to understand the following primary circuits. The main circuit is mainly composed of rectifier circuit, current limiting circuit, filter circuit, braking circuit, inverter circuit and detection and sampling circuit. ...
	Reynolds high-speed permanent magnet synchronous motor dedicated driver The state proposes to "peak carbon emissions" by 2030 and complete "carbon neutrality" by 2060. Carbon neutrality is to try to reduce carbon dioxide emissions, and eventually achieve net zero emissions, that is, to make carbon dioxide emissions even offset. However, due to economic development, CO2 emissions are stable ...
	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 ...
	Reynolds inverter control panel and code function description 1. Clarification of the function of the control panel 1. FUN button; Press the FUN button to enter the settings menu F00; 2. Press and hold the up or down button to scroll to the code you need to set; 3. At this moment, press the FUN button to confirm, and adjust the entry parameters to the required value; 4. After the adjustment is completed, ...