In order to control the voltage in the network, electronic rectifiers are used. These devices work by changing the frequency. Many modifications are allowed to apply to AC power.
К основным параметрам выпрямителей относится conductivity Also it is necessary to consider the indicator of permissible overvoltage. In order to understand the issue in more detail, it is necessary to consider the rectifier circuit.
Device modifications
Rectifier circuit involves the use ofcontact thyristor. The stabilizer is usually used as a transitional type. In some cases, it is installed with a security system. There are also many modifications on triodes. These devices operate at a frequency of 30 Hz. For collectors, they are well suited. The rectifier circuit also includes low conductivity comparators. Their sensitivity corresponds to at least 10 mV. A certain class of devices is equipped with a varicap. Due to this modification can be connected to a single-phase circuit.
How it works?
As mentioned earlier, the rectifier works forfrequency change account. Initially, the voltage hits the thyristors power. The process of current conversion is carried out using a triode. To avoid overheating of the device, there is a stabilizer. When the wave interference in the work turns on the comparator.
Device scope
Most often devices are installed intransformers. There are also modifications for drive modules. Do not forget about automated devices that are used in production. In modulators, rectifiers play the role of a voltage regulator. However, in this case, much depends on the type of device.
Existing types of modifications
By design semiconductor secretethyristor and bridge modifications. A separate category includes power devices that can operate at higher frequencies. Full-period models are not suitable for this purpose. Additionally, rectifiers are distinguished by phase. Today one can meet one-, two- and three-phase devices.
Semiconductor models
Semiconductor rectifiers wonderfulsuitable for step-down transformers. Many modifications are based on connector capacitors. Their input conductivity does not exceed 10 microns. It is also worth noting that semiconductor rectifiers differ in sensitivity. Devices up to 5 mV are capable of being used at a voltage of 12 V.
Their protection systems are of class P30.Adapters are used to connect modifications. At a voltage of 12 V, the reload parameter is on average 10 A. Modifications with plates are distinguished by a high parameter of the operating temperature. Many devices are able to work on transistors. Filters are used to reduce distortion.
Features of thyristor devices
Thyristor rectifier is designed toadjust the voltage in the DC network. If we talk about modifications of low conductivity, then they use only one triode. The limiting voltage when loading at 2 A is not less than 10 V. The protection system of the presented rectifiers is used, as a rule, of class P44. It is also worth noting that the models are well suited for power conductors. How does a transformer work on thyristor rectifiers? The first voltage goes to the relay.
DC conversion occursthanks to the transistor. To control the output voltage used capacitor units. Many models have several filters. If we talk about the shortcomings of rectifiers, then it is worth noting that they have high heat losses. When the output voltage is above 30 V, the overload rate is significantly reduced. Additionally, it is necessary to take into account the high price of a thyristor rectifier.
Bridge modifications
Bridge rectifiers operate at a frequency notmore than 30 Hz. The angle of control depends on the triodes. Comparators are mainly mounted through diode conductors. For power equipment models are not suitable in the best way. For modules, stabilizers with a low-resistance adapter are used. If we talk about the minuses, then you should take into account the low conductivity at high voltage. Protection systems are usually applied class P33.
Many modifications are connected via dipole.triode. How does the transformer work on these rectifiers? Initially, the voltage is applied to the primary winding. At a voltage above 10 V, the converter is turned on. The frequency change is carried out using a conventional comparator. In order to reduce heat losses, a varicap is installed on a bridge controlled rectifier.
Power devices
Power rectifiers are recently consideredvery common. The overload indicator at low voltage does not exceed 15 A. Their protection system is mainly used in the P37 series. Models are used for step-down transformers. If we talk about design features, it is important to note that the devices are available with pentodes. They are distinguished by good sensitivity, but they have a low operating temperature parameter.
Capacitor blocks are allowed to apply on 4micron Output voltage over 10 V uses a converter. Filters are usually used on two insulators. It is also worth noting that there are many rectifiers on the market with controllers. Their main difference lies in the ability to work at a frequency of over 33 Hz. At the same time overload corresponds to an average of 10 A.
Full-wave modifications
Full-wave single phase rectifier capablework at different frequencies. The main advantage of the modifications lies in the high parameter of the working temperature. If we talk about design features, it is important to note that power thyristors are used integral type, and their conductivity does not exceed 4 microns. At a voltage of 10 V, the system produces an average of 5 A.
Protection systems are often used seriesP48. Connecting modifications through adapters. Also worth noting the disadvantages of rectifiers in this class. First of all, it is low susceptibility to magnetic oscillations. The overload parameter can sometimes change quickly. At a frequency below 40 Hz, current drops are felt. Experts also note that models are not able to work on a single filter. Additionally, field-effect transistors are not suitable for devices.
Single phase devices
Single phase controlled rectifier capableperform many functions. Install the model most often on power transformers. At a frequency of 20 Hz, the overload parameter does not exceed an average of 50 A. The protection system for rectifiers is used in class P48. Many experts say that models are not afraid of wave interference and do an excellent job with pulsed jumps. Are there any drawbacks to this type of model? First of all, they relate to low current at high load. To solve this problem, comparators are installed. However, it should be borne in mind that they can not work in the AC circuit.
Additionally, periodically there are problems withconduction current. On average, this parameter is 5 microns. Lowering the sensitivity greatly affects the performance of the triode. If we consider single-phase unmanaged rectifiers, then the plates they are used with an adapter. Many models have several insulators. It is also worth noting that rectifiers of this type are not suitable for step-down transformers. Stabilizers are most often applied to three outputs, and their limit voltage should not exceed 50 V.
Parameters of two-phase devices
Двухфазные выпрямители производятся для цепей DC and AC. Many modifications are operated on contact type triodes. If we talk about the parameters of the modifications, it is worth noting the low voltage at high overloads. Thus, devices are poorly suited for power transformers. However, the advantage of devices is considered to be good conductivity.
The sensitivity of the models starts from 55 mV.At the same time, heat losses are insignificant. Comparators are applied on two plates. Quite often, modifications are connected through one adapter. In this case, the insulators are pre-checked for output resistance.
Three phase modifications
Three-phase rectifiers are actively used onpower transformers. They have a very high overload parameter, and they are able to work in high frequency conditions. If we talk about design features, it is important to note that the models are assembled with capacitor units. Due to this modification, it is allowed to connect to the DC circuit and not be afraid of wave interference. Pulse jumps are blocked by filters. Connection via adapter is carried out using a converter. Many models have three isolators. Output voltage at 3 A should not exceed 5 V.
Additionally, it is worth noting that rectifiersThis type is used for large network overloads. Many modifications are equipped with locks. The frequency reduction occurs with the help of comparators, which are installed above the capacitor box. If we consider the relay transformers, then to connect modifications, an additional adapter is required.
Models with contact comparator
Managed rectifiers with contact comparatorrecently in great demand. Among the features of the modifications worth noting a high degree of overload. Protection systems are mainly applied class P55. Work devices with a single capacitor box. At a voltage of 12 V, the output current is at least 3 A. Many models can boast of high conductivity at a frequency of 5 Hz.
Stabilizers are often usedlow impedance type. They do well in the AC circuit. In the production of rectifiers used for power transformers. The permissible level of conductivity in them is no more than 50 microns. The working temperature in this case depends on the type of dynistor. As a rule, they are installed with several plates.
Devices with two comparators
Electronic rectifiers with two comparatorsvalued for high output voltage setting. With an overload of 5 A, modifications are able to work without heat losses. The smoothing factor for rectifiers does not exceed 60%. Many modifications have a high-quality protection system of the P58 series. First of all, it is designed to cope with wave interference. At a frequency of 40 Hz, devices emit an average of 50 microns. Tetrodes for modifications are of variable type, and their sensitivity is equal to no more than 10 mV.
Are there any drawbacks to this type of rectifier?First of all, it should be noted that they are forbidden to be connected to step-down transformers. In the DC network, the models have a small conductivity parameter. The working frequency on average corresponds to 55 Hz. Modules are not suitable for single-pole stabilizers. To use devices on power transformers, two adapters are used.
Difference modifications with electrode triode
Controlled rectifiers with electrode triodesvalued for high output voltage setting. At low frequencies, they work without heat loss. However, it should be borne in mind that the overload parameter is on average 4 A. All this suggests that rectifiers are not capable of operating in a DC network. Filters are allowed to apply only on two plates. The output voltage usually corresponds to 50 V, and the protection system is used class P58. In order to connect the device, an adapter is used. The smoothing factor for this type of rectifier is at least 60%.
Capacitive Triode Models
Capacitive triode controlled rectifiersable to work in a DC network. If we consider the parameters of modifications, we can note the high input voltage. In this case, the overload during operation will not exceed 5 A. The protection system used is class A45. Some modifications are suitable for power transformers.
In this case, much depends on the capacitorunit that is installed in the rectifier. According to experts, the nominal voltage of many modifications is 55 V. The output current in the system is 4 A. Filters for modifications are suitable for alternating current. The smoothing factor for rectifiers is 70%.
Channel Triode Devices
Controlled rectifiers with channel triodesThey have a high degree of conductivity. Models of this type are great for step-down transformers. If we talk about the design, it is worth noting that the models are always produced with two connectors, and the filters they use are used on insulators. According to experts, the conductivity at a frequency of 40 Hz does not change much.
Are there any drawbacks to these rectifiers?Heat loss is the weak side of modifications. Many experts note the low conductivity of the connectors, which are installed on the rectifiers. To solve the problem, apply kenotrony. However, they are not allowed to be used in a DC network.
Difference modifications
Выпрямители на 12 В используются только для step-down transformers. Comparators in devices are installed with filters. The maximum overload of modifications is no more than 5 A. Protection systems are quite often used in class P48. To overcome the wave interference, they are great. Still often used converting stabilizers, which have a high smoothing factor. If we talk about the shortcomings of the modifications, it is worth noting that the output current in the devices is no more than 15 A.
