Thyristor voltage regulatorAlso called“ThyristorPower regulator "," silicon controlled power regulator "or short for“Power regulator”。Thyristor“Silicon controlled rectifier”（SCR）It is a four layer three terminal semiconductor device, which can be connected between the power supply and the load, and matched with the corresponding trigger control circuit board to adjust the voltage, current and power applied to the load.
Also known as "SCR" is a four layer three terminal semiconductor device, which is connected between the power supply and the load and equipped with a phase
Voltage regulator
The voltage, current and power applied to the load can be adjusted by triggering the control circuit board.
Melting furnace, rolling furnace, vacuum furnace,Trolley electric furnace, quenching electric furnace, aging electric furnace, hood type electric furnace, atmosphere electric furnace, oven
Production equipment, metallurgical machinery and equipment, petrochemical machinery, lighting smooth adjustment, constant voltage, constant current, constant power control and other fields.
Principle of contact type auto voltage regulator
Voltage regulator
The voltage regulator is the 14th batch of electromechanical industryEnergy saving products。Used for voltage regulation, temperature control, speed regulation, light adjustmentpower control It is widely used in many places.
The column type electric voltage regulator hasoutput voltage Undistorted waveform (waveform distortion rate increment of output voltage ＜ 1%), column type electric voltage regulator adoptsElectric operating mechanism, ease of operationlabour intensity。The output power can be adjusted from zero voltage, instantaneousOverload capacityStrongNo load current、No-load lossSmall, high efficiency, low noise and long service life.It is suitable for various inductive, capacitive and resistive loads.Widely used in chemical industry, metallurgy, instrumentationMachinery manufacturing, light industry, public equipment, household appliances, etc.Contact voltage regulatorUsage
Voltage regulator
The contact voltage regulator is essentially an adjustable output (terminal) voltageAutotransformer, coils of auto voltage regulators with different capacitiesDC resistanceDifferent, but usually small.0.4 Ω cannot be used as the basis for judging whether it is burnt out.
Electric column type voltage regulator
Voltage regulator
The electric column type voltage regulator is a contact type auto couplingVoltage regulating transformer。It is a kind of electrical equipment that can smoothly and steplessly adjust the load voltage within the rated voltage range.This seriesProduct optimizationStructural designHigh quality electromagnetic materials are used and type A imported from the UK is used in key voltage adjustment partsbrush。Plus strictQuality Assurance, making it small in size, light in weightWaveform distortionSmall, low noise, small air losstemperature riseLow voltage, smooth voltage regulation and long service life.
three-phaseThe structure of the induction voltage regulator is shown in Figure 1.Its rotorwindingIt is connected into a star as the original winding;As a secondary winding, one end of the stator winding is connected to the rotor winding, and the other end is connected to the load.Output voltage technology 2 is stator and rotor circuitemfSum of class 1 and class 2 (ignore the leakageImpedance voltage drop）, that is, output voltage technology 2amplitudeIs the formula, isTransformation ratio。
If the rotor position is changed, the angle is changedαTo make the secondary side output voltageU2 Get smooth adjustment.output voltage Maximumandminimum valueSingle phaseInduction voltage regulatorThe structure and voltage regulating function are similar to three-phase induction voltage regulator, but its stator and rotor are single-phase windings.
Since the induction voltage regulator has noSliding contact, so the operation is very reliable.However, it only rotates one angle during pressure regulation, and does not rotate continuously, so the heat dissipation condition is poor.Air cooling can be used for those with small capacity, and oil cooling is required for those with large capacity.Weight of induction voltage regulatorexcitation current And loss are greater thanAutotransformer。
Autotransformer
Voltage regulator
Essentially, it is a continuously adjustable voltageAutotransformer。hiscoreThere are two types: ring type and column type.The column iron core is similar to the general transformerSilicon steel sheetsSuperimposition;Ring coresilicon steelTape reelCheng.For small capacity autotransformer regulators of 20kVA and below, ring type iron cores are mostly used;Column iron core is mostly used for those with capacity more than 20kVA.In the structure of the ring type autotransformer, the winding is wound on the ring type iron core with a single layer of insulated copper wire.The surface of coil part is polished offInsulation layerThe brush made of electrified graphite contacts with the smooth surface.The brush can rotate and slide on the surface of the wire by means of a hand wheel, thereby changing the output voltage.If the current capacity is greater than 10A, two or more brushes are used in parallel.
Autotransformer regulators are generally made of self cooling and dry type.When the capacity is particularly large orUse environmentSpecial occasions, also made ofOil immersionSelf cooled.
Three ring type single-phase auto coupling voltage regulators can be assembled in a coaxial manner to form a three-phase auto coupling voltage regulator.
Moving coil regulator
Voltage regulator
The structure and principle are similar to that of transformer.It passes through a moving coil with self short circuit on the same iron coreIron core pillarMove up and down to change the other twoTurnsThe impedance and voltage distribution of the coils that are equal but in series with opposite phases, regulate the output voltage.
Figure 2 shows the wiring principle of the moving coil voltage regulator.The iron core of voltage regulator is single-phase, single column, two side yoke type, and sometimes three side yoke type.It has aMain coil1a and an auxiliary coil 1b, both of which have equal turns
Voltage regulator
The weighing floor is sheathed on the upper and lower halves of the iron core column,Reverse series connection。The main coil 1a and coil 2 are self coupled to formAutotransformerForm.Coil 3 is a moving coil with its own short circuit, which is sleeved outside coils 1a, 1b and 2.The position of the moving coil can be changed by means of the transmission mechanism, so that the output voltage can be adjustedU2。
Change the connection between moving coil, main coil and auxiliary coilrelative position, thenimpedanceThe supply voltage changes accordinglyU1. It is distributed on the main coil and auxiliary coil according to the impedance.When the moving coil is completely coincident with the main coil, the impedance of the main coil is the minimum, while the impedance of the auxiliary coil is the maximum,U2 minimum;On the contrary, when the moving coil is completely coincident with the auxiliary coil,U2 is the maximum.When the moving coil moves gradually from top to bottom,U2 will gradually increase from 0 to the maximum value.
If three moving coil voltage regulator units are installed on the same base and share a transmission mechanism, they can be connected into a three-phase moving coil voltage regulator according to the three-phase connection method (generally Y connection method).
