The power supply voltage stabilizer can automatically adjust the output voltage of the power supply circuit or power supply equipment and can stabilize the power supply voltage required by the electrical equipment within its set value range. The servo voltage regulator works in the voltage stabilizing system controlled by the servo motor through the buck/boost transformer. In a servo voltage stabilizer, changes in the output voltage controlled by the motor change the taps on the transformer to keep the output at a constant voltage. Through the servo voltage regulator, if the power supply voltage fluctuates by 50%, the output can be kept within 1%.
The servo regulator works on the servo mechanism. The servo mechanism is negative feedback, which is used to control the voltage fluctuation. In the servo regulator, there is a step-up/step-down transformer component, which is mainly used to regulate and control the input voltage. The servo AC voltage regulator is characterized in that the voltage regulator has an automatic return circuit. When the input mains power is lower than 200V and it is shut down or powered off, the brush returns to a position close to 260V on the line pack. When the input mains power is higher than At 200V, whether it is shut down or power failure, the brush will stop in the state before shutdown.
The main components of the servo control regulator are dimmer (variable transformer), carbon brush, servo motor-synchronous motor, step-down boost transformer (series transformer), contactor or relay, MCB, or MCCB, electronic circuit.
1. Dimmer (Variable Transformer)-Silicon CRGO ring core is used for foundation and copper wire and uses a specific turns ratio according to capacity. The basic purpose of the dimmer is to increase or decrease the voltage fed to the buck-boost transformer. Only the dimmer can increase or decrease the output voltage by 50%.
2. Carbon brush-the moving part of the servo stabilizer, installed on the shaft to contact the dimmer. If the input voltage changes very frequently, the carbon brush will be erased as soon as possible, and the customer must replace it very frequently. Servo stabilizer manufacturers should use the highest quality carbon brushes.
3. Servo motor (synchronous motor)-The servo motor, as the name suggests, is the main part of the servo stabilizer. The motor rotates the mechanical arm connected to the dimmer clockwise or counterclockwise according to the input voltage.
4. Buck Boost Transformer -Bobin is equipped with EI CRGO core. After constructing the transformer structure, immerse it in a varnish tank to provide additional protection.
Before the servo stabilizer is ready for regression testing, this insulating varnish (also called transformer varnish) is placed on all windings used in the buck/boost transformer to encapsulate it. Transformer varnish can extend the life of the coil and protect the transformer winding from the external environment, otherwise, it will be damaged due to vibration. The varnish can be used as an insulator for any coil. Although there are transformers in the isolation transformer, it is different from the buck-boost transformer
5. The contactor-The function of the contactor is to cut off the output of the servo stabilizer when the specified limit is exceeded.
6. MCB, MCCB-MCB is used to turn on/off the servo stabilizer and provide short circuit protection, while MCCB is usually used for overload protection.
7. Electronic circuit-as the name implies, it will send signals to various parts of the servo stabilizer, such as motors, dimmers, etc., so it will work according to the signal and play its role to correct the voltage.
A voltage regulator is a device that stabilizes the output voltage. It consists of a voltage regulator circuit, a control circuit, and a servo motor. When the input voltage or load changes, the control circuit performs sampling, comparison, and amplification, and then drives the servo motor to rotate to change the position of the carbon brush of the voltage regulator, and automatically adjusts the coil turns ratio to maintain the stability of the output voltage. The core is an AC voltage regulator transformer (automatic voltage regulator). A servo motor is controlled by a control circuit to drive the voltage regulator to automatically adjust the voltage. The intelligent automatic regression circuit is installed, which thoroughly solves the problem of large current when starting up, and extends the service life of the regulator.
The electronic servo uses the electronic circuit to detect the high and low of the output voltage to control the forward and reverse rotation. When the voltage is low, the forward rotation is used to increase the output voltage. When the voltage is high, the output voltage is reversed to reduce the voltage to achieve the regulation effect. The setting is ?%~5% depending on the load requirements. The advantages of the servo type: the input voltage range is large, and the manufacturing capacity can be from 1KVA to 300KVA.The cost and selling price are more economical than the electronic type. Most servo regulators are produced The technology is all three-phase modulation, although it can stabilize the voltage, it can not change the three-phase unbalanced situation, it is easy to increase the temperature of the magnetic wire group, and it will cause a fire in serious cases. The electronic servo type of Dongli Motor adopts the most advanced three-phase modulation Technology, separately adjust the three-phase voltage, there is no three-phase imbalance.
The voltage stabilizer is to convert the fluctuating voltage into stable electrical and electric equipment. The voltage regulator has an input voltage adaptation range. The IEC standard is that the input voltage changes within the range of the rated value. If it exceeds the range, it will automatically sound and light alarm and cannot stabilize the output voltage within the required range.
The voltage that the voltage stabilizer can stabilize is not all the voltage fluctuation width can bear and can be stable(automatic voltage stabilizer:11 relay-type automatic voltage regulators that sell well). Both the voltage regulator and the voltage fluctuation have a range value, which is the voltage input range value of the voltage regulator. The larger the range value of the voltage regulator, the higher the stable voltage fluctuation range.
The power regulator is composed of a voltage regulator circuit, a control circuit, and a servo motor. When the input voltage or load changes, the control circuit samples, compares, and amplifies, and then drives the servo motor to rotate to change the position of the regulator carbon brush. , By automatically adjusting the turns ratio of the coil, the output voltage is kept stable. Larger capacity AC voltage regulators also work on the principle of voltage compensation.
The regulator is mainly divided into two categories from the structure:
The first is a manual voltage regulator: the sub-category products are the cheapest because they are inconvenient to operate and have been eliminated.
Polar automatic voltage regulator: The high-end voltage regulator is controlled by a servo motor. Its advantages are that there is no instantaneous power failure, the output voltage is stable, and the general voltage regulation accuracy is 3-5%, which is suitable for high-end Electrical appliances with high voltage requirements, such as computers and test equipment. Such as SVC series automatic high-precision voltage regulator.
Relay-type automatic voltage regulator: the relay is used to adjust the output voltage, the voltage fluctuation is large, and the accuracy is relatively low. Used for mid-range voltage regulators, such as TM series high-power automatic AC voltage regulators. These products have high stability and low price and are suitable for devices with low voltage accuracy requirements.
According to time, the following types of voltage regulators appear: ferromagnetic resonance AC regulator, magnetic amplifier AC regulator, sliding AC regulator, inductive AC regulator, thyristor AC regulator, large Power-compensated AC regulator, etc.
Ferromagnetic resonance type AC voltage stabilizer: an AC voltage stabilizing device made by combining ferromagnetic saturation elements and resonance capacitors with constant voltage volt-ampere characteristics. Magnetic saturation is the early typical structure of this regulator. The structure is simple, the manufacture is convenient, the work is reliable, and the input voltage is allowed to vary widely. However, the distortion of the output waveform is large, and the stability is not high, which is called a nonlinear AC regulator.
Magnetic amplifier type AC voltage regulator: it is composed of an autotransformer, magnetic amplifier, electronic detection, control loop, and other parts. This type of voltage regulator has a feedback control function, so it has high stability and good output waveform. It is called a linear AC voltage regulator. However, due to the use of a magnetic amplifier with large inertia, this type of AC voltage regulator has a slower response and recovery time. long.
Sliding AC voltage stabilizer: A device that stabilizes the output voltage by changing the position of the sliding contact of the transformer. It controls a servo motor by the control circuit and drives the voltage regulator to automatically adjust the AC voltage regulator. This type of regulator has high efficiency, good output voltage waveform, and no special requirements on the nature of the load.
4. Inductive AC voltage stabilizer: By changing the phase difference of the transformer secondary voltage relative to the primary voltage, a device for outputting a stable AC voltage is obtained. It is similar in structure to the wire-wound asynchronous motor. It has a wide voltage stabilizing range, a good output voltage waveform, and large power, but it is slow in response, bulky and bulky, and the rotor is often in a stalled state, so the power consumption is large and the efficiency is low.
5. AC regulator of thyristor: AC regulator using thyristor as a power adjustment component. It has the advantages of fast response, no noise, high power, and high stability. However, it damages the mains waveform, pollutes the power grid, and interferes with communication equipment and electronic equipment.
Compensating AC voltage stabilizer: This kind of voltage stabilizer is also called partial adjustment voltage stabilizer（ac voltage stabilizer characteristics & installation environmental condit）. The additional voltage of the compensation transformer is connected in series between the power supply and the load. With the input voltage level, a continuous servo motor is used to drive the slippage of the compensation transformer or the number of turns of the transformer primary coil is changed by an algorithm to change the size of the additional voltage or Polarity, the part of the input voltage that is higher than the input voltage is subtracted, and the part of the input voltage that is insufficient is added to achieve the purpose of stabilizing the output voltage. Now the non-contact voltage regulator simply says that the response speed is fast.
1. When the electrical equipment is not used for a long time, please turn off the power switch of the electrical equipment to reduce power consumption and extend the life of the regulator.
2. The wire connected to the voltage regulator should have enough load surface to prevent heating and reduce voltage drop. Voltage stabilizers with a capacity of more than 2KVA are connected by terminals. Single copper wire should be selected, and the terminal screws should be tightened as much as possible to prevent the connection from heating.
3. The voltage regulator shall not be overloaded. When the mains voltage is low, the output capacity decreases, and the load on the regulator should be reduced accordingly.
4. Whether it is a single-phase or three-phase voltage regulator, after connecting all input and output lines, you should first turn off the power switch of the load, then turn on the regulator, check the output voltage is normal, and then turn on the power switch of the load.
5. When choosing electrical appliances such as refrigerators, air conditioners, water pumps and other equipment with motors running, a voltage stabilizer with a capacity of more than 3 times should be selected to avoid the equipment starting current exceeding the voltage stabilizer fuse current or overcurrent protection circuit breaker current to stabilize the voltage. The fuse of the circuit breaker blows or the circuit breaker trips or the voltage drop is too large to work.
The application scope of the power regulator is still relatively wide. It is used in large electromechanical equipment, metal processing equipment, production lines, construction engineering equipment, elevators, medical equipment in the fields of industry, agriculture, transportation, post and telecommunications, military, railway, scientific research, and culture, etc. , Embroidery and textile equipment, air conditioners, radio and television, household appliances, lighting, etc. need to stabilize all power consumption occasions.