Dedicated AC voltage regulator
1, anti-interference AC parameters regulated power supply
AC parametric regulated power supply, also known as constant voltage transformer (Constant Voltage Transformer) abbreviated CVT, the basic principle is to use the ferromagnetic resonance principle made of functional converters, a special structure of the iron core placed in a linear inductance, saturation inductance and compensation of the inductance coil, to achieve their respective functions. The primary core will apply the linear segment of the core magnetisation curve, while the secondary core is selected to have a shallow saturation region of magnetic characteristics. When the input voltage rises again, it magnetic field does not affect the saturated iron core, so as to achieve the purpose of voltage regulation. This kind of power supply structure is unique and simple, stable and reliable security, voltage regulator range is wide. When the input voltage varies ± 20%, the output voltage varies ± 3%, overload protection capability; when the load short circuit, the output voltage automatically drops to ensure the safety of the equipment, the input and output safety isolation, there is no direct electrical connection, shielding and absorption function, the hundreds of hertz to tens of thousands of hertz impulse interference signals have a good bi-directional suppression and attenuation, common mode suppression ≥ 50dB. In addition, one of the very important features Is to inhibit grid harmonics effect is obvious, the voltage waveform to a significant improvement, the third harmonic reduction rate of 90% or more, on the 5, 6, 7, 8, 11 and other odd and even harmonics have obvious improvement, especially for harmonic pollution in the line of a variety of instrumentation in the serious power supply, can also be used for precision equipment in the control system power transformer.
Technology and process level, the machine noise level is greatly reduced, CVT noise and affect the use of the current can be used with confidence.
2,Stabilised and harmonic suppression of new AC power supply
At present, the grid harmonic suppression has become a very important task of the power supply sector. In recent years, the development of power electronics technology, active power filtering is to become a solution to the power grid voltage distortion of the most promising filtering methods. The use of series-type active power filtering method, has developed a new type of power supply to regulate and inhibit harmonics, called series power quality controller ( SPQC: Serial Power Quality Controller ), similar to foreign countries called voltage dynamic restorer. The product can both regulate voltage and suppress grid harmonics, also known as voltage regulator filter. This voltage regulator can also be three-phase unbalanced voltage flicker, dips, surges, spikes and so on dynamic compensation, utility voltage instability, and with harmonic contamination, the instrument instantaneous dynamic voltage compensation, the load on the pure three-phase sinusoidal balanced voltage.
3,Medical special power supply
Medical system CT machine has been widely used in hospitals, if the power supply is not properly configured, resulting in poor resolution of CT film, which brings difficulties to the doctor's diagnosis, but also the possibility of misuse of the condition. CT machine itself using power supply characteristics: First, the lesion burst when the requirements of the regulated power supply output current is large, the voltage drop is small, this instant does not regulate; Second, the CT itself has a rectifier circuit, generating harmonics, the impact of the regulated power supply action control is not Correct, more than ten years for GE-CT supporting power supply experience, regulated power supply to reduce the internal resistance, the output to increase harmonic filtering devices and control circuits to increase the locking function and surge absorption circuit, etc., to take a series of measures, designed as a special power supply for medical treatment to meet the needs of users.
4,AC regulated voltage power supply
In recent years, the market demand is gradually growing, most of the requirements of the capacity is relatively large, this set of regulator and voltage regulator function as a product for the "regulator voltage regulator power supply" or adjustable regulator can be stable. Products have induction, power electronics and transformers and other types of regulators and voltage regulators, each type has its own characteristics and shortcomings, not described here. The use of multi-stage voltage regulator and column-type compensation AC voltage regulator composed of closed-loop column voltage regulator, regulator and keep the output voltage stable at the same time. This regulator regulator has developed rapidly in recent years, the capacity range of more 30kVA ~ 20 0kVA, it is compared with the induction type does not store the fixed turn and air gap, with no-load current and no-load loss is small, the waveform is not distorted (waveform distortion <0.5%), regulator speed, instantaneous overload capacity, has been widely used.
Load capacity continues to improve, high pressure and large capacity of various types of voltage regulator power supply needs have been put forward from time to time, some users put forward the column regulator 1000kVA ~ 3000kVA demand, social and user requirements is the driving force of technological development, the production unit for the user, the development of multi-functional, large-capacity regulator to meet the needs of the community regulator AC power is an unshirkable responsibility.
