Three-phase AC voltage stabilizers are used in many fields, including lighting and computers can often see three-phase AC voltage stabilizers play a very important role. Friends who are interested in acquiring the operation should start from the basic plate knowledge to learn and analyze, and about the principle of three-phase AC voltage regulator is also very valuable, after all, only to have an all-round understanding of the product, to be able to avoid additional losses or trouble in the later practice, to harvest the expected ideal advantage.
A, three-phase AC voltage regulator
Three-phase AC voltage regulator, this product is widely used in: voltage testing instruments, lighting equipment, computers, X-ray equipment, photographic technology equipment, communication systems, industrial robots, production line control devices, security alarm systems, medical equipment, laboratory instruments, numerical control machine tools, motors. air conditioners, chillers, TV equipment, sound systems and photocopiers.
Scope of application:
This product is widely used in: voltage test instruments, lighting equipment, computers, X-ray equipment, photographic equipment, communication systems, industrial robots, production line control devices, security alarm systems, medical equipment, laboratory equipment, CNC machine tools, motors, air conditioners, air conditioning, television equipment, sound systems and copy machines.
Two, three-phase AC voltage regulator principle
Working frequency AC power supply through the transformer step-down, rectification, filtering into a stable DC power. The rest of the figure is a voltage regulator to realize the role of the control part of the voltage regulator. Power supply connected to the load, through the sampling circuit to obtain the output voltage, the output voltage and the reference voltage for comparison. If the output voltage is less than the reference voltage, the error value will be amplified by the amplifier circuit is sent to the input of the regulator, through the regulator to increase the output voltage until the reference value and the same; if the output voltage is greater than the reference voltage, the regulator to make the output decrease.
Voltage regulator circuit by = l2V power supply circuit, voltage detection control circuit, overvoltage protection, as shown in Figure 5-51 l2V power supply circuit by the regulator transformer T W4, W5 windings and rectifier diodes VDl-VD4, filtering capacitors Cl, C2 composition. The voltage detection control circuit consists of resistors R-R7, potentiometers RPl, Rm, voltage regulator diode VS, capacitors C3, C4 and operational amplifier integrated circuit IC (Nl-N3). The overvoltage protection circuit consists of N3 inside the IC, transistor V3, resistor Rl2 and relay K. The automatic voltage regulation circuit consists of resistors R8-Rll, transistors Vl, V2, DC motor M, sliding contacts and Wl-W3 windings of T. After connecting the big end of the AC voltage regulator's transmission to the utility, an induced voltage is generated on the W4 and W5 windings of T. This voltage is rectified by VDl-VD4 and filtered by Cl and C2 to provide IC and Vl, V2, etc. with an unstable operating voltage of l2V. The +l2V voltage has other functions. After Rl-R3 voltage divider, VS voltage regulator, respectively, for the Nl-N3 inverted input to provide reference voltage; over-voltage protection circuit Shen K and V3 to provide working power; by R4, RP2, R6 voltage divider, for the Nl and N2 positive-phase input to provide a detection voltage; by R7, RPl, R5 voltage divider, for the positive-phase input to provide a detection voltage for the N3.
Nl-N3 compare the detection voltage at the positive-phase input with the reference voltage at the inverted-phase input, and use the resulting error voltage to control the automatic voltage regulation circuit.
The knowledge popularized above includes the basic board information of the three-phase AC voltage regulator as well as more professional and detailed content answers from the perspective of the working principle of the product. We can learn that three-phase AC voltage stabilizers can be used in many areas and play an important role, the key is related to its principle, although this knowledge is very complex, for inexperienced friends is difficult to understand, but as long as you master, then it is still helpful in the later application.