Zibo Linzi Yinhe High-Tech Development Co., Ltd. is located in Linzi District, Zibo City, the birthplace of world football and the ancient capital of Qi State. It was established in February 1993. ), a high-tech enterprise integrating research, design, production and sales of power electronic devices, with a number of domestic leading technologies and independent intellectual property rights. The company occupies an area of 20,000 square meters, has a registered capital of 21.8 million yuan, 125 employees (including more than 30% of technicians), advanced technology and equipment, and has strong technical research and development capabilities and large-scale production capabilities.
The company has rich experience in management and operation, strong technical strength, advanced production technology, sophisticated production equipment, complete testing methods, reliable product quality, and thoughtful after-sales service
We focus on high-power power electronic capacitors and induction furnace capacitors, and our products have been recognized by customers in multiple fields
1. What are the dimensions and weight of the existing modules? According to the current module packaging form, it is divided into 6 kinds of shapes. The specific specifications, dimensions and weight are as follows: Name serial number Module appearance size (length×width×height) Module weightkg Remarks 1 92×52×39 0.31 55type 2 92×60×39 0.38 100type 3 116×72×39 0.55 200type 4 145×105×60 1.2 320type 5 185×135×67 2.65 500type 6 300×230×102 9.6 1000type 7 400×300×110 20 2000type 2. The constituent materials in the module The component materials of the module: Thyristor, DCB (Ceramic Copper Clad Laminate), phase shift trigger control circuit, (protection circuit, feedback circuit, current, voltage sensor, single-chip microcomputer and above are included in the functional module) heat dissipation base plate, input and output electrodes, control signal Port and other components. 3, the chip used inside the module uses imported glass passivation square chip, produced in Germany. The chip withstand voltage of the module is 1200-2200V 4. Introduction to the internal insulation of the modules The isolation method in the module is: the thyristor and the heat dissipation base plate are separated by a DCB ceramic copper clad plate, the dielectric strength VISO≥2500VAC, the trigger circuit and the thyristor main circuit are electromagnetically isolated. The dielectric strength between them is ≥2000V. It is protected by elastic silicone gel and sealed with epoxy resin. 5, the circuit form of the module According to the needs of the load, the main circuit design of the thyristor mainly includes four circuit forms: three-phase rectification, three-phase AC, single-phase rectification, and single-phase AC. 6. What is the temperature coefficient of the output voltage of the module? The temperature coefficient is 600PPM/℃. 7. What is the rate of increase of the current (di/dt) and voltage (dv/dt) of the module? Current rise rate: 100A/μS 500V/μS 8. Whether there is protection function in the module Ordinary thyristor modules generally do not have protection inside. Functional products such as constant current and constant voltage control modules, intelligent motor control modules, and dual closed-loop DC speed control modules have overcurrent, phase loss, and overheat protection functions, according to customer needs. Type modules can also be customized with various protection functions. 9. The control signal of the module ±l2V regulated power supply requirements voltage range +12V ±0.5V, ripple voltage is less than 30mv; -12V±0.5V, ripple voltage is less than 30mv; for ±12V power supply accuracy is required ±0.5V; ripple voltage ≤10mv current capability The current of the ±12V power supply must be more than 2 times the actual working current. If a transformer rectified regulated power supply is used, the filter capacitor must be greater than 1000μF/25V. 10. Will harmonics be generated when the module is working? How much is the impact? The harmonics generated by the module during operation are the same as the traditional thyristor circuit, which will have an impact on the grid, but it is not serious. It is not a superposition of harmonics and does not affect the normal operation of other equipment. 11. What is the relationship between module input voltage and output voltage? AC module Vout=0~1.0Vin, three-phase rectifier module Vout=0~1.35Vin. Single-phase rectifier module Vout=0~0.9Vin. 12. Is the module an open-loop control system or a closed-loop control system? The thyristor smart module (such as full-control rectification, AC, etc.) is an open-loop control system; functional products with functional modules (such as constant current and constant voltage control modules, intelligent motor control modules, dual closed-loop DC speed control modules, etc.) are a Closed loop control system. 13. What is the difference between the use of an open-loop module and a closed-loop module? What is the difference in control? The open-loop module changes with the load and the power grid, and the closed-loop module does not change with the change within a certain load and power grid range (power grid ±20%, load change 60%). Open-loop module control power supply uses +12V, and closed-loop module control power supply uses ±12V. 14, the thyristor trigger pulse form in the module The thyristor trigger uses a wide pulse trigger, and the trigger pulse width is about 4ms (milliseconds). 15. Is the main circuit of the thyristor module fully controlled or half controlled? Is the trigger circuit fully controlled or half controlled? What is the difference between the trigger voltage of full control and half control? What is the difference in waveform? The main circuit of the thyristor is a fully-controlled bridge, and the trigger circuit is divided into half-controlled and fully-controlled. The half-control trigger voltage is 0~10V, and the full-control trigger voltage is all on after 7V. The half-control module waveform diagram has only three thyristor waveforms in one cycle, and the full-control module waveform diagram has six thyristor waveforms in one cycle. 16. What is the isolation method between the main circuit of the module and the trigger circuit? What is the isolation voltage? There are two isolation methods. The solid state relay adopts photoelectric isolation, and the other modules adopt electromagnetic isolation, and the isolation voltage is 2500VAC. 17. Why do modules need to add heat sinks? How many ways are there to dissipate heat? When the thyristor module is working, due to its own pressure drop, it will generate a lot of heat. If it is not dissipated in time, it will affect the operation of the module. The heat dissipation methods are: water cooling, forced air cooling, natural cooling, and forced air cooling is generally recommended. 18. What is the principle of module selection? What are the requirements for ambient temperature? Selection of module current specifications: Resistive load: The nominal current of the module should be 2 times of the rated current of the load. Inductive negative OR: The nominal current of the module should be 3 times the rated current of the load. Environmental requirements: The environmental adaptation temperature is -25℃～+45℃. The workplace must be dry, ventilated, dust-free, and non-corrosive. 19. What are the internal protections of these types of modules? In what way are they implemented? Constant current and constant voltage control module, double closed-loop DC speed control module, intelligent motor control module have overcurrent, overheating and phase loss protection inside. Other modules are not protected, you can customize the protection module, the general production cycle is 7-10 days. The current and voltage sensor detects whether the working current and voltage of the module exceed the specified value, and automatically cuts off the control signal when it exceeds the specified value. 20. Does the module need to add a freewheeling diode? The module does not need to add a freewheeling diode, because the main circuit of the module is a fully controlled main circuit, and it will not lose control when the inductor is discharged. (Semi-controlled customized modules must add diodes) 21. Can the AC module be used for speed regulation? What is the effect of soft start? Can overcurrent protection protect the motor? The AC module cannot be used for AC speed regulation. It can be used for soft start to reduce the starting current, reduce the impact on the power grid, and avoid other equipment malfunctions during startup, and the effect is better. 22. What are the precautions for the application of DC speed control module? When using the DC speed control module, a matching tachogenerator, a suitable excitation power supply, whether the armature voltage is 220V or 440V, and a smoothing reactor above 4KW are required. 23. What is the difference between an AC module and a voltage regulator? Voltage regulator is equal power transmission, isolated from the grid. The module is not isolated from the grid, and the transmission power is controlled by the module current. 24. Can the AC module be used for constant torque load? Is the control torque motor appropriate? The AC module cannot be directly used for constant torque loads. The torque motor is a high rotor resistance motor, and the speed regulation effect of the module is better. 25. Is there any interference in the power feedback? Using the rectifier module for electric energy feedback, the user asks: Will there be grid interference? The answer is basically no interference. Because the thyristor rectifier circuit is used to feed electrical energy back to the grid, it takes advantage of some of the characteristics of the rectifier circuit. Without changing any parameters of the original grid, external energy sources are added to the grid along the sinusoidal current of the grid. It is not a high-frequency inverter process. It uses high-frequency oscillation to add an external power source to the grid with high-speed pulse current.
Constant current and constant voltage control module (1) Frequently asked questions about the first use of the module A simple function test can be performed before the module is used. It can test the constant current function and the constant voltage function, but it is more convenient to choose the constant voltage function test. The following points are common problems when using for the first time, which may be instructive for you. ①When adjusting the given signal, the module has no current or voltage output, but the given signal and the external ±12V power supply are normal. Handle: You need to reset the module. ②In constant voltage applications, the output voltage measured with a voltmeter is not accurate or continuous. Reason: Your load is too small, change a load greater than 100w. ③In constant current application, if the given signal is small, the module will output full voltage. Treatment: You need to work at a higher current, such as 20A. ④The constant current accuracy or constant voltage accuracy of the module cannot reach the specified index. Reason: The power supply index cannot meet the requirements or the given signal is unstable. ⑤Can the constant current and constant voltage functions be used at the same time? Answer: No, it can only work alone in a constant current or constant voltage mode, or switch in order. ⑥Can the module reach the maximum nominal current value under any output voltage? Answer: No, the nominal current of the module is the maximum output current at full voltage output. The specific output current also depends on the output voltage and stability accuracy. ⑦How to choose the best working interval of the module? Answer: Module application is best when the nominal value is 20%-60%; when it is less than 20% or greater than 70%, the effect is poor. ⑧How to discharge the battery when charging the battery? Method 1: Adjust the positive and negative output polarity of the module to be opposite to that during charging. Method 2: Connect the positive pole of the module to an inductor. The polarity of the module is the same as that during charging. First adjust the module voltage to be higher than the battery pack, then slowly reduce the module output voltage to the battery discharge voltage value, and use the inverter method to complete the battery discharge . This method is suitable for professional users. ⑨The index drops when the module is used for inductive load. Reason: The voltage and current sensor processing circuit of the module may process the induced signal voltage differently from the ordinary instrument. The thyristor will produce reverse spikes during commutation, and the module processing circuit will suppress the spikes; while ordinary instruments will handle the spikes as usual, so it is a normal phenomenon, not a drop in indicators. ⑩How to find the radiator temperature test point? Method: The test point should be close to the center of the module and close to the surface of the radiator of the module housing. (2) Current selection rule ①Selection of module current The nominal current of the module is the maximum current allowed to flow through the module during normal operation. Considering the poor resistance to current impact of the thyristor, it is recommended that you leave a margin when selecting the module. Resistive load: The nominal current of the module should be 2 times of the rated current of the load. Inductive load: The nominal current of the module should be 3 times the rated current of the load: ② Conduction angle requirements: In the non-sine wave state, the current value measured by an ordinary instrument is not an effective value. The smaller current value displayed by the instrument may exceed the rated value of the module by several times. Therefore, the module is required to work at a larger conduction angle as much as possible ( Above 100 degrees). The module outputs a larger current under a smaller conduction angle (that is, the module's high input voltage, low output voltage), which will cause the module to heat up and burn.
1 Introduction In modern industrial production, thyristors have been widely used due to their mature technology, large current and high voltage. In the automatic control system composed of thyristors, many of them are constant current and voltage closed-loop control constant voltage applications. However, most of the current constant current and constant voltage thyristor devices and products are restricted by sensors and control circuits, and are bulky, complicated in circuits, difficult to debug, and low in control accuracy. And because of the use of shunt and voltage divider for sampling, there is no isolation measure, the electromagnetic interference of the control circuit is large, and it is difficult to interface with the computer. The application of thyristor constant current and constant voltage equipment is in a more difficult state. The constant current and constant voltage equipment using thyristors has a large application space due to its wide range of constant voltage (0 to several hundred volts) and constant current (0 to several hundred amperes). The constant current and constant voltage intelligent module produced by our company solves the contradiction between this application and manufacturing. Compared with the traditional constant current and constant voltage equipment, the constant current and constant voltage intelligent module adopts linear Hall sensor, high-precision control circuit and modular production technology. The characteristics of small size and convenient use will surely obtain a large number of applications. 2. Working principle (1) Main working circuit The main circuit of the constant current and constant voltage intelligent module (rectifier) is shown in Figure 1. It is a three-phase fully controlled rectifier bridge composed of six thyristors, and a DC voltage of 0-50V can be obtained by changing the conduction angle of the control circuit. figure 1 figure 2 The working principle diagram of the control system is shown in Figure 2 (1) Adoption of Hall sensor Hall effect sensor is a new type of current and voltage sampling device. Its working principle is to use the Hall effect of Hall element to induce voltage in a magnetic field to convert current and voltage into voltage signals. The advantages of the Hall sensor are high conversion coefficient, electrical isolation, fast response speed, and good linearity, which have great benefits for improving the performance of the whole machine. 2. Control system characteristics (1) The linear Hall sensor is used to achieve electrical isolation, improve the performance of the whole machine, make the set voltage (0-10V) have a good linear relationship with the output voltage and current, and overcome the phase shift angle and output voltage of the thyristor The disadvantage of non-linearity. (2) Voltage feedback and current feedback adopt two independent circuits, which do not affect each other, and can realize automatic conversion through external level. (3) Multiple protection functions make it safer and more convenient to use. (4) The digital phase shift control circuit is used to make the trigger more accurate and reliable. 3. The main technical parameters and functions of the constant current and constant voltage smart module Due to the use of high-precision Hall sensors and precision amplifying circuits, modular products shorten the signal transmission distance between the control circuit and the phase shift circuit, the main circuit, and have the characteristics of low interference, so that the constant current and constant voltage module has higher control accuracy , It has greater advantages than other products with the same function. (1) Higher control accuracy is within the range of good linearity on the thyristor control curve (constant voltage is 100V-350V, constant current is about 35%-75%I (maximum set current)), and the voltage regulation accuracy is 0.5 %, the accuracy of steady current is within 1%, in the range of poor linearity, the accuracy of voltage stabilization is not more than 1%, and the accuracy of steady current is not more than 2%. (2) Grid adjustment rate: Grid change ±20%, output change (within the adjustment range) is not more than ±1%. (3) High linear correspondence, 0-10V setting has a good linear relationship with output current (voltage), and the nonlinearity is not more than 5%. In addition to the constant current and constant voltage function, the module also has the following functions: Multiple protection functions, three protection functions of overcurrent, overheating, and lack of phase protection make the module application safer. Sampling signal output, Hall sensor sampling signal output, external current and voltage display can be connected. Prohibit the constant current and constant voltage function. If you are not satisfied with the internal constant current and constant voltage effect, you can connect an external control circuit and directly use the sensor sampling signal. 4. Applications of constant current and constant voltage modules The constant current and constant voltage intelligent module is characterized by its high control circuit precision, good balance, wide working voltage range, good current impact resistance, simple installation and use, high reliability, small size, maintenance-free, and is conducive to miniaturization of power supplies. It can be widely used in various occasions such as motor, generator excitation, DC screen (battery charging), laser power supply, magnetizing equipment, UPS power supply and so on. It is more widely used in the application of "suspension superimposed" linear power supply, which is widely used in modern foreign countries. Can reflect the characteristics of the module. (1) Basic application principle diagram (Figure 3) image 3 image 4 image 5 (2) Application principle diagram of AC constant current and constant voltage in electroplating and electrolysis (Figure 4) (3) Application in floating superimposed linear power supply (Figure 5) This device is used for high-precision high-power linear regulated power supplies, which greatly reduces the power consumption of the GTR, greatly improves the efficiency and reliability, and can use a smaller power GTR to reduce the cost. The use of constant current and constant voltage modules not only improves accuracy, but also greatly reduces the size of the power supply.
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