Instructions for KY3-B6 SCR Rectifier Controller
I. overview
KY3-B6 thyristor rectifier controller is the most advanced special thyristor phase shift trigger integrated circuit introduced from abroad. The output trigger pulse has extremely high symmetry and stability, does not change with the ambient temperature, and has no phase sequence requirements. It has complete fault protection functions such as current limiting, over-current and over-heat. It has the advantages of high accuracy, perfect function, simple and reliable use, easy debugging and strong anti-interference. It can be widely used in voltage and current regulation in various fields of industry. It is suitable for resistive load, inductance load, primary side of transformer and various rectifier devices. It is mainly used in high power supply, AC and DC voltage regulation of high frequency equipment, salt bath furnace, power frequency induction furnace, quenching furnace, temperature heating control of molten glass and various industrial furnaces; rectifier transformer, dispatcher, primary side of electric furnace transformer, magnetization and demagnetization regulation, DC motor speed regulation, motor soft start energy saving device; with nickel, ferrochromium, far infrared heating elements and silicon-molybdenum rods. Temperature control of heating elements such as silicon carbon rods, etc.
Ⅱ. Performance characteristics
○ It can be used for power supply of 220 V and 380V, 660V power supply frequency 50/60Hz power grid.
○ It can directly interface with the output signals of various control instruments (temperature controllers) and microcomputers at home and abroad.
○ It is suitable for resistive load, inductive load, primary side of transformer and other load types.
○ It has soft start and soft stop function, reduces the impact interference to the power grid, and makes the main circuit more safe and reliable.
○ Driving power is strong, each circuit can output 800 mA of current, can drive 4000A thyristor.
○ It has the functions of phase-absence, over-current and current-limiting protection.
○ Urgent stop function.
○ Temperature control and protection function.
○ There are three control modes: open-loop, constant current and constant voltage, which can be used in different occasions.
○ Integration structure: power supply, synchronous transformer, trigger control circuit and pulse transformer are integrated. Structural tightness, easy debugging, simple wiring.
○ Protective installation with aluminium shell, safe and dustproof.
Ⅲ. Main Technical Indicators and Their Use
Input signal: 4-20mA (short connection S1 is selected by P1 jumper) DC 0-5V (short connection S2 is selected by P1 jumper) DC 0-10V (short connection S3 is selected by P1 jumper) 10K potentiometer (manual adjustment)
Output Specification: Three-phase or three-phase two-way trigger 0-100% output.
Phase shift range: 0-180.
Trigger capacity: <4000A thyristor.
Indicative function:
PW_Power Supply Indicator
GL_Overcurrent Fault Indication
Power usage: AC1 and AC2 are connected to 220VAC main power supply (if users need 380V access, they need to customize it separately).
Load test: SCR can not work properly without load or current less than 0.5A when testing trigger. So the load current should be greater than 0.5A.
IV. Working methods
1. Closed-loop or constant current and constant voltage operation modes:
○ The trigger board chooses closed-loop or constant current and constant voltage mode through K1 dialing switch. When debugging trigger board, it is better for users to choose the closed-loop general voltage regulation mode to debug. (That is K1, please dial to the closed-loop position for general voltage regulation mode control)
○ The trigger board can also be connected to the feedback signal of 10V DC voltage and 5V DC shunt for constant, current limiting and constant voltage control of DC load.
○ The trigger board can be sampled according to different requirements. The trigger board can also form an external closed-loop automatic control system with a single chip computer and corresponding detection sensors.
2. Three input modes can be selected:
○ 4-20mA input. Short connection S1 is selected through JP1 jumper.
○ 0-5V input. Choose short connection S2 through JP1 jumper.
○ 0-10V input. Select short connection S3 through JP1 jumper.
3. External temperature-controlled protection switch and reset switch can be connected: (refer to wiring diagram).
4. Current limiting protection:
The trigger board sets the threshold value of current limit by adjusting the current-limiting adjustable resistance, and adjusts it clockwise to a low value.
5. Overcurrent protection:
The trigger board sets the threshold value of overcurrent by adjusting the overcurrent adjustable resistance, and adjusts it clockwise to a low value.
V. Exclusion of Abnormal StateA
1. When the input control signal is small, the SCR is close to 100% output.
○ It is possible that the flip-flop does not receive feedback signal under the condition of constant current or constant voltage operation mode, which leads to the incorrect judgment of the integral system of the flip-flop. Please connect the corresponding feedback signal.
○ When the flip-flop operates in constant current mode, the load current is too small.
○ Check whether the feedback signal is connected correctly.
2. SCR has no output, no current or voltage:
○ The panel power indicator is not on and SCR cannot work. Please check whether the power of the trigger is connected correctly.
○ Check whether the overcurrent indicator is on or not. If the overcurrent protection status is proved by the light, please check and reset after power off or short reset switch.
3. Trigger users can not solve the problem, please do not hesitate to contact us, we will solve it for you in time.