KCZ6SM-1 digital thyristor open loop trigger control board

 

KCZ6SM-1 digital thyristor trigger control board is a fully digital thyristor open-loop trigger control board developed by our companys unique KC-198 ASIC chip. It has digital control , The output pulse has good symmetry. It can be used with or without a synchronous transformer. It has excellent performance such as self-phase function and can be used to replace the analog KCZ6.0 control board.

I. Main technical parameters and features

1. Direct 380V power supply, the board contains +15V, +5V, +24V power generation links required for its own work.

2. With phase loss, external faults (such as cooling water system faults), self-operating power supply undervoltage protection functions.

3. The board contains a pulse transformer, pulse isolation and shaping links, and the output can directly trigger six 5-1650A/100-3500V thyristors.

4. There is no potentiometer that needs to be adjusted in the board, no adjustment is needed in use, and the application is extremely convenient.

II. Normal working conditions

KCZ6SM-1 digital thyristor open-loop trigger control board can work normally under the following conditions.

1. The altitude does not exceed 1500m;

2. The operating environment temperature is -1045;

3. The relative humidity of the air is 90% (when the relative ambient temperature is 20);

4. There is no conductive, explosive dust, no corrosive and insulating gas around;

5. No severe vibration and shock.

Three, user instructions and wiring method

3.1 Notice to users

1. The KC-198 special control chip in the KCZ6SM-1 digital thyristor open-loop trigger control board is a programmable logic chip produced in the United States, and the intelligent software compiled by our company is written in it. Because the integrated circuit is a CMOS device, it is used Be careful to prevent breakdown and damage caused by static electricity, so you must not touch the pins of the KC-198 integrated circuit directly with your hands, and do not use a multimeter to measure the pins of the integrated circuit.

2. The KCZ6SM-1 digital thyristor open-loop trigger control board is an open-loop control board, and its working mechanism is negative logic, that is, when the phase shift control voltage increases, the conduction angle of the corresponding thyristor decreases, that is, the output voltage of the thyristor converter When the phase-shift control voltage decreases, the conduction angle of the corresponding thyristor increases, that is, the output voltage of the thyristor converter increases. This point should be paid special attention to.

3. The KCZ6SM-1 digital thyristor open-loop trigger control board adopts plane installation when installing, which adopts four-hole installation, and the installation aperture is 4-4.5. Figure 1 shows the layout of its components.

4. When KCZ6SM-1 digital thyristor open loop trigger control board is installed, the distance between its back and the conductive mounting plate should be greater than 20mm, and there should be space for unplugging the connector at the top, bottom and left of the mounting position. There should be no heat within 200mm below the board. Device.

5. The connecting wire area should be a soft wire of 0.5mm2 or more. The feedback protection signal, the given potentiometer and the pulse output wire should be twisted-pair wires, and no less than 810 twists per 100mm. From the output of the control board G1, K1 The leads between G6, K6 and the cathode of the triggered six-way thyristor gate should be as short as possible, and twisted pair or coaxial cable shielded wire should be used as much as possible.

6. The standard use of KCZ6SM-1 digital thyristor open-loop trigger control board does not require a synchronous transformer, and is directly used in a system with a working system line voltage 660V (the resistance selected by 380V at the factory), when the user system working voltage is higher than 660V or voltage When it is very low (less than 10V), it is recommended to use a synchronous transformer. The voltage of the secondary side of the synchronous transformer is 380V, which corresponds to G1 and K1. ; The synchronous voltage of the arm of G4 and K4 is connected to the TA in the N4 socket of the KCZ6SM-1 control board, and corresponds to G3, K3; the synchronous voltage of the arm of G6 and K6 is connected to the TB in the N3 socket of the KCZ6SM-1 control board, and Corresponding to G2, K2 ; The synchronous voltage of the arm of G5 and K5 is connected to the TC in the N2 socket of the KCZ6SM-1 control board. In this case, disconnect the points 1 and 3 marked A, B, and C on the board, and switch 1 Just short it with 2.

Figure 1 KCZ6SM-1 digital thyristor open-loop trigger control board component layout

3.2 Correct wiring

KCZ6SM-1 digital thyristor open-loop trigger control board leads to a total of 11 connectors. The external wiring method of each connector is as follows:

1. G1, K1; G2, K2; G3, K3; G4, K4; G5, K5; G6, K6 in the connectors N1, N2, N3, N4, N5, N6 are connected to the gate cathodes of the six-way thyristors that are triggered.

2. Pin 1 and pin 2 of the connector CN1 are connected to a 380V power supply.

3. Pin 1 (-15V), pin 2 (GND), and pin 3 (+15V) in the connector CN2 are two positive and negative power supplies for users. The power supply allows a load capacity of 20mA.

4. A given potentiometer is connected between pin 1 (P), pin 2 (Ug), pin 3 and pin 4 (GND) of connector CN3. Among them, pins 3 and 4 are reference grounds. 1 is the power supply +15V, and pin 2 is connected to the middle sliding end of the potentiometer.

5. The pin 1 (Wp) and pin 2 of the connector CN4 are connected to the contact of external fault protection (breaking when fault occurs), which is used for cooling system fault or other fault protection, and should be shorted when not in use. An external reset button is connected between pin 3 (RST) and pin 4 (GND), which is used to short-circuit these two points to reset when a fault occurs.

6. Pin 1 (NC), Pin 2 (Z), and Pin 3 (NO) in the connector CN5 are the three terminals of the integrated protection relay, among which pin 2 is the common terminal, and pin 1 and pin 2 There is a normally closed contact, and between pin 1 and pin 3 is a normally open contact, the contact capacity is 220V/1A or 380V/0.5A, any of the three pins is connected to the protection or alarm circuit , As the action contact for breaking the user's main circuit.

3.3 Parameter restrictions

The input and output load capacity of the KCZ6SM-1 digital thyristor open-loop control board is:

1. Input parameters:

(1) The power supply is 380V, and the maximum load current is 0.1A.

(2) The synchronous input voltage range of TA, TC, TB is 30V~380V/0.1A (can be achieved by adjusting the current-limiting resistance).

2. Output parameters

(1) CN2 corresponds to +15V, -15V power supply with a maximum load capacity of 20mA.

(2) The maximum load current of G1, K1~G6, K6 is 400mA, and the maximum no-load voltage amplitude is +12V.

(3) Six thyristors with thyristor capacity in the range of 51650A/1002500V can be triggered.

3.4 Application examples

Figure 2 shows the application schematic diagram of the KCZ6SM-1 control board in the three-phase thyristor controllable rectification system. Synchronous transformer is not used in this kind of use. The system uses water cooling, and the contact of the water pressure relay is connected between pin 2 and pin 4 of CN1.


Figure 2 The application principle diagram of KCZ6SM-1 control board in three-phase thyristor controllable rectification system