How to adjust the power of the intermediate frequency control board?

Look at what the control board is, first adjust the size and angle correctly, then fill the empty furnace, correct the voltage-limiting potentiometer on the board, set the intermediate frequency voltage, and then fill the charge, preferably a large piece of solid material, pull it up, see how much the current is, adjust the current-limiting potentiometer according to the required value, and set the DC current. If the impedances do not match, the electric and thermoelectric capacitors should also be adjusted. Hangzhou Investment Precision Casting Research Institute.

The potentiometer if rotated clockwise.

What do you want to adjust the power of your intermediate frequency furnace to a maximum of 500 watts? Then you can't adjust it to 1000 watts.

This angle is to adjust the inverter angle (also called the inverter lead angle). These two angles correspond to the potentiometers on the two control boards, which are the maximum inverter angle setting potentiometer (the adjustment range is generally 40 to 60 degrees) and the minimum inverter angle setting potentiometer (20 to 40 degrees).

Generally, it is small clockwise and large counterclockwise;

Generally, when debugging the electric furnace, the intermediate frequency voltage is set. The specific data is set according to the type of electric furnace.

Adjustment method:

The control board is installed on the cabinet, so that the inverter transformer is downward, and the functions of each potentiometer fixed according to this position are as follows: The potentiometer W4 is a phase-shifting embedded voltage regulating potentiometer, and adjusting this potentiometer can change the phase of the phase-shifting voltage, which should be satisfied: when the power regulating potentiometer is turned counterclockwise to the bottom, the main circuit of the rectifier should have no output, but the trigger pulse should have an output.

Users generally do not need to adjust. The potentiometer W7 at the far right end is the correction potentiometer of the frequency meter, and the frequency meter indication can be changed by rotating this potentiometer. The four potentiometers in the lower left are W1 voltage limiting, W8 overvoltage and W9 overcurrent, and W2 current limiting adjustment potentiometer from left to right, the potentiometer is a multi-turn precision potentiometer, clockwise rotation is the setting value decreases, and counterclockwise rotation increases the setting value.

1.Overcurrent 1 given value (Regulation: (1) When the halving switch S3 is disconnected, adjust the overcurrent protection potentiometer P6, and the given value should be 0 -12V

2) When the halving switch S3 is turned on, adjust the overcurrent protection potentiometer P6, and the given value should be 0 -6V(3) Initial setting value: Turn on S3 and adjust P6 to about -2V.

4) The adjustment method of the given value of overcurrent 2 (the same as above, the corresponding vernacular potentiometer is P2, and the halving switch is the given value of overvoltage (regulation: (1) When the halving switch S5 is disconnected, adjust the overvoltage protection potentiometer P9, and the given value should be 0 +12V(2) When the halving switch S5 is turned on, adjust the overvoltage protection potentiometer P9, and the given value should be 0 +6V

3) Initial setting value: turn on S5 and adjust the P9 of Shanghai Nanhui Cleaning Company to about +2V. 3.

The adjustment method of the given value of the current limiting ((1) when L16 (too large indicator) is on, the voltage value is not greater than that after unplugging U18, it changes with the adjustment of the current limiting potentiometer P5, and the amplitude should be 0 + 3) The initial setting value: unplug U18 and adjust P5 to about +4V.

4.The adjustment method of the given value of the voltage limiting of the control board of the intermediate frequency electric furnace changes with the adjustment of the voltage limiting potentiometer P10, and the amplitude should be 0 +12VThe initial setpoint can be adjusted to around +4V.

If you can't adjust the value you want, then increase the inverter angle, note that it is limited, not too large.

Adjustable IF voltage regulator to change IF voltage:

The working process of the regulator circuit can be divided into two situations:

One is when the DC voltage does not reach the maximum value.

At the time, because the feedback coefficient of the impedance regulator is slightly larger, the given of the impedance regulator is less than the feedback, and the impedance regulator works in the limiting state, corresponding to the minimum inverter angle, and the impedance regulator can be considered to be ineffective at this time, and the system is completely a standard voltage, current double closed-loop system.

Another situation is that the DC voltage reaches the maximum value, the current regulator begins to limit and no longer works, the output of the voltage regulator increases, but the feedback current does not change, for the impedance regulator, when the feedback current signal is slightly smaller than the given current, the impedance regulator will exit the limiting and start working, adjust the angle of the inverter angle regulator to give a given value, make the output of the intermediate frequency voltage increase, and the DC current also increases, and reaches a new balance.

Generally, the boards sold by our company are large and small chamfered corners have been adjusted on the machine, and in actual use, they generally do not move large chamfered corners, go to this blog to see, I hope it will help you.

Adjust the conduction angle and change the RMS voltage.

Duty cycle adjustment can look at your design.