1. Fully dynamic current limiting, voltage limiting circuit - different from other manufacturers, the cutoff value of other manufacturers is a fixed value, only when the device power reaches the set value. The current limiting and voltage limiting circuits of our company belong to full dynamic tracking, which is determined by the given state of the power regulating potentiometer. That is to say, the current limiting voltage limiting is started when the equipment is put into operation, and has constant current at any stage of equipment operation. Or constant pressure function. 2. Over-current over-voltage over-speed dual-thread protection - more characteristic than other lines: after over-voltage, over-current action, the signal is divided into two ways: one way through the integrated regulator, control the given voltage of the rectification trigger circuit, thus making the rectification The bridge enters the protection zone; the other directly controls the forbidden end of the voltage controlled oscillator, so that the rectified phase shift pulse directly returns to 150O , avoiding other links affecting the protection speed. This unconventional treatment greatly enhances the reliability of protection. 3. Constant current start -- In the zero-voltage starting line, whether the inverter silicon can be reliably commutated has a great relationship with the current supplied by the rectified power supply. If the inverter is too large, the inverter silicon can be directly connected. If the inverter is too small, the inverter silicon cannot be maintained. Normally open, neither result will make the inverter reliable. Especially for the zero-pressure sweep start. Therefore, our company introduces a constant current start at the start, and at the initial stage of startup, the current is constant at the commutation point of the inverter silicon, so that the probability of the resonant signal of the frequency sweep circuit is increased. In addition, another function of constant current starting is that when the inverter circuit is faulty, the inverter cannot be established, and the circuit limits the current to a minimum safe value to avoid the impact of large current on the component. In addition, when the operator fails the operation, the start switch is turned on first, and the power potentiometer has been placed at the full voltage position. For this misoperation, the old constant power board is powerless, and the constant current starting function of the YT-J5 is skillfully solved. This problem, in the case that the inverter is not established, by controlling the rectification phase shift, the DC voltage is limited to about 100V , and the resulting current impact is much smaller than the full power.       

       

       

4. Start current pre-detection - start current is also called start over current. YT-J5 specially sets a current detection line at the beginning of start-up. When the intermediate frequency voltage signal is not established, the starting over-current threshold is generally set to rated current. After 1 / 4 , once the current is found to exceed the value, the circuit immediately sends a protection signal, and the rectification phase shifts back to the zero position and restarts again. Introducing current detection at the beginning of startup is conducive to repeated starting, and can also avoid damage to equipment components due to operational errors. 5. Constant current start, repeated start, sweep start - etc. Our original technology eliminates the difficulty of starting parallel resonant circuit. , so that the device startup success rate really reaches 100 %. 6. Phase loss protection - When the phase is missing, the equipment works in a very abnormal state, so it is necessary to introduce phase loss protection. 7. Inverter pulse symmetry adjustment - the difference between the parameters of the inverter bridge component and the hysteresis difference of the control loop will cause the DC output of the inverter output. The presence of this DC component does not boost the pure parallel inverter. In the circuit, only the inverter efficiency is reduced. In the capacitor-boosting circuit with parallel resonance, the hazard is particularly prominent: not only will the inverter efficiency be reduced, but also the DC voltage will be generated on the resonant capacitor. The component is normally turned off, and the DC component is also superimposed with the intermediate frequency voltage to cause the thyristor to generate an overvoltage (this is the root cause of the thyristor and compensation capacitors in the past.) The unique new function of the inverter pulse symmetry adjustment completely solves the problem of the variable frequency component of the booster circuit and the leakage reactance, and improves the frequency conversion efficiency of the inverter circuit. 8. tf automatic conversion ( constant power function ) - This can realize automatic adjustment of power factor and automatic tracking of impedance change, so that the electrical efficiency of the equipment is greatly improved, power consumption loss is reduced, and the smelting cycle is shortened. On the other hand, the adaptability of the equipment to the power grid is greatly improved; in operation, the operator requirements are reduced, and it is not necessary to manually adjust the lead angle potentiometer. 9. Buffer start -- This can realize the operation of the power potentiometer at any position, such as closing, starting, resetting, etc., which is considered dangerous by other manufacturers, and avoids damage to components due to worker error. Reduce the impact of equipment on the grid, so that the reliability and stability of the equipment is greatly improved. 10. Intelligent “RE” port – with buffer start, constant current start, repeated start, sweep start, etc., it can be remotely operated by reset port, such as start-up, shutdown, and lifting power, and can be automatically controlled with other detection devices. (eg heat preservation, constant temperature). 11. 8- band center frequency adjustment: In the past, the old constant power board needed to replace the resonant capacitor of the inverter voltage-controlled oscillator for loads of different frequency ranges, which caused great inconvenience to the modification and production equipment. We have added a band switch here, which can be adapted to different frequency loads without adjusting the component parameters. It is difficult to adjust the working frequency of the constant power board.       

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