Single Channel Voltage Regulator Contact Life Extension
Single Channel Voltage Regulator parameter tuning is to improve the dynamic and static characteristics of the closed-loop system, therefore, must be aware of the parameters of the control system before the dynamic and static characteristics of the system. Because the system is composed of two parts of the object and the control device, so should be in-depth understanding of the characteristics of the object and detection, the characteristics of the Single Channel Voltage Regulator. If you can test the characteristics of the controlled object is the best, if you do not have the test conditions, it should also be a rough estimate, such as the capacity, load changes, the length of time lag, the object with or without self-balancing ability In addition, you should also understand the process, control indicators, the operation process. For the use of field instruments will have to be carefully adjusted, check, make it meet the technical requirements. Only in the control of the object and the instrument used a comprehensive understanding, in order to correctly adjust the Single Channel Voltage Regulator parameters.
But also to see that the tuning Single Channel Voltage Regulator parameters can only be improved within a certain range of control system quality. If the system design is unreasonable, instrument calibration, improper use, the control valve can not meet the requirements, these problems to adjust the Single Channel Voltage Regulator parameters to improve, is clearly impossible. Such as a factory of the oxidation furnace pressure control system, set the choice of many groups of tuning parameters, and even adjust the proportion of 250%, the system still can not be stable, observed by looking for reasons, found that the valve selection problems, replace the valve , After setting the system on the normal. Tuning the Single Channel Voltage Regulator parameters is an important factor in improving the quality of control, but not the only factor. So in the event of tuning parameters can not meet the control quality requirements, or put into operation automatically very difficult. The best to calm down, carefully analyze the characteristics of the object, the composition of the system, the use of the instrument, etc., to find the problem and find out the reasons, if the system design is unreasonable, the original design of the system should be modified.
The basic principle of voltage Single Channel Voltage Regulator regulation
When the generator speed changes, to keep the voltage constant, only the corresponding magnetic pole to change the magnetic flux, that is, when n increases the sound to keep the voltage to maintain a certain. The size of the magnetic flux depends on the magnetic field current, so the speed changes as long as the automatic adjustment of the magnetic field current can keep the voltage to a certain. The voltage Single Channel Voltage Regulator is based on this principle for voltage regulation.
The voltage Single Channel Voltage Regulator is a single-stage contact type voltage Single Channel Voltage Regulator with an arc-extinguishing system that effectively overcomes the shortcomings of ordinary single-stage contact-type voltage Single Channel Voltage Regulator contacts that are prone to rapid ablation of the spark and is suitable for any 12V, 300W ~ 500W within the grid alternator.
The voltage Single Channel Voltage Regulator adds a VD & mdash; L, C contact arcing system consisting of a diode VD, a choke coil L2 and a capacitor C, based on a conventional single-stage contact voltage Single Channel Voltage Regulator. The principle of its arc can be illustrated.
When the generator voltage reaches the specified value, the magnetizing coil L1 opens the contact, so that the adjustment resistor R2 and the acceleration resistor R1 are stepped into the magnetic field circuit so that the magnetic field current drastically decreases, resulting in a high self-inductance electromotive force in the field winding , The induced current through the diode VD, choke coil L: constitute a loop, play a role in the continued flow to protect the contacts. In addition, at both ends of the contact through the L2 parallel to a capacitor, used to absorb the self-inductance electromotive force also reduces the contact spark.
The advantages of the single-stage contact type voltage Single Channel Voltage Regulator with an arc-extinguishing system are that only a pair of contacts are easy to adjust; not only the T-contact sparks are reduced, the contact life is prolonged and the radio interference is reduced; When the contact is opened, the self-induced current passes through the demagnetization of L2, thus accelerating the closure of the contacts and increasing the vibration frequency of the contacts.