The characteristics of constant current power supply
1) High operational reliability
Our constant current power supply in our factory does not have complex electronic circuits or connectors, allowing for continuous high voltage short circuits and sudden short circuits (equivalent to frequent spark discharge in the electric field), and will not burn any components. For the plastic electric field body that removes acid mist, constant current is also of great significance. When sparks break through, it is not easy to burn through the plastic anode cylinder wall.
2) Significant energy-saving effect
The power factor is high, with COS phi=0.9~1. Moreover, it does not change with the operating power level and can significantly reduce the capacity of the front-end power supply transformer. The volume and weight of a high-voltage generator are much smaller than those of a thyristor power supply. In some situations without explosion-proof requirements, the high-voltage generator can be directly installed on the top of the electric field body.
3) Having multiple protective measures
Equipped with overvoltage, continuous undervoltage, and overvoltage protection circuits, capable of automatic alarm and trip.
The development of constant current power sources has brought new characteristics to electrostatic deposition technology, achieving unexpected results in practical applications in industries such as chemical, metallurgical, building materials, textile, and power generation, and significantly improving operational efficiency. Through over 2000 sets of industrial applications, we have gained experience in various fields and achieved significant social and environmental benefits.
Accurate constant current power supply circuit diagram
Accurate constant current power supply is very practical for the design of LED energy-saving lights. Let's analyze the design ideas of accurate constant current power supply for everyone. In the circuit shown in Figure 1, a grounding circuit is added between the constant current circuit and the load, so that the current quickly recovers and stabilizes when the load changes. A1 and VT1 form a voltage/current conversion circuit, which can convert the ground level signal into the+15V level required by the subsequent constant current circuit. A2, VT2, VT3, and other components form a standard constant current circuit, with R1=R2 and providing equal current I1=I2. The base of VT5 is provided with a stable voltage of+5V by the voltage regulator diode VS1, so the emitter voltage of VT5 is not affected by load changes and remains at+5.7V. In addition, due to the low input impedance of the emitter in the common base circuit, the constant current source composed of A2 and VT2 is not affected by load changes and is in an ideal working state.
