High Voltage Generator

Description: This high voltage generator is capable of producing a stable high voltage exceeding 8kV. The circuit design is straightforward, ensuring stability and reliability. It consists of a step-down rectifier, a voltage regulator circuit, an 18kHz multivibrator-type oscillator, and a booster transformer, among other components. The step-down rectifier is composed of a step-down transformer (T1), a full bridge rectifier, and a filter capacitor (C1). The rectified 15V DC voltage is processed through a three-terminal regulator (7812) to yield a regulated output of +12V stable DC voltage, which supplies power to IC2 and VT1. The astable multivibrator is constructed using a 555 timer alongside resistors R1, R2 and capacitor C3, with an oscillation frequency calculated as fc = 1.44 / ((R1 + 2R2) * C3). The parameters are designed to achieve an oscillation frequency of approximately 18.5kHz. The AC high voltage generator operates directly from a 220V AC input and is characterized by its compact size, high efficiency, extended operational duration, and substantial output current. Type A can operate continuously for over five minutes, while Type B is designed for prolonged use. The component selection includes diodes VD1 to VD4 (1N4007), capacitor C1 (10 µF/400V), capacitor C2 (non-polar 0.47 µF/450V), resistor R1 (10k/5W), resistor R2 (1/8W 10K), resistor R3 (1/8W 1.6MΩ to 1.8MΩ), thyristor VS (3A/400V), high voltage capacitors C3 to C5 (100pF/14kV), and capacitor C6 (1000pF/40kV with an engineering plastic shell). The multifunctional high-voltage electrostatic generator is based on the 555 timer and, when paired with a high-voltage diode and discharge brush pin, can serve various applications including negative oxygen ion generation, ignition, static vacuum cleaning, and high-security systems. The 555 timer, in conjunction with resistors R1, R2, and capacitor C2, forms a non-steady state multivibrator with an oscillation frequency of approximately 20kHz. After amplification through transformer T1, the secondary output reaches 10kV at 20kHz, which is subsequently rectified by diode D1 to yield 7kV, with a load current capacity of up to 50µA.

The circuit architecture of this high voltage generator is designed to ensure efficient operation and reliability across various applications. The use of a step-down transformer allows for the conversion of high voltage AC input into a lower DC voltage, which is essential for the stable operation of the following voltage regulation stage. The full bridge rectifier efficiently converts the AC voltage into DC, while the filter capacitor smooths out any ripples, providing a clean voltage supply for the regulator.

The 7812 voltage regulator is key in maintaining a consistent output voltage of +12V, which powers critical components of the circuit. The astable multivibrator, based on the 555 timer, generates a square wave signal that is vital for the operation of the booster transformer. The oscillation frequency is carefully calculated to optimize the performance of the transformer, ensuring that the high voltage output is both stable and reliable.

The choice of components is critical to the performance of the generator. The use of high voltage capacitors rated for 14kV and 40kV ensures that the circuit can handle the high voltages generated without risk of failure. Additionally, the selection of resistors with appropriate power ratings is crucial to prevent overheating during operation.

The versatility of the generator is highlighted by its potential applications. With modifications, it can serve as a negative ion generator, enhancing air quality, or be utilized in ignition systems for various devices. The design's adaptability to different applications makes it a valuable tool in both industrial and experimental settings.

Overall, this high voltage generator embodies a well-thought-out design that combines efficiency, reliability, and versatility, making it suitable for a wide range of high voltage applications.This high voltage generator can generate stable high voltage above 8kV. Its circuit is simple. It is stable and reliable. This circuit includes step-down rectifier, voltage regulator circuit, 18kHz multivibrator type oscillator and booster transformer, etc. Its circuit is shown in diagram 24-32. Step-down rectifier consists of step-down transformer T1 and full bridge rectifier and filter capacitor C1, etc. The rectified 15V DC voltage passes three terminal regulator 7812 to regulated voltage and outputted +12V stable DC voltage, it can offer working voltage for IC2, VT1, etc. Astable multivibrator consits of 555 and R1, R2, C3, etc. Its oscilating frenquency is fc=1. 44/(R1+2R2)C3Parameter shown in diagram is designed according to 18. 5kHz. (View) The chart shown as the chart is the AC high voltage generator. It uses AC 220V input directly, and it has the features of with small size, high efficiency, long working time, high output current and so on.

A type can work continuously for longer than five minutes, B type can work in long hours. Component selection: VD1 ~ VD4 use 1N4007 diodes, C1 uses 10 F/400V dielectric capacitor; C2 uses nonpolar 0. 47 F/450V capacitor; R1 uses the 10k/5W resistor; R2 uses the 1/8W 10K resistor, R3 uses the 1/8W 1. 6M © ~ 1. 8M © resistor, VS uses the 3A/400V unidirectional thyristor, C3 ~ C5 use high pressure lOOp/14kV ceramic capacitors, C6 selects the lOOOp/40kV capacitor with engineering plastic shell.

(View) The multi-function high-voltage electrostatic generator is based on 555, if matching with high back voltage diode and discharge brush pin, it can be used as a negative oxygen ion generator, ignition, static vacuum cleaner, or high security, etc. 555 and R1, R2, C2 form a multivibrator with non-steady state, the oscillation frequency F = 1. 44 / (R1 +2 R2) C2, the argument in the figure is about 20KHZ. After boosted by the transformer T1 then it will get 20KHZ 10KV high voltage on secondary of T1, and it will be 7KV after rectified by D1, the load current can reach 50UA.

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