High-Voltage Doorhandle Capacitors: Nondestructive Testing Equipment

Insights into the finest details, the cornerstone of energy: How high-voltage doorhandle capacitors become the "heart of stability" for nondestructive testing equipment
In the field of industrial nondestructive testing, whether it's X-ray testing, ultrasonic testing, or eddy current testing, the essence is to reveal the secrets within materials through precise energy control. The starting point for all of this is often a stable, pure, high-voltage power supply system. High-voltage doorhandle capacitors are the indispensable cornerstone of this system's energy stability.

Nondestructive Testing Equipment's Stringent Requirements for High-Voltage Power Supplies
The core task of nondestructive testing equipment is to provide precise excitation for test probes (such as X-ray tubes and ultrasonic transducers). This requires high-voltage power supplies to possess:

Extremely high stability: Even slight fluctuations in the output voltage will directly reduce the signal-to-noise ratio of the test signal, resulting in false positives or missed detections.

Extremely low ripple and noise: Pure DC voltage is essential for ensuring accurate test data and clear images.

Strong shock resistance: Frequent switching and load changes in equipment can impact the power supply, requiring robust components.

The Core Functions of Doorknob Capacitors: Filtering and Energy Storage
In high-voltage power modules for nondestructive testing equipment, doorknob capacitors primarily play the key roles of DC link filtering and transient energy buffering.

Filtering: Effectively filters high-frequency ripple generated by the switching power supply, outputting a smooth, mirror-like DC high voltage, providing "clean" energy for loads such as X-ray tubes.

Energy Storage: During transient load changes (such as during X-ray tube exposure), they provide instantaneous high current, stabilize the bus voltage, and prevent voltage drops.

Our Solution: Built for Precision and Reliability
Our specially designed doorknob capacitors meet the stringent requirements of nondestructive testing, offering the following core advantages:

Excellent Voltage Stability: Utilizing highly stable Class II or Class III ceramic dielectrics, the capacitance value exhibits minimal variation under varying DC bias conditions, ensuring long-term output voltage stability.

Extremely Low Equivalent Series Resistance (ESR): A unique internal electrode design and material processing result in ultra-low ESR, effectively filtering high-frequency ripple, significantly reducing self-heating, and improving power supply efficiency.

Robust mechanical and electrical construction: The iconic "doorknob" screw terminals provide a robust mechanical connection and excellent current-carrying capacity. Epoxy resin vacuum potting ensures excellent moisture and dust resistance, making it suitable for a variety of industrial environments.

Choosing our high-voltage doorknob capacitors means choosing a robust and stable "heart" for your nondestructive testing equipment, laying a solid foundation for every accurate diagnosis.

Xian Xiwuer Electronic & Info. Co., Ltd. is a wholly state-owned company with a registered capital of 91.46 million RMB Yuan, owning a total assets of 315 million RMBYuan, under the jurisdiction of Xi'an State-owned Assets Supervision & Management Committee. There are about 400 employees, with an annual sales income of 250 million RMB Yuan.

The main products include Zinc Oxide Varistors, thermistors, H-V ceramic capacitors, SPD, and Solar Energy Surge Protective Devices. The company has advanced production equipment, including 18 large sintering furnaces, 8 automatic assembly lines, the largest energy impulse current generator and a series of special test equipment and environmental test equipment. In the same industry in China, the company has the largest production capacity and the highest degree of automation with the most complete testing methods.

Our employees are 8 with master's degrees and more than 80 engineers with senior technical titles. 12 technicians have been awarded Experts with Outstanding Contributions by the Xian municipal government, and 1 expert has been enjoying a special allowance from the State Council.

The company has five sites for business production and operation, covering an area of 50,000 square meters. Its construction area is up to more than 54,000 square meters.

· No.99, Fengqing Road, Lianhu District, Xi an(ceramic capacitor)

· No.1118, Ziqaing Road, Xincheng District, Xi' a (Headquarters, varistors, thermistors)

· No.11, Longshou South Road, Lianhu District, Xi' a (Registration, photovoltaic lightning protection box)

· Block A, No.18, Gaoxin Road, High-tech District, Xi' an

· Jinghe New Town Xi Xian New Area(the new plant)

• Xian Xiwuer Electronic and Info. Co., Ltd. is a wholly state-owned company with a registered capital of CNY 101.465 million (exchanged to USD 15.85 million), owning total assets of CNY315 million (traded to USD 49.22 million). It was established in 1976. Currently, it has about 460 employees, with an annual sales income of CN280 million (exchanged to USD43.75 million). The company has four production and business bases covering an area of 43052 square meters, and a construction area of more than 50000 square meters. The company has 8 persons with master's degrees, more than 80 engineers with senior technical titles 12 technicians who have been awarded Experts with Outstanding Contributions by the Xian municipal government, and 1 expert who has been enjoying a special allowance from the State Council.

• The main products include

            • Smart Embedded Epoxy Pole；

            • Integrated Instrument Transformer

• Capacitive Voltage Divider；

• High Voltage Capacitor Rod；

• High Voltage Film Capacitor；

• High Voltage Resistor；

• Primary and Secondary Integrated Intelligent assembly and components with the function of voltage measurement, current measurement, protection, temperature monitoring, and power supply；

• Medium-High Voltage components/parts/ assembly；

• Surge Protective Device for Power Supply System；

• Chips for lightening devices；

• Zinc Oxide Varistor；Thermistor.

Major Customers: ABB, Schneider, GE, ZTE, XD Electric, XJ Electric, PingGao Electric and etc.

• The company has the provincial Technical R&D Center. The company has developing and manufacturing experiences of the key products HV Ceramic Capacitor, SPD, Varistor, Thermistor and for nearly 20 years. There have been 32 patented technologies, 4 invention patents, and 4 national key new products. The company is in the leading position in the same industry. The company has grown very fast with a unique management system which is the fundamental guarantee to the continuous development of the enterprise under the state-owned system. In Northwest China, the company is the first to implement ISO 9001 standards and the first to promote the use of ERP management systems, having achieved ISO9001, ISO14001, and ISO45001 approval, thus standardizing and improving the management level of the company.
• Through continuous technological innovation, product R&D, and quality improvement the main technical performance and reliability of the products are at the internationally advanced level the same level as Panasonic and Siemens. The products have UL, VDE, TUV, CAS, CE, CQC, RoHS, and REACH certifications. The company has advanced production equipment among which the key production equipment and modern assembly lines are imported from Japan, the U.S.A, Germany, Korea, and Belgium including 26m large sintering tunnel furnaces8 automatic assembly lines, the largest energy impulse current generator and a series of special test equipment and environmental test equipment. In the same industry in China, the company has the largest production capacity and the highest degree of automation with the most complete testing methods. The company has two routine test laboratories with the most advanced lightning testing equipment and environmental testing equipment which comply with national standards for laboratory construction. They are the significant laboratories supported by Shaanxi Province with professional testing technicians undertaking part of the supervision and inspection of electronic products in Shaanxi Province at the same time.
• We believe we are able to supply satisfied goods and services to customers at home and abroad with the most reasonable price and the shortest delivery time. on the basis of our excellent quality assurance capacity, technical development capacity, and rich manufacturing experiences.

Through continuous technological innovation, product R&D, and quality improvement, the main technical performance and reliability of the products are at the international advanced level, at the same level as Panasonic and Siemens. The products have UL, VDE, TUV, CAS, CE, CQC, RoHS, and REACH Certification