Jiu Ju Magnetizer
How Long Will a Bulging Capacitor Last? Identifying Capacitor Faults and Replacement Procedures for Magnetizing Machines—Jiuju Magnetizing Machines
End-to-End Solution for Magnetization Automation
Automated Magnetic Charging Integrated Solution
Q1: During an inspection, I noticed that the top of a capacitor was bulging, but it still charges and discharges normally. Should I replace it immediately?
A: Production must be halted immediately and the capacitors replaced; do not take any chances. A bulging capacitor indicates that gas has formed inside and the pressure relief valve has already been activated. The internal pressure in pulse energy storage capacitors is very high, and since the magnetizing machine cycles through charging and discharging several thousand times a day, each discharge exerts an impact on the bulging area. Last year, a factory in Guanlan, Shenzhen, continued using a bulged capacitor for two weeks without replacing it. During the night shift magnetization process, it exploded, spraying electrolyte all over a cabinet and rendering all three control boards completely unusable. Production was halted for five days for repairs. A bulge is the capacitor’s way of telling you it’s about to fail—listen to it.
Q2: Is it normal for the capacitor casing to feel hot to the touch? At what temperature is it considered abnormal?
A: When a magnetizing capacitor is operating normally, the temperature rise of its casing generally does not exceed 15°C. At a room temperature of 25°C, the casing is approximately 40°C—it feels warm to the touch but not hot. If, after several charge-discharge cycles, the casing becomes noticeably hot to the touch—exceeding 60°C—you should be on alert. The root cause of this overheating is an increase in the internal equivalent series resistance (ESR). Here’s a practical tip: Use an infrared thermometer to check the temperature of each capacitor’s casing at each shift change. If you ever find that a capacitor is more than ten degrees higher than the others, it’s nearing the end of its life—replacing it individually is much more cost-effective than waiting for it to fail. If the ESR has more than doubled compared to the factory value, it’s time to replace it—you can easily check this with an LCR meter.
Q3: Which is more dangerous: a leaking capacitor or a bulging capacitor?
A: A leak is more dangerous because it’s hidden. A bulge is visible at a glance, but a leak often occurs when the bottom seal ages and the electrolyte seeps out slowly from the base—you won’t notice it unless you bend down to look. The leaked electrolyte will corrode the insulating board and terminals beneath the capacitor. Over time, as it dries, it leaves behind conductive salt residue, which causes tracking and arcing as soon as power is applied. The electrolyte is acidic and will corrode the copper busbars and aluminum base plates, leaving them pitted and uneven. During weekly inspections, use a flashlight to check the bottom of the capacitors and the bases of the terminals. If you find any wet marks, replace the capacitor immediately and check adjacent capacitors for contamination from splashed electrolyte.
Magnetization of Magnetic Materials
3C Electronic Magnetization
Motor Rotor Magnetization
Car Speaker Magnetization
New Energy Vehicle Industry
Medical Equipment Industry
Other Industries
Video on Automatic Magnet Magnetization—Jiuju Magnetizer
August 17, 2026
Magnetization itself is a physical process that takes place in milliseconds; what truly slows down the overall production cycle are the manual loading, unloading, and alignment and calibration steps. In manual magnetization mode, workers must pick up and place each part individually and verify the polarity direction, which takes several seconds per part. Production capacity fluctuates significantly depending on the workers’ skill level and fatigue, and the strong magnetic field environment also poses safety hazards.
Magnetization for Magnetic Phone Chargers – Precisely Aligned with Core Magnetic Charging Processes
November 13, 2025
We specialize in magnetization and testing services for magnetic phone charger heads and magnetic data cables. Using precise magnetization processes, we ensure stable magnetic performance of charger heads and professionally verify that data cables meet magnetic performance standards. This guarantees secure connections, reliable use, and compatibility with all mobile magnetic charging scenarios.
JIUJU Electronic Magnetizers: Solving Industry Pain Points and Achieving the Optimal Balance of Performance and Cost
November 11, 2025
JIUJU electronic magnetizers address the challenges faced by electronics manufacturers. Using transformer step-up and pulse phase-shift control technology, they ensure magnetization precision and efficiency. Intelligent dual cooling and optimized material selection reduce costs, achieving a balance of high performance and low cost while improving production efficiency.
Video on Automatic Magnetization of Bearing Steel—Jiuju Magnetizer
August 19, 2026
SK3 high-carbon steel is a type of carbon tool steel. It is not a permanent magnet material in itself, but can be made to possess stable magnetic properties through a specialized magnetization process, meeting the requirements of industrial applications such as magnetic bearings and positioning and holding.
Why Does the Tip “Stick” to the Screw? A Video Explanation of Magnetization—Jiuju Magnetizing Machine
August 2, 2026
Magnetic screwdrivers are typically made of alloy steel, which inherently possesses some residual magnetism. When magnetized, the screwdriver is placed in a strong pulsed magnetic field, causing the internal magnetic domains to align axially. Once the external magnetic field is removed, the screwdriver retains a stable magnetic field, enabling it to attract iron screws.
Case Study: Magnetizing and Restoring Vintage Audio Speakers—Jiuju Magnetizing Machine
July 6, 2026
In the field of audio collection and repair, due to the age of antique speakers, long-term use or storage environment, there are often magnet demagnetization problems, resulting in weak sound, declining resolution, low-frequency loss, losing the original sound quality level. Relying on professional magnetizing equipment and mature technology, JiuJu Automation has completed many cases of antique speaker magnetization repair, and the following combines real data and practical procedures to introduce the technology and examples in detail.
Video on Magnetizing Automotive Motor Rotors—Jiuju Magnetizing Machine
July 22, 2026
Jiuju Automation’s automotive motor rotor magnetization machine utilizes advanced magnetization technology to ensure a uniform and stable rotor magnetic field, thereby enhancing motor performance and efficiency. It is widely used in the manufacturing of drive motors for new energy vehicles.
Video Case Study: Magnetizing Machine for Automotive Motor Rotors—Jiuju Magnetizing Machine
July 5, 2026
”In traditional pre-magnetization processes, magnetizing the magnets in advance causes the magnetic poles to repel each other and attract iron filings during motor assembly, which limits yield rates and poses safety hazards.” The "assemble first, magnetize later" approach uses integrated magnetization technology to allow magnets to be precisely positioned in a non-magnetized state, with magnetization and shaping performed uniformly after assembly is complete. This innovation eliminates magnetic interference, enables the design of motors with higher rotational speeds, and boosts assembly efficiency by more than 30%. It is rapidly becoming the mainstream choice among manufacturers of new energy motors and servo motors.
JIUJU Four-Station Motor Magnetizer – A Revolutionary Solution to Enhance New Energy Vehicle Motor Manufacturing Efficiency
November 10, 2025
Professional Four-Station Motor Magnetizer Solution – Providing highly efficient, automated magnetization and testing integrated equipment for new energy vehicles, consumer electronics, and industrial motor manufacturers. Significantly boosts production efficiency by 300%, reduces labor costs, and ensures consistent product quality.
JiuJu Magnetic Stripe Magnetization Video Case: Medical Magnetic Stripe Magnetization
January 7, 2026
久巨充磁视频案例：医疗磁条充磁。久巨自动化（小巨人）提供充磁设备、表磁检测、磁路机整体方案，磁密波动±0.2%、即充即检。联系久巨自动化获取更多充磁方案报价，+86 134-2897-6919/180-0255-6337微信同号、邮箱sam@szjiuju.comThe
Video Guide on How to Select a Magnetizing Machine—Jiuju Magnetizing Machines
August 8, 2026
When selecting a magnetizing machine, most people focus solely on the main unit’s power as their first step—and this is precisely the biggest misconception. The magnetizing effect depends on the synergy between energy output and the magnetic field focusing provided by the fixture, not simply on the rated power.
A 20-Second Video Guide on How to Choose a Magnetizing Machine—Jiuju Magnetizing Machine
July 21, 2026
Learn how to select the right Jiuju magnetizing machine in just 20 seconds and easily find the model that fits your needs. You can check the specifications from multiple angles one by one. Start by determining the type of magnet in your product; different materials correspond to specific machine specifications.
3000V Magnetizing Machine and Chiller Operation Demonstration Video—Jiuju Magnetizing Machine
July 3, 2026
This issue provides a comprehensive guide to the standard operating procedures for ice water machines. Mastering the correct usage will effectively improve the equipment’s operational efficiency. Before starting the machine, inspect the piping, wiring, and water level to ensure there are no leaks and that all components are in good condition. Turn on the main power supply, check the equipment’s self-test status, and set operating parameters such as water temperature and pressure according to production requirements.
Video on the Wiring Procedure for a 3000V General-Purpose Industrial Magnetizer—Jiuju Magnetizer
July 2, 2026
Before proceeding, be sure to disconnect the equipment from the main power supply and verify that the unit is completely de-energized to prevent any live wiring work. First, inspect the power cord and connection cables to ensure there is no visible damage or wear, and that the connectors are free of debris and dirt. Match the connectors to the corresponding labels on the equipment, and connect the power supply line, magnetizing coil line, and control line in sequence. Ensure the plugs are securely locked into place, and arrange the cables neatly so they are not pinched or tangled.
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