Professional Electromagnet Manufacturers

Description of working principle
Energizing to generate a magnetic field:
When power is applied, current flows through the coil. According to Faraday's law of electromagnetic induction, a toroidal magnetic field is generated around the coil. The core and rotor (or armature) are magnetized, forming magnets with opposite polarities, thereby generating electromagnetic attraction force.

Magnetic force driving rotation:




When the magnetic field passes through the iron core, the iron core gets magnetized and becomes a strong magnet; the rotor (or armature) is placed in the magnetic field, and its internal magnetic domains are aligned, forming fixed magnetic poles. After both are magnetized, they present opposite polarities (such as N pole - S pole). According to the principle that opposite magnetic poles attract each other, an interacting electromagnetic force is generated.






De-energizing to reset:





Electromagnetic force drives the rotor to rotate, achieving the conversion of electrical energy into mechanical energy.

Dear Valued Customers,
As the 2026 Chinese Spring Festival draws near, we extend our heartfelt gratitude for your long-term trust and support for Ningbo Jianyuan Electric's electromagnet products and services. To ensure the smooth operation of your business during the holiday, we hereby release the detailed arrangements for logistics, delivery, and after-sales service during the holiday period. Please kindly take note to make proper preparations.








1. Spring Festival Holiday Schedule
Based on national statutory holidays and the company's operational needs, the holiday arrangement is as follows:


Holiday Period: February 13, 2026 (the 26th day of the 12th lunar month) to February 23, 2026 (the 7th day of the 1st lunar month)


Official Resumption Date: February 24, 2026 (the 8th day of the 1st lunar month)



2. Electromagnet Product Order & Shipping Schedule
To guarantee the timely delivery of your orders, please pay attention to the following time nodes for order submission and confirmation:


Standard & Customized Electromagnets: Please complete order placement and confirmation by January 15, 2026. We will prioritize production and shipping arrangements. Conventional electromagnets (including magnetic lugs, retaining magnets, rotating magnets, linear solenoids, etc.) will be shipped no later than February 12, 2026.


Custom-Made Special Electromagnets: For customized products such as high-temperature, high-frequency, or back electromotive force (EMF) electromagnets, due to their complex manufacturing and testing processes, please submit detailed technical specifications by January 15, 2026 to ensure sufficient production and inspection time before the holiday.



3. Holiday Shipping Adjustments


February 13 - 23, 2026: All regular electromagnet shipments will be suspended.


Emergency Support: For urgent electromagnet needs in special fields such as medical equipment or scientific research instruments, please contact our on-duty hotline directly. We will do our utmost to coordinate and provide solutions.



4. Post-Holiday Shipping Resumption


Starting from February 24, 2026: Full resumption of production, testing, and shipping of electromagnet products.


Order Processing: All electromagnet orders received during the holiday will be processed in chronological order starting from February 24.



5. Electromagnet-Related Service Arrangements
During the holiday period, the technical support and consultation services for electromagnets will be adjusted as follows:


February 13 - 15, 2026: Online technical consultation services will be available (covering electromagnet selection, application solutions, installation and commissioning guidance, etc.). Please note that there may be a slight delay in response time.


February 16 - 22, 2026: Technical consultation services will be suspended. For urgent issues, you can leave a message through our official channels, and we will prioritize handling them upon resumption of work.



6. Logistics Partner Reminder
Major logistics partners (including air, sea, and land transportation) will have adjusted service hours during the Spring Festival. To avoid project delays caused by logistics disruptions, we strongly recommend you plan the delivery schedule of electromagnet products in advance.



7. Pre-Holiday Inventory Check Reminder
We advise you to check your electromagnet inventory in advance, especially for easily worn components (such as coils and magnetic conductors). Please arrange restocking in a timely manner if there is a shortage to ensure the normal operation of your production during the holiday.



8. 2026 Project Planning Support
For electromagnet application projects scheduled for 2026, please arrange technical consultation before the holiday. We will sort out and process related project requirements in priority order upon resumption of work.

9. Post-Holiday Special Service
We will launch a special service for new projects after the holiday: providing priority production of electromagnet samples through our express prototyping channel to accelerate the progress of your new projects.
Once again, we express our sincere gratitude for your continuous trust and support. As we embrace the Year of the Horse 2026, we look forward to continuing our cooperation and providing you with more stable, efficient, and innovative electromagnetic solutions. Wish you and your team a joyous Spring Festival, prosperous business, and happy family in the new year!

Holding electromagnets are critical components in various industries, used to attract and hold ferromagnetic objects. Understanding the importance of duty cycle in these electromagnets not only extends their lifespan but also maximizes their efficiency. In this article, we delve into the workings of holding electromagnets and detail how proper duty cycle management can significantly impact their durability, specifically focusing on the Jianyuan Solenoid brand.

What is a Holding Electromagnet?Holding electromagnets are electromagnets designed to attract and hold ferromagnetic materials. They are widely used in industries such as automation, transport, and handling, where reliability and precision are paramount. The electromagnet's operation ensures that the ferromagnetic object is firmly held when the coil is energized, and the object falls away once the power is turned off. Importantly, these magnets function efficiently when the piece to be held is in direct contact with the electromagnet's poles, minimizing discrepancies in the magnetic field strength.

Function and Working PrincipleTypes of Electro Holding MagnetsHolding electromagnets are designed into two primary types:

Electromagnet-Type: When the coil is energized, the magnet attracts a steel object. When the current is turned off, the magnet immediately releases the object.Electro-Permanent Magnet-Type: This type uses a permanent magnetic force to hold the workpiece when the coil is off. Energizing the coil neutralizes the permanent magnetic force, releasing the object. Electro-permanent magnets are often preferred for applications requiring reliable holding power even when unpowered.Holding ForceThe holding force of an electromagnet is defined as the maximum force required to remove the ferromagnetic part from the magnetic holding surface of the solenoid. The value of this force is indicated in newtons (N) and is perpendicular to the surface of the solenoid. The maximum force efficiency is achieved when the object is in direct contact with the holding surface, without any significant air gap.

Residual ForceResidual force, or residual holding force, is the force exerted by the holding magnet after the magnetic field associated with the coil or permanent magnet is removed. This force ensures minimal holding strength, typically around 15-30% of the holding force, depending on the material and surface roughness of the workpiece.

ApplicationsElectromagnetic holding magnets are versatile and are utilized in numerous applications, ranging from industrial automation to material handling. These magnets are available in various designs, such as round, flat, and rectangular, to suit different needs. The versatility of holding electromagnets makes them essential in industries requiring precise and reliable holding solutions.

Understanding Duty CycleDuty cycle is the ratio of the time that an electromagnet is energized compared to the total cycle time (ON time / Total time). For example, a duty cycle of 50% means the electromagnet is operational for half of the total cycle time. Understanding the duty cycle is crucial for maintaining the electromagnet's longevity and performance.

Impact of Duty Cycle on LifespanEffects of High Duty CycleA high duty cycle can lead to overheating of the electromagnet, which can degrade its performance and potentially cause failure. Overheating due to continuous operation without adequate cooling time can damage the coil insulation and weaken the magnetic properties. It's crucial to maintain a balance to prevent overheating and ensure the electromagnet operates efficiently.

Effects of Low Duty CycleConversely, a low duty cycle can prevent the electromagnet from reaching its maximum utilization efficiency. While this can extend the lifespan to some extent, it may also lead to waste in terms of operational efficiency and control capabilities. Therefore, it's important to strike a balance between operational efficiency and longevity.

Proper Duty Cycle for Jianyuan Holding ElectromagnetsThe optimal duty cycle for Jianyuan holding electromagnets will vary depending on the specific application and operating conditions. Generally, to prolong the lifespan, it is recommended to operate the electromagnet at a duty cycle between 40% and 60%. This range allows sufficient operational time while providing enough rest periods for cooling.
For instance:
- Jianyuan Solenoid MK-P80/38: This model can operate efficiently with a duty cycle of around 50%, ensuring optimal performance and longevity.
- Neodymium Holding Solenoid MK-P34/18: Recommended duty cycle is approximately 55%, providing a balance between efficiency and service life.
Choosing the right duty cycle ensures that the electromagnet operates within safe limits while delivering reliable performance throughout its lifespan.

Preventing Overheating and FailureCooling TechniquesProper cooling techniques can significantly extend the lifespan of holding electromagnets. Here are some cooling methods:
- Natural Convection: Allow sufficient time between operations for the electromagnet to cool naturally.
- Forced Convection: Utilize fans or airflow systems to enhance cooling efficiency.
- Heat Sinks: Incorporate heat sinks or a cooling jacket to dissipate heat more effectively.

Regular MaintenanceRegular maintenance is essential to ensure the electromagnet operates optimally:
- Inspection: Regularly inspect components, especially the coil, for signs of wear or damage.
- Cleaning: Keep the electromagnet clean and free from dust and debris to prevent overheating.
- Diagnostics: Periodically perform diagnostics to monitor performance and detect any issues early on.

Case Studies and Success StoriesSeveral industries have successfully implemented proper duty cycle management to extend the lifespan of their holding electromagnets. Here are some examples:

Industry Example 1: ManufacturingA manufacturing plant implementing a 50% duty cycle for their Jianyuan holding electromagnets noticed a significant increase in operational efficiency and longevity. Regular maintenance and cooling ensured that the electromagnets operated efficiently, reducing downtime and increasing productivity.

Real-World ApplicationIn a material handling scenario, a logistics company operating with a 60% duty cycle for their Jianyuan electromagnets experienced a 30% reduction in maintenance costs and a 20% increase in operational efficiency. The proper management of duty cycle ensured that the electromagnets remained in service longer, providing ample returns on investment.

ConclusionUnderstanding and managing the duty cycle of holding electromagnets, particularly those from Jianyuan Solenoid, is crucial for maximizing their lifespan and efficiency. By adhering to optimal duty cycles and employing effective cooling and maintenance practices, you can ensure that your holding electromagnets operate reliably and efficiently for a longer period. Proper duty cycle management not only prolongs the electromagnet's lifespan but also maximizes operational efficiency, making it a win-win solution for various applications.

DC electromagnets are essential components in a wide range of industrial and commercial applications. They are known for their reliability, efficiency, and high holding force, making them indispensable in industries such as automation, robotics, and material handling. In this article, we delve into how Jianyuan Solenoid, a leading manufacturer in the field, ensures that their DC electromagnets achieve maximum holding force.
Jianyuan Solenoid is renowned for its precision manufacturing, innovative technologies, and robust quality control measures. With a commitment to excellence and a deep understanding of the intricacies involved in producing high-quality electromagnets, we aim to provide our customers with products that exceed their expectations.

Overview of DC ElectromagnetsDC electromagnets are electrically powered devices that generate a magnetic field controlled by a direct current (DC) electrical signal. They consist of several key components:
Coil: Made of insulated wire, the coil is wound around a ferromagnetic core to create the magnetic field.Core: Typically made of iron, steel, or other magnetic materials, the core concentrates the magnetic field and increases the overall magnetic flux.Case: Provides structural support and protects the components from environmental factors.The holding force of a DC electromagnet is crucial for ensuring reliable operation in various applications. It determines how well the electromagnet can retain its magnetic field, which is particularly important in applications requiring consistent and robust magnetization.

Advanced Materials and Technology for DC ElectromagnetsRare Earth MagnetsOne of the key factors in achieving high holding force is the use of advanced magnetic materials, particularly rare earth magnets. Jianyuan Solenoid leverages these materials to ensure maximum holding force in their electromagnets. Neodymium (NdFeB) and samarium cobalt (SmCo) magnets are commonly used due to their superior magnetic properties:

Neodymium Magnets: These are among the strongest permanent magnets available, with high magnetization and resistance to demagnetization at elevated temperatures. They offer a magnetic field that is ten times stronger than conventional ceramic magnets.Samarium Cobalt Magnets: Known for their high magnetic strength and excellent thermal stability, these magnets maintain their magnetic properties in extreme temperatures and high humidity environments.Specialized Manufacturing ProcessesThe manufacturing process for DC electromagnets involves several key steps:

Sintering: This process involves heating and cooling magnetic powders in a vacuum or controlled atmosphere to form solid blocks. Jianyuan Solenoid uses advanced sintering techniques to create dense, uniform blocks with optimal magnetic properties.Bonding: Some electromagnets use bonded magnets, where magnetic materials are mixed with a polymer binder and formed into specific shapes. This process allows for custom-designed electromagnets that can achieve precise holding forces.Case Study: Jianyuan Solenoid's Use of Rare Earth MagnetsConsider a recent case where Jianyuan Solenoid collaborated with a manufacturing plant to optimize their material handling system. The plant's existing DC electromagnets were not providing sufficient holding force, leading to frequent operational failures and inefficiencies.

Quality Control and Assurance in ManufacturingQuality control is a cornerstone of Jianyuan Solenoid's manufacturing process. We adhere to stringent industry standards and certifications to ensure that our electromagnets meet the highest quality requirements. Here are some of the measures we implement:
ISO Standards: Michael Devine, Senior Applications Engineer at Jianyuan Solenoid, serves on the ASTM International's A06 Committee on Magnetic Materials. This ensures our electromagnets meet ISO standards for magnetic properties and physical characteristics.
In-House Testing: Our in-house testing facilities allow us to perform rigorous quality checks throughout the production process. We test for magnetic strength, temperature resistance, and mechanical durability to ensure each electromagnet meets our strict criteria.
Certifications: Every electromagnet is certified to meet or exceed industry standards. We have extensive records of magnetic strength, weight, and other critical parameters to ensure traceability and accountability.

Real-World ApplicationsCase Study: Large Manufacturing Plant UpgradeA large manufacturing plant was facing challenges with their current material handling system. The plant's executives approached Jianyuan Solenoid for a solution. After evaluating their needs, we proposed custom-designed electromagnets with a 500 kg holding force.
Upon installation, the new electromagnets significantly improved the plant's efficiency. The high holding force ensured reliable material handling, reducing downtime and increasing overall production capacity. The plant managers were satisfied with the performance and praised Jianyuan Solenoid for delivering a solution that exceeded expectations.

Industry TestimonialsHawkeye Precision Metals:Application: Material Handling System UpgradeFeedback: Since installing Jianyuan Solenoid's DC electromagnets, our material handling system has seen a noticeable improvement in efficiency and reliability. The high holding force has greatly reduced downtime and increased our overall production capacity.
Steel Dynamics, Inc.:

Application: Automated Material HandlingFeedback: We were skeptical about the claim of superior holding force, but the performance of Jianyuan Solenoid's electromagnets has been outstanding. Our material handling system has never operated more smoothly.Tariff and Supply Chain FactorsImpact of TariffsIn recent years, tariffs on imported goods, including electromagnets, have increased significantly. The tariff landscape affects the supply chain and pricing of electromagnets:

Current Tariff Rates (April 2025): As of April 2025, the United States has implemented a series of tariffs on Chinese goods, including electromagnets. The current rate is 145%, which includes additional fentanyl tariffs. This increases the overall cost of imported electromagnets and puts pressure on manufacturers to manage pricing and quality control.Jianyuan Solenoid's ResponseDespite these challenges, Jianyuan Solenoid remains committed to providing high-quality electromagnets. We have implemented several strategies to navigate the tariff landscape:

Supply Chain Monitoring: We closely monitor global developments and adjust our supply chain as needed to maintain consistent product availability.Cost Management: We explore alternative sourcing strategies to control costs without compromising quality. Our rigorous quality standards ensure that all components meet our high standards.Transparent Updates: We provide timely information on pricing or delivery changes to help our customers plan proactively and make informed decisions.ConclusionJianyuan Solenoid's commitment to precision manufacturing, advanced materials, and rigorous quality control ensures that our DC electromagnets achieve maximum holding force. Our electromagnets are trusted by leading manufacturers and businesses across various industries.
By incorporating advanced magnetic materials and specialized manufacturing processes, we deliver electromagnets that outperform standard products. Our commitment to quality control and adherence to industry standards ensures that every electromagnet meets or exceeds customer expectations.