We are a professional manufacturer of various electromagnets. The electromagnet industry has many specialized terms and jargon. To help users better understand electromagnet knowledge, SF electromagnet experts have compiled common terms and questions related to electromagnet. If you have any problem about customized electromagnet, please contact our experts.
Electromagnet Applications
21: What is a relay?
A relay is an electromagnetically operated switch used to control high-power circuits with low-power signals.
22: What is a magnetic separator?
A device using electromagnets to remove ferrous contaminants from materials like coal or grains.
23: What is a Maglev train?
A train levitated and propelled by electromagnetic forces, eliminating friction with tracks.
24: What is an MRI machine?
Magnetic Resonance Imaging (MRI) uses powerful electromagnets to generate detailed images of internal body structures.
25: What is a linear actuator?
A device converting electromagnetic energy into linear motion, used in robotics and automation.
Electrical Properties
26: What is coil resistance?
Coil resistance (R) is the opposition to current flow in the wire, measured in Ohms (Ω).
27: What is inductance (L)?
Inductance is the property of a coil to oppose changes in current, measured in Henrys (H).
28: What is back EMF?
Back electromotive force (EMF) is the voltage induced in a coil when the current changes, opposing the applied voltage.
29: What is Lenz’s Law?
Lenz’s Law states that the direction of induced current opposes the change in magnetic flux causing it.
30: What is skin effect?
Skin effect is the tendency of alternating current (AC) to flow near the surface of a conductor, increasing resistance.
Electromagnet Thermal Management
31: What is thermal class rating?
A classification (e.g., Class B, F, H) indicating the maximum temperature a coil insulation can withstand.
32: What is a heat sink?
A passive cooling device attached to an electromagnet to dissipate heat.
33: What is forced air cooling?
Using fans to blow air over coils to reduce operating temperatures.
34: What is thermal conductivity?
A material’s ability to conduct heat, measured in W/(m·K).
35:What is derating?
Reducing an electromagnet’s rated performance to account for high ambient temperatures.
electromagnet Control Systems
36: What is PWM (Pulse Width Modulation)?
PWM controls the average voltage/current by rapidly switching power ON/OFF, used to regulate electromagnet force.
37: What is a holding current?
The reduced current applied after initial activation to maintain force while minimizing heat.
38: What is a flyback diode?
A diode placed across a coil to suppress voltage spikes when the coil is de-energized.
39: What is a Hall effect sensor?
A sensor measuring magnetic field strength, often used for position feedback in electromagnets.
40: What is a PID controller?
A Proportional-Integral-Derivative controller used to regulate electromagnet force or position.
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About SF electromagnets factory
Shengfeng Electromagnet Co., Ltd. was established in 2015 and is located in the Xiansha Industrial Park with beautiful scenery and convenient transportation. The company covers an area of 16000 square meters and has modern production plants, advanced production equipment and a high-quality technical team. Since its establishment, we have always adhered to the corporate philosophy of “innovation, quality, and service”, focusing on the research and development and production of electromagnets, constantly promoting product upgrades and technological progress, and providing customers with the best quality products and services.
Why choose SF electromagnet
HIGH END QUALITY:As the best solenoid electromagnet manufacturer in china, our QC team will ensure every single product you receive are best quality. We have professional quality testing machine.
PRODUCT DESIGN:Our sampling department has complete process of making drawings into reality. We also improve your product design based on our years of working experience.Tell us what you think.
STABLE DELIVERY TIME:As the best electromagnet manufacturer & supplier,we have sufficient manufacturing capacity, big orders won’t beat us, we can still deliver the order for you in time.
BEST PRICE:We are source factory of electromagnet and the best solenoid manufacturer in China, that’s why we can provide high quality bags with best price.
PRECISE MANAGEMENT:Nothing can be achieved if we don’t implement precise management. We are a company with complete management system.
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FAQs of electromagnet
We are a Chinese top electromagnet manufacturer and our factory is located in Dongguan. Welcome to visit our factory!
We pecialize in the design and production of high quality electromagnet,solenoid valve,such as rotary solenoid, bistable solenoids, latching solenoids, open frame solenoids, tubular solenoids, self-holding solenoid
•Of course, usually we will provide free samples, and you only need to cover the freight. For custom electromagnet samples, pls send your requirements to us for checking the sample cost.
• It takes about 7 days for sample production.
Yes, we provide free design services, structural design and simple graphic design.
Sure. We can do any electromagnet with your design. Now we open a ODM solenoid which is for small quantity from 100pc to 500pc,but you can still have your own logo.
Depending on the order quantity and production details, it will take about 15 to 20 days.
Always a pre-production sample before mass production; Always final Inspection before shipment
• Power,usage,size, material, quantity, shipping destination, etc.
• You can also just tell us your requirements and we will recommend products to you.
• By sea, by air or by express.
• If you have your own freight forwarder in China, it is the ex-factory or FOB price.
•CFR or CIF, etc., if you need us to ship on your behalf.
• DDP and DDU can also be used.
• More choices, we will consider your choices.
• The price is determined by the quantity, material, processing method, size and other factors. In addition, due to our continuous
technological innovation, the prices of some of our products are extremely competitive, please contact us to quote.
