Push-Pull Electromagnet

A push-pull electromagnet (also known as a push-pull type solenoid or linear electromagnet) is an electromagnetic device that converts electrical energy into linear reciprocating mechanical motion. When the coil is energized, it generates an electromagnetic field that drives the moving core (plunger) to move axially, thereby executing a push or pull action; upon power disconnection, a return spring or external force returns the core to its original position. Its structure primarily comprises components such as a coil, a moving core, a stationary core, a housing, and a return spring.
Due to its compact structure, sensitive operation, rapid response, and ease of control, the push-pull electromagnet is widely utilized in fields such as automation equipment, security locking mechanisms, medical devices, and industrial machinery; it serves as an ideal actuator for implementing remote, centralized, and automated control systems.

Working Principle
The push-pull electromagnet operates based on the principle of electromagnetic induction: a coil is wound around a core made of a highly permeable magnetic material; when energized, the coil generates a magnetic field that exerts an attractive force on the moving core, driving it toward the stationary core. By selecting the appropriate mounting configuration—utilizing the shaft on the bolt-mounted side to generate a pushing action, or utilizing the shaft on the armature side to generate a pulling action—both types of motion can be achieved. Upon power disconnection, the magnetic field dissipates, and the return spring pushes the moving core back to its original position, thereby completing a full operational cycle.
1. The push-pull electromagnet is one of many types of solenoids; it is frequently referred to as a "through-type" or "impact-type" electromagnet, though collectively referred to herein as a "push-pull electromagnet." Its operation relies on an energized coil generating a magnetic field to impart kinetic energy to a plunger, driving it outward. The core components are fabricated from pure iron or silicon steel—materials selected for their high magnetic permeability (ease of magnetization) and rapid demagnetization properties—ensuring that the plunger extends and becomes magnetized only when power is applied, and that both its kinetic force and magnetism dissipate immediately upon power disconnection.
2. The product's housing is constructed from electrical-grade pure iron, while the coil bobbin is injection-molded using flame-retardant, reinforced nylon plastic, offering excellent insulation properties, flame resistance, and high-temperature durability. The coil itself is wound using enameled copper wire that meets national standards.
We have specialized in the R&D and manufacturing of electromagnets for many years, and our products are certified under the ISO9001 quality management system. We offer a one-stop service ranging from design and prototyping to mass production. Our entire product line features pure copper coils and high-permeability magnetic materials, ensuring stable suction force and rapid response times. Prior to leaving the factory, every product undergoes rigorous suction force testing and insulation inspections to guarantee stable and reliable quality.

Core Advantages
1. Selectable Push/Pull Modes; Flexible Installation: A single electromagnet unit can function as either a push-type or a pull-type device; users simply need to select the appropriate shaft end based on the required installation direction, thereby accommodating a wide variety of mechanical structural requirements.
2. Rapid Response; High Operating Frequency: Our push-pull electromagnets execute movements with crisp precision and speed; the actuation time can be as fast as 0.10 seconds, while the reset time is under 0.05 seconds. With an operating frequency reaching 3600–3800 cycles per hour, these units effectively meet the demands of high-speed automation systems.
3. Powerful Force; Adjustable Stroke: Our miniature models generate suction forces ranging from several kilograms to tens of kilograms, while our long-stroke models can deliver thrust forces exceeding 300 kilograms. The stroke length is fully customizable—ranging from a few millimeters to over 60 millimeters—allowing for optimization: shorter strokes yield greater force and faster response times, while longer strokes are ideal for applications requiring extended-distance operation.
4. Multiple Duty Cycles Available: Depending on specific operating conditions, users may select between intermittent or continuous power supply modes. The units are designed to sustain continuous power without overheating or burning out.
5. Comprehensive Voltage Specifications: A full range of voltage options is available to suit diverse application requirements.
6. Long Lifespan; High Reliability: Our standard models boast a mechanical lifespan exceeding 2 million cycles. Utilizing highly wear-resistant bearings and premium coil materials, these units deliver maintenance-free operation.

Important Considerations / Matters Needing Attention
To achieve maximum thrust and suction force values ​​during operation, the push-pull electromagnet must be utilized in accordance with the following conditions:
1. Electromagnet Operation Mode:
When power is applied, the movable core is drawn into the coil, generating a thrust/pull force. When power is disconnected, the force dissipates, and the movable core automatically returns to its original position via spring-assisted reset.
2. Electromagnet Energization Duration:
Energizing the electromagnet causes it to generate heat; therefore, it is not suitable for continuous, prolonged power supply (the duration of a single energization cycle should be less than 30 seconds). The unit is designed for periodic operation involving alternating cycles of energization and de-energization. Applying continuous power for an extended period—rather than in cycles—is functionally equivalent to inducing an electrical short circuit.
3. Proper Power Supply Selection:
It is recommended to utilize a switching power supply, a transformer, or a high-capacity lithium-ion battery as the power source. Please note: Do not attempt to power this device using small lithium batteries, dry cells, USB ports, power banks, microcontrollers, or circuit boards. These power sources are generally insufficient to drive the unit; due to the electromagnet's high power requirements, these sources will be unable to handle the load once connected, rendering the device completely inoperable.