Corrugated plate heat exchanger

Electric permanent magnet is a permanent magnet holding device that applies electric pulse control. It has the advantage of flexible operation of electromagnetic devices, and at the same time, it has the benefit of permanent magnet devices that are not afraid of power failure and avoid workpiece falling. It also has a series of advantages such as low energy consumption, simple maintenance, and long service life, making it an ideal tool for handling and feeding steel plates.

An electric permanent magnet is composed of two different permanent magnet materials and an excitation coil. When a sufficiently large positive pulse current is received at both ends of the electric permanent magnet coil (automatically disconnected after 0.5-2 seconds), the polarity of the reversible permanent magnet material is changed, and the magnetic fields generated by the two permanent magnet materials are parallel and act on the workpiece at the same time. The electric permanent magnet is in an excited state, which can attract and maintain the workpiece for a long time. If a negative pulse current of the same magnitude is received at both ends of the coil (automatically disconnected after 0.5-2 seconds), the polarity of the reversible permanent magnet material is changed, so that the magnetic fields generated by the two permanent magnet materials are connected in series and cancel each other out. If the magnetic field does not act on the workpiece, the electric permanent magnet will demagnetize, and the workpiece will release and maintain a demagnetized state for a long time.

By scientifically designing the magnetic poles of electric permanent magnets, it is possible to ensure that only one steel plate of different thicknesses is suspended.

1) Unlike the electromagnetic conversion working principle of traditional electromagnetic cranes, electric permanent magnets rely on the permanent magnetic force of permanent magnetic materials to hold workpieces, without consuming any electrical energy during the working process. Sudden power outages or line failures in the power grid have no impact on the holding force of the electric permanent magnet. No need for emergency power supply from batteries, and there will be no personal or equipment accidents caused by falling workpieces.

2) Electric permanent magnets only require instantaneous power consumption when converting within the magnetic circuit, with a power consumption time of approximately 0.5-2 seconds. Energy consumption is extremely low, with almost no operating costs (saving a lot of electricity consumption every year).

3) No need for batteries as power outage protection, eliminating the need for regular maintenance and replacement of batteries. At the same time, there is no prolonged current flow during operation, and the internal coils of the disk have a long lifespan. Save a lot of maintenance costs and downtime losses.

4) Easy to operate, with only two operations: excitation and demagnetization.