Electro-permanent magnetic lifters counter the constraints of everlasting and electromagnets by combining the benefits of each.
The restricted lifting capability of everlasting magnetic lifters and the non-failsafe operation of electromagnetic lifters are two limitations of these kinds of lifters. To beat these limitations, lifting magnet designers have created the electro-permanent magnetic lifter, which mixes the benefits of each the everlasting and electromagnetic lifters in a single module.
Forms of Magnets
There are three kinds of magnetic lifter applied sciences: everlasting magnetic, electro-magnetic and electro-permanent magnets. The everlasting lifting magnets use failsafe, everlasting magnets, however they don’t have a variable holding energy functionality, which restricts each their load capacities and the number of purposes they’re greatest fitted to.
Electro-magnetic lifters use a controller to generate a DC voltage in a coil embedded inside the lifter module to generate the magnetic work holding pressure. The DC controller’s voltage may be adjusted to range the magnetic flux area, which, in flip, varies the holding pressure of the electromagnetic lifter. This characteristic makes electromagnetic lifters versatile holding units and really cost-effective as properly. However electromagnetic lifters require steady electrical energy to function. An influence failure will de-energize the electromagnet, shut down the magnetic area, and create a possible security hazard. Electro-permanent magnetic lifters counter these limitations.
Electro-permanent Lifter Operation
Electro-permanent magnetic lifters (generally known as electroperms) are a hybrid of the everlasting and electromagnetic sorts. They’re constructed with a coil wound round a magnetic materials that’s everlasting, embedded within the lifter module. When a DC voltage is utilized, the fabric is charged, which takes about 1 second, and attracts the fabric to the lifter even after energy is eliminated. The lifter will maintain the load till the electro-permanent magnet is turned off. This options provides electro-perms a failsafe operation.
One other operate of the electroperm’s coil is to manage the quantity of magnetic pressure of the lifter. This characteristic provides it a variable holding energy functionality just like electromagnetic lifters. This characteristic extends the kinds of purposes the electroperm is fitted to. Electroperms can be utilized in tandem for beam lifting operations in addition to for mild load, choose and place, robotic operations. For choose and place operations, the electroperm is modified to be light-weight for maximizing end-of-arm capability. They’re constructed with particular coil configurations for quick switching with minimal dwell occasions and tender pole sneakers contoured to offer the simplest entry to the half.
Electro-permanent magnetic lifters are typically known as battery lifters as a result of a battery as a substitute of a D.C. controller is used to offer the facility for the electroperm switching cycle. The battery provides the lifter portability. It additionally makes for an easier system design as a result of a fancy D.C. controller just isn’t needed. Nevertheless, the battery would require upkeep and periodic charging.