5 questions about magnets

1. Is there equipment available that can help extend magnet service-life?

Yes, there are monitors and meter packages that aid in the safe use and prevention of premature magnet failures. Both devices aid operators in tracking and measuring electrical performance.

The primary difference is that the monitor provides alerts when magnet current limits have been exceeded and will disable subsequent lifts. Both pieces of equipment are valuable tools for extending magnet service-life.

2. How can I minimize or prevent damaging my magnet power leads?

One of the most effective ways to prevent damage to magnet power leads is through the use of a cable protection system.

The Bullet® Cable Protector [as shown in image] prevents abrasions, nicks, cuts and heavy impacts which are leading causes to premature magnet and electrical system failures.

3. What are the differences between DC constant potential and solid state magnet controllers?

A DC constant potential controller utilizes electro-mechanical components to safely charge and discharge magnetic fields. These units historically require constant maintenance and do not provide any protection or diagnostic features.

Solid-State controllers are virtually maintenance-free “intelligent” devices that protect magnets, power systems and personnel from potentially dangerous conditions. These units also increase cycle times and throughput with faster charge times and cleaner drop cycles.

4. What are the advantages of an AC to DC magnet power system?

An AC to DC power system utilizes a maintenance-free, brushless AC generator.

The output voltage is converted through the use of a solid-state controller to produce DC magnet power. AC versus DC generators offer a wider operating speed range and output voltage is less dependent on the rpm’s. Additionally AC units are dimensionally smaller than equivalent kilowatt-rated DC generators.

5. Why is a magnet inspection program important?

A magnet inspection program is a primary tool for proactively preventing the high costs of repairs, aiding in the safe use and ensuring optimum performance.

The program should incorporate measuring and documenting electrical readings such as current, resistance and meg-ohms at consistent intervals. It is equally important to include visually inspecting the mechanical condition of your magnets (i.e. welds, wear depth, chain wear, etc.). Both procedures will aid in capturing minor problems before they become major issues.