Design of a Full-Wave Controlled Rectifier Circuit for Crane Brake Using MOSFET Feedback and Programmable Off-Delay Relay

The braking system of an overhead crane is critical for ensuring operational safety, precision, and equipment longevity. Traditional crane brake rectifiers, typically based on simple diode bridge circuits, often exhibit limitations such as voltage instability, lack of delay control, and overheating, which can compromise the overall braking performance. This paper introduces the design and development of a new, intelligent crane brake rectifier aimed at overcoming these challenges. The proposed system integrates a full-wave bridge rectifier and a programmable delay-off circuit to manage brake release time more effectively. Additionally, the design incorporates surge protection and freewheeling diodes to handle transient voltages and prevent damage to the electromagnetic brake coil. By using a combination of modern semiconductor components, the system achieves enhanced response time, reduced thermal stress, and improved reliability. Experimental testing under real crane operating conditions demonstrates the system’s superior performance in terms of braking smoothness, voltage regulation, and energy efficiency. This innovative rectifier offers a cost-effective and scalable solution for modernizing crane braking systems in industrial applications

کلیدواژه ها:

Crane Brake Rectifier ، Electromagnetic Braking ، Delay-Off Circuit ، Thyristor Control ، Industrial Safety Systems