What is the soft stop of the motor? -Solutions - Huaqiang Electronic Network

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Inductance

When a motor stops using traditional control methods, it typically involves an immediate power cut. However, in many applications, such sudden shutdowns are not acceptable. For instance, in high-rise buildings or building pump systems, an abrupt stop can cause a severe "water hammer" effect, which may damage pipes and even the water pump itself. To prevent this issue, a soft stop method is used, where the motor slows down gradually instead of stopping abruptly. This approach helps reduce pressure surges and protects the system from damage. Soft starters are designed to achieve this by slowly reducing the conduction angle of thyristors after receiving a stop command, eventually leading to a full shutdown over time. The stopping duration can be adjusted based on specific requirements, allowing for greater control and safety in various industrial and commercial settings. Additionally, using soft stop technology in pumping stations minimizes the risk of hydraulic shocks, lowers maintenance costs, and reduces the workload on engineers and technicians.