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Stage Chain Motor|

Overload Protection Of Stage Chain Motor

Time：2025-07-01

Brief Explanation :

The overload protection of stage chain motors is a comprehensive system. Its core lies in quickly cutting off power or limiting torque through electrical monitoring, mechanical restriction, and intell

Category : W12 Stage Electric Hoist

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Product Details

The overload protection of stage chain motors is primarily achieved through three mechanisms: electrical protection, mechanical protection, and intelligent control. These mechanisms prevent the motor from overheating, burning out, or suffering mechanical damage caused by excessive loads (such as chain jams or overweight objects). Below are the specific implementation methods:

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Electrical Protection Mechanisms This method triggers protective actions (e.g., cutting off power, issuing an alarm) by monitoring abnormalities in the motor’s current, temperature, or voltage. Current Overload Protection Principle: When the motor is overloaded, its operating current exceeds the rated value. Protection is triggered by detecting this current increase.

Implementation Methods:

- Thermal Relay: Utilizes heat generated by current passing through a heating element to deform a bimetallic strip, which then pushes contacts to disconnect the circuit. Advantages include low cost and high reliability; disadvantages include slower response time (seconds) and manual reset requirements.

- Electronic Current Sensor (e.g., Hall sensor): Continuously monitors current in real time. When the current exceeds a preset threshold (e.g., 1.5–2 times the rated current), the control circuit cuts off the contactor or circuit breaker. Advantages include fast response (milliseconds) and precise threshold setting, making it commonly used in high-precision stage equipment.

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