Automotive motor thermal protectors, also known as overload devices or inherent motor protection, are crucial for preventing electric motors from overheating and potentially failing. They detect excessive temperature or current and shut down the motor to prevent damage. These protectors are designed to protect the motor’s internal components, such as windings and insulation, from damage caused by overheating.
To install a motor thermal protector correctly, ensure it’s placed in a location that accurately detects the motor’s temperature, typically near the windings or stator. Proper wiring is crucial, and the protection settings should be adjusted based on the motor’s design and the operating environment.
The Thermostat Switch KSD301 bimetallic disc operates in a Normally Open (唔係) configuration. This means the circuit is initially open (disconnected) at normal temperatures. When the temperature rises to a predefined threshold, the bimetallic disc bends, closing the circuit and allowing current flow.
NC type is the “emergency brake” for safety protection, and NO type is the “temperature trigger” for intelligent control. The action logics of the two are complementary. The selection must strictly match the circuit function requirements (comprehensive).
The bimetallic strip is the “溫度傳感器 + actuator” integrated component of KSD301. Its disc-shaped structure design and alloy ratio directly determine the temperature control accuracy and reliability.
NTC公司 (負溫度系數) temperature sensor is a temperature measuring element that uses the exponential decrease in the resistance of a thermistor as the temperature rises. Its core is a ceramic semiconductor made by sintering metal oxides (such as manganese, cobalt, and nickel), and the temperature is inferred by measuring the change in resistance. The following are its core technical characteristics, 應用, and selection points:
空調溫度傳感器銅頭係銅管嘅檢測, 溫度傳導快; 膠頭一般用于檢測環境溫度, 耐腐蝕性, 高可靠性.
採用先進嘅傳感技術, 溫度測量精度非常高，誤差範圍非常小, 滿足你對精確溫度測量嘅需求.
選擇熱敏電阻時, 確實需要綜合考慮好多關鍵參數同包裝 (環氧樹脂封裝, 玻璃珠封裝, 薄膜封裝, SMD封裝, 不銹鋼探頭傳感器封裝, 注塑成型塗料). 讓我詳細告訴你:
熱敏電阻嘅電阻範圍好廣, NTC熱敏電阻嘅電阻範圍由幾十歐姆到一萬歐姆, 甚至仲可以根據需要定製特殊設備. 常用電阻值為2.5Ω, 5Ω, 10Ω, 等。, 常見嘅電阻誤差為±15%, ±20%, ±30%, 等. PTC熱敏電阻嘅電阻範圍通常為1KÓ至数百K≤.
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