电阻制动
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Dynamic brake is a braking system type designed to aid mechanical brakes when slowing down trains.
为防止制动蹄磨损和过热，大多数机车和轨道车都采用替代减速方式，例如变阻制动、液力制动和发动机制动。这些制动器使用车辆的动力总成作为减速手段，而不是依靠制动蹄的摩擦力。
Depending on the powertrain type, there are different types of dynamic brakes, such as rheostatic, hydrodynamic and engine brakes.