When it comes to parking, there are two main types: "free parking" and "brake parking." Free parking is when the motor is quickly turned off, allowing it to stop naturally due to its inertia (known as OFF2 parking). On the other hand, brake parking involves actively stopping the motor using different methods.
Brake parking includes several techniques. One is DC braking, where a certain amount of direct current is applied to the motor. Another is dynamic braking, which uses resistance to absorb energy. There's also hybrid braking, combining DC and dynamic braking. Feedback braking injects current back into the grid, while mechanical braking uses physical brakes to slow down the motor.
Parking can be categorized into ramp parking and free parking. Free parking relies on the motor’s natural deceleration, while ramp parking involves controlled deceleration. Fast parking is a type of ramp parking with a steeper slope.
Braking methods vary depending on the situation. Mechanical brakes, such as disc or drum brakes, are commonly used. Energy-based braking includes resistor braking, reverse braking, and DC braking. Feedback braking is another method that returns energy to the power system.
Whether or not braking is necessary depends on the motor's operating conditions. If the required stopping time is shorter than what free parking allows, braking becomes essential. Even during normal operation, braking may be needed—for example, when lowering a hook or controlling speed in an elevator system.
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