中文版
Description
The selection of SAFT-169-PAC motor is mainly based on the type of motor, structural type, capacity, rated voltage and rated speed.
The basic principles of SAFT-169-PAC motor selection are:
(1) Select the type of motor according to the requirements of speed regulation of production machinery.
(2) The capacity of the motor should be fully utilized during the working process.
(3) Select the structure type of the motor according to the working environment.
It should be emphasized that priority should be given to the use of three-phase AC asynchronous motors with simple structure, cheap price and easy maintenance under the condition of meeting the design requirements.
Correct selection of motor capacity is the key problem in motor selection. There are two methods to calculate the motor capacity, one is the analytical calculation method, the other is the statistical analogy method. The analysis and calculation method is to estimate the working condition of the motor according to the mechanical power, pre-select a motor, and then make a load diagram according to the actual load of the motor, check the temperature rise according to the load diagram, and determine whether the pre-selected motor is suitable, and then re-select when it is inappropriate, until the motor is suitable.
The analytical calculation of the motor capacity is described in detail in the relevant works and will not be repeated here.
In the relatively simple, no special requirements, production quantity and small electric drive system, the selection of motor capacity is often used statistical analogy, or according to experience using engineering estimation method to choose, usually choose a larger capacity, reserve a certain margin.
There are generally two types of motor braking methods: mechanical braking and electrical braking. The common methods of mechanical braking are: electromagnetic lock brake and electromagnetic clutch brake. The commonly used braking methods are energy consumption braking, reverse braking and feedback braking.
The advantages of SAFT-169-PAC reverse braking are: strong braking force and rapid braking. The disadvantages are: poor braking accuracy, strong impact during braking, easy to damage the transmission parts, large braking energy consumption, not suitable for frequent braking. Therefore, the reverse braking is generally applicable to the braking requirements of rapid, large system inertia, not often start and brake occasions.
The advantages of energy consumption braking are accurate, stable and less energy consumption. The disadvantage is that the additional DC power supply device is required, the equipment cost is high, the braking force is weak, and the braking torque is small at low speed. Therefore, energy consumption braking is generally used for occasions that require accurate and stable braking.
Feedback braking is a relatively economical braking method. When braking, it can be automatically transferred from the electric running state to the generating braking state without changing the line, and the mechanical energy can be converted into electric energy and then returned to the power grid, which has remarkable energy-saving effect. The disadvantage is that the application range is narrow, only when the motor speed is greater than the synchronous speed to achieve generating braking.
Please contact Sunny sales@xiongbagk.cn for the best price.
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