The characteristic of constant torque load is that the load torque has nothing to do with the speed, and the torque always remains constant or basically constant at any speed. Constant torque speed regulation is used to characterize the load capacity of the variable frequency motor when adopting this speed regulation, and does not refer to the actual load of the motor.
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Star triangle start needs to meet the 380V/Δ connection conditions of three-phase asynchronous motor, and the stator winding is connected into a triangle when the motor is running normally to adopt the star triangle start method. Star triangle start is a step-down start, which is achieved by reducing the starting current at the cost of sacrificing power. Therefore, it can not be generalized to the size of the three-phase asynchronous motor power to determine whether it is necessary to use the star triangle start, but also to see what kind of load.
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Soft starting is to realize the smooth starting of three-phase asynchronous motor and mechanical load through technical means such as buck, compensation or frequency conversion, reduce the impact of starting current on the power grid, so that the power grid and mechanical system can be protected; The output torque meets the requirements of the mechanical system for starting torque, ensuring smooth acceleration, smooth transition, and avoiding the impact of destructive torque.
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Autotransformer step-down starting is to reduce the starting voltage on the stator winding of the motor through the autotransformer, also known as autotransformer step-down starting. After the three-phase asynchronous motor is started, the motor is separated from the autotransformer, so as to move normally under full pressure.
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Full voltage starting, also known as direct starting, is a common starting mode. The stator winding of three-phase asynchronous motor is directly connected to the power supply and started at rated voltage, which has the characteristics of large starting torque and short starting time. This starting mode is simple to operate and is a more reliable starting mode. The full voltage starting current is large, but the starting torque is small.
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The common external faults of the motor are mainly manifested in the following aspects, and the method of discharging the fault. Senli Motor Xiaobian simply lists some. Below, we will understand the common faults of the three-phase asynchronous motor.
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When the stator voltage of the asynchronous motor is changed, different speed can be obtained. Because the torque of the motor is proportional to the square of the voltage, the maximum torque drops a lot, and the speed regulation range is small, making the general cage motor difficult to apply.
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Variable frequency speed regulation is the most commonly used speed regulation of three-phase asynchronous motor, mainly the use of variable frequency speed regulation than the polar logarithm speed regulation and variable slip rate speed regulation have a higher speed range, and variable frequency speed regulation in the precision of speed regulation is also very high.
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The additional resistance is inserted into the rotor of the winding asynchronous motor, which increases the slip rate of the motor and makes the motor run at a lower speed. The greater the resistance in the series, the lower the speed of the motor.
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Hz is the abbreviation of Hertz, representing the number of times that the current periodically changes direction in a second, 50Hz means that the current has 50 cycles in a second, and the direction changes 100 times. Then why the AC frequency is set to 50HZ, the following and three-phase asynchronous motor manufacturers together to understand.
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Long axis torque motor products, suitable for winding and winding scenarios, can be customized for different industry scenarios, to meet the requirements of use. This product produced by Senli has the characteristics of reasonable structure, high efficiency, good characteristics and long service life.
Shengzhou Senli Motor19Old motor manufacturers, with a number of their own motor production lines, from the shell, shaft, rotor, stator are independent production, all products are the use of professional product quality supervision and testing equipment full inspection factory, can provide testing reports. From the shaft machining to the whole machine assembly are completed independently. Truly realize factory direct sales.
Senli motor products are used180°High temperature resistance all copper coil material, torque motor products can be used with different rotors (ordinary rotors/Steel rotor), rotor of different motor characteristics are different, we from the shell, shaft, rotor, stator are produced by the independent, all products are the use of professional product quality supervision and testing equipment full inspection factory, can provide testing reports.
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