The China dc motor manufacturers is telling you about the energy efficiency of high voltage Motors.
On Energy Saving of High Voltage Motor:
High-voltage motors have a large installed capacity on cement production lines, and they are electrically loaded and have a large loss of reactive power. In the ratio of the installed capacity of high-voltage motors to power Transformers, the reactive power loss of motors accounts for about 70 % of all reactive power losses. Therefore, the energy-saving work of high voltage Motors must also be regarded as one of the key management tasks of large-scale cement production lines.
1) From the high voltage DC motor itself, the power factor Gaohe mechanical efficiency product should be selected. Now the market has also emerged a new type of high-efficiency energy-saving motor, but more applications in low-voltage electric machines. The nameplate of the high-pressure motor generally indicates that the power factor is about 85 %, and the low power factor will cause many problems, such as increasing the turnover rate and overheating of the motor. The problem of motor efficiency can not be ignored. When calculating motor power, efficiency must be calculated to truly reflect the output power of the motor itself.
2) The traditional way to increase the power factor to reduce reactive power loss is to install power compensation capacitors. The investment is small, the effect is fast, and the maintenance is simple. The power supply Department specifically assesses the power factor of the user's power grid in the user's electricity assessment, and rewards more than 90 % of users. Installation of power capacitors, one is centralized compensation, all capacitors are installed in specially designed capacitor rooms, and compensation is provided for the main platoons and lines in the distribution room.
In management, maintenance, but the high-pressure motor itself can not be compensated; The second method is to install on the spot next to the machine, directly connect with the high-pressure motor for compensation, or install in the motor switch cabinet. The approach is context-specific.
3) There are many other ways to save electricity. For example, the application of cameras has been in China for a long time. Although the energy saving effect is better, because it is also a rotating device, the maintenance workload of the equipment itself such as the rectifier is also large. The feature of the stationary phaser is to use the thyristor AC-AC frequency conversion control method instead of the camera to compensate the rotor of the motor. It integrates the advantages of the camera and the power capacitor and is applied to the ball mill to drag the motor. Very good. Can reduce energy consumption per unit and save electricity. Although the inverter that is now being used in large numbers is also an energy-saving product, it is more energy-efficient for equipment that requires frequent speed regulation. Not all motors can be used, and the one-time investment in high-voltage converters is also large
