Energy conservation is the main trend of current social development, and the development and application of permanent magnet synchronous electric spindle technology are receiving increasing attention from people. Today, let me briefly introduce the application of this technology. Permanent magnets developed based on this new technology Synchronous electric spindleHas the following characteristics:

No induced current

The permanent magnet synchronous electric spindle rotor has no induced current, low rotor heat generation, excellent hard torque characteristics, high speed stability under load fluctuations, and can maintain uniform rotation of the grinding wheel. Therefore, the surface quality of the processed parts is high.

Strong load-bearing capacity

The permanent magnet synchronous electric spindle can meet the power requirements below the rated speed, strictly follow the constant torque law, and has strong load capacity in a small range.

No excitation current

The rotor surface of the permanent magnet synchronous electric spindle is coated with permanent magnet steel, which directly forms the rotor magnetic field without the need for excitation current. The power factor is close to 1, and almost all stator currents are used for output torque, which has high working efficiency and can reduce motor losses.

The application of permanent magnet synchronous technology can save investment costs while improving efficiency; Improve the machining accuracy of the workpiece surface; Expand the scope of precision cutting and low-speed strong cutting; Realize energy conservation and consumption reduction.

In addition, this new technology also has many drawbacks, such as the maximum torque being constrained by demagnetization of permanent magnets, poor seismic resistance, and limitations on high speeds. Therefore, in practical applications, it is necessary to choose a suitable electric spindle according to the application requirements. I believe that technological progress can not only improve the excellent performance of permanent magnet synchronous technology, but also address its shortcomings, making it more widely used in practical production.

The foundation for achieving high-speed cutting in high-speed machine tools is the high-speed spindle unit, which is the core component and technical key of high-speed machine tools. Compared with traditional spindles, the main form of high-speed electric spindles is to directly install the stator and rotor of the spindle motor into the spindle assembly, forming an electromechanical integrated electric spindle, thereby achieving "zero transmission" of the machine tool system. It has the advantages of wide speed range, compact structure, small moment of inertia, fast response speed, easy implementation of stepless speed regulation and precision control.

However, in the past, the motors used in highly electric spindles were mainly asynchronous motors, which had high power losses. The power consumption and heat generation of the stator and rotor of the motor became the main heat source for high-speed machine tools. In addition, there are complex friction phenomena in the spindle bearings during high-speed operation, which also exacerbates the heating intensity of the electric spindle, causing the overall temperature of the electric spindle to rise and significant thermal deformation, thereby seriously affecting the machining accuracy of high-speed machine tools. In severe cases, bearings may still be burned out due to bonding, resulting in bearing failure.