Linear synchronous hybrid (stepper) motors

Relevance.

Modern technological equipment requires reliable highly dynamic and precise drive. For equipment in which the working bodies are rectilinear movement (drilling and milling machines, laser systems, cutting systems, plotters, precision positioners, etc.) is the most optimal actuator on the basis of linear motors.

a) The design advantages.
           engine design fits well into the design of the positioner has smaller dimensions, a simple structure, no moving parts. The use of aerostatic bearings can eliminate the mechanical connection between the moving and stationary parts of the engine.
b) Operational benefits.
          higher positioning accuracy due to the lack of backlash and vibrations, and at the lack of aerostatic bearings and friction. The higher speed of the lack of restrictions on the frequency of rotation of the screw and nut. So ballscrews maximum screw speed to 750 r / min. For screw pitch T = 20 mm at the maximum rotation speed of the screw is Vmax = 250 mm / sec = 0.25 m / s, while the speed of the linear motor may be equal to 5 m / s and the speed is limited only by the control system.
          higher operating range temperatures due to the lack of restrictions on the thermal expansion of the screw.
         Greater reliability and stability of parameters over time due to the lack of wear of mechanical parts with the application of aerostatic bearings.

Market.

          Consumers of linear motors are manufacturers of high-precision processing equipment (drilling and milling machines, laser systems, cutting systems, plotters, precision positioners, etc.) in the People's Republic of China, Russia, Ukraine and Belarus.

      Based on the above, is it appropriate to start manufacturing a broad series of linear motors for completing their different technological equipment

Description of structures of linear motors.

                   The moving part of the engine is a set of poles of the electrical steel coil and permanent magnet between the poles and the stationary part of the rack, recruited from electrical steel plates (Fig. 1). Figure 2 shows that in addition can be applied mechanical aerostatic bearings

                                                                    Figure 1. Electromagnetic scheme

                         Fig.2. Linear inductor (stepping) motor on aerostatic bearings for traction force 200N.                           

                                    .

. The linear inductor (stepper) motors is more critical to the accuracy of manufacture and assembly, and have a low dynamic response. However, with the growth of their size requirements for the accuracy of their production decreases, and in the forefront of their economy by magnets and copper. Therefore, these motors can be produced to great pains to 10,000 N.

            Another advantage of linear stepper motors is their ability to control mode crushing step without feedback from the position and speed. In this case, the positioning accuracy can reach ± 0.1 mm.

Technical characteristics of linear inductor (stepper) motor proposed for production.

                                                                                                                   Table 2                               

                                                                             Figure 3.

 

    A granular joint development and production of this type of engines and equipment on them. For more information and to their proposals to goto  contacts . 

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