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Current position£ºHome > News The advantages and disadvantages of linear motors

The advantages and disadvantages of linear motors

time£º2017/6/29  click£º26387

      A linear motor is a motor that converts electrical energy directly into linear motion without passing through any intermediate switching mechanism. The superiority of linear motor drives has been recognized by more and more people. So what are the advantages and disadvantages of linear motors? The text will detail the advantages and disadvantages of the linear motor.
      Advantages of Linear Motors:
      1. No mechanical contact, the transmission force is generated in the air gap, in addition to the linear motor rail without any other friction
      2. The structure is simple, small size, by using fewer parts to achieve our linear drive, and this is only a moving part

      3. The itinerary of the operation is theoretically unrestricted, and its performance will not be affected by the size of its itinerary
      4. Its operation can provide a wide range of speed operating range, which covers from a few micrometers per second to several meters, especially in the high speed state is one of its outstanding advantages
      5. Acceleration, larger up to 10g     

      6. Smooth movement, this is because in addition to supporting the role of linear guide or air bearing, there is no other mechanical connection or conversion device
      7. Accuracy and repeatability is high, because the intermediate part of the accuracy is eliminated, the accuracy of the system depends on the position detection element, the appropriate feedback device can reach sub-micron level
      8. Maintenance is simple, because the parts less, no mechanical contact when moving, thus greatly reducing the wear and tear parts, only little or no maintenance, longer life. Linear motor and "rotating motor, ball screw" transmission performance comparison table performance rotary motor + ball screw linear motor.
      Disadvantages of Linear Motors:
      1. Linear motor power consumption, especially in the high load, high acceleration of the movement, the machine instantaneous current on the workshop power supply system to bring heavy load;
      2. is high vibration, linear motor dynamic stiffness is very low, can not play the role of buffer damping, in high-speed movement easily lead to other parts of the machine resonance;
      3. is a large amount of heat, fixed at the bottom of the table motor motor is a high fever parts, the installation location is not conducive to natural heat, the machine temperature control caused great challenges;
      4. Is not self-locking, in order to ensure safe operation, linear motor-driven movement axis, especially the vertical movement axis, must be equipped with additional locking mechanism, increasing the complexity of the machine.
      With the rapid development of high-speed processing technology, the transmission and control system requirements are getting higher and higher, so that the linear motor drive technology research efforts gradually increased. Now many of the shortcomings of linear motors have been overcome, the linear motor power performance is more excellent. Linear drive technology research is both the trend of higher and faster development of technology, but also better meet the needs of the market, bring greater economic benefits, become the inevitable trend of future development.
      Kunshan Tongmao Electronics Co., Ltd. Ten years focused on linear motor production and research and development, the company produced linear motor using advanced technology standards in Europe and America, technology and testing methods, its quality and dynamic performance reached the international advanced level, domestic and foreign customers have been unanimously approved.