Servo of sine wave communication is integrated the newest achievement of servo electromotor, angular velocity and angular displacement sensor, with the communication that uses new-style power electronic parts, special integrated circuit and special control algorithm servo driver matchs, comprise product of unifinication of new-style high-powered Electromechanical. Make original dc servo faces the crisis that fall into disuse, make the mainstream of drive of current world servo and development way. Sine wave communicates servo to use Yu Hang sky, spaceflight, enginery, shipping, electron and nuclear industry extensively to wait for a domain, if drive of control of attitude of self-propelled gun, satellite, radar, airborne towed bird locates,fire of system, chariot accuses to reach firepower system, underwater to destroy thunder robot. Electromotor of servo of sine wave communication is to be in those who the development on the foundation that brushs dc motive rises. Have brush dc motive from 19 centuries 40 time appear since, with its admirable torsion controls character, in quite long period of time, control a domain to hold dominant position in motion all the time. But, the brush of mechanical contact -- the workmanship of commutator is complex with cost taller, be dc servo electromotor all the time cause a weakness. Brush -- the reliability that the structure of commutator also reduced dc servo electromotor, restricted its to apply mediumly in a lot of circumstances. Have the brush that brushs dc motive to replace -- commutator structure, people made long-term exploration. Go up century 20 time, boliger puts forward to be replaced with rectification canal have the mechanical brush that brushs dc motive, arose not to have the basic idea that brushs dc motive from now on. With the tradition have brush dc motive photograph to compare, without the biggest characteristic that brushs dc motive be substituted the mechanical reversing mechanism that comprises by commutator and brush with semiconductor switch component. Because do not have slip report contact, also removed scintilla of the mechanical wear of commutator, inverting and electromagnetism interference. Its rotor uses permanent magnet excitation, do not have excitation loss not only, and maintained have brush the timing character with dc good motive, improved the integral efficiency of electric machinery. 20 centuries since seventies, as the flying development that electric power semiconductor works, a lot of new-style fully control make semiconductor power parts of an apparatus wait to come out in succession like GTR, MOSFET, IGBT, together with is new-style the wide application that if SmCo, NdFeB appears what wait to all brush dc motive to not have in succession,tall magnetism can accumulate magnetically hard material laid solid foundation. Reach its as electric machinery noumenon the rapid development of relevant technology, new-style electric machinery is ceaseless emerge in large numbers. "Without brush dc motive " concept already by original " refer in particular to " the dc intention that has specific electron inverting develops " generally refer to " everything is had have brush dc motive is exterior characteristic and the permanent magnetism dc that does not have brush motive. The weaveform that does not have the weaveform that brushs dc motive system to circle block to turn over electromotive force BEMF by its and electric current can divide it is two kinds big: Square wave is not had brush dc motive and sine wave to not have brush dc motive or sine wave to communicate servo electromotor. Two kinds of permanent magnetism are not had brush electromotor to compare and character, square wave is not had brush dc motive to have control simple, cost is low, detect simple, system realizes device rise to wait for an advantage relatively easily. But square wave is not had brush the existence on dc motive principle inherent blemish, because of the discontinuous sex of the electric current in armature and shift of armature magnetism power existence electromagnetism is pulsatile, and this kind pulsatile noise produces when high speed runs, be in in the main obstacle that low speed is smooth pitching moment drive. Torsion is pulsatile make character of control of electric machinery speed exasperate again, restricted the square wave that makes by its to not have thereby brush dc motive servo to be in the application below the servo drive circumstance of high accuracy, high-powered requirement (be in especially low speed is direct drive circumstance) . Accordingly, control a system to the electric servo drive of average performance, choose square wave to not have brush dc motive and corresponding control means, and use sine wave to communicate servo electromotor to reach its to control a system more to system of drive of servo of high accuracy, high-powered report. In the number that is core with the computer motion controls a system in, sine wave communicates servo electric machinery to serve as executive electromotor, a series of numbers such as the torsion that can accept the computer to give out, rotate speed and position control an amount. Sine wave communicates servo electric machinery to have taller control precision. Because electric machinery Tongan installs positional sensor of the axis and decipher circuit to decide,the control precision of electric machinery of servo of sine wave communication is. To bringing a level the electric machinery of 2500 lines coder, because driver interior used fourfold frequency technology, its pulse equivalent is 360 ° / 10000 ＝ 0. 036 ° are not had to taking brush rotate the control precision of the electric machinery of servo of sine wave communication of transformer, because positional signal is connective sine quantity, resolution of in principle position is decided by the digit of decipher chip. For example decipher chip is 14 R/D, every receive driver 214 ＝ 16384 pulse electric machinery turns circuit, namely its pulse equivalent is 360 ° / 16384 ＝ 0.
02197 seconds. Movement of low speed of electric machinery of servo of sine wave communication is smooth. Three-phase of stator of electric machinery of servo of sine wave communication is circled pass in block, the three-phase sine wave that controls technical generation by vector alternating current. Alternating current and three-phase circle three-phase sine wave the three-phase sine wave in block turns over electromotive force to produce smooth and smooth electromagnetism torsion. Frequency is had in communicating servo to control a system analytic function (FFT) , can detect the resonance point that gives machine, adjust a system to restrain resonance. Anyhow, sine wave communicates servo electric machinery to have broad timing range, turn in 30 minutes a week arrives minutely oscillatory phenomenon won't appear inside the 3000 limits that turn. Electric machinery of servo of sine wave communication is in its are rated rotate speed less than, can realize constant torsion output. Can press advocate any torsion that accuse the computer to ask independent ground outputs rated torsion less than. Constant power output is in above of rated rotate speed. Sine wave communicates servo electric machinery to have stronger overload capacity. Its are the 3 times what torsion is rated torsion biggest, can use at overcoming inertial load to be in to open, the force quadrature of instant of apply the brake. Decrease effectively open, time of apply the brake. Communicate servo electric machinery to be with the MSMA400W below the pine exemple, cong Jing stops to arrive quickly its are rated rotate speed 3000RPM needs a few millisecond only, can control a circumstance with what stop at asking to be opened quickly. Sine wave communicates servo to be digital closed-loop control. The feedback of systematic interior measures: Electric current, rotate speed and position become digital amount to participate in by imitate quantity disperse adjust control. Of the system compositive degree taller, it is better to have flexible, can realize software servo. Temperature change is minor to function influence of the system, systematic repeatability is good. Use contemporary control theory easily, implement more complex control strategy. Realize intelligence to the breakdown that change is diagnosed and be protected easily, the system has higher reliability. Easily with use interface of computer pilot system to realize communication. Series sine wave communicates the large-scale promotion of servo electromotor and drive controller, can break a developed country effectively to be opposite in domain of electric machinery of servo of high accuracy of for military use the block of our country and embargo, can reduce pair of abroad of civil servo electric machinery to import the dependence of the product greatly, drive home the machine tool changes with what spin enginery product gently, have wide market perspective. CNC Milling
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