1、 Speed comparison:

速度方面直线电机具有相当大的优势，直线电机速度达到300m/min，加速度达到10g；滚珠丝杠速度为120m/min，加速度为1.5g。从速度上和加速度的对比上，直线电机具有相当大的优势，而且直线电机在成功解决发热问题后速度还会进一步提高，而“旋转伺服电机+滚珠丝杠”在速度上却受到限制很难再提高较多。

In terms of speed, linear motor has considerable advantages. The speed of linear motor reaches 300m / min and the acceleration reaches 10g; The speed of the ball screw is 120m / min and the acceleration is 1.5g. From the comparison of speed and acceleration, linear motor has considerable advantages, and the speed of linear motor will be further improved after successfully solving the heating problem, while the speed of "rotating servo motor + ball screw" is limited and it is difficult to improve more.

从动态响应上因为运动惯量和间隙以及机构复杂性等问题直线电机也占有优势。

In terms of dynamic response, linear motor also has advantages because of the problems of motion inertia, clearance and mechanism complexity.

速度控制上直线电机因其响应快，调速范围更宽，可以实现启动瞬间达到高转速，高速运行时又能迅速停止。调速范围可达到1：10000。

In speed control, because of its fast response and wider speed regulation range, the linear motor can achieve high speed at the moment of starting, and can stop quickly when running at high speed. The speed regulation range can reach 1:10000.

二、精度比较：

2、 Accuracy comparison:

精度方面直线电机因传动机构简单减少了插补滞后的问题，定位精度、重现精度、精度，通过位置检测反馈控制都会较“旋转伺服电机+滚珠丝杠”高，且容易实现。

In terms of accuracy, the linear motor reduces the problem of interpolation lag due to the simple transmission mechanism. The positioning accuracy, reproduction accuracy and accuracy through position detection feedback control will be higher than "rotating servo motor + ball screw", and it is easy to realize.

直线电机定位精度可达0.1μm。“旋转伺服电机+滚珠丝杠”高达到2~5μm，且要求CNC-伺服电机-无隙连轴器-止推轴承-冷却系统-高精度滚动导轨-螺母座-工作台闭环整个系统的传动部分要轻量化，光栅精度要高。

The positioning accuracy of linear motor can reach 0.1 μ m。“ Rotating servo motor + ball screw "up to 2 ~ 5 μ m. It also requires CNC servo motor gapless coupling thrust bearing cooling system high-precision rolling guide nut seat worktable closed-loop. The transmission part of the whole system should be lightweight and the grating accuracy should be high.

若想达到较高平稳性，“旋转伺服电机+滚珠丝杠”要采取双轴驱动，直线电机是高发热部件，需采取强冷措施，要达到相同目的，直线电机则要付出更大的代价。

If you want to achieve high stability, "rotary servo motor + ball screw" should adopt double shaft drive. Linear motor is a high heating component, and strong cooling measures need to be taken. To achieve the same purpose, linear motor has to pay a greater price.

三、比较：

3、 Price comparison:

方面直线电机的要高出很多，这也是限制直线电机被更广泛应用的原因。

In terms of price, the price of linear motor is much higher, which is also the reason for limiting the wider application of linear motor.

四、能耗比较：

4、 Energy consumption comparison:

直线电机在提供同样转矩时的能耗是“旋转伺服电机+滚珠丝杠”一倍以上，“旋转伺服电机+滚珠丝杠”属于、增力型传动部件，直线电机可靠性受控制系统稳定性影响，对周边的影响很大采取有效隔磁与防护措施，隔断强磁场对滚动导轨的影响和对铁屑磁尘的吸附。

The energy consumption of linear motor when providing the same torque is more than twice that of "rotary servo motor + ball screw". The "rotary servo motor + ball screw" is an energy-saving and force increasing transmission component. The reliability of linear motor is affected by the stability of control system, which has a great impact on the surrounding, and effective magnetic isolation and protection measures are taken, Isolate the influence of strong magnetic field on rolling guide rail and the adsorption of iron dust.