1、 Speed comparison:

速度方面直線電機具有相當大的優勢，直線電機速度達到300m/min，加速度達到10g；滾珠絲杠速度為120m/min，加速度為1.5g。從速度上和加速度的對比上，直線電機具有相當大的優勢，而且直線電機在成功解決發熱問題后速度還會進一步提高，而“旋轉伺服電機+滾珠絲杠”在速度上卻受到限制很難再提高較多。

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.

從動態響應上因為運動慣量和間隙以及機構復雜性等問題直線電機也占有優勢。

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

速度控制上直線電機因其響應快，調速范圍更寬，可以實現啟動瞬間達到高轉速，高速運行時又能迅速停止。調速范圍可達到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、精度比較：

2、 Accuracy comparison:

精度方面直線電機因傳動機構簡單減少了插補滯后的問題，定位精度、重現精度、精度，通過位置檢測反饋控制都會較“旋轉伺服電機+滾珠絲杠”高，且容易實現。

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.

直線電機定位精度可達0.1μm。“旋轉伺服電機+滾珠絲杠”高達到2~5μm，且要求CNC-伺服電機-無隙連軸器-止推軸承-冷卻系統-高精度滾動導軌-螺母座-工作臺閉環整個系統的傳動部分要輕量化，光柵精度要高。

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.

若想達到較高平穩性，“旋轉伺服電機+滾珠絲杠”要采取雙軸驅動，直線電機是高發熱部件，需采取強冷措施，要達到相同目的，直線電機則要付出更大的代價。

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、比較：

3、 Price comparison:

方面直線電機的要高出很多，這也是限制直線電機被更廣泛應用的原因。

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、能耗比較：

4、 Energy consumption comparison:

直線電機在提供同樣轉矩時的能耗是“旋轉伺服電機+滾珠絲杠”一倍以上，“旋轉伺服電機+滾珠絲杠”屬于、增力型傳動部件，直線電機可靠性受控制系統穩定性影響，對周邊的影響很大采取有效隔磁與防護措施，隔斷強磁場對滾動導軌的影響和對鐵屑磁塵的吸附。

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.