在速度方面直線電機(jī)具有相當(dāng)大的優(yōu)勢。直線電機(jī)的速度為300m/min；加速度為10g。滾珠絲杠的速度為120 m/min；加速度為1.5g。從速度和加速度的對比上直線電機(jī)具有相當(dāng)大的優(yōu)勢，而且直線電機(jī)在成功解決發(fā)熱問題后速度還會(huì)進(jìn)一步提高，而“旋轉(zhuǎn)伺服電機(jī)+滾珠絲杠”在速度上卻受到了較多限制很難再有所提高。從動(dòng)態(tài)響應(yīng)來講直線電機(jī)因運(yùn)動(dòng)慣量和間隙以及機(jī)構(gòu)復(fù)雜性等問題而占有優(yōu)勢。

Linear motor has considerable advantages in speed. The speed of linear motor is 300m/min; The acceleration is 10g. The speed of ball screw is 120 m/min; 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 "rotary servo motor+ball screw" is subject to more restrictions and is difficult to improve. In terms of the dynamic response, linear motor has advantages because of the inertia, clearance and complexity of the mechanism.

在速度控制方面，直線電機(jī)響應(yīng)更快，調(diào)速范圍更寬，達(dá)1:10000，可以在啟動(dòng)瞬間達(dá)到高轉(zhuǎn)速，而且在高速運(yùn)行時(shí)能迅速停止。

In terms of speed control, the linear motor has faster response, wider speed range, up to 1:10000, can reach high speed at the moment of starting, and can quickly stop at high speed.

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2、精度

2. Precision

精度方面直線電機(jī)因傳動(dòng)機(jī)構(gòu)簡單減少了插補(bǔ)滯后的問題，定位精度、重現(xiàn)精度和精度通過位置檢測反饋控制都會(huì)較“旋轉(zhuǎn)伺服電機(jī)+滾珠絲杠”高，且容易實(shí)現(xiàn)。

In terms of accuracy, the linear motor reduces the problem of interpolation lag due to its simple transmission mechanism. The positioning accuracy, reproduction accuracy and accuracy are all higher than "rotary servo motor+ball screw" through position detection feedback control, and are easy to achieve.

直線電機(jī)定位精度可達(dá)0.1μm。“旋轉(zhuǎn)伺服電機(jī)+滾珠絲杠”的精度高為2~5μm。

The positioning accuracy of linear motor can reach 0.1 μ m。 The accuracy of "rotary servo motor+ball screw" is 2-5 μ m。

3、能耗

3. Energy consumption

“旋轉(zhuǎn)伺服電機(jī)+滾珠絲杠”屬于增力型傳動(dòng)部件。在提供相同轉(zhuǎn)矩時(shí)，直線電機(jī)消耗的能源約比“旋轉(zhuǎn)伺服電機(jī)+滾珠絲杠”多一倍以上。而且直線電機(jī)的可靠性受控制系統(tǒng)穩(wěn)定性的影響，且對周邊環(huán)境有較大影響，因此一定要采取的隔磁和防護(hù)措施以隔斷磁場對滾動(dòng)導(dǎo)軌的影響和對銑屑磁塵的吸附。

"Rotary servo motor+ball screw" belongs to energy-saving and force increasing transmission parts. When providing the same torque, the energy consumption of the linear motor is more than twice that of the "rotary servo motor+ball screw". Moreover, the reliability of the linear motor is affected by the stability of the control system and has a great impact on the surrounding environment. Therefore, magnetic isolation and protection measures must be taken to isolate the impact of magnetic field on the rolling guide and the absorption of magnetic dust from milling chips.

4、噪音

4. Noise

直線電機(jī)噪音小，因?yàn)橹本€電機(jī)不存在離心力的約束，運(yùn)動(dòng)時(shí)無機(jī)械接觸，也就無摩擦和噪聲。傳動(dòng)零部件沒有磨損，可大大減小機(jī)械損耗，避免拖纜、鋼索、齒輪與皮帶輪等所造成的噪聲，從而提高整體效率；

The linear motor has low noise, because the linear motor does not have the constraint of centrifugal force, and there is no mechanical contact when moving, so there is no friction and noise. The transmission parts are not worn, which can greatly reduce the mechanical loss and avoid the noise caused by towing cables, steel cables, gears and pulleys, so as to improve the overall efficiency;

滾珠絲杠經(jīng)過長時(shí)間的使用，滾珠表面出現(xiàn)了剝落，或者是切削受力面的滾珠絲桿軸出現(xiàn)問題，間接影響了滾珠的運(yùn)行軌道，造成了螺母和軸之間相互的摩擦造成了振動(dòng)，以致發(fā)出的噪音過大；

After the ball screw has been used for a long time, the surface of the ball has peeled off, or the ball screw shaft on the cutting force surface has a problem, which indirectly affects the running track of the ball, causing the friction between the nut and the shaft to cause vibration, resulting in excessive noise;

5、行程

5. Travel

直線電機(jī)理論上可以做到無限行程；

Linear motor can achieve unlimited travel theoretically;

滾珠絲桿的螺母運(yùn)轉(zhuǎn)到有效行程之后，依然是可以進(jìn)行適當(dāng)?shù)男D(zhuǎn) ，但是正常情況下，是不能旋轉(zhuǎn)過度的，不然就會(huì)傷害到滾珠絲桿，導(dǎo)致滾珠顆粒和螺母的大量脫落，因而，一般是不建議運(yùn)轉(zhuǎn)的時(shí)候過量前進(jìn)的。

After the nut of the ball screw runs to the effective stroke, it can still rotate properly, but under normal circumstances, it cannot rotate excessively, otherwise it will damage the ball screw, causing a large number of ball particles and nuts to fall off. Therefore, it is generally not recommended to move forward excessively when running.

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