直流減速馬達製造商 - 瀚港企業有限公司

技術資訊

常見問題

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  1. 額定電壓:它是一個減速馬達可正常作動並表現其適當性能的特定電壓。通常電壓供給不應超過額定電壓之10%﹐它對減速馬達轉速、電流、扭矩、及溫度造成影響。過高的操作電壓產生較高的消耗電流造成減速馬達壽命降低。過低的操作電壓產生較低的消耗電流、馬達效率、及輸出扭力。因此對獲得良好的性能﹐維持一適當電壓是重要因素。
  2. 空載轉速:驅動軸無負載下之每分鐘轉速﹐與供給電壓呈線性比例。
  3. 額定轉速:在額定電壓及額定負載狀態下減速馬達轉速。
  4. 空載電流:在額定電壓及無負載條件下之電流值。因內部機械摩擦損失造成,例如:在電刷及換向器部分及軸承與軸間磨擦。
  5. 額定轉矩:為額定電壓下施加負載﹐此負載須在減速馬達可允許操作之扭矩值範圍內應用,減速馬達不建議在負載高於額定扭矩下操作。
  6. 啟動扭矩:扭矩的傳遞由馬達的瞬間啟動及最大電流。啟動扭矩遠高於額定運行或滿負荷扭矩。
  7. 工作週期:為操作及休息時間之匹配關係或在不同負載條件下可重覆作動,直流有刷減速馬達可以在容許溫度下間歇性或持續性週期作動,但大部分微小直流有刷馬達通常使用在短時間間歇性週期運動。
  8. 可允許之最大扭矩
    可運行最大扭矩,須依據齒輪箱減速比,不過扭矩的實際限制須依據齒輪材料、溫昇及一些其他因素,請參考減速馬達之規格書內容。
  9. 齒輪傳送效率:
    它是以百分比表示,傳動效率決定於齒輪與軸襯間之磨擦與潤滑劑等等之抵抗。齒輪比愈大﹐位階數增加時﹐傳動效率以等比率下降。
  10. 徑向負載:徑向負載是在出力軸側邊施加推力或拉力,徑向負載若超出可允許值,將會造成減速馬達出力軸之損壞﹐並引起軸承/軸襯及齒輪過早磨耗。
  11. 軸向負載:軸向負載是在出力軸端施以往內或往外之力量,軸向負載若超出可允許值﹐將會引起軸承/軸襯及齒輪之過早磨耗。

The relationship between torque (T), speed (N), current (I), efficiency (E), and output power (P), as below figures shown, represents the characteristics of a Hennkwell micro DC gear motor. Figure-1 shows how the loaded torque on the gear motor is in proportion and is directly related to the output speed and current. Figure-2 shows how the no-load speed and starting torque also change proportionally to a different supply voltage. The output speed at a given voltage is parallel to those at other voltage.

As the load on the gear motor increases, speed will decrease accordingly. Additionally, the current (I) is an inverse relationship to torque. The peak of output power (P) and efficiency (E) exist at different torque points, as indicated in figure-1. Output power presents a curve by torque while efficiency (E) decreases straight down beyond the peak normally. Maximum output (Pmax) is at half the starting torque (Ts) point and maximum efficiency exists at a much lower point of torque. A gear motor's basic rating point is lower than its maximum efficiency point. Load torque can be determined by measuring the current drawn when the gear motor is installed in a machine where actual load value is known.

Moreover, the actual operating load torque must be selected lower by a few times than the stall torque. The purpose is to prolong the motor’s life and to bring out the most optimal performance. Besides the full load torque has to operate within the maximum allowable torque (motor stall torque x gear ratio x efficiency x 20-25%) limit, although the gear motor could produce an over torque.

The maximum efficiency is generally much lower than the maximum stalled torque, because although the motor can operate at a higher torque than the maximum efficiency torque, it can also shorten the motor’s life due to high current generated. Thus, selecting a motor with a torque that is several times higher than the actual operating torque is strongly recommended.


Gear Motor Characteristics
Gear Motor Characteristics
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