1,、重慶升降機(jī)的操作非常頻繁,，并具備較高的承載能力和速度，電動機(jī)的正方向切換,、起動與制動都顯得尤為頻繁了,，電動機(jī)始終處于負(fù)荷的狀態(tài)下，因此就要求制動平穩(wěn),。
Zhejiang freight operation under very frequently, and have a higher carrying capacity and speed, the positive direction of the motor switch, starting and braking are particularly frequent, the motor is always in the load state, and therefore requires smooth braking.

2,、升降機(jī)電動機(jī)的工作狀態(tài)是可逆的，運(yùn)行機(jī)構(gòu)基本屬于阻性負(fù)載,，主要承受摩擦阻力矩,，電動機(jī)的工作狀態(tài)基本是電動狀態(tài)。屬于位能負(fù)載,，主要承受位能負(fù)荷,，要求電動機(jī)具有不對稱性工作狀態(tài)，提升或輕鉤下降時為電動狀態(tài),，重載下降時為制動,。大型化、自動化和高性能化要求其傳動具有調(diào)速范圍寬,、調(diào)速性能優(yōu)良,，以達(dá)到準(zhǔn)確定位、改善勞動強(qiáng)度,、保證安全,、提高生產(chǎn)率。
Zhejiang freight motor operating state is reversible, operating agencies are basically resistive load, mainly bear friction torque, the motor is an electric state basic working conditions. Zhejiang Lifts belong potential energy load,mainly bear potential energy load, the motor asymmetry working conditions, promotion or light drops electric hook state, down to brake when overloaded. Zhejiang large freight elevators, automation and high performance required to drive with a wide speed range, excellent speed performance, in order to achieve accurate positioning, improve labor intensity, ensure safety and improve productivity.

3,、貨梯工作任務(wù)繁重,，要承受瞬時過載、沖擊和振動,，因此要具有足夠的過載能力,，要求電氣傳動系統(tǒng)的可靠性高,、保護(hù)裝置完善、操作及維修方便,，滿足裝卸要求,。
Zhejiang Lifts heavy workload, to withstand transient overload, shock and vibration, and therefore have sufficient overload, Zhejiang Lifts demanding electrical transmission system reliability, perfect protection device, easy operation and maintenance, to meet the loading requirements.