1、重慶升降機的操作非常頻繁，并具備較高的承載能力和速度，電動機的正方向切換、起動與制動都顯得尤為頻繁了，電動機始終處于負荷的狀態下，因此就要求制動平穩。
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、升降機電動機的工作狀態是可逆的，運行機構基本屬于阻性負載，主要承受摩擦阻力矩，電動機的工作狀態基本是電動狀態。屬于位能負載，主要承受位能負荷，要求電動機具有不對稱性工作狀態，提升或輕鉤下降時為電動狀態，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速范圍寬、調速性能優良，以達到準確定位、改善勞動強度、保證安全、提高生產率。
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，要求電氣傳動系統的可靠性高、保護裝置完善、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.