Sự khác biệt giữa CD vận điện và MD là gì?

The following will analyze the differences between CD electric hoists and MD electric hoists from five aspects.

• 1. Tốc độ chạy:

  • CD type electric hoist: It is a single-speed Hoạt vận động điện. It only operates at one speed (usually the regular raise/lower speed).

  • MD type electric hoist: It is a two-speed electric hoist. It offers two operating speeds:

    • Normal speed (main speed): The same normal lifting/lowering speed as CD type, used for general handling.

    • Slow speed (micro speed): A slower, more precise lifting/lowering speed, used when precise positioning, fine operation or close to the load is required.

• 2. Working mode/operation:

  • CD type: The operation is relatively simple, usually only one lifting/lowering gear (tốc độ đơn).

  • MD type: More flexible operation. By operating the handle or button, the operator can switch between normal speed and slow speed to adapt to different operating needs.

• 3. Internal structure (động cơ):

  • Type CD: Usually uses a single-speed conical rotor brake motor.

  • MD type: Usually a double-winding (hoặc hai tốc độ) conical rotor brake motor is used, or the two-speed function is achieved through a mechanical transmission mechanism (such as a planetary gear reducer). There are two independent sets of coils inside the double-winding motor, corresponding to normal speed and slow speed respectively.

• 4. Kịch bản ứng dụng:

  • Type CD: Suitable for general hoisting, loading and unloading operations that do not require high positioning accuracy, relatively stable loads, and do not require precise operations. Ví dụ: loading and unloading goods in the warehouse, simple lifting of equipment in the workshop, vân vân. The price/performance ratio is usually better.

  • MD type: Suitable for occasions that require precise positioning, fine adjustment, safe access to the load or the operation of precise, fragile, and valuable items. Ví dụ:

    • Installation and positioning of machine tool workpieces.

    • Mold clamping and alignment.

    • Precision adjustment during equipment maintenance.

    • Install glass, precision instruments and other fragile items.

    • In situations where space is limited or smooth start/stop is required. Stronger functions and wider applicability.

• 5. Price:

  • Since the MD type has a more complex structure (two-speed motor or variable speed mechanism) and more functions, its price is usually higher than that of the CD-type electric hoist of the same specification.

The difference between CD and MD electric hoists

đặc trưng	CD type electric hoist	MD electric hoist
Tốc độ	Tốc độ đơn (normal speed only)	Dual speed (tốc độ bình thường + slow/micro speed)
Operating mode	Simple (single speed operation)	Flexible (can switch between normal speed and slow speed)
Core motor	Single speed conical rotor brake motor	Double-winding conical rotor brake motor or single-speed motor + mechanical transmission mechanism
Main advantages	Simple structure, low price, relatively easy to maintain	Định vị chính xác, fine operation, higher safety (slow approach)
Typical applications	General lifting, loading and unloading, and occasions where precision is not required	Precision installation, mold clamping, bảo trì thiết bị, fragile product lifting, narrow space operations
Price	Thấp hơn	Higher

Ghi chú:

If you only need basic lifting and lowering functions, do not have high requirements for positioning accuracy, and are pursuing economy, choose the CD type.

If you often need to perform precise positioning, fine-tuning, or operate delicate and fragile items, and need a safer slow-speed approach function, then the MD type is a more suitable choice, although the price will be higher.

When choosing, be sure to make a decision based on your specific working conditions, accuracy requirements, budget, and needs for operational safety and precision.