Delta AFE2000 User Manual download pdf (Page 2)

Product Application

Industrial Automation BU, Delta Electronics, Inc.

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With solid experience and advanced technology, Delta’s IABU offers efficient and reliable solutions and service — we are your most

trustworthy partner.

safety protection and additional features such as large load inertia and 4-quadrant operation. The suggested AC

motor drive and the active front-end unit model for the bridge crane are:

 VFD  VFD110C23A

 AFE  AFE075A23A + CHOKE: 2.1mH

Application Case

System Solution

For bridge cranes, the Delta C2000 series AC motor drive has taken overload problems and long-term system

stability issues as target factors and offers excellent features such as:

1. Full vector control. Supports starting torque up to 150% rated torque at a low frequency of 1Hz in steady motion.

2. Optional braking unit is available to perform 4-quadrant operation

3. Constant torque at full speed range

4. With AFE2000, regenerative energy is converted by AFE2000 into reusable energy (clean power) and fed back to

the mains.

System Features

 SVC control

The Delta C2000 provides sensorless vector control (SVC) to perform a nearly close-loop control function which

saves from purchasing an encoder and lowers maintenance cost. In addition, it overcomes activation difficulties, and

is capable of initiating a start-up under full load and short-term over-load conditions.

 Braking process control

Prevention of sudden drops and jerky movements is an important factor in overall bridge crane system design.

The coordination between the AC motor drive and the mechanical control should be rigid to prevent sudden drops and

jerking, especially when lifting or lowering a heavy load and when stopping a heavy load in mid-air. The Delta C2000

series offers a special set of parameters and multiple output commands to promptly solve the problem.

 Overload capacity

Normal load: rated output current 120%/min; Heavy load: rated output current 150%/min. This offers sufficient

start-up torque and maintains the DC Bus voltage at 730VDC when torque decreases and it will not trigger OU alarm.

The test report reveals the system allows the bridge crane to operate long-term

 Soft-start, soft-stop, wide speed range and precise positioning.

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Delta AFE2000 User Manual Page 2