Chapter 6 Control Modes of OperationASDA-B Series

If the load inertia is N × motor inertia, the regenerative power will be (N+1) × E0 when servo motor brakes from 3000rpm to 0. Then, the regenerative resistor can dissipate: (N+1) × E0 - Ec (joule). If the time of repeat operation cycle is T sec, then the regenerative power = 2 × ((N+1) × E0 - Ec) / T. The calculating procedure is as follows:

Step

Procedure

Equation and Setting Method

1

Set the capacity of regenerative

Change the value of P1-53 to maximum

resistor to the maximum

 

 

2

Set the operation cycle T

Input by the users

3

Set motor speed wr

Input by the users or read via P0-02 Drive State Display

4

Set load/motor inertia ratio N

Input by the users or read via P0-02 Drive State Display

5

Calculate the max. regenerative

Eo= J * wr2/182

 

power Eo

 

6

Set the regenerative power Ec that

Refer to the table 6.I above

 

can be absorbed

 

7

Calculate the required regenerative

2×(N+1) ×Eo－Ec）/ T

 

power capacity

 

Table 6.J

For example:

If we use 750W servo drive, the time of repeat operation cycle is T = 0.4 sec, max. motor speed is 3000rpm, the load inertia = 4 × motor inertia, then the necessary the power of regenerative resistor = 2

×( (4+1) × 5.36 – 11.07) / 0.75 = 41.9W. If the calculation result is smaller than regenerative power, we recommend the users to use the built-in 60W regenerative resistor. Usually the built-in regenerative resistor provided by ASDA-B series can meet the requirement of general application when the external load inertia is not excessive.

The users can see when the capacity of regenerative resistor is too small, the accumulated power will be larger and the temperature will also increase. The fault, ALE05 may occur if the temperature is over high. The figure on next page shows the actual operation of regenerative resistor.

(2) With Load

When there is an external load torque, servo motor is in reverse rotation when external load greater than motor torque. Servo motor is usually in forward rotation and the motor torque output direction is the same as the rotation direction. However, there is still some special condition. If the motor output torque is in the reverse direction of rotation, the servo motor is also in the reverse direction of rotation. The external power is input into the servo drive through servo motor. The figure on next page is an example. The users can see the motor is in forward rotation at constant speed when a sudden external load torque change and great power is transmitted to regenerative resistor rapidly.

6-34

Revision January, 2009

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Page 149
Image 149
Delta Electronics ASDA-B Series manual With Load
Page 148 Page 150

ASDA-B Series specifications

Delta Electronics, a global leader in power and thermal management solutions, has made significant strides in the automation and control sectors with its ASDA-B Series of servo drives. This series is engineered for precision motion control applications and is ideal for various industries, including manufacturing, robotics, and packaging.

One of the standout features of the ASDA-B Series is its advanced control algorithms. The series utilizes a high-performance digital signal processor (DSP) that enables precise control of servo motors, resulting in exceptional responsiveness and stability even at high speeds. This technology is particularly beneficial in applications requiring quick acceleration and deceleration, ensuring optimal performance in dynamic environments.

The ASDA-B Series offers a wide range of power ratings, making it versatile enough to cater to different motor sizes and application requirements. It supports various feedback devices, including encoders and resolver systems, enhancing its adaptability and accuracy in diverse operational contexts. The series also features a user-friendly interface, allowing for easy programming and setup, thus minimizing downtime and maximizing productivity.

One of the notable characteristics of the ASDA-B Series is its compact design. The small form factor not only saves valuable space in control cabinets but also simplifies installation and maintenance processes. Additionally, the series is built to withstand tough industrial environments, featuring robust construction that enhances durability and reliability.

Another key technology integrated into the ASDA-B Series is its advanced communication capabilities. The drives support multiple industrial communication protocols, including Ethernet/IP, CANopen, and Modbus, allowing for seamless integration into existing network systems. This connectivity is crucial for applications that require real-time data exchange and remote monitoring.

To ensure energy efficiency, Delta Electronics has incorporated innovative energy-saving technologies in the ASDA-B Series. These technologies optimize power consumption during operation, resulting in lower energy costs and reduced carbon footprint. Moreover, the thermal management features ensure that the drives operate within safe temperature ranges, enhancing their longevity and performance reliability.

In conclusion, Delta Electronics' ASDA-B Series servo drives represent a powerful solution for modern automation needs. With their advanced control algorithms, compact design, versatile communication options, and energy-saving technologies, these drives cater to a wide array of industrial applications, reinforcing Delta's commitment to innovation and efficiency in the automation landscape.
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