Appendix B How to Select AC Motor Drive

Appendix B How to Select AC Motor Drive DD Series

Appendix B

How to Select AC Motor Drive

The choice of the right AC motor drive for the application is very important and has great influence on its lifetime. If the capacity of AC motor drive is too large, it cannot offer complete protection to the motor and motor maybe damaged. If the capacity of AC motor drive is too small, it cannot offer the required performance and the AC motor drive maybe damaged due to overloading.

But by simply selecting the AC motor drive of the same capacity as the motor, user application requirements cannot be met completely. Therefore, a designer should consider all the conditions, including load type, load speed, load characteristic, operation method, rated output, rated speed, power and the change of load capacity. The following table lists the factors you need to consider, depending on your requirements.

		Related Specification
	Item	Speed and	Time	Overload	Starting
	Item	torque	Time	Overload	Starting
		torque	ratings	capacity	torque
		characteristics	ratings	capacity	torque
	Friction load and weight load
Load type	Liquid (viscous) load	●			●
Load type	Inertia load	●			●
	Inertia load
	Load with power transmission
Load speed	Constant torque
Load speed	Constant output
and torque	Constant output	●	●
and torque	Decreasing torque	●	●
characteristics	Decreasing torque
characteristics	Decreasing output
	Constant load
Load	Shock load
Load	Repetitive load	●	●	●	●
characteristics	Repetitive load	●	●	●	●
characteristics	High starting torque
	Low starting torque
Operation	Continuous operation,
Operation	Short-time operation		●	●
Method	Long-time operation at medium/low		●	●
Method	Long-time operation at medium/low
	speeds
	Maximum output current
Rated Output	(instantaneous)	●		●
Rated Output	Constant output current	●		●
	Constant output current
	(continuous)
Rated Speed	Maximum frequency,	●
Rated Speed	Base frequency	●
	Base frequency
	Power supply transformer capacity
	Percentage impedance
Input Power	Voltage fluctuations and unbalance			●	●
Input Power	Number of phases, single phase			●	●
	Number of phases, single phase
	protection
	Frequency
Load Capacity	Mechanical friction, losses in wiring			●	●
Changes	Duty cycle modification		●

B-1

VFD-D D specifications

The 3Com VFD-D D is an advanced networking solution designed to meet the demands of modern communication and connectivity. As part of 3Com's extensive portfolio of networking products, this device stands out due to its robust features, innovative technologies, and characteristics that cater to various enterprise environments.

One of the main features of the 3Com VFD-D D is its high-speed data processing capability. Operating at speeds that comfortably support high-bandwidth applications, the device is equipped to handle a multitude of simultaneous connections without compromising performance. This makes it an ideal choice for businesses where consistent, fast access to data is critical.

In terms of connectivity options, the VFD-D D supports a variety of protocols, allowing it to seamlessly integrate with existing infrastructure. Whether through Ethernet, Fiber Channel, or wireless technologies, the device offers versatility in connecting diverse network configurations. This adaptability ensures that organizations can optimize their network setups according to their specific requirements.

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Moreover, the VFD-D D is designed with scalability in mind. Its modular architecture allows businesses to expand their network capabilities as needed, ensuring that the device can grow alongside their evolving requirements. This flexibility helps organizations manage costs effectively while preparing for future technological advancements.

Another characteristic that sets the 3Com VFD-D D apart is its user-friendly management interface. Administration tasks can be performed quickly and intuitively, reducing the burden on IT staff while enabling efficient network monitoring and troubleshooting. With real-time analytics and reporting capabilities, organizations can gain valuable insights into their network's performance.

Overall, the 3Com VFD-D D combines speed, security, and scalability in a single device, making it a powerful addition to any enterprise network. Its advanced features and technologies are tailored to support the dynamic needs of modern businesses, ensuring reliable performance and robust connectivity in an increasingly interconnected world.

3Com VFD-D D manual Appendix B How to Select AC Motor Drive

Models: VFD-D D

Appendix B

How to Select AC Motor Drive

Related Specification

VFD-D D specifications