Click the link to download the Lenze servo drive 9300 manual. In addition to the Lenze servo drive 9300 manual, other documentation for Lenze servo drives can also be downloaded from the Precision Electric Literature Page.
Variable speed drives are also known as variable frequency drives, VFD’s, adjustable speed drives, and inverters. Variable speed drives are solid state motor control systems used mainly for industrial manufacturing. Variable speed drives are designed to control the speed of an electric motor. Variable speed drives can reduce energy costs up to 50% by speed reduction on applications where the full speed (RPM) of the electric motor is not required.
The energy saved on a utility bill from using a variable speed drive is often significant enough to pay for the variable speed drive within a couple of months from installation date. Variable speed drives are commonly used on pump, fan, and air compressor applications, and are often used in manufacturing facilities to increase or decrease the start up time on alternating current (AC) electric motors.
Increasing and/or decreasing the start up time on an AC current electric motor via a variable speed drive can add years to the motor’s overall lifespan. Using a variable speed drive can also improve efficiency on production demands. Variable speed drives provide the ability to control the frequency of starting and stopping an AC electric motor. This ability provides a means by which an AC electric motor is only operating when needed. AC electric motors have a longer lifespan if they are not continuously operating when they do not need to be.
The most common type of variable speed drive is known as a V/Hz (volts per hertz), and are applied to applications such as fans, pumps, air compressors, and other related applications where high starting torque is not required. V/Hz variable speed drive applications typically do not require full torque when the AC motor is operating at less than the base speed (RPM) of the electric motor. V/Hz variable speed drives are the most inexpensive type of variable speed drive. V/Hz variable speed drives do not provide full motor torque at low RPM.
Open-Loop vector drives are also known as s”ensorless vector” variable speed drives. Open loop vector drives adapted the name “sensorless vector” because they do not use an external encoder for speed feedback to the motor. Open loop vector drives are used in applications where high starting torque and full torque at low speed (RPM) is required. Open-Loop vector drives operating a motor a zero RPM should not be used on crane or hoist applications. Most open-loop vector drives are used on CNC machines, mixers, mills, lathes, and other applications where high starting torque or full torque at low RPM is needed. Open loop vector drives are usually more expensive than a V/Hz variable speed drives.
Closed-Loop vector drives are used in applications where precise speed control (0.01%) is needed, or in applications where extensive programming is needed. Closed-Loop vector drives use an encoder on the motor to provide constant shaft position indication to the drive’s microprocessor. The encoder feedback allows the drive microprocessor to constantly control torque no matter how many RPM the motor is operating at. Closed-Loop vector drives are used to provide the motor to operate at full torque even at zero RPM. Closed-Loop vector drives are commonly used on hoist and crane applications because crane and hoist motors must produce full torque prior to it’s brake being released, or the load will drop and it will not be able to stop.
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A human-machine interface (known as an HMI) is an industrial electronics product that’s used to interact the operation and control between humans and machines. An HMI provides feedback from the industrial machine to the end user which helps the user make changes so that the machine is more effective in production. An HMI can also provide a way to control, manage, monitor and visually operation processes during production. HMI’s are used in all sorts of production applications across the world; but are extremely popular in heavy machinery, robotics, process controls, ergonomics, PLC and other related applications.
An industrial HMI system’s processing power determines it’s usability and its ability to render complex screens. An HMI’s fast response time to user input and flexibility to handle multiple levels of operator interactions is also determined upon the processing power within the HMI. HMI’s require dynamically changing graphics that require a high-performance solution that can achieve the 60 frame per second refresh rate that’s required at the right resolution. HMI’s also have to support multiple connectivity and communications protocols to communicate between the operator and various machines and control systems.
HMI’s range from simple displays to high resolution LCD panels and can be mounted on the machine, portable handheld devices, and also in centralized control cabinets. HMI’s are used in machine and process control to connect sensors, actuators and machines on the plant floor to I/O control and PLC systems. An operator control cabinet allows an HMI operator to interact with the machine in a visual way. With controls and read-outs graphically displayed on the screen, the HMI user can use either external buttons or a touch screen to control the industrial machine it’s connected to.
sources:
http://www.pcmag.com/encyclopedia/term/44300/hmi
https://en.wikipedia.org/wiki/User_interface
