CE Certificated Variable Speed Drive VSD 380V 3 Phase 200kw For Water Pump Industry

Benefit of a Variable Speed Drive

Tighter Process Control with Variable Speed Drives

No other AC motor control method compares to variable speed drives when it comes to accurate process control. Full-voltage (across the line) starters can only run the motor at full speed, and soft starts and reduced voltage soft starters can only gradually ramp the motor up to full speed, and back down to shutoff. Variable speed drives, on the other hand, can be programmed to run the motor at a precise speed, to stop at a precise position, or to apply a specific amount of torque.

In fact, modern AC variable speed drives are very close to DC drives in terms of fast torque response and speed accuracy. AC motors, however, are much more reliable and affordable than DC motors, making them far more prevalent.

Most drives used in the field utilize Volts/Hertz type control, which means they provide open-loop operation. These drives are unable to retrieve feedback from the process, but are sufficient for the majority of Variable Speed Drive applications. Many open-loop variable speed drives do offer slip compensation though, which enables the drive to measure its output current and estimate the difference in actual speed and the setpoint (the programmed input value). The drive will then automatically adjust itself towards the setpoint based on this estimation.

Most variable torque drives have PID capability for fan and pump applications, which allows the drive to hold the setpoint based on actual feedback from the process, rather than relying on an estimation. A transducer or transmitter is used to detect process variables such as pressure levels, liquid flow rate, air flow rate, or liquid level. Then the signal is sent to a PLC, which communicates the feedback from the process to the drive. The variable Speed Drive uses this continual feedback to adjust itself to hold the setpoint.

High levels of accuracy for other applications can also be achieved through drives that offer closed-loop operation. Closed-loop operation can be accomplished with either a field-oriented vector drive, or a sensorless vector drive. The field-oriented vector drive obtains process feedback from an encoder, which measures and transmits to the drive the speed and/or rate of the process, such as a conveyor, machine tool, or extruder. The drive then adjusts itself accordingly to sustain the programmed speed, rate, torque, and/or position.

Company Profile:

• Zhejiang Chifon electric Co., Ltd has completely independent intellectual property rights and several national patent innovation technologies. It has always adhered to technological innovation, with the goal of continuously meeting customer s needs, and has always adopted the design philosophy of high quality, high precision, high efficiency and low maintenance. It has gradually become a domestic and foreign supplier of electrical transmission equipment that is worth relying on.
• The company′s products include general frequency conversion drives, special industrial application planes, integrated solutions and new energy products. The company′s research and development team gathers numerous professional and technical personnel at home and abroad, and continuously innovates on the basis of mastering high-performance vector frequency conversion technology and servo technology platforms to realize technological breakthroughs in various related fields. This enables Chifon to provide customers with the most suitable products and solutions to meet their requirements in terms of high efficiency, energy conservation, environmental protection and overall cost control.

• Zhejiang Chifon electric Co., Ltd., is a high-tech enterprise specializing in research, development, manufacture and sales of electric drive, industrial control and motor energy saving technology products.
  
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FPR500A Product specifications