N700E INSTRUCTION MANUAL
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1. Hyundai N700E Series VFD
Hyundai N700E Series VFD with high durability, exceptional speed control and torque response provides
overall superior vector performance. The N700E’s compact size and Sensorless Vector control
technology provide perfectly optimized performance for industrial / commercial equipment. Certificates of
international standards (CE, UL/cUL) of N700E series make its application ready for global business.
1.1 Benefits of a VFD
The speed of induction motor is limited by the operating frequency and the number of poles.
Motor RPM =
120 * Frequency
Number Poles
The fundamental benefit of the VFD is to control the motor speed by varying the frequency. The VFD
offers more functions to benefit the total system such as ease of use or energy savings, which is
summarized below.
Motor speed is a function of the number of motor poles and the frequency.
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At 60 Hz a motor runs at 3600, 1800, 1200, 900 RPM for 2 poles, 4 poles, 6 poles, and 8
pole respectively. At 50 Hz - 3000, 1500, 1000, 750 RPM
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A VFD can control the frequency to operate the motor over a range of speeds to optimize
an application.
Maintain a constant motor speed regardless of load
Control forward/reverse operation
Start/Stop and restart control
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When power loss occurs on an unmanned application, the VFD turns off. With
programming, a user can configure the VFD to restart when power is back on.
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Or program to stop VFD for conditions such as overvoltage, overcurrent, etc.
Ramp to start or Ramp to stop
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By controlling ramp slopes of start/stop, mechanical stress can be minimized.
Reduce energy consumption by operating output at optimum frequency for the application.
Protects VFD and motor by limiting current, speed, and temperature by generating trip signals
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Current trip
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Voltage trip
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Over temperature trip etc.