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The following frequencies are harmonics of a 60- or 50-Hz commercial power supply.
Second harmonic:
120 (100) Hz
Third harmonic:
180 (150) Hz
Second harmonic (120 Hz)
Basic frequency (60 Hz)
Third harmonic (180 Hz)
Problems Caused by Harmonics Generation
The waveform of the commercial power supply will be distorted if the commercial power supply contains
excessive harmonics. Machines with such a commercial power supply will malfunction or generate
excessive heat.
Basic frequency (60 Hz)
Third harmonic (180 Hz)
Distorted current wave
form
D
Causes of Harmonics Generation
•
Usually, electric machines have built-in circuitry that converts commercial AC power supply into DC
power.
Such AC power, however, contains harmonics due to the difference in current flow between DC and
AC.
Obtaining DC from AC Using Rectifiers and Capacitors
DC voltage is obtained by converting AC voltage into a pulsating one-side voltage with rectifiers and
smoothing the pulsating one-side voltage with capacitors. Such AC current, however, contains harmon-
ics.
Design
Chapter 2
Summary of Contents for SYSDRIVE 3G3MV-A2001
Page 1: ...Cat No I527 E1 04 USER S MANUAL SYSDRIVE 3G3MV Multi function Compact Inverter...
Page 2: ......
Page 3: ...USER S MANUAL Multi function Compact Inverter SYSDRIVE 3G3MVSERIES...
Page 18: ......
Page 23: ...Chapter 1 Overview 1 1 Functions 1 2 Nomenclature 1 3 New Features 1...
Page 32: ......
Page 33: ...Chapter 2 Design 2 1 Installation 2 2 Wiring 2...
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Page 93: ...Chapter 4 Test Run 4 1 Procedure for Test Run 4 2 Operation Example 4...
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Page 269: ...Chapter 9 Specifications 9 1 Inverter Specifications 9 2 Option Specifications 9...
Page 303: ...Chapter 10 List of Parameters 10...
Page 337: ...Chapter 11 Using the Inverter for a Motor 11...
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Page 344: ...I527 E1 04...