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Active damping of common-mode oscillations in electric drive systems using direct current control
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| Author(s) |
Maximilian SCHMITT |
| Abstract |
In electrical systems parasitic capacitances are forming resonant circuits in combination with the inductances of the system. Each inverter switching operation is stimulating common-mode oscillations in these resonant circuit which can lead to critical overvoltages at the motor terminals. These voltages could damage the insulation system of the electrical machine and reduce the service life of the drive. An active damping method reducing common-mode oscillations by influencing the inverter pulse pattern is presented in this paper. Simulation results are shown, comparing the operation of a direct current controlled inverter with a classical pulse width modulation controlled inverter. By using the new control algorithm with active damping method, the voltage at the motor terminals can be reduced to non-critical values. |
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| Filename: | 0036-epe2017-full-13350421.pdf |
| Filesize: | 1.666 MB |
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| Type |
Members Only |
| Date |
Last modified 2018-04-17 by System |
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