Invention Grant
- Patent Title: DAMPING OF RESONANT PEAKS IN AN ELECTRIC MOTOR WHICH IS OPERATED USING A CONVERTER WITH AN INTERMEDIATE VOLTAGE CIRCUIT, BY MEANS OF MATCHED IMPEDANCE TO GROUND AT THE MOTOR STAR POINT, AND A CORRESPONDING ELECTRIC MOTOR
- Patent Title (中): 在使用具有中间电压电路的转换器的电动机中,通过在电机星点处接地匹配的阻抗和相应的电动马达来阻止共振峰值的阻尼
-
Application No.: US09918676Application Date: 2001-07-31
-
Publication No.: US06583598B2Publication Date: 2003-06-24
- Inventor: Sebastian Raith , Bernd Segger
- Applicant: Sebastian Raith , Bernd Segger
- Priority: DE10059334 20001129
- Main IPC: G05B501
- IPC: G05B501

Abstract:
A system and method for damping of resonant peaks in an electric motor which is operated using a converter with an intermediate voltage circuit, by means of a matched impedance to ground at the motor star point, and a corresponding electric motor is disclosed. In a converter system having an intermediate voltage circuit which operates with a mains system input inductor in the step-up converter mode or has other input-side inductances, there is a risk of natural system oscillations being formed via discharge capacitances in conjunction with motors. If the motor now has an amplitude/frequency response with a pronounced resonant frequency in the region of such natural system oscillations, then there is a risk of higher voltages occurring at the motor star point than in the motor phases. This is prevented by the present invention by a termination of the lattice network, which is formed by the winding sections, in the motor at the motor star point by means of a suitably selected impedance with respect to ground, which advantageously comprises a series circuit formed from a non-reactive resistance and a capacitance.
Public/Granted literature
Information query