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 CORRESP
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0918676
(2001-07-31)
|
우선권정보 |
DE-0059334 (2000-11-29) |
발명자
/ 주소 |
- Raith, Sebastian
- Segger, Bernd
|
출원인 / 주소 |
- Siemens Aktiengesellschaft
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
6 |
초록
▼
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 interme
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.
대표청구항
▼
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 interme
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. respectively, so as to achieve motion of the arm member and stage, relative to the support structure, in the guide plane; and the arm member defining a conduit, internal with respect to the arm member, that conducts a coolant fluid to and from the mover coils. 5. A stage apparatus for moving and positioning a stage within a guide plane, comprising: a support structure; a stage; a guide bar attached to the stage such that the stage and guide bar have a constant positional relationship relative to each other, the guide bar defining at least three end portions extending in respective directions from the stage in a plane parallel to the guide plane; and each end portion comprising a respective plane bearing configured to support the respective end portion relative to the support structure without the respective plane bearing contacting the support structure. 6. The stage apparatus of claim 5 further comprising an arm connected to the stage parallel to the guide bar and including a first end and a second end, wherein the support structure further comprises a respective linear-motor stator for each of the first and second ends of the arm; and each of the first and second ends of the arm comprises a respective linear-motor mover configured to interact with a respective linear-motor stator so as to achieve motion of the arm, guide bar, and stage in the guide plane relative to the support structure. 7. The stage apparatus of claim 5, wherein: each plane bearing is configured as a gas bearing comprising at least one gas-bearing pad; and the guide bar defines internal conduits providing gas supply to and gas recovery and exhaust from the gas bearings. 8. A stage apparatus for moving and positioning a stage within a guide plane, comprising: a stage; a plurality of arm members connected to and extending from the stage, each arm member having respective first and second end portions each having attached thereto a respective linear-motor mover; a plurality of guide bars extending from the stage, each guide bar having at least one respective end portion including a non-contacting bearing; a support structure comprising (i) a respective linear-motor stator associated with each of the linear-motor movers, (ii) a respective guide plate associated with each linear-motor stator, wherein the bearings are configured to slide along respective guide plates, and (iii) the stators and respective guide plates are arranged in a stacked configuration relative to each other in a direction perpendicular to the guide plane. 9. A stage apparatus for moving and positioning a stage within a guide plane, comprising: a support structure; a main stage configured to hold a process object and to move, with the process object, relative to the support structure within a guide plane; and a substage situated relative to the main stage and the support structure, the substage being configured to mediate flow of a fluid to and from the main stage while the substage is being moved and positioned relative to the main stage, wherein the main stage and substage interrelate with each other via non-contacting plane bearings situated at respective interrelation portions of the main stage and substage at which the main stage and substage, respectively, interrelate with each other, and the flow of the fluid to and from the main stage occurs at the respective interrelation portions. 10. The stage apparatus of claim 9, wherein the plane bearings are respective air bearings each comprising a respective air pad. 11. The stage apparatus of claim 9, further comprising respective conduits for conducting the flow of fluid to and from the main stage. 12. The stage apparatus of claim 9, further comprising a linear motor situated and configured to drive the main stage in the guide plane relative to the support structure, the linear motor comprising a respective linear-motor stator at each of the interrelation portions, wherein the main stage and substage interr
이 특허에 인용된 특허 (6)
-
Ma Daming,CAX ; Wu Bin,CAX ; Zargari Navid R.,CAX ; Rizzo Steven C.,CAX, CSI based drive having active damping control.
-
Abbondanti Alberto (Plum Boro PA), Commutation circuit for load-commutated inverter induction motor drives.
-
Stemmler, Herbert, Converter with fast-acting overvoltage protection.
-
Khkipuro Matti (HyvinkFIX), Frequency converter, procedure for controlling it and motor control using a frequency converter.
-
Shimamura Takeo (Tokyo JPX), Operating control device and method for wound-rotor induction machine.
-
Kume Tsuneo ; Swamy Mahesh M., Variable frequency drive noise attenuation circuit.
이 특허를 인용한 특허 (7)
-
Atmur, Robert J., Apparatus and methods to damp electromechanical device vibration.
-
Huber,Norbert, Converter with damping mechanism for the avoidance of resonances.
-
Wu,Bin; Rizzo,Steven C.; Zagari,Navid R.; Xiao,Yuan, Integrated DC link choke and method for suppressing common-mode voltage in a motor drive.
-
Wu,Bin; Rizzo,Steven C.; Zagari,Navid R.; Xiao,Yuan, Integrated DC link choke and method for suppressing common-mode voltage in a motor drive.
-
Iribe,Masatsugu; Yamanaka,Hajime; Itoh,Yoshihiro; Suzuki,Shinya, Motor, actuator and controller thereof.
-
Hofmann, Tobias; Raith, Sebastian; Segger, Bernd, Multi-axes industrial processing machine.
-
Urresty, Julio Cesar, Protecting a permanent magnet generator.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.