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公开(公告)号：US20210273590A1
公开(公告)日：2021-09-02
申请号：US17256042
申请日：2019-04-05
Applicant: ABB Schweiz AG
Inventor： Mehanathan Pathmanathan , Pedro Rodriguez , Chenjie Lin , Ghanshyam Shrestha , Tuomas Janhunen , Pasi Paloheimo
Abstract: A method of performing de-excitation of a brushless synchronous machine having a stator; and a rotor including: a field winding, an exciter armature, a rectifier having thyristors, the rectifier having input terminals connected to the exciter armature and output terminals connected to the field winding, a field discharge resistor connected in series with the field winding, and a bypass switch connected in parallel with the field discharge resistor, the bypass switch being operable between a closed state in which the field discharge resistor is bypassed, and an open state, wherein the method including: a) controlling the thyristors to fire only during a negative half-cycle of the armature voltage waveforms, and b) controlling the bypass switch to obtain the open state from the closed state to thereby discharge a field winding current through the field discharge resistor.
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公开(公告)号：US10700578B2
公开(公告)日：2020-06-30
申请号：US15858043
申请日：2017-12-29
Applicant: ABB Schweiz AG
Inventor： Ghanshyam Shrestha , Chenjie Lin , Mehanathan Pathmanathan , Pedro Rodriguez
IPC: H02K11/042 , H02K3/20 , H02K21/04 , H02K19/28
Abstract: Unique systems, methods, techniques and apparatuses of an exciterless synchronous generator are disclosed. One exemplary embodiment is an exciterless synchronous generator comprising a stator, a rotor, and a startup excitation system. The stator includes a set of stator windings. The rotor includes an energy harvest winding, a DC power supply including a DC bus and coupled to the energy harvest winding, and a field winding coupled to the DC power supply. The startup excitation system comprises one of a magnetic field generation system structured to generate a magnetic field received by the energy harvest winding in response to a rotation of the rotor, wherein the magnetic field is converted to DC power with the DC power supply and transmitted to the field winding; or a rotor DC power source including and diode coupled in series across the DC bus.
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公开(公告)号：US09977085B2
公开(公告)日：2018-05-22
申请号：US15507110
申请日：2015-09-08
Applicant: ABB Schweiz AG
Inventor： Pedro Rodriguez , Subrat Sahoo , Cajetan Pinto
CPC classification number: G01R31/346 , G01R31/343 , H02P9/10 , H02P29/0243
Abstract: A method and system of determining an electro-mechanical fault condition in a synchronous machine having a stator, a rotor, and exciter. The method includes: a) obtaining an exciter current signal which is a measurement of an exciter current through stationary windings of the exciter, b) transforming the exciter current signal to obtain an exciter current frequency spectrum, and c) determining whether an electro-mechanical fault condition is present, and a type of the electro-mechanical fault condition, based on harmonic content related to the frequency of the stator, of the exciter current frequency spectrum.
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公开(公告)号：US20240333187A1
公开(公告)日：2024-10-03
申请号：US18604667
申请日：2024-03-14
Applicant: ABB Schweiz AG
Inventor： Omer Ikram Ul Haq , Rahul Kanchan , Pedro Rodriguez
Abstract: A method of identifying parameters of a motor system having an electric motor assembly and a control system, for vibration reduction in the electric motor assembly, the method including: a) sweeping a frequency of an oscillating reactive torque injected into the electric motor, b) determining a natural frequency of the motor system, the natural frequency being the frequency at which the oscillating reactive torque produces a maximum amplitude of a vibration-related parameter obtained based on vibration-related measurements by sensors mounted to the electric motor, c) incrementally increasing a magnitude of reactive torque oscillating at the natural frequency, injected to the electric motor, d) obtaining a magnitude of the vibration-related parameter for each magnitude of the reactive torque injected in step c), and e) determining, for each magnitude of the injected reactive torque, a gain and a phase response of the motor system, the gain being determined based on the magnitude of the injected reactive torque and the corresponding magnitude of the vibration-related parameter, and the phase response being determined based on a phase angle of the injected reactive torque and a phase angle of the corresponding vibration-related parameter.
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公开(公告)号：US20230025973A1
公开(公告)日：2023-01-26
申请号：US17812857
申请日：2022-07-15
Applicant: ABB Schweiz AG
Inventor： Pedro Rodriguez , Rahul Kanchan , Omer Ikram Ul Haq , Qimao Liu , Ingo Stroka
Abstract: A field of electric drive devices and electric machines, such as electric motors and electric generators for industrial applications and more particularly to a method and an arrangement for controlling vibration of a variable frequency drive controlled electric machine. In the method for controlling vibration of a variable frequency drive controlled electric machine, the resonance frequency/frequencies and the stiffness are determined in a ramp up/ramp down test; amount of damping is determined in an impulse test; a mechanical transfer function is determined in a steady drive test; a vibration control model is determined utilizing said resonance frequency/frequencies, said stiffness, the amount of damping and the mechanical transfer function; and vibration is controlled utilizing the vibration control model.
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Patent Agency Ranking
16.发明授权公开(公告)号：US11513155B2
公开(公告)日：2022-11-29
申请号：US15963480
申请日：2018-04-26
Applicant: ABB Schweiz AG
Inventor： Pedro Rodriguez , Subrat Sahoo , Cajetan Pinto
IPC: G01R31/34 , H02P29/024
Abstract: A method and device of determining a fault condition in a synchronous motor including a rotor provided with damper bars and an end ring to which the damper bars are mechanically connected thereby forming a damper cage, wherein the method includes: obtaining a first measurement of an end ring current from a first location along the end ring, processing the first measurement to thereby obtain a processing result, and determining whether a fault condition is present in the synchronous motor based on the processing result.
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公开(公告)号：US11342819B2
公开(公告)日：2022-05-24
申请号：US15762459
申请日：2016-10-04
Applicant: ABB Schweiz AG
Inventor： Pedro Rodriguez , Subrat Sahoo , Cajetan Pinto , Klaus Vänskä
Abstract: A method for preventing a frequency component of a voltage from occurring in an electrical machine including the steps of: obtaining, either by measuring a voltage signal or a current signal from the electrical machine in time domain and transforming the measured signal into frequency domain, by simulating or deducing a first frequency component present in the electrical machine in absence of a grounding, the first frequency component representing a first undesired frequency higher than a limit frequency of 500 Hz; and providing the electrical machine with a first grounding at a grounding location, the first grounding including a resonant circuit resonating at the first undesired frequency. In order to get rid of harmful shaft voltages in the form of sharp voltage peaks at high frequencies, it is first necessary to determine at which undesired frequency or frequencies these voltage peaks occur. Only thereafter can a low impedance grounding be provided that works satisfactorily at the undesired frequency or frequencies.
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公开(公告)号：US20200376666A1
公开(公告)日：2020-12-03
申请号：US16999084
申请日：2020-08-21
Applicant: ABB Schweiz AG
Inventor： Nolwenn Briquet-Kerestedjian , Hao Ding , Rene Kirsten , Bjoern Matthias , Pedro Rodriguez , Arne Wahrburg
Abstract: A robot system includes: a robot arm having a plurality of links and joints by which one of the links is connected to another; sensors for determining, for any one of the joints, an angular velocity of the joint and a torque to which the joint is subject; a neural network connected to the sensors, the neural network receiving therefrom angular velocity and torque data, the neural network being trained to distinguish, based on the angular velocity and torque data, between a normal operation condition of the robot arm, a condition in which the robot arm collides with an outside object, and a condition where a person deliberately interacts with the robot arm; and a controller for controlling motion of the robot arm, a mode of operation of which is variable depending on an operation condition signal output by the neural network. One operation mode is a leadthrough mode.
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公开(公告)号：US10790733B2
公开(公告)日：2020-09-29
申请号：US16121113
申请日：2018-09-04
Applicant: ABB Schweiz AG
Inventor： Chenjie Lin , Ghanshyam Shrestha , Mehanathan Pathmanathan , Pedro Rodriguez , Jan Mikael Westerlund , Tuomas Janhunen
Abstract: Unique systems, methods, techniques and apparatuses of exciterless synchronous machines are disclosed. One exemplary embodiment is a fractional slot synchronous machine comprising a rotor including a first pole pair including a first pole including a first plurality of slots having a first center point and arranged on a first outer surface in a slot pattern; a second pole pair including a second pole including a second plurality of slots having a second center point and arranged on a second outer surface in the slot pattern; energy harvest windings arranged in a winding pattern within a portion of the first plurality of slots and arranged in the same winding pattern within a portion of the second plurality of slots, the energy harvest winding being structured to receive a harmonic power from the stator; and a rectifier structured to receive the harmonic power from the energy harvest winding.
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公开(公告)号：US20200110133A1
公开(公告)日：2020-04-09
申请号：US16496863
申请日：2018-03-06
Applicant: ABB Schweiz AG
Inventor： Pedro Rodriguez , Subrat Sahoo
Abstract: A rotor bar fault in a rotor of an electrical machine having a plurality of rotor bars and an end ring configured to short circuit the rotor bars. The method includes the steps of measuring a first temperature at a first end ring location, and measuring a second temperature at a second end ring location, the second end ring location being different from the first end ring location. As broken rotor bars cause a non-uniform temperature distribution in the end ring, the detection of rotor bar faults can be based on monitored temperatures at different end ring locations.
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