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公开(公告)号：US11862963B2
公开(公告)日：2024-01-02
申请号：US17297559
申请日：2018-11-30
Applicant: Safran Power USA, LLC
Inventor： Lev Sorkin , Priyanka D. Shivthare
IPC: H02H7/06 , H02P29/024 , H02P9/10
CPC classification number: H02H7/065 , H02P9/10 , H02P29/0241
Abstract: Described is a method including monitoring a point of regulation voltage input to a generator control unit and monitoring a generator output voltage as a backup point of regulation voltage input. The method also includes detecting an overvoltage fault at the point of regulation voltage input, the backup point of regulation voltage input, or both. Additionally, the method includes opening a first solid-state switch (110) in response to detecting the overvoltage fault. Opening the first solid-state switch (110) prevents provision of an input signal (104) to a generator excitation field (102). Further, the method includes opening a generator excitation field relay (112) in response to detecting the overvoltage fault. Opening the excitation field relay (112) also prevents provision of the input signal (104) to the generator excitation field (102).
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公开(公告)号：US11732663B2
公开(公告)日：2023-08-22
申请号：US17922881
申请日：2020-05-06
Applicant: SAFRAN POWER USA, LLC
Inventor： Lev Sorkin , Cory Ackerman , Nathen Hutchison , Benjamin Lange
CPC classification number: F02D41/062 , F02N11/0859 , F02D2200/101 , F02N2200/022
Abstract: Systems and techniques for engine starter control may include determining a current speed band associated with an engine start for a current time increment, determining a previous speed band associated with the engine start for a previous time increment within the engine start, receiving a measured current value, determining a target current value based on the current speed band, the previous speed band, whether an acceleration or deceleration occurred between the current speed band and the previous speed band, and a mode of a system for engine starter control, and adjusting a current for the engine start based on the target current value.
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公开(公告)号：US20230170753A1
公开(公告)日：2023-06-01
申请号：US17922898
申请日：2020-05-06
Applicant: SAFRAN POWER USA, LLC , SAFRAN
Inventor： Lev SORKIN , Matthew Thomas BURGER , Sara ROGGIA , Sergey MISCHUK
Abstract: A variable frequency generator (VFG) may include a housing, a shaft, a rotor, and a stator with slots. The VFG also includes a first set of stator windings including a first subset of windings and a second subset of windings and a second set of stator windings including a first subset of windings and a second subset of windings. The windings of the first subset of the first set of stator windings are co-located with the windings of the first subset of the second set of stator windings so as to share a common slot of the plurality of slots of the stator. Further, the windings of the second subset of the first set of stator windings are co-located with the windings of the second subset of the second set of stator windings so as to share a common alternative slot of the plurality of slots of the stator.
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公开(公告)号：US20240102432A1
公开(公告)日：2024-03-28
申请号：US17950497
申请日：2022-09-22
Applicant: Safran Electrical & Power , Safran Power USA, LLC
Inventor： Sachin Aggarwal , Matthew Fallon , Nicodeme Faucher , Abdoulahad Thiam
Abstract: Described is a fan assembly for an electrical aircraft motor having an axial fan with an inner hub of a first diameter and an outer hub of a second diameter. The outer hub may be concentrically aligned with the inner hub. A plurality of blades may extend between the inner hub and the outer hub. The fan assembly may also have a mounting plate connected to the inner hub. The mounting plate may attach to a component of the electrical aircraft motor.
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公开(公告)号：US11462982B2
公开(公告)日：2022-10-04
申请号：US16493278
申请日：2018-09-19
Applicant: Safran Power USA, LLC
Inventor： Lev Sorkin , Matthew Thomas Burger
Abstract: Described is a hybrid permanent magnet and wire wound starter generator system. The system includes a polyphase stator that converts a rotating magnetic field to electrical energy. The system also includes a rotor including a plurality of permanent magnets and a wound rotor section. The plurality of permanent magnets and the wound rotor section each generate a portion of the rotating magnetic field. Further, the system includes a controller that controls a polarity of the wound rotor section by transitioning the wound rotor section between a magnetic flux enhancement mode and a magnetic flux weakening mode.
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Patent Agency Ranking
公开(公告)号：US11444561B2
公开(公告)日：2022-09-13
申请号：US17276149
申请日：2018-09-20
Applicant: Safran Power USA, LLC
Inventor： Lev Sorkin , Manali S. Patil
IPC: H02P9/00 , H02P9/10 , H02P9/30 , H02P101/30
Abstract: Described is a system that includes a polyphase generator and a polyphase bridge rectifier electrically coupled to an output of the polyphase generator. The polyphase bridge rectifier may output a positive rectified ripple signal and a negative rectified ripple signal, and the positive rectified ripple signal and the negative rectified ripple signal may be summed to produce a total ripple signal. Further, the system may include a generator regulation feedback control loop that regulates the output of the polyphase generator with a field control signal. In an embodiment, the field control signal is based on summing the total ripple signal and a reference voltage.
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公开(公告)号：US20230163698A1
公开(公告)日：2023-05-25
申请号：US17922904
申请日：2020-05-05
Applicant: SAFRAN POWER USA, LLC
Inventor： Lev Sorkin , Sergey Mischuk , Boaz De-Medonsa
IPC: H02M7/5387 , H02M7/5395 , H02M1/00
CPC classification number: H02M7/53871 , H02M7/5395 , H02M1/0025
Abstract: A variable speed constant frequency electric voltage regulation circuit may include a slow voltage loop detecting and adjust an amplitude of an output signal of the circuit. A fast voltage loop of the circuit may include an error amplifier detecting a difference between a reference sine wave signal and the output signal. A current control loop may include a current controller and an inverter. A first switch may toggle a gain of the circuit between a gain associated with a normal mode and a gain associated with a power transfer mode based on a power transfer command signal. A second switch may toggle control between the current control loop in the power transfer mode and the fast and slow voltage loops in the normal mode. The sample/hold circuit eliminates the slow voltage loop from regulating the output during the power transfer.
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公开(公告)号：US20230386773A1
公开(公告)日：2023-11-30
申请号：US18250025
申请日：2020-10-23
Applicant: SAFRAN POWER USA, LLC
Inventor： Christopher Wyatt , Dean Morgan
IPC: H01H50/34
CPC classification number: H01H50/34
Abstract: An electrical contactor that includes separable contacts that include a first pair of mating contacts and a second pair of mating contacts. The electrical contactor also includes a first portion that includes the first pair of mating contacts and a solenoid plunger that is configured to receive a plunger rod; The electrical contactor additionally includes a second portion that includes the second pair of mating contacts. The plunger rod is configured to be inserted within the solenoid plunger and rotated towards the second portion to be threaded into the second portion to enable the second portion to be pulled up towards the first portion. The second pair of mating contacts are configured to move closer to the first pair of mating contacts until the second pair of mating contacts mate with the first pair of mating contacts to increase a wear allowance to a predetermined desired level.
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公开(公告)号：US20230299643A1
公开(公告)日：2023-09-21
申请号：US18018640
申请日：2020-07-31
Applicant: SAFRAN POWER USA, LLC
Inventor： Sachin Aggarwal , Steven McDaniel , Eric Kline , Bryan Mackulin
IPC: H02K9/22 , F04D29/28 , F04D29/056 , F04D29/58 , F04D29/42 , F04D17/08 , H02K7/00 , H02K7/08 , H02K7/14
CPC classification number: H02K9/22 , F04D29/281 , F04D29/056 , F04D29/582 , F04D29/4226 , F04D17/08 , H02K7/003 , H02K7/08 , H02K7/14
Abstract: A rotating machine includes a housing that defines an inlet for air to enter into the rotating machine and an outlet for the air to exit the rotating machine. The rotating machine can also include a bearing received in the housing and a shaft rotationally supported by the bearing. The shaft defines a rotational axis that extends in a longitudinal direction. The rotating machine also includes a fan attached to the shaft so as to be coaxially aligned with the bearing. The fan defines an airflow path including an intake that receives the air from the inlet of the housing and an exhaust that discharges the air from the intake toward the outlet of the housing. A portion of the airflow path between the intake and the exhaust is in a direction that is not parallel to the rotational axis.
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公开(公告)号：US20230170834A1
公开(公告)日：2023-06-01
申请号：US17922868
申请日：2020-05-06
Applicant: SAFRAN POWER USA, LLC
Inventor： Lev Sorkin , Cory Ackerman
CPC classification number: H02P27/085 , H02P7/29
Abstract: According to one aspect, a starter-generator control unit may include a comparator, a pulse width modulation (PWM) duty cycle generator, a randomizer, and a sequencer. The comparator may receive a current reading from a current sensor and a target current from a target current lookup table and generate an output comparator signal indicative of an increase or a decrease in a current value of a pulse width modulation (PWM) duty cycle. The PWM duty cycle generator may receive the signal from the comparator and generate an output PWM signal. The randomizer may generate a randomly time-varying update signal. The PWM duty cycle generator may receive the randomly time-varying update signal which may control a cycle time associated with the PWM duty cycle generator. The sequencer may receive the output PWM signal and generate a gate control signal for controlling an inverter based on the output PWM signal.
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