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公开(公告)号：US11167648B1
公开(公告)日：2021-11-09
申请号：US17204269
申请日：2021-03-17
Applicant: Tula eTechnology, Inc.
Inventor： Paul Carvell , Adya S. Tripathi
Abstract: Modulated pulse control of electric machines to deliver a desired output in a more energy efficient manner by either (a) operating the electric machine in a continuous mode when a requested torque demand is greater than the peak efficiency torque of the electric machine or (b) in a pulsed modulation mode when the requested torque demand is less than the peak efficiency torque of the electric machine. When operating in the pulsed modulation mode, the inverter may be deactivated to further improve the system efficiency when field weakening is not required to mitigate or eliminate generation of a retarding torque in situations when Back Electromagnetic Force (BEMF) exceeds a supply voltage for the inverter of the machine.
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公开(公告)号：US20240120860A1
公开(公告)日：2024-04-11
申请号：US18374459
申请日：2023-09-28
Applicant: Tula eTechnology, Inc.
Inventor： Paul Carvell , Md. Zakirul Islam
IPC: H02P6/28 , H02P6/32 , H02P25/022
CPC classification number: H02P6/28 , H02P6/32 , H02P25/022
Abstract: A method of controlling an electric machine having a separately excitable rotor and stator includes exciting the rotor and the stator at the same time to generate an optimal magnetic flux in the electric machine. The method includes maintaining the optimal magnetic flux by reducing a stator current as a rotor current rises. The method also includes providing a torque current to the stator as the rotor current rises such that the electric machine produces a demanded torque while the rotor current rises.
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公开(公告)号：US11863096B2
公开(公告)日：2024-01-02
申请号：US17166646
申请日：2021-02-03
Applicant: Tula eTechnology, Inc.
Inventor： Babak Mazda , Adya S. Tripathi , Paul Carvell
IPC: H02P27/08
CPC classification number: H02P27/085 , H02P2201/09
Abstract: A boost circuit is arranged to reduce rise and fall times of pulsed power used for pulsed control operation of electric machines. Magnetic energy present in the electric machine at the end of a pulse is extracted by the boost circuit to reduce the pulse fall time. The energy is stored by the boost circuit and then applied at the beginning of a subsequent pulse to reduce the rise time. By reducing rise and fall times compared to not using such a boost circuit, machine efficiency is improved.
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Patent Agency Ranking
公开(公告)号：US20230268852A1
公开(公告)日：2023-08-24
申请号：US18138439
申请日：2023-04-24
Applicant: Tula eTechnology, Inc.
Inventor： Andrew W. Phillips , Matthew A. Younkins , Paul Carvell , John M. Fuerst
IPC: H02P6/10
CPC classification number: H02P6/10 , H02P2205/05 , H02P2101/45
Abstract: A method of controlling an electric motor includes receiving a duty cycle for the electric motor for delivering a target torque from the electric motor, generating a pulse train, and pulsing the electric motor with the generated pulse train. Generating the pulse train being at least partially based on the received duty cycle. The generated pulse train optimized to improve at least one of noise, vibration, or harshness of the electric motor when compared to a constant pulse frequency.
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公开(公告)号：US11695361B2
公开(公告)日：2023-07-04
申请号：US17839254
申请日：2022-06-13
Applicant: Tula eTechnology, Inc.
Inventor： Paul Carvell , Amnish Singh , Tate Allen Cooper
Abstract: An electric machine is provided. A polyphase machine is provided. A power inverter is electrically connected to the polyphase machine. A controller is electrically connected to the power inverter, wherein the controller provides switching signals to the power inverter, wherein the controller comprises a trajectory calculator that provides an optimized trajectory for transitioning the polyphase machine from a first torque to a second torque.
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公开(公告)号：US11637513B2
公开(公告)日：2023-04-25
申请号：US17695663
申请日：2022-03-15
Applicant: Tula eTechnology, Inc.
Inventor： Andrew W. Phillips , Matthew A. Younkins , Paul Carvell , John M. Fuerst
IPC: H02P6/10 , H02P101/45
Abstract: A method of controlling an electric motor includes receiving a duty cycle for the electric motor for delivering a target torque from the electric motor, generating a pulse train, and pulsing the electric motor with the generated pulse train. Generating the pulse train being at least partially based on the received duty cycle. The generated pulse train optimized to improve at least one of noise, vibration, or harshness of the electric motor when compared to a constant pulse frequency.
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公开(公告)号：US11427177B2
公开(公告)日：2022-08-30
申请号：US16689450
申请日：2019-11-20
Applicant: Tula eTechnology, Inc.
Inventor： Louis J. Serrano , Paul Carvell
Abstract: A variety of methods, controllers and electric machine systems are described for pulse control of electric machines (e.g., electric motors and generators). To improve the energy conversion efficiency of the machine, pulse control involves determining if the machine should operate in a continuous mode or pulse mode, and if the latter, defining a magnitude, duty cycle, and frequency for the pulses. One or more tables, indexing by a wide range of speeds and torque requests, is/are used to define the pulsing frequency or a pulsing frequency pattern.
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公开(公告)号：US10944352B2
公开(公告)日：2021-03-09
申请号：US16818570
申请日：2020-03-13
Applicant: Tula eTechnology, Inc.
Inventor： Babak Mazda , Adya S. Tripathi , Paul Carvell
IPC: H02P27/08
Abstract: A boost circuit is arranged to reduce rise and fall times of pulsed power used for pulsed control operation of electric machines. Magnetic energy present in the electric machine at the end of a pulse is extracted by the boost circuit to reduce the pulse fall time. The energy is stored by the boost circuit and then applied at the beginning of a subsequent pulse to reduce the rise time. By reducing rise and fall times compared to not using such a boost circuit, machine efficiency is improved.
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