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公开(公告)号：US11228272B2
公开(公告)日：2022-01-18
申请号：US16912313
申请日：2020-06-25
Applicant: Tula eTechnology, Inc.
Inventor： Adya S. Tripathi
Abstract: A variety of methods, controllers and electric machine systems are described that facilitate pulsed control of electric machines (e.g., electric motors and generators) to improve the machine's energy conversion efficiency. Under selected operating conditions, the electric machine is intermittently driven (pulsed). The pulsed operation causes the output of the electric machine to alternate between a first output level and a second output level that is lower than the first output level. The output levels are selected such that at least one of the electric machine and a system that includes the electric machine has a higher energy conversion efficiency during the pulsed operation than the electric machine would have when operated at a third output level that would be required to drive the electric machine in a continuous manner to deliver the desired output. In some embodiments, the second output level is zero torque.
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公开(公告)号：US11133767B2
公开(公告)日：2021-09-28
申请号：US17200048
申请日：2021-03-12
Applicant: Tula eTechnology, Inc.
Inventor： Louis J. Serrano , Paul Carvell , Adya S. Tripathi
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：US12003202B2
公开(公告)日：2024-06-04
申请号：US18180358
申请日：2023-03-08
Applicant: Tula eTechnology, Inc.
Inventor： Adya S. Tripathi
CPC classification number: H02P27/08 , H02P27/085 , H03M3/438 , H03M3/456
Abstract: A variety of methods, controllers and electric machine systems are described that facilitate pulsed control of electric machines (e.g., electric motors and generators) to improve the machine's energy conversion efficiency. Under selected operating conditions, the electric machine is intermittently driven (pulsed). The pulsed operation causes the output of the electric machine to alternate between a first output level and a second output level that is lower than the first output level. The output levels are selected such that at least one of the electric machine and a system that includes the electric machine has a higher energy conversion efficiency during the pulsed operation than the electric machine would have when operated at a third output level that would be required to drive the electric machine in a continuous manner to deliver the desired output. In some embodiments, the second output level is zero torque.
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公开(公告)号：US11626827B2
公开(公告)日：2023-04-11
申请号：US17544446
申请日：2021-12-07
Applicant: Tula eTechnology, Inc.
Inventor： Adya S. Tripathi
Abstract: A variety of methods, controllers and electric machine systems are described that facilitate pulsed control of electric machines (e.g., electric motors and generators) to improve the machine's energy conversion efficiency. Under selected operating conditions, the electric machine is intermittently driven (pulsed). The pulsed operation causes the output of the electric machine to alternate between a first output level and a second output level that is lower than the first output level. The output levels are selected such that at least one of the electric machine and a system that includes the electric machine has a higher energy conversion efficiency during the pulsed operation than the electric machine would have when operated at a third output level that would be required to drive the electric machine in a continuous manner to deliver the desired output. In some embodiments, the second output level is zero torque.
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公开(公告)号：US12301149B2
公开(公告)日：2025-05-13
申请号：US18644996
申请日：2024-04-24
Applicant: Tula eTechnology, Inc.
Inventor： Adya S. Tripathi
Abstract: Methods, controllers and electric machine systems are described that facilitate pulsed control of electric machines (e.g., electric motors and generators) to improve the machine's energy conversion efficiency. Under selected operating conditions, the electric machine is intermittently driven (pulsed). The pulsed operation causes the output of the electric machine to alternate between a first output level and an off state. The output levels are selected such that the electric machine has a higher energy conversion efficiency during the pulsed operation than the electric machine would have when operated at a third output level that would be required to drive the electric machine in a continuous manner to deliver the desired output. In some embodiments, the power converter it turned off during at least portions of the time that the electric machine is pulsed off.
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Patent Agency Ranking
公开(公告)号：US11623529B2
公开(公告)日：2023-04-11
申请号：US17497147
申请日：2021-10-08
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：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：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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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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公开(公告)号：US10742155B2
公开(公告)日：2020-08-11
申请号：US16353166
申请日：2019-03-14
Applicant: Tula eTechnology, Inc.
Inventor： Adya S. Tripathi
Abstract: A variety of methods, controllers and electric machine systems are described that facilitate pulsed control of electric machines (e.g., electric motors and generators) to improve the machine's energy conversion efficiency. Under selected operating conditions, the electric machine is intermittently driven (pulsed). The pulsed operation causes the output of the electric machine to alternate between a first output level and a second output level that is lower than the first output level. The output levels are selected such that at least one of the electric machine and a system that includes the electric machine has a higher energy conversion efficiency during the pulsed operation than the electric machine would have when operated at a third output level that would be required to drive the electric machine in a continuous manner to deliver the desired output. In some embodiments, the second output level is zero torque.
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