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公开(公告)号：US20210146909A1
公开(公告)日：2021-05-20
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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12.发明公开公开(公告)号：US20240088806A1
公开(公告)日：2024-03-14
申请号：US18362602
申请日：2023-07-31
Applicant: Tula eTechnology, Inc.
Inventor： Paul CARVELL , Babak MAZDA
CPC classification number: H02P6/08 , H02P21/20 , H02P2207/05
Abstract: A pulsed control of an Externally Excited Synchronous Machines (EESM), including a boost circuit and method for (1) harvesting the field energy stored in rotor winding when the EESM is transitioning to the off state following an on pulses, (2) storing the harvested field energy on a storage device, (3) optionally “topping” up the harvested field energy stored on the storage device, and (4) supplying the harvested and stored field energy as a “boost voltage” to the rotor, just as the EESM is transitioning on for the next pulse, the boost voltage aiding the rotor in quickly overcoming it's start-up inductance, rapidly turning on the rotor, resulting in a much faster transition time from the off state to the on state at the start of the next pulse.
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13.发明公开公开(公告)号：US20240063744A1
公开(公告)日：2024-02-22
申请号：US18452050
申请日：2023-08-18
Applicant: Tula eTechnology, Inc.
Inventor： Zakirul ISLAM , Paul CARVELL , Philippe FARAH
IPC: H02P27/08
CPC classification number: H02P27/085
Abstract: An electric machine comprising a power supply and an electrically excited synchronous machine is provided. The electrically excited synchronous machine comprises a stator with stator windings and a rotor with a plurality of rotor poles, wherein the rotor has a magnetic field knee region and rotor field windings around the plurality of rotor poles. A power converter is coupled between the power supply and the electrically excited synchronous machine. The power converter is arranged to provide a pulsed operation by providing a pulsed current to the stator windings and a pulsed DC current to the rotor field windings, wherein the pulsed DC current continuously provides a magnetic field in the rotor.
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公开(公告)号：US20230283211A1
公开(公告)日：2023-09-07
申请号：US18318193
申请日：2023-05-16
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：US20200212834A1
公开(公告)日：2020-07-02
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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Patent Agency Ranking
公开(公告)号：US20240136968A1
公开(公告)日：2024-04-25
申请号：US18514489
申请日：2023-11-20
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：US20230219426A1
公开(公告)日：2023-07-13
申请号：US18184232
申请日：2023-03-15
Applicant: Tula eTechnology, Inc.
Inventor： Paul CARVELL , Adya S. TRIPATHI
CPC classification number: B60L15/08 , B60L15/20 , H02P23/02 , H02P23/0027 , B60L2240/421 , B60L2240/527 , B60L2240/423
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：US20220094290A1
公开(公告)日：2022-03-24
申请号：US17544442
申请日：2021-12-07
Applicant: Tula eTechnology, Inc.
Inventor： Paul CARVELL
Abstract: A variety of methods, controllers and electric machine systems are described that facilitate pulsed control of electric machines to improve the energy efficiency of the electric machine when conditions warrant. Selected transitions between pulsing output levels are controlled to provide a cubic or higher order transition torque profile. In various implementations, cubic, quintic or higher order transition profiles are use. The use of such transition torque profiles can improve NVH characteristics of the electric machine while providing energy efficient pulse transitions.
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公开(公告)号：US20210323415A1
公开(公告)日：2021-10-21
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：US20210203263A1
公开(公告)日：2021-07-01
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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