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公开(公告)号：US12015315B2
公开(公告)日：2024-06-18
申请号：US17928410
申请日：2021-05-28
Applicant: SEDEMAC MECHATRONICS PVT LTD
Inventor： Amit Dixit , Anaykumar Joshi
CPC classification number: H02K21/22 , F02N11/04 , H01R4/625 , H02K3/14 , H02K7/1815 , H02K11/0094
Abstract: An Integrated Starter Generator system (100) comprising a battery (110) and a three-phase brushless DC electric machine (130). The electric machine (130) has a stator (132) with 3n stator teeth (132′), ‘n’ being a natural number, and each stator tooth (132′) has a coil corresponding to one of the three phases. The electric machine (130) further has a rotor (134) with 4n rotor poles (134′) facing the stator (132), and magnets on the rotor poles (134′) are disposed with an alternating sequence of magnet polarity facing the stator (132). Herein, back-emf constant of the electric machine (130) is substantially between 25% of a nominal battery voltage and 75% of the nominal battery voltage.
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公开(公告)号：US11190118B2
公开(公告)日：2021-11-30
申请号：US16487938
申请日：2017-11-23
Applicant: SEDEMAC MECHATRONICS PVT LTD
Inventor： Amit Dixit , Arvind Athavale , Anaykumar Joshi
Abstract: A system for controlling electrical power generated by a permanent magnet machine coupled to an internal combustion engine includes a central processing unit configured to determine speed of the machine, and compare the machine speed with a predetermined range of machine speeds, a series power switching circuit connected between the machine and a battery, a bus decoupling power switch connected between a voltage bus and the battery, and a bridge switching circuit connected between the voltage bus and the machine and configured to amplify voltage generated by the machine if the machine speed is less than a predetermined value or fall within a predetermined range thereby charging the battery with amplified voltage even at lower machine speeds. The central processing unit selectively connects the bridge switching circuit with the battery by actuating the bus decoupling switch and/or the series power switching circuit depending upon the machine speed.
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公开(公告)号：US12119769B2
公开(公告)日：2024-10-15
申请号：US18014539
申请日：2021-05-21
Applicant: SEDEMAC MECHATRONICS PVT LTD
Inventor： Anaykumar Joshi , Amit Dixit
CPC classification number: H02P27/085 , H02P6/007
Abstract: The present invention relates to a method (200) and system (100) for controlling a rotary electric machine wherein a state of the rotary electric machine is determined between a low speed state and a high speed state. In the low speed state, a first rotor position (P1) and a first rotor speed (S1) are estimated based on intra-PWM current ripple (ΔX), a mean current vector (Y) and an inductance vector. A second rotor position (P2) and second rotor speed (S2) is estimated based on average current flowing through stator phase windings. State of rotary electric machine is selected based on estimated first rotor speed (S1) and/or estimated second rotor speed (S2). At low speed state, PWM signals are updated based on estimated first rotor position (P1), and at high speed state, PWM signals are updated based on estimated second rotor position (P2).
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