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公开(公告)号：US20240039450A1
公开(公告)日：2024-02-01
申请号：US18254143
申请日：2021-11-22
IPC分类号： H02P29/024 , H02P1/10 , H02P29/032
CPC分类号： H02P29/027 , H02P1/10 , H02P29/032
摘要： The present invention refers to a starting method with two-levels modified and discrete fixed-time or fixed-frequency hysteresis current controller, under high load conditions, of a BLDC motor (10) with trapezoidal-shaped induced voltages, wherein the BLDC motor (10) is driven by an inverter bridge (30) with only one current sensor (20) positioned in the busbar, controlled by means of a processing unit associated to an analog-digital converter, wherein the novelty basically comprises the fact that:
the intensity of the BLDC motor current (Im) is controlled by means of the two-levels and discrete fixed-time or fixed-frequency hysteresis current controller.-
公开(公告)号：US20230057129A1
公开(公告)日：2023-02-23
申请号：US17797078
申请日：2021-02-05
摘要： The present invention reveals an alternative compressor head arrangement capable of eliminating the occurrence of friction wear in the bending areas of the operation valves. For this, an interface blade arranged between the valve blade and the stop blade is used, so that the interface between the static end of the operation valve of the valve blade and the valve stop of the stop blade is fully carried out by the interface blade.
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公开(公告)号：US11959681B2
公开(公告)日：2024-04-16
申请号：US17619854
申请日：2020-06-17
CPC分类号： F25B49/022 , F25B1/02 , F25B31/023 , F25B49/025 , H02P27/085 , F04B35/04 , F04B2203/0204 , F04C2270/135 , F25B2600/021 , F25B2600/0253
摘要： A system for operational acoustic optimization of a variable speed compressor (2) includes a motor (6), a frequency inverter (3), and a control block (5). The frequency inverter (3) is electrically connected to the synchronous motor (6), an electrical network (4), and the control block (5). The control block (5) is configured to control the speed of the motor (6) and to establish a first switching frequency (F1) and a second switching frequency (F2) of the frequency inverter (3). The frequency inverter (3) is configured to start the variable speed compressor (2) by supplying motor (6) with a signal (9) with the first switching frequency (F1) for the duration of a time period (T1) corresponding to at least one alignment operation period of the motor (6) and to supply the motor (6) with a signal (9) with the second switching frequency (F2) after the time period (T1).
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公开(公告)号：US20240026869A1
公开(公告)日：2024-01-25
申请号：US18253554
申请日：2021-11-22
摘要： A positioning process of a piston of a reciprocating compressor is applied before the beginning of a start procedure of a BLDC motor. The reciprocating compressor includes
the BLDC motor having a rotor associated mechanically to the piston;
a frequency inverter;
a current sensor; and
a processing unit having a current controller and a command unit.
The switches are driven by the processing unit to control the currents applied to the phases of the motor.
In each new step of the process, the value of an initial current is higher or equal to the value of the initial current of a previous step; and
the value of a maximum current is higher or equal to the value of the maximum current of the previous step. The process includes adjusting the current at each position to avoid the return of the piston and mechanical oscillation in each new step.-
5.发明公开公开(公告)号：US20230396193A1
公开(公告)日：2023-12-07
申请号：US18033781
申请日：2021-10-26
发明人： Roberto ANDRICH
摘要： The present invention refers to the use of phase advance in motors with non-ideal induced voltages, especially in motors with induced voltages that present a flat region, to avoid instability in the control, wherein the first step is to detect the passage of the voltage induced by the flat region of instability, and then apply a fixed increment in the phase advance in order to avoid the flat region. Detection can be done in two ways: by direct measurement of induced voltage; and measuring the extinguishing time of the freewheel current.
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公开(公告)号：US20230020185A1
公开(公告)日：2023-01-19
申请号：US17787011
申请日：2020-12-17
摘要： The present invention refers to a method and system for reducing noise and positioning of piston (15) in starting failure of engine (20) configured to significantly reduce the noise generated during a starting failure of the engine (20), in addition to allow the piston (15) to be positioned in a position more favorable to a new start.
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公开(公告)号：US20220290662A1
公开(公告)日：2022-09-15
申请号：US17635685
申请日：2020-08-14
IPC分类号： F04B39/00
摘要： The present invention relates to a system for the thermal insulation of the suction muffler in compressors, said system being provided with a muffling device and a protection device, and being capable of optimizing the thermal insulation of the refrigerant fluid that will be compressed, making the operation of the compressor more efficient; and in the proposed system, the muffling device and the protection device are connected via connection regions that allow the formation of a gap between the devices, which improves the operation thereof.
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公开(公告)号：US20240039433A1
公开(公告)日：2024-02-01
申请号：US18038676
申请日：2021-11-23
摘要： This invention refers to a rheostatic braking method, applied on a BLDC motor (10) used in hermetic compressors, comprising:
selecting a first phase and a second phase, connected to the BLDC motor (10), which will be short-circuited, at a certain electric position of the BLDC motor (10), wherein the first phase and the second phase selected are the phases having the major induced voltage and the minor induced voltage at a certain electric position of the BLDC motor (10);
maintaining a third open phase to monitor the electric position of the BLDC motor (10) by means of monitoring the induced voltage at this third open phase; and
separating the rheostatic braking in six electric positions, each electric position being associated to two electric sections: a first section before zero crossing of the induced voltage of the third open phase; and a second section after the zero crossing.-
公开(公告)号：US12078159B2
公开(公告)日：2024-09-03
申请号：US17635685
申请日：2020-08-14
IPC分类号： F04B39/00
CPC分类号： F04B39/0061 , B32B2307/102
摘要： The present invention relates to a system for the thermal insulation of the suction muffler in compressors, said system being provided with a muffling device and a protection device, and being capable of optimizing the thermal insulation of the refrigerant fluid that will be compressed, making the operation of the compressor more efficient; and in the proposed system, the muffling device and the protection device are connected via connection regions that allow the formation of a gap between the devices, which improves the operation thereof.
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10.发明授权公开(公告)号：US12066016B2
公开(公告)日：2024-08-20
申请号：US17626426
申请日：2020-07-13
发明人： Emerson Moreira , Ricardo M. Doi , Sergio K. Lohn
CPC分类号： F04B39/0072 , F04B35/04 , F04B39/123 , F04B39/0027 , F04B39/0061 , F04B39/14 , F04B39/16 , F04B53/001 , F04B53/22
摘要： A reciprocating compressor is provided. The compressor includes at least one functional assembly integrated by at least one compression cylinder and at least one reciprocating piston; at least one electric motor capable of moving the reciprocating piston inside the compression cylinder; at least one set of valves capable of controlling the flow of fluid entering and leaving the compression cylinder, the valves being arranged in a head of the reciprocating compressor; at least one head cover capable of being arranged next to the head of the reciprocating compressor; and at least one suction acoustic filter integrated by at least one outlet pipe provided with at least one outlet path capable of being arranged next to the head of the reciprocating compressor. The suction acoustic filter is fastened to the head cover using a fastener.
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