| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | SYSTEM AND METHOD FOR COMPRESSOR MOTOR PROTECTION | US14617451 | 2015-02-09 | US20150155701A1 | 2015-06-04 | Frank S. Wallis; Joseph James Rozsnaki |
| A refrigerant compressor includes an electric motor. A current sensor measures current flow to the electric motor. A switching device is configured to close and open to allow and prevent current flow to the electric motor, respectively. A maximum continuous current (MCC) device includes a stored digital value corresponding to a maximum continuous current for the electric motor. A motor protection module: communicates with the MCC device, the current sensor, and the switching device; determines a first MCC for the electric motor as a function of the stored digital value received from the MCC device; selectively sets a predetermined MCC to the first MCC; and controls the switching device based on a comparison of the current flow to the electric motor and the predetermined MCC. | ||||||
| 82 | System and method for compressor motor protection | US13737566 | 2013-01-09 | US08964338B2 | 2015-02-24 | Frank S. Wallis; Joseph James Rozsnaki |
| A system includes a refrigerant compressor including an electric motor, a current sensor that measures current flow to the electric motor, a switching device configured to close and open to allow and prevent current flow to the electric motor, respectively, a maximum continuous current (MCC) device that includes a resistance corresponding to a maximum continuous current for the electric motor, and a motor protection module. The motor protection module communicates with the MCC device, the current sensor, and the switching device and determines a first MCC value for the electric motor as a function of the resistance of the MCC device. The motor protection module also selectively sets a predetermined MCC to the first MCC and controls the switching device based on a comparison of the current flow to the electric motor and the predetermined MCC. | ||||||
| 83 | Pumping system and method of operation | US11919535 | 2006-04-13 | US08753095B2 | 2014-06-17 | Simon Harold Bruce |
| A pumping system includes a pumping mechanism, a motor for driving the pumping mechanism, a device for supplying power of a variable frequency to the motor, a control device for setting a maximum value for a current in the motor, and a device for supplying to the control device data indicative of the temperature of gas exhaust from the pumping mechanism and a temperature of the stator of the pumping mechanism, wherein the control device is configured to use the received data to adjust the maximum value during operation of the pumping system. | ||||||
| 84 | STATE OF CHARGE ADJUSTED COMPRESSOR CONTROL | US13246143 | 2011-09-27 | US20120316713A1 | 2012-12-13 | David J. Pfefferl; Mark A. Matko; Marv Hamdan |
| The described systems and methods relate to employing an Electric Air Charging System (EACS) to maintain a hybrid commercial vehicle (or the like) battery within a desired range of charge. The innovation facilitates reducing battery charge when the state of charge is too high, such as by adjusting air compressor cut-in and cut-out pressure thresholds to cause the air compressor to compress air for the brake system when there is excess charge in the battery, as well as triggering a brake regeneration protocol and/or other charge regeneration protocol(s) to restore charge to the battery when the state of charge of the battery is too low. | ||||||
| 85 | CURRENT CONTROL VIA SPEED CONTROL FOR DRIVING SCREW COMPRESSOR UNDER COLD CONDITIONS | US13165019 | 2011-06-21 | US20120315151A1 | 2012-12-13 | Marv Hamdan |
| When starting a screw-type air compressor in sub-zero conditions, current spikes are mitigated by detecting an over-current condition and/or a below-threshold temperature, and a warm-up routine is initiated in which compressor motor speed is ramped in a sawtooth fashion between two speeds that are substantially lower than a nominal operating speed of the compressor motor. In this manner, the internal components of the compressor are warmed prior to fully starting the compressor, which mitigates current spikes, reduces blown fuses, and extends the life of the compressor motor and other compressor components. | ||||||
| 86 | PUMP ASSEMBLIES WITH FREEZE-PREVENTIVE HEATING | US13402047 | 2012-02-22 | US20120211093A1 | 2012-08-23 | David J. Grimes |
| Pumps are disclosed that include a pump housing and at least one movable pumping element situated in the housing. The pumping element(s) are magnetically driven by magnetically coupling an external magnet driver (e.g., a stator) to a driven magnet located in the housing. A control circuit selectively operates the stator and a heat-producing element, so as to energize the heat-producing element especially in a potential freezing condition when the pump is not being otherwise operated. Thus, the fluid in the pump is prevented from freezing, and freeze-related pump damage is avoided. The heat-producing element can be the stator itself energized differently from when the stator is used for driving the pump. | ||||||
| 87 | VANE PUMP APPARATUS AND LEAK CHECK SYSTEM HAVING THE SAME | US13210731 | 2011-08-16 | US20120047999A1 | 2012-03-01 | Tomohiro ITOH; Mitsuyuki Kobayashi; Shinji Sugihara |
| An ECU determines whether condensed water is present at a rotor and vanes based on an electric current, which flows in an electric motor that drives the rotor. When the condensed water is determined to be present, the ECU drives the motor for a predetermined time period. When the condensed water is determined to be absent, the ECU stores a pressure, which is sensed through a pressure sensor, as a first pressure. The ECU is adapted to sense an abnormality in a pump characteristic based on a value of the first pressure. | ||||||
| 88 | Inverter-Integrated Electric Compressor | US13128140 | 2009-11-06 | US20110211981A1 | 2011-09-01 | Atsushi Saito; Makoto Shibuya; Kazumi Ohsato; Tadashi Kuribara |
| Provided is an inverter-integrated electric compressor excellent in joining strength and joining reliability at electrical joint. An inverter-integrated electric compressor wherein a motor is incorporated and a motor drive circuit including the inverter is surrounded by a compressor housing, characterized in that a bus bar joint section at which bus bars are electrically joined together is provided in the motor drive circuit, and a tip of at least one of the bus bars, the tip being located at the bus bar joint section, is split into small joining sections. | ||||||
| 89 | Control system and method for protection against breakage of lubricanting-oil film in compressor bearings | US11815781 | 2006-04-27 | US07959414B2 | 2011-06-14 | Marcos Guilherme Schwarz; Roberto Andrich; Fabio Henrique Klein |
| The present invention relates to a control system for protection against breakage of the lubricating-oil film in the bearings of hermetic compressors, as well as to a control method that has the objective of guaranteeing that a variable-capacity compressor should be maintained above a minimum rotation in order to prevent the oil film close to the respective bearing from breaking. One of the forms of achieving the objectives of the present invention is by means of a control system for protection against break of the lubricating-oil film in bearings of hermetic compressors, a microprocessor (10) actuating a set of switches (SW2M) selectively, so as to generate a rotation at the motor-compressor assembly (20, 21), the compressor (21) having a minimum rotation (RPMmin) of the compressor (21) so that the oil film will not be broken. | ||||||
| 90 | COMPRESSOR DIAGNOSTIC SYSTEM | US12652826 | 2010-01-06 | US20100101250A1 | 2010-04-29 | Nagaraj Jayanth; Hung Pham |
| A system is provided and may include logic circuitry in communication with an intelligent device. The logic circuitry may process a refrigeration system operating parameter as a function of time and at least one of the logic circuitry and the intelligent device may diagnose a refrigeration system status based on the processing. The intelligent device may output the diagnosis. | ||||||
| 91 | OPERATION CONTROL DEVICE AND METHOD OF VACUUM PUMPS | US11853942 | 2007-09-12 | US20080063534A1 | 2008-03-13 | Takamitsu Nakayama; Kazuaki Satoh |
| An operation control devices and operation methods thereof so as to eliminates the difficulties in such a case of introduction of vacuum sensors and/or inverter control is disclosed. The disclosure relates to a control of plural sets of vacuum pumps. In order to comply with the subjects to overcome the difficulties, the disclosure proposes to utilize current detection approach instead of direct pressure detection approach, while showing how to estimate a vacuum degree achieved under the operation of the pumps as well as presenting a method on the control of the number of pumps. It is also described how organically a current detecting device, a vacuum degree estimating device, a working pump control device and related methods to satisfy the subjects are linked. The usefulness of the disclosure is also revealed. | ||||||
| 92 | Compressor diagnostic system for communicating with an intelligent device | US10625979 | 2003-07-24 | US07313923B2 | 2008-01-01 | Nagaraj Jayanth; Hung Pham |
| A compressor includes a motor protector which stops the compressor motor when it senses an out of specification condition. A diagnostic system monitors the status of the motor protector and includes logic circuitry that diagnoses the type of problem the compressor or the system is having based upon the running times and status of the motor in conjunction with the times and status of the tripped motor protector. The diagnostic system also includes either a discharge pressure sensor or a condenser temperature sensor, an ambient air sensor and a voltage sensor. The sensors provide information to the diagnostic system, which enable it to determine where a system fault has occurred. | ||||||
| 93 | Compressor diagnostic method | US11201488 | 2005-08-11 | US07162883B2 | 2007-01-16 | Nagaraj Jayanth; Hung Pham |
| A method includes determining base-line operating parameters for a compressor, generating a high-side signal indicative of high-side compressor operating conditions, generating a low-side signal indicative of low-side compressor operating conditions, and comparing the high-side and low-side signals to the base-line operating parameters to determine a system operating condition. | ||||||
| 94 | Cooling fan for a screw compressor drive motor | US10452286 | 2003-06-03 | US07033144B2 | 2006-04-25 | Shoji Yoshimura; Hajime Nakamura |
| A oil-cooled type screw compressor of the present invention includes a compressor main unit storing a pair of male and female screw rotors driven by a motor and meshing with each other, a cooling fan provided independently to the motor for blowing air toward the motor, and control means for receiving a detected temperature signal from a temperature detector for detecting the coil temperature of the motor, and conducting control for increasing/decreasing the fan rotation speed of the cooling fan according to the coil temperature so as to maintain the coil temperature within a permissible range. It is possible to use the coil current of the motor or the motor rotation speed and the discharge pressure in place of the detected temperature signal. This constitution provides a screw compressor which offers fan-removed heat quantity not excessive or insufficient with respect to the motor heat generation quantity, and realizes sufficient cooling for the motor, and energy saving. | ||||||
| 95 | Compressor diagnostic system | US11294720 | 2005-12-06 | US20060080978A1 | 2006-04-20 | Nagaraj Jayanth; Hung Pham |
| A system and method for diagnosing and protecting a compressor includes a sensor, logic circuitry, a motor protector and an intelligent device. The logic circuitry is associated with the sensor and the motor protector and operable to determine a trip frequency of the motor protector and identify a specific fault cause. The intelligent device communicates with the logic circuitry and indicates the fault cause. | ||||||
| 96 | Compressor diagnostic system | US10822821 | 2004-04-12 | US20040187502A1 | 2004-09-30 | Nagaraj Jayanth; Hung Pham |
| A system includes a compressor receiving fluid from a low-pressure side of a circuit and outputting fluid to a high-pressure side of the circuit. The system also includes a motor drivingly connected to the compressor, at least one high-side sensor operable to measure fluid properties of the high-pressure side of the circuit, at least one current sensor operable to monitor a current drawn by the motor, and processing circuitry receiving fluid property and current information from the at least one high-side sensor and the at least one current sensor and processing the information to determine a system operating condition. | ||||||
| 97 | Method and system for diagnosing a cooling system | US10281906 | 2002-10-28 | US06758051B2 | 2004-07-06 | Nagaraj Jayanth; Hung Pham |
| A cooling system includes a compressor having a motor protector which stops the compressor's motor when it senses an out of specification condition. A diagnostic system of the cooling system monitors the status of the motor protector. The diagnostic system includes logic circuitry that diagnoses the type of problem the compressor or the system is having based upon the running times and status of the motor in conjunction with the times and status of the tripped motor protector. The diagnostic system also includes either a discharge pressure sensor or a condenser temperature sensor, an ambient air sensor and a voltage sensor. The sensors provide information to the diagnostic system to enable it to determine and indicate a system fault. | ||||||
| 98 | Method for operation control of vacuum pump and control system for vacuum pump | US10300064 | 2002-11-20 | US20030123990A1 | 2003-07-03 | Shinya Yamamoto; Masahiro Kawaguchi; Osamu Uchiyama |
| A vacuum pump has an alternating current motor, a rotary shaft and a gas transferring body. The alternating current motor runs at a certain speed based on frequency of alternating current and is sufficiently supplied with the alternating current. Gas is transferred from a certain space by the gas transferring body driven by the alternating current motor through the rotary shaft. A method for controlling a vacuum pump includes keeping a rotational speed of the alternating current motor at a second predetermined rotational speed, detecting a value of the alternating current to the alternating current motor, keeping the rotational speed at a first predetermined rotational speed that is higher than the second predetermined rotational speed when the detected alternating current value exceeds a first predetermined value, and keeping the rotational speed at the second predetermined rotational speed when the detected alternating current value becomes equal to a second predetermined value. | ||||||
| 99 | Compressor diagnostic system | US09990566 | 2001-11-21 | US20020170299A1 | 2002-11-21 | Nagaraj Jayanth; Hung Pham |
| A refrigeration/air conditioning system includes a compressor having a motor protector which stops the compressor's motor when it senses an out of specification condition. A diagnostic system of the refrigeration/air conditioning system monitors the status of the motor protector. The diagnostic system includes logic circuitry that diagnoses the type of problem the compressor or the system is having based upon the running times and status of the motor in conjunction with the times and status of the tripped motor protector. The diagnostic system also includes either a discharge pressure sensor or a condenser temperature sensor, an ambient air sensor and a voltage sensor. The sensors provide information to the diagnostic system which enables it to determine where a system fault has occurred. | ||||||
| 100 | Micro-processor control of compression ratio at full load in a helical screw rotary compressor responsive to compressor drive motor current | US659039 | 1984-10-10 | US4519748A | 1985-05-28 | David A. Murphy; Peter C. Spellar |
| An axial flow helical screw type compressor has a slide valve member and slide stop member mounted end to end beneath the intermeshing rotors such that the slide valve member controls communication between the work chamber defined by the rotors and the casing to the outlet port and the slide stop member and the valve member together control the working fluid inlet to the bores of the rotors, the slide valve member and the slide stop being independently movable. Control means for the slide valve member and slide stop include position sensing means for these two members, inlet and outlet pressure sensing means, and means for feeding these inputs into programmable circuitry to control the positions of the slide member and slide stop. Additional control means senses the occurrence of full load operation and then causes the slide valve member and slide stop member to move as a closed unit in a given direction, or the reverse, as the compressor drive motor current is sensed, continuously seeking the position at which such current is at a minimum. | ||||||
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