| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | Distance protective relay using a programmable thermal model for thermal protection | US10650605 | 2003-08-28 | US07239496B2 | 2007-07-03 | Edmund O. Schweitzer, III; Gabriel Benmouyal; Michael B. Bryson |
| The system includes a distance protective relay for power lines which includes a logic capability which is responsive to settings entered into the relay by an end user to implement the value of those settings into stored thermal model equations which emulate the temperature of the power line conductor. The logic within the relay is organized and has the capability of receiving the setting values entered by the user and to use those in the logic equations to determine the temperature of the conductor. | ||||||
| 102 | Thermal Overload Protection | US10587574 | 2005-02-01 | US20070121259A1 | 2007-05-31 | Janne Kuivalainen; Peter Osterback |
| A thermal overload protection for an electrical device, particularly an electric motor (M), measures a load current supplied to the electrical device (M), and calculates the thermal load on the electrical device on the basis of the measured load current, and shuts off (S2) a current supply (L1, L2, L3) when the thermal load reaches a given threshold level. The protection comprises a processor system employing X-bit, preferably X=32, fixed-point arithmetic, wherein the thermal load is calculated by a mathematic equation programmed into the microprocessor system structured such that a result or a provisional result never exceeds the X-bit value. | ||||||
| 103 | Motor controller | US11483683 | 2006-07-11 | US20070035896A1 | 2007-02-15 | Shigeru Kobayashi; Seiichi Watanabe; Seiichi Tanaka |
| A motor controller is provided with: an estimated temperature calculating means that calculates an estimated temperature of a motor; and a control unit that can perform a driving control of the motor only when the estimated temperature is not larger than a predetermined value. A mode switching means switches the control unit and the estimated temperature calculating means between in a normal operation mode in which they can drive the motor and in a sleep mode in which electric power consumption thereof is smaller than in the normal operation mode in accordance with a predetermined condition while the motor is stationary. An activating means activates the estimated temperature calculating means in the sleep mode for a predetermined active time every time a predetermined sleep time is elapsed. | ||||||
| 104 | Control apparatus for automotive alternator having capability to accurately detect temperature of alternator | US11409001 | 2006-04-24 | US20060238172A1 | 2006-10-26 | Fuyuki Maehara; Kazuyuki Watanabe |
| A control apparatus for a vehicle generator includes a switch, a regulator, a fault condition detector, and a PWM signal generator. The switch is selectively turned on and off so as to intermittently excite the generator. The regulator controls on/off operation of the switch so as to bring an output of the generator into agreement with a target value. The fault condition detector detects a fault condition of the generator. The PWM signal generator generates and outputs a PWM signal that has a duty determined as a function of a duty of the on/off operation of the switch and a frequency determined based on if the fault condition of the generator is detected by the fault condition detector. Consequently, the control apparatus can inform an external control apparatus of the duty of the on/off operation of the switch and the fault condition of the generator with the single PWM signal. | ||||||
| 105 | Determining an operational limit of a power transmission line | US10499701 | 2002-12-11 | US07107162B2 | 2006-09-12 | Marek Zima; Christian Rehtanz; Mats Larsson |
| In a method, computer program and system for determining an operational limit of a power transmission line, time-stamped current phasor information and voltage phasor information for a first end and a second end of the line are determined, an ohmic resistance of the line is computed from the phasor information, and an average line temperature is computed from the ohmic resistance. This allows to determine the average line temperature without dedicated temperature sensors. The average line temperature represents the actual average temperature and is largely independent of assumptions regarding line parameters. | ||||||
| 106 | Electric machine | US10522606 | 2003-07-21 | US20060038539A1 | 2006-02-23 | Hakan Swahn; Bertil Svensson |
| A method and an apparatus are described for monitoring a rotating synchronous electric machine (9), which comprises a rotor winding and a stator having a stator winding. The method comprises the steps of determining the stator winding current, determining the stator winding voltage, determining the rotor winding current, and estimating the temperature in at least two positions in the electric machine (9) using a model of the electric machine and the determined current and voltage values. An apparatus according to the invention is provided for carrying out the method. | ||||||
| 107 | Controlled rectifier bridge, control system, and method for controlling rectifier bridge by disabling gate control signals | US10281701 | 2002-10-28 | US06998735B2 | 2006-02-14 | Irving A. Gibbs |
| A controlled rectifier bridge includes a plurality of segments each having an element responsive to a control signal, and an output having a voltage, a first current and a second current. Sensors provide sensed current values from first and second output currents from the bridge. A routine determines if the sensed current values are greater than a predetermined value. A regulator outputs the control signals to the segments in order to control current conduction within the segments. A routine determines if a circuit interrupter is open or if current is not flowing between bridge inputs and the corresponding alternating current phases. A routine disables the control signals to pairs of the segments when the sensed current values are greater than the predetermined value, and when the circuit interrupter is open or when current is not flowing between the inputs and the corresponding alternating current phases. | ||||||
| 108 | Combination-type motor control with extended current range | US10955705 | 2004-09-30 | US06995964B2 | 2006-02-07 | Roger Alan Plemmons; John Herman Blakely; Gregory A. Helton |
| A motor control technique is disclosed in which a first algorithm controls interruption of power to a motor in a first current range. A second algorithm controls interruption of power in a second, higher current range. The algorithms may be adapted to specific motor sizes, ratings or classes. The extended range may extend from a transition point (e.g., 6–10 times the FLC of the motor) to an upper limit. The upper limit may be determined based upon a current rating of an instantaneous trip device. | ||||||
| 109 | Nuisance trip reducing motor control system and method | US10954731 | 2004-09-30 | US20050270709A1 | 2005-12-08 | Roger Plemmons; John Blakely; Gregory Helton |
| A technique for reducing nuisance tripping is disclosed in which a desired limit temperature is determined for a component of a motor system. The limit is compared to actual temperature signals, or signals indicative of temperature of the component. The component may be the conductor or conductors providing power to the motor. A counter is augmented when the actual temperature exceeds the limit. The limit may be computed, such as based on a heating model. A trip signal is generated only when the actual temperature has exceeded the limit for a predetermined number of periods. The counter may be reset if the actual temperature drops below the desired limit. | ||||||
| 110 | COMBINATION-TYPE MOTOR CONTROL WITH EXTENDED CURRENT RANGE | US10955705 | 2004-09-30 | US20050270708A1 | 2005-12-08 | Roger Plemmons; John Blakely; Gregory Helton |
| A motor control technique is disclosed in which a first algorithm controls interruption of power to a motor in a first current range. A second algorithm controls interruption of power in a second, higher current range. The algorithms may be adapted to specific motor sizes, ratings or classes. The extended range may extend from a transition point (e.g., 6-10 times the FLC of the motor) to an upper limit. The upper limit may be determined based upon a current rating of an instantaneous trip device. | ||||||
| 111 | System and method to simulate and evaluate management algorithms of a panel or mobile window, activated by an electric motor, with anti-crushing security and programme for its execution | US10343026 | 2000-07-27 | US06882123B1 | 2005-04-19 | Daniel Guasch Murillo |
| A system and method to simulate and evaluate management algorithms of a panel or mobile window, activated by an electric motor, with anti-crushing security and a program for its execution.It includes a modular structure integrating a series of models representative of the electric parameters of the electric motor, mobile panel performance, incidence of a possible obstacle and an activation and control methodology implemented by means of a sequential state machine related to starting, stopping and/or motor displacement direction according to position and panel displacement direction and a module to evaluate an algorithm to be validated on introducing the current supplied to the motor and its angular speed and which analyzes said values and its temporary evolution and combinations between some or other values. Said models and modules are implemented in a high level programming language. | ||||||
| 112 | Detection of loss of cooling air to traction motors | US10755186 | 2004-01-08 | US06847187B2 | 2005-01-25 | Ajith Kuttannair Kumar |
| A thermal protection apparatus for an AC traction motor including a stator, a rotor, a blower fan and an inverter includes a method and apparatus for predicting the motor temperature assuming that the blower is operational. The method and apparatus also determines an estimated motor temperature by measuring the motor resistance or the rotor slip. The estimated motor temperatures compared to the predicted motor temperature to determine the condition of the motor cooling system. | ||||||
| 113 | Configurable interrupter for circuit overcurrent conditions | US10020828 | 2001-12-12 | US06765776B2 | 2004-07-20 | H. Edward Kelwaski |
| Electrical power distribution circuits for motor vehicles incorporate a switching element for controlling the energization of the circuits. Current metering elements associated with each switching element indicate the current drawn by the respective electrical circuits. A microcontroller is provided which provides an activation signal for the switching elements, often in accord with a pulse width modulated duty cycle. The microcontroller implements a circuit protective algorithm which takes as inputs the indication of current drawn by a particular electrical circuit and the duty cycle. An equivalent D.C. current is estimated for determining a heat index for a hypothetical fuse suitable for protecting the circuit. When the heat index exceeds the rating for the fuse the fuse melts. | ||||||
| 114 | Controlled rectifier bridge, control system, and method for controlling rectifier bridge by disabling gate control signals | US10281701 | 2002-10-28 | US20040080888A1 | 2004-04-29 | Irving A. Gibbs |
| A controlled rectifier bridge includes a plurality of segments each having an element responsive to a control signal, and an output having a voltage, a first current and a second current. Sensors provide sensed current values from first and second output currents from the bridge. A routine determines if the sensed current values are greater than a predetermined value. A regulator outputs the control signals to the segments in order to control current conduction within the segments. A routine determines if a circuit interrupter is open or if current is not flowing between bridge inputs and the corresponding alternating current phases. A routine disables the control signals to pairs of the segments when the sensed current values are greater than the predetermined value, and when the circuit interrupter is open or when current is not flowing between the inputs and the corresponding alternating current phases. | ||||||
| 115 | Apparatus and method for predicting an overload trip for an electrical power transformer | US10093967 | 2002-03-11 | US06727821B2 | 2004-04-27 | Mark Anthony Weekes; Robert George Coish; Zhiying Zhang; Glenn William Swift |
| An apparatus for monitoring and controlling the operation of an electrical power transformer includes a processor with input transducers for providing to the processor inputs indicative of electrical current in a winding of the transformer and ambient temperature outside the transformer. The processor is arranged using an algorithm based upon heat transfer to repeatedly calculate a first prediction, based upon the present values of electrical current and ambient temperature, of a time period before the hot spot temperature exceeds a pre-set allowable maximum and a second prediction, based upon the current value of power, of a time period before the accumulated loss of life exceeds a pre-set allowable maximum. If the shorter time period of the two calculations is less than a pre-set value, for example one half hour, the processor generates an alarm signal and a display counting down the time remaining in the period, together with a second alarm signal at a shorter second time of for example one quarter hour. | ||||||
| 116 | Electric starter device for an internal combustion engine | US09856893 | 2001-05-29 | US06668781B1 | 2003-12-30 | Wolfgang Seils; Manfred Ackermann |
| The invention relates to an electric starter for an internal combustion engine, having a thermal monitoring protector (4) for turning the starter (1) off when its limit operating temperature is reached. The starter is characterized by a device (5) for ascertaining a virtual operating temperature (TV); the device (5) ascertains the virtual operating temperature (TV) as a function of at least one operating parameter that affects the operating temperature of the starter (1). | ||||||
| 117 | Method and arrangement for ascertaining state variables | US09700204 | 2000-11-13 | US06609079B1 | 2003-08-19 | Walter Seitlinger |
| In a method for ascertaining temperatures (tqm, tqh, tom, tok) in an oil-cooled transformer, the transformer terminal voltages (2), the winding currents (3) and the ambient temperature (6) are measured. Furthermore, the status (5) of fans and pumps and the switch position (4) of a stepping switch are established. The measured and established variables (2, 3, 4, 5, 6) are fed to a thermohydraulic model (7), in which state variables (19) are calculated with auxiliary variables (9), which are losses (10) in the transformer, heat transfer parameters (11), flow resistances (13) and the oil flow (12), and a hydraulic network of the oil circuit, which has branches and nodes. The state variables (19) are the average temperatures (tqm) and the hotspot temperatures (tqh) in loss-producing parts of the transformer and the average oil temperatures in branches (tom) and in nodes (tok) of the hydraulic network of the oil circuit. When there is a change in the variables measured and established (2, 3, 4, 5, 6), the auxiliary variables (9) are adapted appropriately, and the rate of change of the state variables (19) is subsequently ascertained and new state variables (19) are consequently calculated. With this method, temperatures (tqm, tqh, tom, tok) and their changes in the transformer are ascertained without temperature sensors, whereby the optimum operation of the transformer is ensured, an early detection of errors and risks takes place and the optimum point in time for service work can be established. | ||||||
| 118 | Apparatus for preventing thermal damage to an electrical power transformer | US09617761 | 2000-07-17 | US06424266B1 | 2002-07-23 | Mark Anthony Weekes; Robert George Coish; Zhiying Zhang; Glenn William Swift |
| An apparatus for monitoring and controlling the operation of an electrical power transformer includes a processor with input transducers for providing to the processor inputs indicative of electrical current in a winding of the transformer and ambient temperature outside the transformer. The processor is arranged using an algorithm based upon heat transfer to repeatedly calculate a first prediction, based upon the present values of electrical current and ambient temperature, of a time period before the hot spot temperature exceeds a pre-set allowable maximum and a second prediction, based upon the current value of power, of a time period before the accumulated loss of life exceeds a pre-set allowable maximum. If the shorter time period of the two calculations is less than a pre-set value, for example one half hour, the processor generates an alarm signal and a display counting down the time remaining in the period, together with a second alarm signal at a shorter second time of for example one quarter hour. | ||||||
| 119 | Motor driving control device | US09651733 | 2000-08-30 | US06339310B1 | 2002-01-15 | Masanori Sugiyama; Hiroyuki Inagaki; Yoshihide Suzuki |
| A motor driving control device that achieves as high as possible phase coil energization level while preventing thermal destruction of the power switching element by using precise thermal detection of a portion of the power switching element inside a switching module of the control device. An electric power loss Lt at the switching element is used for calculating a saturation temperature Tjgoal. On the basis of the saturation temperature, Tjgoal, and a time constant &tgr; of temperature rise, an instant junction temperature Tjnow is calculated. A difference Error between the instant junction temperature Tjnow and an upper temperature limit value Tjmax is calculated. In a motor locked condition, a coefficient Kt is calculated for the target torque, the target torque being equal to the required torque multiplied by Kt. Kt is based on the Error for calculating the target torque. If Error is greater than or equal to a predetermined value, K3, Kt is set to be 1, even if Kt is in excess of 1. If Error is less than or equal to 0 , Kt is set to be zero. | ||||||
| 120 | Electronic trip device that detects an imminent drop of the power system voltage and comprises a numerical processing circuit and a thermal memory | US902002 | 1997-07-29 | US5850330A | 1998-12-15 | Patrick Perron; Hong Nguyen |
| The electronic trip device with a thermal memory including a capacitor and a charging resistor arranged in parallel. In normal operation, the capacitor is permanently charged by a supply voltage supplied by the power system to be protected. The trip device includes a processing circuit which performs tripping functions after calculation of a thermal value representative of the thermal state of the power system and detects an imminent drop of the supply voltage. When such a drop is detected, the processing circuit orders discharging of the capacitor until the voltage at the terminals of the capacitor is representative of the calculated numerical value. | ||||||
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