| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 361024000 | Current and temperature | 10 |
| 20080266728 | System to Control, Protect and Monitor the Status of Forced Cooling Motors for Power Transformers and Similar - System to control, protect and monitor the status of forced cooling motors for power transformers and similar, is preferably applied to power transformers and auto-transformers, and this system turns conventional ( | 10-30-2008 |
| 20100039736 | Protective circuit for protection of an appliance, in particular an electric motor,against thermal overloading - At least one embodiment of the invention relates to a protective circuit for protection of an appliance, in particular of an electric motor, against thermal overloading. In at least one embodiment, the protective circuit includes a first and a second terminal for connecting a temperature detection element; a detection unit for detecting whether a resistance value of the temperature detector element which is connected between the first and the second terminals, is in a first or a second resistance range; a short-circuit detector for identifying whether there is a short circuit between the first and the second terminals; signaling outputs for emitting signal messages to an evaluation unit when the detected resistance value is in the second resistance range and/or when a short circuit has been identified by the short-circuit detector; and a third terminal, which is connected to the second terminal via a predetermined resistance. | 02-18-2010 |
| 20110019318 | ELECTRICAL SWITCHING APPARATUS AND PROTECTION APPARATUS DETERMINING THERMAL AGE OF ANOTHER APPARATUS OR A NUMBER OF INSULATORS - An electrical switching apparatus is for another apparatus including a number of insulators, a number of temperature sensors operatively associated with the number of insulators, and a number of conductors operatively associated with the number of insulators. The electrical switching apparatus includes a number of separable contacts, an operating mechanism structured to open and close the separable contacts, a number of sensors structured to sense a number of currents flowing through the separable contacts and through the conductors, a processor structured to input the sensed currents from the sensors, and an output. The processor calculates at least one of: (a) a thermal age of the other apparatus from a number of sensed temperatures from the temperature sensors, and (b) the thermal age of the other apparatus from the sensed currents. The output includes the thermal age of the other apparatus. | 01-27-2011 |
| 20120014019 | METHOD OF OPERATING A HOUSEHOLD APPLIANCE - In a method for operating a household appliance having at least one electrical consumer activated by power electronics an actual value representing a temperature loading of the power electronics is determined and compared with a limit value representing a maximum tolerable temperature loading of the power electronics in normal load operation. When the actual value is below the limit value; an overload operation is enabled at least temporarily with a higher power than in normal load operation. | 01-19-2012 |
| 20130088799 | Asset Condition Monitoring in an Electric Motor - The motor monitoring system of the present disclosure uses several calculated monitoring values to determine a status of a motor and take a predetermined action when a threshold corresponding with the monitoring value is exceeded. The threshold may be calculated by an intelligent electronic device (IED) monitoring the motor. The predetermined action may include further monitoring of the motor. The predetermined action may include monitoring equipment not directly monitored by the IED. | 04-11-2013 |
| 20130120881 | SYSTEMS AND METHODS FOR PROTECTING THREE-PHASE MOTORS - A three-phase electric motor of a compressor receives first, second, and third phases from a three-phase power supply. A method for protecting the motor includes, using a line break protector, disconnecting the motor from only the first phase in response to a temperature being greater than a predetermined temperature threshold. The method also includes measuring a first current flowing through the line break protector, and determining a current value based on the first current independent of current in the second and third phases. The method further includes disconnecting the motor from the first, second, and third phases in response to the current value being less than or equal to a predetermined threshold. | 05-16-2013 |
| 20130176649 | SYSTEM AND METHOD FOR COMPRESSOR MOTOR PROTECTION - 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. | 07-11-2013 |
| 20130271880 | PROTECTION CIRCUIT FOR FAN - A protection circuit includes first and second field-effect transistors (FETs), a bipolar junction transistor, first to sixth resistors, and a first capacitor. The protecting circuit is connected between a power supply unit and a fan, for powering on or powering off the fan. | 10-17-2013 |
| 20140313621 | SELF PROTECTED DYNAMIC BRAKING - An apparatus for dynamic braking is disclosed. The apparatus includes a first switch connected to a first connection of a dynamic braking resistor and to a first power bus of a motor controller. The apparatus includes a second switch connected to a second connection of the dynamic braking resistor and to a second power bus of the motor controller. The motor controller provides power to and controls a motor. The apparatus includes a switch control module that controls the first and second switches to connect the dynamic braking resistor to the first and second power buses. The switch control module controls the first and second switches in response to a signal from the motor controller. | 10-23-2014 |
| 20150029620 | SYSTEM AND METHOD FOR CONTROLLING THE POWER SUPPLY OF AN ELECTRIC MACHINE ON THE BASIS OF THE TEMPERATURE THEREOF - A control system for controlling power supply of an electric machine of an automobile and which contributes to movement thereof, wherein the control system is connected, at an input thereof, to a mechanism estimating a temperature of a rotor of the electric machine and to a temperature sensor measuring a temperature of a stator of the electric machine. The control system includes mappings of a set of values for allocating supply currents of the electric machine on the basis of torque and rotational speed request values received at the input of the control system, and includes a switching mechanism for selecting the mapping, the supply current signals of which are transmitted to the electric machine, on the basis of the signals from the mechanism estimating the temperature of the rotor and from the stator-temperature sensor. | 01-29-2015 |
