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US20120274256 COOLED MOTOR  
A motor having a first portion configured to turn in a forward direction, a second portion coaxially mirrors the first portion; and a central fan between the first and second portions, and forcing...
US20140210392 METHOD AND APPARATUS FOR CONTROLLING AN ELECTRIC MOTOR EMPLOYED TO POWER A FLUIDIC PUMP  
An electric motor powers a fluidic pump fluidly connected to a hydraulic circuit. Operating the electric motor includes determining a heat transfer coefficient for the electric motor based upon a...
US20140262354 Fire-Extinguishing System and Method for Operating Servo Motor-Driven Foam Pump  
Embodiments of the invention provide a fire-extinguishing system and method for injecting foamant into a stream of water. The system can include a flow meter determining a flow rate of the stream...
US20110056707 Fire-Extinguishing System and Method for Operating Servo Motor-Driven Foam Pump  
Embodiments of the invention provide a fire-extinguishing system and method for injecting foamant into a stream of water. The system can include a flow meter determining a flow rate of the stream...
US20150022133 Circuit for Thermal Protection and Power Regulation of Electric Motors  
A circuit for thermal protection and power regulation as a function of the current winding temperature of phase windings of an electric motor. The circuit including at least one temperature...
US20110095716 MOTOR DRIVER FOR MACHINE TOOL WITH FAN MOTOR  
A motor driver for a machine tool, which comprises a fan motor, configured to drive a cooling fan for cooling a radiator or the interior of the motor driver, estimates a rate of heat release...
US20110247652 DEVICE AND METHOD FOR CONTROLLING AN ELECTRIC MOTOR  
The invention relates to a method and a device for controlling an electric motor (2), wherein an operating voltage and an operating current is supplied to an electric motor (2), and at least one...
US20110084638 METHODS, SYSTEMS AND APPARATUS FOR DYNAMICALLY CONTROLLING AN ELECTRIC MOTOR THAT DRIVES AN OIL PUMP  
Methods, system and apparatus are provided for sensorless control of a vector controlled motor drive system that includes an electric motor used to drive an auxiliary oil pump.
US20150263509 ROTOR TEMPERATURE DETECTING DEVICE IN AN ELECTRIC MOTOR AND OVERHEAT PROTECTION DEVICE OF AN ELECTRIC MOTOR  
A rotor temperature detecting device in an electric motor of the present invention includes: a power calculator configured to calculate power of an electric motor; a rotational speed detector...
US20150102756 CONTROLLER AND CONTROL METHOD FOR MACHINE TOOL CAPABLE OF CHANGING MOTION DEPENDING ON MOTOR TEMPERATURE  
A controller and a method for a machine tool, capable of discriminating the factors in overheating, and taking appropriate measures depending on each factor. A first amplifier of the controller...
US20140197769 OVER TEMPERATURE PROTECTION DEVICE FOR ELECTRIC MOTORS  
An over temperature protection device for electric motors applicable to a railway vehicle driving system that operates a plurality of electric motors in parallel using one or a plurality of...
US20110057594 METHODS AND SYSTEMS FOR DETERMINING AND DISPLAYING A TIME TO OVERLOAD OF MACHINE TOOLS  
Systems and methods for determining and displaying a time to overload of a motor in a computer numerical controlled (CNC) machine tool are provided. A method includes monitoring a fuse level of a...
US20110057595 Method of Controlling a Motor  
Embodiments of the invention provide methods of controlling a motor, such as a servo motor. One method can include monitoring a current temperature of the motor and a power stage of the motor...
US20140265977 HYBRID INDUSTRIAL VEHICLE  
A hybrid industrial vehicle (1) has as a main configuration: an engine (2); a cargo handling generator motor (3) used for cargo handling; a cargo handling apparatus (4) that can be driven by power...
US20110241458 STATOR COIL COOLANT FLOW REDUCTION MONITORING  
A coolant flow reduction monitoring system for a rotary electric machine having stator coils within a plurality of slots of a stator thereof is provided. The stator coils are cooled by a coolant...
US20110213518 SYSTEMS AND METHODS FOR MANAGING TORQUE CAPABILITY IN ELECTRIC MOTOR SYSTEMS  
A method for operating an electric motor is provided. The method includes receiving a torque request; determining long term torque capabilities and short term torque capabilities of the electric...
US20140350762 METHOD AND DEVICE FOR TEMPERATURE-DEPENDENT CONTROL OF AN ELECTRIC MOTOR  
An apparatus for temperature-dependent control of an electric motor, includes a control device for adjusting the power output of the electric motor, and means for detecting the temperature of a...
US20140340016 POWER SUPPLY COMPENSATION FOR AN ACTUATOR  
A mechanism for compensating power to a motor or actuator. Compensation may counter the effects of changing voltage levels of power to the motor and varying temperatures at the motor. An output of...
US20120133313 System And Method For Estimating A Generator Rotor Temperature In An Electric Drive Machine  
An electric drive machine includes an electric drive system including an internal combustion engine and an electrical power generator coupled to the internal combustion engine. An electronic...
US20130271060 Motor Winding Heater Systems and Methods  
A motor controller includes a motor winding heater function. The motor controller applies a predefined current to one or more of the motor windings without the use of additional dedicated motor...
US20090136243 Motor Controller and Printer  
A motor controller is provided. The motor controller includes a motor drive unit that drives a plurality of motors; a thermal shutdown unit that is provided in the motor drive unit and that stops...
US20140009095 CONTROL OF A BRUSHLESS MOTOR  
A method of controlling a brushless motor that includes sensing a temperature and using the sensed temperature to define a current limit. A lower current limit is then defined for a lower sensed...
US20100117580 Rechargeable electric power tool  
In a rechargeable electric power tool, upon changeover of a trigger switch, a microcomputer determines the magnitude relation between the detected temperature outputted from the first thermistor...
US20130069579 MOTOR WINDING OVERHEAT PREVENTION APPARATUS AND MOTOR CONTROL APPARATUS  
A winding overheat prevention apparatus comprises: a stator winding temperature calculation unit which calculates winding temperature based on the ambient temperature of the motor and on the...
US20120299520 PREDICTIVE THERMAL PROTECTION FOR MOTORS IN BARRIER OPERATOR SYSTEMS  
Disclosed are alternate embodiments of various components of a barrier operator system. and methods of operation, including of the mechanical drive subsystem with segmented and self-locking rail...
US20140191696 ROTATING ELECTRIC MACHINE AND METHOD FOR CONTROLLING THE ROTATING ELECTRIC MACHINE  
A rotary electric machine includes a rotor that is arranged such that an axis of rotation of the rotor extends in a horizontal direction, a stator that is provided with an coil end on which...
US20120097783 COMMUNICATIONS SPOOLER FOR A MOBILE ROBOT  
A cable handling system mounted to a mobile robot to dispense and retrieve cable at zero tension includes a cable reel drive and a downstream tension roller drive that includes an idler. As a...
US20120274257 Motor Control System  
A motor control system has a sensor for measuring an operational parameter of a motor and includes means for converting the measured operational parameter into an electrical resistance value. The...
US20110001443 SYSTEM FOR MEASURING FAN ROTATIONAL SPEED  
A system is used to measure a fan rotational speed. The system includes a main controller, a first socket coupled to the linear fan, a second socket connected to the main controller, and an...
US20120146563 ARRANGEMENT HAVING AN ELECTRIC MACHINE AND METHOD FOR OPERATING AN ELECTRIC MACHINE  
The invention relates to a method and arrangement having an electric machine, comprising a stator (4) and a rotor (1) and an infrared temperature sensor, wherein the detection field of the...
US20070296288 Hermetic motors with windings directly coupled to on-winding motor protectors  
A hermetic motor includes a stator having at least one winding formed by a winding wire, and an on-winding motor protector having at least one contact. To improve the reliability and reduce the...
US20140265656 ELECTRIC MACHINE INCLUDING A TEMPERATURE SENSING SYSTEM  
An electric machine includes a housing, a stator including stator windings mounted to the housing, a rotor supported in the housing and configured to rotate relative to the stator, a temperature...
US20110144843 PERMANENT MAGNET TEMPERATURE ESTIMATION  
A method of controlling a vehicle including a permanent magnet (PM) synchronous motor is provided. The motor is controlled based on direct-axis (d-axis) and quadrature-axis (q-axis) current...
US20110095717 METHOD OF AND APPARATUS FOR CONTROLLING OIL TEMPERATURE INCREASE FOR ELECTRIC VEHICLE AND ELECTRIC VEHICLE  
An electric vehicle employs an oil commonly used as a lubricating oil for gears and a coolant for a motor and is propelled by transmitting the rotational torque of the motor to wheels through the...
US20110279074 ELECTRIC MOTOR STATOR WINDING TEMPERATURE ESTIMATION SYSTEMS AND METHODS  
An electric motor system includes an electric motor comprising a stator with windings and a rotor configured to operate at a motor speed; a cooling system comprising coolant configured to cool the...
US20110101904 Overheat Protection Apparatus  
An apparatus which estimates the temperatures of a motor without using a temperature sensor can achieve overheat protection by proper control. In an example, a heat generation amount calculation...
US20110169439 MINIMUM TEMPERATURE CONTROL FOR ELECTROMECHANICAL ACTUATOR  
A component intended for use in very low temperature situations has an electromechanical actuator with a control for an electric motor. The control receives a temperature signal indicative of a...
US20140203748 MOTOR CONTROL DEVICE AND MOTOR CONTROL METHOD  
There is provided a motor control device for an actuator having a motor, including a measuring unit configured to measure a temperature of the actuator or a temperature corresponding to the...
US20140354204 CONTROL DEVICE AND CONTROL METHOD FOR PERMANENT MAGNET MOTOR  
A control device for a permanent magnet motor, including: a rotor position detector configured to detect a rotating speed of a rotor of a permanent magnet motor in a state in which the permanent...
US20120293102 METHOD AND SYSTEM FOR HEATING OF ROBOTS IN COLD ENVIRONMENTS  
A method and system are disclosed for heating of robots in cold environments, whereby the robot possesses permanent magnet brushless or three-phase synchronous motors with three motor phases...
US20090115269 ELECTRIC MOTOR CONTROL WITH BUCK BOOST CONVERTER  
A power supply for an electric motor includes a converter that can increase and decrease a voltage supplied into an inverter and then into the stator windings of the motor. As a separate feature,...
US20100117581 Rechargeable electric power tool  
A rechargeable electric power tool includes a motor driven by a secondary battery, a switching element for regulating power distribution to the motor, a motor control unit for controlling rotation...
US20120194118 Methods and Systems Involving Electric Machine Controllers  
A method for operating a controller includes receiving a first accumulated thermal value of an electrical machine and an associated first time stamp from a memory, initializing a processor of the...
US20130285587 ELECTRIC POWER STEERING CONTROL DEVICE  
A electric power steering control device equipped with a motor having a resolver detection unit comprises: an ambient temperature detecting means (33) for detecting ambient temperature around a...
US20140265978 MOTOR CONTROL DEVICES AND METHODS  
A system and method for preventing thermal damage to an electric motor in a vehicle includes arrangements for monitoring the motor and detecting a cycle of the motor. If the cycle occurred within...
US20140171330 ELECTRIC MACHINE  
The invention relates to an electric machine (101) comprising a stator (103), a rotatably mounted rotor (105) having a magnetizable and coolable rotor section (107) made of a super-conducting...
US20140125268 METHOD AND DEVICE FOR OPERATING AN ELECTRICAL MACHINE HAVING SEPARATE EXCITATION  
A method and a device for operating an electrical machine having separate excitation, especially a synchronous machine. With the aid of a sensor system, a variable characterizing a rotor...
US20150194805 NUMERICAL CONTROL APPARATUS  
To avoid overheating of a spindle motor as easy as possible, a numerical control apparatus measures a cycle time in machining a work (step S5), measures a current amount per unit cycle flowing to...
US20140225550 WHEEL ASSEMBLY DEFINING A MOTOR/GENERATOR  
The present document describes a wheel assembly defining a motor/generator. The wheel assembly comprises a plurality of stator units coaxially provided within a rotor. The stator units comprise a...
US20100141186 ELECTRIC TOOL AND DEVICE SWITCH FOR AN ELECTRIC TOOL  
The invention relates to a device switch for an electric tool, in particular a battery-operated electric tool. A power circuit for supplying power of a motor and an electronic circuit for...

Matches 1 - 50 out of 111 1 2 3 >