Matches 1 - 50 out of 156 1 2 3 4 >

AcclaimIP-ad

Match Document Document Title
US20110025370 Method and System for Testing Yawing System for Wind Turbine  
A system and method is provided for ground testing of a yaw system of a nacelle (3) prior to erection of a wind turbine (1). A portable transformer box (10) is provided which will allow the...
US20140257722 PREDICTING MOTOR FAILURE BASED ON RELATIONSHIP OF MOTOR PAIR CHARACTERISTICS  
A system and method of predicting motor failure based on relationships of motor pair characteristics, such as temperatures. A motor pair detection module receives temperatures for each motor of a...
US20120206162 FAULT DETECTION FOR LAMINATED CORE  
A method and system for evaluating the condition of a laminated core of an electric machine, and including a first yoke wound with a first winding and having a first pair of arms spanning between...
US20140049285 Method For Monitoring Demagnetization  
A method for discovering demagnetisation faults of a permanent magnet synchronous generator, such as a wind power generator. The method is performed during operation of the synchronous generator...
US20120105098 AUTOMATED EMERGENCY POWER SUPPLY TEST USING ENGINE EXHAUST TEMPERATURE  
An automated emergency power supply system (EPSS) and testing solution that records generator load values and engine exhaust temperature values to evaluate whether an EPSS test satisfies...
US20090107255 Test Bench And A Method For Testing Wind Turbine Equipment  
The invention relates to a test bench for testing wind turbine equipment. The test bench comprises one or more load applying means directly and/or indirectly applying load to the equipment, drive...
US20130093457 METHOD FOR TESTING AN INVERTER DRIVE ROTATING ELECTRIC MACHINE  
With a rotating electric machine testing method for applying a test voltage to an armature winding of the rotating electric machine to thereby test insulation performance of the armature winding,...
US20130106460 Method for Detecting a Step Loss Condition  
A method for detecting and correcting for a step loss condition. A back electromagnetic force signal is measured and compared to a reference voltage. The motor continues operating and the back...
US20090107256 Wind Turbine Testing System  
A wind turbine testing system is disclosed for testing at least a part of the nacelle components of a wind turbine system when mounted on a load carrying structure of a nacelle, said wind turbine...
US20140098449 METHOD FOR DETECTING ISLANDING OPERATION OF DISTRIBUTED POWER GENERATOR  
A method and an arrangement are disclosed for detecting islanding operation of a distributed power generator. The method can include determining a frequency of a grid to which the distributed...
US20120019281 System, apparatuses, methods, and computer program products for electric motor testing and analysis  
Systems, apparatuses, methods, and computer program products (i.e., software) for electric motor testing and analysis. Electric motor winding resistance and motor temperature are measured. The...
US20120313662 TEST BOARD AND METHOD FOR TESTING ROTATION SPEED OF FAN  
A method for testing rotation speed of a fan receives a duty cycle ratio related to the fan sent from a dial switch on a test board connected to the fan. The method transmits a pulse width...
US20130013231 SYSTEM AND METHOD FOR PREDICTING MECHANICAL FAILURE OF A MOTOR  
A method for a vehicle having plural electric motors includes generating motor electrical signatures for the motors. The motor electrical signatures represent one or more characteristics of...
US20150145554 METHOD FOR INSPECTING WYE RING  
A method for inspecting a wye ring in a generator includes the steps of dismantling the generator to gain access to the wye ring and at least a portion of a rotor, applying a test signal to the...
US20150085403 SOFT SHUTDOWN FOR ISOLATED DRIVERS  
An apparatus for controlling a high-power drive device external to a package of a motor drive circuit includes a motor drive circuit. The motor drive circuit includes a driver to control the...
US20090322373 PERMANENT MAGNET ROTOR CRACK DETECTION  
A method and apparatus for permanent magnetic (PM) rotor crack detection includes a sensor which monitors magnetic flux distribution of the PM rotor and identifies the presence of a crack in the...
US20090179605 Resolver Abnormality Detection Circuit  
An abnormality detection circuit for a resolver outputs a rotation angle signal corresponding to a rotation angle of a rotor from a resolver winding. In the abnormality detection circuit, the...
US20110121247 FAULT MONITORING SYSTEM FOR ELECTRIC SINGLE OR POLY-PHASE CHAIN HOIST MOTORS  
Single networkable fault monitoring system for monitoring electrical parameters on at least one electrical phase on at least one interconnected electric chain hoist for various fault conditions....
US20140368233 INSULATION INSPECTION INSTRUMENT  
A continuity tester that has particular application for inspecting the insulation on the stator windings in an electric machine. The continuity tester includes a power supply, a brush having...
US20140285230 PARAMETER ESTIMATION SYSTEM AND METHOD FOR AN INDUCTION MOTOR  
A method of estimating stator resistance of an induction motor is provided. The method includes applying voltage pulses through two phase paths of the motor for a plurality of electrical cycles to...
US20110102012 PARAMETER ESTIMATION SYSTEM AND METHOD FOR AN INDUCTION MOTOR  
A method of estimating stator resistance of an induction motor is provided. The method includes applying voltage pulses through two phase paths of the motor for a plurality of electrical cycles to...
US20130307577 METHOD AND DEVICE FOR DETECTING A MALFUNCTION OF AN ELECTRIC MACHINE  
The invention relates to a method for detecting a malfunction of an electric machine, a first variable (isq) influencing the torque (M) of the electric machine (1) being modulated. In order to...
US20140300307 DETECTING FAULTS IN MOTORS AND DRIVES  
Disclosed herein is a system and method for determining faults in motors and drives. The system includes a motor drive that has a DC-link coupled to a power source. A controller system is...
US20150247901 INSULATION INSPECTION DEVICE FOR MOTORS AND INSULATION INSPECTION METHOD FOR MOTORS  
An insulation inspection device for motors includes an inverter for driving a motor, a partial discharge detecting unit for determining soundness of the motor, and a control circuit for...
US20100033166 Method For Estimating The Magnetization Level Of One Or More Permanent Magnets Established In One Or More Permanent Magnet Rotors Of A Wind Turbine Generator And Wind Turbine  
A method for estimating the magnetization level of one or more permanent magnets established in one or more permanent magnet rotors of a wind turbine generator includes the steps of: establishing...
US20110006802 HIGH SENSITIVITY DIFFERENTIAL CURRENT TRANSFORMER FOR INSULATION HEALTH MONITORING  
A current transformer is provided. The current transformer comprises a magnetic core having a central opening, at least one pair of conductors extending through the central opening and positioned...
US20110295558 METHOD AND SYSTEM FOR DETECTING FAULTS IN A BRUSHLESS EXCITER FOR A GENERATOR  
A method and system is provided for operating an electrical machine. The method includes the steps of, providing a brushless excitation system including a diode rectifier having at least one...
US20140009186 ELECTRIC MACHINE  
A method of determining the magnetization level of permanent magnets of an electric machine, whereby a probe winding is placed in an electric machine having a stator with a plurality of stator...
US20150212159 MULTI-WINDING HIGH SENSITIVITY CURRENT TRANSFORMER  
A system includes a sensor configured to detect an electrical leakage current associated with an operation of an industrial machine. The sensor includes a core and a first winding encircling a...
US20120206163 Method for Monitoring a Permanent Magnet Motor  
A test setup for a permanent magnet motor provides a method for identifying symmetry or asymmetry in the magnetic fields of the motor's permanent magnets. The setup comprises a test circuit that...
US20120319723 ELECTRIC MACHINE FOR WHICH THE GROUNDING FUNCTION IS MONITORED AND METHOD  
The grounding quality of an electric machine should be better monitored. Therefore, an electric machine is proposed, comprising a stator (1), a rotor (2), a shaft (3), to which the rotor (2) is...
US20130076389 CURRENT TRANSFORMER ASSEMBLY FOR USE WITH ELECTRICAL MONITORING SYSTEMS AND METHODS OF ASSEMBLING SAME  
A current transformer assembly for use in an electrical monitoring system is described herein. The current transformer assembly includes a housing including a plurality of shielding members that...
US20120146683 ANOMALY DETECTOR OF PERMANENT MAGNET SYNCHRONOUS ELECTRIC MOTOR  
Under a condition that rotor rotation speeds ωes are equal, winding wire currents Id, Iq are equal, and winding wire inductances Ld, Lq are equal in first and second electric motors (1, 2), a...
US20140062525 INVERTER-DRIVEN ROTARY ELECTRIC MACHINE, INSULATION INSPECTION METHOD AND INSULATION INSPECTION APPARATUS  
Insulation inspection method for an inverter-driven rotary electric machine includes: a step of applying, to an insulation sample (2), first impulse voltage simulating a voltage which occurs...
US20120161810 METHOD AND DEVICE FOR DETECTING THE FAILURE OF AN EXCITATION CIRCUIT OF A POLYPHASE ALTERNATOR  
The method of detecting the failure of the excitation circuit of a polyphase alternator controlled by a regulator comprises the following steps: a) electrical information (Iexc) is continuously...
US20100162828 TESTING SYSTEM AND METHOD FOR MOTOR  
A testing system for testing a temperature characteristic of a first motor includes a second motor, a controller, a driver, a load, a temperature sensor, and a temperature recorder. The controller...
US20130057187 METHOD AND DEVICE FOR DETECTING BLOCKING OR SLUGGISHNESS OF A DC MOTOR  
The invention relates to a method for detecting blocking or sluggishness (M1, M3) of a DC motor (2). The method comprises the following steps: applying a voltage pulse (Uv,t=Os) to the DC motor...
US20130222008 METHOD FOR DIAGNOSING AN ELECTRICAL CIRCUIT  
A method for diagnosing an electrical circuit including at least one electrical device, an actuator for the device controlled by a high side actuating switch and a low side actuating switch, and...
US20130278282 MONITORING AND FAULT DIAGNOSIS OF AN ELECTRIC MACHINE  
In a method for monitoring a rotating electric machine (1) that is fed by a converter and for diagnosing faults of said rotating electric machine, a current signature (I1, I2, I3) of output...
US20140159768 ELECTRIC LINEAR ACTUATOR ASSEMBLY AND METHOD OF ASSEMBLY  
A method of constructing an electric linear displacement motor for use in a testing device includes providing a stator having as stator housing with internal coils and a through bore extending...
US20110050277 SYSTEM FOR CONTROLLING AT LEAST ONE ACTUATOR OF THE COWLINGS OF A TURBOJET ENGINE THRUST REVERSER  
The control system of the invention includes at least one actuator (6) for a cowling (2), driven by at least one electric motor (7), and control means (9) for the electric motor (7) and the...
US20150091606 Method for Checking an Exciting Current of a Synchronous Machine in Generator Operation  
The method includes operating the synchronous machine in idle operation; recording a phase voltage measured value of the synchronous machine; ascertaining a phase voltage expected value by...
US20140333343 DETECTION OF BENDING EFFECTS IN THE CASE OF ELECTRIC DRIVES  
A method and a corresponding system for detecting a malfunction in an electric drive unit. The method comprises the following steps: ascertain (S17) a current flow characteristic (1) of an...
US20130234752 DEVICE AND METHOD FOR INSPECTION OF A STATOR CORE OF AN ELECTRICAL MACHINE  
An automated EL CID inspection technique for the stator core of an electrical machine is provided. The inspection device includes a rail, a pickup coil and a coil support assembly. The coil...
US20100244887 METHOD FOR DETECTING A STEP LOSS CONDITION  
A method for detecting and correcting for a step loss condition. A back electromagnetic force signal is measured and compared to a reference voltage. The motor continues operating and the back...
US20110012637 METHOD FOR DETECTION OF INTERLAMINAR SHEET SHORT CIRCUITS IN THE STATOR SHEET CORE OF ELECTROMACHINES  
A method and an apparatus are described for detection of interlaminar laminate shorts in the laminated stator core of electrical machines, in which the laminated stator core (4) is subjected to an...
US20130214811 Detection Of A Missing Stator Slot Wedge In An Electrical Machine  
A missing stator slot wedge in an electrical machine can be detected by analysing a current spectrum of the machine in a high frequency area. A current spectrum is provided from a current...
US20090066360 METHOD FOR DETERMINING AN INDUCTANCE OF A MOTOR  
The intention is to simplify the measurement of an inductance characteristic curve of a motor. To this end, provision is made for a current (i) having a non-periodic current offset component and a...
US20110241723 METHOD FOR MONITORING A CONTROLLER OF A THREE-PHASE ELECTRIC MOTOR AND/OR THE ELECTRIC MOTOR  
A method for monitoring a controller for controlling and/or monitoring a three-phase electric motor, in particular an asynchronous or synchronous motor, wherein two phase currents are measured and...
US20090256584 GAP INSPECTION APPARATUS  
An apparatus for inspection of a gap between two surfaces, at least one of which is ferromagnetic, for example in a generator, includes a sensor platform (26) for one or more sensors (26a) and an...
Matches 1 - 50 out of 156 1 2 3 4 >