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US20090289656 |
Dry-type high-voltage load system apparatus and method of preventing chain breaking and arc discharge for use therewith
A dry-type high-voltage load system apparatus has a space-saving structure, which is resistant to chain breaking, arc discharge and vibration, and a method of preventing the chain breaking and the...
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US20090289145 |
ELECTROMECHANICAL ACTUATING ASSEMBLY
An electromechanical actuating assembly ( 100 ), operable in a plurality of fault-tolerant modes to accommodate at least the most probable fault situations. In the M1D1-only mode, actuator-moving...
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US20090271060 |
Method And Apparatus For Detecting An Insufficient Phase Current In A Permanent Magnet Synchronous Motor
A method is provided for detecting an insufficient or missing phase current in a permanent magnet synchronous motor, and includes determining a composite vector position of a combined three-phase...
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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 ( 26 a ) and...
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US20090243647 |
Non-Invasive monitoring and diagnosis of electric machines by measuring external flux density
System and methods for monitoring electric machines are provided. A magnetic field associated with the electric machine is measured at one or more points external to the electric machine, wherein a...
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US20090219050 |
METHOD FOR DETECTING A MALFUNCTION IN AN ELECTROMAGNETIC RETARDER
A method for detecting a malfunction in an electromagnetic retarder. More specifically, the method relates to a retarder comprising: stator primary coils ( 8 ); a control unit ( 19 ) for injecting...
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US20090179663 |
METHOD AND DEVICE FOR DETECTING INTERLAMINAR SHORT CIRCUITS
A method for determining a short circuit between at least two stator laminates in an electrical machine having a rotor mounted on a shaft and a stator, includes rotating the rotor on the shaft...
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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...
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US20090153093 |
METHOD AND CONTROLLER FOR DETECTING A STALL CONDITION IN A STEPPING MOTOR DURING MICRO-STEPPING
A method is provided for detecting a stall condition in a stepping motor. The stepping motor has two coils and a rotor, and is micro-stepped by substantially continuously driving both of the two...
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US20090146680 |
SELF-GUIDING INSTRUMENT CARRIER FOR IN-SITU OPERATION IN A GENERATOR
Removal of the rotor of a large electrical machine is costly and time consuming, and in particular the outage time of a power plant, which is needed for the removal of a generator rotor, is very...
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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...
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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...
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US20090096463 |
HYBRID VEHICLE TESTING SYSTEM AND METHOD
In a hybrid vehicle, first, an engine is locked by an engine shaft locking mechanism. A first motor is connected to a first inverter circuit and a second motor is connected to a second inverter...
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US20090091289 |
STATOR INTER-TURN FAULT DETECTION OF SYNCHRONOUS MACHINES
A fault detection system using field current and rotor search coil voltage harmonics is provided. The technology is capable of detecting an inter-turn fault unambiguously and rapidly in a...
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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...
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US20090033357 |
Winding fault detection system
A control system is disclosed. The control system has an electric machine coupled to provide power to or receive power from a DC bus and a controller in communication with the electric machine and...
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US20090021091 |
MOTOR DRIVE APPARATUS AND ITS INSPECTION METHOD
A motor drive apparatus includes a motor unit including an output shaft and a first terminal connecting portion; a control board including a second terminal connecting portion, and configured to...
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US20080315909 |
Method of detecting a malfunction of an encoder for a vehicle drive system
A method of detecting a malfunction of an encoder used in a vehicle drive system includes determining an error of a motor speed based on an estimated motor speed, wherein the estimated motor speed...
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US20080309366 |
System and method for bearing fault detection using stator current noise cancellation
A system and method for detecting incipient mechanical motor faults by way of current noise cancellation is disclosed. The system includes a controller configured to detect indicia of incipient...
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US20080303543 |
Measuring Device
An apparatus for testing an electric motor is described. The motor comprises stator windings and a rotor arranged along a rotation axis. The apparatus is adapted to measure a physical quantity of...
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US20080294360 |
METHOD FOR DETECTING THE LOSS OF ONE OR MORE PHASES IN A PERMANENT-MAGNET SYNCHRONOUS ELECTRIC MOTOR
The present invention relates to a method implemented in a speed controller ( 1 ) to detect a loss of one phase, two phases or three phases in a three-phase permanent-magnet synchronous motor...
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US20080278341 |
SYSTEM AND METHOD FOR MONITORING MOTOR
A system ( 100 ) for monitoring a motor ( 202 ) includes a potential-detecting module ( 102 ), a potential-comparing module ( 104 ) and a motor-monitoring module ( 106 ). The potential-detecting...
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US20080251071 |
Method and system for motor failure detection
Systems and methods for detecting developing faults in a flow generator or ventilator during therapeutic use thereof are provided. The motor current may be measured to estimate the torque input by...
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US20080150573 |
Testing Inverter Driven Electric Motor Shut-Off Path
A method for testing electric motor shut-off including injecting current into an electric motor, applying at least one of a short or an open to the electric motor for a predetermined length of...
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US20080150572 |
Magnetic test apparatus
A magnetic test apparatus, in accordance with one embodiment, comprising a rotor coupled to a drive shaft, wherein the drive shaft is mechanically coupled to a drive system; a stator coupled to at...
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US20080143341 |
SYSTEM AND METHOD FOR NON-DESTRUCTIVE TESTING OF ROTORS
A method is provided for testing an electrical characteristic of a rotor. In one embodiment, the method may include applying current to the rotor, measuring voltage drop between first and second...
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US20080136360 |
Apparatus, System, and Method for Detecting an Electrical Short Condition In A Dynamoelectric Machine
A system, apparatus, and method ( 10 ) for detecting an electrical short condition in a dynamoelectric machine are described. The method includes determining an operating parameter of a...
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US20080100332 |
System and method for detecting a motor shorting relay failure
Methods and systems for detecting a motor shorting relay failure. Exemplary embodiments include methods and systems for determining a motor shorting relay failure in a motor, the motor having first...
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US20080084229 |
System and method for look ahead detection of electrical problems at a motor of a vehicle
A system for sensing short circuits and open circuits prior to operation of a motor (i.e., while the motor is in a static state), thereby sparing the electrical system from destructive effects of...
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US20080074111 |
METHOD AND APPARATUS FOR LAYER SHORT DETECTION OF ELECTRIC ROTATING MACHINE
There is provided a detector for detecting a layer short of a field winding in operation by measuring, with a field detector, a magnetic field generated from a field winding of an electric rotating...
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US20080048710 |
Detection and monitoring of partial discharge of a power line
There is provided a method that includes (a) determining a characteristic of a fundamental spectral component of a spectrum of a power spectrum of noise on a power line, and (b) determining a...
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US20080042683 |
METHODS AND SYSTEM FOR DETECTING WINDING FAULTS IN A GENERATOR WITH PARALLEL WINDINGS
A method for detecting stator ground faults in a generator is described. The method includes receiving a neutral voltage signal from a neutral point of a stator, receiving a plurality of terminal...
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US20080042682 |
Method for detecting malfunction in clamping and machine tool
The method for detecting any clamping malfunction of the work within the machine tool which clamps both ends of the work with clamping mechanisms 23, 24 of a pair of headstocks 19, 29, and...
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