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| Application No. | Application Title | Issue Date |
| 20120126738 | Rotating Machinery Condition Monitoring Using Position Sensor Continuous monitoring and fault diagnosis of rotating machinery during variable speed operation is performed using only a position feedback signal. The position sensor generates a periodic waveform having multiple pulses per revolution of the machine. A circuit is inclu... | 05/24/2012 |
| 20120081058 | DC POWER FOR SGCT DEVICES USING A HIGH FREQUENCY CURRENT LOOP WITH MULTIPLE CURRENT TRANSFORMERS Motor drives and switch driver power systems are presented in which high frequency AC current (IHF) is provided through one or more cables (202) magnetically coupled with local driver current transformers (240), and the transformer secondary cur... | 04/05/2012 |
| 20120079799 | ELECTRIC POWER TOOL An electric power tool is provided that includes a motor as a driving source, a first operation switch, a first semiconductor switch, and a second semiconductor switch. The first operation switch is operated by a user to be turned ON/OFF. The first semiconductor switch,... | 04/05/2012 |
| 20120082480 | IMAGE FORMING APPARATUS, MOTOR UNIT AND IMAGE BEARING MEMBER UNIT An image forming apparatus includes at least one image bearing member unit including an image bearing member and a motor including an output shaft coupled with the image bearing member to rotary-drive the image bearing member. The output shaft of the motor includes rota... | 04/05/2012 |
| 20120068653 | METHOD AND SYSTEM FOR DETERMINING DETERIORATION OF PERMANENT MAGNETS OF ELECTRIC APPARATUS A method and a system for determining deterioration of permanent magnets of an electric apparatus to be inspected that facilitate determination without the need to remove the electric apparatus from a facility where it is installed. If the electric apparatus to be inspe... | 03/22/2012 |
| 20120047927 | Solid state control system A control system to selectively control the operation of the compressor of a mini-split air conditioning system including at least one remote evaporator operatively coupled to the compressor to receive refrigerant therethrough, a sensor to monitor the operation of the e... | 03/01/2012 |
| 20120038304 | METHODS AND SYSTEMS FOR DIAGNOSING FAULTS FOR ROTORS OF ELECTRIC MOTORS Methods and systems are provided for diagnosing faults of a rotor of an electric motor. A current is obtained for an inverter using a sensor. A preliminary angle is determined by a control unit or processor using a resolver angle of the rotor. A transformation is conduc... | 02/16/2012 |
| 20120038305 | Fan Failure Detector A fan failure detector means for detecting whether a fan is locked comprising a drive IC, a coil and an inspection circuit, the drive IC means for outputting a pulse signal, the coil is electrically connected to the drive IC and being driven by the drive IC, the inspect... | 02/16/2012 |
| 20120032625 | Electric power conversion apparatus An electric power conversion apparatus converts electric power supplied to a motor having a winding set formed of coils corresponding to a plurality of phases. An inverter part has a plurality of FETs forming switching element pairs, each of which corresponds to each ph... | 02/09/2012 |
| 20120013285 | MOTOR DRIVE COMPONENT VERIFICATION SYSTEM AND METHOD A technique is provided for verifying the proper selection, installation, communication and operability of components in power electronic systems, such as motor drives. A processing circuit is coupled to multiple components or subsystems that identify themselves to the ... | 01/19/2012 |
| 20120013284 | PARALLEL MOTOR DRIVE DISABLE VERIFICATION SYSTEM AND METHOD Systems and methods are provided for performing diagnostic testing for multiple motor drives operating in parallel. In one embodiment, the diagnostic testing may involve determining which of the multiple motor drives are in operation and communicating the active configu... | 01/19/2012 |
| 20120001580 | SYSTEM AND METHOD FOR DETECTING FAULT IN AN AC MACHINE A system and method for detecting a rotor fault condition in an AC induction machine is disclosed. The system includes a processor programmed to receive voltage and current data from an AC induction machine, generate a current frequency spectrum from the current data, a... | 01/05/2012 |
| 20120001581 | CONTROL APPARATUS AND CONTROL METHOD FOR AC ELECTRIC MOTOR A control apparatus and a control method for an AC electric motor detect DC bus current plural times at predetermined intervals during first and second predetermined periods and multiply vectors having integrated values of detected values during respective periods as el... | 01/05/2012 |
| 20110315470 | Motor drive apparatus and method, and electric power steering system using the same When an inverter or a coil set of one system fails in a motor drive apparatus having two power supply systems, a power supply relay of a failing system is turned off. In this case, while a travel speed detection value is less than a predetermined threshold value, curren... | 12/29/2011 |
| 20110316466 | Motor drive apparatus and method, and electric power steering system using the same When failure of an inverter or a coil set of one system of a motor drive apparatus having two systems, is detected, a power supply relay of the failing system is interrupted. At the same time, a control circuit sets a same maximum current limitation value as set before ... | 12/29/2011 |
| 20110309780 | SEAL LEAKAGE AND SEAL OIL CONTAMINATION DETECTION IN GENERATOR Detection of, among other things, seal leakage(s) and/or seal oil contamination for a gas cooled generator are provided. Detectors according to some embodiments of the invention provide mechanisms of early detection of cooling gas, e.g., hydrogen, leakage through leakag... | 12/22/2011 |
| 20110298407 | MOTOR POSITION CONTROLLER The motor position controller inputs a command pulse signal and a desired pulse form setting, and drives a motor based on the command pulse signal. The motor position controller includes a position command generating device configured to generate a position command sign... | 12/08/2011 |
| 20110290580 | Motor drive apparatus and electric power steering system using the same A motor drive apparatus includes a control circuit, which determines that a wire connecting a battery to a first power supply relay and a second power supply relay is broken, and not failure of the power supply relays, if power is not supplied to a motor from the power ... | 12/01/2011 |
| 20110260748 | APPARATUS AND METHOD FOR DIAGNOSING PERMANENT MAGNET DEMAGNETIZATION OF PERMANENT MAGNET SYNCHRONOUS MOTOR, AND APPARATUS FOR DRIVING PERMANENT MAGNET SYNCHRONOUS MOTOR Provided are an apparatus and a method for diagnosing permanent magnet demagnetization of a permanent magnet synchronous motor. The apparatus includes a magnetic field generating unit, a stator current measuring unit, and a demagnetization diagnosing unit. The magnetic ... | 10/27/2011 |
| 20110262112 | Rotation detecting apparatus and rotation detecting system A rotation detecting apparatus for detecting a rotational state of a direct-current motor includes a driving device, a control device, an energization detecting device, an alternating-current component detecting device, and a rotational state detecting device. An impeda... | 10/27/2011 |
| 20110248660 | CIRCUIT AND METHOD FOR SPEED MONITORING OF AN ELECTRIC MOTOR A circuit for speed monitoring of an electric motor comprises a circuit for generating a time-frame signal, a circuit for receiving a first signal from a chopper driver circuit designed to drive the electric motor, a circuit for detecting chopper pulses in the first sig... | 10/13/2011 |
| 20110241458 | 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 flowing in a plurality of passages provided in the stator coils. The system... | 10/06/2011 |
| 20110241590 | MOTOR DRIVING APPARATUS HAVING FAULT DIAGNOSTIC FUNCTION A motor driving apparatus capable of detecting during operation a ground fault and a phase-to-phase short circuit by distinguishing one from the other is provided while minimizing an increase in cost. The sum of three-phase AC currents supplied from a three-phase AC pow... | 10/06/2011 |
| 20110234138 | MOTOR DRIVE DEVICE A motor drive device has a drive unit having at least three pairs of upper and lower arms including switching elements at each of the upper arm and the lower arm, for driving a motor based on an ON/OFF operation of each of the switching elements by a PWM signal, a singl... | 09/29/2011 |
| 20110227521 | METHOD OF STARTING A FAN A fan starting method including following steps is provided. A fan module including a control unit and a fan is provided, wherein the control unit and the fan are electrically connected with each other. An electric power is supplied to the fan module, wherein the electr... | 09/22/2011 |
| 20110229163 | LOAD ABNORMALITY DETECTION APPARATUS PERFORMING ACCURATE JUDGMENT OF CAUSE OF ABNORMALITY A load abnormality detection apparatus detects a load abnormality in at least one of a first rotational member and a second rotational member. An element acquisition part acquires a first control element and a second control element. A first comparison part compares the... | 09/22/2011 |
| 20110229164 | ELECTRONIC DEVICE, MALFUNCTION DETERMINING METHOD, AND COMPUTER PROGRAM PRODUCT An electronic device including a first motor, the electronic device including: a first movable body that is driven to move by the first motor; a detecting unit that detects a signal according to rotation of the first motor or movement of the first movable body; an analy... | 09/22/2011 |
| 20110221373 | COMPUTER FAN ALARM CIRCUIT A circuit for alarming abnormal state of a computer fan includes a detection circuit coupled to the computer fan, a controller coupled to the detection circuit and the computer fan, an alarm unit coupled to the controller. The detection circuit detects a power source an... | 09/15/2011 |
| 20110214660 | SYSTEM FOR MONITORING A COOLING FAN OF AN APPLIANCE A system for monitoring a cooling fan having one or more fans blade and utilized in an appliance having a heating element. Such a system generally includes an electric switch actuated by a magnetic field of a magnet mounted on a rotary member of the cooling fan. The ele... | 09/08/2011 |
| 20110215751 | Electric power converter An electric power converter includes a control unit outputting a PWM signal, a bridge circuit producing AC electric power supplied to a motor by turning semiconductor switching devices in the bridge on and off in response to PWM signals, a cut off unit cutting the PWM s... | 09/08/2011 |
| 20110199036 | METHOD AND DEVICE FOR DIAGNOSING A FAN Method for diagnosing a fan, in particular in a cooling circuit of an internal combustion engine, a current driving the fan being ascertained. The fan is triggered by a defined trigger signal, and depending on the ascertained current, a diagnosis of whether the fan is d... | 08/18/2011 |
| 20110198521 | DIRECT-CURRENT MOTOR CONTROL DEVICE AND METHOD FOR DETECTING STATE OF DIRECT-CURRENT MOTOR A current detection unit detects an electric current caused by superimposing a direct current from a direct-current power source on an alternating current from an alternating-current power source and supplied through a brush to a direct-current motor. An extracting unit... | 08/18/2011 |
| 20110187304 | MOTOR PHASE WINDING FAULT DETECTION METHOD AND APPARATUS A method of detecting a phase winding fault in a multi-phase electric machine is executable via a motor controller, and includes measuring feedback signals of the machine, including each phase current, and generating reference phase voltages for each phase. The method i... | 08/04/2011 |
| 20110181224 | METHOD FOR MEASURING AN OPERATING VARIABLE AT MULTIPLE ELECTRIC MOTORS OF AN AUTOMATIC PARKING BRAKE A method for measuring at least one operating variable at multiple electric motors of an automatic parking brake with the aid of a sensor system, the signals generated by the sensor system being processed by a processing device. To minimize the influence of signal inter... | 07/28/2011 |
| 20110169388 | AUTOMATIC FURNITURE FLAP TYPE DETECTION Electromotive furniture-flap drive, characterized by an identification device for automatically identifying the type of furniture flap in the installed state of the furniture flap drive.... | 07/14/2011 |
| 20110156630 | Device and Method for Detecting Type of Fan This invention provides a device and method for detecting a type of a fan. The device for detecting a type of a fan includes a detector and a voltage controller. The detector is used for detecting and comparing a control voltage with a reference voltage to generate a co... | 06/30/2011 |
| 20110156629 | ELECTRIC POWER STEERING DEVICE An electric power steering device includes: an electric power source for supplying first current; a controller for setting a current instruction value; multiple electric power converters for converting the first current to second current corresponding to the current ins... | 06/30/2011 |
| 20110149446 | ELECTRONIC SYSTEM AND PROTECTION METHOD FOR ELECTRIC MOTORS An electronic protection system for motors is provided that includes electric current (SC1-n) sensor elements, more specifically Hall positioning sensors, and electronic circuits for electric tension reading. The signals are processed by a central processor (... | 06/23/2011 |
| 20110121771 | SIGNAL STATUS DIAGNOSING DEVICE FOR CONTROLL ACTUATOR AS DRIVEN OBJECT Provided is a signal status diagnosing device for a control actuator, which is enabled by a simple constitution to perform the transmission of the status of a drive signal in a control actuator, the transmission of a signal indicating the occurrence of troubles such as ... | 05/26/2011 |
| 20110114782 | Dispenser with Low-Material Sensing System Apparatus, systems and methods for dispensing sheet material from a roll which include a low-material sensing system. The low-material sensing system provides an indication when the sheet material approaches depletion or is depleted so that the depleted sheet material r... | 05/19/2011 |
