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8180526 Equipment for vehicle and communication interface circuit for use in this equipment  
Equipment for vehicle in accordance with the present invention includes: a vehicle-mounted unit which runs with respect to a vehicle body ground on a side of a negative electrode of a battery; an...
8169174 Motor circuit and electric power steering apparatus  
In a steering control unit, a U-phase feed line branches into paired branch feed lines, phase-open MOSFETs are provided in middle portions of the branch feed lines, phase-open MOSFETs are provided...
8164298 System and method for detecting loss of isolation while an AC motor is operating  
Methods and systems are provided for detecting loss of isolation of a motor, connections, or phase cables while an AC motor is operating. The system includes a power supply that is substantially...
8159165 Motor drive circuit  
A first semiconductor switching element connects to a high side of a motor and includes a diode whose cathode faces the high side. A second semiconductor switching element having a diode resides on...
8159792 Motor control device  
In a motor control device that drives a plurality of motors with one DC power supply, detection of a short circuit fault occurring in the motors is realized with an inexpensive configuration. In...
8149551 Systems and methods involving motor drive ground fault interrupts  
A method comprises determining whether a ground fault on a bus (110) operative to drive the system (100) exceeds a first threshold level, (502) receiving values of phase currents of a first motor,...
8144438 Motor control center communication system  
A motor control center communication system configured to interface with a communication network. The system includes a plurality of motor control units (MCUs), and a MCU controller configured to...
8144439 Method and circuit for producing rotor position signals and for the commutation of brushless direct-current motors, without using sensors  
A method and a circuit are provided for the commutation of brushless direct-current motors (BLDC motors), without using sensors, and especially to a method and a circuit for producing rotor...
8130478 Power limiting system for multiple electric motors  
A power limiting system for multiple electric motors includes an electrical power generating component, such as an alternator, and a plurality of motor controllers connected to an electrical bus....
8125179 Controlling a power of an electrical motor  
A motor control circuit (MC) comprising input terminals (IT1, IT2) to receive a rectified input voltage (Vrm), and output terminals (OT1, OT2) to supply a motor drive signal (Vm). A switching...
8125747 Method for mitigating negative sequence effect resulting from non-symmetrical short circuit failure of synchronous electric machine based systems  
A drive system for a multi-phase electric machine with a permanent magnet rotor, the drive system may comprise conduction paths for each phase. Detectors on each of the conduction paths may...
8125171 Process for driving an electric machine and driver system therefor  
A method for operating an electric machine with a driver system is provided, in which an operating variable of the electric machine and/or of the driver system is monitored. The validity of the...
8089736 Driving device and protection method thereof  
A driving device includes a motor, a first rotating portion, a second rotating portion, a piezoelectric assembly, and a controlling unit. The motor includes a rotating shaft. The first rotating...
8084967 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...
8085515 Electric power source for motor vehicle  
An electric power source for a motor vehicle is equipped with a welded state discriminator, and while a positive-side contactor and negative-side contactor are controlled to be switched off, the...
8085514 Modular on-machine controller  
A modular control assembly is provided for on-machine control of a desired machine. One embodiment has a machine mountable base and a replaceable control unit, wherein the machine mountable base...
8080962 Motorised barrier roller  
A fire or smoke barrier 1 has a curtain 2 deployed from a motorized roller 3 mounted in a head box 4. Remote from the head box and connected to the motor via a cable 5 is a motor controller circuit...
8076896 Inverter controller and method for operating the same  
An inverter controller comprising an AC motor as a load. A rectifying circuit converts AC power from an AC power source into DC power. A smoothing capacitor smoothens a DC voltage from the...
8072725 Connection unit and vehicle incorporating the same  
A connection unit includes a first relay connected between a first electrode of a first battery and a first power feed line towards a vehicle load, a second relay connected between a second...
8072179 Electronic starter device for an electric motor, in particular for a compressor of a refrigerating circuit of an electric household appliance  
An electronic starter device for an electric motor including a first terminal connected in use to a mains voltage source selectively activatable by means of control means to feed respective starter...
8063597 Electric circuit providing protection from transients  
An electric circuit for supplying power to a DC application is disclosed. The electric circuit comprises a DC power source (1) connectable to an alternator charging circuit (2), an FET (T7), and a...
8054014 Control system for an electrical machine  
In a control system and a method for operating a permanent-magnet electrical machine, when the electrical machine is switched off after one of a functional computer and a monitoring computer of the...
8049455 Electric power converter  
Specific anomalies and details of failures as well as measures thereagainst are described that might possibly occur in electric power converters that drive and control permanent-magnet synchronous...
8045301 Motor drive device  
When an upper arm of U-phase has failed because of short-circuit, lower arms of V-phase and W-phase as the opposite arms are switching-operated. When only the lower arm of V-phase is turned on, a...
8040643 Power supply switching apparatus with severe overload detection  
Power supply switching apparatus comprising an output switch for supplying power from a power supply to a load connected to an output terminal, a driver for controlling turn-on of said output...
8038046 Electrical surgical instrument with optimized power supply and drive  
A surgical instrument includes an end effector having an actuation assembly to effect a surgical procedure when actuated. An electric motor has a rated operating voltage and is operationally...
8040096 Rotary electric system with star-connected multiphase stator windings  
In a rotary electric system, a switch member includes at least one of a first switch and a second switch. The first switch is connected between a neutral point of multiphase stator windings and a...
8031446 Method of detecting output phase loss for motor driver  
A method of detecting an output phase loss (OPHL) for a motor drive detects an abnormal OPHL operation when at least one phase of a three-phase current is continually zero. Each phase of the...
8030862 Methods and systems for operating direct current motors  
A method for applying power to an electronically commutated motor (ECM) is described. The method includes connecting an AC voltage source to an input of a rectification circuit, connecting a DC...
8018695 Fuel pump control apparatus  
A control apparatus for controlling a fuel pump includes: an electronic switch provided in a circuit for connecting a power supply to a motor for driving the fuel pump; a current detector which...
7994747 Suppressing phased motor voltage transients on disconnect  
A clamping circuit is included in a phased motor control circuit, particularly on an electrical connection connected to at least one electrostatic discharge cell and/or the driver control...
7969107 Motor control device  
A microcomputer compares a low voltage LV and a middle voltage MV to a predetermined voltage Vth set at a value in the vicinity of the grounded voltage (0 V) on the basis of detected phase voltages...
7954334 Inverter system and vehicle  
An inverter system having a semiconductor device, and a railway vehicle using this inverter, provide a more accurate determination of whether an abnormal heat generation from the inverter is...
7952362 Device for measuring the loss factor  
A device for measuring the loss factor and/or measuring the phase angle between a voltage and a current and/or recording a voltage decay and/or current decay and/or recording partial discharge...
7948721 AC motor bypass with fault annunciation, serial communication and fault tolerant coil control  
A motor bypass is controlled by a digital signal processor (DSP) with embedded control software that allows fault detection and annunciation, serial communications between both a variable frequency...
7948205 Multi-phase AC motor driving device  
A multi-phase AC motor driving device in which occurrence of failure is not erroneously determined is provided. In a multi-phase AC motor driving device including an inverter circuit; current...
7948391 Signaling device for a safety circuit  
A signaling device for a safety circuit has an input part for receiving an external state variable, at least one switching element and a control part. The control part controls the at least one...
7946576 Document stacker with fault detection  
Techniques include sensing electric signals from an actuator during a document stacking operation and determining whether an abnormal event has occurred based on the sensed signals. The techniques...
7944652 Inverter with protection function  
A pulse width modulator generates a PWM signal whose duty ratio is feedback-controlled so that a detection voltage according to a current across a secondary coil of a transformer is brought close...
7940021 Motor sensing circuit with transient voltage suppression  
A motor sensing circuit with transient voltage suppression includes a sensing unit and an impulse absorber. The sensing unit has an electrical switch generating a pulse sensing signal when...
7928681 Disk apparatus capable of determining failure of spindle motor  
A control portion instructs supply of an offset voltage while a disk remains stopped at the time of start. While the disk remains stopped at the time of start, a differential operational amplifier...
7928685 Method of manufacturing a starting device for a three phase electric motor, and a starting device  
When manufacturing a starting device for a three-phase electric motor, especially a soft starter, in at least one embodiment an arc quenching system is at least partly removed from a commercially...
7911755 Circuit arrangement for electrically controlling power and cooling arrangement  
A circuit that electrically controls power includes at least one power control device and at least one heat extraction device. The at least one extraction device is in thermal contact with the at...
7911352 Method and apparatus for protection of AC-DC power converters  
An AC-DC power converter controls an external upstream switching device, which supplies it power to be converted. Power conversion is initiated when an external signal requests power be converted...
7907375 Self powered electronic overload method and system  
A sensing and switching device, such as an overload relay, is provided which includes a processor configured to make measurements and control operation (e.g., tripping) of the device. The processor...
RE42200 Fault handling of inverter driven PM motor drives  
An apparatus includes a multi-phase inverter, a fault detector to indicate a detection of a fault, a sensor to provide a speed signal indicative of whether a speed of a PM motor is greater than a...
7885044 Motor drive device with lock protection function  
A cooling system is provided with a motor drive device, a fan motor, and a Hall element. The motor drive device includes a lock protection circuit and a lock controller. When a control signal...
7880418 Electromechanical drive system, in particular for progressive cavity pumps for oil wells  
The following invention is an electromechanical system (1) that is to be connected to an electricity supply (7), comprising: an electric machine (2) that can operate as an independent generator...
7859213 Control device and control method  
A control device for controlling a recovery from a locking of a motor includes: a switching unit which supplies a motor current from a current supplying unit to the motor; and a driving control...
7859801 Control apparatus for linear compressor  
The present invention discloses a control apparatus for a linear compressor which can vary a cooling force and prevent an inrush current. The control apparatus for the linear compressor includes a...