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| Number | Title | Issue Date |
| 8022648 | Motor driving circuit A motor driving circuit for full-wave single-phase driving a motor includes a position detection unit, a turn-on signal generation unit, and switching devices that define an H-bridge circuit. The turn-on signal generation unit includes a differential amplifier arran... | 09/20/2011 |
| 8022647 | Gas water heater actuator A system and method for enabling automated activation of a temperature control shaft of a gas valve includes an electric motor having a motor shaft and integral coupler, wired to a relay control circuit and controlled by a standard electric timer device. ... | 09/20/2011 |
| 7956559 | Motor driving device The invention discloses a motor driving device for generating at least one driving signal according to a clock signal corresponding to the output signal of a hall sensor. The motor driving device also controls rotation of a motor via at least one driving signal, whe... | 06/07/2011 |
| 7863841 | Class H drive A method for driving a load by using an output stage amplifier in full bridge configuration whose supply is modulated by means of a fast switching power converter, controlled in order to maintain the stage's output common mode at its minimum voltage, is presented. T... | 01/04/2011 |
| 7863840 | Motor driving circuit A motor driving circuit comprising: a synchronous rectification driving circuit to carry out synchronous rectification, to energize a driving coil connected between a first connection point at which a first source and first sink side transistors are connected in ser... | 01/04/2011 |
| 7781998 | Fan systems A fan system comprising a first switch, a second switch, a coil, and a drive device. The drive device comprises a third switch and a fourth switch. The third switch, the fourth switch, the first switch, the second switch and the coil form a bridge connection. ... | 08/24/2010 |
| 7688011 | Control circuit for an electronically commutated motor A control circuit for an electronically commutated motor (120), having a power stage (122) that comprises at least two semiconductor switches (216, 218) to influence the motor current. The semiconductor switches are controllable by way of commut... | 03/30/2010 |
| 7656111 | Low power preamplifier writer architecture A circuit is adapted to activate a writer head of a data storage media drive during both the boost periods as well as the steady state periods. The current supplied to the writer head during the boost periods exceeds the steady state current and flows between positi... | 02/02/2010 |
| 7629758 | Driving apparatus and a driving method for a single phase motor A driving apparatus and a driving method for a single phase motor utilizes a driving transistor unit, and an auxiliary driving transistor unit to provide two driving currents with the same direction as the single phase coil. Next, a control unit is used to control t... | 12/08/2009 |
| 7612512 | Electronic control unit for controlling external half-bridge power output stages and an electric motor operated drive with electronic control unit In order to control an electromotive drive, a control unit has control modules for controlling half-bridge end power stages. Two of the control modules are pre-configured for alternatively controlling a commutator motor or a brushless electric motor via two half-bri... | 11/03/2009 |
| 7498755 | Brushed motor control with voltage boost for reverse and braking A single low side power transistor switch is used to efficiently control a brushed motor in a forward rotational direction. A boost voltage power supply is used to supply voltage to the brushed motor in a reverse rotational direction and/or braking from the forward ... | 03/03/2009 |
| 7411363 | Conservation of electrical energy and electro-magnetic power in motor, generator, and product components A capacitor, inductor, and power line are arranged in a series parallel combination tank circuit that operates over four quarters of a complete cycle. During the first quarter cycle: power is applied to the tank circuit, current flows through the inductor to the cap... | 08/12/2008 |
| 7408313 | Low power preamplifier writer architecture A circuit is adapted to activate a writer head of a data storage media drive during both the boost periods as well as the steady state periods. The current supplied to the writer head during the boost periods exceeds the steady state current and flows between positi... | 08/05/2008 |
| 7400106 | Method and apparatus for providing torque limit feedback in a power drill A battery-powered tool indicates to an operator that a torque limit has been reached. The tool comprises a driver circuit for generating motor interface driving signals, a motor interface circuit coupled to a motor to selectively couple power to the motor in accorda... | 07/15/2008 |
| 7367358 | Medical fluid delivery system and method relating to the same A medical fluid delivery system for the use in the delivery of medical fluids. The medical fluid delivery system may include a pumping system, a disposable medical fluid line set and a valve operating system. The disposable tubing line set may include valves adapted... | 05/06/2008 |
| 7365508 | Motor, actuator and controller thereof A motor comprises: coil on/off switching devices for switching between an on-state wherein current is supplied to the coils, and a first off-state wherein the coil terminals are open-circuited or a second off-state wherein the coil terminals are short-circuited; and... | 04/29/2008 |
| 7359166 | Method and control system for controlling electric motors There is described a method for controlling an electric motor comprising an operating relay having relay windings with respective first and second relay contacts and a control means, which motor via current conductors is connected to said relay and a power source wh... | 04/15/2008 |
| 7358696 | Method and apparatus for PWM drive During PWM control in which an actuator (9) is connected between the output terminals of a bridge circuit made up of switching elements (121, 122, 221, 222) and power is applied to the actuator (9) with signals G1U, G1L, G2U... | 04/15/2008 |
| 7358690 | Motor control apparatus In a motor control apparatus in which a higher voltage is directly applied to a driving unit for a motor from a battery and a lower voltage stepped down by a switching regulator from the battery is also supplied to a control unit, the switching regulator is started ... | 04/15/2008 |
| 7355358 | Configurable H-bridge circuit In an implementation of a configurable H-bridge circuit, a high switch is connected to a voltage source and a low switch is connected to ground. The configurable H-bridge circuit includes a first configuration as a motor drive circuit in which the high switch and th... | 04/08/2008 |
| 7355361 | Motor control apparatus A motor control apparatus can protect circuit elements in an appropriate manner while preventing an incorrect abnormality determination when a motor is in regeneration operation, etc. The apparatus includes a target current calculation section (51), a drive c... | 04/08/2008 |
| 7352145 | Voltage-sensitive oscillator frequency for rotor position detection scheme A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry.... | 04/01/2008 |
| 7348740 | Motor control circuit for forward/reverse rotation A motor control circuit for forward/reverse rotation comprises a driving circuit, a switching circuit and a motor coil winding. The driving circuit has a driving source, a Hall IC and a driving IC. The driving source provides a signal to enable the Hall IC to output... | 03/25/2008 |
| 7342369 | Differential ripple detection method and system Method and system of monitoring operations of an electric motor. The method and system being applicable to any number of motors of the type used to drive moveable members, including but not limited to motors used to drive automatic vehicle windows and motors used to... | 03/11/2008 |
| 7340158 | Method and circuit configuration for controlling a polyphase brushless electric motor A method is specified for controlling a polyphase brushless electric motor, wherein the motor phase currents which are associated with the phases are produced by clocked variation of the respectively applied electrical potential. In this case, the motor phase curren... | 03/04/2008 |
| 7325361 | Apparatus and method for providing a modular sliding door mechanism A modular drive assembly for a sliding door, comprising: a guide track having a hinge slidably received therein; a pair of pulleys disposed on either end of the guide track; a pair of cables each having an end that is secured to the hinge and the other end is secure... | 02/05/2008 |
| 7327103 | Driver and method for control of voice coil motor in disk drive A driver for a voice coil motor in a disk drive includes a sensor that provides a sense current by sensing a coil current in the voice coil motor, a comparator that provides an error current by determining a difference between a command current and the sense current... | 02/05/2008 |
| 7327589 | Full-bridge circuit A full-bridge circuit for a heat dissipation system. The heat dissipation system further includes a fan and a control circuit. The control circuit outputs a first control signal and a second control signal. The full-bridge circuit includes a first control line havin... | 02/05/2008 |
| 7312545 | Controller for electric power steering and electric power steering system An electric power steering drive system provided with a motor with its torque pulsation reduced, and a controller characterized by excellent manufacturability. The stator core of a motor is composed of an annular back core and a plurality of teeth created sep... | 12/25/2007 |
| 7310225 | Heat radiation structure for secondary battery module, and switching board and secondary battery module having the same A heat dissipation structure connected to switching elements that control charge and discharge of a secondary battery module, the heat dissipation structure includes a pair of side frames to which charge-purpose switching elements and discharge-purpose switching ele... | 12/18/2007 |
| 7294984 | Motor controller A motor controller is provided which can be reduced in the number of the wirings and power semiconductor devices required while maintaining the function equivalent to or higher than that of the motor controller adopting the existing winding changeover scheme, thereb... | 11/13/2007 |
| 7294983 | Motor drive circuit Two systems consisting of an on-off control section corresponding to the saturation drive system and a constant voltage control section corresponding to the constant voltage drive system are provided as a circuit for controlling the conduction state of a transistor ... | 11/13/2007 |
| 7291996 | Optical disc drive and brake control method thereof An optical disc drive 1 includes a spindle motor 11 for rotating the optical disc 2 and a spindle driver for driving the spindle motor 11 equipped with a rotation number counter 232 for measuring the rotation number of the spindle ... | 11/06/2007 |
| 7285930 | Method and device for controlling a multiphase electronically commutated motor A method is specified for controlling a multiphase motor that is commutated by an inverter-side bridge circuit, in the course of which a particularly precise and technically simple detection of a control-relevant variable of a considered motor phase, in particular o... | 10/23/2007 |
| 7275001 | Method for measuring electrical current levels in a power switching device A method for determining an electrical current value using at least two current sensing circuits. One current sensing circuit is provided if the current value is below a switching threshold. The other current sensing is provided if the current value is above a switc... | 09/25/2007 |
| 7272303 | Method and control circuit for driving an electric motor of a seatbelt retractor An electric motor drives a belt spool of a seatbelt retractor in a vehicle using a micro-controller and a drive circuit that drives the electric motor. A plurality of PWM control signal sources are provided each of which has a trigger input and a control signal outp... | 09/18/2007 |
| 7271993 | Control of current in an inductance with pulse width modulation at control frequency A PWM controller for a bridge driver circuit for controlling current in an inductive load such as a motor, can set the driver into a forward mode, a slow decay mode or a fast decay mode, and can switch from slow decay mode into forward mode or into fast decay mode f... | 09/18/2007 |
| 7268408 | Wiring board, method for manufacturing wiring board and electronic component using wiring board A wiring board which can realize a small and thin passive component such as solid condenser, resistor, coil, transistor or so on is provided. A wiring board which forms an electronic component by mounting a passive element, comprising an insulating board provided wi... | 09/11/2007 |
| 7268443 | Wind turbine generator system A wind turbine generator system can regulate the rotational velocity of the wind turbine within an operation range even when the wind velocity suddenly changes and can perform continuous operation of the wind turbine. The wind turbine generator system includes a gen... | 09/11/2007 |
| 7268516 | Circuit for use with switched reluctance machines A switched reluctance machine is energized by phase circuits with four active switches, for example MOSFETs, arranged in a bridge configuration. The switches are capable of conducting current in both a first direction and a second direction and are capable of operat... | 09/11/2007 |
