Quotables
"This is the patent age of new inventions for killing bodies, and for saving souls. All propagated with the best intentions."
Lord Byron ;
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8080959 | Motor driving circuit A motor driving circuit includes at least one set of switching elements, each set of switching elements being two switching elements connected in series to each other, and a diode connected in parallel with one of the two switching elements connected on a power sour... | 12/20/2011 |
| 8018186 | Method and apparatus of fan motor brake An electronic system for controlling a fan motor includes a microcontroller and a drive circuit. The microcontroller draws power from a first voltage source and generates control signals for sending drive current to stator coils of a fan motor via the drive circuit.... | 09/13/2011 |
| 7872433 | Bridge driver circuit with integrated charge pump Bridge driver circuit with integrated charge pump is disclosed. One embodiment provides a driving circuit section of a charge pump capacitor being formed with power switch components and/or diodes of a bridge circuit section. ... | 01/18/2011 |
| 7535189 | Motor drive circuit A motor drive circuit comprises a first power line; a second power line; an H-bridge circuit that includes a first source transistor and a first sink transistor connected serially, a second source transistor and a second sink transistor connected serially, a motor c... | 05/19/2009 |
| 7358693 | Motor drive control device Disclosed is a motor drive control device which uses mechanical switches configured in an H-bridge shape and can protect the mechanical switches from being damaged and minimize a voltage chattering problem occurring upon switching on and off The motor drive control ... | 04/15/2008 |
| 7180257 | Method of brake pulse rejection in commutation pulse detection circuits 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.... | 02/20/2007 |
| 7122982 | DC motor rotation information detecting device A rotation information detection device detects rotation information of a DC motor based on a surge component waveform superimposed on a voltage waveform between the terminals of the DC motor or a current waveform of the DC motor, a circuit is provided which supplie... | 10/17/2006 |
| 7064506 | System and method for power seat motor control A method for controlling a vehicle power seat motor including the steps of generating at least one control signal using a controller, and adjusting the speed of the motor in response to the at least one control signal such that speed of the motor is maintained to a ... | 06/20/2006 |
| 6995531 | Direct current motor drive circuit and fan motor including the same A direct current motor drive circuit comprises: a hall element; an H-bridge drive circuit which receives an input of a sinusoidal signal outputted from the hall element and outputs rectangular wave signals corresponding to the sinusoidal signal; a dead time circuit ... | 02/07/2006 |
| 6982531 | Driving circuit for switches of direct current fan motor A driving circuit for switches of direct current fan motor is disclosed. The driving circuit includes a plurality of switches, a first control circuit, and a second circuit. The switches are driven by a first pulse width modulation signal and a second pulse width mo... | 01/03/2006 |
| 6975083 | Control for a half-bridge A control circuit, processor and half-bridge are provided for operating electric motors. The half-bridge includes a first electronic switch lying between a supply voltage and a phase tap, and a second electronic switch lying between the phase tap and ground. The con... | 12/13/2005 |
| 6956349 | Motor drive apparatus A valve opening and closing control device of a type making use of a motor enhances driving performance of the motor and restricts heat generated by constituent elements. A bridge circuit of a motor driving circuit comprises three rows of arms comprising two switchi... | 10/18/2005 |
| 6909252 | Pre-drive circuit for brushless DC single-phase motor A pre-drive circuit for a brushless DC single-phase motor permits a cost reduction and an easy adjustment for the control input voltage of a switching device adjacent to a power source in a wider range, especially in increasing the control input voltage. In a drive ... | 06/21/2005 |
| 6788088 | Semiconductor device equipped with current detection function While a power transistor which is positioned in an upper arm with respect to an inductive load and a power transistor which is positioned in a lower arm are both controlled to be OFF by a controller, reverse currents flowing in current mirror circuits which respecti... | 09/07/2004 |
| 6703805 | System for measuring the position of an electric motor An electric system utilizes dynamic impedance changes in windings of an electric motor to measure/monitor mechanical position. The method employs a bridge amplifier to measure voltage at a center node or windings against a voltage derived from a reference... | 03/09/2004 |
| 6680598 | Circuit for the speed recovery of a direct current motor and method using said circuit A circuit for the speed recovery of a direct current motor includes an output stage, output stage having a first pair of transistors, a second pair of transistors, and means a first circuit configured to detect a current circulating in the motor. The outp... | 01/20/2004 |
| 6664750 | D.C. motor bridge coil driver An H-type motor bridge coil driver circuit is implemented with an electronic switch in each leg segment of an H-shaped circuit, this bridge circuit having its side legs each connected between a power supply and ground, with the inductive load of a motor c... | 12/16/2003 |
| 6633144 | System and method for measuring parameters of a DC motor field A system and method determine the parameters of a field of a DC motor. The method comprises obtaining parameters of the DC motor; and performing an iterative processing loop, the iterative processing loop being performed n times. The iterative processing ... | 10/14/2003 |
| 6593711 | Electronic control arrangement A motorized assembly comprises first and second bridge circuits across which respective drive motors are connected. At least one auxiliary motor or actuator is connected between one arm of the first bridge circuit and one arm of the second bridge circuit ... | 07/15/2003 |
| 6518723 | H-bridge motor driving circuit An H-bridge motor driving circuit has, between a PWM comparator and a control circuit, first and second frequency dividers for frequency-dividing, by 2, an AND gate, OR gate, and first and second and second inverters. During a first period, the first and ... | 02/11/2003 |
| 6356048 | Method and device for controlling electric motors of the brushless direct-current type, particularly for moving the weft winding arm in weft feeders for weaving looms The method consists in determining the angular positions of the rotor, which are useful for switching the phase currents, by deducing them from the sampled reading of the phase voltages, and in measuring the current of each phase by deriving it from the d... | 03/12/2002 |
| 6316892 | Automatic door control system An automatic door control system which uses microcontrollers to control four drive transistors and a drive motor connected in an H-bridge circuit. The microcontrollers use pulse width modulation to control the speed of the drive motor.... | 11/13/2001 |
| 6307337 | Brushless dc motor assembly A brushless dc motor assembly including control electronics for allowing variable speed, user-controlled motor operation. The control electronics are connected to a control board which is mounted directly to the motor bearing bracket. Hall effect devices ... | 10/23/2001 |
| 6262546 | Variable threshold motor commutation pulse detection circuit An improved motor commutation pulse detection circuit for comparing a filtered motor current signal to a threshold value, where the circuit is responsive to the actual or expected amplitude of the commutation pulses for adjusting the motor current signal ... | 07/17/2001 |
| 6147465 | Microprocessor controlled single phase motor with external rotor having integral fan A motor powered by a dc power source has a stator having a single phase winding. A power switching circuit of the motor has power switches for selectively connecting the dc power source to the single phase winding. A permanent magnet rotor in magnetic cou... | 11/14/2000 |
| 6078154 | Circuitry for determining actuator position Circuitry (100, 100') for determining actuator position includes four MOS transistors (T1-T4) connected to each side of a bi-directional motor (10). The current flowing through the motor (10) at any given time is proportional to voltages developed across ... | 06/20/2000 |
| 6020715 | Control device for a brushless motor A motor driving power supplying section obtains an output voltage by switching-controlling a predetermined voltage outputted from a main power supply and smoothing a voltage thus switching-controlled. A driving transistor group includes a plurality of dri... | 02/01/2000 |
| 6011371 | Proportional integral fan controller for electronic device A controller drives a fan's motor to proportionally control fan speed based on changes in heat output from electrical components in a local environment. The controller is connected to a temperature sensor and the fan motor. The temperature sensor senses l... | 01/04/2000 |
| 5929581 | Proportional integral fan controller for computer A controller drives a fan's motor to proportionally control fan speed based on changes in heat output from electrical components in a local environment. The controller is connected to a temperature sensor and the fan motor. The temperature sensor senses l... | 07/27/1999 |
| 5889378 | Motor-assisted power steering apparatus A motor-assisted power steering apparatus includes a DC motor which is fixed to a heat conductive frame, a torque sensor for detecting steering torque and a control circuit for controlling current supplied to the motor. The control circuit includes a firs... | 03/30/1999 |
| 5818180 | Voice coil motor feedback control circuit A circuit for driving a voice coil motor used to position the heads of a disk drive is disclosed. The circuit consists of a an H-bridge circuit, a controller, and a feedback loop. The feedback loop prevents the BEMF from driving a voltage on the voice coi... | 10/06/1998 |
| 5760555 | Motor drive unit used for camera and accessory thereof A motor drive unit is provided with a bridge circuit including series connected first and second MOS transistors, series connected third and fourth MOS transistors, a DC motor connected between a junction of the first and second MOS transistors and a junc... | 06/02/1998 |
| 5631527 | Voice coil motor feedback control circuit A circuit for driving a voice coil motor used to position the heads of a disk drive is disclosed. The circuit consists of a an H-bridge circuit, a controller, and a feedback loop. The feedback loop prevents the BEMF from driving a voltage on the voice coi... | 05/20/1997 |
| 5631528 | Elimination of motor negative voltages during motor brake A method for sensing motor commutation pulses during motor braking without creating negative voltages, which some junction isolated technologies substantially cannot tolerate. For instance, a commutation pulse sensing circuit containing junction isolated ... | 05/20/1997 |
| 5627758 | Vector control board for an electric vehicle propulsion system motor controller A vector control board for an electric vehicle propulsion system motor controller comprising a microcontroller for generating torque requests, a digital signal processor for receiving the torque requests from the microcontroller and for generating phase v... | 05/06/1997 |
| 5600216 | Bridge circuit for driving a brushless DC motor The invention pertains to a bridge circuit and a drive circuit for it, in particular for driving a brushless DC motor. The bridge circuit exclusively consists of n-channel field-effect transistors. An auxiliary potential generated by at least one potentia... | 02/04/1997 |
| 5532562 | Apparatus for controlling DC motor with H-bridge switching circuit A control circuit for an H-bridge circuit comprises a single capacitor, a charge/discharge circuit for charging/discharging the capacitor in response to a control command signal, a voltage detector circuit for detecting a voltage appearing across the capa... | 07/02/1996 |
| 5493487 | Electronic switching circuit A pulse-width modulated (PWM) circuit provides current through a load by opening and closing main electronic switches which connect the load to a power supply. Each main electronic switch connects with an auxiliary switch, connected in series with a diode... | 02/20/1996 |
| 5471122 | DC-motor bridge driver with end-of-braking detector A full-bridge driver, and especially an entirely integrated bridge driver, for driving DC motors in either direction is capable of automatically braking the motor when the motor direction is to be reversed. The bridge circuit is of "H" configuration and h... | 11/28/1995 |
| 5459654 | Apparatus for generating positive and negative supply rails from operating motor control circuit A motor control circuit is used to generate positive and negative voltage supply rails. The motor control circuit contains two halfbridges, each of which contains a pair of MOSFETs connected in series, each of the MOSFETs being formed without the customar... | 10/17/1995 |
