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| Number | Title | Issue Date |
| 7911164 | Circuit installation capable of full voltage activation, division voltage operation and delayed breaking A circuit installation that executes full voltage activation, division voltage operation, and delayed breaking brake to electric load by increasing the power to the load activated to promote its activation performance or reducing operation power in the course of ope... | 03/22/2011 |
| 7839105 | Circuit installation capable of full voltage activation, division voltage operation and delayed breaking A circuit installation that executes full voltage activation, division voltage operation, and delayed breaking brake to electric load by increasing the power to the load activated to promote its activation performance or reducing operation power in the course of ope... | 11/23/2010 |
| 7340330 | Hybrid type vehicle driving controller, hybrid type vehicle driving control method and its program The invention has an engine maximum torque calculating processor for calculating plural engine maximum torques showing a maximum value of engine torque, and an engine limit torque calculating processor for calculating a minimum value of the respective engine maximum... | 03/04/2008 |
| 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 |
| 7275501 | System and method using capacitors to power an automatic feeder system A method and apparatus relates to systems powered by energy stored in capacitors. The capacitors may be charged using any desired power source. The system does not require batteries, which increases the reliability and life span of the system. In one example, an aut... | 10/02/2007 |
| 7268507 | Motor controller A DC power supply, a DC motor driven by DC voltage outputted from the DC power supply, and a control unit outputting a drive control signal to drive the DC motor are provided. A motor drive switch is provided between the DC power supply and the DC motor, and a brake... | 09/11/2007 |
| 7170249 | Electrical phase compensation in BEMF spindle motor control A method and apparatus for compensating for the asymmetrical phases of a spindle motor in a disc drive are provided. With the apparatus and method, compensation values are learned by sampling speed data during a period of operation of the disc drive where the speed ... | 01/30/2007 |
| 7157871 | Intermittent drive control apparatus of motor Rotation of a capstan motor is detected by a frequency detector, and supplied to a CPU as a rotation detection signal CFG. The CPU derives a period of the rotation detection signal CFG, calculates an average rotational speed of the capstan motor on the basis of the ... | 01/02/2007 |
| 7122988 | Rotation drive device and rotation drive method This rotation driving apparatus includes a torque generating circuit 72 for generating a torque of a servo motor 30 with voltage supply from a power source 71 and a motor control circuit 73 for controlling rotation of the motor. In the to... | 10/17/2006 |
| 7088064 | Method for the orientation of a spindle and numerical control device of a machine tool embodied for the method for the orientation of the spindle A method for the orientation of a spindle of a numerically controlled and rapidly rotating spindle by which the spindle is brought from an initial rotational speed into a predetermined position of rest. The method includes performing a first phase of orientation of ... | 08/08/2006 |
| 7039976 | Braking control system for a washing machine An inner tub of a washing machine is rapidly braked during a portion of a deceleration phase following an extraction phase of an overall spin cycle. A controller establishes the braking operation over a critical speed band or resonant frequency zone during which exc... | 05/09/2006 |
| 7042177 | Method and system for electronic braking of an electric motor having no permanent magnets System for braking either linear or rotary electric motor having no permanent magnets comprising at least one servo amplifier and an electronic circuit for generating a pulsed control signal for controlling the braking of the motor. The electronic circuit of the pre... | 05/09/2006 |
| 7005817 | Energy conserving disc drive A disc drive includes a disc mounted to a rotatable spindle, a motor coupled to the spindle, and motor control circuitry. The motor has a motoring mode in which it rotates the spindle and a braking mode in which is decelerates the rotating spindle and generates powe... | 02/28/2006 |
| 6998805 | Motor stop control device The invention is a motor stop control device for a rotating reel type gaming machine 1 which includes a stepping motor 70 having two pairs of excitation phases as a driving source of reels 3 having a plurality of symbols drawn thereon and in whi... | 02/14/2006 |
| 6917171 | Control device and method of stopping spindle motor of an optical disc system A control device and a method of stopping the spindle motor or an optical disc system. The control device primarily includes an optical disc control chip, a motor driving circuit and a spindle motor. The optical disc control chip generates and delivers a spindle mot... | 07/12/2005 |
| 6917182 | Method and system for providing induction charging having improved efficiency A battery charging system (250) for use with an induction charger (210). The battery charging system can include a secondary coil (252) having a plurality of turns for receiving magnetic flux produced by a primary coil (220) of the induct... | 07/12/2005 |
| 6831432 | Motor driving device and motor driving method Brake mode switching signal production means detects the number of revolutions per unit time of a rotor according to a change in a positional relationship between motor windings of a plurality of phases and the rotor so as to output first and second brake mode switc... | 12/14/2004 |
| 6753668 | Reduced profile drive assembly for garage door operator and method of assembly A garage door drive assembly for moving a linkage arm connected to a garage door, the assembly being adapted for shipping in a partially assembled condition in at least a box for on-site installation, the assembly has a longitudinally-extending rail with laterally e... | 06/22/2004 |
| 6700340 | Control circuit for a coffee grinder A control circuit controls a coffee grinder having a grinder motor. The control circuit includes a timer portion and a first switch. The first switch functions as a two-condition switch to place the control circuit in one of (1) an off condition when the ... | 03/02/2004 |
| 6545444 | Device and method for utilizing a monopole motor to create back EMF to charge batteries A back EMF monopole motor and method using a rotor containing magnets all of the same polarity and in a monopole condition when in momentary apposition with a magnetized pole piece of a stator having the same polarity, said stator comprised of a coil with... | 04/08/2003 |
| 6498448 | Motor break releasing device A motor brake releasing device includes an electromagnetic brake for locking a motor shaft and a switch mounted between the electromagnetic brake and a releasing-power-supply for the brake. The switch can be operated by an AND signal produced by a motor d... | 12/24/2002 |
| 6456032 | Method for controlling a motor roller A motor driver for drive-controlling a brushless motor being provided with a delay circuit that detects the motor pulse. When a stop signal is inputted, a transistor is activated, which in turn activates an electric brake to brake the brushless motor, whi... | 09/24/2002 |
| 6157153 | Motor driver A motor driver has a braking control circuit. The braking control circuit shuts off the supply of an electric current to the coils included in the motor when a motor control signal shifts to a predetermined level and, after a predetermined length of time ... | 12/05/2000 |
| 6140784 | Power off velocity control for disk drives A method and circuit for controlling a voice coil motor (VCM) for a disk drive actuator assembly such that the actuator assembly moves to a landing area at a constant velocity when the disk drive loses power. The circuit includes a sense amplifier for sen... | 10/31/2000 |
| 6104153 | Disk drive employing method of spinning down its spindle motor to reduce the time required for spinning it down and subsequently spinning it up A disk drive employs a method of operating a spindle motor to respond to a spin-down command to reduce the time required for spinning down and subsequently spinning up the spindle motor. The disk drive is connectable to a power supply having a fixed DC vo... | 08/15/2000 |
| 6046559 | Motor control method and disk unit A motor control method stops rotation of a motor which rotates in a forward direction by applying a brake signal for rotating the motor in a reverse direction. The motor control method detects a power supply voltage, and corrects a brake signal applying t... | 04/04/2000 |
| 6037728 | Electrical braking and energy storage for moving vehicles A system for electrical braking and the storage for reuse of the braking energy is disclosed using alternating current (AC) rather than direct current (DC) generators coupled to the wheels of the vehicle to be braked. Upon braking, the AC generators feed ... | 03/14/2000 |
| 5894204 | Spindle motor control method and disk unit A spindle motor control method stops a spindle motor which rotates in a forward direction in response to a rotation signal. The spindle motor control method includes two steps. First, a brake signal is supplied to the spindle motor for rotating the spindl... | 04/13/1999 |
| 5838124 | Systems and methods for braking of actuator and brushless DC motor therein A brushless DC motor is controlled by determining a speed of the motor and a line voltage supplying drivers of the motor. Based upon these determined values and predetermined motor performance data, a maximum PWM on-time is determined for drive signals su... | 11/17/1998 |
| 5804940 | Device designed to compensate for non-linearity of machine shafts A method for the numerical control of machines with several axes, in particular machine tools and robots, to compensate for the inaccuracies occurring when the axes are reversed, wherein varying friction conditions, as well as slackness and torsional effe... | 09/08/1998 |
| 5760566 | Control device for stopping the operation of a single-phase asynchronous motor with a capacitor The invention relates to a control device for stopping the operation of a single-phase asynchronous motor with a capacitor in the event an overload of this motor with respect to a threshold value is detected. This device is characterized in that it includ... | 06/02/1998 |
| 5712539 | Digital acoustic noise reduction in electric motors driven by switching power amplifiers A system and method is provided for controlling a brushless DC motor (100), the motor being of the type having a plurality of coils (25, 26, 27) and a switching amplifier coil driving circuit (25A, 26A, 27A) including a plurality of transistors (21, 22, 2... | 01/27/1998 |
| 5708339 | Bag neck gathering stop A bag neck tying device for tying a ribbon dispensed from a spool about a gathered neck. A pulley and proximity switch are mounted to prevent the completion of a tying cycle if a bag neck is not properly gathered and ready to be tied.... | 01/13/1998 |
| 5587640 | Delayed safety braking apparatus for a servomotor control system A servomotor control system is set forth that assists in overcoming the problem of servomotor shut down during a failure of the programmable control system and/or servo-amplifier. The presently disclosed servomotor control system includes a programmable c... | 12/24/1996 |
| 5495156 | Actuator retraction circuit Method and apparatus for retracting an actuator comprising determining back emf voltage generated by the actuator motor; applying the determined voltage to a capacitor-resistor network; applying a holding voltage to the capacitor-resistor network. The app... | 02/27/1996 |
| 5449992 | Braking circuit for an electric motor A braking circuit for an electric motor includes a braking device for being connected in a circuit for braking the electric motor, a braking switch including first and second changeover switches for switching between a motor mode and a braking mode, and a... | 09/12/1995 |
| 5426355 | Power-off motor deceleration control system A system (20) for controlling deceleration of a motor (22) during an abrupt power-off condition includes a processor (40), a motor control circuit (50), and a secondary power source (70). During normal power-on operation and based on currently prevailing ... | 06/20/1995 |
| 5424622 | Dynamic brake assembly A method for dynamically braking a motor, the motor having a plurality of terminals and receiving an input alternating current voltage waveform, by detecting the zero crossing of the input alternating current voltage waveform and for a plurality of positi... | 06/13/1995 |
| 5374885 | Method and apparatus for braking a rotary component in a textile fiber processing machine An apparatus for braking a rotary component of a fiber processing machine includes an asynchronous motor having a stator winding and an output shaft connected to the rotary component; a direct current generating device having an output connectable to the ... | 12/20/1994 |
| 5001408 | Control device for indexing rotor on balancing machine A control device is associated with a dynamic balancing machine for indexing a rotor being examined for unbalance. The control device determines the angular position of unbalance of the rotor during an unbalance measurement run and stops the rotation of t... | 03/19/1991 |
