Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Application No. | Application Title | Issue Date |
| 20120019177 | Power Tool Having An Electric Brake The invention relates to a method for decelerating a drive movement of a power tool and to a power tool suitable for carrying out the method, having a drive driven by a motor, an energy supply device for the provision of electrical energy, a controller having a motor co... | 01/26/2012 |
| 20120013278 | RESISTORLESS DYNAMIC MOTOR BRAKING SYSTEM AND METHOD Systems and methods are provided for regenerative motor braking. The regenerative braking systems and methods allow the braking torque of a multi-phase motor to be controlled while keeping currents to acceptable levels and without supplying electrical energy back to the... | 01/19/2012 |
| 20110203754 | Method for Operating a Motorized Roller Shade The present invention advantageously provides methods for manually and/or remotely controlling a motorized roller shade that includes a shade attached to a shade tube, a DC gear motor disposed within the shade tube and a microcontroller. One method includes detecting a ... | 08/25/2011 |
| 20110181213 | FAN SYSTEM AND BRAKE CONTROL CIRCUIT THEREOF A fan system including a motor with a coil, a storage unit, a driver, and a buffer circuit is provided. The coil module has a first connection terminal and a second connection terminal. The storage unit electrically couples with a voltage source, stores electrical energ... | 07/28/2011 |
| 20110068721 | Drive device A driving device for a hatch in a vehicle, with a housing tube connected to a base part or to a movable structural component part, a protective tube connected to the movable structural component part or to the base part, a spindle drive having a threaded spindle and a s... | 03/24/2011 |
| 20100309451 | POSITIONING DEVICE, LITHOGRAPHIC APPARATUS USING SAME, AND DEVICE MANUFACTURING METHOD The present invention provides a positioning device for positioning a table, including a base, a motor that drives the table in the driving area on the base, a position sensor that detects the position of the table, and a control unit that controls the motor. The contro... | 12/09/2010 |
| 20100232076 | 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 determine electrical condition of the conduction path. At least one selectable i... | 09/16/2010 |
| 20100194315 | POWER TOOLS One aspect according to the present invention includes a power tool including a control device that can output a brake operation signal to a DC motor to apply a short-circuit brake thereto in response to turning off an operation switch. The brake operation signal is sto... | 08/05/2010 |
| 20100181949 | MOTOR CONTROL MECHANISM FOR ELECTRIC VEHICLES An apparatus for controlling a wheel motor is provided. A plurality of switches is provided for controlling a direction of current through motor coils of the wheel motor. A brushless motor control circuit is connected to each of the plurality of switches. Responsive to ... | 07/22/2010 |
| 20100171452 | MOTOR CONTROL CIRCUIT, MOTOR SYSTEM, AND MOTOR CONTROL METHOD In a motor control circuit which controls energization of a coil on the basis of a detection result of a rotor position, control is performed so that continuous rotation of the rotor by inertia is suppressed, rotation is stopped quickly, and reverse rotation of the roto... | 07/08/2010 |
| 20100123419 | ASYMMETRICAL DRIVER A drive circuit having asymmetrical drivers. In an embodiment, a brushless DC motor may be driven by a drive circuit having three high-side MOSFETs and three low-side MOSFETs. A driver controller turns the MOSFETs on and off according to a drive algorithm such that phas... | 05/20/2010 |
| 20100066279 | 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. The... | 03/18/2010 |
| 20090321445 | Container with buffered cover A container, adapted to be opened/closed automatically by induction actuated, includes a container body, cover, motor and actuating device, wherein the motor is connected to the driven element of the cover through the actuating device. The dustbin includes a sensing and... | 12/31/2009 |
| 20090315491 | ELECTRIC MOTOR An electric motor has a DC link circuit (30, 32), a permanent-magnet rotor (104), and a control circuit having a full bridge (114). A program-controlled calculation arrangement (80) is configured to supply the semiconductor switches of a firs... | 12/24/2009 |
| 20090310264 | MOTORISED BARRIER ROLLER A fire or smoke barrier 1 has a curtain 2 deployed from a motorised 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 6. 12/17/2009 | |
| 20090309527 | METHOD AND SYSTEM FOR DYNAMIC MOTOR BRAKING A method of dynamic motor braking is disclosed herein. The method comprises: dissipating reverse energy in a motor within motor windings during a non-current supplying period of a commutation sequence by intermittently shorting the motor windings. The motor windings are... | 12/17/2009 |
| 20090308628 | ROTARY TOOL DRIVEN BY BRUSHLESS MOTOR To provide a rotary tool driven by a brushless motor with which constant torque tightening work for screws or the like can always be performed properly and efficiently, in which overall downsizing and improved torque control precision enhancement can easily be achieved,... | 12/17/2009 |
| 20090230897 | Electric motor An electric motor for a textile machine can be operated as a generator if the supply voltage fails. The electric motor comprises a rotor configured as the motor armature and a motor phase control circuit comprising a plurality of semiconductor components wherein the ele... | 09/17/2009 |
| 20090218897 | DAMPER The invention relates to a device for damping the movement of a movable element (1) relative to a fixed element (3). The device comprises means for generating an electric current changing with the speed of movement of the movable element (1) relativ... | 09/03/2009 |
| 20090167218 | METHOD AND APPARATUS FOR BRAKING A MOTOR The invention relates to a method and an arrangement for braking a synchronous motor (4) used with a frequency converter (2). The braking current of the motor (4) is controlled by connecting only the negative changeover contacts (10) of the i... | 07/02/2009 |
| 20090079195 | WIND POWER GENERATOR When a wind velocity sensor detects a wind velocity higher than a predetermined level, a timer device starts a waiting timer function during an operation timer period shorter than the waiting timer period. After the waiting timer period is over, the waiting timer functi... | 03/26/2009 |
| 20090045762 | MOTOR DRIVE CIRCUIT, METHOD, AND COOLING DEVICE USING THE SAME A drive signal generation circuit generates drive signals that control ON and OFF states of transistors of a H-bridge circuit, in accordance with a target value of torque. A driver circuit alternatively turns ON and OFF high side transistors, and low side transistors of... | 02/19/2009 |
| 20070216329 | Motor control apparatus, motor control method, hard disk drive testing apparatus, and storage device manufacturing method A motor control apparatus that drives and controls a holeless DC motor is disclosed. The motor control apparatus includes a breaking part configured to break the DC holeless motor, a detection part configured to detect whether the DC holeless motor is in a near halt rot... | 09/20/2007 |
| 20050189895 | Motor control device and motor control method If a traveling speed of a carriage calculated by a speed converter is larger than an estimated speed in a deceleration section, braking is conducted by a braking method corresponding to a manipulated variable generated by a drive control unit. Owing to this type of brak... | 09/01/2005 |
| 20050184692 | Instantaneous fan stopping method and structure thereof The present invention provides an instantaneous fan stopping method and structure thereof. The method and structure can eliminate the inertial rotating state of the fan when the power supplied to the fan is cut off. In accordance with the present invention, a closed cir... | 08/25/2005 |
| 20050140320 | Drive control device for direct current motor A direct current motor has plural coils and is rotationally driven by selectively switching a phase of the coils in which electricity is flowing. The drive control device for the direct current motor controls an amount of electricity applied to the coil in the phase by ... | 06/30/2005 |
