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| Number | Title | Issue Date |
| 7592763 | Motor relay operation A motor receives power through two or more relays connected to a power source. A switch-operated logic circuit is powered by a relay power source and connects to the relays. To start the motor, the switch is pressed, causing the logic circuit to close the relays seq... | 09/22/2009 |
| 7307401 | Method and apparatus for PWM control of voltage source inverter PWM methods and apparatus are provided for loss minimized control of AC motors taking into consideration inverter non-linear limitations. The method comprises providing a voltage to the AC motor based on a switching cycle, adding a duty cycle of a zero vector to eac... | 12/11/2007 |
| 7268506 | Power window system The power window system moves a window glass in opening and closing directions in response to operation of an opening and closing instruction switch. The power window system includes a measurement device for obtaining an open degree of the window glass and a control... | 09/11/2007 |
| 7196611 | Barrier movement operator human interface method and apparatus Improvements in human interaction with barrier movement operators are disclosed. A controller of the barrier movement operator is capable of a number of learning modes in which the controller cooperates with a user to learn operating parameters. The controller guide... | 03/27/2007 |
| 7091683 | Method of monitoring and controlling the seating of screws to the optimum point of grip independent of screw size and material density A method of controlling a motor (106) used to drive a screwdriver bit (105) such that screws (107) are seated to the optimum point of grip between the screw (107) and the work piece material. An electronic control circuit controls the spe... | 08/15/2006 |
| 7051399 | Cleaner cartridge A cleaner cartridge includes a container having an interior cavity, in which cleaning agent can be stored. A first end of conduit is fluidically coupled to the interior cavity. A second end of the conduit is connectable to a chemical dispenser. ... | 05/30/2006 |
| 7053570 | Control circuit for a dual directional direct current motor employing a single alternating current power source A control circuit operates a dual directional DC motor from an AC power source. A controller has first and second position indication inputs adapted to receive respective first and second position indications. The controller also has first and second direction outpu... | 05/30/2006 |
| 6930458 | Apparatus for controlling deceleration of DC motor An apparatus for controlling deceleration of a DC motor which is driven in a forward operating direction with a forward-drive electric current applied thereto by a forward driving device, wherein the forward motor driving device applies the forward-drive electric cu... | 08/16/2005 |
| 6922032 | Electric motor control device In the driving operation of a sensorless three-phase motor to be used in a rotation at a comparatively low speed (approximately 2000 RPM or less) and to be bipolar driven, the number of rotations and a rotating position are accurately detected from an induced voltag... | 07/26/2005 |
| 6917174 | Cost-effective measurement of large machine currents The increasing use of electrically powered vehicles has created a need for inexpensively and effectively measuring high currents for motor control, as for example digital motor control. Because the high operating voltages of traction motors, the motor current sensor... | 07/12/2005 |
| 6909573 | Disk drive including means for preventing rotation A motor controller includes DC motor, driving mechanism, voltage generator circuit and control unit. The driving mechanism moves an object having a predetermined mass against a load applied to the object and by transmitting a rotational force of the motor to the obj... | 06/21/2005 |
| 6859005 | Garbage container with automatic door operator A garbage container includes a base section for collecting garbage and a lid section attachable to the base section. The lid section includes an access door pivotally operable therewith. The garbage container further includes a sensor connected to the top surface of... | 02/22/2005 |
| 6803733 | Pillar-mounted power door lock and power window system for a vehicle A vehicle power window and power door lock system includes a vehicle pillar adapted for use between openable and closable vehicle doors and a single lock actuation assembly in the pillar adapted for engagement with a front door lock latch assembly on a front door an... | 10/12/2004 |
| 6781342 | System and method for soft starting a three phase motor A three phase motor starting system is provided to reduce the in-rush current to the motor in order to obtain a soft start of the motor. The soft start of the motor equates to reduced impact forces on motor parts and device components connected to the motor during s... | 08/24/2004 |
| 6657406 | Soft start control method for a motor-driven actuator A method of operation for a motor-driven worm gear actuator coupled to a load device energizes the motor in a series of pulses during an initial period of motor operation when reversal of the motor is commanded. The pulsed energization produces a slow ini... | 12/02/2003 |
| 6580241 | Method of detecting pinching of object in power window device In a power window device an MCU detects motor torque values one by one when a window is opened and closed, compares the detected motor torque values with base values set to the travel regions and stops or reverses a motor determining that an object is pin... | 06/17/2003 |
| 6504331 | Drive mechanism for transaction printer A compact drive mechanism for both driving a paper web and severing a printed receipt in a transaction or point-of-sales printer. Both driving the paper web and cutting the printed receipt is accomplished through a bi-directional stepper motor that is ope... | 01/07/2003 |
| 6426602 | Minimization of motor torque ripple due to unbalanced conditions A method of minimizing the torque ripple produced by unbalanced phase currents in a sinusoidally excited motor is disclosed. The method comprises measuring the position of the motor; sampling the phase currents of the motor generating thereby at least one... | 07/30/2002 |
| 6366041 | Railway switch machine motor control apparatus A motor control apparatus for a reversible motor of a railway switch machine includes a conditional power source having an output voltage. A motor control circuit includes inputs for inputting the voltage from the power source, inputs for inputting a norm... | 04/02/2002 |
| 6252363 | Circuit for timed position control of device driven by a DC motor The present invention relates to an electronic circuit that interrupts the application of electrical power to a motor after a predetermined period of time. The electronic circuit is disposed between a motor which drives a device from an initial position t... | 06/26/2001 |
| 6246194 | Method and system for detecting an object in an automotive window A method and system for directly determining the presence of an object between a window and its respective frame during closing of the window is disclosed. A sensor is provided within the frame to determine a length of the frame being compressed when the ... | 06/12/2001 |
| 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 |
| 5414334 | Control device for an asynchronous roller-blind motor The present invention provides controls for driving roller blinds, rolling shutters and doors. The controls include a two directional motor, a control panel, switches, power supply, and a logic processing unit which are all interconnected to allow the use... | 05/09/1995 |
| 5329075 | Elevator door control apparatus An elevator door control apparatus includes at least one door safety device for detecting whether elevator doors are safe; an elevator control circuit for outputting a door-open/close command; and a door control circuit for controlling the opening/closing... | 07/12/1994 |
| 5164644 | Apparatus for controlling a ceiling fan The improvement of a remotely controlled ceiling fan is achieved mainly by means of a function control IC communicating with TRIAC Q8, TRIAC Q9 and TRIAC Q10 of the speed-changing device via lines Q5, Q6 | 11/17/1992 |
| 5142214 | Synchronous motor having selectable rotation direction A synchronous motor is divulged whose direction of rotation may be chosen, comprising a rotor with permanent magnet and a stator with homopolar field, including a winding fed with an AC voltage. In response to a stopping order, a circuit controls the swit... | 08/25/1992 |
| 5130624 | Electronic control for an automatic washing machine with a reversing PSC motor A control for an automatic washing machine with a reversing permanent split capacitor (PSC) drive motor. Separate ferrite core sensors surround each of two PSC motor windings. A sense winding is threaded through both sensors. A brief output voltage is gen... | 07/14/1992 |
| 5005382 | Electromechanical motor reversing An electromechanical A.C. motor reverser having a timed cam-driven SPDT switch with the side terminals thereof connected to separate motor stator coils. The movement of the transfer blade between contacts to break one motor coil circuit and complete the o... | 04/09/1991 |
| 4952853 | Method and apparatus for sensing direct current of one polarity in a conductor and electronically commutated motor control responsive to sensed motor current Apparatus and method for generating a sensing signal which is a function of a direct current flowing in a particular direction in a conductor. A core inductively coupled to the conductor is subject to negative magnetic saturation after a period of time as... | 08/28/1990 |
| 4897882 | Motor control apparatus and method Motor control systems are commonly associated with motors found on electric industrial vehicles, such as lift trucks. Advantageously, the control of such motors should be optimized such that current is timely supplied to the motors in conjunction with sel... | 01/30/1990 |
| 4645014 | Amplitude changing apparatus The invention is directed to an apparatus for resetting the vibration amplitude of a hydraulically driven vibration device having two eccentric weights arranged on a rotating shaft and rotatable relative to each other. The amplitude-resetting arrangement ... | 02/24/1987 |
| 4628232 | Anti-plug reversing module An anti-plug reversing circuit for use with a variable speed D.C. motor which provides safe and fast motor reversing with dynamic braking. The circuit, by sensing counter-EMF, prevents the premature application of a voltage of opposite (reversing) polarit... | 12/09/1986 |
| 4514670 | Electric positioning motor control system, particularly automatic vehicle antenna extension system A commutator-type d-c motor has its line current connected through a sensing resistor (18) or transformer (18'), the pulses of which, upon energization, are counted in a counter (C) and also passed to a speed sensing circuit (S) in a control circuit (30),... | 04/30/1985 |
| 4507594 | DC servomotor position control An apparatus and method for position control by a DC servomotor having improved stiffness. An electric current (iR) of the servomotor is interpreted anew and defined as follows: ##EQU1## where θ is an observed rotation angle of the load (... | 03/26/1985 |
| 4499409 | Plugging defeat system for electric motors A plugging defeat system for use with a reversible electric motor having a motor shaft. A slipping clutch-type mechanism is used to sense the speed and direction of the motor and to selectively open forward or reverse enabling switches when the motor reac... | 02/12/1985 |
| 4496888 | Control system for a d.c. motor A d.c. motor control system, intended primarily for use in battery powered vehicles, includes a control switch (RL2a, RL2b) for varying the connections of the motor field winding (24) to determine the mode of operation of the motor and speed interlock mea... | 01/29/1985 |
| 4463293 | Method and apparatus for shutting off a power screwdriver A power screwdriver that is equipped with a spring coupling between the motor drive and the tool spindle, a signal that indicates that a certain value of torque has been overstepped, at which the screwdriver must be sopped, first causes reversal of the mo... | 07/31/1984 |
| 4415812 | Electric starting system An electric starting system for cranking an internal combustion engine by an electric cranking motor. The system prevents energization of the cranking motor following initial energization and subsequent deenergization by sensing the voltage generated by t... | 11/15/1983 |
| 4412158 | Speed control circuit for an electric power tool A method and apparatus for controlling the rotational speed of an electronically controlled power tool in both the forward and reverse direction. When the reversing switch is placed in the reverse direction, the electronic speed control circuit automatica... | 10/25/1983 |
| 4378855 | Multi-speed drive with forward/reverse lockout An improvement for electrically driven floor maintenance apparatus including means for varying the speed of the driving motors is disclosed. Two speed ranges are provided by switching means which change the interconnection of the drive motors from series ... | 04/05/1983 |
