Abstract:
An architectural covering is provided. The architectural covering includes: shade material; the shade material operatively connected to a motor unit such that movement of the motor unit causes movement of the shade material; the motor unit comprising a DC motor and a shaft connected to the DC motor; a power supply unit electrically connected to the motor unit; a controller unit electrically connected to the motor unit, the controller unit having a microprocessor; and a rotation detector configured to detect rotation of the motor unit and upon detection of rotation of the motor unit transmit a signal to the microprocessor, wherein the microprocessor of the controller unit is configured to power an encoder unit in response to determination of manual movement of the shade material. A motor and control unit for an architectural covering may be provided.
Abstract:
A relay circuit is provided for operating a bidirectional dc motor (12) including an H-bridge relay circuit having a first and a second relay (18, 20). The first relay is capable of operatively engaging a first contact at a first time period to provide a first connection of the motor to a power source to operate the motor in a first mode. The second relay is capable of operatively engaging a second contact at a second time period to provide a second connection of the motor to the power source to operate the motor in a second mode. The relay circuit further includes a switch having at least one contact operatively engaging the first or second relay for effectuating the first or second connection, respectively. A third relay (16) is operatively associated with the switch to provide a third connection of the motor to the power source as the at least one contact operatively engages the first or second relay. The third connection is disconnected prior to disconnection of the first or second connection as the at least one contact disengages the first or second relay.
Abstract:
An electrical circuit for a switch having a lockout feature is described. The circuit permits both a primary operator and an auxiliary operator to operate a bi-directional motor (30) by activating separate low-current switches (SW1, SW2, SW3, SW4). The circuitry enables the primary operator to disable the auxiliary operator's ability to operate the motor by activating a lockout switch (L/O). With the lockout switch activated, the primary operator can operate the motor without interference from the auxiliary operator. High-current power switches (50, 52), activated via logic circuitry (70, 90) rather than by the operators, are used to complete a power circuit for energizing the motor.
Abstract:
Die Erfindung betrifft einer Antriebsvorrichtung zum Antreiben der Verstellbewegung zweier Fahrzeugteile relativ zueinander, mit einem Elektromotor, der zwei Motoranschlüsse aufweist und der im Betrieb einen Motorstrom aufnimmt, und einer Steuervorrichtung zum Steuern des Elektromotors, wobei die Steuervorrichtung ein Relais zum Ansteuern des Elektromotors aufweist, das ausgebildet ist, einen Motoranschluss mit einer Versorgungsspannung und den anderen Motoranschluss über einen Leitungsabschnitt mit einem Masseanschluss zu verbinden. Dabei ist eine Messschaltung (44, 45) vorgesehen, die ausgebildet ist, zur Messung des Motorstroms (I) den Spannungsabfall (V) an dem Relais (42) und/oder an dem Leitungsabschnitt (L) zwischen dem Relais (42) und dem Masseanschluss (GND) aufzunehmen. Die Erfindung betrifft zudem ein Verfahren zum Messen des Motorstroms an einer Antriebsvorrichtung zum Antreiben der Verstellbewegung zweier Fahrzeugteile relativ zueinander. Auf diese Weise werden eine Antriebsvorrichtung und ein Verfahren bereitgestellt, die in einfacher, kostengünstiger Weise möglichst ohne zusätzliche Bauteile die Messung des Motorstroms im Betrieb des Elektromotors erlauben.
Abstract:
The invention relates to a method and a device for detecting the rotation direction of a drive unit, especially of an adjustment drive in a motor vehicle. Said device comprises a motor (12) the rotation direction of which can be reversed by means of switches (20). At least one electrical voltage signal (42) is tapped between the switches (20) and the supply terminals (32, 34) of the motor (12) and is supplied to an evaluation unit (40) in order to determine the current direction of the motor current (30).
Abstract:
The invention relates to a drive unit for switching circuit breakers, especially disconnecting and/or grounding switches of medium-voltage switchgear, on and off. Said unit comprises a reversible d.c. motor and a switching device which contains two reversing switches which can be driven separately and mutually interlocked and which are each assigned to one direction of rotation of the d.c. motor. The contacts of said reversing switches carry out the current polarity reversal at the d.c. motor windings which is necessary for reversing the direction of rotation and, for the purpose of load switching, have power contactors with contacts having the required switching capacity. The all-or-nothing relays and safety switches are embodied as uniform, low-power relays (KL, KR) representing the direction of rotation, which each have at least two electrically decoupled relay contacts (RK) connected in parallel and to each of which a power factor capacitor is connected in parallel. Drive units of this kind are used in connection with switchgear for energy transmission and distribution.
Abstract:
A gearbox for small gears comprises a switch for reversing the direction of rotation of an engine. The shaft of the engine imparts a rotary motion to a gear drive shaft which, in one direction of rotation, imparts a rotary motion in the same direction to a gear drive shaft through a first gear stage and, in the opposite direction of rotation, imparts a rotary motion in the same direction to the said gear drive shaft through a second gear stage. To avoid abrupt changes of speed an to ensure continuous regulation, the speed of the engine (1) can be changed by a double-layer variable resistance (8) which can be adjusted by a sliding contact (7) coupled to the switch (5) for reversing the direction of rotation. In the first switching position of the switch (5) for reversing the direction of rotation, the sliding contact (7) contacts the first layer (8') of the resistance and in the other switching position it contacts the other layer (8''). The switching operations of the switch (5) for reversing the direction of rotation are carried out in the intermediate position between the two layers (8' 8'').
Abstract:
An apparatus for making a frozen dessert. The apparatus including a reservoir located within a chassis for receiving a liquid dessert mixture and a rotatable paddle located within the reservoir. The paddle can have a body coupled to at least one respective scraper element by a living hinge, such that the scraper element has a scraping edge that is radially-outward biased by the living hinge for abuttingly engaging a wall of the reservoir. The reservoir and the axis of rotation can be substantially horizontally directed, with a substantially vertically-orientated lid closing an opening of the reservoir, the lid defining an aperture for receiving the mixture or enabling egress of the frozen dessert.
Abstract:
The invention relates to a drive device for driving the adjustment movement of two vehicle parts relative to one another, having an electric motor which has two motor terminals and which takes up a motor current during operation, and a control device for controlling the electric motor, wherein the control device has a relay for actuating the electric motor, which relay is designed to connect one motor terminal to a supply voltage and the other motor terminal to an earth terminal via a line section. In this context, a measuring circuit (44, 45) is provided which is designed to record, for the purpose of measuring the motor current (I), the voltage drop (V) at the relay (42) and/or at the line section (L) between the relay (42) and the earth terminal (GND). The invention also relates to a method for measuring the motor current at a drive device for driving the adjustment movement of two vehicle parts relative to one another. In this way, a drive device and a method are made available which easily and cost-effectively permit measurement of the motor current during operation of the electric motor, as far as possible without additional components.
Abstract:
A digital motor control system utilizes time duration electric pulses generated by digital logic to control the motor speed and direction of rotation of a D. C. or A.C. motor. The digital logic produces width modulated pulses that can be connected to large or small electric motors by mechanical or electrical relays or switches to provide efficient motor control with little control circuit power loss. The mechanical or electrical switches are responsive to the digital logic to change motor direction or remove power from the motor windings. A variable control element such as a computer joystick can be utilized to control both direction and speed of the motor. The system can be configured as an open loop system or as a closed loop servo with a feed back element to control the rotational position of the motor.