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WO/2005/020424A1 |
A spike detection circuit (12) includes an A/D converter circuit (14) for converting an output from a differential amplifier circuit (A2) into a digital signal; and an offset calculation circuit (15) for setting, based on an output from ...
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WO/2005/015707A1 |
The invention relates to a control unit for an electric motor of an actuator. Said control unit is fitted with a control board and a capacitive energy store which can be charged by the supply network in order to supply power to the elect...
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WO/2005/011100A2 |
The invention relates to a speed control system for the motor of a fan and motor unit comprising a first and second transistors (3, 5) which are in parallel connected to each other and to a motor (1) through a continuous voltage source (...
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WO/2005/011099A2 |
A generator-motor apparatus (100) includes a control circuit (20), an alternator (50), electrode plates (83, 84), and switching devices (SW1 to SW6). The electrodes plates (83, 5 84) have a' substantial horseshoe shape, and are provided ...
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WO/2005/008878A1 |
A system is disclosed for driving a DC motor (15) under conditions of a controlled average current. An inductive element may be arranged for connection in series with the DC motor. A switch (14) is preferably coupled to the inductive ele...
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WO/2004/109902A1 |
The invention relates to a series resistor assembly (1) for an electric motor (M), in particular for an electrically driven ventilating fan in a vehicle. Said assembly comprises a series resistor (2) for controlling the RPM of the electr...
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WO/2004/107551A1 |
Even when an inverter device cannot be connected to a commercial power source or a control power source is cut off, it is possible to check and modify the setting state of a microcomputer and a peripheral circuit of the inverter device. ...
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WO/2004/102783A2 |
A linear power controller and related circuitry may be implemented to provide linear control of a variable DC electric motor. The controller and motor are coupled to form a closed loop for controlling the speed of the motor and for adjus...
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WO/2004/098261A2 |
A controller (28) for a doubly fed induction generator (12, 20) adjusts control signals to a rotor side converter (24) and line side converter (22) to adjust rotor current when a voltage transient on a utility grid (10) occurs, so that t...
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WO/2004/093287A1 |
A variable speed drive control system operates a variable speed drive to power a first load from a power source simultaneously powering a second load. An AC reactive power is monitored which may comprise or consist of an AC reactive powe...
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WO/2004/084397A2 |
Current through a motor (18) is sensed at (26) to create a voltage which is amplified at (30). The amplifier (30) is followed by a high pass filter (38) and a low pass filter (46). This recovers commutator pulses from the motor current, ...
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WO/2004/078508A1 |
The invention relates to a driving assembly comprising a wheel comprising a wheel shaft and driving means which when operative exert a driving moment on the wheel shaft, wherein a drive ratio, being the arm of the driving moment divided ...
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WO/2004/072130A2 |
According to the invention, for a simple actuator, the cumulative rotational angle of the rotor is calculated from the current operating values of the direct current motor, from a starting point at which a supply voltage is applied to th...
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WO/2004/070932A1 |
The invention relates to a method for reducing line-bound disturbances in pulse-width modulated control of an electric motor. A controlled pulse-width modulation signal in a clock cycle comprises one or several signal edges between a fir...
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WO/2004/070882A2 |
A multiphase motor has a plurality of ferromagnetically isolated stator electromagnets distributed about an axis of rotation. Successive ranges of speed during which the motor can be expected to operate are defined. A specific subset of ...
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WO/2004/070719A1 |
The invention relates to a tray mechanism consisting of sliding means comprising an electrical tray motor, for moving a tray - provided for containing a disc (for example an optical disc) on which information is recorded - from a project...
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WO/2004/068691A2 |
Disclosed is a method for triggering an electric motor by means of a pulse width modulation signal that has a specific triggering frequency and a specific pulse duty factor. The electric motor is triggered via a supply voltage line accor...
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WO/2004/064243A1 |
A device for controlling variable speed electric motors, particularly for hand held power tools and other miniaturised electrically powered apparatuses, comprises an electronic driver unit (5) connectable to the terminals (2, 3) of an el...
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WO/2004/055960A1 |
A rotating electrical machine, such as an aircraft starter-generator, includes an exciter that has its stator windings divided into a number of sections. A plurality of switches are electrically coupled to the exciter stator winding sect...
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WO/2004/049550A1 |
A speed controller for motor comprising a speed control section (12) for generating an original current command based on the difference between a detected speed of a motor (4) for driving a load (2) and a speed command of the motor (4), ...
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WO/2004/049551A1 |
A power control system (12) for an electric motor having at least one magnetic bearing includes a DC/DC converter (18) supplied from a DC link bus (179) connected to a main power supply (14), the bus (17) supplying power for the electric...
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WO/2004/045059A2 |
A permanent magnet motor includes salient pole stator cores. The poles and/or linking portions therebetween are wound with a plurality of winding coil sets. Mutually exclusive speed ranges are established between startup and a maximum sp...
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WO/2004/040746A1 |
Provided is a motor control circuit in which the circuit structure is not complicated, which has a favorable response to the phase difference signal, and in which the signal variation caused by heat is small. This rotation control circui...
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WO/2004/040747A1 |
The invention relates to a commutation method for an electric motor, especially a direct-current motor without a commutator, using a semiconductor bridge circuit consisting of switching elements (T1 to T4) and respectively parallel freew...
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WO2003100957A9 |
A power converter (500) for a switched reluctance motor or a permanent magnet brushless direct current (dc) motor including first and second partial circuits (553, 554) for forming multiple conduction circuits in cooperation with first a...
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WO2003100956A9 |
A method for identifying an operational phase of a motor (203) may include obtaining a first value of a signal that is indicative of the operational phase of the motor (203) and obtaining a second value of the signal after a period of ti...
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WO2004001515A9 |
A system and method for measuring fluid or gas flow rate, for the system where fluid or gas is pumped, such as gas monitoring instrument, via a conduit to a sensor. The flow of gas through a pump (14) is determined by measuring motor bac...
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WO2004004109A9 |
A system for controlling an electric motor comprises, in one embodiment, an encoder; a central processor in communication with said encoder; a module processor in communication with said central processor; feedback circuitry in communica...
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WO/2004/030200A1 |
A brushless DC fan motor capable of communicating with an external apparatus while simplifying the circuitry. A speed control command generating means (9) generating a command for controlling the rotational speed of the rotor comprises a...
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WO/2004/023639A1 |
A drive system for a three phase brushless motor uses an algorithm for position sensing which measures the inductance in the motor phases and determines the position from the measured inductances. In order to reduce acoustic noise, the i...
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WO2003100948B1 |
A two-phase switched reluctance motor (fig.4) with a pluraty of rotor poles (404) having asymmetric reluctance (405) about a central raidla axis of the respective rotor pole and a plurality of salient stator poles (402) having the same w...
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WO/2004/010762A2 |
An insect control system for controlling insects within a predetermined area (20). The system includes a plurality of insect control devices distributed throughout the predetermined area, the insect control devices including at least one...
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WO/2004/008617A1 |
A system (10) provides a variable output voltage to a DC brush motor. The system includes a DC brush motor (14), a DC voltage source (12), a step-up, step-down DC/DC converter (16) including a switch (18). The DC/DC converter is construc...
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WO/2003/100944A1 |
A rotor for an electrical motor (100) may include a plurality of salient radial field rotor poles (109) and a plurality of salient axial field rotor poles (110). The radial field rotor poles (109) and the axial field rotor poles (110) ar...
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WO/2003/100958A1 |
A power converter for a switched reluctance motor (SRM) or a permanent magnet brushless direct current (dc) motor (PMBDCM) that includes a front-end boost partial circuit (551) for connecting with a first phase winding of the motor (552)...
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WO/2003/090336A1 |
In particular in articles of furniture having at least an element which may be adjusted with a DC motor, preferably via a mechanical transmission, it is desirable to have a level of acoustic noise as low as possible. The power supply to ...
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WO/2003/087855A1 |
The invention relates to a method for measuring currents in a motor controller. Some current sensing devices placed on the motor wires or inside the motor controller provide low amplitude output signals thus complicating sampling and dat...
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WO/2003/088469A1 |
Pulse variable information is used to control at least obstacle detection and also, optionally, speed of movement of a movable barrier. In one embodiment, pursuant to a learning mode (50) the movable barrier is moved (51) and, while movi...
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WO/2003/084798A1 |
An apparatus for diagnosing the fault of a motor current sensing unit of a motor-driven power steering apparatus. Semiconductor switching devices (hereinafter referred to as devices) (T1 and T4) of an H bridge circuit constituting a moto...
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WO/2003/084044A2 |
A technique for reconstructing phase currents based on measurements of a DC bus current. Non-observable regions of DC bus current samples to reconstruct phase currents are reduced in size by using two phase space vector modulation. The n...
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WO/2003/077322A2 |
A block diagram of circuitry, including control circuits contained within package (33). Thus, MOSFETS (31) and (33) are provided with respective shoot-thru protection circuits (61) AND (62) respectively and with over current shut down ci...
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WO/2003/077408A1 |
A fully protected H-bridge for a d-c motor (30) consists of two high side MOSFETs and a control and logic IC on a first conductive heat sink all within a first package and two discrete low side MOSFETs. The entire bridge is controlled by...
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WO/2003/072388A1 |
A control system for individually controlling power from a single voltage source to a plurality of motors is described. A chopper circuit, in conjunction with the control system, generates drive−pulses, which operates the IGBT switchin...
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WO/2003/071669A2 |
The aim of the invention is to avoid the creation of narrowband stray radiation spectra caused by a pulse-width modulation control system (5) of a d.c. motor (1). To this end, switching means (8) are used to modulate the clock pulse freq...
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WO/2003/063323A1 |
The invention relates to a device for suppressing the radio-interference of an electric commutator, in particular a direct current motor (10). Said device comprises a rotor (12) that is supplied with current by means of brushes (14a, b) ...
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WO/2003/063334A1 |
A controller (10) using rectified AC voltage 820) to drive a DC motor (M). A first rectified produces a waveform (A) that passes through zero voltage in synchronization with the A.C. supply voltage (20). The first rectified voltage is ap...
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WO/2003/052921A1 |
Disclosed is a method and a circuit arrangement for carrying out a method to protect an electric motor (10) and/or a control circuit (12) thereof from an overload in an emergency operation mode. The inventive method and associated circui...
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WO/2003/050846A2 |
A selectively protected electrical system includes or operated with a power source(1514) , a load (1512), a power driver circuit (1506) for controllably transferring power from the power source (1514) to the load (1512), the power driver...
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WO/2003/047083A2 |
The invention relates to a control device for operating a load circuit comprising at least one electric motor. The control device has a control stage, which generates a pulse-width modulated control signal, and has a power stage, which s...
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WO/2003/044935A1 |
A control unit of controlling a direct-current load (M1), said control unit comprising a DC/DC bridge (B1) provided with controllable semiconductor switches (UT, UB, VT, VB, WT, WB) and having two bridge sections (B11, B12), one (B12) of...
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