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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 7595603 | Method and device for regulating a pump Electronic motor regulation for a pump with a multi-phase permanent-magnet synchronous motor (PMSM). The system is enabled to detect and estimate a rotor phase position and rotary speed. Foam or air operation is detected by way of fluctuations in the estimated rotar... | 09/29/2009 |
| 7586285 | Ground fault detection device for motor driving circuit A motor driving circuit includes an inverter circuit including switching devices connected in a bridge manner, electric-current detection resistances connected between the lower switching devices in the inverter circuit and the ground, so as to enable detection of t... | 09/08/2009 |
| 7576510 | Control method for a synchronous motor, particularly for circulation pumps The present invention relates to a control method for a synchronous electric motor with permanent-magnet rotor, particularly for fluid circulation pumps in conditioning systems and/or household appliances, wherein the application of predetermined voltage values to e... | 08/18/2009 |
| 7521888 | Electric motor controller for a domestic appliance The invention relates to a three-phase asynchronous electric motor for domestic appliances, comprising power elements, such as triacs or relays, for charge control. The power elements other than the relays are controlled by at least one microcontroller with the aid ... | 04/21/2009 |
| 7521887 | Vector controller for a permanent magnet synchronous motor, inverter module, and permanent magnet synchronous motor constant display system A vector controller for a permanent magnet synchronous motor uses current command values and detected currents of the d-axis and q-axis, a calculated frequency, and motor constant settings to control the output voltage of a power converter; the motor constants are i... | 04/21/2009 |
| 7443126 | Controller for synchronous machine A controller for a synchronous machine includes: a power converter; a synchronous machine driven by the power converter; a PWM modulation section for controlling the synchronous machine; a current detection section which detects a current conducted to the synchronou... | 10/28/2008 |
| 7439693 | Anomaly detection method and motor control device A control unit of a motor driver performs feedback control to supply current to a linear motor based on a detection value of a linear encoder. An anomaly detection unit monitors the supply current to the linear motor, and the anomaly detection unit detects anomaly o... | 10/21/2008 |
| 7439703 | Controller for synchronous machine A controller for a synchronous machine includes: a power converter; a synchronous machine driven by the power converter; a PWM modulation section for controlling the synchronous machine; a current detection section which detects a current conducted to the synchronou... | 10/21/2008 |
| 7378814 | Method for controlling a wound rotor synchronous motor A method for the control of a wound rotor synchronous motor comprises measuring a plurality of electromagnetic entities indicative of the operation of the motor, generating voltage on a stator of the motor to obtain a stator current, further generating a further vol... | 05/27/2008 |
| 7372233 | Method for operation of a converter circuit for a washing machine or a washer/drier, converter circuit, and washing appliance or washer/drier A method is provided for operating a converter circuit, in particular a pulse-width modulated frequency converter circuit having a DC voltage intermediate circuit, which controls two or more winding sections of a polyphase dynamo-electrical machine, in particular a ... | 05/13/2008 |
| 7365518 | Ion engine power supply A power supply for an ion engine comprises a multiphase alternator and a power converter comprising a voltage multiplier coupled to each phase of the alternator. Each voltage multiplier comprises one or more staged voltage doublers. The alternator phases may be coup... | 04/29/2008 |
| 7342378 | System and method for driving synchronous motor A driving apparatus of a synchronous motor fixes all the switching devices of an inverter at OFF in accordance with a value of an all-OFF control pulse signal outputted by a pulse generator. A motor current keeps flowing through free wheel diodes for a predetermined... | 03/11/2008 |
| 7294988 | Synchronous motor drive unit and a driving method thereof A rotary sensor that outputs two analog signals, such as one sine wave and one cosine wave and has multiple periods within one period of the electrical angle of a motor is employed. The motor is energized at each position for a specified length of time upon its star... | 11/13/2007 |
| 7292003 | Starter/generator with permanent magnet generator position indicator A motor control system for a wound field synchronous dynamoelectric machine used as an electrical starter and a generator for aeronautical engines that uses its integral auxiliary permanent magnet generator as an angular position sensor in its starting mode. ... | 11/06/2007 |
| 7282886 | Method and system for controlling permanent magnet motor drive systems Methods and system are provided for controlling permanent magnet motor drive systems. The method comprises the steps of adjusting a first current command in response to a first voltage error to produce a first adjusted current, adjusting a second current command in ... | 10/16/2007 |
| 7268513 | Motor/generator unit A motor/generator unit in which a motor/generator and an invertor part are integrated and the wiring of a field circuit part for supplying current to a winding on a rotor is rationalized. In a motor/generator unit in which a motor/generator body part having a field ... | 09/11/2007 |
| 7265511 | Motor control device A speed controller includes a speed integration compensation low-pass filter, an integral control system, a proportional control system, and a multiplication device means. The speed integration compensation low-pass filter has a transfer function corresponding to a ... | 09/04/2007 |
| 7262576 | Method for driving a synchronous electric motor in particular for fans A method drives a synchronous electric motor, particularly to start a fan/exhaust fan. The method includes measuring the supply voltage value of the electric motor windings being proportional to the mass flow rate. The method also includes measuring a real load angl... | 08/28/2007 |
| 7253583 | Controller for synchronous machine A controller for a synchronous machine includes: a power converter; a synchronous machine driven by the power converter; a PWM modulation section for controlling the synchronous machine; a current detection section which detects a current conducted to the synchronou... | 08/07/2007 |
| 7245104 | Position-sensorless motor control device A position-sensorless motor control device has a superposer that superposes, on the drive current with which the motor is driven, a superposed current having a different frequency than the drive current, a superposed component extractor that extracts, from the motor... | 07/17/2007 |
| 7235947 | Synchronous motor control method and synchronous motor control system A desired q-axis current is determined based on a desired torque, and a desired d-axis current is determined based on the rotating speed of a synchronous motor when the terminal voltage of the synchronous motor coincides with a predetermined maximum permissible volt... | 06/26/2007 |
| 7233124 | Motor drive inverter control apparatus A motor drive inverter control apparatus includes a rectifier circuit for rectifying an AC power supply, an inverter circuit driven by an output from the rectifier circuit, a motor driven by an output from the inverter circuit, a first capacitor coupled in parallel ... | 06/19/2007 |
| 7211985 | Training device On a training device, in particular for developing human muscles, having a torque-generating unit which comprises an electric motor and a reduction gearing, and whose output interacts with at least one training element offered to the exercising person, an electric m... | 05/01/2007 |
| 7194321 | Modular multi-axis motion control and driving system and method thereof A modular multi-axis motion control and driving system includes a control board having a DSP and Flash ROM; a plurality of driver boards connected to the control board though a bus, each board including a FPGA device and a plurality of MOSFET power amplifiers; a com... | 03/20/2007 |
| 7170256 | Motor control device In the control of a synchronous motor having a permanent magnet, an alternating current power supply voltage that is input to a power amplifier or a direct current link voltage of which input voltage is rectified is measured. A reactive current (a d-axis current) or... | 01/30/2007 |
| 7166974 | Method for controlling the firing angle of an electric motor Disclosed is a method for controlling the firing angle of a signle-phase AC powered electric motor which is triggered by means of at least one locking electronic switch, especially a triac (T1 and T4) located between the distribution voltage (UV | 01/23/2007 |
| 7161324 | Device for estimating pole position of synchronous motor An influence resulting from double saliency of an electric motor, i.e., an influence of a deviation of the axis of an alternating current due to a rotor magnetic pole position θ on the estimation of a magnetic pole position, is eliminated, and, in particular, the m... | 01/09/2007 |
| 7145310 | Method and system for controlling permanent magnet synchronous motor A system for controlling a permanent magnet synchronous motor calculates fundamental a d-axis (or q-axis) voltage command based on a difference between a d-axis (or q-axis) current command and a d-axis (or q-axis) current feedback signal, calculates a harmonic suppr... | 12/05/2006 |
| 7119512 | Switched reluctance machine control system and method A switched reluctance machine system includes a stator, a rotor situated to rotate relative to the stator and a plurality of phase windings situated in the stator. A power supply is connected to the phase windings via power converter and a controller outputs control... | 10/10/2006 |
| 7098616 | Control device for a motor unit of a food processor A control device includes a control module controlling a polarity switching unit connected electrically to a motor unit of a food processor to provide a first current path for an input power signal through the motor unit when the control module is operated in a proc... | 08/29/2006 |
| 7088077 | Position-sensorless control of interior permanent magnet machines A method of controlling an IPM machine having a salient rotor. Stator terminal signals are measured and rotated to obtain synchronous reference frame current signals. A rotor position is estimated based on an impedance generated using the rotor and included in the c... | 08/08/2006 |
| 7084591 | Electric drive control device, electric drive control method, and program of same An electric drive control device is provided with an electric machine having an asymmetrical salient pole, a current detecting portion, a phase converting device that converts the detected current into an axis current, and a current controlling device which generate... | 08/01/2006 |
| 7065437 | Current limit for an electric machine A method and apparatus for limiting current and voltage in a PM electric machine comprising: receiving a command indicative of a desired position control; obtaining a velocity value indicative of the rotational velocity of the electric machine; and computing a first... | 06/20/2006 |
| 7064504 | Control apparatus for brushless DC motor A control apparatus for a brushless DC motor that rotatably drives the brushless DC motor including a rotor having a permanent magnet, and a stator having stator windings of a plurality of phases that generate a rotating magnetic field for rotating the rotor, by a c... | 06/20/2006 |
| 7061736 | Method to project electronics from load dump A method for averting damage that may be caused by a transient energy surge during a load dump event, the method including detecting the load dump event and in response causing the consumption of transient excess energy due to the load dump event. ... | 06/13/2006 |
| 7026782 | Method and apparatus for controlling synchronous motor An apparatus is provided for controlling a synchronous motor. The apparatus comprises a first calculator calculating a voltage characteristic showing a characteristic of voltages to be applied to armature coils of a stator and a producer producing a command signal t... | 04/11/2006 |
| 6979975 | Rotation state detecting apparatus of a synchronous machine In a conventional rotation state detecting apparatus of a synchronous machine, since short-circuiting must be carried out twice or more when a rotation speed is detected, there have been problems in that it takes a time to detect a rotation state, and it takes a tim... | 12/27/2005 |
| 6960898 | Control unit for controlling a synchronous motor A control unit is provided that controls a motor that opens and closes a door of an electric train such that, if an abnormality is detected by a position sensor, continuation of its open/closing operation can be maintained. The control unit includes an arrangement f... | 11/01/2005 |
| 6958585 | Windshield wiper system activated by sensing rainwater A windshield wiper system activated by sensing rainwater via a rain sensor placed inside the wiping pattern when a multifunction switch lever is in automatic mode. A rain sensor module activates a relay for low speeds and/or a relay for high speeds depending on the ... | 10/25/2005 |
| 6954050 | Control method and control device of permanent-magnet type synchronous motor The object of the invention is to inhibit the axial displacement caused by the insufficiency of a control response angular frequency of a frequency arithmetic unit of a synchronous motor and realize high-precision torque control also in acceleration/deceleration. To... | 10/11/2005 |
