| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 318474000 | Motor load, armature or primary or secondary circuit current | 24 |
| 20080246427 | Electromechanical Drive System, in Particular For Progressive Cavity Pumps For Oil Wells - The following invention is an electromechanical system ( | 10-09-2008 |
| 20090033268 | POWER SUPPLY SYSTEM WITH FUNCTION OF SHORT CIRCUIT DETECTION - There are provided upper and lower switching elements | 02-05-2009 |
| 20090160387 | Processing unit - The invention relates to a processing unit of a measuring signal related to conditions of an object controlled by power electronics. The processing unit comprises an interface with digital terminals, wherein the interface is provided with at least one terminal for a sensor which generates the measuring signal. Further, the processing unit comprises a calculating unit to which the interface is connected. The calculating unit is equipped with a real-time control system. In addition, the calculating unit comprises a general-purpose processor. | 06-25-2009 |
| 20090212729 | Method and device for controlling load and voltage in voice coils - A method for sensing and compensating for variances in load and voltage in a closed loop voice coil system ( | 08-27-2009 |
| 20100079095 | Motor circuit and electric power steering apparatus - In a steering control unit, a U-phase feed line branches into paired branch feed lines, phase-open MOSFETs are provided in middle portions of the branch feed lines, phase-open MOSFETs are provided in middle portions of a V-phase feed line and a W-phase feed line, and the phase-open MOSFETs are arranged in such a manner that parasitic diodes are in the same orientation with respect to a motor. When an abnormality occurs, all the phase-open MOSFETs are turned off. Then, a closed circuit, which includes phase coils and through which electric currents flow, is no longer present. | 04-01-2010 |
| 20110080130 | METHOD TO SAVE ENERGY FOR DEVICES WITH ROTATING OR RECIPROCATING MASSES - A system and method are disclosed for turning off the voltage to a pump jack electric motor during predetermined periods of time to save energy. In the method, the motor's response to closed-loop control may be evaluated over several pump strokes. The periods of the pump stroke when it is feasible to turn off the motor may be identified. The consistency of the measurements over several strokes may be evaluated. The motor may be turned off during predetermined periods on subsequent pump strokes when each pump stroke shows sufficiently similar behavior to that predicted during the closed-loop control process. The system may return to the closed-loop control process after a predetermined period of time to adjust to any changes in the system. | 04-07-2011 |
| 20120217919 | OPEN PHASE DETECTION SYSTEM AND METHOD FOR THREE-PHASE MOTOR - An open phase detection system and method for a three-phase motor is provided. The open phase detection system comprises: a signal generating unit coupled to the three-phase motor and configured to generate a driving signal for driving the three-phase motor; a detecting unit coupled to the signal generating unit, and configured to detect whether the signal generating unit generates the driving signal and to detect three-phase current values of the three-phase motor; and a determining unit coupled to the detecting unit, and configured to determine whether the three-phase motor has open phase according to the three phase current values detected by the detecting unit when the driving signal is detected. | 08-30-2012 |
| 20130057190 | DEVICE AND METHOD FOR REGULATING AN INCREASE IN THE OUTPUT TORQUE OVER TIME OF AN ELECTRIC DRIVE MOTOR - A device for regulating an increase in the output torque over time of an electric drive motor, including a monitoring unit for monitoring an operating variable of the electric drive motor, a regulating unit for regulating the operating variable for regulating the increase in output torque over time, a control unit for activating the regulating unit as a function of a time derivation of the monitored operating variable, the regulating unit being designed to be deactivated after a predetermined period of time. A method for regulating an increase in the output torque over time of an electric drive motor is also described. A corresponding tool and a computer program having program code for carrying out the method are also described. | 03-07-2013 |
| 20130328513 | METHOD FOR AUTOMATICALLY CONTROLLING AN ELECTROHYDRAULIC PRESSING TOOL - In the case of a method for automatically controlling an electrohydraulic pressing tool, in particular for producing pipe connections, to actuate the pressing tool a hydraulic piston is moved, in that fluid is pumped into a hydraulic cylinder by a hydraulic pump driven by an electric motor. When a limiting pressure in the hydraulic cylinder is reached, a pressure relief valve opens, and so the hydraulic fluid can flow into a reservoir. With the aid of a control device, a current drop at the motor is detected when the valve opens. The electric motor is switched off when the current falls by a predetermined value (ΔI) and/or decreases over a predetermined time period (Δt) after reaching a limiting current. | 12-12-2013 |
| 20140028233 | MOTOR DRIVE OVERCURRENT BLOCKING CIRCUIT, MOTOR DRIVING CIRCUIT AND METHOD FOR BLOCKING OVERCURRENT THEREOF - The present invention relates to a motor drive overcurrent blocking circuit, a motor driving circuit, and a method for blocking an overcurrent in a motor driving circuit. The motor drive overcurrent blocking circuit includes: a motor driving unit switched according to a driving control signal to drive a motor; an overcurrent sensing unit connected between a lower end of the sink switching element group and a ground to sense a current flowing in the turned-on switching element of the sink switching element group in the sensing terminal; and an overcurrent blocking unit turned on according to a voltage due to an overcurrent sensed by the overcurrent sensing unit and blocking the overcurrent by sinking the driving control signal applied to the turned-on switching element of the sink switching element group to the ground is provided. | 01-30-2014 |
| 20140300305 | MOTOR CONTROL DEVICE - A motor control device includes a drive circuit that supplies drive electric power in three phases to a motor, according to turning on or off of FETs; a microcomputer that generates control signals for turning on or off the FETs. The microcomputer detects a current-carrying failure in a U phase when all of (i) a condition that an absolute value of a U phase current value is less than a current determination value, (ii) a condition that a duty value corresponding to the U phase voltage command value is equal to or greater than a first duty determination value, or equal to or less than a second duty determination value; and (iii) a condition that the U phase voltage command value is deviated from the V phase and W phase voltage command values are satisfied. | 10-09-2014 |
| 20150340943 | ELECTRIC INTERFERENCE LIMITATION - A method and an arrangement for limiting the interference to a common electric power network, generated by a power electronics device, e.g. a frequency converter, which power electronics device comprises of at least one switch type component being able to change the output voltage value at a predefined permissible switching frequency range. The method comprises scanning through the permissible switching frequency range, recording measured common mode current values as a function of the switching frequency, and setting the final switching frequency of the switch type component out of a value where a local maximum value of the common mode current has been recorded. | 11-26-2015 |
| 318475000 | Mechanical-type detector (e.g., by yielding spring devices) | 2 |
| 20100320952 | OVERLOAD PROTECTION DEVICE FOR MOTOR - An overload protection device includes a motor, a transmitting shaft, a driving wheel, a resilient member, a sensor and a controller. The transmitting shaft including driving arm is meshed with the motor. The driving wheel is rotably engaged with the transmitting shaft at a distal end. The resilient member is connected to the driving arm at one end, and connected to the driving wheel at another end for driving the driving wheel to rotate. The sensor is mounted on the driving wheel and covered by the driving arm, and configured for and outputting a signal when the transmitting shaft is rotated relative to driving wheel. The controller is installed in the transmitting shaft and electrically coupled with the sensor for receiving the signal outputted from the sensor and shutting down the motor correspondingly. | 12-23-2010 |
| 20110001446 | DRIVING DEVICE WITH MOTOR CURRENT OVERLOAD PROTECTION ASSEMBLY - A driving device includes a motor, a rotatable shaft rotated by the motor, a driven member, a magnetic material spring, and a power source. The driven member sleeves on an end of the rotatable shaft, and includes an end surface with at least one latching groove defined thereon. The magnetic material spring sleeves the rotatable shaft, and includes a first end fixed to the rotatable shaft and an opposite second end capable of inserting into the latching groove of the driven member. The power source includes two electrodes. The motor and the spring are electrically connected in series between the two electrodes of the power source. | 01-06-2011 |
| 318476000 | In excess of a predetermined magnitude | 10 |
| 20080231220 | Image Forming Apparatus Appropriately Setting Current Value for Driving Motor - When a printing instruction is provided, a CPU causes a stepping motor M to drive a developer and calculates the value of a load of the stepping motor M before printing operations are performed. Then, CPU determines whether the value of the load is within a predetermined range stored in advance. If the value is not within the predetermined range, CPU causes a display to display an error message. | 09-25-2008 |
| 20080315817 | CONTROL SYSTEM FOR A HYBRID ELECTRIC VEHICLE AND A METHOD FOR CONTROLLING A HYBRID ELECTRIC VEHICLE - A control system and method for a hybrid electric vehicle. One example control system includes a current calculating module to calculate a current, the current being at least one of a current to drive a motor of the vehicle and a current generated by the motor, and a feed controller to selectively implement a first mode when the calculated current is below a predetermined current value and to selectively implement a second mode when the calculated current is more than the predetermined current value, wherein either the first feed circuit or the second feed circuit is used in the first mode and both the first feed circuit and the second feed circuit are used in the second mode. | 12-25-2008 |
| 20090284203 | METHOD FOR CONTROLLING AN OPENING LEAF OF A VEHICLE WITH AN ANTI-TRAP FUNCTION - A method for controlling an opening leaf of a vehicle. The method detects whether a predetermined event is occurring in the absence of a predetermined situation likenable to a trapping incident and, if appropriate, lowers a function of detecting the situation likenable to a trapping incident. | 11-19-2009 |
| 20100019713 | METHOD AND DEVICE FOR PROTECTION AGAINST JAMMING IN A MOTOR-DRIVEN LOCKING SYSTEM - The present invention relates to a method for protection against jamming in a motor-driven locking system and a device for the execution of the method. | 01-28-2010 |
| 20110127941 | POWER TOOL - A technique for providing a user with effective information in performing an operation is provided in a power tool having a speed change mechanism. A power tool has a speed change mechanism that switches a tool bit | 06-02-2011 |
| 20120280644 | INVERTER AND A METHOD FOR CONTROLLING AN ELECTRIC MACHINE - An inverter comprises output switches for generating motor phase currents for application to an electrical motor based on a commanded torque. A current sensor is arranged for detecting motor phase currents applied to the electrical motor by an inverter. A voltage sensor is configured for measuring voltages applied to the electrical motor by the inverter. An output port is capable of outputting output signals of the detected motor phase currents and measured voltages for processing by a vehicle controller. The output signals are suitable for input to a vehicle controller for determining whether or not to generate an override control signal. An input port is configured for receiving the override control signal from the vehicle controller. The input port is coupled to an override input module for switching off a supply of electrical energy to the electric motor. | 11-08-2012 |
| 20150061562 | MOTOR DRIVE UNIT - A motor drive unit includes a motor drive circuit that drives a motor by controlling on/off of current, a control unit generating a drive command signal for driving the motor, a current feedback circuit with the motor and outputs a comparison output signal based on comparison between a current detection signal of a motor current and a target value signal, a latch circuit that latches a current detection result based on the drive command signal and the comparison output signal, and a gate circuit for driving the motor drive circuit based on the drive command signal and a latch output signal output from the latch circuit. The control unit detects a failure of a current feedback system including the current feedback circuit and the latch circuit according to a state of the latch output signal inputted after a time measured based on the drive command signal reaches a predetermined time. | 03-05-2015 |
| 20150115856 | MOTOR DRIVE CONTROLLER AND MOTOR DRIVE CONTROL METHOD - An motor drive controller may include: A mode control unit calculating a pulse frequency of a pulse width modulation (PWM) signal provided from an outside and generating an operating signal according to the calculated pulse frequency of the PWM signal, a regulator receiving the operating signal, transitioning to an enable state based on the operating signal, and generating a driving voltage and a motor control module receiving the driving voltage from the regulator and controlling an operation of a motor. The mode control unit is configured to set up a sleep mask time using a clock signal provided from the outside and control the regulator to maintain the enable state during the sleep mask time. | 04-30-2015 |
| 20160099672 | INDEPENDENT PATHWAYS FOR DETECTING FAULT CONDITION IN ELECTRIC MOTOR - An electric motor system having substantially independent hardware-based and software-based pathways for detecting and initiating responses to fault conditions, such as over-current conditions, in an electric motor which is powered by a power inverter which is controlled by a power module and a microprocessor. Each pathway involves comparing a voltage, which is representative of an electric current flowing to the motor, to a predetermined maximum voltage, and if the former exceeds the latter using hardware or software to initiate shutting off the motor, such as by shutting off the power inverter. When one pathway detects a fault condition it may notify the other pathway, and the notified pathway may also initiate shutting off the motor. | 04-07-2016 |
| 318477000 | Intentionally increased load | 1 |
| 20130082632 | ELECTRIC POWER TOOL - An electric power tool includes a motor that rotary drives an output shaft; an operation unit to input a drive command of the motor; a torque setting device that sets an upper limit value of a rotational torque of the output shaft in accordance with a torque setting command; and a control device that drives the motor in one of a forward direction and a reverse direction in accordance with the drive command, and stops driving of the motor when the rotational torque of the output shaft has reached the upper limit value set by the torque setting device during driving of the motor. The torque setting device is configured to set the upper limit value such that the upper limit value during driving of the motor in the forward direction and the upper limit value during driving of the motor in the reverse direction are different. | 04-04-2013 |
