Abstract: A current control circuit for controlling a drive current supplied to an inductive load is provided. The current control circuit is configured to perform a first mode of controlling a duty of the drive current so as to be 100% until a current value of the drive current reaches a first target current value after a supply of the drive current is started, and a second mode of controlling the duty of the drive current to be a predetermined duty below 100% until the current value of the drive current reaches a second target current value that is greater than the first target current value after the current value of the drive current reaches the first target current value.

Abstract: A robot configured to navigate a surface, the robot comprising a movement mechanism; a logical map representing data about the surface and associating locations with one or more properties observed during navigation; an initialization module configured to establish an initial pose comprising an initial location and an initial orientation; a region covering module configured to cause the robot to move so as to cover a region; an edge-following module configured to cause the robot to follow unfollowed edges; a control module configured to invoke region covering on a first region defined at least in part based at least part of the initial pose, to invoke region covering on least one additional region, to invoke edge-following, and to invoke region covering cause the mapping module to mark followed edges as followed, and cause a third region covering on regions discovered during edge-following.

Abstract: A suction apparatus and a glass-wiping device with the suction apparatus. The glass-wiping device sucks onto the surface of a glass via the suction apparatus. The suction apparatus comprises a suction cup unit (1). The suction cup unit (1) comprises an inner suction cup (11) and an outer suction cup (12). The inner suction cup (11) is arranged on the inside of the outer suction cup (12), where a chamber on the inside of the inner suction cup (11) forms an inner negative pressure chamber (13) via vacuum suction, and where a chamber between the inner and outer suction cups (11 and 12) forms an outer negative pressure chamber (14) via vacuum suction. The glass-wiping device sucks onto the surface of the glass via the inner negative pressure chamber (13) and/or the outer negative pressure chamber (14).

Abstract: Disclosed is an electric power consumption control system for a factory where a plurality of machine tools (Mi, Mp1, Mp2) are installed. A machine tool (Mi) is provided with a control device (10) whereby either the rotational acceleration/deceleration (Pi) for the motor for the machine tool and/or the rotational speed (Si) thereof is controlled on the basis of information regarding electric power consumption (Wt) in the factory so that electric power consumption will not exceed a specified value (We). This electric power consumption control system is also provided with electric power detection instruments (11, 12, 13) and an electric power monitoring instrument (20) which measure the electric power consumption of all the machine tools installed in the factory, thereby obtaining the electric power consumption of the factory, and provide information regarding the electric power consumption to the control device of the machine tool equipped with the control device.

Abstract: In one embodiment, a system includes a controller configured to: determine a reference velocity at various intervals, receive or determine a secondary velocity based at least in part on a parameter associated with a drive mechanism motor, determine a value representative of a difference between the reference velocity and secondary velocity, adjust a speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and secondary velocity, receive/determine a primary velocity based on reading information encoded on a magnetic tape, at a switching point, make the reference velocity about equal to the primary velocity, after the switching point, determine the reference velocity at various intervals, after the switching point, determine a value representative of a difference between the reference velocity and primary velocity, and adjust the speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and primary velocity.

Abstract: A methodology and apparatus is described that registers images outputted by at least two video camera sensors that are not necessarily bore-sighted nor co-located together. Preferably this can be performed in real-time at least at video rate. The two video camera sensors can be either of similar or two different modalities (e.g., one can be intensified visible, while the other can be thermal infrared) each possibly with a different field-of-view. The methodology and apparatus take advantage of a combination of Inertial Measurement Units (IMUs) information and image registration between the two camera sensors from computational image processing. In one preferred embodiment, the system uses a rifle mounted weapon sight camera sensor and a helmet mounted sensor camera. The aim point of the weapon sight camera sensor (e.g., typically at the image center) zeroed to the true rifle aim point is digitally overlayed as a reticle on the video image from the helmet sensor, displayed on a head mounted display (HMD).

Abstract: A fan speed control circuit includes a first fan, a second fan, a first temperature sensor, a second temperature sensor, a PWM regulator, and a driving module. The first temperature sensor senses a temperature of the first component to generate a first temperature signal. The second temperature sensor senses a temperature of a second component to generate a second temperature signal. The PWM regulator is connected to the first temperature sensor and the second temperature sensor. The PWM regulator generates a first PWM signal according to the first temperature signal and generates a second PWM signal according to the second temperature signal. The driving module is connected to the PWM regulator. The driving module generates a first driving voltage provided to the first fan according to the first PWM signal. The driving module also generates a second driving voltage provided to the second fan according to the second PWM signal.

Abstract: An electric toothbrush is disclosed. The toothbrush includes a housing; a brush; an electric motor for driving the brush; a power supply for providing the electric power required for operation of the toothbrush; a switch mechanism for turning the drive on and off; and an electronic circuit for adjusting the effective voltage (UMot) applied to the electric motor. In operation, a voltage supplied by the power supply declines with the discharge status of the power supply from a high-voltage range to a low-voltage range. During operation of the toothbrush in the high-voltage range (H), the effective voltage (UMot) applied to the electric motor is lowered to a level at which the electric motor has reached a rotational speed corresponding essentially to the rotational speed of the electric motor in the medium-voltage range.

Abstract: A traction drive system comprising a plurality of electric motors selectably connected to a main shaft by engagement devices, each motor or combination of motors provides distinct performance characteristics along a broad spectrum of performance characteristics; and a method of managing a traction drive system including sensing physical parameters of the fraction drive system, selecting an electric motor having well-suited performance profile based on pre-selected criteria against which the sensed parameter is compared, and engaging one or more of the corresponding motors to the main shaft.

Abstract: A first motor generator-control unit (MG1-ECU) and a second motor generator-control unit (MG2-ECU) are provided independently for respective motor generators. The MG2-ECU performs electric power balance control by correcting an MG2 torque command value as required, so that the sum of the MG1 electric power and the MG2 electric power is within a range of allowable input/output electric power of a DC power supply. The electric power balance control is performed using an estimate of the MG1 electric power based on data obtained by the MG1-ECU. The estimate is determined so that a communication delay time between the MG1-ECU and the MG2-ECU is corrected. In this way, the electric power balance control can be performed appropriately for restricting, within a predetermined range, the total input/output electric power of the electric motors as a whole of a hybrid vehicle mounted with a plurality of motor generators (electric motors).

Abstract: An information handling system includes a processor, memory coupled to the processor, a cooling fan, and a controller coupled to the processor and configured to control the speed of the cooling fan based on the operation of the memory. The processor is configured to determine a user-selected performance setting for the information handling system; determine a fan speed limit corresponding to the user selected performance setting; limit the speed of the cooling fan based on the determined fan speed limit; and in connection with limiting the speed of the cooling fan, control an operational parameter of the memory to reduce cooling demands generated by the memory.

Abstract: Embodiments of the present invention include a composite electromechanical machine which can operate as a motor, a generator (including dynamo or alternator), or any combination thereof. In an aspect, the present composite electromechanical machine comprises at least a double-sided magnetic plane (e.g., rotor or stator) to form two rotor/stator pairs, together with a controller to configure the multiple rotor/stator pair. The controller can configure or convert the multiple rotor/stator pairs into motors, generators, or nonoperation, and also can change the windings characteristics of the magnetic planes. The controller can add new functionality and characteristics to the present composite electromechanical machine. Other embodiments can also be included.

Abstract: A power limiting system for multiple electric motors includes an electrical power generating component, such as an alternator, and a plurality of motor controllers connected to an electrical bus. Each motor controller compares the voltage on the bus to a specified minimum voltage and a specified maximum voltage, and reduces its electric power output if the voltage on the bus is less than the maximum voltage while continuing to operate the electric motors.

Abstract: A torque control device controlling torque of first and second mechanical units connected coaxially to each other through connecting members includes a controller generating first and second references from a command from a host system, first and second motors respectively driving the first and second mechanical units, first and second motor control units respectively controlling the first and second motors on the basis of the first and second references. The first and second references synchronously accelerate the first and second motors to first rotational speed, then increase rotational speed of the second motor according to a speed profile to produce torsional torque in the connecting members, decelerate the second motor to the first rotational speed after the torsional torque reaches a predetermined value, and synchronously decelerate and stop the first and second motors after a predetermined time period elapses.

Abstract: A variable frequency transformer including: a first parallel circuit including at least two of the rotary transformers arranged in parallel and having an isolating circuit breaker connected to a rotor winding of each of the rotary transformers, and a separate synchronizing circuit breaker connected to a stator winding in each of the rotary transformers in the first parallel circuit; a first main transformer having a first winding connectable to a first power grid and a secondary winding connectable to the isolating circuit breaker in the first parallel circuit; a second main transformer having a first winding connectable to a second power grid and a secondary winding connectable to each of the synchronizing circuit breakers in the first parallel circuit, and a control system operatively connected to each of the synchronizing circuit breakers, the isolating circuit breakers and the drive motors for each of the rotary transformers.

Abstract: A motor control processor is provided for motor phase current sampling of multiple variable frequency controlled electric motors, and includes an analog-to-digital (A/D) converter and a controller. The A/D converter has multiple analog inputs and generates a digital output signal in response to the multiple analog inputs. The controller is coupled to the A/D converter and determines a maximum desired switching frequency for a first one of the multiple variable frequency controlled electric motors. The controller further selects a base period in response to the maximum desired switching frequency and defines a phase shift time delay as a fraction of the base period so the controller may control the multiple analog inputs of the A/D converter to sample motor phase currents of each of the multiple variable frequency controlled electric motors at sample times determined by the controller in response to the base period and the phase shift time delay.

Abstract: The invention relates to a method for controlling a number of fans (2) of a heat exchanger that can be used in refrigeration, air conditioning, or process technology. The fans (2) form a number of fan groups (5), and each fan group (5) is connected to an electrical energy supply (7) selectively by means of a constant power supply (14) or by means of a variable power supply (15). The fan group (5) is operated at a constant fan speed with the constant power supply (14) and at a variable fan speed with the variable power supply (15). A power parameter (I) indicating an instantaneous total power demand of all fan groups (5) supplied by means of the variable power supply (15) is detected. At least one of the fan groups (5) that is currently being fed by means of the variable power supply (15) is switched to the constant power supply (14) if the power parameter (I) exceeds a limit value (Imax).

Abstract: An apparatus and method for servomotors of an electric injection molding machine includes a motion controlling unit, two driving amplifying units, and two servomotors respectively connected to the driving amplifying units. The motion controlling unit includes two servomotor position controllers both for receiving a first position command, and the driving amplifying units are respectively connected to the servomotor position controllers for receiving a second and third position command. Two position detectors are respectively received in the two screw caps that are mounted to the servomotors for detecting absolute positions of the corresponding screw caps. The screw caps are respectively connected to inputs of the first and second servomotor position controllers to form two screw cap position feedback circuits.

Abstract: A system comprising a fan tachometer module, a conversion module, and a pump tachometer module. The fan tachometer module is adapted to measure a speed of a cooling fan. The conversion module is in communication with the fan tachometer module, and is adapted to convert the speed of the cooling fan to a control voltage based on a predetermined ratio between the speed of the cooling fan and a speed of a cooling pump. The pump tachometer module is in communication with the conversion module, and is adapted to control the speed of the cooling pump based on the control voltage.

Abstract: Dynamic calibration of a secondary velocity signal is provided in a tape drive. In one example, a reel motor is operated to drive a reel carrying a tape in a tape drive. The motion of the tape is measured to provide a measured primary velocity signal of the tape, and in addition, the operation of the reel motor is measured to provide an estimated secondary velocity signal of the tape as a function of motor parameters and the motor operation measurements. The estimated secondary velocity signal of the tape may be calibrated as the tape is driven, as a function of the tape motion measurements and the motor operation measurements. Other embodiments are described and claimed.

Abstract: A power transmission device capable of adjusting a torque to be applied to an output shaft easily and removing a backlash between gears exactly, and a display device and a display panel pedestal that have the power transmission device. A power transmission device 101 includes a display panel 102, an output shaft 103 to which the display panel is connected, output gears 104 and 105 rotating integrally with the output shaft, transmission gears 106 and 107 engaged with the respective output gears, motors 108 and 109 providing driving forces to the respective transmission gears, and a control circuit 110 controlling the motors. The control circuit 110 causes the motors 108 and 109 to rotate the transmission gears 106 and 107 at different rotation numbers, and to transmit different driving forces to the respective output gears 104 and 105.

Abstract: A heat dissipation system used in an electronic device includes a plurality of fans positioned in the electronic device, a sensing module, and a processing module. The sensing module is configured for detecting temperature, relative humidity, and air pressure of airflow flowing in the electronic device. The processing module is configured for adjusting a voltage applied to each of the plurality of fans according to the detected temperature, relative humidity, and air pressure of the airflow.

Abstract: A complex signal processing system for multiple fans is used to control the rotation of a first fan and a second fan. The speed signals of the first fan and the second fan are processed through an XOR operation to obtain a complex speed signal. In response to the complex speed signal, the speed and the operational status of the first fan and the second fan can be evaluated.

Abstract: A torque control device controlling torque of first and second mechanical units connected coaxially to each other through connecting members includes a controller generating first and second references from a command from a host system, first and second motors respectively driving the first and second mechanical units, first and second motor control units respectively controlling the first and second motors on the basis of the first and second references. The first and second references synchronously accelerate the first and second motors to first rotational speed, then increase rotational speed of the second motor according to a speed profile to produce torsional torque in the connecting members, decelerate the second motor to the first rotational speed after the torsional torque reaches a predetermined value, and synchronously decelerate and stop the first and second motors after a predetermined time period elapses.

Abstract: There is provided a servo controller for synchronously controlling a master side drive source to drive one drive axis and a slave side drive source to drive the other drive axis. The servo controller includes a correction data calculation means for calculating correction data to correct a positional deviation of a slave side drive source according to a synchronization error which is a difference between a positional deviation of a master side drive source and a positional deviation of the slave side drive source, in which the correction data is added to the positional deviation of the slave side drive source.

Abstract: A master unit and a plurality of slave units are connected by way of a communication path. The master unit sends to the slave units timing signals generated by its own cycle signal generator by way of a communication path. The slave units determine the cycle difference and the phase difference between a timing signal generated by its own cycle signal generator and the timing signal sent from the master unit and, in accordance therewith, determine a cycle adjustment amount. The cycle signal generators of the slave units adjust the timing signal cycle based on the cycle adjustment amount.

Abstract: A transmission path delay is set in a shift setting register. A slave unit generates a PRE_ITP signal in response to a timing signal (ITP signal) issued by a master unit. The phase difference between this PRE_ITP signal and the ITP signal unique to the slave unit is loaded into a period modification counter. A timer corrects a reference value, outputs position/speed control period signals (SYN signals) and counts down the period modification counter with these SYN signals until the period modification counter reaches zero. Furthermore, the ITP signal unique to the slave unit is outputted every time a predetermined number of the SYN signals are outputted.

Abstract: A method and assembly for synchronizing machine operations, the assembly comprising a reference generator for generating a speed reference signal and a position reference signal, a plurality of slave units, each slave unit including, a mechanical device, a separate motor linked to and driving the mechanical device and a separate unit controller for controlling the unit motor, the unit controller receiving and using the reference signals to control motor operation and a synchronizer receiving the reference signals from the control signal source and simultaneously providing the reference signals to each of the slave unit controllers for use in controlling operation of the motors in a synchronized fashion.

Abstract: A system and method in accordance with the present technique for protecting motor drives from damage due to misconfiguration while coupled to a common DC bus, comprises sensing electrical operating parameters of the motor drives, automatically determining whether each of the drives is actually installed as a common bus leader or a common bus follower, and comparing the actual installation of the motor drives to a respective stored configuration of each of the motor drives as either a common bus leader or a common bus follower.

Abstract: A capstan drive includes a first capstan that moves a device on a carriage and a second capstan that receives a second rotary motion to move the carriage. A first power transmission has a driven shaft coupled to the first capstan, a first drive shaft coaxial with the driven shaft to receive a first rotary motion for driving the device, and a second drive shaft coaxial with the driven shaft. A second power transmission couples the second rotary motion to the second drive shaft. The second power transmission has a drive ratio such that if there is no first rotary motion, a first cable is drawn in by the first capstan at the same rate as a second cable is drawn in by the second capstan in response to the second rotary motion.

Abstract: A capstan drive includes a first capstan that moves a device on a carriage and a second capstan that receives a second rotary motion to move the carriage. A first power transmission has a driven shaft coupled to the first capstan, a first drive shaft coaxial with the driven shaft to receive a first rotary motion for driving the device, and a second drive shaft coaxial with the driven shaft. A second power transmission couples the second rotary motion to the second drive shaft. The second power transmission has a drive ratio such that if there is no first rotary motion, a first cable is drawn in by the first capstan at a same rate as a second cable is drawn in by the second capstan in response to the second rotary motion.

Abstract: Fan module and control device thereof. The fan module comprises a plurality of fans and the control device. The control device comprises a temperature sensing circuit, and a driving circuit. The temperature sensing circuit detects an ambient temperature of the fans and generates a sensing signal accordingly. The driving circuit is coupled between the fans and temperature sensing circuit, and comprises a fully powered operating mode and a power-saving operating mode, wherein the driving circuit selects different operating modes in accordance with the sensing signal, and generates a fan driving signal controlling the speed of the fans.

Abstract: An electronic control system (24) for a vehicle seat is provided that includes a seat base (12), a seat back (14), an operator input device (30) and a control circuit (26). The seat base has a seat back motor (34) configured to move a seat base forward and backward. The seat back has a seat back motor (32) configured to adjust an angle of inclination of the seat back. The operator input (30) device is configured to received operator commands for movement of the vehicle seat. The control circuit is configured to receive the operator commands and to control the seat base motor and the seat back motor. The control circuit is also configured to move the seat base and the seat back at a ratio of approximately 1 degree of inclination to between approximately 1 mm to approximately 4 mm of forward or backward movement of the seat base.

Abstract: A workpiece is rotated by a master motor and a tool is linearly moved by a slave motor to cut a thread in the workpiece. Position feedback of the master motor is multiplied by a coefficient K and the result used as the position command of the slave motor. Provision is made of an angle synchronization learning control unit for storing one pattern cycle's worth of the correction data of the threading and adding the same to the position deviation. This control unit stores one pattern cycle's worth of the correction data corresponding to the position feedback of the master motor. The position is converted to the correction data corresponding to the time at that time based on the stored correction data to find the correction data and this is added to the position deviation.

Abstract: A motor driving control device includes a motor, a switch unit that controls driving of the motor, a current detection resistor that outputs a detection voltage indicating a current of the motor, a comparator that compares the detection voltage with a target current value, an on signal generating unit that generates an on signal, a polarity of which is changed for each interval of predetermined time, and a control unit that has the comparator, a holding circuit receiving the on signal to change a circuit state. When a change in polarity of the on signal is detected, the holding circuit holds the circuit state such that the switch unit is turned on and a current is supplied to the motor. When the comparator detects that the current of the motor is increased to the target current value, the holding circuit holds the circuit state such that the switch unit is turned off.

Abstract: The invention provides an article transport vehicle that includes: a vehicle body; a first wheel that supports the vehicle body; a second wheel that is disposed spaced apart from the first wheel in a fore-and-aft direction, and that supports the vehicle body; a first drive motor capable of driving the first wheel; a second drive motor capable of driving the first wheel; velocity sensor for obtaining information necessary for obtaining a velocity of the vehicle body; and controller for controlling the first and the second drive motors, wherein the controller performs a first travel velocity control with respect to the first drive motor so as to control the first drive motor based on a difference between a target travel velocity and a travel velocity based on a detection by the velocity sensor, and performs a first conflict suppress control with respect to the second drive motor so as to control the second drive motor to reduce conflict with driving of the first wheel by the first travel velocity control.

Abstract: A synchronous control device which is provided with drive motors and a central control unit generating a synchronous reference signal and with which the drive motor is controlled to rotate synchronously with the synchronous reference signal supplied from the central control unit, which is provided with: device motor brakes for braking a rotation of the drive motor; machine home position detectors for detecting a rotation phase of the drive motor; and drive controlling means for controlling a drive motor in such a manner that the drive braking means is activated depending on a stop instruction supplied from the central control unit and a required rotation phase of the drive motor is stored; a comparison between the required rotation phase of the drive motor and the rotation phase thereof is performed at the time of re-start; and a home position alignment of the drive motor is performed at a start time of a subsequent operation.

Abstract: A method for determining motor velocity includes generating an edge signal including a plurality of edges. The edge signal indicates rotational travel of a motor. Edge counts in the edge signal occurring during periodic sample intervals are determined. The edge counts are filtered over a predetermined number of samples. A velocity feedback signal is generated for the motor based on the filtered edge counts. A drive unit for controlling a motor includes an edge detection unit, a position accumulator, and a velocity filter. The edge detection unit is operable to receive a motor position signal and generate an edge signal including a plurality of edges. The edge signal indicates rotational travel of the motor. A position accumulator is operable to determine edge counts in the edge signal occurring during periodic sample intervals. The velocity filter is operable to filter the edge counts over a predetermined number of samples to generate a velocity feedback signal for the motor based on the filtered edge counts.

Abstract: An electronic control system (24) for a vehicle seat is provided that includes a seat base (12), a seat back (14), an operator input device (30) and a control circuit (26). The seat base has a seat back motor (34) configured to move a seat base forward and backward. The seat back has a seat back motor (32) configured to adjust an angle of inclination of the seat back. The operator input (30) device is configured to received operator commands for movement of the vehicle seat. The control circuit is configured to receive the operator commands and to control the seat base motor and the seat back motor. The control circuit is also configured to move the seat base and the seat back at a ratio of approximately 1 degree of inclination to between approximately 1 mm to approximately 4 mm of forward or backward movement of the seat base.

Abstract: A surface clinging robotic device. The device includes a supporting structure or base, on which is mounted (a) a lead pivoting support surface, such as a pivoting wheel, and (b) two or more traction drives, such as drive wheels. Each of the traction drives are independently driven by a separate drive motor. A plurality of vacuum cups are mounted on the bottom of the base. The vacuum cups each have a low friction foot designed for movement over a surface with minimal friction while vacuum is maintained. The low friction foot portion is provided by a generally surface direction oriented C-shaped Teflon skin. The robotic device can move over gaps or obstructions in the surface without losing vacuum in all of the vacuum cups, using a fluid limiting valve at each vacuum cup to interrupt flow in the event of loss of vacuum in that vacuum cup.

Abstract: A motor control system for controlling a motor includes control logic and a motor controller. The control logic is operable to generate a control signal at a first periodic time responsive to a synchronization signal. The motor controller is operable to generate a drive signal for the motor based on the reference signal at a second periodic time synchronized with respect to the first periodic time.

Abstract: The invention provides an electrically movable vehicle drivable by a simplified mode of control and a control program for driving the vehicle. A normalized value Y? representing translation motion and a normalized value X? representing turning motion are fed from a command value input unit 110 to a velocity command value calculating unit 120. The calculating unit 120 determines a translation velocity command value Vg—trg based on the normalized value Y?. The calculating unit 120 determines a turn angular velocity command value ?f—trg that will always satisfy Expression (2–4) for preventing the vehicle from falling down. The translation velocity command value Vg—trg and the turn angular velocity command value ?f—trg determined by the unit 120 are fed to a control command value calculating unit 130, which calculates control command values for left and right drive wheels. The control command values are fed to a motor control unit 140 to control motors Mr, Ml and control the drive wheels.

Abstract: An apparatus for use with a signal generator and a motor controller includes a velocity compensator, an adjustor, and a velocity regulator. The signal generator provides a reference velocity signal, and the motor controller receives an output signal and uses the output signal to control a torque input signal applied to the motor. The velocity compensator is operable to receive the reference velocity signal, determine a derivative of the reference velocity signal, and generate a velocity compensation signal based on the derivative. The adjustor is operable to adjust the reference velocity signal as a function of the velocity compensation signal. The velocity regulator is operable to compare the adjusted reference velocity signal to a feedback velocity signal and generate the output signal received by the motor controller for adjusting the torque input signal based on the comparison.

Abstract: A method for controlling a motorized barrier operator after detecting an obstruction includes the steps of providing a motorized barrier operator that moves a barrier between limit positions and providing at least one control switch that upon actuation moves the barrier in a direction toward one of the limit positions. Actuation of the at least one control switch during movement of the barriers at least causes the barrier to stop. If an obstruction is detected by the motorized barrier operator during movement of the barrier, the operator allows only uni-directional movement of the barrier, regardless of actuation of the at least one control switch, after the detecting step.

Abstract: A serial interface circuit electrically connected to a controller to control an electric motor. The interface circuit includes a controller circuit and a motor circuit. The controller circuit includes a transmitter and a receiver circuit, and the motor circuit includes a transmitter circuit and a receiver circuit. The interface interrogates the motor to acquire status and diagnostic information by receiving commands from the controller, adjusts a voltage level to a desired level, outputs the voltage signal to command and control the motor, and receives a voltage response from the motor.

Abstract: When an angular acceleration ? of a rotating shaft of a motor connected with a drive shaft exceeds a preset threshold value ?slip, which suggests the occurrence of a skid, the torque control procedure sets a maximum torque Tmax by referring to a map, which gives a smaller maximum torque Tmax with an increase in angular acceleration ?, and restricts the motor torque to the maximum torque Tmax. The maximum torque Tmax is fixed to a value corresponding to a peak value of the angular acceleration ? at the time of occurrence of a skid. The torque control procedure then integrates the angular acceleration ? to give a time integration thereof over an integration interval when the angular acceleration ? once exceeds the preset threshold value ?slip and decreases again below the preset threshold value ?slip by the motor torque restriction.

Abstract: By controlling all motors so that they all decelerate at substantially the same rate, buckling of media in a media handling system is substantially eliminated on shutdown. Preferably, the deceleration rate of the highest inertia motor is used as the common deceleration rate.

Abstract: In a wiper system for vehicles, in particular for automobile windshields, including a first wiper arm, a primary drive motor (12) associated with the wiper arm for generating a defined wiping motion of the first wiper arm, at least one second wiper arm, and a secondary drive motor (13) associated with the second wiper arm for generating a defined wiping motion of the second wiper arm, the secondary drive motor (13) being controlled as a function of the position of the primary drive motor (12), a motor position code element (23) is provided, which is coupled to the primary drive motor (12) and is provided with control codes (24) that are directly representative of the associated position of the secondary drive motor (13). For scanning the control codes (24) of the motor position code element (23), a scanner unit (25) is used, which via a signal connection (22) is connected to a controller (27) of the secondary drive motor (13).

Abstract: 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 switching devices to sequentially provide pulses to each motor.

Abstract: In a wiper system for vehicles, in particular for automobile windshields, including a first wiper arm, a primary drive motor (12) associated with the wiper arm for generating a defined wiping motion of the first wiper arm, at least one second wiper arm, and a secondary drive motor (13) associated with the second wiper arm for generating a defined wiping motion of the second wiper arm, the secondary drive motor (13) being controlled as a function of the position of the primary drive motor (12), a motor position code element (23) is provided, which is coupled to the primary drive motor (12) and is provided with control codes (24) that are directly representative of the associated position of the secondary drive motor (13). For scanning the control codes (24) of the motor position code element (23), a scanner unit (25) is used, which via a signal connection (22) is connected to a controller (27) of the secondary drive motor (13).