Abstract: A brake system comprises a cylinder-piston unit movable by an electromechanical actuator. Wheel brakes associated with at least one axle can be supplied with braking pressure via the hydraulic pressure chamber. The electromechanical actuator comprises a rotation-translation transmission and an electronically commutated synchronous machine having a stator with at least two phase windings, a rotor comprising at least one permanent magnet and at least one rotor position sensor. A torque-forming current and/or a magnetic field attenuating current are adjusted in a co-ordinate system which is fixed relative to the rotor. Voltages in the co-ordinate system are detected to serve as control variables and are transformed into a voltage phasor, which indicates for each phase winding of the stator, a voltage to be applied, and a set value for the magnetic field attenuating current is limited to a maximum value being determined from a predetermined characteristic map.

Abstract: Disclosed is a DC/DC converter system that, after calculating required voltages of the first and second motors based on the magnetic flux and speeds of the first and second motors, the voltage supplied to inverters is controlled by a final voltage command determined as a larger value of the battery voltage and the final required voltage. In particular, the final required voltage is determined as a larger value of the required voltages of the first and second motors.

Abstract: A motor control apparatus for synchronously controlling a master axis motor for driving a master axis and a slave axis motor for driving a slave axis, includes: a master axis position detector which outputs position data of the master axis and a reference signal with a predetermined fixed period; a master axis receiving circuit which receives the position data and the reference signal output from the master axis position detector; a master axis computation circuit which computes a master axis error representing a difference between the position data received by the master axis receiving circuit and the position data acquired at the time of the reception of the reference signal; and a slave axis motor control unit which controls the operation of the slave axis motor by using the master axis error as a command for synchronizing the operation of the master axis motor.

Abstract: A synchronous fan system is provided which intermittently calibrates the fans by rotating periodically the fans each to a common stop position.

Abstract: The present invention is a method and system for monitoring the continuous flow of power delivered by multiple DC Direct current operated starter motors used to start engine driven electrical generators. The method and system comprise the closing of a starter battery system and an associated starter control switch, causing the starter battery system to discharge through a shunt whereby current is fed into a starter motor. The shunt is optionally provided as a precision resistor with a pre-calibrated voltage drop in millivolts DC proportional to a current passing through it. The shunt directs current to a meter relay, which is calibrated by establishing two set points, or desired trigger ranges, for the meter relay. If the current falls outside a range established by the two set points, then a meter relay alarm output is activated; and, if the current remains within the range, then the meter relay alarm output is not activated.

Abstract: A motor driving apparatus includes a motor driving unit, a low-voltage source, a current detecting element, and an insulation resistance degradation determinator. The motor driving unit includes an inverter coupled between a positive DC bus line and a negative DC bus line of a DC power source. The inverter converts DC power into AC power to drive an AC motor. The low-voltage source is coupled between a ground and at least one of the positive DC bus line and the negative DC bus line. The current detecting element detects a closed circuit current flowing through a closed circuit of the low-voltage source, the AC motor, and a part of the inverter. The insulation resistance degradation determinator makes a comparison between the closed circuit current and a predetermined threshold, and configured to determine, based on the comparison, whether an insulation resistance of the AC motor is degraded.

Abstract: Controller assemblies and packaging for electronic control systems of electric motors utilized in utility vehicles or other power equipment are disclosed. The controller assemblies are packaged for robust design and heat dissipation, while collectively housing the controllers, switches and sensors needed to operate multiple motors performing different functions, or the same function in serial.

Abstract: An apparatus, system, and method are disclosed for an efficient hub motor. A stator is attached to a shaft. Coils are embedded in the stator in a circular pattern. Two rotors are rotatably coupled to the shaft with the stator between them. Permanent magnets are embedded in each rotor. Each permanent magnet and each core has a similar cross-sectional shape. The permanent magnets are positioned in a circular pattern corresponding to the coils. The permanent magnets are positioned so that when a coil aligns with a permanent magnet a next coil aligns between two magnets. Shorting bars connect exterior edges of the permanent magnets. A sequence control connects each coil so that current flows in a coil in one direction and the sequence control disconnects the coil and reconnects the coil with current flowing in the opposite direction in response to a set of permanent magnets aligning with a coil.

Abstract: A fan device with improved speed control module includes a stator, a rotor, and a speed control module. The stator has a driving unit outputting currents for the stator to generate alternative magnetic fields and thus turn the rotor. The speed control module includes a control unit and a speed adjusting circuit, with the control unit generating a control command for the driving unit and further outputting a state signal for the speed adjusting circuit to control whether a PWM signal enters the control circuit or not.

Abstract: At least two asynchronous AC induction electrical machines in parallel connection with the power source respectively include a main winding and control winding for operating the electrical machines, wherein the individually load driving operations of the two electrical machines in cross-interlocked parallel connection with the power source respond to changes in individual electrical machine loading statuses to provide variable impedance operation so as to change the end voltage ratio between the individual electrical machines.

Abstract: A twin motor actuator includes a pair of motor controllers for controlling respective motors according to commands received by each motor controller, and a communication link for communicating the commands received by each motor controller to the other motor controller. The motor controllers are configured to transmit the commands received by the motor controller to the other motor controller via the communication link, determine whether contradictory commands have been received by the motor controllers, and control the motors at a defined state if contradictory commands are received. The communication link is an electrically isolated communication link and the defined state may be the state of the motors immediately before detecting the contradictory commands.

Abstract: A synchronous fan system is provided which intermittently calibrates the fans by rotating periodically the fans each to a common stop position.

Abstract: A switch section includes a common terminal connected to a terminal at one end of each of a pair of motors, a first terminal connected to a terminal at the other end of one of the motors and a second terminal connected to a terminal at the other end of the other of the motors, and three-contact switches each including one common contact and two switching contacts. In the switch section two switches corresponding to one direction selected from the up and down directions form a switch group, at least one switch corresponding to the other direction selected from the up and down directions is provided, two switches corresponding to one direction selected from the left and right directions form a switch group, and at least one switch corresponding to the other direction selected from the left and right directions is provided.

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: An automatic traction control system is provided for an electric or hybrid-electric vehicle. The automatic traction control system may be used with vehicles using two separately excited motors where the armatures of the motors are connected in series to provide differential control. The automatic traction control system monitors and compares the voltages across the armatures of the two motors. If the voltage differential exceeds a predetermined threshold, it is determined that one of the wheels is spinning and current is diverted from the motor driving the spinning wheel to the motor driving the non-spinning wheel.

Abstract: The present invention provides a motor drive system that is substantially more robust than those of the prior art. Generally, the motor drive system provides a redundant communication topology with the drives, thereby greatly reducing the chance of failure by a fault in the drive-to-drive communication link. Specifically, the motor drive system includes a plurality of motor drives joined by a communication media. Each motor drive has a motor control circuit configured to control the speed of an electric motor and a media access control unit having two communication modules. Each communications module includes a transmitter and a receiver joined to the communications media. A set of routing switches in the media access control unit joins the communication modules to connect the motor drives in an independent primary and a secondary ring communicating data for controlling the motor drives.

Abstract: A mobile machine may include one or more generator units, a plurality of electric propulsion motors, and a power-transfer system operable to transfer electricity from one or more of the generator units to one or more of the electric propulsion motors. The mobile machine may also include power-system controls that control the connection of the one or more electric propulsion motors to the power-transfer system. The power-system controls may selectively use a first motor-connection strategy for controlling when one or more groups of the electric propulsion motors are connected to the power-transfer system in series, and the power-system controls may selectively use a second motor-connection strategy for controlling when one or more groups of the electric propulsion motors are connected to the power-transfer system in series.

Abstract: A system controller is provided that includes a communication network for transmitting and receiving information from an installed blower motor controller, and a removable memory device connected to the system controller. The removable memory device includes stored system parameter information related to a particular heating or cooling system, which information includes at least motor related parameters related to one or more types of blower motors. The system controller further includes a processor that receives, via the communication network, identifying information from the blower motor controller that identifies the type of blower motor that is installed. The processor is configured to retrieve motor related parameters corresponding to the specific identified blower motor from the memory device, and to send the corresponding motor related parameters to the blower motor controller.

Abstract: The invention relates to a vehicle seat, in particular for a motor vehicle, and equipped with a central control unit, motors, peripheral motor control devices each associated to one motor and connected to the central control unit. To allow rapid and accurate adjustments while providing versatility, the invention provides that each motor and its associated motor control device shall constitute a closed regulation loop.

Abstract: A propulsion system for a vehicle is provided. The propulsion system includes a first traction drive system and a second traction drive system. The first traction drive system includes a heat engine and a first drive motor. The heat engine supplies energy to the first drive motor to propel the vehicle. The second traction drive system includes a second drive motor and a first energy storage device. The second drive motor both supplies energy to the first energy storage device and receives energy from the first energy storage device. Also provided is a propulsion system for a vehicle that includes the first traction drive system and a propulsion means for supplying energy to a first energy storage device and for receiving energy from the first energy storage device.

Abstract: An electric drive system comprising several electric drives, each of which comprises an electric motor, and a control system which is arranged to control said several electric drives and comprises a first outer controller and a first speed controller. A signal supplied to the input of the first speed controller is generated by using the output signal of said first outer controller, and the first speed controller is arranged to generate an output torque signal at its output. The control system further comprises a torque controller per each electric drive, which torque controller is arranged to control the torque of the corresponding electric motor. A signal supplied to the input of each torque controller is generated by using the output torque signal of the first speed controller.

Abstract: The invention relates to a control circuit for an arrangement having at least two DC motors (10, 12), which can be connected in parallel to a DC voltage system (16, 18), in particular a circuit for controlling at least two motors of a motor vehicle fan. In this case, the DC motors (10, 12) can be connected to the DC voltage system (16, 18), on the one hand, during starting, jointly via in each case one series resistor (22, 24) having a low resistance value and a common semiconductor switching element (26) and, on the other hand, during operation, via separate semiconductor switching elements (32, 34), the series circuit comprising the separate series resistors (22, 24) and the common semiconductor switching element (26) being arranged in parallel with the separate semiconductor switching elements (30, 32) for controlling the motors during operation.

Abstract: For mutually cross-interlocked multiple asynchronous AC induction electrical machines of the present invention, wherein the applicable operating characteristic curves of the asynchronous AC induction electrical machines include the asynchronous AC induction electrical machine of various operating characteristics, wherein when they are provided for the individual operation in different loading conditions, it is characterized that the cross interlocked electrical machine can be used to increase or decrease the rotational speed of the individual operation.

Abstract: A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry. The system and method provide for improved motor current waveform sensing that is able to effectively reject false brake pulses, avoid erroneous processing due to fluctuating battery voltage levels, and reduce the sensitivity to variations in motor current signals due to dynamic motor load, manufacturing variation, system aging, temperature, brush bounce, EMI, and other factors. The system and method also include an improved ability to multiplex additional external motor drivers to the motor control circuitry, select between sequential and simultaneous drive modes using an SPI bit, and monitor the system controller for an error condition and simultaneously driver motors in response to the error condition.

Abstract: A motor control device includes a velocity detection unit, a motor control unit, a phase difference detection unit, and a correction value calculation unit. The velocity detection unit detects each velocity of a plurality of driven bodies or of a plurality of motors which independently drives a corresponding one of the driven bodies. The motor control unit independently controls each of the motors based on the velocity and a predetermined velocity directive value. The phase difference detection unit detects a phase difference among each of the driven bodies. The correction value calculation unit calculates a correction value for the velocity or the velocity directive value based on the phase difference.

Abstract: An electric drive fuel control system and method for controlling a total drive torque supplied to a fuel metering pump includes a first main drive motor, a second main drive motor, and a backup drive motor, all coupled to the fuel metering pump. The operability of a main motor control to control electric current supply to the first main drive motor or the second main drive motor is determined. If the main motor control is operable, the total drive torque to the fuel pump is supplied from the backup motor and either the first main drive motor or the second main drive motor. If the main motor control is inoperable, the total drive torque to the fuel pump is supplied from only the backup drive motor.

Abstract: An AC power driving apparatus includes at least a DC input end, a DC motor, a plurality of AC output coils, a plurality of AC motors, a power chargeback device and a plurality of wires. The DC input end is connected to one side of the DC motor through the wires to supply driving power to the DC motor. The DC motor has another side connecting to one AC output coil through the wires to output AC power to one AC motor connected to another side of the AC output coil. The AC motor drives another AC output coil connected to one side thereof to generate amplification to be output. Thereby the another AC output coil is able to supply power to another AC motor to provide driving power.

Abstract: A method and a device for synchronously controlling multiple printing presses or multiple units in a printing press can reduce power consumption and improve durability of motors and motor bearings. A synchronous control device for multiple printing presses includes machine shafts of a main printing press and a sub printing press respectively provided with drive motors and is configured to synchronously control rotation of the sub printing press with respect to rotation of the main printing press. Here, drive motor brakes are attached to the respective drive motors, and drive control devices respectively configured to release synchronous control of the drive motor of the sub printing press by a stop instruction and to start the drive motor brakes of both of the printing presses are provided.

Abstract: A power unit which makes it possible to reduce power transmitted from a prime mover to a driven part via an electrical path, to thereby increase the efficiency of driving the driven part. A first rotating machine of the power unit inputs and outputs energy between a stator and first and second rotors thereof, via magnetic circuits formed by generation of a rotating magnetic field, and the rotating magnetic field, and the rotors rotate while maintaining a linear relation in which respective differences in rotational speed between the rotating magnetic field and the second rotor, and between the second and first rotors are equal. The rotors are mechanically connected to a prime mover and a transmission, respectively. A second rotating machine of the power unit is mechanically connected to a drive part without via the transmission, and electrically connected to the stator.

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 technique is provided for controlling operation of motors of different sized or ratings. Components used to apply and interrupt current to the motors may be shared in control devices for the different motors. The components may include contactors or circuit interrupters, and instantaneous trip devices. The components may be sized for the higher rated motors, and be oversized for the lower rated motors. Control circuitry permits the devices to be controlled in accordance with the characteristics of the particular motor to which the devices are applied, providing accurate circuit interruption while reducing the number of different components and component packages in a product family for the various motors.

Abstract: A circuit for the control of a stepper motor having a rotor configured as a permanent magnet and a stator configured of at least first and second energized excitation coils enclosing the rotor. Each end terminal of the first excitation coil is connected to the positive pole of the supply voltage over a switching element and each end terminal of a second excitation coil is connected to the negative pole of the supply voltage over a switching element. The central contacts of both excitation coils are connected to each other.

Abstract: A fan control system. The system includes a plurality of fans, each having a control device. One of the fans is designated as a master fan and others are served as slave fans according to a specific designation method, wherein the control device of the master fan actively monitors and controls the operating state of the slave fans according to the control device of the slave fans to amend the operating state of all fans.

Abstract: A multi-fan apparatus and method incorporates mutual active cancellation of fan noise and/or vibrations. The multi-fan apparatus includes two or more fans circuits, each comprising a fan, a fan speed controller and a separate tachometer, and a fan phase controller. The phase controller is connected to at least one fan speed controller and to each tachometer. Each fan's speed is independently and dynamically maintained at the same set speed by the fan speed controllers using an independent control loops. A noise and/or vibration cancellation phase difference between fans is determined in order to achieve destructive interference of pressure waves and, thus, noise and/or vibration reduction, in pre-determined region of a system incorporating the multi-fan apparatus. The phase controller establishes and maintains this cancellation phase difference between the fans based upon feedback from the tachometers.

Abstract: A radiator blower, in particular for motor vehicles, is indicated that comprises a plurality of individual fans (11, 12), each having an electrical drive motor (13, 14), and a plurality of switches (S1, S2, S3), each capable of being switched over into two positions, by means of which the drive motors (13, 14) are capable of being turned on and back off individually or in a series or parallel connection. To prevent disturbing noises from developing when the individual fan (11, 12) comes to rest after being turned off, when the operating drive motor or motors (13, 14) is/are turned off, an electronic control unit (20) forces the switches (S1, S2, S3)—at least temporarily—over into switch positions that bring about a short-circuiting of the turned-off drive motor or motors (FIG. 1).

Abstract: A drive unit for controlling a motor includes a position feedback device and a velocity noise filter. The position feedback device is operable to generate a position signal relating to a position of the motor. The velocity noise filter is coupled to the position feedback device and operable to filter the position signal over a predetermined number of samples to generate a velocity feedback signal for the motor.

Abstract: A drive unit for controlling drives of machine tools or production machines includes a signal electronics unit, a startup/diagnostic unit, and an interface between the signal electronics unit and the startup/diagnostic unit. The interface has a data line for data exchange between the signal electronics unit and the startup/diagnostic unit, and an electric power line independent of the data line. A switch can be provided that disconnects the signal electronics unit from a power mains or from an additional power supply, when a power failure is detected, and connects the signal electronics unit to the startup/diagnostic unit via the electric power line. This provides a simple and cost-effective approach for supplying electric power to the signal electronics in the event of a power failure or malfunction of the main power feed to the drive unit.

Abstract: A master controller installed in a master controller box and slave controllers installed in car doors to open and close window glasses of a car are connected by a single wire to each of slave controllers for enabling to send control signals through such a single wire so that the master controller applies DOWN current signal, UP current signal and no flow of current to slave controllers.

Abstract: A fan control system. The system includes a plurality of fans, each having a control device. One of the fans is designated as a master fan and others are served as slave fans according to a specific designation method, wherein the control device of the master fan actively monitors and controls the operating state of the slave fans according to the control device of the slave fans to amend the operating state of all fans.

Abstract: A drive system powering a group of machines each fitted with a rectifying unit, wherein the inputs of the control devices of the machines' drive motors are interconnected by an electrical bus which implements a power exchange. The system enables swapping current from a power supply between motors of different machines.

Abstract: A method for controlling the rotation speed of a slave drive is described, where a reference rotation speed and a reference position is provided to a controller. The controller determines an estimated acceleration curve for the slave drive based on an instantaneous rotation speed, an instantaneous position and a maximum rotation-speed-dependent acceleration of the slave drive. The estimated acceleration curve for the slave drive is hereby determined so that after a compensation time, the rotation speed of the slave drive is equal to the reference rotation speed and the position of the slave drive is also equal to an expected reference position, which is determined by the controller based on the reference position, the reference rotation speed and the compensation time.

Abstract: In a motor drive device having a plurality of driver units for driving motors and a command generator for giving a command to the driver units which are connected in serial communication, there is a communication section for setting up the communication formats corresponding to each of the driver units having different communication formats including data transmission speed from one another. Communication among the plurality of driver units with the respective communication formats and the command generator is carried out on a single serial bus.

Abstract: A concatenated motor assembly for providing rotational power that includes a continuous rotatable shaft cooperating with a first motor module assembly. The first motor module assembly communicates with a motor coupling unit, which in turn communicates with a second motor module. The second motor module and the motor coupling unit each cooperate with the rotatable shaft. The first and second motor modules are wound rotor electric motor. The first motor module assembly generates and provides an induced current to the motor coupling unit, which in turn provides power input to the second motor module assembly.

Abstract: A load-driving circuit capable of driving a plurality of loads based on a priority order endowed therewith is provided. The load-driving circuit comprises a first load 3, a first driving switch 1 for driving the first load, a second load 4, a second driving switch 2 for driving the second load, first switching means 5 being turned on when the first driving switch is switched to a position where the first load is driven, second switching means 6 being turned on when the second driving switch is switched to a position where the second load is driven, and third switching means 7 for disconnecting the first load from the grounding terminal when the first switching means 5 and the second switching means 6 are turned on at the same time.

Abstract: In order to improve a control device for operating a load circuit having at least one electric motor, this control device comprising a control stage which generates a pulse width modulated control signal, a power stage supplying the load circuit and having an electronic switch activated by the pulse width modulated control signal, a freewheeling element connected in parallel to the load circuit and a blocking monitoring means which generates a measurement switch-off interval by suppressing at least one switch-on interval of the pulse width modulated control signal, monitors the voltage in the load circuit during the measurement switch-off interval, compares it to a limit value and generates a blocking state signal in accordance with the comparison, in such a manner that a differentiated analysis of the voltages occurring in the measurement switch-off interval is possible it is suggested that for monitoring at least two electric motors connected in parallel in the load circuit the blocking monitoring means car

Abstract: A device for supplying energy by means of a first DC voltage source e.g. in the form of a DC voltage bus, a drive system comprising several electric motors is connected to said DC voltage bus. The electric motors are comprised e.g. in a number of yarn feeding devices co-acting with a weft insertion system in a shuttleless weaving machine for producing a woven fabric having a multi-colour pattern. The electric motors operate with energy consumption function phases (start and acceleration) and with energy generating function phases (deceleration or braking). The first DC voltage source is associated with at least one second DC voltage source via a variable voltage converter.

Abstract: A motor controlling serial communication device includes an upper controller having a first IC and a first connector, and motor drivers having second ICs, second connectors and third connectors. First cables and second cables are used for coupling the upper controller to the motor drivers, so that a daisy-chain connection is formed.

Abstract: There is provided a serial transmitting section for serially transmitting a command frame 100 which is sent from a host controller 1 to a positioning type servo amplifier 30 and a command follow-up type servo amplifier 50. In the command frame 100, an information section, into which information to be transmitted is inputted, has discrimination data for showing a selection between the positioning type servo amplifier 30 and the command follow-up type servo amplifier 50. In the positioning type servo amplifier 30 and the command follow-up type servo amplifier 50, there is provided information reading section for reading the content of an information section after the discrimination data of the command frame 100 by the discrimination data of the command frame 100.

Abstract: A ventilation assembly for a motor vehicle comprising first and second motor fan units (1, 2) and a control device (5) adapted to vary the ventilation power (P1+2) developed by the assembly formed by the two motor fan units according to a desired total power value (PTC). The control device (5) comprises an electric power variator (7) with continuous power variation, connected to the first motor fan unit (1), and a means for cutting-off the supply of the second motor fan unit (2), the power (P2) developed by the said second motor fan unit (2) being either zero or equal to its maximum operating power (PM2).

Abstract: The present invention relates to a flexible and compact motor control module based on the Controller Area Network (CAN) communication network. More specifically, the present invention relates to a motor control module which is based on the ISO11898 standard Controller Area Network (CAN), recognized for its suitability in the communication of intelligent sensors and actuators, and also capable of obtaining the location, speed and torque control commands of a motor and executing digital control functions irrespective of motor's type and power consumption, transmitting feedback data.