Abstract: The power switches of an inverter are mechanically integrated with an electric motor of a vehicle and are mounted on the end plate of the motor and employ short connections between the motor a-c terminals and the inverter a-c output terminals. Bond wireless modules are employed. The electronic controls for the inverter are mounted on a main control board which is positioned remotely from the inverter and is not subject to the heat and EMI produced by the inverter.

Abstract: A motor is configured to operate in one of at least two modes in response to determining that a power provided by a power supply for the motor crosses certain thresholds. For example, first and second windings apply a rotating force to a rotating armature of a single motor. The first and second windings are electrically coupled to first and second commutators, respectively, which transmit power to the first and second windings from a first and second power source, respectively. In other aspects, different power sources power the motor, and the motor operates at different speeds depending on the power source applied. For example, the change in power sources is effected in response to detecting a change in applied power past a threshold, thus effecting the motor's operation in a second, different speed. So configured, a single motor can reduce deployment of bulky and expensive add-on equipment.

Abstract: An electrical machine has been developed that opportunistically regulates the voltage supplied to the coil of the electrical machine. The electrical machine includes a stator winding, a rotatable electromagnet, and a voltage regulator. The voltage regulator is configured to control an output voltage of the electrical machine. The regulator is configured to vary the magnitude of the output voltage based at least in part on acceleration of the vehicle.

Abstract: A controlling circuit for outputting a square wave circuit to control a fan rotating speed is disclosed, where an output unit continuously outputs the square wave signal and the output unit is electrically connected to a time-delaying adjustment circuit, so that a duty-ratio formed not equal to 50% is outputted to control the fan rotating speed, whereby a particular duty-ratio is provided to control the fan rotating speed after a control chip for fan rotating speed is pulled out.

Abstract: A method for monitoring an electric motor employing a pulse-type rotational position sensor includes monitoring a signal output from the pulse-type rotational position sensor and a reference signal associated with a control signal for the electric motor. A position of a rotor of the electric motor coincident with the reference signal is determined based upon a nominal rotor position, a nominal rotational speed of the rotor and a time between the reference signal and a falling edge of the signal output from the pulse-type rotational position sensor. The electric motor is controlled based upon the position of the rotor.

Abstract: A method of controlling an output voltage of an inverter driving an electric motor may include removing harmonic components of an output current, which is output to the electric motor, by using a low pass filter and obtaining a fundamental component of the output current; calculating a current total harmonic distortion by using the fundamental component of the output current; comparing the current THD with a reference current THD; determining a pulse width modulation method to be changed from a first modulation method for reducing the harmonic components of the output current to a second modulation method for reducing a switching frequency of the inverter if the current THD is less than the reference current THD, the PWM method modulating a pulse width of a control pulse signal for controlling the output voltage of the inverter; and/or generating the control pulse signal based on the determined PWM method.

Abstract: The invention includes a three-phase full-bridge power converter, a motor generator driven by the power converter, a pulse number generator which determines the number of pulses included in the driving signal for one electrical cycle, a voltage command generator which determines a modulation factor and a phase angle of driving voltage, and a pulse generator which generates the driving signal, and, in this invention, the pulse generator generates the driving signal having a pulse waveform which minimizes power loss in the power generator and the motor generator according to the number of pulses, the modulation factor, and the phase angle.

Abstract: A fault protection system of a power system of a dynamically positioned vessel is provided. The power system has a power distribution bus having three or more bus subsections, electric connections including bus ties which connect the bus subsections in a ring configuration, and circuit breakers connected between the bus subsections. The fault protection system includes a generator circuit breaker for coupling a generator to a bus subsection, feeder circuit breaker(s) for coupling load(s) to the bus subsection, a first circuit breaker for connecting one end of the bus subsection to a bus tie that provides an electric connection to another bus subsection, the first circuit breaker being a bus tie breaker, a second circuit breaker for coupling another end of the bus subsection to a further bus subsection, protection relays for operating the circuit breakers, and communication links between protection relays that exchange information via said communication links.

Abstract: A control system is described that includes a first rotating machine, a second rotating machine, and a motor controller physically mounted to and communicatively coupled with the first rotating machine and communicatively coupled with the second rotating machine. The motor controller includes a first PWM generator operable to generate a first set of pulse width modulated signals for application to the first rotating machine, and a second PWM generator operable to generate a second set of pulse modulated signals for application to the second rotating machine.

Abstract: A method is provided for operating a power tool having a motor powered by a battery. The method includes: delivering power from the battery to the motor in accordance with an operator input; detecting a condition of the power tool indicating a shutdown of the power is imminent; and fading the power delivered from the battery to the motor, in response to the detected condition, through the use of a controller residing in the power tool.

Abstract: A method for calculating a motor constant of a permanent magnet type synchronous motor according to the present invention includes: a voltage applying step of applying a voltage obtained by compositing a DC component and an AC component to a permanent magnet type synchronous motor while varying a frequency of the AC component; a current detecting step of detecting a motor current flowing according to the applied voltage; a phase difference calculating step of calculating a difference in phase between the AC component of the applied voltage and an AC component of the motor current; and a motor constant calculating step of calculating a motor constant of the permanent magnet type synchronous motor. In addition, in the motor constant calculating step, the motor constant is calculated based on the applied voltage and the motor current when the difference in phase becomes nearly 45 degrees.

Abstract: A method of controlling a brushless motor that includes exciting a winding of the motor until current in the winding exceeds a threshold, and then continuing to excite the winding for an overrun period. The length of the overrun period is adjusted in response to a change in one of time, motor speed and excitation voltage. Additionally, a control system that implements the method, and a motor system that incorporates the control system.

Abstract: In various embodiments a circuit arrangement is provided, having a bridge circuit including at least two switches connected in series; a bridge node which may provide a phase voltage arranged between the at least two switches; an electric motor having at least one phase winding coupled with the bridge node; a decoupling switch; a controller, wherein in an error case the controller may be configured to switch off the at least two switches, to determine whether a predefined condition is satisfied, and to one of delayed switching off the decoupling switch; and switching off the at least two switches and the decoupling switch simultaneously, depending upon whether the predefined condition is satisfied; wherein the controller may determine that the predefined condition is satisfied when the decoupling switch may be switched off without damage from the current applied to it when the at least two switches are switched off.

Abstract: A rotating electrical machine control apparatus includes a plurality of rotating electrical machine controllers and a target voltage setting device. Each of the rotating electrical machine controllers includes a rotating electrical machine and a power supply controller configured to perform power supply control on the rotating electrical machine. The rotating electrical machine controllers have different imposed loads. The target voltage setting device is configured to set DC-side voltages of the rotating electrical machine controllers to a target voltage defined as a thermal equilibrium voltage which represents the DC-side voltages obtained when the rotating electrical machine controllers are in a thermal equilibrium condition.

Abstract: Apparatuses for positioning and moving an object are provided. One apparatus positions/moves the object within a two-dimensional space having the shape of a convex polygon. Another apparatus positions/moves the object within a three-dimensional space having the shape of a convex polyhedron. Yet another apparatus separately positions/moves two different attachment points on the object within the bounds of the lateral faces of a three-dimensional space having the shape of a convex prism.

Abstract: An actuating apparatus has an actuator including a link having a plurality of joints and a plurality of motors for actuating the joints, and a controller for controlling the actuator. The controller controls the motors with a control torque m_?_cntrl calculated according to the equation: m_?_cntrl=M·(I?mEff)?1·(dd?_cntrl?mEff·dd?_cntrl—p)+C_cmpn from a target angular acceleration dd?_cntrl, a preceding target angular acceleration dd?_cntrl_p, a displaceable member torque response matrix Eff, an inertial matrix M, and a dynamic corrective force C_cmpn.

Abstract: There may be disclosed a controlling method of a laundry treating apparatus including a low speed rotation step of rotating a motor configured to rotate a drum mounted in a tub at a low speed; and a high speed rotation step of rotating the motor at a high speed, the high speed rotation step implemented after the low speed rotations step, wherein the high speed rotation step comprises an acceleration period in which a RPM of the motor is increased after the RPM of the motor reaches a target RPM of the low speed rotation speed, such that the amount of the additionally supplied wash water may be reduced and that the washing course can be implemented, using a small amount of wash water.

Abstract: A regulating method and device for loss-optimized operation of a separately excited synchronous machine having a stator and a rotor are provided. The method may include: providing reference values for stator and rotor currents, wherein the reference value for the stator current and/or the reference value for the rotor current or an auxiliary parameter representing the reference value of the stator current and/or an auxiliary parameter representing the reference value of the rotor current is dependent on a predefined reference torque; providing maximum values for stator and rotor currents; comparing reference values for the stator and/or rotor currents or an auxiliary parameter representing the reference value of the stator current and/or an auxiliary parameter representing a reference value of the rotor current to the corresponding maximum values and reducing of the reference torque by a torque value if at least one reference value reaches or exceeds the corresponding maximum value.

Abstract: A variable-speed hoisting machine uses an electric motor having a pull-rotor brake as a hoisting motor and capable of supplying the electric motor with an electric current that can reliably release the pull-rotor brake at the time of starting an operation even in the case of a variable-speed hoisting machine such as an electric chain block in a variable-speed hoisting machine having an electric motor with a pull-rotor brake and an inverter controlling the speed of the electric motor in a soft-start manner, the inverter is set to operate according to a predetermined voltage-frequency (V-F) pattern.

Abstract: A system incorporating an actuator connected to a polarity-insensitive two-wire communications bus. The actuator may have an electromechanical mover, a processor connected to the electromechanical mover, and a potentiometer, having a number of address settings, connected to the processor. A setting of the number of settings of the potentiometer may be a selection of an address for the actuator on the communications bus. There may be additional actuators and a controller connected to the communications bus. Each actuator may have an address which is different from an address of the other actuators connected to the communications bus. If an actuator is substituted with a replacement actuator, then a setting of a plurality of settings on a potentiometer of the replacement actuator may be selected to obtain an address that is the same as the address of the actuator which is substituted.