Abstract: A motor assembly includes a motor, a controller controlling at least one aspect of operation of the motor, and a control housing defining a control chamber. The controller is in part received within the control chamber. The controller includes a main electronics board and a modular connector assembly. The modular connector assembly includes a secondary electronics board and a connector at least in part supporting the secondary electronics board. The connector includes an inner connector portion and an outer connector portion. The connector extends through the control housing such that the inner connector portion is disposed inside the control chamber and the outer connector portion is disposed outside the control chamber. The outer connector portion defines a first access portal facilitating access to a first component of the secondary electronics board.

Abstract: A cooling assembly for a power tool includes an air mover configured to be disposed within a housing assembly at a first end of a generally longitudinal enclosure proximate to a handle enclosure. The air mover is configured to direct air into the housing assembly and then generally perpendicularly to a longitudinally extending direction of the generally longitudinal enclosure. The cooling assembly also includes a duct configured to connect to the air mover and be in fluid communication with the air mover to direct air into the handle enclosure. The duct includes an inflow segment defining a first area for receiving the air from the air mover, an outflow segment defining a second area for directing the air from the air mover into the handle enclosure, and a connecting segment connecting the inflow segment to the outflow segment.

Abstract: Methods and apparatus to monitor the precharging of high voltage circuits are disclosed. In one embodiment, an apparatus includes a switch that selectively enables or disables precharge current to a high voltage circuit based on a switch control signal. The apparatus also includes a comparison circuit that compares a scaled version of a circuit voltage to a reference voltage to generate the switch control signal. In one embodiment, the switch control signal is generated to enable the precharge current when the scaled version of the circuit voltage is greater than the reference voltage.

Abstract: An object of the present invention is to provide a power conversion device capable of reducing an influence of electromagnetic noise propagating from a circuit body toward a drive circuit board. A power conversion device 100 of the present invention includes a circuit body 6 that converts a direct current into an alternating current, a drive circuit board 5 that drives the circuit body 6, a base member 4 provided between the circuit body 6 and the drive circuit board 5, and a case 1 that houses the circuit body 6 and the base member 4. The base member 4 includes a first flow channel forming portion 4A that forms a flow channel space 1C1 between the circuit body 6 and the base member 4, and a first extending portion 4B2 extending from the flow channel forming portion 4A and connected to an inner surface of the case 1.

Abstract: A system for controlling a synchronous motor drive may be configured to receive a command voltage signal and to identify, in the synchronous motor drive, a resistance imbalance signature from the command voltage signal. The system may determine, based on the resistance imbalance signature, respective phase resistances that correspond to phases of a synchronous motor of the synchronous motor drive. Each respective phase resistance may include a phase transistor resistance and a phase winding resistance. The system may identify, based on the phase resistances and an estimated average resistance between the phases of the synchronous motor, one or more phases of the synchronous motor that correspond to one or more phase resistances representing a resistance imbalance.

Abstract: A multi-phase permanent magnet rotor motor comprises a plurality of phase coil windings with each phase coil winding having two free ends and the plurality of phase coil windings being without a common node. A controller is provided comprising a plurality of full-bridge inverters. Each full-bridge inverter has two output ends electrically connected to the two free ends of a corresponding phase coil winding. The controller is configured to operate the plurality of full-bridge inverters to output pulse modulated control signals to their respective phase coil windings. The outputted pulse modulated control signals can comprise a combination of sine wave signals and full-bridge space vector modulation signals.

Abstract: A motor assembly includes a motor, a controller controlling at least one aspect of operation of the motor, and a control housing defining a control chamber. The controller is in part received within the control chamber. The controller includes a main electronics board and a modular connector assembly. The modular connector assembly includes a secondary electronics board and a connector at least in part supporting the secondary electronics board. The connector includes an inner connector portion and an outer connector portion. The connector extends through the control housing such that the inner connector portion is disposed inside the control chamber and the outer connector portion is disposed outside the control chamber. The outer connector portion defines a first access portal facilitating access to a first component of the secondary electronics board.

Abstract: The present disclosure includes techniques for implementing a variable speed drive (VSD) in an environmental conditioning system to facilitate mitigating or eliminating system faults. The variable speed drive drives a motor during on-cycles and heats motor windings of the motor during off-cycles. The variable speed motor drive includes a rectifier that converts alternative-current (AC) power input to a direct-current (DC) power output, a DC bus that is coupled to the rectifier and includes a DC bus transistor, and an inverter. The DC bus transistor pre-charges a DC capacitor of the DC bus to drive the motor during on-cycles and receives a gate pulse with a duty cycle based on a differential temperature, where the gate pulse heats the motor windings. The inverter receives the gate pulse applied to the DC bus transistor and transmits it a motor winding to prevent moisture on the motor winding.

Abstract: Presented are high-voltage electrical systems with optimized pulse width modulation (PWM) control, methods for making/using such systems, and vehicles with enhanced electric drive capabilities via PWM type and frequency control. A method of operating an electrical system includes an electronic controller determining a PWM region layout with multiple PWM regions arranged in a torque-speed curve calibrated to an electric motor and power inverter. The controller selects one of the PWM regions based on a speed and torque of the motor, and selects a PWM type based on this selected PWM region. The controller selects a PWM switching frequency style based on the selected PWM region, and selects a PWM switching frequency based on the selected PWM region, switching frequency style, and PWM type. The controller commands a power inverter to regulate transfer of electrical power between a rechargeable battery and the motor based on the PWM type and switching frequency.

Abstract: A semiconductor module such that warping or distortion is prevented, and reliability can be increased, is obtained. The semiconductor module includes a base configuring a multiple of terminals or wires, a semiconductor switching element mounted on a mounting portion of the terminal, and a molded resin that seals the semiconductor switching element, wherein a wide portion having a width greater than that of the terminal or the wire is formed in one portion of the terminal or the wire in an outer peripheral side end portion of the molded resin, and the wide portion is embedded and fixed in an interior of the molded resin in a state extended toward the interior from the outer peripheral side end portion of the molded resin.

Abstract: A liquid discharging apparatus includes: a discharging head that discharges liquid onto a medium; first and second components that are operable for discharging the liquid onto the medium; first and second control circuits that control driving of the discharging head; a first control circuit board on which the first control circuit is provided; a second control circuit board on which the second control circuit is provided; wherein the first component is electrically coupled to the first control circuit, the second component is electrically coupled to the second control circuit, a minimum distance between the first control circuit board and the first component is shorter than a minimum distance between the first control circuit board and the second component, and a minimum distance between the second control circuit board and the second component is shorter than a minimum distance between the second control circuit board and the first component.

Abstract: A DC voltage network includes at least three energy storage networks, each having an energy store supplying a DC voltage, and at least three power converters implemented as DC voltage converters. The energy store and the power converters are electrically connected at a common point, At least three DC voltage sub-networks are each connected to a respective power converter of the energy storage networks. A feed device connects a respective DC voltage sub-network to an AC voltage network. The DC voltage network may be installed in a vehicle, in particular a ship. In a method of controlling the DC voltage network in the event of a fault, at least one of the power converters is switched off to protect the DC voltage network, depending on the location of the fault.

Abstract: A half-bridge switching module is one of a plurality of half-bridge switching modules coupled to an input voltage to regulate energy provided to a load in response to a system controller. The half-bridge switching module includes a low-side switch. A low-side control is referenced to ground and is coupled to the low-side switch. A high-side switch is coupled to the low-side switch. A high-side control circuit is coupled to the high-side switch and is referenced to a floating node of the half-bridge switching module. A single fault terminal is coupled to a fault bus coupled to the system controller. The fault bus consists of a single wire. The single fault terminal is configured to provide multidirectional multi-fault group communication between the plurality of the half-bridge switching modules and the system controller through the fault bus.

Abstract: A method is provided for operating a rotating field machine of a motor vehicle, wherein at least two winding systems of the rotating field machine are supplied with current from an intermediate circuit via a transmission device having at least two switching units and wherein respective switching sequences for the switching units for supplying the winding system in question are defined. For the switching sequences, first switching states in which current is drawn from the intermediate circuit and second switching states in which no current is drawn are defined. The first switching states of the respective switching sequences are defined so as to be free of overlap. For at least one of the switching sequences, third switching states are defined, in which current is fed into the intermediate circuit. The third switching states are defined so as to overlap with the first switching states of the other switching sequence.

Abstract: Two inverters provided at both ends of each open-end winding, respectively, are appropriately controlled. A rotating electrical machine control device (1) that has at least two control schemes among pulse width modulation control, active short-circuit control, and rectangular-wave control, as control schemes for a first inverter (11) and a second inverter (12), and that can control the first inverter (11) and the second inverter (12) by control schemes which are independent of each other considers one of the plurality of control schemes as a first control scheme and one of the plurality of control schemes different than the first control scheme as a second control scheme, and has a control mode in which the first inverter (11) is controlled by the first control scheme and the second inverter (12) is controlled by the second control scheme.

Abstract: A method of controlling an electric power assisted steering (EPS) apparatus comprises a plurality of inverter bridges each connected to a multi-phase motor configured to provide power assist to steering of a vehicle. After detection of a failure within one of said inverter bridges, the current flow within the faulty inverter bridge is controlled, and one or more of the other inverter bridges is used to provide power assistance. A control system for an electric power assisted steering (EPS) apparatus comprises a plurality of inverter bridges each connected to a multi-phase motor configured to provide power assist to steering of a vehicle, selection means for selectively operating switches in an inverter bridge in which a failure has been detected to control the current flow within the faulty inverter bridge, and control means for controlling one or more of the other inverter bridges to provide power assistance in accordance with the method.

Abstract: A gate driving circuit applied to motor inverter includes first power switch circuit, first and second bootstrap fast charging circuits, and first, second and third capacitors. The first power switch circuit includes first and second power switches. The first bootstrap fast charging circuit is electrically connected to the first power switch. The second bootstrap fast charging circuit is electrically connected to the second power switch. The first capacitor is electrically connected to the first power switch. The second capacitor is electrically connected to the first bootstrap fast charging circuit and first insulated switch. The third capacitor is electrically connected to the second bootstrap fast charging circuit and second insulated switch. When the first power switch is disabled and the second power switch is enabled, an independent power supply enables the second bootstrap fast charging circuit to charge the third capacitor to enable the second insulated switch.

Abstract: This application discloses an apparatus, an inverter system, and a method for synchronizing carriers. The apparatus includes a modulation unit, a current processing unit, and a control unit. The control unit can adjust, based on a change trend between an amplitude of a first harmonic current and an amplitude of a second harmonic current and a change trend between a phase of a first carrier and a phase of a second carrier, a phase of an input carrier input into the modulation unit, to decrease an amplitude of a harmonic current output by an inverter and improve stability of a distributed power supply system. Further, a prior-art problem that impact of a harmonic current on a power supply system cannot be reduced by synchronizing carriers in a process of synchronizing carriers based on a zero sequence current is avoided, thereby improving the stability of the distributed power supply system.

Abstract: The method: determines, within the switching cycle, when current is not provided to the DC-bus capacitor, determines, for each switching cycle, the sector of a reference vector, active vectors durations and null voltage vectors durations, determines from the determined durations, sampling instants, samples the currents through the three phases and the DC-bus voltage at the determined sampling instants, determines, from the phase currents sampled at the determined sampling instants, the current flowing through the DC-bus capacitor during the active vectors, estimates the capacitance value and/or the equivalent series resistance value of the DC-bus capacitor, compares the capacitance value and/or the equivalent series resistance value to a threshold and determines if the DC-bus capacitor reaches its end of life according to the comparison result.

Abstract: In a dual-inverter type of motor control apparatus which controls a synchronous motor having two or more open-end armature windings corresponding to respective phases, first and second inverter control circuits control the motor by supplying voltage commands to corresponding ones of the two inverters, with a combination of respective control methods executed by the inverter control circuits for generating the voltage commands being determined such as to provide a high speed of control response, while preventing control interference caused by effects of component characteristic disparities, such as deviations between timings of updating the voltage commands by the two inverter control circuits.

Abstract: To improve the performance of the voltage filter. Rather than reducing an area of a region surrounded by a closed loop formed in a voltage filter 12A, an induced electromotive force generated in the voltage filter 12A itself is reduced by forming a pair of a closed loop CA and a closed loop CB in which the directions of the generated induced electromotive forces are opposite to each other by making a wiring 100 (anode wiring) intersect a wiring 200 (cathode wiring).

Abstract: A powertrain for a vehicle includes an electric machine coupled with a first inverter, a traction battery and a second inverter. The traction battery is coupled between a neutral terminal of the electric machine and a negative terminal of the first inverter. The second inverter is coupled in parallel with the first inverter with respect to a direct current (DC) bus, and configured to drive a second electric machine.

Abstract: Lands (11c and 11d) are parts of base plates (104c and 104d), and electrodes of a shunt resistor (103U) are put on and connected to the lands (11c and 11d). Slits (130 and 131) are formed in the lands (11c and 11d) to separate a main electric circuit in which a main current flows and control terminals (123 and 124) with which the electric potentials of the electrodes of the shunt resistor (103U) are detected. Leading end portions of the slits (130 and 131) extend to the vicinity of the electrodes of the shunt resistor (103U).

Abstract: An electric power system of a vehicle with an electric drive obtained by means of an electric machine; the electric power system has: a storage system provided with a first pack of chemical batteries and with a second pack of chemical batteries; a first electronic DC-AC power converter, which has a direct current side connected to the first pack of chemical batteries and an alternating current side connected to the electric machine; and a second electronic DC-AC power converter, which has a direct current side connected to the second pack of chemical batteries and an alternating current side connected to the electric machine, in addition and in parallel to the first electronic power converter, so that the electric machine can be controlled by the first electronic power converter or by the second electronic power converter.

Abstract: An electric motor driving apparatus controls driving of an electric motor having two or more phase windings whose ends are open by using first and second inverters. A control unit includes a first inverter control circuit and a second inverter control circuit. The first inverter control circuit generates a first voltage command as an output voltage command to the first inverter based on a torque command. The second inverter control circuit generates a second voltage command as an output voltage command to the second inverter. The control unit determines a composite voltage command based on a first voltage command vector and a second voltage command including a case, in which a pure phase difference between the first voltage command vector on a dq coordinate corresponding to the first voltage command and the second voltage command vector on the dq coordinate corresponding to the second voltage command is other than 180°.

Abstract: In the field of voltage assemblies with a charge storage capability for use in high voltage direct current converters there is provided a corona shield. The corona shield includes a peripheral frame which is formed from one or more frame members and within which lies a frame aperture. The corona shield also includes a barrier member that is fixedly secured to the peripheral frame. The barrier member extends across and occludes the frame aperture to inhibit bodily ingress through the frame aperture.

Abstract: An operational amplifier circuit includes a potential control circuit connected between a current sense semiconductor element connected in parallel with a main semiconductor element and a current detection resistor. The potential control circuit controls an output potential of the current sense semiconductor element to be equal to that of the main semiconductor element. The potential control circuit includes a current control element controlling an output current of the current sense semiconductor element and an operational amplifier outputting a signal corresponding to an output potential difference between the current sense semiconductor element and the main semiconductor element to the current control element. An input offset voltage polarity determination unit determines a polarity of an input offset voltage of the operational amplifier according to the output potential difference.

Abstract: A control circuit includes a discharge circuit, a control logic, and an output. The output is communicatively coupled to a control terminal of a power transistor. The control circuit further includes an input communicatively coupled to an input of the transistor. In a discharge mode of operation, the control logic is configured to provide a control terminal voltage to the control terminal of the power transistor via the output. The control terminal voltage is configured to operate the power transistor linearly to dissipate energy stored in a capacitance connected to an input of the power transistor/In the discharge mode, the discharge circuit is configured to receive a discharge current from an output of the power transistor, and to dissipate remaining energy undissipated by the power transistor.

Abstract: A medical instrument processor includes an enclosure, a liquid distribution system, and a disinfectant concentration measuring subsystem. The enclosure is configured to hold a medical instrument. The liquid distribution system is configured to deliver a disinfection solution to a medical instrument within the enclosure. The liquid distribution system has a liquid outlet. The disinfectant concentration measuring subsystem includes a first mixing chamber in fluid communication with the liquid outlet, a pump that is configured to simultaneously pump the disinfection solution and the reagent solution into the first mixing chamber, and a concentration analysis assembly that is operable to determine a concentration of disinfectant in a sample solution that is output from the first mixing chamber. The reservoir is in fluid communication with the first mixing chamber.

Abstract: In some examples, an apparatus includes an inverter with a switching circuit. Furthermore, a first circuit has a first circuit ground and a second circuit has a second circuit ground. For example, the second circuit may be electrically connected to the switching circuit, and the second circuit ground may be electrically connected to the first circuit ground. A first capacitor may be electrically connected between the first circuit ground and a main ground. In addition, a second capacitor may be electrically connected between the second circuit ground and the main ground. Additionally, a first impedance of a first conductive path to the main ground may be greater than a second impedance of a second conductive path to the main ground. The first conductive path may include the first circuit ground and the first capacitor, and the second conductive path may include the second circuit ground and the second capacitor.

Abstract: An interface arrangement is configured to couple an alternating current, AC, power system with a direct current, DC, power system, or vice versa. The interface arrangement includes a plurality of series-connected converter modules. Each converter module includes at least one multi-level converter cell configured to provide a voltage contribution to at least a portion of an AC waveform for example based on voltage of the DC power system. Each converter module includes at least one converter valve, electrically connected to the multi-level converter cells and including at least two anti-parallel thyristors. The converter valves are switchable between conducting states with a selected current conduction direction and a non-conducting state so as to selectively control polarity of any voltage contribution provided by the at least one multi-level converter cell. The converter valves can also serve as fault protection, e.g. to divert overcurrents.

Abstract: A control board of a power conversion device, the control board includes a board main body, a plurality of drive circuits, a power source control circuit, an insulation region, a plurality of insulation transformers, and a connecting line that electrically connects the plurality of insulation transformers and the power source control circuit to each other, and at least a part of which extends in a region in inner layers of the board main body that overlaps the insulation region when viewed in a perpendicular direction with respect to the surface of the board main body.

Abstract: A semiconductor device may be provided. The semiconductor device may include a latch control signal generation circuit configured to compare a count signal counted according to the number of times that a command is inputted to the latch control signal generation circuit with a random signal having a random combination to generate a latch control signal which is enabled, based on an update signal. The semiconductor device may include a storage circuit configured to latch an address to generate a latched address, based on the latch control signal. The semiconductor device may include an internal circuit configured to receive the latched address to execute an internal operation.

Abstract: A powertrain for a vehicle includes and electric machine and a plurality of inverters. The electric machine may include a stator defining a plurality of stator teeth separated by slots that are configured to accept windings. The plurality of inverters may each be configured to exclusively drive a current in some but not all of the windings within slots such that some of the plurality of stator teeth within a sector of the stator are configured to be energized by only one of the inverters.

Abstract: The present disclosure relates to actuators. The teachings thereof may be embodied in an actuator drive for a flap or for a valve for setting a gaseous or liquid volume flow, for example in the heating, ventilation, and/or air conditioning of a building, for a DC motor with a reduction gear connected downstream and a gearbox-side output. The actuator may include: a motor control unit and a voltage supply unit. The motor may be a brushless two-phase DC motor with a stator comprising a quadruple T armature, each armature comprising an armature coil and a radially outward-lying rotor mounted to rotate relative to the stator. Each armature may have precisely four alternating permanent magnetic poles uniformly distributed. The rotor is connected to a spring applying a restoring force to the rotor if the rotor is deflected from a rest position.

Abstract: In a control apparatus for a rotating electric machine, a phase feedback gain is set such that first and second conditions are met. The first condition is that gain margin and phase margin in frequency characteristics of a first loop transfer function are ensured. The second condition is that a gain intersection angular frequency in frequency characteristics of the first loop transfer function is lower than respective resonance angular frequency in frequency characteristics of first and second transfer functions. An amplitude feedback gain is set such that third and fourth conditions are met. The third condition is that gain margin and phase margin in frequency characteristics of a second loop transfer function are ensured. The fourth condition is that a gain intersection angular frequency in frequency characteristics of a second loop transfer function is lower than respective resonance angular frequency in frequency characteristics of third and fourth transfer functions.

Abstract: A power conversion device is mounted with a control circuit, a plurality of drive circuits for driving switching elements in response to control signals from the control circuit, and a plurality of power supply circuits for supplying power to the drive circuits on a substrate. The power conversion device has a drive-circuit/power supply-circuit placement and wiring regions of a high current system in which the drive circuits and the power supply circuits are disposed on the substrate are provided for the respective switching elements with isolating regions interposed between the drive-circuit/power supply-circuit placement and wiring regions and the control circuit of a low current system. A gap is formed between the pairs of the drive-circuit/power supply-circuit regions. Power supply transformers are provided for transforming a voltage supplied from the control circuit for the respective power supply circuits in-between the isolating regions.

Abstract: A CPAP system includes a flow generator (10), a patient interface (50), an air delivery conduit (20) that interconnects the flow generator and the patient interface, wherein the air delivery conduit has an internal diameter of less than 19 mm. Preferably the air delivery conduit has an internal diameter of between about 10 mm and about 18 mm. The CPAP system may also include a controller for compensating for pressure swings and/or increased impedance within the system. Preferably the blower includes a low inertia blower.

Abstract: An inverter control method for a hybrid vehicle includes: monitoring a torque command and a motor speed of the vehicle in real-time; determining whether the motor speed is less than a first speed; determining whether an absolute value of the torque command is less than a first torque when the motor speed is less than the first speed; changing a switching frequency to a predetermined frequency when the absolute value of the torque command is less than the first torque; and controlling an inverter operation by generating a pulse-width modulation (PWM) signal with the switching frequency changed to the predetermined frequency.

Abstract: A capacitor connected to the battery in parallel; a step-up converter connected to the battery and the first capacitor; another capacitor connected to the step-up converter in parallel; an inverter connected to the step-up converter and the other capacitor in parallel; a potential line connecting a negative-side terminal of the battery to the capacitor, the step-up converter, the other capacitor, and the inverter in the stated order; and a bypass path formed, when a lower arm switching device of the step-up converter has a short-circuit failure, from cutting the reference electric potential line at a position including at least any one of a position between the negative-side terminal and the capacitor and another position between the step-up converter and the other capacitor. The bypass path bypasses the lower arm switching device and connects the negative-side terminal to the inverter.

Abstract: A power quad flat no-lead (PQFN) package includes a driver integrated circuit (IC) situated on a leadframe. The PQFN package further includes low-side U-phase, low-side V-phase, and low-side W-phase power switches situated on the leadframe. A logic ground of the leadframe is coupled to a support logic circuit of the driver IC. A power stage ground of the leadframe is coupled to sources of the low-side U-phase, low-side V-phase, and low-side W-phase power switches. The power stage ground can further be coupled to gate drivers of the driver IC.

Abstract: The present invention relates to a method for determining an operating strategy for a range extender (10) of an electric vehicle (100) having an electric motor (20) and an electrical energy store (30), with the following method steps: detecting (S1) at least one operating parameter of a first type associated with the range extender (10) and at least one operating parameter of a second type associated with the electric motor (20) and/or the electrical energy store (30); and determining (S2) the operating strategy for the range extender (10) by restricting a usage level of the range extender (10), wherein the restriction of the usage level is determined on the basis of the at least one detected operating parameter of the first type and/or the at least one detected operating parameter of the second type.

Abstract: A power converter has a phase leg with upper and lower switching devices coupled across a DC link. A junction between the devices is coupled to a load. A current sensor detects direction of current flow from the junction to the load. A gate driver activates the devices according to upper and lower gate signals in response to pulse-width modulation (PWM) to generate nominal gate signals from a variable duty cycle. When the positive current direction is detected then the upper gate signal has turn-on and turn-off times shifted by a predetermined offset with respect to the nominal signals, and dead-times are added to the lower gate signals. When the negative direction is detected then the lower gate signal has turn-on and turn-off times shifted by the predetermined offset with respect to the nominal signals, and dead-times are added to the upper gate signals.

Abstract: A fan driving circuit drives a first fan and a second fan which are connected in parallel and connected to an anode of a direct current power. The fan driving circuit includes a pulse width modulation signal generation module, a phase lock and delay module, a first pulse output comparator and a first capacitor. The width modulation signal generation module is connected between an external power and the first fan. The phase lock and delayed module is electrically connected to the pulse width modulation signal generation module. The first capacitor is connected between the DC and the ground. The first fan is supplied as normal by a PWM power supply, the second fan is powered by “shadow” and out-of-phase pulses taken from an inductor in the first fan and stored in the capacitor, to achieve a “two-for-one” power supply aspect, which saves power and reduces operational noise.

Abstract: A motor is provided having a consequent-pole type rotor that has soft magnetic material poles and magnetic poles positioned around the rotor in an alternating manner. A convex surface on each of the poles is formed as a surface in which a midpoint of the convex surface has a radial distance from the rotation axis that is greater than a radial distance of the circumferential edges of the convex surface from the rotation axis. A radial width of a first magnetism transfer part of a cylindrical yoke and a radial width of a second magnetism transfer part of the magnetic pole fulfill a relationship such that an appropriate balance of the magnetic resistance between the first magnetism transfer part and the second magnetism transfer part is achieved. As a result, cogging torque is reduced without reducing output torque.

Abstract: In a driving system, an applying module applies, in response to an input of an on or off command as a switching command, a switch signal to a target switching element as a high- or low-side switching element to switch the target switching element to be an on or off state. A measuring module measures a delay period defined as a time interval from a first time to a second time. The first time represents a time at which the switching command is switched from one of the on command and the off command to the other. The second time represents a time at which the target switching element is actually switched to be the on or off state. An adjusting module adjusts, based on the delay period, an input timing of a next switch signal applied from the applying module to the target switching element.

Abstract: An inverter control apparatus and a control method thereof are provided. The inverter control apparatus and a control method thereof stably operate a three-phase motor using a capacitor having a small capacitance for a DC link. The inverter control apparatus includes a current sensor to sense an output current of the inverter, a voltage sensor to sense a DC-link voltage of the inverter, and a controller to generate an average of a periodically varying rotor based q-axis current boundary value based on the output current and the DC-link voltage to generate a current reference on the basis of the average of the rotor based q-axis current boundary value, and to drive a three-phase motor based on the current reference. Stabilized variable speed control of a motor by using a small-capacitance capacitor for a DC link of an inverter is performed and reliability of an inverter circuit improved.

Abstract: A sensing insert device (100) is disclosed for measuring a parameter of the muscular-skeletal system. The sensing insert device (100) can be temporary or permanent. Used intra-operatively, the sensing insert device (100) comprises an insert dock 202 and a sensing module 200. The sensing module (200) is a self-contained encapsulated measurement device having at least one contacting surface that couples to the muscular-skeletal system. The sensing module (200) comprises one or more sensors (303), electronic circuitry (307), and communication circuitry (320). The electronic circuitry (307) operatively couples to the one or more sensors (303) to measure the parameter. A transmitter (309) transmits parameter measurements. An induction coil (1404) is coupled electromagnetically to a wireless energy source (1402). The induction coil converts electromagnetic energy waves to a signal that powers the sensing module (200). The signal includes information or data.

Abstract: The invention relates to an image plate readout device, the readout device comprising receiver elements for the reception of an image plate and/or a transfer element intended for an image plate. In connection with the readout device is provided, for detecting an object, at least one sensing element, which is in turn set in data communication with the readout device in such a way that, upon detecting an object, the sensing element delivers a signal to the readout device. In response to being triggered by a signal delivered by the sensing element, the readout device executes some function.

Abstract: A current detection circuit for detecting a maximum current value in a three-phase motor includes an identifier configured to identify a maximum current phase having the maximum current value among phases of the motor, and a detector configured to detects the maximum current value by summing current values of phases other than the maximum current phase when the current direction in the maximum current phase is a predetermined first direction.