50results about How to "Wide output range" patented technology

Front left and right wheel units (FL, FR) are driven by an engine (ENG) and a motor generator (MG2). Rear left and right wheel units (RL, RR) are independently driven by in-wheel motor type motor generators (MGR, MGL). The motor generator (MG2) and the motor generator (MGR, MGL) are configured to have different rated outputs, respectively, and be subjected to different speed reduction ratios, respectively, between the motor generators and their respectively associated drive wheel units, and thus have characteristics, respectively, in efficiency with respect to torque and vehicular speed, that exhibit high efficiency in mutually different output ranges, respectively. When a mileage oriented mode is selected as a traveling mode, an ECU (30) determines how a drive torque should be allocated between the motor generators (MG2, MGR, MGL), as based on the motors' required drive torque and vehicular speed and on each motor generator's characteristic in efficiency, to maximize the motor generators' total efficiency.

The invention discloses a wide-range bidirectional conversion circuit and a control method. The wide-range bidirectional conversion circuit comprises a three-stage bidirectional converter and a control unit, and the three-stage bidirectional converter is formed by sequentially connecting a non-isolated DC/DC converter, an isolated DC/DC converter and a DC/AC inverter. When the system works in theforward direction, a direct-current power supply or energy storage equipment realizes grid-connected energy feedback through the non-isolated DC/DC converter, the isolated DC/DC converter and the DC/AC inverter; and during reverse working, an alternating voltage supplies power to a direct-current load or charges an energy storage device through a rectifying circuit, the isolated DC/DC converter and the non-isolated DC/DC converter. In order to adapt to different power levels and realize higher input current ripple control, the non-isolated converter adopts a multi-phase interleaved parallel structure; and in order to further broaden the requirements of input and output ranges in practical application, the isolated converter can be controlled by adopting a full-bridge/half-bridge variable structure. The whole system has the advantages of wide input direct-current voltage range, wide output alternating-current voltage range, wide load range, small current ripple, high-frequency isolation, high efficiency, energy conservation, environmental protection and the like.

The technique of the invention sets a relationship between the throttle opening (corresponding to the accelerator opening), the vehicle speed, and the target torque of a drive shaft, so as to enable a greater braking torque to be output in a working status of a cruise control system than a braking torque, which is output to the drive shaft in a full closed position of the accelerator opening in a non-working status of the cruise control system. This arrangement ensures output of a sufficient braking force to the drive shaft even under the condition of a relatively large drive load applied to the drive shaft, for example, during a downslope run, thus enabling the vehicle speed to be certainly kept at a preset level under the control of the cruise control system.

A circuit comprises an inductor, a load, and a controllable switching device arranged in either a first configuration: switchable between the load being bypassed and the inductor energised, and current flowing through the load, and the inductor discharging energy into the load; or, a second configuration: switchable between current being permitted to flow through the load, inductor and controllable switching device in series, energising the inductor, and the current flowing through the load, and the inductor discharging energy into the load. The circuit further comprises control means for controlling the switching device, a load current sensing resistor connected in series with the load, and a demand signal input. Monitoring means is arranged to monitor the demand signal and the voltages across the sense resistors, and generate a monitor signal. The control means is arranged to receive the monitor signal and to switch the switching device in response the monitor signal exceeding a predetermined threshold.

A differential circuit comprises first and second differential pairs driven by constant-current sources, respectively, for receiving input voltages, first transistors, second transistors, and switches are included. In a first connection state, one current mirror comprises among the first transistors. Input and output terminals of the one current mirror are connected to outputs of the first differential pair. Two current mirrors are composed by the second transistors. Inputs of the two current mirrors are connected to the outputs of the second differential pair, and the outputs of the two current mirrors are connected to an input and an output of the one current mirror circuit. The output of the one current mirror is a first output. In a second connection state, one current mirror comprises among the second transistors. The input and the output of the one current mirror are connected to the outputs of the second differential pair. Two current mirrors are composed by the first transistors. The inputs of the two current mirrors are connected to the outputs of the first differential pair, and the outputs of the two current mirror circuits are connected to the input and the output of the one current mirror circuit, respectively. The output terminal of the one current mirror is a second output terminal.

The invention discloses a sample-and-hold amplifier which comprises a primary sample-and-hold circuit and a secondary sample-and-hold circuit. The input positive terminal and the input negative terminal of the primary sample-and-hold circuit receive an external signal, the output positive terminal and the output negative terminal of the primary sample-and-hold circuit are coupled to the input positive terminal and the input negative terminal of the secondary sample-and-hold circuit, the primary sample-and-hold circuit is provided with a primary operational amplifier with the amplification being less than a multiple, and the secondary sample-and-hold circuit is provided with a secondary operational amplifier which realizes the amplification more than the multiple; after the external signal is sampled, held and amplified, by the primary sample-and-hold circuit and the secondary sample-and-hold circuit, the external signal is output from the output positive terminal and the output negative terminal of the secondary sample-and-hold circuit. Meanwhile, the invention discloses a sample-and-hold method. The sample-and-hold amplifier, as a basic signal processing module, is used for front end processing of the external input signal; and the sample-and-hold amplifier ensures the speed and the precision of the signal conversion with the simple structure on the premise of realizing high reliability.

The invention provides a wearing multifunctional tactile electric stimulation wrist band, which comprises a wrist band body, a control device and a plurality of stimulation points, wherein the control device is arranged on the wrist band body; a control circuit is arranged in the control device; the plurality of stimulation points are arranged on the inner wall of the wrist band body and are connected with the control circuit. Compared with the prior art, the wearing multifunctional tactile electric stimulation wrist band has the following beneficial effects that multi-channel light-weight electric stimulation equipment with wide output range and high stimulation precision is used; the communication is performed through Internet devices such as low-power-consumption Bluetooth and mobile phones; different stimulation conditions are preset; constant current electric pulses are output for stimulating the skin during condition triggering; rich electric tactile experience can be obtained. The requirements for the multi-channel light-weight electric stimulation equipment which are not met in the prior art are met; the requirement of providing rich artificial tactile sensation by the intelligent wrist band is met.

A differential amplifier has an upper/lower and a left/right symmetric structure. The differential amplifier improves output voltage swings and gain without the need for additional circuits for driving current sources or voltage sources. The differential amplifier includes a first current source, a second current source, a first inverter, a second inverter and a self bias control circuit. The first current source and the second current source provide a first bias current and a second bias current. The self bias control circuit maintains the first bias current and the second bias current at a constant level. Therefore, the differential amplifier provides constant current without additional circuits for driving current sources or voltage sources, and achieves a wider range of voltage output swings and a higher gain, as compared to conventional differential amplifier configurations.

A buck-boost converter includes: a converting circuit; a ripple injector; a hysteresis comparator; and a switching controller. The converting circuit is configured to generate an output voltage by adjusting an input voltage in a buck mode, a boost mode, and a buck-boost mode. The ripple injector is configured to generate a ripple based on switching signals corresponding to switching operations of the converting circuit. The hysteresis comparator outputs at least one switching control signal by comparing an output control voltage with a feedback voltage generated by adding the ripple to a divided voltage generated by performing a voltage division on the output voltage. The switching controller is configured to change a current flow path of the converting circuit based on the at least one switching control signal.

The invention relates to a resonance compensation method for a wireless power transmission system with a random constant-voltage output. According to the method, all-range accurate regulation on an output voltage is achieved through a controllable leakage inductance compensation method under the condition of not changing existing SS and PS compensation network structures, and the method has the characteristics of being wide in output voltage range, high in practicability, simple, easy to use and the like.

The invention discloses a sampling holder, which comprises a first-level sampling hold circuit and a second-level sampling hold circuit, wherein input positive and negative terminals of the first-level sampling hold circuit are connected with external signals; output positive and negative terminals of the first-level sampling hold circuit are coupled to input positive and negative terminals of the second-level sampling hold circuit; the first-level sampling hold circuit is provided with a first-level operational amplifier which realizes amplification below one multiple; the second-level sampling hold circuit is provided with a second-level operational amplifier which realizes amplification above one multiple; the external signals are sampled, held and amplified by the coordination of the first-level and second-level sampling hold circuits, and are output from output positive and negative terminals of the second-level sampling hold circuit. The invention also discloses a sampling hold method. Serving as a single processing basic module, the sampling holder is used for performing front-end processing on external input signals, and ensures the speed and precision of signal conversion by using a simple structure on the premise of realizing high reliability.

The invention relates to a detection test device for thermal overload relay characteristics and a control method. The detection test device comprises an industrial personal computer, a contactor control circuit, a motor regulating circuit, a main circuit and a relay control circuit, wherein the contactor control circuit and the motor regulating circuit are controlled by the industrial personal computer; the main circuit is arranged as a 220V power supply which is connected with a primary coil of a voltage regulator; a secondary coil of the voltage regulator is connected with the primary coil of a transformer through two normally open contacts of the contactor; hollow mutual inductors are respectively arranged on the tap sides at different levels on the secondary coil of the transformer; the hollow mutual inductors are connected with the industrial personal computer. The detection test device has the advantages that the current is automatically stabilized; the output scope of the current-stabilizing power is wide; the ratio of the maximal output to the minimal output is 300; the device can automatically time after the ending of the current stabilization; after the sample acts, the action time is automatically recorded and the test result is kept; the device is safe and reliable; the speed is high and the current stabilizing precision can reach 1%; the scope of current output is wide; the current is automatically adjusted, the time is recorded and the test result is stored in the test process.

The invention discloses a standard discharge quantity signal generating device for an oscillation wave partial discharge test. The device comprises a controller, a power source management module, a battery module, a button module, a D/A signal conversion module, a voltage boosting module, an analog switch module, a standard capacitor module and a signal output interface; the power source management module is connected with the controller and the battery module; the battery module supplies power to each module; the D/A signal conversion module is connected with the voltage boosting module; thecontroller, the D/A signal conversion module and the boost boosting module are connected with the analog switch module; the analog switch module is connected with the standard capacitor module; and the standard capacitor module is connected with the signal output interface. With the standard discharge quantity signal generating device provided by the technical schemes of the device of the invention adopted, the periodic output of standard electric quantity pulse signals is realized; discharge quantity precision is high; an output range is wide; and a cable oscillation wave fault detection system can be accurately verified. The standard discharge quantity signal generating device can be used to verify the performance and accuracy of an oscillation wave partial discharge test system.

The present invention provides a semiconductor laser element, a method of fabrication thereof, and a multi-wavelength monolithic semiconductor laser device that achieve self-sustained pulsation up to a high output level and achieve self-sustained pulsation over a wide output range. A semiconductor laser element that exhibits self-sustained pulsation in a predetermined output region, said semiconductor laser element comprising: a substrate; a first conductive type clad layer formed on said substrate; an active layer formed on said first conductive type clad layer for emitting light by current injection; a second conductive type first clad layer formed on said active layer; and a stripe-shaped second conductive type second clad layer formed on said second conductive type first clad layer in a first direction, in such a manner that the cross-sectional surface of said stripe-shaped second conductive type second clad layer in a direction perpendicular to said first direction has a shape having an upper edge and a lower edge that face each other and side edges that connect between said upper edge and said lower edge, where the minimum width thereof is at least 70% but no more than 100% of the maximum width.

A motor control system configured to be mounted to a movable object that moves by using a drive motor, the motor control system comprising: a sensor configured to detect an output requested to drive the movable object; a battery configured to supply electric power to the drive motor; and circuitry configured to control the drive motor such that a requested amount of rotary power of the drive motor is output in a specified output range, the requested amount of the rotary power of the drive motor being set on the basis of a detection value of the output sensor.

Disclosed is a switched reluctance generator current conversion system with a self-variable power generation voltage self-charging function; the switched reluctance generator current conversion systemconsists of a storage battery, ten switch tubes, six diodes, four capacitors, a three-phase winding and an inductor, and the whole current conversion system structure does not need an isolation link;the problem that the power generation voltage cannot be actively adjusted is solved by means of the current conversion system and the control method thereof, so that the adaptability of the system isgreatly improved; in the fourth and fifth modes of high-voltage output, the current can be relatively quickly reduced by changing the reverse voltage mode of the phase winding, so that the power generation current in the power generation stage is indirectly controlled, the power generation output capability is improved, the power generation output capacity is also improved and no extra device isneeded by means of the current conversion system; the storage battery can be automatically charged through the PWM effect of only one tenth switch tube; and the system is suitable for the various fields applied to the switched reluctance generators, such as the application of the wind power field.

The invention relates to a method for rolling a metal band in a continuous line installation with coupling of the pickling and cold rolling processes. According to the invention, the composition of the pickling fluid is determined to allow the running of the band in the bath at a minimum speed of a few meters per minute, and similar running speeds are maintained in the pickling and rolling sections, during the operating phases, whereas the rolling conditions are determined in order to maintain the requested quality of the band at a minimum rolling speed that may be as low as 1 meter per minute.

The invention discloses a co-location differential speed reducer which is a speed reducer with a co-location differential gear train. A transmission structure of the co-location differential speed reducer is designed by combining differential logics and multiple logics, the reduction ratio is negatively correlated with the difference value of two contrast rotating speeds, and the difference valuecan be infinitely close to zero from the positive direction and the negative direction, so that the reduction ratio can tend to be infinitely great or infinitely small, how large the reduction ratio is is not mainly determined by how large the multiple of geometrical parameters of assemblies of a transmission gear train is and is mainly determined by how approaches the multiple of geometrical parameters of two transmission gear trains is, under the condition that the sizes are equal, a wide output range and a large reduction ratio can be obtained, or under the same reduction ratio, the size issmaller or the load capacity is larger. On the basis, multiple zero-backlash transmission methods are adopted to reduce return difference, and multiple other technical means are matched to obtain more excellent comprehensive performance and a larger application range.

The invention relates to a resonance compensation method for a wireless power transmission system with a random constant-current output. According to the method, all-range accurate regulation on an output current is achieved through a controllable leakage inductance compensation method under the condition of not changing existing SP and PP compensation network structures, and the method has the characteristics of being wide in output current range, high in practicability, simple, easy to use and the like.