56results about How to "Improve control responsiveness" patented technology

An apparatus is provided for controlling drive of a motor mounted on a vehicle and formed to have a rotor and a stator equipped with a plurality of phases of coils to be supplied by current in turn, phase by phase, to rotate the rotor. The apparatus comprises a voltage detector, temperature detector, setting block, and current-supply block. Of these, the voltage detector detects a voltage of power to be applied to the motor, while the temperature detector detects a temperature of the motor. The setting block uses the detected temperature and the detected voltage of the power to set a target torque at which the motor should generate a torque. The current-supply block supplies current to the motor so that the motor generates the torque on the target torque set by the setting block.

The invention relates to a power network model-based wind power field automatic voltage control method which comprises the following steps of: 1, reading original data and building a wind power field power network mathematical model; 2, reading a wind power field real-time running working condition and a voltage target value released by the power grid dispatching; 3, carrying out load flow calculation to obtain initial load flow distribution on the basis of the former two steps; 4, distributing and releasing the reactive power reference value of a wind driven generator according to a sensitivity ordering strategy; 5, distributing and issuing the reactive power reference value of a dynamic reactive compensation device according to the sequence; and 6, confirming and releasing the tapping point gear reference value of an on-load tap changing transformer according to a step-by step adjustment strategy. According to the power network model-based wind power field automatic voltage control method, the unified coordination control among the reactive power of the wind power field wind driven generator, the reactive power of the dynamic reactive compensation device and the tapping joint of the on load tap changing transformer can be realized.

A switching apparatus is provided in a hydraulic control apparatus having a fluid transmission apparatus; a lockup clutch; a switching valve that controls engagement of the lockup clutch; and a control oil pressure generation apparatus that pressurizes oil and outputs a control oil pressure to control activation of the switching valve. The switching apparatus executes a control to warm the oil input into the control oil pressure generation apparatus if the temperature of the oil is below a predetermined temperature and prohibits execution of the control to warm the oil input into the control oil pressure generation apparatus if the temperature of the oil equals or exceeds the predetermined temperature.

A remote access system for controlling, from the outside, apparatuses connected to a home network, wherein a gateway capable of improving the responsiveness of control on the apparatuses is obtained. The present invention is provided with: a sensor information collection unit (206) for collecting information about the status of a sensor connected to the home network; a management center cooperation unit (203) for transferring the status information to a management center and acquiring, from the management center, simplified-rule information which is part of a control rule defined by the management center, the simplified-rule information including a condition that applies when controlling a home electrical appliance; a simplified-rule database (204) for managing the simplified-rule information; and a home electrical appliance control unit (205) for controlling a home electrical appliance on the basis of the simplified-rule information and the status information.

Control device for a 4WD vehicle is provided. The 4WD vehicle includes a driving force source, main driving wheels, auxiliary driving wheels, a driving force transmission shaft, a first disconnection mechanism, and a second disconnection mechanism. The first disconnection mechanism and the second disconnection mechanism are engaged during 4WD traveling. One of the first disconnection mechanism and the second disconnection mechanism is a clutch. The control device includes an electronic control unit. The electronic control unit is configured to execute engagement control for controlling the engagement force of the clutch so that the driving force transmission shaft is maintained in a state prior to the initiation of a continuous increase in the rotation speed of the driving force transmission shaft.

The vehicle includes a vehicle body having a steering section and a drive section connected together; a steerable wheel which steers the vehicle body; a drive wheel which drives the vehicle body; an inclination actuator apparatus for inclining the steering section or the drive section in a turning direction; a plurality of sensors which detect lateral accelerations; yaw angular velocity detection means; vehicle speed detection means; and a control apparatus which controls the inclination of the vehicle body by controlling the inclination actuator apparatus. The control apparatus performs feedback control on the basis of the lateral accelerations, calculates a link angular velocity predicted value from the derivative value of the yaw angular velocity and the vehicle speed, and controls the inclination of the vehicle body by performing feedforward control while using the calculated link angular velocity predicted value.

The pressure-type flow control device includes: a main body provided with a fluid channel communicating between a fluid inlet and a fluid outlet and an exhaust channel communicating between the fluid channel and an exhaust outlet; a pressure control valve fixed to a fluid inlet side of the main body for opening or closing the upstream side of the fluid channel; a first pressure sensor for detecting the internal pressure of the fluid channel on the downstream side of the control valve; an orifice provided in the fluid channel on the downstream side of the point of branching of the exhaust channel; an on / off valve for opening or closing the fluid channel on the downstream side of the first pressure sensor; and an exhaust valve for opening or closing the exhaust channel.

A variable valve actuation apparatus of an internal combustion engine has a multinodular-link motion converter, to vary at least a working angle. A position of rotation of a control shaft, variably adjusting the attitude of the motion converter, is set, so that, at a peak lift during a valve opening period, an angle γ2 between an extension line of a line segment connecting a first fulcrum corresponding to a drive-eccentric-cam center and a second fulcrum provided on a rocker arm and a line segment connecting the second fulcrum and a third fulcrum provided on the rocker arm at a position different from the second fulcrum at a middle working-angle control mode is less than both an angle γ1 between the two line segments at a minimum working-angle control mode and an angle γ3 between the two line segments at a maximum working-angle control mode.

A self-opened type valve is opened by motor torque of an electric motor. Therefore, a diaphragm is not necessary for opening the valve, and downsizing of a valve drive apparatus for opening the valve is possible. Since the valve is assembled to the motor shaft of the electric air pump via a motion-direction conversion mechanism, an opening action of the valve can start in a short time after a rotational action of the impeller of the electric air pump starts, so that control responsiveness is improved. At a rotation stop of the impeller of the electric air pump, the valve can be maintained in a fully closed condition by an urging force of the coil spring, thereby preventing exhaust gases or condensed water from entering into an inside of the electric air pump.

When a voltage conversion operation is started, a control circuit (30) performs an operation to obtain a voltage command value for each control timing with setting a target voltage obtained based on a torque command value (TR) and a motor rotation number (MRN) as a final value, and controls a boost converter (12) so as to match an output voltage (Vm) with the voltage command value. The control circuit (30) has a prescribed threshold value set to be lower than the target voltage. The control circuit (30) controls the boost converter (12) with setting an absolute value of a rate of change between control timings to a first value until the voltage command value reaches the prescribed threshold value. When the voltage command value becomes at least the prescribed threshold value, the boost converter (12) is controlled with setting the absolute value of the rate of change to a second value smaller than the first value.

The construction vehicle is provided with an engine, a clutch, a travel device, a work equipment, a drive force setting dial, and a controller that includes: a theoretical value determination unit that determines a theoretical value, for the degree of engagement to make the upper limit value of the drive force equal to a set drive force; an operational state determination unit that determines whether the work equipment is outputting the drive force in a predetermined travel direction; a drive force determination unit that determines whether the drive force is greater than the set drive force; and a degree of engagement reduction unit that, if of operational state determination and of drive force determination are both affirmative, causes the degree of engagement to approach the theoretical value.

A steering speed-computing section (81) to differentiate a steering angle of a steering wheel from a steering angle sensor (18) to compute the steering speed signal, a low-pass filter (82) to cut high frequency components in the steering speed signal to output a correction steering speed signal, a switching section (87) to switch the cut-off frequency in the low-pass filter to be higher at the time of determining a high-speed steering condition, and a flow quantity-computing section (85) to compute a target flow quantity supplied to a power steering output section (8) based on the steering angle signal and the correction steering speed signal are provided to control a flow quantity of an operating oil supplied to the power steering output section (8) for the target flow quantity.

When a voltage conversion operation is started, a control circuit (30) performs an operation to obtain a voltage command value for each control timing with setting a target voltage obtained based on a torque command value (TR) and a motor rotation number (MRN) as a final value, and controls a boost converter (12) so as to match an output voltage (Vm) with the voltage command value. The control circuit (30) has a prescribed threshold value set to be lower than the target voltage. The control circuit (30) controls the boost converter (12) with setting an absolute value of a rate of change between control timings to a first value until the voltage command value reaches the prescribed threshold value. When the voltage command value becomes at least the prescribed threshold value, the boost converter (12) is controlled with setting the absolute value of the rate of change to a second value smaller than the first value.

The vehicle-use generator includes a first rotor core having a first field coil wound therearound, a second rotor core having a second field coil wound therearound, a rotating shaft belt-driven by a vehicle engine, the first and second rotor cores being mounted in tandem on the rotating shaft, a stator core having a stator coil wound therearound, and disposed radially outwardly of the first and second rotor cores so as to form a circumferential gap with the first and second rotor cores. The first and second field coils are connected substantially in parallel to each other when viewed from an external field current supply source supplying field currents to the first and second field coils.

The vehicle includes a vehicle body having a steering section and a drive section connected together; a steerable wheel which steers the vehicle body; a drive wheel which drives the vehicle body; an inclination actuator apparatus for inclining the steering section or the drive section in a turning direction; a plurality of sensors which detect lateral accelerations; yaw angular velocity detection means; vehicle speed detection means; and a control apparatus which controls the inclination of the vehicle body by controlling the inclination actuator apparatus. The control apparatus performs feedback control on the basis of the lateral accelerations, calculates a link angular velocity predicted value from the derivative value of the yaw angular velocity and the vehicle speed, and controls the inclination of the vehicle body by performing feedforward control while using the calculated link angular velocity predicted value.

A hydraulic pressure supply system of an automatic transmission for a vehicle may include a low-pressure hydraulic pump receiving oil stored in an oil pan through an input line, generating low hydraulic pressure using the oil, and supplying the low hydraulic pressure to a low pressure portion through a low-pressure line, and a high-pressure hydraulic pump increasing a portion of the low hydraulic pressure to high hydraulic pressure and supplying the high hydraulic pressure to a high pressure portion through a high-pressure line.

The invention relates to a reactive power control method for a water-light complementary power station, which is used for grid-connected point voltage control of the water-optical complementary powerstation, and the reactive power support thereof is realized by a hydropower unit and a photovoltaic inverter. When the voltage fluctuates, the inertia of the excitation system is relatively large, theexcitation lag and the reactive power response deviation exist. The deviation is regarded as the reactive power setting of the photovoltaic inverter to compensate the reactive power response deviation. When the excitation system is adjusted, the reactive power output of the photovoltaic inverter decreases gradually, and the grid point voltage is mainly controlled by the hydroelectric excitation system. In order to prevent frequent operation of hydroelectric generating units and photovoltaic inverters, the dead-time range of voltage deviation is set. If the voltage deviation exceeds the dead-time range, the closed-loop control is effective. At the same time, in order to improve the response speed of voltage loop, the final reactive power setting value is obtained by compensating the reactive power loss of the water-optical complementary power station.

A four-wheel drive control system is provided which comprises a driving force distribution mechanism for transmitting a driving force from a power source to main driving wheels of a vehicle and capable of distributing the driving force to auxiliary driving wheels of the vehicle, a rotational speed difference detector for detecting a rotational speed difference between the main and auxiliary driving wheels, and a driving force distribution controller for controlling a distribution of the driving force to the main and auxiliary driving wheels on the basis of the rotational speed difference, wherein the driving force distribution controller determines a driving force to be transmitted to the auxiliary driving wheels on the basis of an output of the power source, a longitudinal load distribution in the vehicle and the rotational speed difference. A four-wheel drive control method is also provided.

The pressure-type flow control device includes: a main body provided with a fluid channel communicating between a fluid inlet and a fluid outlet and an exhaust channel communicating between the fluid channel and an exhaust outlet; a pressure control valve fixed to a fluid inlet side of the main body for opening or closing the upstream side of the fluid channel; a first pressure sensor for detecting the internal pressure of the fluid channel on the downstream side of the control valve; an orifice provided in the fluid channel on the downstream side of the point of branching of the exhaust channel; an on / off valve for opening or closing the fluid channel on the downstream side of the first pressure sensor; and an exhaust valve for opening or closing the exhaust channel.

The invention refers to a turbo chiller, concretely a turbo chiller which can easily detect and adjust the refrigerant liquid level of a condenser. The turbo chiller comprises a compressor comprising impellers used for compressing a refrigerant; a condenser used for performing heat exchange on the refrigerant flowing from the compressor and cooling water; an evaporator used for performing heat exchange on the refrigerant discharged from the condenser and the cool water; an expansion valve arranged between the condenser and the evaporator; more than two sensors arranged at different heights in increasing direction of the refrigerant liquid level and used for detecting the refrigerant liquid level in the condenser; and a controlling part used for adjusting the aperture of the expansion valve in dependence on the refrigerant liquid level detected by the sensors.

A glow plug may include: i) a hollow plug housing that is mounted on a plug mount in an insulation status; ii) a center shaft that is fixed to one end of the plug housing in an insulation status and receives power from the outside; iii) a heating unit that is connected to the center shaft and the other end of the plug housing, and generates heat using a potential difference; and iv) a connecting unit that insulates the plug mount and the center shaft, is coupled to the plug mount, and electrically connects with center shaft with the plug housing.

A switching element driving circuit includes a current detection unit that outputs a driving stop signal based on a level of current flowing through the switching element, and first and second control elements each connected to a control terminal of the switching element. A comparator controls the first control element based on a result of comparison of an output voltage of the driving circuit main unit with a first reference voltage. A differential amplifier drives the second control element in accordance with a voltage difference between the output voltage of the driving circuit main unit and a second reference so as to maintain the output voltage equal to the second reference voltage. An operation stopping unit stops the comparator and the differential amplifier to drive the first and second control elements, respectively, in response to the driving stop signal.

A switching apparatus is provided in a hydraulic control apparatus having a fluid transmission apparatus; a lockup clutch; a switching valve that controls engagement of the lockup clutch; and a control oil pressure generation apparatus that pressurizes oil and outputs a control oil pressure to control activation of the switching valve. The switching apparatus executes a control to warm the oil input into the control oil pressure generation apparatus if the temperature of the oil is below a predetermined temperature and prohibits execution of the control to warm the oil input into the control oil pressure generation apparatus if the temperature of the oil equals or exceeds the predetermined temperature.

Disclosed herein are an apparatus and a method for controlling PWM switching frequency that employ a negate PWM scheme to thereby increase PWM switching frequency, improve control responsiveness, andreduce the size of the circuit. The apparatus includes: a power factor correction (PFC) converter configured to convert an AC voltage into a DC voltage, the converter comprising a transistor controlling an operation of the PFC converter and a current sensor for measuring an electric current flowing through the transistor; and a controller configured to receive an output from the current sensor andcalculate a duty ratio of a switching signal applied to a gate terminal of the transistor. The controller applies the calculated duty ratio to the switching signal in an on-duty period of the switching signal.

According to an embodiment of the present invention, an engine system comprises: an engine including a plurality of combustion chambers for generating a driving force by combustion of fuel; a plurality of intake lines in which external air supplied to the combustion chambers flows; and electric superchargers individually installed in the intake lines.

The invention, which is applicable to the technical field of robots, provides a control response method and device for a steering engine and a steering engine. The method comprises: acquiring an action instruction issued by a main control unit; acquiring an instruction control parameter of a steering engine corresponding to the action instruction and determining a plurality of working periods having a correspondence relationship with the instruction control parameter; acquiring current running time of the steering engine; and determining the working periods in which the running time is locatedand performing the response to the action instruction based on the instruction control parameter corresponding to the working period. With the control response method and device and the steering engine, the steering engine can meet the motion needs at different working periods of robot joints, thereby guaranteeing the fast response at starting time, stable running, and shaking and overshooting prevention at stopping time effectively; and thus the adaptability and response control effect of the steering engine in actual items are enhanced.

A glow plug may include: i) a hollow plug housing that is mounted on a plug mount in an insulation status; ii) a center shaft that is fixed to one end of the plug housing in an insulation status and receives power from the outside; iii) a heating unit that is connected to the center shaft and the other end of the plug housing, and generates heat using a potential difference; and iv) a connecting unit that insulates the plug mount and the center shaft, is coupled to the plug mount, and electrically connects with center shaft with the plug housing.