165 results about "Power group" patented technology

The invention provides a dual-motor dual-energy composite drive system, which includes a power battery pack, a super capacitor pack, a DC/DC converter, a main drive motor, a main drive motor controller, an auxiliary drive motor, an auxiliary drive motor controller, Auxiliary drive shaft, main drive shaft and double input coupling drive axle. The supercapacitor bank is responsible for supplying power to the auxiliary drive motor, which provides auxiliary drive torque for the vehicle to start, accelerate, and uphill, and provides motor braking torque for braking feedback. The electric energy fed back by auxiliary motor braking is completely absorbed by the supercapacitor. The power battery pack is responsible for supplying power to the main drive motor and other electric accessories of the vehicle. When the power stored in the supercapacitor pack is lower than a certain limit, the power battery pack will perform compensatory constant power charging through the DC/DC converter. The output torques of the main drive motor and the auxiliary drive motor are coupled through a double-input drive axle to meet the vehicle's hill start and acceleration performance.

A fuel injector with various embodiments of a damper that reduces noise generated between a valve group subassembly and a power group subassembly during operation of the fuel injector. A mass damper is also shown and described. A method of reducing sound in the valve group subassembly is also disclosed.

The invention discloses a power battery group of an electric vehicle. The power battery group comprises a battery group shell and a plurality of battery modules arranged in the power group shell, and also comprises heat management parts integrated in the power group shell, wherein the heat management parts comprise a rear evaporator, a battery heater and a battery fan; the setting positions of the rear evaporator, the battery heater and the battery fan in the battery group shell need to meet the conditions that cold air formed by the rear evaporator and hot air formed by the battery heater are accelerated to circulate under the action of the battery fan and flow through all the battery modules. The power battery group disclosed by the invention has the advantages that closed design is adopted, so that the dustproof and waterproof grade is high; the heat management parts are arranged inside, and air ducts are simple in design and high in temperature consistency; on the basis of the power battery group, a charging management system and a heat management system are small in occupied space, have no heat loss in the conveying process and are low in cost; and the control integration level is high.

A variable power optical system includes, in order from the object side, a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power. The variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element. The second lens element has a convex shape on the object side. The final lens group includes a positive lens. The variable power optical system satisfies the following conditions:

10≦VdLg≦45

−1.0<(R2a−R2b)/(R2a+R2b)<1.0

where VdLg is the Abbe number of the positive lens of the final lens group with respect to the d line, R2a is the curvature radius of the object-side surface of the second lens element, and R2b is the curvature radius of the image-side surface of the third lens element.

An electrical energy supply system providing voltage to a load and including an external power group and a DC supply device is disclosed. The external power group provides an external voltage. The DC supply device includes a bus, a converting unit, a storage unit and a smart energy management system (SEMS). The bus receives the external voltage and is coupled to the load. The converting unit converts the external voltage into a converted voltage or converts a stored voltage to generate a converted result and provides the converted result to the bus. The storage unit stores the converted voltage or provides the stored voltage to the converting unit. The SEMS controls at least one of the converting unit, the external power group and the load according to at least one of the external voltage, a voltage level of the bus and a voltage level of the storage unit.

An image-capturing optical system (OP) has first and second prisms (P1, P2) for bending input light at approximately right angles. The optical axis (AX) at the light input surface of the first prism (P1) and the optical axis (AX) at the light output surface of the second prism (P2) are substantially parallel to each other. A lens element for forming at least one power group is provided on a light path sandwiched between the first and second prisms (P1, P2), and a power group located closest to the light input surface of the second prism (P2) is a positive power group. The light input surface of the second prism (P2) has a concave shape on the object side and satisfies the conditional expressions -4.2 < fp2/f < -0.2 (fp2: the focal length of the second prism, f: the focal length of the entire image-capturing optical system) and 0.2 < |f_lp/fp2| < 1.5 (f_lp: the focal distance of the power group located closest to the light input surface of the second prism).

A zoom lens comprises: a stationary group that is stationary at the time of variable power; and a variable power group, disposed on an image side of the stationary group, that makes a variable power operation by moving in an optical axis direction at the time of variable power, wherein the stationary group comprises: a first lens group including a negative meniscus lens and a positive lens and having a positive refractive power as a whole; and a second lens group, disposed on the image side of the first lens group, including: a negative lens group including a negative meniscus lens and a positive lens; and a positive lens group including at least one positive lens, in order from an object side, the second lens group having a positive refractive power as a whole.

The invention relates to a photovoltaic power station reactive power grouped adjustment method. The method includes the following steps that: load nodes are grouped; merging calculation is performed on power generation units in a station according to the correlation of generated power output and load, so that different power generation nodes can be formed, and the overall output of a system can track local load to the greatest extent; an objective function is built through adopting a multi-objective reactive power optimization algorithm, and the reactive target values of the power generation nodes are calculated through utilizing a hierarchical multi-particle swarm optimization algorithm, and reactive power adjustment instructions Qrefi to be distributed of the power generation nodes are calculated; and the reactive power adjustment instructions Qrefi to be distributed of the power generation nodes are distributed, and reactive power instructions Qrevi or power factor instructions cos theta invi of inverters are calculated according to the number of turned-on inverters in the inverters and the current operation states of the inverters under the power generation nodes, and the reactive power instructions Qrevi or power factor instructions cos theta invi of the inverters are transmitted to corresponding inverters. With the method adopted, the dimensionality and complexity of system optimization variables can be decreased, and the generation of a large number of invalid solutions can be avoided, and therefore, the accuracy and speed of reactive power distribution of the inverters can be improved.

The invention provides a wing connected unmanned plane. The front part of a plane body is provided with a fixed wing power group and a front wing, wherein the middle part of the plane body is hollow; an airplane control system and a power supply are put inside the plane body; the airplane control system is connected with the power supply through an electric wire; the back part of the plane body is provided with a back wing and a vertical fin; solar battery packs are uniformly distributed on the front wing and the back wing, and are connected with the power supply; the front wing and the back wing are connected through a lateral vertical wing; a machine frame is fixed on the airplane body positioned between the front wing and the back wing; a rotor wing power group is arranged on the machine frame. The wing connected unmanned plane has the advantages that the two leading functions of the solar energy and vertical taking-off and landing are combined; a fixed wing airplane with the connected wing layout is selected to be used as a main body; a solar panel is laid on the connected wing; the structure improvement is performed on the basis of the connected wing airplane; the installation of four rotor wings is completed; finally, the wing connected unmanned plane uses the solar energy as the auxiliary power; the problem of short electric flight time of the vertical taking-off and landing electric unmanned plane can be well solved.

In an embodiment, a server monitors a set of parameters associated with future power production capacity of a set of distributed power production units that belong to a power group supplying power to a given serving area of a power grid during a given period of time. The server predicts, for a portion of the given period of time, a temporary power production disruption that will affect the power group based on the monitoring. The server sends a control message to the power group based on the prediction. At least one power production unit in the power group receives the control message, and responsive to the control message diverts at least a portion of power being supplied to the given serving area to local storage, detects the temporary power disruption and conditions power supplied to the given serving area during the temporary power distribution based upon the locally stored power.

The invention relates to a self-adaptive moving target detection method capable of combining polarized classification and power grouping, mainly aiming at solving the problems that in the non-uniform scene, the clutter covariance matrix is low in estimation accuracy and poor in moving target detection performance. The method comprises the steps of: 1, synthetic aperture radar (SAR) image polarized classification; 2, initialized-power grouping; 3, group sample number check; 4, self-adaptive clutter reduction; and 5, constant false alarm rate detection. By adopting the polarized classification method to guide the screening of samples, the method solves the problem that the clutter characteristic difference is not considered in the existing sample screening method, thus having the advantages that the clutter covariance matrix is high in structure estimation accuracy and good in moving target detection performance. By adopting the power grouping method to guide the screening of samples, the method solves the problem that the existing sample power selection is overhigh in power estimation, thus having the advantages that clutter covariance matrix is high in power estimation accuracy and good in low-speed moving target detection performance.

The invention relates to a needle thread supplying device applied to a sewing machine; a power group for pushing a thread passing shaft group and driving a lifting plate to act is arranged on the needle thread supplying device; when the lifting plate enters for unfolding a needle thread clamp group, the thread amount between a support point and a thread hanging plate is the shortest and is also the smoothest; when the lifting plate exits the needle thread clamp group, the needle thread clamp group closely clamps suturing threads, the power group continuously pushes the thread passing shaft group for tensioning the suturing threads; the thread amount between the support point and the thread hanging plate is lengthened; and as the needle thread clamp group closely clamps the suturing threads, the suturing threads cannot obtain the thread amount between the support point and the thread hanging plate from the needle thread supplying device, and can only recycle the thread amount from the front end of the head of the suturing head; therefore, the length of a suturing needle thread is shortened, and the work on manually removing the length of extra thread heads is omitted.

The invention relates to a novel safety elevator, and belongs to the technical field of elevators. The novel safety elevator comprises a lift car, an elevator shaft, rack rails, gears and first powersources for driving the gears to rotate; the lift car is arranged in the elevator shaft, one side wall of the lift car is provided with a lift car door, the elevator shaft is provided with floor doorsat the positions, corresponding to the lift car door, of all floors of a building, the rack rails are installed on the shaft wall of the elevator shaft, the gears are rotatably mounted on the outer walls of the side walls of the lift car and are engaged with the rack rails, and the first power sources are also mounted on the outer walls of the side walls of the lift car; and the three shaft walls, without the floor doors, of the elevator are each provided with one rack rail, the gears and the first power sources form traveling power groups, the outer walls of the three side walls, without thelift car door, of the lift car are each provided with one traveling power group, and the three traveling power groups are in one-to-one correspondence with the three rack rails. By means of the structure, the novel safety elevator is more stable in running, no swinging occurs, the elevator cannot rush out of the top and fall to the bottom, and the safety factor is higher.

Provided is a resonant wireless power transmission system capable of automatically performing frequency conversion and resonance matching. An isolation power group of an energy emission end of the resonant wireless power transmission system provides power for a high-frequency signal generation unit, a high-frequency driving unit and a main circuit power amplification unit in a control circuit. The high-frequency signal generation unit of a signal generation unit is connected with a signal isolation unit connected with the high-frequency driving unit, and the high-frequency driving unit is connected with a frequency conversion and power amplification unit connected with an electric control switch group. The electric control switch group is connected with a first matching capacitor group (Ct) connected with an emission coil, the first matching capacitor group (Ct) and the emission coil form a resonant emission circuit, and an enabling control unit is connected with the high-frequency signal generation unit and the electric control switch group at the same time. A receiving coil group of an energy receiving end is connected with a second matching capacitor group (Cr), the receiving coil group and the second matching capacitor group (Cr) form a resonant receiving circuit, and power is supplied to a working load through frequency regulation.