57results about How to "High electromagnetic conversion efficiency" patented technology

A MEMS mirror device includes a rectangular frame, a mirror unit having a reflecting portion on one face thereof and connected via the hinges inside the frame, and a drive unit for tilting the mirror unit around the hinges as the axis, wherein the frame has two protruding portions spaced at a regular interval and extending into the frame on both sides of a connected portion with the hinge, and an elastic member is provided to bridge the hinge between two protruding portions.

PROBLEM TO BE SOLVED A problem is to provide a sheet-like or thin plate-like coil device that can guarantee a high power transmission efficiency, that has quite little magnetic spurious radiation, that does not cause overheat even in the case of long charge, and that can be manufactured at low cost.

MEANS FOR SOLVING THE PROBLEMS The present coil device is characterized in that two spiral patterns composing a basic pattern are each formed into regular triangle, and are arranged in back to back manner sharing each of base side lines of those two triangles so that the basic pattern is formed into a rhombic S-shape as a whole.

The invention discloses a five-degree-of-freedom co-excited bearing-less switched reluctance motor system and a control method. The system is composed of a switch reluctance motor, a hybrid magnetic bearing and a radial magnetic bearing, wherein bias windings of the two bearings and an m-phase armature winding of the switch reluctance motor share the same set of power converter; with the adoptionof a co-excited manner, biased magnetic flux is generated in the two bearings when torque is generated in the switch reluctance motor; the m-phase armature winding adopts the traditional switch reluctance drive mode; and the current of the bias winding is only related to working conditions of the switch reluctance motor, and no control is performed. In addition, current of five suspending windingsis reasonably controlled by combining with the current of the bias winding collected in real time, so that five-degree-of-freedom suspension operation can be realized. According to the system disclosed by the invention, suspension force is decoupled, the suspension force and the torque are also decoupled, the control variable is less, the suspension control is simple, the integration level is high, the reliability is high, no permanent magnet exists in the system, the environmental suitability is high, and the system has unique advantages in high-speed or ultra-high-speed application occasions.

The invention discloses a short magnetic circuit reluctance motor, and double stator magnetic poles, a rotor core and a wound rotor. The three-phase 9/3 pole short magnetic circuit reluctance motor divides nine groups of double stator magnetic poles distributed on the circumference of a stator (1) at equal intervals into three sections in axial direction, wherein the length of the middle section is equal to that of a main magnetic pole and the middle section is manufactured by overlapping silicon-steel sheets; other main and auxiliary magnetic poles are manufactured into appropriate shapes by soft iron so that the three sections of main and auxiliary magnetic poles can be formed into the double stator magnetic pole with an annular groove for placing exciting windings after being combined together; then, the nine exciting windings (L1, L2, L3, L4, L5, L6, L7, L8 and L) are respectively arranged in each annular groove to obtain three-phase exciting windings (L1, L4, L7 and L2, L5, L8 and L3, L6, L9) on the circumference of the stator (1) in turn according to the rule of equilateral triangles; and then, a three-salient pole rotor core (3) consisting of a multi-cambered surface lug boss is arranged on a hollow rotor shaft lever (4) with internal thread and forms rotating connection with a stator part through a periphery connecting and fixing device of a motor.

The invention provides a multifunctional electromagnetic pulse experiment instrument which comprises a wide-range adjustable DC power supply composed of two regulated power supplies; the experiment instrument also comprises a multi-frequency direct-reading and ultra-low frequency adjustable pulse frequency controller, a high voltage generator demodulated by the pulse frequency controller, a high voltage ammeter, a movable experimental component and a pulse switch signal output socket; an experiment platform with a high-voltage discharge prevention shell is constructed on the top part of the experiment instrument; the movable experiment component and an adjustable electromagnet are mounted on the platform. The multifunctional electromagnetic pulse experiment instrument not only can output the stable high-voltage direct current, but also can output the pulse high-voltage electricity with adjustable frequency and pulse width, and output the pulse magnetic field or provide independent pulse switch signals for various electromagnets. The multifunctional electromagnetic pulse experiment instrument can be adopted for conducting a plurality of high-voltage static experiments and the experiments in biological, physical and medical fields efficiently and conveniently. The invention provides an electromagnetic pulse experiment instrument which has the advantages of complete functions, convenient application, low cost and practicality for the college teaching and research.

The invention provides an electromagnetic heating safe energy-saving electric baking pan which comprises a shell, an upper heating plate, a handle, a hinge and a lower heating plate, and further comprises thermal insulation plates and coils which are arranged in the upper heating plate and the lower heating plate, a magnetic strip and a control circuit in the shell; the lower heating plate is supported above the shell, the upper heating plate is supported behind the lower heating plate on the shell through the hinge, is concentric with the lower heating plate and is buckled on the lower heating plate through mortises; and the coils are spirally distributed uniformly on a plane, and are respectively installed in the upper groove of the upper heating plate and the lower groove of the lower heating plate to be electrically connected with the control circuit. The electromagnetic heating safe energy-saving electric baking pan has the advantages and beneficial effects that the coils generate eddy current to heat the upper heating plate and the lower heating plate, and the plate surface are quickly heated after being electrified; and the thermal insulation plate is thin, a small gap is reserved between the heating plates and the coils, so the electromagnetic conversion efficiency is high, more electric energy is saved, the electromagnetic heating safe energy-saving electric baking pan is convenient to maintain and long in service life, and because the electric heating is completely isolated, the safety performance is improved.

The invention discloses a brushless electronic water pump. The brushless electronic water pump comprises a shell body, an isolating sleeve and an upper cover which can be detachably fixed. The isolating sleeve divides the shell body and the upper cover into an installing chamber and a fluid chamber. A stator assembly and a PCB are fixed into the installing chamber. A rotor assembly is installed in the fluid chamber in a rotating manner. The upper cover is provided with a water inlet and a water outlet. The rotor assembly comprises an impeller and a connecting drum. A wear-resisting lubricating insert is fixedly inserted into an inner hole of the connecting drum. A center hole is formed in the wear-resisting lubricating insert. A magnet yoke drum is fixedly installed outside the connecting drum concentrically in a sleeving manner. A magnet ring drum is fixedly installed outside the magnet yoke drum concentrically in a sleeving manner. The isolating sleeve is provided with a locating center shaft which is inserted into the center hole. The shell body is provided with a heat dissipating device connected with the PCB in a heat-conducting manner. According to the brushless electronic water pump, a bearing does not need to be arranged on a rotor, no water inlet space is occupied, the reliability of the brushless electronic water pump is improved, and the service life of the brushless electronic water pump is prolonged.

The invention discloses a method and system for measuring dynamic electromagnetic loss of a giant magnetostrictive transducer. The method includes the following steps that: the driving coil input current measured by a signal measuring unit and an induced voltage signal on a detection coil enter a DSP through the processing of a signal conditioning circuit and AD sampling; the DSP quickly obtains the magnetic field strength peak value and the magnetic induction intensity peak value of a transducer bar during the working process by adopting a continuous comparison window comparison method; the rising edge generated by a zero-crossing capture circuit triggers the DSP interruption to start the timing of a timer to obtain the phase difference between the magnetic field strength and the magneticinduction intensity, so that the amplitude complex permeability of the bar and the electromagnetic loss during the actual working process of the bar can be measured. According to the method for measuring the dynamic electromagnetic loss of the giant magnetostrictive transducer disclosed by the invention, the electromagnetic loss of a broadband giant magnetostrictive transducer during normal working can be simply and quickly measured, and the influence of different driving currents, driving frequencies and prestress on the amplitude permeability and the electromagnetic loss of the transducer can be quickly reflected.

The invention relates to a quasi-ideal iron core, an electromagnetic conversion device using the same, and a method for producing the iron core and relates to the technical field of electromagnetism. Iron cores in prior art are of rectangular or annular frame structures, iron yoke portions coat coils or coils are bared in external space, magnetic leakage and electromagnetic vortex are large, the magnetic saturation value is low, and electromagnetic conversion efficiency is low. The quasi-ideal iron core is an equal magnetic flux section three-dimensional axisymmetric body or rotation body, an iron yoke coats and surrounds a coil without an air gap, a magnetic circuit is in smooth transition, and all magnetic force lines generated by the coil are directly incorporated into magnetic flux of the iron core, so that magnetic leakage and electromagnetic vortex of the iron core are furthest reduced, electromagnetic conversion efficiency and magnetic saturation values are high, high magnetic field intensity can be achieved by matching a superconducting coil with the iron core, and meanwhile, a production process for the equal magnetic flux section air-gap-free quasi-ideal iron core is disclosed; the iron core can be widely applied to occasions where equal electromagnetism generated by general and ultra-strong magnetic fields is converted.

A multi-purpose diplopore siamesed magnetic core is a diplopore siamesed whole '8'-shaped closed heteromorphic magnetic core which is formed by two '3'-shaped character patterns, namely two half-'8'-shaped character patterns; the column closure of the two '3'-shaped characters is provided with an air gap or not; and both sides thereof are completely symmetrical, thereby forming a completely closed magnetic circuit. The invention is characterized by having the advantages of simple assembly, easy electrical parameter adjustment, stable characteristics and good consistency. The invention improves the electromagnetic conversion efficiency on the condition of same cross-sectional area, leads the electromagnetic conversion efficiency to be over 96 percent, and simultaneously causes the working temperature of the magnetic core to be reduced to be below 135 DEG C. The invention reduces the length of the magnetic circuit, increases the area of the window, reduces the electromagnetic radiation and interference of the magnetic core when in work and lowers the cost.

The invention discloses an electromagnetic heating steam generator. The electromagnetic heating steam generator comprises a box body and is characterized in that a cooling water inlet pipe is arrangedin the box body, a cooling water pump is arranged at one end of the cooling water inlet pipe, a cooling water electromagnetic valve is connected with the cooling water pump through the cooling waterinlet pipe, the other end of the cooling water electromagnetic valve is connected with a cooling water flow signal sensor, the cooling water flow signal sensor is connected with an electromagnetic induction heating module water inlet, and an electromagnetic induction heating module water outlet is connected with a cooling water inlet silicone tube. Through arrangement of a circular water tank, thewhole steam generator effectively uses radiant heat energy in an electromagnetic coil inner circular water collection system, through filtering of a circular cooling water circulation system, the water flows into a system water collection tank, through pressurizing of a variable frequency pump, the water enters an electromagnetic steam generation device, and the use efficiency of the heat energycan be effectively improved.

The invention provides a constant power ballasting component, comprising: a magnetic core; a main coil arranged in the magnetic core, wherein the main coil at least includes a first tap, a second tap, a third tap and a fourth tap, wherein a coil of first number of turns is arranged between the first tap and the third tap, a coil of second number of turns is arranged between the first tap and the second tap, and a coil of third number of turns is arranged between the first tap and the fourth tap; a control unit that detects an input voltage and switches on one of the second, third and fourth taps and the first tap selectively according to the input voltage. The constant power ballasting component allows the corresponding number of turns to be adjusted and the tapping to be performed during winding of a choke coil according to voltage fluctuation, so that a lamp is kept operating substantially under the rated power to save energy.