51results about How to "Improved power to weight ratio" patented technology

A device for compressive treatment of a body part comprises a compression member, adapted to at least partly encircle the body part, and an actuation unit, arranged to tighten the compression member to provide a compressive force to the body part. The actuation unit comprises an active material actuator. There is also disclosed a system comprising such a device and methods for its therapeutic, cosmetic and non-therapeutic use and operation.

The invention discloses a starting power generation system for an electric automobile, which comprises a double salient pole starting power generator, a starting power generation controller and controller working power; the starting power generation controller comprises a bidirectional power conversion circuit, an exciting current detection unit, an output current detection unit, an output voltage detection unit, a position rotation speed detection unit, an armature current detection unit, an exciting main circuit and a digital signal processor, wherein the exciting main circuit includes an exciting relay, a rectification filter unit and a chopper circuit which are connected in series in turn; and the digital signal processor is connected with the exciting current detection unit, the output current detection unit, the output voltage detection unit, the armature current detection unit, the position rotation speed detection unit, and the control ends of the bidirectional power conversion circuit, the exciting relay and the rectification filter unit by signals respectively. The invention also discloses an electric automobile and a control method thereof. Compared with the prior art, the starting power generation system is simple in structure, low in cost and flexible to control.

A device for compressive treatment of a body part includes a compression member, adapted to at least partly encircle the body part, and an actuation unit, arranged to tighten the compression member to provide a compressive force to the body part. The actuation unit includes an active material actuator. There is also disclosed a system comprising such a device and methods for its therapeutic, cosmetic and non-therapeutic use and operation.

An improved rotary engine system has two stationary buffer seals located at the two ends of the minor axis of a rotor housing that divide the rotor housing into two separate volumes. A first volume is an intake and compression volume and a second volume downstream to the first volume is an expansion and exhaust volume. A rotating combustion chamber flow control device (CCFC) is synchronized with a rotor, for receiving compressed fluid from the first volume, for receiving fuel injected by a fuel injector located within a corresponding CCFC, for igniting and burning an air-fuel mixture, to allow combustion products to expand in the second volume, and for transferring the combustion products to the second volume. In one embodiment, the CCFC is synchronized with two longitudinal shafts fitted at centers of first and second housings, respectively, in each of which are located a pair of side by side rotors.

Disclosed are a propelling method and a device for vessels and other navigating machinery in water. The method based on the hydraulic transmission principle includes transforming mechanical energy output by a plurality of main engines (more than two) into pressure energy of hydraulic oil, after power integration and distribution, respectively driving a propeller screw, a steering engine (which can be canceled after employing a pod revolving device), a lateral-thrust unit and other auxiliary devices, using a shaft generator to replace a ship auxiliary engine, adjusting revolution rate and steering of the propeller screw by controlling a pump and the main engines, realizing coordinated working of other auxiliary devices of the propeller screw, the steering engine, the lateral-thrust unit and the like and various working modes of the main propelling system, simultaneously recycling inertia energy produced by the propeller screw and vessel in the brake process and the like. The propelling method has the advantages of flexible engine room arrangement, large power-to-weight ratio of devices, high safety and reliability, high maneuverability, good work condition engaging characteristic, strong overload protection capacity, inertia energy recycle and the like.

The invention provides a low noise fast response permanent magnet direct current brushless motor for controlling constant air volume, which comprises a shell, a stator and a rotor in the shell, wherein the stator comprises a stator iron core and a stator winding which are fixed on the inner wall of the shell, the rotor comprises a main shaft and a rotor iron core, the external circumferential direction of the rotor iron core is evenly fixed with rotor magnetic poles which comprise radial magnetized magnetic steel and tangential magnetized magnetic steel, the radial magnetized magnetic steel is a main magnetic pole, and the tangential magnetized magnetic steel which is arranged between adjacent main magnetic poles is a side magnetic pole. Or, the inner circumferential direction of the rotor iron core is evenly embedded with built-in radial magnetized rectangular strip magnetic steel which is the main magnetic pole, and the tangential magnetized magnetic steel which is arranged between adjacent main magnetic poles is the side magnetic pole. The low noise fast response permanent magnet direct current brushless motor gathers magnetic through two ways of radial and tangential direction, thereby observably increasing the air gap flux density, greatly reducing the mechanical time constant, increasing fast response, controlling the constant air volume in a high performance, which leads a motor to steadily operate in high efficiency, saving energy, low fluctuation, low noise, frequent starting and rapid response, and the low noise fast response permanent magnet direct current brushless motor can achieve the miniaturization and lightening of the motor.

The present invention relates to a piston type gas turbine engine. It is characterized by that it adopts piston instead of air compressor of traditional gas turbine engine, the crankshaft is connected with piston connecting rod, the piston connecting rod is connected with piston, said piston can be reciprocally moved in the cylinder body, on lower end wall of said cylinder body an air inlet valve is set, the tail end of said cylinder body is equipped with an air supply valve, in the compressed air channel a throttle valve is set, the conical gear on the crankshaft is meshed with the conical gear in the upper end of turbine rotating shaft, and the lower end of said turbine, rotating shaft is connected with turbine.

The iron core of stator and rotator is made of pressed stack silicon steel sheet. The three-phase machine has the structure of 6K / 4K, namely the teeth numbers of stator is 6K, and the teeth numbers of rotator is 4K. K=1, 2, 3..... The iron core of stator is composed of 2K same iron core components, each component has three teeth, there are total amount of 6K teeth distributing evenly along the circle. The width at tooth tip is n / 6K radian. The rotator has 4K teeth and the width at tooth tip is also 4 / 6K radian or a little bit more than n / 6K. The tooth of rotate can be straight tooth or skewed tooth.

A double-impact integral hydraulic tapping machine comprises a borer assembly. A front support device, an impact device and a rotary device are sequentially arranged on the outer portion of the borer assembly from front to back, a backstop assembly is arranged at the rear end of the borer assembly, a rotary joint assembly is arranged at the outer end of the backstop assembly, the borer assembly comprises a rapping rod, a drill stem connecting sleeve is connected to the front end of the rapping rod, and the impact device comprises an impact functional module and a reversing control functional module. The double-impact integral hydraulic tapping machine has the advantages that the double-impact integral hydraulic tapping machine is adaptable to hard iron notches, is high in reverse impact output power and prevents the problem of stem withdrawal; a forward impact device and a reverse impact device are integrated, reverse impact operation can be carried out by retreating a trolley when the drill stem is required to be withdrawn, the stem withdrawal time is shortened, and misoperation is avoided; the double-impact integral hydraulic tapping machine is in a modular design, and is high in maintainability and low in failure rate; and the double-impact integral hydraulic tapping machine is high in protection performance, and the service life of equipment is long.

The invention discloses a magnetic suspension impeller siphon wind driven generator. A magnetic suspension impeller, an inner supporting column and a siphon pipe are coaxially installed; the circumference of the outer surface of the inner supporting column is provided with a plurality of power generation coil modules, and each power generation coil module is composed of a U-shaped magnetizer and acoil; a supporting magnetic ring is fixedly installed on the circumference of the outer surface of the inner supporting column; the magnetic suspension impeller is an annular impeller and perpendicular to the ground and is coaxially installed in the siphon pipe; the magnetic suspension impeller is composed of an inner wheel sleeve, an outer wheel sleeve, blades, magnetic poles and a large magnetic ring; the two ends of each blade are fixedly connected with the outer circle surface of the inner wheel sleeve and the inner circle surface of the outer wheel sleeve correspondingly; the multiple magnetic poles of which the quantity is the same as that of the coils are fixedly installed on the circumference of the inner surface of the inner wheel sleeve; the large magnetic ring is installed on the circumference of the lower port of the inner wheel sleeve; and the opposite annular surfaces of the large magnetic ring and a supporting magnetic ring are the same in magnetic polarity. The magnetic suspension impeller siphon wind driven generator generates power in that mode that siphon airflow in the siphon pipe pushes the magnetic suspension impeller and is not influenced by natural wind force, thus, all-weather power generation can be achieved, and the power generation efficiency is improved.

The invention relates to an inside engaged gear pump or gear motor device with a multilayer structure. The device comprises an inner rotor, N layers of double-faced toothed ring sleeves, an outer rotor and a pump body, wherein N is a positive integer more than or equal to 1; the inner rotor, the double-faced toothed ring sleeves and the outer rotor are sequentially arranged in the pump body from inside to outside; the tooth faces of the inner rotor, the N layers of double-faced toothed ring sleeves and the outer rotor are in a mutual contact engaged state; at least two sealed accommodation cavities are formed between adjacent elements of the inner rotor, the N layers of double-faced toothed ring sleeves and the outer rotor; and rotating axes of the inner rotor, the N layers of double-faced toothed ring sleeves and the outer rotor are positioned in the same plane, and are not overlapped. The double-faced toothed ring sleeves are additionally arranged between the inner rotor and the outer rotor, so that a volume between the rotor can be multiplied under the condition of no increase of widths of the rotors; and by the elastic compensation function of the double-faced toothed ring sleeves, a requirement on the machining accuracy of the inner and outer rotors of the device can also be lowered, so that machining difficulty and maintenance cost are lowered.

The invention provides a manufacturing technology of single-airway macromolecular soft fingers. The single-airway macromolecular soft fingers are formed by compositing PDMS (polydimethylsiloxane) rubber and Ecoflex 00-30 rubber, wherein an air cavity is formed between the PDMS rubber layer and the Ecoflex 00-30 layer. The manufacturing technology comprises the following steps: pouring one rubber into a mold cavity of a finger die, and curing to form a lower rubber layer; positioning a cylindrical die used for forming the air cavity on the cured rubber layer; pouring another rubber into the die, and curing to form an upper rubber layer; and then removing the cylindrical die to obtain the macromolecular soft fingers. The manufacturing technology of the single-airway macromolecular soft fingers is high in changeable-environment compliance, and high in safety; the single-airway macromolecular soft fingers are formed by compositing two types of rubber; the rubber, which is light in mass and high in flexibility, is used as the basic material, so that the single-airway macromolecular soft fingers are applicable to the man-machine interaction field.

The invention discloses a hydraulic system of a coal mining machine, which mainly comprises an oil tank, a variable pump, a variable mechanism, a four-way reversing valve, a hydraulic executing element, an auxiliary gear pump, three-way reversing valves, an overflow valve and a cooler, wherein one end of the variable pump is connected with the oil tank by a pipeline through an oil absorbing and filtering device. The hydraulic system of the coal mining machine provided by the invention has good power adaptability, and the output of the pump is dependent on the load requirement of the machine, so that power waste is effectively reduced. Additionally, with the integrated multi-way valve, the improvement of output pressure of the system is further facilitated, power weight ratio can be further improved, the electro-hydraulic proportion is controlled, and the control accuracy for an open-pit coal mining machine is further improved. Two three-way reversing valves are mounted in the hydraulic system, so that temperature of the oil can be adjusted with the variation of seasons, and the oil is prevented from being overheated.

The invention discloses a single-phase linear-motion inserting sheet type electromagnet which comprises an armature assembly, a stator assembly, a shell, a front end cover and a rear end cover, wherein the stator assembly comprises a stator left retainer, a stator left inserting sheet, a stator right retainer, a stator right inserting sheet, a coil retaining frame, a control coil and a circular-ring-shaped permanent magnet. The armature assembly comprises three portions, namely a hollow cup type armature retainer, armature inserting sheets and a push rod, wherein a plurality of inserting slots which are evenly distributed are formed in the radial outer cylindrical surface of the hollow cup type armature retainer, the armature inserting sheets can be inserted into the inserting slots and are made of silicon steel materials. Each arm inserting sheet is in a flat strip shape, is formed in a cold stamping mode and is provided with three rectangular teeth at different intervals, and the widths of the three rectangular teeth are the same. The shell, the front end cover and the rear end cover restraint and fix the stator assembly in the axial direction, and the shell is connected with the front end cover and the rear end cover through bolts.

A turboprop engine comprises all structures of a propeller, axial-flow compressors, evaporative combustors, turbines, an exhaust nozzle and the like, and is characterized by further comprising by-pass pipes and internal exhaust valves, and external exhaust valves are mounted or are not mounted in pipes outside the engine and between air inlets and air outlets of the by-pass pipes; and when the engine is started for operation, the internal exhaust valves are opened, the supercharge ratios of the axial-flow compressors are increased and kept unchanged by means of the by-pass pipes and through opening and closing of the internal exhaust valves or the internal exhaust valves and the external exhaust valves, the increased supercharge ratios are not larger than the mechanical strength limit which can be borne by the axial-flow compressors and the turbines, the turbine inlet temperature is kept unchanged, that is, the supercharge ratios and a power weight ratio are increased, the oil consumption rate is reduced, however, the number of stages of the axial-flow compressors and the turbines is not increased, and the turbine inlet temperature is not increased.

The invention discloses a high-supercharged two-stroke direct injection engine and a ventilation method thereof. The engine comprises an air cylinder; a piston is arranged in the air cylinder; the piston is connected with a crankshaft through a connecting rod; the center of the top wall of the air cylinder is provided with an oil sprayer; the top wall of the air cylinder is also provided with an air inlet and an exhaust vent; the air inlet is provided with an inlet valve; the air inlet is communicated with an admission passage; the admission passage is provided with a high-pressure ratio supercharger; the exhaust vent is provided with an exhaust valve; and the exhaust vent is communicated with an exhaust passage. In a loop, according to the rotation angle of the crankshaft, the exhaust valve is opened before the piston reaches a bottom dead center for 45 DEG and is closed after the piston bypasses the bottom dead center for 60 DEG; the inlet valve is opened after the piston bypasses the bottom dead center for 15 DEG and is closed before the piston reaches a top dead center for 85 DEG; and the inlet valve is closed after the exhaust valve is closed. The engine disclosed by the invention has the advantages that the structure is compact; the manufacturing difficulty is reduced; air intake and exhaust are controllable; the power weight ratio is greatly improved; and moreover, fuel economy and emission level which approach to that of a four-stroke engine can be realized.

A turbine shaft engine comprises axial-flow compressors, evaporative combustors, a turbine, a free turbine, a drive shaft, an exhaust nozzle and the like, and is characterized by further comprising by-pass pipes and internal exhaust valves, and external exhaust valves are mounted or are not mounted in pipes outside the engine and between air inlets and air outlets of the by-pass pipes; and when the engine is started for operation, the internal exhaust valves are opened, the supercharge ratios of the axial-flow compressors are increased and kept unchanged by means of the by-pass pipes and through opening and closing of the internal exhaust valves or the internal exhaust valves and the external exhaust valves, the increased supercharge ratios are not larger than the mechanical strength limit which can be borne by the axial-flow compressors, the turbine and the free turbine, the turbine inlet temperature is kept unchanged, that is, the supercharge ratios and a power weight ratio are increased, the oil consumption rate is reduced, however, the number of stages of the axial-flow compressors and the turbines is not increased, and the turbine inlet temperature is not improved.

Disclosed are a propelling method and a device for vessels and other navigating machinery in water. The method based on the hydraulic transmission principle includes transforming mechanical energy output by a plurality of main engines (more than two) into pressure energy of hydraulic oil, after power integration and distribution, respectively driving a propeller screw, a steering engine (which can be canceled after employing a pod revolving device), a lateral-thrust unit and other auxiliary devices, using a shaft generator to replace a ship auxiliary engine, adjusting revolution rate and steering of the propeller screw by controlling a pump and the main engines, realizing coordinated working of other auxiliary devices of the propeller screw, the steering engine, the lateral-thrust unit and the like and various working modes of the main propelling system, simultaneously recycling inertia energy produced by the propeller screw and vessel in the brake process and the like. The propellingmethod has the advantages of flexible engine room arrangement, large power-to-weight ratio of devices, high safety and reliability, high maneuverability, good work condition engaging characteristic, strong overload protection capacity, inertia energy recycle and the like.

The invention relates to the technical field of unmanned aerial vehicles, and provides a petrol-electric hybrid vertical take-off and landing sweepforward fixed wing unmanned aerial vehicle. A fuselage assembly comprises a handpiece front cabin, a front fuselage and a rear fuselage which are sequentially connected from front to back, and at least one electric ducted fan engine is internally arranged in the handpiece front cabin; energy assembly and a load cabin are internally arranged in the rear fuselage, a propelling propeller assembly is arranged at the tail of the rear fuselage, and the propelling propeller assembly is used for proving front thrust to overcome aerodynamic resistance of the unmanned aerial vehicle during flying; and wing assemblies are installed on the two sides of therear fuselage in a sweepforward mode; an empennage assembly is installed on the tail segment of the rear fuselage; vertical lift force devices are of an electric fan mode, and the two vertical lift force devices are symmetrically installed on the left side and the right side of the middle fuselage. The petrol-electric hybrid vertical take-off and landing sweepforward fixed wing unmanned aerial vehicle has the characteristics of vertical take-off and landing and remote navigation, large lift force vertical take-off and efficient horizontal flight integration, vertical lift force system and fixed wing layout integrated design and rotary wing vertical lift force and fixed wing lift force integrated control are realized.

The invention discloses a high-power laser constant-current source circuit for space navigation, which comprises a plurality of Superboost constant-current driving power supply modules, which are connected in parallel and a plurality of high-voltage storage battery packs, the input end of each Superboost constant-current driving power supply module being correspondingly connected to the two ends of one high-voltage storage battery pack in parallel; and a plurality of laser load power supply pump modules, wherein the output end of each Superboost constant current driving power supply module is correspondingly connected with one laser load power supply pump module, and each Superboost constant-current driving power supply module is used for driving the corresponding laser load power supply pump module in a constant-current manner. The driving power supply has the characteristics of high stability, high power, high efficiency and high power density, and meets the performance requirements of the laser load for space navigation on the driving power supply.

A two-dimensional half-bridge electro-hydraulic proportional directional valve based on a push rod mid-mounted roller coupling comprises a two-way proportional electromagnet, the push rod mid-mounted roller coupling and a two-dimensional half-bridge electro-hydraulic proportional directional valve body which are sequentially arranged from left to right, and the two-dimensional half-bridge electro-hydraulic proportional directional valve body comprises a valve body, a valve sleeve and a valve element. The two-way proportional electromagnet is mounted at the left end of the valve body, the push rod mid-mounted roller coupling is mounted at the left end of the valve element, and the valve element is connected with the two-way proportional electromagnet through the push rod mid-mounted roller coupling. A two-dimensional hydraulic amplification mechanism with two degrees of freedom of the valve element is adopted, rotation of the valve element serves as a pilot level, axial movement of the valve element serves as a power level, the pilot level and the power level are integrated on the single valve element, the structure is simple, the machining cost is low, and the power-to-weight ratio is greatly increased.

The invention provides an integrated cross-flow lithium flow battery reactor, which includes a battery frame and an isolation window. The battery frame is a hollow cuboid inside, and the two sides A-A 1 There are several pairs of straight-through empty slots for accommodating the isolation windows, and the plurality of isolation windows are arranged and inserted into the straight-through empty slots in the order in which the current collector layers of the same polarity are placed relative to each other to form alternately spaced positive and negative reaction chambers. Cavity; at A‑A 1 There is a positive electrode runner groove between the two straight-through empty grooves forming the positive electrode reaction chamber, and the B-B 1 A negative electrode runner groove is arranged between the two straight-through empty grooves forming the negative electrode reaction chamber. The battery reactor adopts an integrated design, avoiding the use of locking force to seal and fix, and will not cause sealing hazards due to uneven force. At the same time, the weight of end plates and tie rods is saved, and the power-to-weight ratio of the battery reactor is relatively improved. , and the battery reactor is simple to manufacture and easy to assemble.

The invention discloses a ground mobile robot with inflatable car body comprising a car body, travel mechanisms, an electric and control module and a power module, and driving and transmission mechanisms; the quantity of the driving and transmission mechanisms are corresponded to that of the travel mechanisms; each driving and transmission mechanism is connected with a corresponding travel mechanism; the car body comprises an upper car body, a lower car body and a lower car body skeleton; the upper car body is connected with the lower car body and forms a closed air pocket carriage; an air tap is provided on the upper car body, the lower car body is fixed on the lower car body skeleton, wherein both the upper car body and the lower car body are made of light materials. The ground mobile robot with inflatable car body uses a light and hard inflatable car body as the car body force-bearing structure, then the robot reduces the car body weight of the ground mobile robot effectively, raises power weight ratio of the robot, and makes the robot have advantages of large load an rapid movement; meanwhile, because the tightness is good, the robot can further move in water, for possessing amphibious ability.

The invention relates to a rotary cylinder piston type engine. The whole engine consists of an upper part and a lower part, the upper part is a combustion system assembly which comprises upper supports, lower supports, an upper rotor component and a lower rotor component, and the lower part is a transmission system assembly which comprises an upper transmission cavity cover, a transmission cavity and a transmission component assembly; the upper rotor component and the lower rotor component respectively comprise a ventilating disc, two air cylinders and two pistons, which are fixed; the upper rotor component and the lower rotor component are alternately and forwardly rotated by the transmission component assembly, the ventilating disc is tightly connected with a valve disc of the upper supports or the lower supports to carry out ventilation, and thereby the four-stroke engine is formed.

The invention provides a two-dimensional half-bridge type electro-hydraulic proportional reversing valve based on a Halbach array bidirectional magnetic suspension shaft coupling. The two-dimensionalhalf-bridge type electro-hydraulic proportional reversing valve comprises a two-dimensional half-bridge type electro-hydraulic proportional reversing valve body, a proportional electromagnet and the Halbach array bidirectional magnetic suspension shaft coupling, wherein the two-dimensional half-bridge type electro-hydraulic proportional reversing valve body is a 2D valve composed of a valve core and a valve base body, the left end of the valve base body is provided with one bidirectional proportional electromagnet, the left end of the valve core is provided with one Halbach array bidirectionalmagnetic suspension shaft coupling, the valve core is connected with the bidirectional proportional electromagnet through the Halbach array bidirectional magnetic suspension shaft coupling, the poleshoe surfaces of yoke irons are provided with Halbach array magnetic sheets in a pasted manner, the wing surfaces of the upper and lower two sides of an oblique wing promoter corresponding to the poleshoe surfaces of yoke irons are provided with the Halbach array magnetic sheets in a pasted manner, so that magnetic repulsion force is formed, and the magnetic repulsion force makes the oblique wingpromoter be capable of being 'suspended' between the yoke irons purely depending on magnetic force without any help of mechanical structures, a left-end high-pressure round hole in the left end of the valve core, a tight-end high-pressure round hole, a right-end low-pressure round hole and a feeling channel form a four-way rotary valve and form a hydraulic resistance half bridge by being connected in series, and the pressure of a left sensitive cavity and a right sensitive cavity at the two ends of the valve core is controlled.

The invention discloses a high-power medium-speed generator. The generator comprises a motor body, and the motor body comprises a rotating shaft, a front bearing, a front end cover, a fan, a base, a stator winding, a stator core, a rotor core with a winding, a box body combination group, an exciter stator, an exciter rotor, a rear end cover and a rear bearing; and the base is of a square structure formed by welding an upper cover plate, ribs, side cover plates, a front end plate, an air deflector, a supporting plate, a rear end plate, a lower cover plate, an inclined cover plate and a bottom foot plate, the front end cover is formed by connecting a front end cover blank, a front bearing sleeve and an insulating pad through bolts and then machining, and the front end cover has an insulating function and can effectively prevent shaft current. The power of the generator body is 1300-1800 kW, the number of poles is eight, the rotating speed is 750 r / min, the power of the generator is large, the rotating speed is low, the load capacity is high, the size is small, the weight is light, and the power-to-weight ratio is high.

A multifunctional intelligent sensing magic cube structure comprises a magic cube bracket, a sensing assembly, a central control assembly and a power supply unit, wherein the sensing assemblies, the central control assembly and the power supply units are arranged on the magic cube bracket; the magic cube bracket comprises a cubic body, a first accommodating cavity is formed in the center of each face of the body, a plurality of second accommodating cavities are formed in the peripheral side of each first accommodating cavity, and the adjacent second accommodating cavities in the adjacent facesof the body are communicated with one another; the central control assembly is arranged in the first accommodating cavity, the sensing assemblies are arranged in the second accommodating cavities, and the power supply units are arranged at a cavity opening of the first accommodating cavity respectively. The multifunctional intelligent sensing magic cube structure can be carried by personnel or thrown to a preset place by means of an unmanned aerial vehicle, and is densely deployed in a related combat domain in a large range, so that low efficiency and danger of manual layout are avoided, andlarge-range reconnaissance and monitoring of the environment can be quickly realized.

The invention discloses a starting power generation system for an electric automobile, which comprises a double salient pole starting power generator, a starting power generation controller and controller working power; the starting power generation controller comprises a bidirectional power conversion circuit, an exciting current detection unit, an output current detection unit, an output voltage detection unit, a position rotation speed detection unit, an armature current detection unit, an exciting main circuit and a digital signal processor, wherein the exciting main circuit includes an exciting relay, a rectification filter unit and a chopper circuit which are connected in series in turn; and the digital signal processor is connected with the exciting current detection unit, the output current detection unit, the output voltage detection unit, the armature current detection unit, the position rotation speed detection unit, and the control ends of the bidirectional power conversion circuit, the exciting relay and the rectification filter unit by signals respectively. The invention also discloses an electric automobile and a control method thereof. Compared with the prior art, the starting power generation system is simple in structure, low in cost and flexible to control.

The invention provides a direct acting two-way inserting sheet type electromagnet which comprises a stator part, an armature part, a housing and a front / back end cover, wherein the stator part is arranged outside the armature part, and the stator part comprises a first stator retainer, a second stator retainer, a third stator retainer, a fourth stator retainer, a stator silicon steel sheet, a first coil retainer, a second coil retainer, a first control coil, a second control coil, a permanent magnet and a housing; the shapes of the four stator retainers are as the same as one another, the four stator retainers are hollow semi-cylinder bodies, and inserting grooves evenly distributed along the radial direction are arranged on the outer peripheral surface of a cup body; and the armature part comprises an armature retainer, an armature inserting sheet and a push rod, the armature retainer is formed by high-intensity enhanced nylon material in an injection molding way, and rectangular inserting grooves which have a certain depth respectively and evenly distributed are arranged on the outer peripheral surface of the armature retainer.