114results about How to "Reduce starting torque" patented technology

The invention belongs to the permanent magnet synchronous generator technology field, and particularly relates to a method for weakening cogging torque of a permanent magnet synchronous generator. The method for weakening the cogging torque of the permanent magnet synchronous generator includes: firstly, optimizing the shape of a permanent magnet motor tooth so as to reduce the cogging torque; then, optimizing a pole arc coefficient; next, using a magnet pole shifting method to reduce a harmonic component of the cogging torque so as to achieve the purpose of reducing the cogging torque; finally, combining the above three steps so as to minimize the cogging torque, building a finite element model of the permanent magnet synchronous generator, and performing analysis and finite element verification on a provided cogging torque suppression method. The method for weakening the cogging torque of the permanent magnet synchronous generator has the advantages of reducing the cogging torque of the permanent magnet synchronous generator on the premise of slightly influencing other properties of the permanent magnet synchronous generator by changing the shape of the tooth and using an optimal pole arc coefficient method and a magnetic pole shifting method in combination, and then reducing starting resistance torque of a direct drive permanent magnet synchronous wind generator, and improves usage rate of wind energy.

The invention relates to an electromotor energy storage braking system and a control method, and belongs to an energy storage braking system and a control method used for storing and recycling energy generated in the process of electromotor braking. The electromotor energy storage braking system and the control method mainly solve the technical problems that an existing energy storage device is small in stored energy, large in interference to a power grid, inconvenient to use and the like. The electromotor energy storage braking system comprises a main electromotor, a rectifier, a main inverter, a direct current bus, a filter capacitor, a control computer, a first pulse width signal generator and a first driving module, and further comprises a motor rotary speed controller, an electromotor or a generator, a hydraulic pump or a motor, a two-position three-way control valve, a hydraulic energy accumulator, a safety valve, a pressure sensor, a rotary speed sensor, a hydraulic oil tank, a voltage sensor, a second pulse width signal generator and a second driving module. The electromotor energy storage braking system and the control method have the advantages of achieving active control to the process of electromotor braking, saving energy, reducing consumption, achieving energy saving and emission reduction and the like.

The invention discloses a magnetic-suspension vertical shaft self-conditioned pitch aerogenerator which comprises a magnetic-suspension aerogenerator. A generator shaft of the magnetic-suspension aerogenerator and an impeller shaft of an impeller are integrally made. The generator shaft on which a rotor of the generator is arranged is penetrated into a motor casing on which a generator unit stator is arranged, and an axial magnetic suspension device and a radial magnetic suspension device are arranged on the generator shaft and in the motor casing for magnetic suspension positioning; the impeller shaft is arranged in a wheel hub fixedly and a plurality of blades of the impeller are connected with the wheel hub through the self-conditioned pitch device of the vertical shaft. The aerogenerator has advantages of simple structure and convenient use, effectively improves the whole performance of the aerogenerator, enhances efficiency, has energy saving, consumption reduction and environmental protection and is easy for popularization, etc.

The invention relates to an anti-hardening, anti-freeze and anti-locking method for a silo buried revolving spiral, comprising the following steps: mounting a spiral longitudinal whole-course subresonance loosening and activating unit at a bearing pedestal of the silo buried revolving spiral, connecting relevant devices flexibly, mounting a circulating spray system at non-working face of spiral vanes around a spiral shaft, introducing water, thinners, hot steam and inert gases, restricting revolution direction of buried revolving spiral and adopting special switch technology. By using the anti-hardening, anti-freeze and anti-locking method for the silo buried revolving spiral and supporting devices, the buried revolving spiral is free of unfavorable influence caused by level height, material characteristics and environmental temperature, and system operation reliability can be improved due to normal work of an anti-hardening, anti-freeze and anti-locking support device. The method is suitable for mounting in flat-bottom bulk material silos with large diameter, especially for unloading of high-viscosity big-chunk high-moisture complicated-characteristic material in severe cold districts.

The invention belongs to the technical field of shield tunnel construction, particularly relates to an escape device of a bentonite improving shield tunneling machine and a construction method. The escape device comprises an even number of jet grouting piles, wherein the jet grouting piles are three-pipe jet grouting piles, the pile forming diameter is 800-1000 mm, the specific number of the jet grouting piles is determined according to soil layer parameters and the cutterhead diameter of the shield tunneling machine, the jet grouting piles are located at the positions 400-500 mm away from the front of a cutterhead of the shield tunneling machine, jet grouting pile slurry is specially-prepared bentonite slurry, the mass ratio of bentonite to water to CMC to soda ash is 200 to 900 to 1 to 2, and the stratum which the structures of the jet grouting piles are applicable to is a dense sand layer. The construction method comprises the three steps: first step, the positions of the jet grouting piles are arranged; second step, the jet grouting pile slurry is prepared; third step, the bentonite slurry is rotary jet grouting for pile forming. The construction steps are simple, the escape problem of the shield tunneling machine in the dense sand layer can be effectively and quickly solved, a construction period is short, the construction cost is low, and good economic benefits are obtained.

The invention provides a magnetic suspension wind power generator, comprising impeller, shaft, motor and bearings, where the impeller is arranged at one end of the shaft, the motor is arranged at the other end of the shaft, and one or two sides of the motor are equipped with bearings, and it is characterized in that: one or two sides of the bearing are equipped with magnetic suspension devices, which comprise one or one group of magnetic or magnetic-conducting rotators fixed on the shaft and magnetic stator device arranged outside the rotators, where the magnetic stator device comprises stator magnet which makes a height difference from the rotator and keeps an axial gap from the rotor. And the invention has features of simple, reasonable and compact structure, low cost, maintenance-free, reducing the starting wind speed of the wind power generator and able to effectively raise the output power of the power generator.

The invention provides a disk type permanent magnet wind-driven generator relating to a wind-driven generator and at least comprising a shell, a stator, rotors, a generator shaft and a bearing, wherein the generator shaft is arranged at a shaft axis position of the shell, two ends of the generator shaft are respectively spanned on the shell through a bearing frame, one end of the generator shaft extends out of the shell and the other end is arranged in the shell; the stator consists of stator coil brackets and stator coils, the stator coil brackets have distributed structures in radial uniform distribution, and the stator is fixed on the shell; the rotors are radially fixed on the generator shaft and arranged opposite to the stator, and an air gap is remained between the stator and each rotor. The disk type permanent magnet wind-driven generator is characterized in that the stator coil brackets are distributed in two layers and adopt a non-cross overlapped way; the stator coils in two groups are respectively wound on the surfaces of the two layers of the stator coil brackets; and the two rotors are respectively arranged at two sides of the stator. The invention has the advantages of no frication resistance, no noise, sufficient utilization of magnetic fields, small starting wind power, large generated energy and simple structure.

The invention discloses a hydraulic filling type central air-conditioning unit and belongs to the technical field of central air-conditioning. The hydraulic filling type central air-conditioning unit comprises a compressor, a condenser, an expansion valve, an evaporator and a control unit for controlling a machine unit to run and further comprises a bypass pipe enabling a high-pressure refrigerant in the condenser to be led into the evaporator. The bypass pipe is provided with a solenoid valve controlling on-off of the bypass pipe, the evaporator is provided with a temperature sensor for detecting outflow water temperature, and the temperature sensor and the solenoid valve are electrically connected with the control unit. When the temperature of outflow water of the evaporator is larger than a set value, the compressor and the expansion valve are turned off, the high-pressure refrigerant is led into the evaporator by opening the bypass pipe, evaporating temperature of the refrigerant is improved, the speed of lowering the water temperature is slowed down, water in the evaporator is kept flowing continuously, the compressor and the expansion valve are restarted until the water in the evaporator reaches a certain temperature, and accordingly freezing of the evaporator is avoided.

The invention provides an elastic bone screw. At the position where an elastic rod and a limiting sleeve are fixedly connected, ribs distributed at intervals are arranged at the circumstantial direction, and the ribs protrude outward toward the direction close to the limiting sleeve; an inserting groove of the limiting sleeve forms concave grooves in the position corresponding to the ribs; when the elastic rod is fixedly connected to the limiting sleeve, the ribs and the grooves mesh in the rotating direction of the elastic rod to form a cooperatively limited helix resistance structure, and thus when the elastic rod rotates, no relative motion is conducted between the elastic rod and the limiting sleeve in the rotating direction; the elastic rod is inserted into the part of the limiting sleeve, and the tail end face of the part and the tail end face of the limiting sleeve are subjected to visual welding fixing. Through micro motion of the elastic bone screw, relative motion occurs between a locking plate and a connected bone in the direction parallel with the initial installing position, and healing of the bone is better promoted. Moreover, due to the use of the visual welding, the limiting sleeve and the elastic rod are welded, and the problems in the traditional blind welding process of pseudo soldering and solder skips can be effectively avoided.

The invention relates to a method for controlling an engine to start through a starting and electricity generating device. The method includes the following steps that (A) whether the rotating speed is zero or not after a power source is turned on is judged, and the next step is executed if yes; (B) whether a starting signal of the engine is received or not is judged, and the next step is executed if yes; (C) a motor is directly driven to rotate forwards, whether the rotating speed of the motor is larger than a first preset rotating speed or not is judged, and the next step is executed if yes; (D) the motor is stopped from rotating forwards, and if the rotating speed of the motor is not larger than the first preset rotating speed, the step (C1) that the motor is stopped from rotating forwards, instead, a crankshaft is driven to rotate reversely by an angle or for a certain period of time, and then the step (C) is executed repeatedly; and (E) whether the rotating speed of the motor is smaller than a second preset rotating speed or not is judged, if yes, the engine is in a flameout state, and if not, the engine is still in an electricity generating state. Thus, by means of the same electromechanical structure integrating starting and electricity generating, the starting time of the engine can be shortened effectively.

The invention discloses a disk-type magnetic suspension outer rotor type vertical shaft wind-driven generator unit which combines characteristics of Japanese coreless disk-type generators, a plurality of Chinese vertical shaft disk-type inner rotor generators and repulsion-type magnetic suspension vertical shaft disk-type generators and integrated and innovated on the basis of the characteristics. The disk-type magnetic suspension outer rotor type vertical shaft wind-driven generator unit is innovated in that the disk-type magnetic suspension outer rotor type vertical shaft wind-driven generator unit is a suction-type magnetic suspension vertical shaft wind-driven generator unit which is material-saving and low in cost compared with the repulsion type. No extra power supplies and controllers are needed to achieve self-adaptive balance, and accordingly the disk-type magnetic suspension outer rotor type vertical shaft wind-driven generator unit is high in cost performance and promising in market prospect.

The invention discloses a driving device of a rope sawing machine. The driving device comprises a bearing seat, a gear motor, a driving wheel and a driving axle which are mounted on a fixing frame, and a bearing is arranged in the bearing seat. One end of the driving axle is mounted with the bearing in a matched manner, while the other end of the same is fixedly connected with the driving wheel through a driving wheel hole sleeve and a sleeve stop plate in a matched manner. A flange end face of the gear motor is connected with the bearing seat in a positioning manner, and a shaft of the gear motor is connected with an end hole of the driving axle in a matched manner. A Tekang rotating plug playing a role in underwater sealing is arranged between one end of the bearing seat and a shaft end cap. An O-ring playing a role in underwater sealing is arranged between the other end of the bearing seat and the flange end face of the gear motor. The driving device is simple in structure, easy to mount, reliable in operation, large in bearable sealing pressure, applicable to underwater, and accordant to beaded rope driving requirements of the rope sawing machine.

The invention provides a permanent magnet wind motor with a combinatorial stator structure which belongs to permanent magnet wind motor field, adopting the technical proposal that: I-shaped punching sheets are laminated to form magnetic poles, a punching sheet bulge and a punching sheet groove are arranged at both sides of a yoke part of the punching sheet, the punching sheet bulge and the punching sheet groove are laminated respectively to form a magnetic pole bulge and a magnetic pole groove when the punching sheets are laminated as magnetic poles, coils are reeled around the magnetic poles to form stator windings, two adjacent magnetic poles are jointed and fixedly welded through the magnetic bulges and the magnetic grooves, the magnetic poles joint a hollow cylinder-shaped stator around the circumference, the pole groove ratio of the stator and the rotor is 24 : 22 or 24n : 22n, n is a natural number, the rotor is embedded in the central part of the stator, an axis is inserted into a wheel hub of the rotor, the axis is in connection with a bearing cone, a bearing cup is in connection with an end cover, the bearing drives the axis to roll and accordingly the axis drives the rotor to roll.

The invention discloses a constant pressure full-balanced type floating side plate, the back of which is separated into a high pressure side and a low pressure side by a sealing ring groove. The floating side plate is characterized in that the surface of the high pressure side at the back of the side plate is provided with a pressure equalizing groove; a pressure guide groove which is used for leading high pressure oil at the back of the side plate into a low pressure area of a gear oil pump and is communicated with the pressure equalizing groove is arranged at a low pressure area of the circumference surface of the side plate along the axial direction; the periphery outside the front of the side plate is a right-angle form without chamfer angle. The invention can effectively improve the performance and the reliability of the gear oil pump and prolong the service life thereof.

The invention discloses a wheeled vehicle self-adaptive load-bearing and driving device and a control method thereof. The wheeled vehicle self-adaptive load-bearing and driving device comprises a vehicle frame, an adjustable load-bearing device, an auxiliary load-bearing device and a load-bearing and driving control system, wherein the auxiliary load-bearing device comprises a first shock-reduction universal foot wheel, a second shock-reduction universal foot wheel, a first shock-reduction directional foot wheel and a second shock-reduction directional foot wheel, and the first shock-reduction universal foot wheel, the second shock-reduction universal foot wheel, the first shock-reduction directional foot wheel and the second shock-reduction directional foot wheel are arranged on four corners of the vehicle frame in equal height. The adjustable load-bearing device is mounted on the vehicle frame and located in the gravity center of a vehicle. By means of the wheeled vehicle self-adaptive load-bearing and driving device, under the same whole-vehicle load condition, requirements on driving force are lowered, motor power and battery capacity are reduced, energy is saved, and the environment is protected.

The invention discloses a control method for reducing engine starting torsion. First, a flameout signal is received, and the engine rotating speed and the crank shaft angle are detected, and then whether the engine rotating speed is lower than a rotating speed threshold is judged. If the engine rotating speed is lower than the rotating speed threshold, whether the crank shaft angle is equal to angle threshold value is further judged. If the crank shaft angle is equal to the angle threshold value, an integrated type starting generator is controlled to execute an inversion mode so as to apply resistance force on an engine until the engine rotating speed is lower than or equal to critical value, and the engine is made to stop. Thus, the engine can stop in the non-compressed stroke, and when the engine is started again, torsion needed by starting the engine can be reduced.

The invention discloses a bidirectional gear motor, which comprises a front cover, a shell, a driving gear, a driving gear shaft, a driven gear, a driven gear shaft and a side plate, wherein the shell comprises a groove-type cavity which is formed with an opening on left side; the driving gear, the driving gear shaft, the driven gear, the driven gear shaft and the side plate are arranged in the shell; the front cover is fixedly arranged on the left end face of the shell, and is used for sealing the opening on the left side of the groove-type cavity; the left end of the driving gear shaft runs through the front cover and extends out of the left end of the front cover; a stepped inner cavity is formed on the front cover, and the driving gear shaft runs through from the stepped inner cavity; a bearing cavity is formed on a left end cavity of the stepped inner cavity, and a sealing cavity is formed on a right end cavity of the stepped inner cavity; a bearing is arranged in the bearing cavity; an oil seal is arranged in the sealing cavity; and both the bearing and the oil seal are arranged on the driving gear shaft in a sleeved mode. The bidirectional gear motor disclosed by the invention has the advantages of compact structure, high working pressure, low noise, good high-temperature starting performance, long service life, wide application scope and the like.

The invention relates to a lifting device which is suitable for being used for lifting of a traveling crane, a gantry crane, a hoist and the like. The lifting device comprises a winding drum which is driven by a motor, a fixed pulley assembly close to the winding drum on the upper portion of the lifting device and a movable pulley assembly on the lower portion of the lifting device. The fixed pulley assembly is composed of two fixed pulley groups, and the axial directions of the fixed pulley groups are perpendicular to the axial direction of the winding drum. The movable pulley assembly is composed of two movable pulley groups, and the axial directions of the two movable pulley groups are in a V shape. The lifting device is further provided with a lifting rope. After the lifting rope crosses the two fixed pulleys on the two fixed pulley groups, two ends of the lifting rope are respectively downward wound sequentially between the movable pulley groups and the fixed pulley groups, and then, the lifting rope is wound evenly on the winding drum upward on the movable pulley groups and eventually fixedly arranged at the left end and the right end of the winding drum. The lifting device is small in appearance and size, simple in structure and light in weight.

The invention discloses a voltage-reducing and electricity-saving controller of a motor, comprising a power supply circuit, a microprocessor circuit and a power factor angle acquisition circuit, wherein the power supply circuit is connected with the microprocessor circuit; the controller also comprises a current acquisition circuit, a synchronous information acquisition circuit, a silicon-controlled drive circuit, a silicon-controlled circuit and a control signal input circuit which are respectively connected with the microprocessor circuit, wherein the silicon-controlled circuit comprises a first silicon-controlled group, a second silicon-controlled group and a third silicon-controlled group; each silicon-controlled group comprises two pieces of one-way controlled silicon which are reversely connected in parallel; one end of each group of three silicon-controlled groups is the input end of the controller and the other end is the output end of the controller; and the silicon-controlled drive circuit comprises a first drive circuit, a second drive circuit and a third drive circuit which are connected with the trigger ends of the first, the second and the third silicon-controlled groups in sequence. The invention has the advantages of favorable real-time property, high accuracy and commonality.

The invention relates to a pressure-carrying sealing valve seat which comprises a valve seat body arranged in a valve body and a ball body. The valve seat body is provided with a hole. An opening of the hole and the ball body are in sealing connection through a sealing gasket. The valve seat body is axially arranged in a valve cavity of the valve body in a sliding manner. An annular boss is arranged on the periphery of the valve seat body. A first cavity body and a second cavity body are formed in the two sides of the annular boss. A first guiding hole communicating with the first cavity body and a second guiding hole communicating with the second cavity body are formed in the valve body. A piston structure is adopted in the valve seat body and supplies pressure to the two ends of the valve seat body, the valve seat body can slide relative to the ball body, and the sealing specific pressure needed during zero leakage can be achieved during closing; and leakage does not exist on a valve, and the starting torque needed during opening of the valve can be lowered during valve opening.

The invention discloses a laser ranging device, comprising a machine body and an inner optical system assembly, wherein the inner optical system assembly comprises an inner optical system assembly base, a micro motor, a cylindrical gear, a sector gear, a movable reflector and a torsion spring for locking the reflector; the movable reflector is positioned in the cavity of the inner optical system assembly base and is provided with a reflector rotating shaft at the root; the end of the reflector rotating shaft is provided with the sector gear; the sector gear is meshed with the cylindrical gear with clearance; the cylindrical gear is installed on the micro motor shaft; the micro motor is installed in a motor installation groove of the inner optical system assembly base; the cross section of the motor installation groove is slightly bigger than the 180-degree semicircle; the front end of the reflector rotating shaft is provided with a reflector locking convex body; the front end face of the inner optical system assembly base is provided with a torsion spring installation column and a torsion spring tension pin which are parallel with the reflector rotating shaft; the torsion spring is sleeved on the torsion spring installation column; and two spring plates of the torsion spring are respectively pressed on the torsion spring tension pin and the reflector locking convex body. The laser ranging device has simple structure and accurate test results and is reliable in operation.

The invention relates to a method for improving low-speed performance of a multi-cylinder engine. The method comprises a process of keeping an engine valve open in constant by using a solid-chained mechanism. In the first predetermined engine speed, a working piston of the solid-chained mechanism is placed on the operating position, forming the mechanical link with the engine valve, keeping the opened engine valve from closing; and in the first predetermined engine speed or the lower engine speed including zero, keeping the engine valve open in constant. Before the engine start and during the start, the working piston of the solid-chained mechanism keeps the engine valve open in constant sequentially, until the engine speed is increased from zero to the second predetermined engine speed, the working piston is switched from the operating position to the non-operating position, and cancelling the effect on the engine valve. The method uses the novel method and mechanism, and is capable of keeping an inlet valve or an exhaust valve of the engine open in constant, improving the parking, starting and idling performance of the engine, and reducing the fuel consumption and discharge of the engine.

The invention relates to a non-groove modular wind generator, which comprises stator and rotator. Wherein, the middle of stator is fixed on the middle axle of base; the middle axle is sheathed with one or several groups of iron cores and windings; the windings are radial winded on the hollow I-shaped winding support; the iron core clamped on the winding support is formed by two silicon steel plate in J-shape whose inner sides are connected and outer sides are alternated parallel; the rotator is formed by frame and several magnetic steels on the frame; the output of winding is axial outward along middle axle. The invention uses the theory of transformer based on former generator. Compared with traditional generator, it has simple structure and low noise, etc.

A cutter head assembly for a fiber roving chopper includes a cylindrical blade cartridge extending axially between a cartridge first end and a cartridge second end. The cylindrical blade cartridge includes a first surface that extends between the cartridge first and second ends and is angled with respect to a central axis of the cylindrical blade cartridge. A second surface extends between the cartridge first and second ends parallel to the first surface and the second surface faces the first surface. A blade body extends between the cartridge first end and the cartridge second end and is disposed between the first surface and the second surface.

The invention discloses a small torque electric ball valve, which comprises a valve body (1), a ball valve core (2), a sealing ring (3), an O-ring (4), a valve stem (5) and an electric driver (6). In the present invention, an elastic and silicon rubber O-ring is arranged between the sealing ring and the valve body. When the electric ball valve is started, a shearing and sliding tendency occurs between the ball valve core and the sealing ring, and the elasticity of the O-ring is used to make the sealing ring produce Elastic retreat, reducing and overcoming the static adhesion between the ball valve core and the sealing ring, using a small torque to make the static friction between the ball valve core and the sealing ring transition to dynamic friction, thereby reducing the technical scheme of the starting torque, making the electric ball valve , to achieve the purpose of reducing the starting torque and turning torque.

The invention discloses a radial magnetic field coreless permanent-magnet wind driven generator, comprising a rotor inside cylinder, a rotor outside cylinder and a stator cylinder which are arranged coaxially; wherein, the rotor inside cylinder and the rotor outside cylinder are connected into a whole and are connected with a main shaft by a bearing, and the opening directions of the rotor inside cylinder and the rotor outside cylinder are consistent, the opening direction of the stator cylinder is opposite to that of a rotor cylinder, and the wall of the stator cylinder is arranged between the rotor inside cylinder and the rotor outside cylinder, inner magnetic steel is uniformly distributed at the periphery on the wall of the rotor inside cylinder, outer magnetic steel is uniformly distributed at the periphery on the wall of the rotor outer cylinder, the polarity of the uniformly distributed inner magnetic steel and the outer magnetic steel is changed in an alternating way, and the polarity of the opposite inner magnetic steel and the outer magnetic steel is opposite, and wire coils are uniformly distributed on the wall of the stator cylinder. In the invention, starting torque is effectively reduced, so as to solve the problem that the dynamo is difficult to start under the condition of breeze.

The invention relates to a permanent-magnet synchronous motor or generator comprising at least one rotor (2) and at least one stator (3, 8). The motor comprises two rotors (2), four stators (3, 8) anda cooling system (7, 7a) comprising three cooling circuits (7, 7a), i.e. two outer circuits (7) which are each accommodated in a longitudinal outer wall of a casing (8), adjacent to an outermost stator (3, 8), for cooling said outermost stator (3, 8), and an intermediate circuit (7a) located between the two innermost stators (3, 8) in the motor for simultaneously cooling said two stators (3, 8),the central shaft (5) being common to the two rotors (2) which are connected to the central shaft (5) by mechanical means.

The invention relates to a flexible starting device of a stirring type wind heater. The device comprises the heater, and a fan, a stirring blade is arranged in a stirring bucket of the heater, the stirring blade is connected to the fan outside the stirring bucket through a transmission shaft and a coupler, a hydrodynamic coupling is connected between the transmission shaft and the coupler, throughthe hydrodynamic coupling, the starting property of the heater is improved, in order to achieve flexible starting of the wind heater, the hydrodynamic coupling is adopted, the hydrodynamic coupling is arranged between the heater and the coupler, through the hydrodynamic coupling, the starting torque of the heating system is obviously reduced, the heating system is started under the condition thatthe wind is weak, and can be normally used, and the starting problem of a wind machine under the low wind speed is solved.

An engine restart apparatus for improving fuel efficiency and reducing torque of an engine may comprise a double-mass type flywheel unit including a main flywheel rotating with an engine connected to a power train and having a ring gear to receive a power from a starter motor and a sub-flywheel rotatably fitted on a crankshaft of the engine and selectively connected to the main flywheel, a power control circuit forming an electric circuit connecting a battery with the sub-flywheel, and a controller combining the sub-flywheel with the main flywheel by connecting an electric current supplied to the sub-flywheel through a power control circuit or separating the sub-flywheel from the main flywheel by cutting the electric current supplied to the sub-flywheel, in accordance with the engine load condition, the engine start condition, and the vehicle mode condition.

The invention relates to a grinding disk of a ground grinding machine driven by a motor. The grinding disk of the ground grinding machine driven by the motor comprises a base disk. The work face of the base disk is an independent flat disk. The width of the work face of the base disk is larger than 500 mm. A motor is a vertical axis direct drive motor. The direct drive motor is directly or indirectly connected with the base disk. A fixing device is arranged on the lower surface of the base disk. The fixing device is fixedly provided with grinding blocks. Compared with the prior art, the grinding disk of the ground grinding machine driven by the motor has the following advantages that the grinding disk is of an independent type, and by changing the arrangement manner of the grinding blocks,and the size of the grinding work face can be freely set; the large-torque direct drive motor is used for driving, so that the torque is large; the ground surface is ground flatly; the grinding blocks can be disassembled, assembled and replaced, and overhauling is rapid and convenient; a middle disk and the base disk are connected through an elastic damping rubber ring, so that the starting torque is reduced, and a buffering function is achieved; installation grooves can adopt circumferential alternate or radial alternate arrangement, so that the installed grinding blocks compensate for one another, the number of the grinding blocks is reduced, and uniform and comprehensive grinding is guaranteed.