187 results about "Commutator (electric)" patented technology

The utility model relates to the field of workpiece surface machining, and discloses an ultrasonic machining assembly, a finishing machining device and a finishing machining system.The ultrasonic machining assembly comprises a support; the transducers are used for converting the high-frequency electric energy into high-frequency mechanical vibration; the vibration commutator is arranged on the support, the outer periphery of the vibration commutator is connected with a plurality of transducers which are sequentially arranged at intervals in the circumferential direction, and the vibration commutator is used for converting high-frequency mechanical vibration of the transducers into high-frequency mechanical vibration in the axial direction of the vibration commutator; and the processing roller is rotatably connected to the axial outer end of the vibration commutator and is used for carrying out ultrasonic rolling processing on the surface of the workpiece. Due to the fact that ultrasonic energy acts on the surface of the workpiece, the surface of the workpiece can generate plastic deformation to introduce residual stress, the microstructure of the surface of the workpiece is changed, the effects of finishing machining and surface strengthening can be achieved at the same time, the quality of the surface of the workpiece can be effectively controlled, and the hardness of the surface of the workpiece can be effectively improved.

The utility model discloses a photoelectric turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator, and relates to the technical field of measurement. The device comprises a turbine rotating mechanism and a detection unit, and the turbine rotating mechanism comprises a shell, a front fluid director, a rear fluid director, a turbine assembly, a right-angle gear commutator, a first plane magnetic coupling and a second plane magnetic coupling, the detection unit comprises a detection cavity and a photoelectric rotating speed sensing device arranged in the detection cavity; axial rotation is converted into transverse rotation through the right-angle gear commutator and the first plane magnetic coupling, the transverse rotation is transmitted to the second plane magnetic coupling in the detection cavity, and the rotation speed of the second plane magnetic coupling is obtained through detection of the photoelectric rotation speed sensing device. And the photoelectric rotating speed sensing device in the detection cavity is not polluted by substances in the shell and is not easily influenced by a magnetic field, high temperature and high pressure, so that the measured flow is accurate.

To simplify assembly and to reduce the susceptibility to faults of a linear drive comprising a transmission housing, an interference-suppressed electric motor which is connected thereto and is accommodated in a motor housing and which by way of a rotor accommodated in the motor housing drives a shaft which is mounted on a rear shaft end in a rear shaft bearing and is mounted on a front shaft end, a commutator for the transmission of current to the rotor, electrical and / or electronic components for interference suppression of the electric motor, it is proposed that the rear shaft bearing is mounted in the motor housing, the front shaft bearing is mounted in the transmission housing and the electrical and / or electronic components required for interference suppression of the electric motor are arranged on an interference suppression circuit board arranged between the front shaft bearing and the commutator.

The utility model discloses a fixed four-linkage electric speed reduction elevator which comprises a motor, the output end of the motor is provided with a hole-shaft double-input lead screw speed reduction elevator, the two output ends of the hole-shaft double-input lead screw speed reduction elevator are respectively provided with a double-shaft input lead screw speed reduction elevator, and the two output ends of the hole-shaft double-input lead screw speed reduction elevator are respectively provided with a double-shaft input lead screw speed reduction elevator. The output end of one double-shaft input lead screw speed reduction elevator is provided with the other double-shaft input lead screw speed reduction elevator. According to the fixed type four-linkage electric speed reduction elevator, a middle reverser of a traditional four-linkage elevator is combined with a speed reduction elevator part, so that the middle reverser is omitted, and the reversing function is achieved through the process that the double-input worm is connected with the first arc bevel gear and the second arc bevel gear; by means of the speed reduction transmission characteristic of the worm gear and the worm, more speed reduction ratios can be obtained, the speed reduction ratio of the speed reduction elevator can be selected according to using requirements, and larger platform bearing force and various lifting speeds are achieved.

The present invention provides an electromagnetic compressor, including a compressor cylinder body, with dead center coils designed at both ends of the compressor cylinder body, and the electromagnetic directions of the coils are opposite to each other with the same poles in the compressor cylinder body after power is applied; a piston coil is provided between the two sets of dead center coils, and the positive and negative poles of the piston coils are electrically connected to the commutator through a guide rod. After the guide rod is connected to the commutator, the piston coil is urged to approach the dead center coil on the opposite side. During the movement of the commutator and the piston head, the position of the guide rod relative to the commutator will change relative to each other, thereby changing the connection direction of the positive and negative poles of the piston coil. The present invention designs a piston compressor based on the principle of electromagnetic induction, and utilizes the same magnetic poles generated at both ends of the cylinder body to make the piston continuously change the magnetic poles at both ends and reciprocate in the cylinder body. The present invention eliminates the crankshaft, crosshead, coupling, motor transmission mechanism, etc. in the traditional piston compressor, and has a simple structure.

The utility model discloses a novel walking type turner, which relates to the technical field of turners and comprises a truss, four corners of the truss are fixedly connected with supporting legs, the bottom ends of the supporting legs are movably connected with sliding rail type walking wheels, the bottom of the truss is slidably connected with an electric hoist frame, four corners of the electric hoist frame are provided with hydraulic oil cylinders, and the hydraulic oil cylinders are provided with hydraulic oil cylinders. A driving motor frame is arranged at the bottom ends of the four hydraulic oil cylinders, a cross-shaped commutator is fixedly connected to the bottom end of the driving motor frame, driving shafts are arranged at the left end and the right end of the cross-shaped commutator, turning wheels are arranged at the ends, away from the cross-shaped commutator, of the driving shafts, and the track of each turning wheel is a rounded square. Aiming at the problems of incomplete turning and throwing and incapability of turning and throwing at the corner of the ectopic fermentation bed, the turning and throwing wheel is formed after optimization by virtue of the characteristic that the motion trail of the Leyo triangle is a rounded square, so that turning and throwing at the corner are realized, and the problem of incomplete turning and throwing is solved.

An electric motor with shaft, rotor and stator. The stator has a pair of magnets amd the rotor has a number of rotor poles, and the same number of electrically isolated pole windings and inter-pole spaces. The motor has first and second commutators, each divided into equally arc spaced commutator segments, the same number as the number of rotor poles.Each winding begins at a segment of the first commutator, passes through a first inter-pole space and back through an inter-pole space two spaces counterclockwise of the first space to complete a first winding turn, and after pre-selected number of winding turns, passes back through an inter-pole space three spaces counterclockwise of the first space for a second same number of winding turns as the first pre-selected number. The winding is completed at an segment of the second commutator arc-aligned at the same arc degree on the rotor shaft with the first commutator.In the electric motor the two magnets are separate by a gap between them such that a line through the gap is 90 degrees out of alignment with a line between a pair of oppositely signed motor brushes.The electric motor has two brush sets, with each of the two brush sets each having a pair of oppositely disposed brushes electrically isolated from each other and on opposite sides of the commutator.A method for parallel simultaneous internal generation of an output current in a motor, while the motor is drawing current to spin a motor shaft is also presented.

The application provides an armature commutator post-process production line, and belongs to the technical field of armature production. The armature commutator post-process production line comprises a rack, a first conveying line, a first detection mechanism, a second conveying line, a grinding mechanism and a second detection mechanism. The first detection mechanism can detect the electrical conductivity of the material, the grinding mechanism can grind the material, and the second detection mechanism can detect the smoothness of the material grinding part. The conveying paths of the first conveying line and the second conveying line can realize the automatic conveying of the material in the first detection mechanism, the grinding mechanism and the second detection mechanism. Through the cooperation of the first conveying line, the second conveying line, the first detection mechanism, the grinding mechanism and the second detection mechanism, the electrical conductivity detection of the armature and the surface grinding of the armature commutator can be realized completely automatically, and the production efficiency of the armature is improved.

The invention relates to a contactor comprising an electric motor (2) comprising a stator (200) and a rotor (201) and a commutator-brush system (3), the commutator-brush system comprising: a commutator (300) assembled on the rotor, the commutator comprising at least one electrically conductive portion (302) and at least one non-electrically conductive portion (303); and a pair of brushes formed of two brushes (304), wherein the brushes each have a contact surface configured to frictionally contact the commutator. The side surface of the commutator (300) comprises a conductive portion (302) and a non-conductive portion (303) of the commutator, wherein the commutator is free to rotate about an axis of rotation (X). The commutator-brush system (3) is configured to move between an electrically conductive position, in which the commutator electrically connects the pair of brushes, and an interrupted position, in which the commutator electrically isolates the pair of brushes (304), the commutator-brush system transitions from the electrically conductive position to the interrupted position by rotation of the commutator (300) under the action of the motor, and transitioning from the interruption position to the conductive position.

The utility model discloses an electric motor based on a PCBA control board, and relates to the technical field of motors. The carbon brush replacing device comprises the pushing mechanism, the clamping mechanism and the outer shell, the pushing mechanism comprises the square shell, the third sliding groove is formed in the back of the square shell, through the arrangement of the clamping mechanism, rapid replacement of a carbon brush is achieved, the problem that the carbon brush of an electric motor is difficult to replace is solved, a user can easily push out an old carbon brush through simple operation, and the carbon brush replacing efficiency is improved. A new carbon brush is rapidly installed in place, the replacement efficiency is improved, the maintenance cost is reduced, stable connection between the square shell and the outer shell is achieved, the overall structural strength and stability of the electric motor are improved, the pushing mechanism smears lubricating oil on the surface of the commutator, friction between the carbon brush and the commutator is effectively reduced, and the service life of the commutator is prolonged. Along with continuous grinding of the carbon brush, the sponge block can correspondingly move leftwards, and the wiping effect on the carbon powder on the surface of the commutator is improved.

The invention belongs to the technical field of liquid flow standard devices, and particularly discloses a liquid flow standard device electric drive commutator which comprises a mounting table, the top of the mounting table is fixedly connected with a mounting frame, and the top of the mounting table is fixedly connected with two symmetrically-distributed mounting plates. A driving assembly is arranged on the surface of the mounting frame; the outlet flow velocity distribution of the Bezier line fishtail nozzle is better than that of a traditional linear nozzle and a traditional arc-shaped nozzle, when the flow velocity is low, the Bezier line enables liquid close to the outer wall of the fishtail nozzle to flow gently according to the viscous effect of fluid, and the state that the outlet of the nozzle is filled with the liquid is achieved; when the flow speed is large, the situation that liquid is blocked from being sprayed to the edge of the fishtail nozzle due to the fact that the curvature of the inward-converging section is too large is avoided, the fishtail nozzle meets the requirement for adapting to different flows through the shape line design, and other complex design with the leakage problem does not need to be conducted on the fishtail nozzle structure.

The utility model provides a micromotor, which comprises a shell, a group of carbon brushes, an armature, a commutator, a permanent magnet and an output shaft, one end of the commutator is electrically connected to the armature, and the other end of the commutator is fixedly connected to the output shaft; the two sides of the commutator are respectively and oppositely provided with a carbon brush. The armature is wrapped by the shell; a group of opposite permanent magnets are arranged on the inner wall of the shell; a preset distance is arranged between the opposite permanent magnets; the output shaft penetrates out of the shell and extends out by a preset distance. The service life is effectively prolonged, and the operation noise is reduced through the arrangement of the narrow groove, so that the service life of the micromotor is long.

The invention relates to a brush machine (10) for an electrical machine comprising a commutator (12) having an axis of rotation (C) and at least one brush (14) configured to be in contact with an external surface (S) of the commutator. The commutator (12) comprises several commutator blades (16) arranged around the periphery of the commutator. Each blade comprises a body (161) extending longitudinally along the axis of rotation and an external surface (163) forming a portion of the external surface of the commutator. According to the invention, each blade has at least one channel (166) formed inside the blade body and near its external surface (163) and configured to be partially filled with a liquid under vacuum. The brush machine includes at least one heat dissipation device (30) and connecting elements (40), each configured to connect each channel (166) of a blade to a cooling device. (See Figure 4 for abbreviations.)

The utility model discloses a press-fitting machine for mounting a motor commutator, which comprises an operating platform, an adjusting platform arranged in the operating platform, a mounting groove arranged on the inner side wall of the operating platform, a motor fixedly mounted in the mounting groove, a screw mounted at the output end of the side surface of the motor, and a side end of the screw movably connected to the inner side wall of the operating platform through a bearing. A sliding seat is movably connected to the screw rod, the top wall of the sliding seat is fixedly connected to the bottom wall of the adjusting table, the motor is started to drive the screw rod to rotate, the screw rod rotates to drive the sliding seat to move, so that the adjusting table moves to the position under the pressing head, and a sliding groove is formed to be matched with a sliding block for use, so that the sliding seat is higher in moving stability; and by starting the electric push rod, the electric push rod downwards pushes the telescopic rod, and the telescopic rod downwards pushes the pressing head, the steering gear is rapidly pressed, convenience and rapidness are achieved, time and labor are saved, and the adjusting table is convenient to move, more convenient to operate by workers and higher in safety.

The utility model discloses a low-consumption high-energy coreless motor, which relates to the technical field of motors and comprises a shell and an upper end cover clamped at the upper end of the shell. And a lower end cover is installed at the lower end of the shell in a clamped mode, a wiring piece is fixedly installed at the lower end of the lower end cover, a connecting plate is fixedly installed on the outer side of the rotating shaft through a commutator, and a cup-shaped coil located in the shell is fixedly installed on the outer side of the connecting plate. According to the low-consumption and high-energy coreless motor, high-temperature gas in the coreless motor can be quickly discharged, the temperature rising speed in the coreless motor is reduced, the ventilation effect of the coreless motor is ensured, and the effect of converting electric energy into kinetic energy in the coreless motor is improved; the heat dissipation hole ring and the heat dissipation hole plate can absorb heat in the shell, meanwhile, heat transfer between the heat dissipation hole ring and the heat dissipation hole plate and air is achieved, rapid cooling of the interior of the motor is achieved, and the low-consumption and high-energy effects of the motor are further guaranteed.

The utility model provides an output energy management circuit for a friction nano-generator. The output energy management circuit comprises a commutator circuit and an energy storage sub-circuit which are connected with the friction nano-generator. The output end of the commutator circuit comprises a first output end and a second output end; the energy storage sub-circuit comprises a first capacitor, a second capacitor, a first diode, an inductor, a selective switch and a breakdown device; two ends of the first capacitor are electrically connected with the first output end and the second output end respectively; the selective switch comprises a fixed end, a first connecting end and a second connecting end, the cathode of the first diode is electrically connected with the fixed end, and the anode of the first diode is electrically connected with the first connecting end through the first output end, the second capacitor and the inductor in sequence and is electrically connected with the second connecting end through the first output end, the first capacitor, the second output end and the breakdown device; different output modes are provided by switching the connection between the fixed end and the first connecting end and the connection between the fixed end and the second connecting end. By arranging the circuit, a continuous and stable power supply can be provided for the load.

The utility model provides a single-turn coil motor principle demonstrator, which comprises an iron bottom plate, the upper surface of the iron bottom plate is fixedly connected with a fixing frame, the top end of the fixing frame is rotatably provided with a rotating hand wheel, the middle part of the fixing frame is provided with a rotatable stator magnet frame, and the rotatable stator magnet frame is provided with a strong magnet. A commutator is rotationally installed in the middle of the iron bottom plate, a single-turn coil rotor shaft is axially installed on the commutator, a single-turn copper coil is arranged on the single-turn coil rotor shaft, a current direction indicating circuit board is installed at the bottom end of the single-turn copper coil, and a copper electric brush is installed between the current direction indicating circuit board and the commutator. The input and output terminal and the red and green LED lamp are respectively arranged on two sides of the edge of the upper surface of the iron bottom plate; the demonstrator adopts a vertical tip structure, is small in friction force, flexible in rotation, obvious in demonstration effect, smaller in friction force and smoother in rotation due to the design of the rotating circuit board and the indication of the current direction of the single-turn copper coil by the red and green indication lamps, and the rotating part adopts the single-side bearing.

The present invention relates to the technical field of power detection equipment connection, and discloses a movable wiring device for an automotive motor power analyzer, which includes a main body component, including a power analyzer, a detection line, a support shell, a motor plug and a detection socket. Both ends of the detection line are respectively connected to the power analyzer and the support shell. The motor plug is located above the support shell, and the detection socket is arranged on the support shell; a connection component is arranged inside the support shell, including an adjustment seat fixed inside the support shell, a first conductive bar fixed inside the adjustment seat, a commutator fixed inside the adjustment seat, and a connection pin electrically connected to one side of the commutator. The beneficial effect of the present invention is that by setting the connection component, the wire sequence of the connection can be converted by moving the moving seat, so that the staff does not need to re-wire multiple times, improving the detection efficiency and reducing the misoperation of the staff.

The utility model discloses a mechanism for measuring multiple dimensions of a motor rotor, which comprises a first support assembly, a second support assembly fixed with the first support assembly, and a sliding fit seat fixed on the first support assembly, the supporting part is used for supporting the rotor and is matched with the sliding fit seat; the clamping assembly is used for clamping the rotor, and the clamping assembly is matched with the sliding fit seat; the positioning mirror is used for observing the positions of multiple sizes on the rotor, is fixed with the second supporting assembly and is positioned on one side of the sliding fit seat; when the width of the notch groove on the commutator is measured, the rotor is erected and is in plug-in fit with the supporting component; when the lengths of the commutator finish turning section and the notch groove are measured, the two ends of the rotor are clamped by the clamping assemblies. According to the utility model, the length and width of the finish turning section and the notch groove on the commutator can be detected.

The invention discloses a subreflector electric lifting assembly and an antenna, and belongs to the technical field of antennas. The auxiliary reflecting surface electric lifting assembly comprises a bottom plate, a driving motor, two reversing transfer cases, a plurality of right-angle commutators, three linear executing mechanisms and a connecting plate. A driving motor divides power into two paths through a first reversing transfer case, and one path drives a first linear execution mechanism through a first vertical right-angle reverser; and the other path sequentially passes through a first horizontal right-angle reverser and a second reversing transfer case for secondary distribution and steering, and finally drives a second linear actuating mechanism and a third linear actuating mechanism directly and respectively through a second horizontal right-angle reverser and a second vertical right-angle reverser. The three linear executing mechanisms stretch out and draw back synchronously to drive the connecting plate and the auxiliary reflecting surface to lift integrally and stably. The single driving motor is matched with the specific mechanical transmission chain, so that three-point rigid synchronous driving is realized, and the problems of inconvenience in manual lifting of the auxiliary reflecting surface of the vehicle-mounted antenna, poor synchronous precision of multiple motors and over-limit transportation are solved.

To provide a motor that enables fail-safe operation while suppressing increases in manufacturing costs. [Solution] The motor body comprises a rotor rotatable about a central axis and a stator having a plurality of coils and facing the rotor with a gap between them; a control unit having a drive circuit capable of driving the motor body; a plurality of commutator members, each electrically connected to at least one coil; a first brush member that rotates with the rotor and can contact the commutator members; and a second brush member that rotates with the rotor and can contact a commutator member different from the commutator member that the first brush member contacts. The control unit switches the drive method for driving the motor body between a first drive method, which drives the motor body by supplying current to the plurality of coils via the drive circuit, and a second drive method, which drives the motor body by supplying current to the plurality of coils via the first brush member, the second brush member, and the plurality of commutator members.

The invention relates to the field of electricity, in particular to an electrostatic technology. The electrostatic polarity commutator comprises a motor and an electric brush system; the electric brush system is provided with a commutator, at least one electric brush matched with the commutator, and a slip ring mechanism; the motor is in driving connection with the commutator, and the commutator comprises at least two mutually insulated commutator segments; the electric brush is provided with a wiring terminal used for being connected to an electrostatic electrode; the slip ring mechanism comprises at least two conductive rings which are insulated from each other, and the at least two conductive rings are respectively connected to the two commutator segments.

A power tool is less likely to generate noise. A power tool includes a housing, a field fixed to the housing and including a field coil, an armature rotatable relative to the field and including a commutator, two brushes that come in contact with the commutator, and a brush holder unit holding the two brushes. The brush holder unit includes two contact rails electrically connectable to the field coil, two first terminals that each come in contact with either of the two contact rails, two second terminals each electrically connectable to a corresponding brush of the two brushes, and a choke coil located between at least one of the two first terminals and at least one of the two second terminals.

The invention discloses an alternating current and direct current voltage coordination matching control method of a modular commutation type converter. The method comprises the following steps: generating three-phase sine reference signals corresponding to single-phase converters based on electrical data of an MCC alternating current side; on the basis of a delay commutation trigger mechanism, a commutation delay angle is introduced to modulate a three-phase sine reference signal, so that each cascade module chain is controlled to perform voltage synthesis, and a direct-current side output voltage of the modular commutation type converter is obtained; real-time current data of the MCC direct current side are collected, and when it is judged that the direct current side output voltage or the real-time current data meet the voltage reduction triggering preset condition, a commutation delay angle in a delay commutation triggering mechanism is dynamically adjusted according to the direct current side output voltage and the real-time current data; and a target delay angle is obtained to repeat the modulation process of the three-phase sine reference signal until the voltage reduction trigger preset condition is not satisfied any more, so that continuous and stable operation of the AC side voltage during the abnormal drop period of the DC side voltage is ensured.

This disclosure provides a rotor positioning device, belonging to the field of motor manufacturing technology. The positioning device includes a drive component and a detection component. The output shaft of the drive component is connected to one end of the rotor to be tested. The detection component is located on one side of the drive component and on the outer periphery of the rotor core. The detection component is configured to detect the presence of teeth on the rotor core within its detection range. The positioning device provided by this disclosure can quickly locate the rotor's position, enabling rapid electrical connection between the commutator on the rotor and external testing equipment.

The invention discloses a permanent magnet module type cooling direct-current energy-saving motor, and relates to the technical field of electrical engineering, the permanent magnet module type cooling direct-current energy-saving motor comprises a motor shell, a rear end cover and a front end cover, the front end cover is rotatably connected with a common shaft, the outer wall of the common shaft is fixedly connected with a commutator and an armature module in sequence, and T-shaped seats are arranged on the inner wall of the motor shell in a circular array mode. A pair of electric brushes is attached to the outer wall of the commutator, and the motor shell is provided with a bidirectional cleaning assembly at one end of the commutator. The bidirectional cleaning assembly is arranged in the motor shell, on the premise that the motor and an electric brush are disassembled, a traction rope on the bidirectional cleaning assembly can be manually pulled, a cleaning ring cylinder can move along the outer wall of the commutator, synchronous adsorption and cleaning of electric brush powder on the outer wall of the commutator are achieved in cooperation with an inner suction hole, poor contact caused by dust accumulation is avoided, and the service life of the commutator is prolonged. Compared with a traditional mode of manually disassembling the electric brush and cleaning the commutator, maintenance steps and downtime are remarkably reduced, and the running stability and reliability of the motor are improved.

This utility model discloses a motor commutator, including a housing. A drive shaft is installed at the center of the top of the housing, and a drive gear is connected to the bottom of the drive shaft. Four commutation components are installed in a ring around the drive gear inside the housing. The advantages are: by installing four commutation components, each consisting of an electric actuator, connecting bearing, sliding sleeve, protruding edge, driven gear, and driven shaft, in a ring around the drive gear inside the housing, and by installing a guide assembly consisting of a guide slide and a guide groove between the sliding sleeve of each commutation component and the side wall of the housing, the motor commutator can be used to ensure the meshing of the driven gear and drive gear in the corresponding direction by controlling the extension and retraction of the electric actuators in each commutation component. This allows for the on-demand transmission of motor power in four mutually perpendicular directions in the horizontal plane, effectively improving the flexibility of the motor commutator.

The present invention discloses a miniature commutator pressing device, comprising an operating table, a plurality of supporting legs being provided below the operating table, a controller being provided on one side of the operating table, a plurality of first connecting plates being provided on the side of the operating table away from the controller, a second connecting plate being provided on the upper end of the first connecting plate close to the controller, a connecting circular groove being provided through the upper end of the second connecting plate, a pressing structure being provided on the side of the first connecting plate, the pressing structure comprising a first electric telescopic rod, a third connecting plate being provided below the first electric telescopic rod, a connecting cylinder being provided below the third connecting plate, a pressing device being provided below the connecting cylinder, the pressing device comprising two symmetrically arranged first semicircular plates, a first connecting column being provided above the first semicircular plates, a moving block being provided above the first connecting column, a moving circular groove being provided through the side of the moving block, and two first springs being symmetrically provided between the two moving blocks; the present invention can perform press-in processing on miniature commutators of different sizes.

According to the electronic switch used for controlling the slot control motor, one end of a box body is provided with a main power supply input end, the other end of the box body is provided with a main power supply output end, a U-phase power supply, a V-phase power supply and a W-phase power supply in the main power supply input end are respectively connected with a main loop, and meanwhile, safety devices are arranged on the U-phase power supply and the V-phase power supply; the main loop is provided with four alternating current reversing switches used for being connected with a slot control motor, the main loop is connected with a voltage detector and a current detector, the voltage detector and the current detector are respectively connected with a data processor, the data processor is connected with a controller, and the controller is connected with an optoelectronic isolator, a state indicating lamp, a thyristor and a control input end. The invention has the characteristics of long service life, large controllable power, small volume and no mechanical wear and arc corrosion risk.

An electric motor with shaft, rotor and stator. The stator has a pair of magnets and the rotor has a number of rotor poles, and the same number of electrically isolated pole windings and inter-pole spaces. The motor has first and second commutators, each divided into equally arc spaced commutator segments, the same number as the number of rotor poles.