WO2019127097A1 - 一种大功率电磁调速电机 - Google Patents

一种大功率电磁调速电机 Download PDF

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Publication number
WO2019127097A1
WO2019127097A1 PCT/CN2017/118995 CN2017118995W WO2019127097A1 WO 2019127097 A1 WO2019127097 A1 WO 2019127097A1 CN 2017118995 W CN2017118995 W CN 2017118995W WO 2019127097 A1 WO2019127097 A1 WO 2019127097A1
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Prior art keywords
outer rotor
coil
inner rotor
junction box
rotor
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PCT/CN2017/118995
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English (en)
French (fr)
Inventor
黄忠念
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南京玛格耐特智能科技有限公司
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Publication of WO2019127097A1 publication Critical patent/WO2019127097A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/02—Machines with one stator and two or more rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors

Definitions

  • the invention relates to a motor, in particular to a high-power electromagnetic speed regulating motor.
  • the conventional device uses a common motor to connect the water pump, the fan and the compressor through the coupling. Since the ordinary motor does not have the speed regulation capability, the motor and the water pump rotate at the rated speed during operation, and the valve or the damper of the pump passes through the pump. For throttling adjustment, the energy saving efficiency of throttling adjustment is very low, resulting in the actual working energy consumption of these devices is higher than the ideal working energy consumption (all devices reach the theoretical maximum working efficiency).
  • the effective solution is to adjust the speed of the motor, change the speed of the motor to meet the needs of the site according to the actual needs of the site, and at the same time play the dual purpose of adjusting user demand and energy saving.
  • the existing main speed control methods include variable speed hydraulic couplings, frequency converters and variable speed permanent magnet couplers.
  • variable speed hydraulic coupler transmits torque with liquid as the working medium, and it has a certain stepless speed regulation function.
  • the hydraulic coupler speed regulation has the advantages of stepless speed regulation, no change of power supply frequency, reduction of starting shock and starting load, and no harmonic pollution.
  • the variable speed hydraulic coupler has the disadvantages of low efficiency, hydraulic oil pollution environment, high cost of use and inconvenient maintenance. Today, with emphasis on energy conservation and environmental protection, only a few users choose to use it, and it has a tendency to gradually withdraw from the market.
  • the frequency converter is a kind of speed control technology that uses power electronic technology to change the working frequency of the power grid to change the speed of the three-phase asynchronous motor.
  • the frequency converter has the advantages and functions of high efficiency and speed regulation precision, fast speed response and soft start. It has a wide range of applications in the field of automatic control and motor speed regulation and energy saving.
  • the frequency converter has the disadvantages of complicated system, low reliability, high maintenance, high use and maintenance cost, harmonic pollution of the power grid, high requirements on the working environment and weak anti-interference ability, which limits the use of some users, especially Some metallurgical, petroleum, chemical, electric power and cement building materials and other work environments are relatively harsh.
  • variable speed permanent magnet coupler is a new type of speed control technology developed in recent years. It uses the induction force and the induced torque generated by the relative motion of the permanent magnet and the conductor to transmit power and adjusts the torque by adjusting the magnetic flux.
  • the variable speed permanent magnet coupler has the advantages of high efficiency, simple and reliable structure, low use and maintenance, no harmonic pollution and strong anti-interference ability. However, compared with the inverter, its speed regulation accuracy and response speed are lower than that of the inverter, which greatly limits its application in the field of automatic control. At the same time, the variable speed permanent magnet coupler has low efficiency and relatively hot heat when running at low speed. Defects. Since metallurgy, petroleum, chemical, electric power, cement and building materials, water and some machinery industries do not require high speed accuracy and response speed, the speed-regulated permanent magnet coupler has gained certain market and user recognition for its advantages.
  • the technical problem to be solved by the present invention is that, in view of the above shortcomings of the prior art, a high-power electromagnetic speed regulating motor is proposed, which has the advantages of simple structure, convenient operation, and soft start function, and can perform output torque and rotational speed of the motor. Adjusting, reducing the working current of the motor, achieving the effect of energy saving, and converting the energy difference formed by the difference of the rotational speed with the electric energy of the same frequency and the same phase of the power grid to the input end of the power grid to supply power to the motor, further realizing energy saving.
  • a high-power electromagnetic speed-regulating motor including a motor casing, and an active device and a driven device are disposed inside the motor casing and along the length thereof, and actively
  • the device is comprised of a non-rotating stator assembly and a rotating inner rotor assembly
  • the driven device includes an outer rotor assembly, wherein the rotating inner rotor assembly includes a first inner rotor and a second inner rotor, between the first inner rotor and the stator assembly, The second inner rotor and the outer rotor assembly each have a rotational gap, the first inner rotor and the stator assembly are electromagnetically coupled to transmit torque, and the second inner rotor and the outer rotor assembly are electromagnetically coupled to transmit torque.
  • the stator assembly includes a stator core fixed to the motor casing, and a stator coil is arranged along the longitudinal direction of the stator core, and the stator coil is connected to the external power grid;
  • the inner rotor assembly includes a driving shaft, and the driving shaft is fixedly connected to the motor casing through a bearing, and the first inner rotor and the second inner rotor are sequentially disposed along the longitudinal direction of the driving shaft, and the first inner rotor and the second inner rotor are squirrel-cage rotors.
  • the first inner rotor corresponds to the stator core, and the stator coil is energized through the external power grid, and the first inner rotor is driven to rotate by the electromagnetic coupling torque, and finally the main shaft is synchronously rotated.
  • the outer rotor assembly includes a driven shaft, the driven shaft is fixed to the motor casing through a bearing, and a rotor core skeleton is arranged at an end of the driven shaft close to the second inner rotor, and the rotor core skeleton is arranged
  • An outer rotor core corresponding to the second inner rotor is disposed, an outer rotor coil is disposed along the longitudinal direction of the outer rotor core, and an electromagnetic coupling is performed between the second inner rotor and the outer rotor core to drive the driven shaft to rotate.
  • the outer rotor coil is connected to the outer rotor coil junction box by a slip ring provided on the driven shaft.
  • the first inner rotor comprises an inner rotor core which is sleeved on the driving shaft and is stacked with a plurality of cold-rolled silicon steel sheets to have a certain thickness, and the first inner rotor and the second inner rotor have the same structure.
  • a plurality of guide bars and insulated guide bars for use with the guide bars are interposed inside the two inner rotor cores, and each of the guide bars passes through the first inner rotor and the second inner rotor at the same time, and is provided at both ends of the guide bar
  • the end ring conductor connects the two inner rotor cores into one body through the end ring conductor and the guide bar, and the bar is disposed between the two inner rotor cores and is provided with a guide strip pretensioning band.
  • the minimum distance between the first inner rotor and the second inner rotor in the axial direction is L, and the L dimension is greater than 200 mm
  • the mounting shaft is provided with a mounting hole at one end of the driven shaft near the driving shaft, and the mounting hole
  • the electromagnetic speed regulating motor is provided with a plurality of bearing temperature measuring probes, and the speed measuring gear is arranged on the driven shaft and fixed at A speed probe for measuring the rotational speed on the motor casing, and a moisture-proof heater inside the motor casing.
  • the high-power electromagnetic speed regulating motor has a cooling system inside the motor casing, and the cooling system is composed of an inner circulation device and an outer circulation device.
  • the motor casing includes a base and a casing disposed at the upper end of the base, and the active device and the driven device are both Set in the base;
  • the outer circulation device comprises a cover shell, the cover shell has an L shape, and a fan cover for placing the fan is arranged at one end along the length direction of the cover shell, and a plurality of heat exchange tubes are arranged along the length direction inside the cover shell, and one end of the heat exchange tube and the fan
  • the cover is internally connected, and the other end is connected to the outside.
  • An external circulation fan is arranged outside the base of the drive shaft, and the external circulation fan is disposed inside the fan cover;
  • the inner circulation device comprises an inner circulation first fan and an inner circulation second fan, wherein an inner circulation first fan is arranged at one end of the driving shaft close to the outer circulation fan, and an inner circulation second is arranged at an end of the driven shaft close to the skeleton of the rotor core.
  • the driving shaft is provided with a plurality of spline bosses along the circumferential direction thereof, and the first inner rotor and the second inner rotor are provided with grooves corresponding to the spline bosses, and the first inner rotor and the second inner rotor
  • a wind passage is arranged between the main shaft and the air core frame, and a ventilation hole is arranged on the iron core frame, and the inner fan and the air passage are connected to the air passage through the air circulation hole, and the internal air is circulated to the second fan through the inner air circulation first fan.
  • the second fan in the inner circulation diffuses the heat exchange tube at the upper end of the hot air, and the outside of the heat exchange tube passes through the external low temperature wind, and uses the temperature difference between the inner and outer winds to exchange heat, thereby achieving the purpose of cooling the inside of the base, wherein the inner circulation is
  • the shaft power of the second fan is designed to be 2 times or more of the shaft power of the first fan of the inner circulation.
  • the aforementioned high-power electromagnetic speed regulating motor, the electromagnetic speed regulating motor control system comprises a main controller, an outer rotor coil junction box arranged on the motor casing, a feedback electric junction box, a grid junction box, a feedback electric junction box and a grid junction box
  • the internal circuit is connected in parallel by the wires, and then connected to the stator coil, and a main working circuit is arranged between the outer rotor coil junction box and the feedback electric junction box;
  • the main working circuit includes a main circuit breaker connected in series, an outer rotor side filter, an outer rotor side converter circuit, a stator side converter circuit, a stator side filter, a low voltage switch cabinet, a step-up transformer and a high voltage switch cabinet;
  • a voltage anti-jamming device for preventing low voltage interference of the power grid is connected between the outer rotor side converter circuit and the outer rotor side filter, and the outer rotor side converter circuit and the stator side converter circuit are a pair of symmetric PWM control circuits. Achievable controllable dual-conducting power supply;
  • An auxiliary working circuit is further disposed on the side of the outer rotor coil junction box, and the auxiliary working circuit is arranged in parallel with the main working circuit, and the auxiliary working circuit comprises an auxiliary circuit breaker and a resistance regulator connected in series with the outer rotor coil junction box;
  • the main circuit breaker, the outer rotor side converter circuit, the low voltage switch cabinet, the high voltage switch cabinet, the auxiliary circuit breaker and the control terminal of the resistance regulator are all connected with the main controller, and the main controller is connected with the grid phase detector to accept the grid. Phase signal.
  • the aforementioned high-power electromagnetic speed regulating motor has a speed detecting junction box, a transition bearing filling window, a bearing temperature measuring junction box, an outer rotor coil junction box, a coil temperature measuring junction box, a moisture-proof heater junction box, and a feedback power supply on the motor casing.
  • the rotation speed detecting junction box, the bearing temperature measuring junction box, the outer rotor coil junction box, the coil temperature measuring junction box, the moisture-proof heater junction box, the passing through the wire and the speed measuring probe, the bearing temperature measuring probe, the collecting ring, the stator coil measuring Temperature probe, outer rotor coil temperature probe, moisture-proof heater, and the feedback ports of various detection instruments described above are connected to the main controller
  • Step 1 Electromagnetic speed control motor starting method: first disconnect the main circuit breaker, auxiliary circuit breaker and low voltage switch cabinet, turn off the moisture-proof heater for 10-15 minutes, then turn off, then the grid junction box is connected to the grid to energize, the stator coil In the middle of the current, the induced magnetic field of the power frequency change is established in the stator core, and the induced current is also generated in the guide bar. Under the action of the induced current, the drive shaft is continuously accelerated, and reaches the rated speed after 5-20 s.
  • the speed of the moving shaft is 0; then the switch of the main circuit breaker and the low voltage switch cabinet is closed, and the main controller controls the current of the stator coil to exceed the rated current by controlling the current in the outer rotor coil, so that the speed of the driven shaft is continuously increased until reaching The speed required to meet the process requirements, while the electric energy generated by the slip of the outer rotor coil is converted into the stator coil by the conversion of the main control loop into the same electrical energy as the grid voltage, frequency and phase;
  • Step 2 The electromagnetic speed regulating motor enters the normal adjustment method; when the user needs to prompt the speed to be increased, the main controller controls the current of the outer rotor coil to increase by increasing the duty ratio of the outer rotor side converter circuit until the requirement is met; When the user demand indicates that the rotation speed needs to be reduced, the main controller controls the current of the outer rotor coil to decrease by reducing the duty ratio of the outer rotor side converter circuit until the demand is met, and the electric energy generated by the outer rotor coil slip passes through the main control. The conversion of the loop becomes the same electrical energy as the grid voltage, frequency and phase fed back to the stator coil;
  • Step 3 When the main control loop composed of the main breaker, the outer rotor side filter, the outer rotor side converter circuit, the stator side converter circuit, the stator side filter, the low voltage switch cabinet, the step-up transformer and the high voltage switch cabinet fails
  • the main controller immediately controls the switch of the main circuit breaker and the low voltage switchgear to be disconnected, the auxiliary circuit breaker is turned on, the resistance regulator and the outer rotor coil form a closed loop, and the main controller controls the resistance regulator to adjust the resistance in the loop, thereby adjusting The current of the outer rotor coil, thereby adjusting the output rotation speed and torque of the outer rotor coil, at which time the electric energy emitted by the outer rotor coil slip is dissipated by the resistance heat of the resistance regulator;
  • Step 4 Stopping method: The main controller will open the switch that controls the main breaker, the auxiliary breaker and the low-voltage switchgear, and then the grid junction box is disconnected from the grid, and the moisture-proof heater is controlled to maintain the internal temperature of the electromagnetic speed-regulating motor. And insulation.
  • the electromagnetic speed regulating motor in the technical solution is provided with an active device and a driven device.
  • the main controller controls the current in the outer rotor coil to be controllablely increased, and the soft start of the motor can be realized, and then the outer rotor is adjusted.
  • the current of the coil gradually increases the torque and the speed, gradually increases the current, finally reaches the required output speed, reduces the impact of the higher starting current on the grid and the stator coil, reduces the interference of the equipment startup on the grid and extends the equipment.
  • Service life and has a small heat generation, high work efficiency, low energy loss and energy saving during the starting process;
  • the output rotation speed can be adjusted according to the working condition, thereby reducing the actual working current of the motor, and the working current is often far less than the rated current, which is not only convenient to operate, but also has significant power saving effect and saves electricity;
  • the electricity generated by the electromagnetic coupler can be rectified by the outer rotor side converter circuit, the stator side converter circuit, and the step-up transformer. After the voltage is applied to the stator coil at the same time as the power grid, the current and the active power of the motor from the power grid can be further reduced, thereby improving the power saving space.
  • the working efficiency of the speed regulating portion of the device of the present invention exceeds and varies little with the change of the output rotational speed, and the cooling system of the technical solution is composed of an inner circulation device and an outer circulation device.
  • the heat transfer between the cycle and the outer cycle reduces the temperature inside the motor, and the cooling effect is remarkable.
  • the spline boss is arranged on the drive shaft, thereby setting the air passage, and the active device can be activated when the drive shaft rotates. There is flowing air inside, taking away a lot of heat, and then interacting with the heat exchange tube, performing heat exchange, reducing internal temperature, obvious cooling effect, simple structure, convenient operation, safe and reliable;
  • the energy saving rate and working efficiency of the device of the present invention are much higher than those of the ordinary motor, the variable speed hydraulic coupler and the variable speed permanent magnet coupler, and are slightly more efficient than the operating efficiency of the frequency converter. high.
  • the heat generation rate of the apparatus of the present invention is small due to the high work efficiency of the apparatus.
  • the electromagnetic speed regulating motor has the advantages of simple structure, high reliability and low manufacturing cost.
  • the technical solution is composed of a general mechanical structure, and has few components, and is equivalent to an ordinary motor, a hydraulic coupler and a magnetic coupler, and belongs to a mechanical device. Compared with the inverters with thousands of components, the structure is much simpler, and the corresponding reliability is greatly improved. At the same time, compared with the current popular variable speed permanent magnet couplers, expensive expensive never used. Magnetic materials make the cost of the equipment significantly lower.
  • the device of the invention does not need to use working medium or cooling device such as hydraulic oil, cooling water and cooling oil during use, and does not require energy consumption of auxiliary devices of the fan, the water pump and the oil pump, so the invention has low use cost.
  • the present invention does not need to replace the power components regularly like the frequency converter and does not replace the hydraulic oil when the maintenance is the same as the hydraulic coupler, so the maintenance cost of the present invention is also low;
  • the anti-interference ability is strong.
  • the power generation power of the control system of the present invention is only within 15% of the total power of the motor, and there is no need to involve several parallel and parallel connection of several power components to the frequency converter, the interference factor is less, and the main power supply system is not changed. , there is immediate external interference, and the impact on the operation of the system is minimal;
  • the switch of the main circuit breaker and the low voltage switchgear is disconnected, the auxiliary circuit breaker is turned on, the resistance regulator and the outer rotor coil form a closed loop, and the controller controls the resistance regulator to adjust the resistance in the loop, thereby adjusting the outside
  • the current of the rotor coil in turn, adjusts the output speed and torque of the outer rotor coil, gradually reduces the rotational speed, avoids unnecessary safety accidents, and improves the reliability and safety of the device;
  • the control system can gradually increase the current of the outer rotor coil, so that the torque of the driven shaft is gradually increased, and gradually increases to the required torque and the load speed to achieve the soft start effect.
  • the control system can reduce the current of the outer rotor coil to protect the system.
  • the control system can cut off the current of the rotor coil, so that the output torque is 0, and the function of charging shutdown is achieved;
  • the technical solution can also control the main working circuit, and supply power to the outer rotor coil in reverse, realize the connection between the external power grid and the outer rotor coil, greatly increase the torque of the electromagnetic speed regulating motor, and can exceed the actual speed.
  • the rated speed of the motor can also control the main working circuit, and supply power to the outer rotor coil in reverse, realize the connection between the external power grid and the outer rotor coil, greatly increase the torque of the electromagnetic speed regulating motor, and can exceed the actual speed.
  • the rated speed of the motor can also control the main working circuit, and supply power to the outer rotor coil in reverse, realize the connection between the external power grid and the outer rotor coil, greatly increase the torque of the electromagnetic speed regulating motor, and can exceed the actual speed.
  • the rated speed of the motor can also control the main working circuit, and supply power to the outer rotor coil in reverse, realize the connection between the external power grid and the outer rotor coil, greatly increase the torque of the electromagnetic speed regulating motor, and can exceed the actual speed.
  • Figure 1 is a front view of the present invention
  • FIG. 2 is a schematic structural view of an outer rotor assembly according to the present invention.
  • Figure 3 is a side view of the outer rotor assembly of the present invention.
  • Figure 4 is a schematic structural view of an inner rotor assembly of the present invention.
  • Figure 5 is a radial cross-sectional view of the inner rotor assembly of the present invention.
  • Figure 6 is a schematic structural view of a base of the present invention.
  • Figure 7 is a schematic structural view of a cooling system of the present invention.
  • Figure 8 is a schematic structural view of a control system in the present invention.
  • Figure 9 is a schematic structural view of the present invention.
  • the electromagnetic coupling principle is a known technique, and the outer rotor coil and the stator coil and the corresponding stator core, outer rotor core, inner rotor core, and PWM control circuit are all known techniques;
  • the high-power electromagnetic speed regulating motor provided in this embodiment is provided with an active device and a driven device inside the motor casing 1 along the length thereof, and the active device is composed of a non-rotating stator assembly 2 and a rotating inner rotor assembly 3.
  • the driven device includes an outer rotor assembly 4, wherein the rotating inner rotor assembly 3 includes a first inner rotor 9 and a second inner rotor 10, a first inner rotor 9 and a stator assembly 2, a second inner rotor 10 and an outer rotor
  • the components 4 each have a rotational gap therebetween, the first inner rotor 9 and the stator assembly 2 electromagnetically transmit torque, and the second inner rotor 10 and the outer rotor assembly 4 electromagnetically transmit torque.
  • the stator assembly 2 includes a stator core 6 fixed to the motor casing 1, and a stator coil 7 is disposed along the longitudinal direction of the stator core 6, and the stator coil 7 is connected to an external power grid;
  • the inner rotor assembly 3 includes a drive shaft 8 that is fixedly coupled to the motor housing 1 via bearings, and a first inner rotor 9 and a second inner rotor 10, a first inner rotor 9 and a second, are sequentially disposed along the longitudinal direction of the drive shaft 8.
  • the inner rotor 10 is a squirrel-cage rotor, and the first inner rotor 9 corresponds to the stator core 6, and the stator coil 7 is energized by an external power grid, and the first inner rotor 9 is driven to rotate by electromagnetic coupling torque, and finally the drive shaft 8 is rotated.
  • the outer rotor assembly 4 includes a driven shaft 11 that is fixed to the motor casing 1 through a bearing, and a rotor core frame 12 is disposed at one end of the driven shaft 11 near the second inner rotor 10, and the rotor core frame 12 is provided
  • An outer rotor core 13 corresponding to the second inner rotor 10 is disposed around the outer rotor core 13 in the longitudinal direction, and the second inner rotor 10 and the outer rotor core 13 are electromagnetically coupled.
  • the driven shaft 11 is rotated, and the outer rotor coil 14 is connected to the outer rotor coil junction box 33 via a slip ring 15 provided on the driven shaft 11.
  • the first inner rotor 9 includes an inner rotor core 16 sleeved on the drive shaft 8 and stacked with a thickness of cold-rolled silicon steel sheets.
  • the first inner rotor 9 and the second inner rotor 10 have the same structure, and the inner rotor cores are
  • the core 16 is internally inserted with a guide bar 5 and an insulating guide bar 57 for use with the guide bar 5, and each of the bars 5 passes through the first inner rotor 9 and the second inner rotor 10 at the same time, and is provided at both ends of the guide bar 5
  • the end ring conductor 17 connects the two inner rotor cores 16 together through the end ring conductor 17 and the bar 5, and the bar 5 is disposed between the two inner rotor cores 16 and is provided with a guide strip pretensioning band 56. Setting the guide pretension belt can prevent the guide bar from rotating at high speed.
  • the minimum distance between the first inner rotor 9 and the second inner rotor 10 in the axial direction is L, and the L dimension is 200 mm.
  • the one end of the driven shaft 11 near the driving shaft 8 is provided with a mounting hole 18, and the mounting hole 18 is provided therein.
  • the transition bearing 19, the outer ring of the transition bearing 19 cooperates with the driven shaft 11, and the inner ring cooperates with the driving shaft 8;
  • the electromagnetic speed regulating motor is provided with a bearing temperature measuring probe 20, and the speed measuring gear 21 is provided on the driven shaft 11 and
  • a speed measuring probe 22 fixed to the motor casing 1 and used for measuring the rotational speed is provided with a moisture-proof heater 31 inside the motor casing 1.
  • a cooling system is disposed inside the motor casing 1.
  • the cooling system is composed of an inner circulation device and a outer circulation device.
  • the motor casing 1 includes a base 101 and a casing 102 disposed at an upper end of the base 101.
  • the active device and the driven device are disposed on the base 101. in;
  • the outer circulation device includes a casing 102.
  • the casing 102 has an L shape.
  • a fan cover 103 for placing a fan is disposed at one end of the casing 102 in the longitudinal direction, and a heat exchange tube 23 is disposed inside the casing 102 along the longitudinal direction thereof.
  • One end of the tube 23 communicates with the inside of the fan cover 103, and the other end communicates with the outside.
  • An outer circulation fan 24 is disposed outside the base shaft 101 of the driving shaft 8, and the outer circulation fan 24 is disposed inside the fan cover 103;
  • the inner circulation device includes an inner circulation first fan 25 and an inner circulation second fan 26, and an inner circulation first fan 25 is disposed at an end of the drive shaft 8 adjacent to the outer circulation fan 24, and the driven shaft 11 is close to the rotor core skeleton 12
  • One end is provided with an inner circulation second fan 26, and the drive shaft 8 is provided with a spline boss 27 along its circumferential direction.
  • the first inner rotor 9 and the second inner rotor 10 are provided with grooves matching the spline boss 27. 28, and a first air duct 29 is disposed between the first inner rotor 9, the second inner rotor 10 and the driving shaft 8, and a vent hole 30 is disposed on the iron core frame 12, and the second fan 26 is internally circulated through the vent hole 30.
  • the air duct 29 is in communication, and the internal hot air is circulated to the second fan 26 by the inner circulation first fan 25, and then the inner air circulation second fan 26 diffuses the hot air to the upper end heat exchange tube 23, and the heat exchange tube 23 passes through the outer tube.
  • the low temperature wind uses the temperature difference between the inner and outer winds to perform heat exchange to achieve the purpose of cooling the interior of the base 101.
  • the outer circulation fan 24 and the inner circulation second fan 26 adopt a centrifugal fan, and the inner circulation first fan 25 uses an axial flow fan. , wherein the shaft power of the inner fan second fan 26 is set 2 times the power of the circulation of the first fan shaft 25.
  • the control system of the electromagnetic speed regulating motor comprises a main controller 32, an outer rotor coil junction box 33 disposed on the motor casing 1, a feedback electric junction box 34, a grid junction box 35, a feedback electric junction box 34 and an internal circuit of the grid junction box 35.
  • the wires are connected in parallel first, and then connected to the stator coil 7, and a main working circuit is arranged between the outer rotor coil junction box 33 and the feedback power junction box 34;
  • the main working circuit includes a main breaker 36, an outer rotor side filter 37, an outer rotor side converter circuit 38, a stator side converter circuit 39, a stator side filter 40, a low voltage switch cabinet 41, and a step-up transformer 42 which are sequentially connected in series. And high voltage switch cabinet 43;
  • a voltage anti-jamming device 44 for preventing low voltage interference of the power grid is connected between the outer rotor side converter circuit 38 and the outer rotor side filter 37, and the outer rotor side converter circuit 38 and the stator side converter circuit 39 are one.
  • the outer rotor side converter circuit 38 and the stator side converter circuit 39 are one.
  • An auxiliary working circuit is further disposed on the side of the outer rotor coil junction box 33, the auxiliary working circuit is arranged in parallel with the main working circuit, and the auxiliary working circuit comprises an auxiliary circuit breaker 45 and a resistance adjuster 46 connected in series with the outer rotor coil junction box 33;
  • the control terminals of the main breaker 36, the outer rotor side converter circuit 38, the low voltage switch cabinet 41, the high voltage switch cabinet 43, the auxiliary breaker 45 and the resistance regulator 46 are all connected to the main controller 32, and the main controller 32 and the grid phase
  • the detector 47 is connected so as to be able to accept the phase signal of the grid.
  • the method of using the control system of the electromagnetic speed control motor is as follows:
  • Step 1 Electromagnetic speed-regulating motor starting method: first disconnect the main breaker 36, the auxiliary breaker 45 and the low-voltage switch cabinet 41, turn off the moisture-proof heater 31 for 10 minutes, then turn off, and then the grid junction box 35 is connected to the grid.
  • the stator coil 7 starts to pass current, and the induced magnetic field of the power frequency change is established in the stator core 6.
  • the induced current is also generated in the bar 5, and the driving shaft 8 is continuously accelerated under the action of the induced current, and reaches the rated state after 5s.
  • the current is such that the speed of the driven shaft 11 is continuously increased until the speed required to meet the process requirements is reached, and the electric energy generated by the slip of the outer rotor coil 14 is converted into the same electric energy as the grid voltage, frequency and phase through the conversion of the main control loop.
  • Stator coil 7 Stator coil 7;
  • Step 2 The electromagnetic speed regulating motor enters the normal adjustment method; when the user demand indicates that the rotation speed needs to be increased, the main controller 32 controls the current of the outer rotor coil 14 to increase by increasing the duty ratio of the outer rotor side converter circuit until the requirement is met. When the user demand indicates that the rotation speed needs to be reduced, the main controller 32 controls the current of the outer rotor coil 14 to decrease by reducing the duty ratio of the outer rotor side converter circuit until the demand is satisfied, and the duty ratio is 40%. At the same time, the electric energy emitted by the outer rotor coil 14 is converted into the stator coil 7 by the conversion of the main control loop into the same electrical energy as the grid voltage, frequency and phase;
  • Step 3 When the main breaker 36, the outer rotor side filter 37, the outer rotor side converter circuit 38, the stator side converter circuit 39, the stator side filter 40, the low voltage switch cabinet 41, the step-up transformer 42 and the high voltage switch cabinet 43
  • the main controller 32 immediately controls the opening and closing of the main breaker 36 and the low voltage switchgear 41, the auxiliary breaker 45 is turned on, and the resistor regulator 46 and the outer rotor coil 14 form a closed loop.
  • the controller 32 controls the resistance adjuster 46 to adjust the resistance in the loop to adjust the current of the outer rotor coil 14, thereby adjusting the output rotational speed and torque of the outer rotor coil 14, at which time the electrical energy emitted by the outer rotor coil 14 is passed through the resistor.
  • the resistance of the regulator 46 is dissipated by heat generation;
  • Step 4 Shutdown method: The main controller 32 disconnects the switches that control the main breaker 36, the auxiliary breaker 45, and the low-voltage switchgear 41, and then the grid junction box 35 is disconnected from the grid, while controlling the moisture-proof heater 31 to energize and maintain the electromagnetic The internal temperature and insulation of the speed control motor.
  • the control system of the electromagnetic speed regulating motor comprises a rotation speed detecting junction box 49 disposed on the motor casing 1, a transition bearing refueling window 50, a bearing temperature measuring junction box 51, an outer rotor coil junction box 33, a coil temperature measuring junction box 52, and a moisture proof heating Connector box 53, feedback junction box 34, grid junction box 35, stator coil temperature probe 48, outer rotor coil temperature probe 54, collector ring maintenance cover 55;
  • the ring 15, the stator coil temperature measuring probe 48, the outer rotor coil temperature measuring probe 54, and the moisture proof heater 31, and the feedback ports of the above various detecting instruments are all connected to the main controller 32.
  • the technical solution of the present embodiment is the same as that of the first embodiment, wherein the L dimension is 500 mm, and the shaft power of the inner circulation second fan 26 is designed as the inner circulation first fan 25. 4 times the shaft power, the method of using the control system of the electromagnetic speed control motor is as follows:
  • Step 1 Electromagnetic speed-regulating motor starting method: first disconnect the main breaker 36, the auxiliary breaker 45 and the low-voltage switch cabinet 41, turn off the moisture-proof heater 31 for 15 minutes, then turn off, and then the grid junction box 35 is connected to the grid.
  • the stator coil 7 starts to pass current, and the induced magnetic field of the power frequency change is established in the stator core 6.
  • the induced current is also generated in the bar 5, and the driving shaft 8 is continuously accelerated under the action of the induced current, and reaches the rated state after 20s.
  • the current is such that the speed of the driven shaft 11 is continuously increased until the speed required to meet the process requirements is reached, and the electric energy generated by the slip of the outer rotor coil 14 is converted into the same electric energy as the grid voltage, frequency and phase through the conversion of the main control loop.
  • Stator coil 7 Stator coil 7;
  • Step 2 The electromagnetic speed regulating motor enters a normal adjustment method; when the user demand indicates that the rotation speed needs to be increased, the main controller 32 controls the current of the outer rotor coil 14 to increase by increasing the duty ratio of the outer rotor side converter circuit 38 until it is satisfied. When the user demand indicates that the rotation speed needs to be lowered, the main controller 32 controls the current of the outer rotor coil 14 to decrease by reducing the duty ratio of the outer rotor side converter circuit 38 until the demand is satisfied, and the duty ratio is 50. %, at the same time, the electric energy emitted by the outer rotor coil 14 is converted into the stator coil 7 by the conversion of the main control loop into the same electrical energy as the grid voltage, frequency and phase;
  • Step 3 When the main breaker 36, the outer rotor side filter 37, the outer rotor side converter circuit 38, the stator side converter circuit 39, the stator side filter 40, the low voltage switch cabinet 41, the step-up transformer 42 and the high voltage switch cabinet 43
  • the main controller 32 immediately controls the opening and closing of the main breaker 36 and the low voltage switchgear 41, the auxiliary breaker 45 is turned on, and the resistor regulator 46 and the outer rotor coil 14 form a closed loop.
  • the controller 32 controls the resistance adjuster 46 to adjust the resistance in the loop to adjust the current of the outer rotor coil 14, thereby adjusting the output rotational speed and torque of the outer rotor coil 14, at which time the electrical energy emitted by the outer rotor coil 14 is passed through the resistor.
  • the resistance of the regulator 46 is dissipated by heat generation;
  • Step 4 Shutdown method: The main controller 32 disconnects the switches that control the main breaker 36, the auxiliary breaker 45, and the low-voltage switchgear 41, and then the grid junction box 35 is disconnected from the grid, while controlling the moisture-proof heater 31 to energize and maintain the electromagnetic The internal temperature and insulation of the speed control motor.
  • the technical solution of the present embodiment is the same as that of the first embodiment, wherein the L dimension is 2000 mm, and the shaft power of the inner circulation second fan 26 is designed as the inner circulation first fan 25. 5 times the shaft power, the method of using the control system of the electromagnetic speed control motor is as follows:
  • Step 1 Electromagnetic speed-regulating motor starting method: first disconnect the main breaker 36, the auxiliary breaker 45 and the low-voltage switch cabinet 41, turn off the moisture-proof heater 31 for 12 minutes, then turn off, and then the grid junction box 35 is connected to the grid.
  • the stator coil 7 starts to pass current, and the induced magnetic field of the power frequency change is established in the stator core 6.
  • the induced current is also generated in the bar 5, and the driving shaft 8 is continuously accelerated under the action of the induced current, and reaches the rated state after 10s.
  • the current is such that the speed of the driven shaft 11 is continuously increased until the speed required to meet the process requirements is reached, and the electric energy generated by the slip of the outer rotor coil 14 is converted into the same electric energy as the grid voltage, frequency and phase through the conversion of the main control loop.
  • Stator coil 7 Stator coil 7;
  • Step 2 The electromagnetic speed regulating motor enters a normal adjustment method; when the user demand indicates that the rotation speed needs to be increased, the main controller 32 controls the current of the outer rotor coil 14 to increase by increasing the duty ratio of the outer rotor side converter circuit 38 until it is satisfied. When the user demand indicates that the rotation speed needs to be lowered, the main controller 32 controls the current of the outer rotor coil 14 to decrease by reducing the duty ratio of the outer rotor side converter circuit 38 until the demand is satisfied, and the duty ratio is 60. %, at the same time, the electric energy emitted by the outer rotor coil 14 is converted into the stator coil 7 by the conversion of the main control loop into the same electrical energy as the grid voltage, frequency and phase;
  • Step 3 When the main breaker 36, the outer rotor side filter 37, the outer rotor side converter circuit 38, the stator side converter circuit 39, the stator side filter 40, the low voltage switch cabinet 41, the step-up transformer 42 and the high voltage switch cabinet 43
  • the main controller 32 immediately controls the opening and closing of the main breaker 36 and the low voltage switchgear 41, the auxiliary breaker 45 is turned on, and the resistor regulator 46 and the outer rotor coil 14 form a closed loop.
  • the controller 32 controls the resistance adjuster 46 to adjust the resistance in the loop to adjust the current of the outer rotor coil 14, thereby adjusting the output rotational speed and torque of the outer rotor coil 14, at which time the electrical energy emitted by the outer rotor coil 14 is passed through the resistor.
  • the resistance of the regulator 46 is dissipated by heat generation;
  • Step 4 Shutdown method: The main controller 32 disconnects the switches that control the main breaker 36, the auxiliary breaker 45, and the low-voltage switchgear 41, and then the grid junction box 35 is disconnected from the grid, while controlling the moisture-proof heater 31 to energize and maintain the electromagnetic The internal temperature and insulation of the speed control motor.

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Abstract

本发明公开了一种大功率电磁调速电机，包括电机外壳,在电机外壳内部且沿其长度方向设有主动装置和从动装置，主动装置由不转动的定子组件和转动的内转子组件组成；从动装置包括外转子组件，其中转动的内转子组件包括第一内转子和第二内转子，第一内转子与定子组件之间、第二内转子与外转子组件之间均具有转动间隙，第一内转子与定子组件进行电磁耦合传递扭矩，第二内转子与外转子组件进行电磁耦合传递扭矩。本发明结构简单，可靠性高，操作方便、具有软启动的功能，同时能够根据实际需要对电机的输出扭矩和转速进行调节，降低电机的工作电流，实现节能的效果，并且能够将外转子组件和第二内转子之间的转差形成的能量差转化成电能重新输送至电网输入端进行电能补偿，进一步提高节能效果。

Description

一种大功率电磁调速电机 技术领域
本发明涉及电机，具体的说是一种大功率电磁调速电机。
背景技术
在冶金、石油、化工、电力、水泥建材、水务和机械等行业中存在泵、风机和压缩机以及其它机械装置等大功率负载，他们的原动机一般为三相异步电动机。这些装置的动力一般都按满产设计并设置一定富余容量，而实际工作一般都很少工作在满产状态。
传统的装置都是用普通的电机通过联轴器连接水泵、风机和压缩机，由于普通的电机不具有调速能力，工作时电机和水泵均以额定转速旋转，通过泵的阀门或者风门挡板进行节流调节，节流调节的节能效率非常低，造成这些装置的实际工作能耗高于理想工作能耗(所有装置均达到理论最高工作效率的能耗)。
有效的解决办法就是对电机进行调速，根据现场的实际需要改变电机的转速达到现场的需要，同时起到调节用户需求和节能的双重目的。现有的主要调速手段有调速型液力耦合器、变频器和调速型永磁耦合器等。
调速型液力耦合器以液体作为工作介质传递扭矩，其具有一定的无级调速功能。液力耦合器调速具有无级调速、不改变供电频率、减少启动冲击和启动负荷和不产生谐波污染的优点。但调速型液力耦合器具有效率低、具有液压油污染环境、使用成本较高和维护不方便的缺点，在重视节能环保的今天，只有少数用户选择使用，具有逐渐退出市场的趋势。
变频器是利用电力电子技术改变电网工作频率来改变三相异步电动机转速的一种调速技术。变频器具有效率和调速精度高、调速响应快和软启动等优点和功能，在自动控制领域和电机调速节能领域具有广泛的应用。但变频器具有系统复杂、可靠性低、维护难度大、使用和维护费用高、会产生电网谐波污染、对工作环境要求高和抗干扰能力弱等缺点，限制了一些用户的使用，特别是一些冶金、石油、化工、电力和水泥建材等工作环境比较恶劣的用户。
调速型永磁耦合器是近几年发展起来的一种新型调速技术，其利用永磁与导体相对运动产生的感应力和感应转矩传递动力并利用调节磁通量的方式调节转矩。调速型永磁耦合器具有效率较高、结构简单可靠、使用和维护低、不产生谐波污染和抗干扰能力强的优点。但相对于变频器其调速精度和响应速度比变频器低，这极大的限制了其在自动控制领域的应用；同时调速型永磁耦合器低速运行时还具有效率低和发热比较严重的缺陷。由于冶金、石油、化工、电力、水泥建材、水务和部分机械行业对转速精度和响应速度要求不十分高，因此调 速型永磁耦合器以其优点获得了一定的市场和用户认可。
随着社会的发展，节能环保越来越受到社会的重视，特别是电机节能领域，据统计2016年全国冶金、石油、化工、电力、水泥建材和水务等行业的风机、水泵和压缩机用电量超过30000亿千瓦时，还具有15％的节点潜力，风机、水泵和压缩机的年节点潜力高达4500亿千瓦时。但上述调速型液力耦合器、变频器和调速型永磁耦合器均因为其各自的局限性难以完全满足用户电机调速节能的需求。
发明内容
本发明所要解决的技术问题是，针对以上现有技术的缺点，提出一种大功率电磁调速电机，不仅结构简单，操作方便，还具有软启动的功能，能够对电机的输出扭矩和转速进行调节，降低电机的工作电流，实现节能的效果，并且能够将转速差形成的能量差转化与电网同频同相位的电能重新输送至电网输入端共同向电机供电，进一步实现节能作用。
为了解决上述技术问题，本发明的技术方案是通过以下方式实现的：一种大功率电磁调速电机，包括电机外壳,在电机外壳内部且沿其长度方向设有主动装置和从动装置，主动装置由不转动的定子组件和转动的内转子组件组成；从动装置包括外转子组件，其中转动的内转子组件包括第一内转子和第二内转子，第一内转子与定子组件之间、第二内转子与外转子组件之间均具有转动间隙，第一内转子与定子组件进行电磁耦合传递扭矩，第二内转子与外转子组件进行电磁耦合传递扭矩。
本发明进一步限定的技术方案是：
前述的大功率电磁调速电机，定子组件包括与电机外壳固定的定子铁芯，沿定子铁芯长度方向绕设有定子线圈，定子线圈与外部电网连接；
内转子组件包括主动轴，主动轴通过轴承与电机外壳连接固定，沿主动轴长度方向依次设有第一内转子和第二内转子，第一内转子和第二内转子均为鼠笼转子，第一内转子与定子铁芯对应，通过外部电网向定子线圈通电，利用电磁耦传递扭矩驱动第一内转子转动，最终使主动轴同步转动。
前述的大功率电磁调速电机，外转子组件包括从动轴，从动轴通过轴承与电机外壳固定，在从动轴靠近第二内转子的一端设有转子铁芯骨架，转子铁芯骨架上设有与第二内转子对应的外转子铁芯，沿外转子铁芯长度方向绕设有外转子线圈，第二内转子与外转子铁芯之间进行电磁耦合，从而带动从动轴转动，外转子线圈通过设置在从动轴上的集电环与外转子线圈 接线箱连接。
前述的大功率电磁调速电机，第一内转子包括套设在主动轴上且由多个冷轧硅钢片叠成一定厚度的内转子铁芯，第一内转子与第二内转子结构相同，在两个内转子铁芯内部穿插有多个导条以及与导条配合使用的绝缘导条，每个导条同时穿过第一内转子与第二内转子，在导条的两端设有端环导体，通过端环导体及导条将两个内转子铁芯连成一个整体，导条位于两个内转子铁芯之间套设有导条预紧带。
前述的大功率电磁调速电机，第一内转子和第二内转子之间轴向方向的最小距离为L,且L尺寸大于200mm，从动轴靠近主动轴的一端设有安装孔，安装孔中设有过渡轴承，过渡轴承的外圈与从动轴配合，内圈与主动轴配合；电磁调速电机中设有多个轴承测温探头，在从动轴上设有测速齿轮以及固定在电机外壳上且用于测量转速的测速探头，电机外壳内部设有防潮加热器。
前述的大功率电磁调速电机，在电机外壳内部设有冷却系统，冷却系统由内循环装置和外循环装置组成，电机外壳包括底座和设置在底座上端的罩壳，主动装置和从动装置均设置在底座中；
外循环装置包括罩壳，罩壳呈L形状，沿罩壳长度方向一端设有用于放置风机的风机罩，在罩壳内部沿其长度方向设有多个换热管，换热管一端与风机罩内部连通，另一端与外部连通，在主动轴位于底座外侧设有外循环风机，外循环风机设置在风机罩内部；
内循环装置包括内循环第一风机、内循环第二风机，在主动轴靠近外循环风机的一端设置内循环第一风机，在从动轴靠近远离转子铁芯骨架的一端设有内循环第二风机，主动轴沿其圆周方向设有多个花键凸台，第一内转子、第二内转子上设有与花键凸台相配合的凹槽，且第一内转子、第二内转子与主动轴之间设有风道，在铁芯骨架上设有通风孔，通过通风孔将内循环第二风机与风道连通，通过内循环第一风机将内部热风向内循环第二风机扩散，然后内循环第二风机将热风向上端的换热管扩散，换热管管内通过的是外部的低温风，利用内外风的温度差进行热交换，实现底座内部降温的的目的，其中内循环第二风机的轴功率设计为内循环第一风机的轴功率的2倍或2倍以上以上。
前述的大功率电磁调速电机，电磁调速电机的控制系统包括主控制器、设置在电机外壳上的外转子线圈接线箱、回馈电接线箱、电网接线箱，回馈电接线箱和电网接线箱内部电路通过导线先并联，然后再与定子线圈相连，外转子线圈接线箱与回馈电接线箱之间设有主工 作回路；
主工作回路包括依次串联连接的主断路器、外转子侧滤波器、外转子侧变流电路、定子侧变流电路、定子侧滤波器、低压开关柜、升压变压器和高压开关柜；
在外转子侧变流电路与外转子侧滤波器之间接入用于防止电网低电压干扰低的电压抗干扰器，外转子侧变流电路和定子侧变流电路为一对对称的PWM控制电路，能够实现可控的双向导通供电；
在外转子线圈接线箱侧还设有辅助工作回路，辅助工作回路与主工作回路并联设置，辅助工作回路包括与外转子线圈接线箱依次串联的辅助断路器和电阻调节器；
主断路器、外转子侧变流电路、低压开关柜、高压开关柜、辅助断路器和电阻调节器的控制端均与主控制器连接，主控制器与电网相位检测仪连接，从而能接受电网的相位信号。
前述的大功率电磁调速电机，电机外壳上设有转速检测接线盒、过渡轴承加油窗、轴承测温接线箱、外转子线圈接线箱、线圈测温接线盒、防潮加热器接线箱、回馈电接线箱、电网接线箱、定子线圈测温探头、外转子线圈测温探头、集电环维护罩；
所述转速检测接线盒、轴承测温接线箱、外转子线圈接线箱、线圈测温接线盒、防潮加热器接线箱、通过导线分别与测速探头、轴承测温探头、集电环、定子线圈测温探头、外转子线圈测温探头、防潮加热器，且以上所述的各种检测仪器的反馈端口均与主控制器连接
前述的大功率电磁调速电机，电磁调速电机的控制系统的使用方法按以下步骤进行：
步骤1：电磁调速电机开机方法：先将主断路器、辅助断路器和低压开关柜断开，将防潮加热器通电10-15分钟后关断，然后电网接线箱接通电网通电，定子线圈中开始通过电流，定子铁芯中建立起工频变化的感应磁场，导条中也相应产生感应电流，在感应电流的作用下，主动轴不断加速，5-20s后达到额定转速，此时从动轴转速为0；然后主断路器和低压开关柜的开关闭合，主控制器通过控制外转子线圈中的电流进而控制定子线圈的电流不超过其额定电流，使从动轴转速不断提高直至达到满足工艺要求的转速为止，同时外转子线圈转差所发出的电能通过主控制回路的转换变成与电网电压、频率和相位相同的电能回馈到定子线圈；
步骤2：电磁调速电机进入正常调节的方法；当用户需求提示转速需要提高时，主控制器通过提高外转子侧变流电路的暂载率控制外转子线圈的电流增大直到满足需要为止；当用户需求提示转速需要降低时，主控制器通过降低外转子侧变流电路的暂载率控制外转子线圈的 电流减小直到满足需要为止，同时外转子线圈转差所发出的电能通过主控制回路的转换变成与电网电压、频率和相位相同的电能回馈到定子线圈；
步骤3：当主断路器、外转子侧滤波器、外转子侧变流电路、定子侧变流电路、定子侧滤波器、低压开关柜、升压变压器和高压开关柜构成的主控制回路出现故障时，主控制器立即控制主断路器和低压开关柜的开关断开，辅助断路器接通，电阻调节器与外转子线圈构成封闭回路，主控制器控制电阻调节器调节回路中电阻，从而来调节外转子线圈的电流，进而调节外转子线圈的输出转速和转矩，此时外转子线圈转差所发出的电能通过电阻调节器的电阻发热耗散掉；
步骤4：停机方法：主控制器将控制主断路器、辅助断路器和低压开关柜的开关断开，然后电网接线箱与电网断开，同时控制防潮加热器通电保持电磁调速电机的内部温度和绝缘。
本技术方案的与现有技术的区别：
本技术方案中的电磁调速电机中设置主动装置和从动装置，电机启动时通过主控制器控制外转子线圈中的电流可控的增大，能够实现电机的软启动，再通过调节外转子线圈的电流从而逐步增加扭矩和转速，使电流逐步增大，最终达到所需输出转速，减小较高的启动电流对电网和定子线圈的的冲击，减小设备启动对电网的干扰并延长设备的使用寿命，而且在起动过程中具有发热量小、工作效率高、能量损耗小和节能的作用；
在实际操作过程中通过可根据工况要求进行调节输出转速，从而降低电机的实际工作电流，并且工作电流经常会远远小于额定电流，不仅操作方便，而且节电效果显著，节约用电；
在电机工作中：当外转子线圈与第二内转子之间产生电流时，该电磁耦合器所发出的电可以通过外转子侧变流电路、定子侧变流电路和升压变压器整流逆变升压后与电网同时向定子线圈供电，可以进一步降低电机从电网取电的电流和有功功率，起到提高节电空间的效果。
本发明的设备在任何转速条件下的调速部分的工作效率均超过且随输出转速的变化时变化不大，同时本技术方案中的冷却系统、由内循环装置和外循环装置组成，通过内循环与外循环之间的热量传递，降低电机内部的温度，降温效果显著，同时本技术方案中在主动轴上设置花键凸台，进而设置风道，能够在主动轴转动时，使主动装置内部均有流动的空气，带走大量的热量，再与换热管产生作用，进行热交换，降低内部温度，降温效果明显，结构简单，操作方便，安全可靠；
综上，本发明的设备的节能率和工作效率相比于普通电机、调速型液力耦合器和调速型永磁耦合器的工作效率均高得多，比变频器的工作效率还略高。由于设备的工作效率高，使 本发明的设备的发热量小。
该电磁调速电机结构简单、可靠性高、制造成本低，本技术方案由通用的机械结构组成，零部件少，跟普通电机、液力耦合器和磁力耦合器相当，都属于机械装置，相比于成千上万个零部件的变频器相比结构简单得多，相应的可靠性也大为提高，同时相比当前比较流行的调速型永磁耦合器，没有用到价格昂贵的永磁材料，使得设备的成本明显降低。
而且不需要专门的油路、水冷或者风冷系统，使用和维护费用低。本发明的装置在使用过程中不需要使用液压油、冷却水和冷却油等工作介质或者冷却装置，不需要风机、水泵和油泵的辅助设备耗能，因此本发明使用费用低。同时本发明不要像变频器一样定期更换功率元器件和也不要像液力耦合器一样维护时更换液压油，因此本发明的维护费用也很低；
抗干扰能力强，本发明的控制系统的发电功率只有电机总功率的15％以内，不需要向变频器一样涉及到若干个功率元器件的串并联，干扰因素较少，且主供电系统没有改变，即时有外界干扰，对系统运行造成的影响极小；
当主控制回路出现故障时，主断路器和低压开关柜的开关断开，辅助断路器接通，电阻调节器与外转子线圈构成封闭回路，控制器控制电阻调节器调节回路中电阻，从而调节外转子线圈的电流，进而调节外转子线圈的输出转速和转矩，逐步降低转速，避免产生不必好的安全事故，提高装置的可靠性和安全性；
具有软启动、过载保护和带电停机的能力。本发明的电机和调速装置启动时，控制系统可以逐渐增大外转子线圈的电流，使从动轴扭矩逐渐增大，逐渐加大到所需扭矩和负载转速，达到软启动的效果，当系统过载时，控制系统可以减小外转子线圈的电流起到保护系统的作用，当负载出现故障时，控制系统可以切断转子线圈的电流，使输出转矩为0，达到带电停机的功能；
同时在特定的工艺要求下，本技术方案还能控制主工作回路，向外转子线圈反向供电，实现外部电网与外转子线圈连接，大大增加电磁调速电机的扭矩，并且能够将实际转速超过电机的额定转速。
附图说明
图1为本发明的主视图；
图2为本发明中外转子组件的结构示意图；
图3为本发明中外转子组件的侧视图；
图4为本发明中内转子组件的结构示意图；
图5为本发明中内转子组件的径向剖视图；
图6为本发明中底座的结构示意图；
图7为本发明冷却系统的结构示意图；
图8为本发明中控制系统的结构示意图；
图9为本发明的结构示意图；
其中1-电机外壳，101-底座，102-罩壳，103-风机罩，2-定子组件，3-内转子组件，4-外转子组件，5-导条，6-定子铁芯，7-定子线圈，8-主动轴，9-第一内转子，10-第二内转子，11-从动轴，12-转子铁芯骨架，13-外转子铁芯，14-外转子线圈，15-集电环，16-内转子铁芯，17-端环导体，18-安装孔，19-过渡轴承，20-轴承测温探头，21-测速齿轮，22-测速探头，23-换热管，24-外循环风机，25-内循环第一风机，26-内循环第二风机，27-花键凸台，28-凹槽，29-风道，30-通风孔，31-防潮加热器，32-主控制器，33-外转子线圈接线箱，34-回馈电接线箱，35-电网接线箱，36-主断路器，37-外转子侧滤波器，38-外转子侧变流电路，39-定子侧变流电路，40-定子侧滤波器，41-低压开关柜，42-升压变压器，43-高压开关柜，44-电压抗干扰器，45-辅助断路器，46-电阻调节器，47-电网相位检测仪，48-定子线圈测温探头，49-转速检测接线盒，50-过渡轴承加油窗，51-轴承测温接线箱，52-线圈测温接线盒，53-防潮加热器接线箱，54-外转子线圈测温探头，55-集电环维护罩,56-导条预紧带，57-绝缘导条。
具体实施方式
下面对本发明做进一步的详细说明：其中电磁耦原理为已知技术，外转子线圈和定子线圈以及相应的定子铁芯、外转子铁芯、内转子铁芯、PWM控制电路均为已知技术；
实施例1
本实施例提供的一种大功率电磁调速电机，在电机外壳1内部且沿其长度方向设有主动装置和从动装置，主动装置由不转动的定子组件2和转动的内转子组件3组成；从动装置包括外转子组件4，其中转动的内转子组件3包括第一内转子9和第二内转子10，第一内转子9与定子组件2之间、第二内转子10与外转子组件4之间均具有转动间隙，第一内转子9与定子组件2进行电磁耦合传递扭矩，第二内转子10与外转子组件4进行电磁耦合传递扭矩。
定子组件2包括与电机外壳1固定的定子铁芯6，沿定子铁芯6长度方向绕设有定子线圈7，定子线圈7与外部电网连接；
内转子组件3包括主动轴8，主动轴8通过轴承与电机外壳1连接固定，沿主动轴8长度方向依次设有第一内转子9和第二内转子10，第一内转子9和第二内转子10均为鼠笼转子，第一内转子9与定子铁芯6对应，通过外部电网向定子线圈7通电，利用电磁耦传递扭矩驱动第一内转子9转动，最终使主动轴8转动。
外转子组件4包括从动轴11，从动轴11通过轴承与电机外壳1固定，在从动轴11靠近第二内转子10的一端设有转子铁芯骨架12，转子铁芯骨架12上设有与第二内转子10对应的外转子铁芯13，沿外转子铁芯13长度方向绕设有外转子线圈14，第二内转子10与外转子铁芯13之间进行电磁耦合，从而带动从动轴11转动，外转子线圈14通过设置在从动轴11上的集电环15与外转子线圈接线箱33连接。
第一内转子9包括套设在主动轴8上且由冷轧硅钢片叠成一定厚度的内转子铁芯16，第一内转子9与第二内转子10结构相同，在两个内转子铁芯16内部穿插有导条5以及与导条5配合使用的绝缘导条57，每个导条5同时穿过第一内转子9与第二内转子10，在导条5的两端设有端环导体17，通过端环导体17及导条5将两个内转子铁芯16连成一个整体，导条5位于两个内转子铁芯16之间套设有导条预紧带56，设置导条预紧带能够预防导条高速旋转变形。
第一内转子9和第二内转子10之间轴向方向的最小距离为L,且L尺寸为200mm，从动轴11靠近主动轴8的一端设有安装孔18，安装孔18中设有过渡轴承19，过渡轴承19的外圈与从动轴11配合，内圈与主动轴8配合；电磁调速电机中设有轴承测温探头20，在从动轴11上设有测速齿轮21以及固定在电机外壳1上且用于测量转速的测速探头22，电机外壳1内部设有防潮加热器31。
在电机外壳1内部设有冷却系统，冷却系统由内循环装置和外循环装置组成，电机外壳1包括底座101和设置在底座101上端的罩壳102，主动装置和从动装置均设置在底座101中；
外循环装置包括罩壳102，罩壳102呈L形状，沿罩壳102长度方向一端设有用于放置风机的风机罩103，在罩壳102内部沿其长度方向设有换热管23，换热管23一端与风机罩103内部连通，另一端与外部连通，在主动轴8位于底座101外侧设有外循环风机24，外循环风机24设置在风机罩103内部；
内循环装置包括内循环第一风机25、内循环第二风机26，在主动轴8靠近外循环风机24的一端设置内循环第一风机25，在从动轴11靠近远离转子铁芯骨架12的一端设有内循环第二风机26，主动轴8沿其圆周方向设有花键凸台27，第一内转子9、第二内转子10上设有与花键凸台27相配合的凹槽28，且第一内转子9、第二内转子10与主动轴8之间设有风道29，在铁芯骨架12上设有通风孔30，通过通风孔30将内循环第二风机26与风道29连通，通过内循环第一风机25将内部热风向内循环第二风机26扩散，然后内循环第二风机26将热风向上端的换热管23扩散，换热管23管内通过的是外部的低温风，利用内外风的温度差进行热交换，实现底座101内部降温的的目的，其中外循环风机24与内循环第二风机26采用离心式风机，内循环第一风机25采用轴流风机，其中内循环第二风机26的轴功率设计为内循环第一风机25的轴功率的2倍。
电磁调速电机的控制系统包括主控制器32、设置在电机外壳1上的外转子线圈接线箱33、回馈电接线箱34、电网接线箱35，回馈电接线箱34和电网接线箱35内部电路通过导线先并联，然后再与定子线圈7相连，外转子线圈接线箱33与回馈电接线箱34之间设有主工作回路；
主工作回路包括依次串联连接的主断路器36、外转子侧滤波器37、外转子侧变流电路38、定子侧变流电路39、定子侧滤波器40、低压开关柜41、升压变压器42和高压开关柜43；
在外转子侧变流电路38与外转子侧滤波器37之间接入用于防止电网低电压干扰低的电压抗干扰器44，所述外转子侧变流电路38和定子侧变流电路39为一对对称的PWM控制电路，能够实现可控的双向导通供电；
在外转子线圈接线箱33侧还设有辅助工作回路，辅助工作回路与主工作回路并联设置，辅助工作回路包括与外转子线圈接线箱33依次串联的辅助断路器45和电阻调节器46；
主断路器36、外转子侧变流电路38、低压开关柜41、高压开关柜43、辅助断路器45和电阻调节器46的控制端均与主控制器32连接，主控制器32与电网相位检测仪47连接，从而能接受电网的相位信号。
电磁调速电机的控制系统的使用方法按以下步骤进行：
步骤1：电磁调速电机开机方法：先将主断路器36、辅助断路器45和低压开关柜41断开，将防潮加热器31通电10分钟后关断，然后电网接线箱35接通电网通电，定子线圈7中开始通过电流，定子铁芯6中建立起工频变化的感应磁场，导条5中也相应产生感应电流，在感应电流 的作用下，主动轴8不断加速，5s后达到额定转速，此时从动轴11转速为0；然后主断路器36和低压开关柜41的开关闭合，主控制器32通过控制外转子线圈14中的电流进而控制定子线圈7的电流不超过其额定电流，使从动轴11转速不断提高直至达到满足工艺要求的转速为止，同时外转子线圈14转差所发出的电能通过主控制回路的转换变成与电网电压、频率和相位相同的电能回馈到定子线圈7；
步骤2：电磁调速电机进入正常调节的方法；当用户需求提示转速需要提高时，主控制器32通过提高外转子侧变流电路的暂载率控制外转子线圈14的电流增大直到满足需要为止；当用户需求提示转速需要降低时，主控制器32通过降低外转子侧变流电路的暂载率控制外转子线圈14的电流减小直到满足需要为止，该暂载率均为40％，同时外转子线圈14转差所发出的电能通过主控制回路的转换变成与电网电压、频率和相位相同的电能回馈到定子线圈7；
步骤3：当主断路器36、外转子侧滤波器37、外转子侧变流电路38、定子侧变流电路39、定子侧滤波器40、低压开关柜41、升压变压器42和高压开关柜43构成的主控制回路出现故障时，主控制器32立即控制主断路器36和低压开关柜41的开关断开，辅助断路器45接通，电阻调节器46与外转子线圈14构成封闭回路，主控制器32控制电阻调节器46调节回路中电阻，从而来调节外转子线圈14的电流，进而调节外转子线圈14的输出转速和转矩，此时外转子线圈14转差所发出的电能通过电阻调节器46的电阻发热耗散掉；
步骤4：停机方法：主控制器32将控制主断路器36、辅助断路器45和低压开关柜41的开关断开，然后电网接线箱35与电网断开，同时控制防潮加热器31通电保持电磁调速电机的内部温度和绝缘。
电磁调速电机的控制系统包括设置在电机外壳1上的转速检测接线盒49、过渡轴承加油窗50、轴承测温接线箱51、外转子线圈接线箱33、线圈测温接线盒52、防潮加热器接线箱53、回馈电接线箱34、电网接线箱35、定子线圈测温探头48、外转子线圈测温探头54、集电环维护罩55；
转速检测接线盒49、轴承测温接线箱51、外转子线圈接线箱33、线圈测温接线盒52、防潮加热器接线箱53、通过导线分别与测速探头22、轴承测温探头20、集电环15、定子线圈测温探头48、外转子线圈测温探头54、防潮加热器31，且以上的各种检测仪器的反馈端口均与主控制器32连接。
实施例2
本实施例提供的一种大功率电磁调速电机，本实施例的技术方案与实施例1相同，其中L尺寸为500mm，内循环第二风机26的轴功率设计为内循环第一风机25的轴功率的4倍，电磁调速电机的控制系统的使用方法按以下步骤进行：
步骤1：电磁调速电机开机方法：先将主断路器36、辅助断路器45和低压开关柜41断开，将防潮加热器31通电15分钟后关断，然后电网接线箱35接通电网通电，定子线圈7中开始通过电流，定子铁芯6中建立起工频变化的感应磁场，导条5中也相应产生感应电流，在感应电流的作用下，主动轴8不断加速，20s后达到额定转速，此时从动轴11转速为0；然后主断路器36和低压开关柜41的开关闭合，主控制器32通过控制外转子线圈14中的电流进而控制定子线圈7的电流不超过其额定电流，使从动轴11转速不断提高直至达到满足工艺要求的转速为止，同时外转子线圈14转差所发出的电能通过主控制回路的转换变成与电网电压、频率和相位相同的电能回馈到定子线圈7；
步骤2：电磁调速电机进入正常调节的方法；当用户需求提示转速需要提高时，主控制器32通过提高外转子侧变流电路38的暂载率控制外转子线圈14的电流增大直到满足需要为止；当用户需求提示转速需要降低时，主控制器32通过降低外转子侧变流电路38的暂载率控制外转子线圈14的电流减小直到满足需要为止，该暂载率均为50％，同时外转子线圈14转差所发出的电能通过主控制回路的转换变成与电网电压、频率和相位相同的电能回馈到定子线圈7；
步骤3：当主断路器36、外转子侧滤波器37、外转子侧变流电路38、定子侧变流电路39、定子侧滤波器40、低压开关柜41、升压变压器42和高压开关柜43构成的主控制回路出现故障时，主控制器32立即控制主断路器36和低压开关柜41的开关断开，辅助断路器45接通，电阻调节器46与外转子线圈14构成封闭回路，主控制器32控制电阻调节器46调节回路中电阻，从而来调节外转子线圈14的电流，进而调节外转子线圈14的输出转速和转矩，此时外转子线圈14转差所发出的电能通过电阻调节器46的电阻发热耗散掉；
步骤4：停机方法：主控制器32将控制主断路器36、辅助断路器45和低压开关柜41的开关断开，然后电网接线箱35与电网断开，同时控制防潮加热器31通电保持电磁调速电机的内部温度和绝缘。
实施例3
本实施例提供的一种大功率电磁调速电机，本实施例的技术方案与实施例1相同，其中L尺寸为2000mm，内循环第二风机26的轴功率设计为内循环第一风机25的轴功率的5倍， 电磁调速电机的控制系统的使用方法按以下步骤进行：
步骤1：电磁调速电机开机方法：先将主断路器36、辅助断路器45和低压开关柜41断开，将防潮加热器31通电12分钟后关断，然后电网接线箱35接通电网通电，定子线圈7中开始通过电流，定子铁芯6中建立起工频变化的感应磁场，导条5中也相应产生感应电流，在感应电流的作用下，主动轴8不断加速，10s后达到额定转速，此时从动轴11转速为0；然后主断路器36和低压开关柜41的开关闭合，主控制器32通过控制外转子线圈14中的电流进而控制定子线圈7的电流不超过其额定电流，使从动轴11转速不断提高直至达到满足工艺要求的转速为止，同时外转子线圈14转差所发出的电能通过主控制回路的转换变成与电网电压、频率和相位相同的电能回馈到定子线圈7；
步骤2：电磁调速电机进入正常调节的方法；当用户需求提示转速需要提高时，主控制器32通过提高外转子侧变流电路38的暂载率控制外转子线圈14的电流增大直到满足需要为止；当用户需求提示转速需要降低时，主控制器32通过降低外转子侧变流电路38的暂载率控制外转子线圈14的电流减小直到满足需要为止，该暂载率均为60％，同时外转子线圈14转差所发出的电能通过主控制回路的转换变成与电网电压、频率和相位相同的电能回馈到定子线圈7；
步骤3：当主断路器36、外转子侧滤波器37、外转子侧变流电路38、定子侧变流电路39、定子侧滤波器40、低压开关柜41、升压变压器42和高压开关柜43构成的主控制回路出现故障时，主控制器32立即控制主断路器36和低压开关柜41的开关断开，辅助断路器45接通，电阻调节器46与外转子线圈14构成封闭回路，主控制器32控制电阻调节器46调节回路中电阻，从而来调节外转子线圈14的电流，进而调节外转子线圈14的输出转速和转矩，此时外转子线圈14转差所发出的电能通过电阻调节器46的电阻发热耗散掉；
步骤4：停机方法：主控制器32将控制主断路器36、辅助断路器45和低压开关柜41的开关断开，然后电网接线箱35与电网断开，同时控制防潮加热器31通电保持电磁调速电机的内部温度和绝缘。
以上实施例仅为说明本发明的技术思想，不能以此限定本发明的保护范围，凡是按照本发明提出的技术思想，在技术方案基础上所做的任何改动，均落入本发明保护范围之内。

Claims (9)

  1. 一种大功率电磁调速电机，包括电机外壳(1),其特征在于：在所述电机外壳(1)内部且沿其长度方向设有主动装置和从动装置，主动装置由不转动的定子组件(2)和转动的内转子组件(3)组成；从动装置包括外转子组件(4)，其中转动的内转子组件(3)包括第一内转子(9)和第二内转子(10)，第一内转子(9)与定子组件(2)之间、第二内转子(10)与外转子组件(4)之间均具有转动间隙，第一内转子(9)与定子组件(2)进行电磁耦合传递扭矩，第二内转子(10)与外转子组件(4)进行电磁耦合传递扭矩。
  2. 根据权利要求1所述的大功率电磁调速电机，其特征在于：所述定子组件(2)包括与电机外壳(1)固定的定子铁芯(6)，沿定子铁芯(6)长度方向绕设有定子线圈(7)，定子线圈(7)与外部电网连接；
    内转子组件(3)包括主动轴(8)，主动轴(8)通过轴承与电机外壳(1)连接固定，沿主动轴(8)长度方向依次设有第一内转子(9)和第二内转子(10)，第一内转子(9)和第二内转子(10)均为鼠笼转子，第一内转子(9)与定子铁芯(6)对应，通过外部电网向定子线圈(7)通电，利用电磁耦传递扭矩驱动第一内转子(9)转动，最终使主动轴(8)转动。
  3. 根据权利要求1所述的大功率电磁调速电机，其特征在于：所述外转子组件(4)包括从动轴(11)，从动轴(11)通过轴承与电机外壳(1)固定，在从动轴(11)靠近第二内转子(10)的一端设有转子铁芯骨架(12)，转子铁芯骨架(12)上设有与第二内转子(10)对应的外转子铁芯(13)，沿外转子铁芯(13)长度方向绕设有外转子线圈(14)，第二内转子(10)与外转子铁芯(13)之间进行电磁耦合，从而带动从动轴(11)转动，外转子线圈(14)通过设置在从动轴(11)上的集电环(15)与外转子线圈接线箱(33)连接。
  4. 根据权利要求2所述的大功率电磁调速电机，其特征在于：所述第一内转子(9)包括套设在主动轴(8)上且由多个冷轧硅钢片叠成一定厚度的内转子铁芯(16)，第一内转子(9)与第二内转子(10)结构相同，在两个内转子铁芯(16)内部穿插有多个导条(5)以及与导条(5)配合使用的绝缘导条(57)，每个导条(5)同时穿过第一内转子(9)与第二内转子(10)，在导条(5)的两端设有端环导体(17)，通过端环导体(17)及导条(5)将两个内转子铁芯(16)连成一个整体，导条(5)位于两个内转子铁芯(16)之间套设有导条预紧带(56)。
  5. 根据权利要求2所述的大功率电磁调速电机，其特征在于：所述第一内转子(9)和第二内转子(10)之间轴向方向的最小距离为L,且L尺寸大于200mm，从动轴(11)靠近主动 轴(8)的一端设有安装孔(18)，安装孔(18)中设有过渡轴承(19)，过渡轴承(19)的外圈与从动轴(11)配合，内圈与主动轴(8)配合；电磁调速电机中设有多个轴承测温探头(20)，在从动轴(11)上设有测速齿轮(21)以及固定在电机外壳(1)上且用于测量转速的测速探头(22)，电机外壳(1)内部设有防潮加热器(31)。
  6. 根据权利要求2所述的大功率电磁调速电机，其特征在于：在所述电机外壳(1)内部设有冷却系统，冷却系统由内循环装置和外循环装置组成，电机外壳(1)包括底座(101)和设置在底座(101)上端的罩壳(102)，主动装置和从动装置均设置在底座(101)中；
    外循环装置包括罩壳(102)，罩壳(102)呈L形状，沿罩壳(102)长度方向一端设有用于放置风机的风机罩(103)，在罩壳(102)内部沿其长度方向设有多个换热管(23)，换热管(23)一端与风机罩(103)内部连通，另一端与外部连通，在主动轴(8)位于底座(101)外侧设有外循环风机(24)，外循环风机(24)设置在风机罩(103)内部；
    内循环装置包括内循环第一风机(25)、内循环第二风机(26)，在主动轴(8)靠近外循环风机(24)的一端设置内循环第一风机(25)，在从动轴(11)靠近远离转子铁芯骨架(12)的一端设有内循环第二风机(26)，主动轴(8)沿其圆周方向设有多个花键凸台(27)，第一内转子(9)、第二内转子(10)上设有与花键凸台(27)相配合的凹槽(28)，且第一内转子(9)、第二内转子(10)与主动轴(8)之间设有风道(29)，在铁芯骨架(12)上设有通风孔(30)，通过通风孔(30)将内循环第二风机(26)与风道(29)连通，通过内循环第一风机(25)将内部热风向内循环第二风机(26)扩散，然后内循环第二风机(26)将热风向上端的换热管(23)扩散，换热管(23)管内通过的是外部的低温风，利用内外风的温度差进行热交换，实现底座(101)内部降温的的目的，其中内循环第二风机(26)的轴功率设计为内循环第一风机(25)的轴功率的2倍或2倍以上。
  7. 根据权利要求1所述的大功率电磁调速电机，其特征在于：所述电磁调速电机还包括控制系统，控制系统包括主控制器(32)、设置在电机外壳(1)上的外转子线圈接线箱(33)、回馈电接线箱(34)、电网接线箱(35)，回馈电接线箱(34)和电网接线箱(35)内部电路通过导线先并联，然后再与定子线圈(7)相连，在外转子线圈接线箱(33)与回馈电接线箱(34)之间设有主工作回路；
    主工作回路包括依次串联连接的主断路器(36)、外转子侧滤波器(37)、外转子侧变流电路(38)、定子侧变流电路(39)、定子侧滤波器(40)、低压开关柜(41)、升压变压器(42)和高压开关柜(43)；
    在外转子侧变流电路(38)与外转子侧滤波器(37)之间接入用于防止电网低电压干扰低的电压抗干扰器(44)，外转子侧变流电路(38)和定子侧变流电路(39)为一对对称的PWM控制电路，能够实现可控的双向导通供电；
    在外转子线圈接线箱(33)侧还设有辅助工作回路，辅助工作回路与主工作回路并联设置，辅助工作回路包括与外转子线圈接线箱(33)依次串联的辅助断路器(45)和电阻调节器(46)；
    主断路器(36)、外转子侧变流电路(38)、低压开关柜(41)、高压开关柜(43)、辅助断路器(45)和电阻调节器(46)的控制端均与主控制器(32)连接，主控制器(32)与电网相位检测仪(47)连接，从而能接受电网的相位信号。
  8. 根据权利要求1所述的大功率电磁调速电机，其特征在于：所述电机外壳(1)上设有转速检测接线盒(49)、过渡轴承加油窗(50)、轴承测温接线箱(51)、外转子线圈接线箱(33)、线圈测温接线盒(52)、防潮加热器接线箱(53)、回馈电接线箱(34)、电网接线箱(35)、定子线圈测温探头(48)、外转子线圈测温探头(54)、集电环维护罩(55)；
    转速检测接线盒(49)、轴承测温接线箱(51)、外转子线圈接线箱(33)、线圈测温接线盒(52)、防潮加热器接线箱(53)、通过导线分别与测速探头(22)、轴承测温探头(20)、集电环(15)、定子线圈测温探头(48)、外转子线圈测温探头(54)、防潮加热器(31)，且以上的各种检测仪器的反馈端口均与主控制器(32)连接。
  9. 根据权利要求1-8任意一项所述的大功率电磁调速电机，其特征在于：所述电磁调速电机的控制系统的使用方法按以下步骤进行：
    步骤1：电磁调速电机开机方法：先将主断路器(36)、辅助断路器(45)和低压开关柜(41)断开，将防潮加热器(31)通电10-15分钟后关断，然后电网接线箱(35)接通电网通电，定子线圈(7)中开始通过电流，定子铁芯(6)中建立起工频变化的感应磁场，导条(5)中也相应产生感应电流，在感应电流的作用下，主动轴(8)不断加速，5-20s后达到额定转速，此时从动轴(11)转速为0；然后主断路器(36)和低压开关柜(41)的开关闭合，主控制器(32)通过控制外转子线圈(14)中的电流进而控制定子线圈(7)的电流不超过其额定电流，使从动轴(11)转速不断提高直至达到满足工艺要求的转速为止，同时外转子线圈(14)转差所发出的电能通过主控制回路的转换变成与电网电压、频率和相位相同的电能回馈到定子线圈(7)；
    步骤2：电磁调速电机进入正常调节的方法；当用户需求提示转速需要提高时，主控制器(32)通过提高外转子侧变流电路(38)的暂载率控制外转子线圈(14)的电流增大直到满足需要为止；当用户需求提示转速需要降低时，主控制器(32)通过降低外转子侧变流电路(38)的暂载率控制外转子线圈(14)的电流减小直到满足需要为止，同时外转子线圈(14)转差所发出的电能通过主控制回路的转换变成与电网电压、频率和相位相同的电能回馈到定子线圈(7)；
    步骤3：当主断路器(36)、外转子侧滤波器(37)、外转子侧变流电路(38)、定子侧变流电路(39)、定子侧滤波器(40)、低压开关柜(41)、升压变压器(42)和高压开关柜(43)构成的主控制回路出现故障时，主控制器(32)立即控制主断路器(36)和低压开关柜(41)的开关断开，辅助断路器(45)接通，电阻调节器(46)与外转子线圈(14)构成封闭回路，主控制器(32)控制电阻调节器(46)调节回路中电阻，从而来调节外转子线圈(14)的电流，进而调节外转子线圈(14)的输出转速和转矩，此时外转子线圈(14)转差所发出的电能通过电阻调节器(46)的电阻发热耗散掉；
    步骤4：停机方法：主控制器(32)将控制主断路器(36)、辅助断路器(45)和低压开关柜(41)的开关断开，然后电网接线箱(35)与电网断开，同时控制防潮加热器(31)通电保持电磁调速电机的内部温度和绝缘。
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