CN104378034A - Operation control system of brushless alternating-current hybrid excitation brushless direct-current motor - Google Patents
Operation control system of brushless alternating-current hybrid excitation brushless direct-current motor Download PDFInfo
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- CN104378034A CN104378034A CN201410663153.4A CN201410663153A CN104378034A CN 104378034 A CN104378034 A CN 104378034A CN 201410663153 A CN201410663153 A CN 201410663153A CN 104378034 A CN104378034 A CN 104378034A
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- 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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
Abstract
The invention discloses an operation control system of a brushless alternating-current hybrid excitation brushless direct-current motor. The operation control system comprises a rectification part, an energy storage part, an inversion part, a sine filter, an output transformer, a load/a main generator, an alternating-current variable frequency excitation part and a control part. A stator power winding of the motor is connected with the input end of the rectification part through a three-phase line, the positive-negative direct-current bus output end of the rectification part is connected with the positive-negative direct-current bus input end of the inversion part, an energy storage part is connected to a positive-negative direct-current bus in parallel, the output end of the inversion part is connected with the input end of the sine filter through a three-phase line, the output end of the sine filter is connected with the three-phase input end of the output transformer through a three-phase line, the output transformer is connected with the load/ the main generator, a stator excitation winding is connected to the three-phase output end of the alternating-current variable frequency excitation part through a three-phase line, the positive-negative direct-current bus input end of the alternating-current variable frequency excitation part is connected to the positive-negative direct-current bus in parallel, and the control part provides control signals for the inversion part and the alternating-current variable frequency excitation part.
Description
Technical field
The present invention relates to a kind of operation control system of motor, particularly relate to a kind of operation control system of brushless ac compound rectifier excitation brshless DC motor.
Background technology
Current brushless excitation brshless DC motor have employed DC excitation at excitation side majority, and is all adopt direct current winding electric magnetic field to carry out rotor power excitation in rotor power excitation.What show as Figure 11 is the operation control system of DC excitation alternating current generator.Although DC excitation controls relatively simple, technology is comparative maturity also, and conventional DC excitation electromotor exists the problem that DC excitation efficiency is low, range of operation is narrow or excitation lost efficacy and power density is on the low side at the low rotational speed, reduces electric excitation efficiency.And rotor power excitation only adopts direct current winding electric magnetic field to send conventional sine voltage.For solving the problem that excitation efficiency reduces or excitation lost efficacy that DC excitation exists at the low rotational speed.In order to improve power density and the generating efficiency of brushless excitation brshless DC motor further.After my department have passed through large quantity research, demonstration, checking, proposed and applied for number of patent application be 201410356061.1 patent of invention and number of patent application be " the brushless ac compound rectifier excitation brshless DC motor " of the utility model patent of 201420412580.0.
But in order to realize the function of brushless ac compound rectifier excitation brshless DC motor, need for it provides a kind of operation control system being specially adapted to this motor.For enabling motor realize alternating-current brushless variable frequency excitation, native system have employed the brushless ac excitation winding that AC frequency conversion excitation division is motor and provides AC frequency conversion exciting voltage.And according to power of motor size, stator power winding adopts the polyphase windings such as three, six, nine, motor operation control system also correspondingly adopts the multiple-pulse rectifications such as 6,12,18.Thus the object reaching harmonic reduction, reduce system cost, improve the generating efficiency of system.
In addition, for realizing function of promptly pulling in shore (the Take Home System) function as boats and ships Shaft-Generator under special occasions.Namely damage in emergency circumstances at sustainer, main frame and gear box can be thrown off, subsidiary engine drives main generator to power as boats and ships emergency power supply, originally the axle generator being operated in generating state then becomes the work of axle band motor, thus driving screw, realize meeting an urgent need and pull in shore (Take Home System).In addition, ship power supply also comprises the little emergency power supply that batteries is formed.When main generator group can not be powered, powered to the important navigational equipment of boats and ships and emergency lighting system by Emergency generator or batteries.The operation control system of the brushless ac compound rectifier excitation brshless DC motor therefore in the present invention, needs to possess and makes power by brushless excitation brshless DC motor to load/master and the ability by the two-way flow main generator to brushless excitation brshless DC motor.
Summary of the invention
The object of this invention is to provide a kind of operation control system of brushless ac compound rectifier excitation brshless DC motor.Motor have employed alternating-current brushless excitation, solve low speed excitation problem, ensure that more than zero-speed can generate electricity, expanded the working range of electricity generation system; Employing rotary rectifier, compound (permanent magnetic field+DC electromagnetic field) excitation brushless DC generator, improves power of motor density and reduces motor and system cost; Generating end adopts brushless direct-current winding, produces trapezoidal wave generating voltage, improves low speed generated output, improves power density further, significantly reduce motor and system bulk; According to watt level, the multiple-pulse rectifications such as employing 6,12,18, harmonic reduction, can cancel PWM rectification, reduces system cost, improves the efficiency of whole service system; Adopt four-quadrant commutation inversion scheme in rectification and inversion link, whole system can be made not change on the basis of system configuration, realize the switching of generating state to motoring condition.
Brushless ac compound rectifier excitation brshless DC motor (1) of the present invention includes: stator excitation winding (12), rotor (13), stator power winding (14).Described rotor (13) comprises rotor field coil (131), rotating rectifier (132), rotor power Energizing unit (133), described rotor power Energizing unit (133) comprises direct current winding (1331) and permanent magnet (1332), and direct current winding (1331) is attached around permanent magnet (1332) is upper and both carry out compound rectifier excitation.
Operation control system of the present invention includes: comprise rectification part (3), energy storage part (4), inverting part (5), sinusoidal filter (6), output transformer (7), load/master (8), AC frequency conversion excitation division (9), control part (10); wherein the stator power winding (14) of brushless ac compound rectifier excitation brshless DC motor is connected to the input of rectification part by three-phase line, the positive and negative DC bus output of rectification part (3) is connected to the positive and negative DC bus input of inverting part (5), and the positive and negative DC bus between rectification part (3) and inverting part (5) is parallel with energy storage part (4), the output of inverting part (5) is connected to the input of sinusoidal filter (6) by three-phase line, the output of sinusoidal filter (6) is connected to the three-phase input end of output transformer (7) by three-phase line, output transformer (7) is connected to load/master by three-phase and four-line circuit or three-phase line and sends out (8), stator excitation winding (12) is connected to the three-phase output end of AC frequency conversion excitation division (9) by three-phase line, the positive and negative DC bus input of AC frequency conversion excitation division (9) is parallel on the positive and negative DC bus between energy storage part (4) and inverting part (5), control part (10) provides control signal for inverting part (5) and AC frequency conversion excitation division (9).
Described a kind of operation control system also includes: direct current reactor (2); When the brushless ac compound rectifier excitation brshless DC motor (1) in system is at upper employing six phase winding of its stator power winding (14), and when being divided into two groups 120 ° symmetrical three-phase star winding, system adopts two groups of three phase rectifier portions (3) to carry out six impulse commutations; Between two groups of direct current reactors (2) are connected between the DC bus output plus terminal of two groups of rectification part (3) and energy storage part (4) positive pole respectively, the output voltage of two groups of rectification part (3) is all pressed.
Wherein first group of three-phase star winding connects the input of first group of rectification part (3) by three-phase line, the positive and negative DC bus output of rectification part (3) is connected to the positive and negative DC bus input of inverting part (5), positive and negative DC bus between rectification part (3) and inverting part (5) is parallel with energy storage part (4), and positive direct-current bus between rectification part (3) DC bus positive output end and energy storage part (4) positive pole is in series with first group of direct current reactor (2).
Second group of three-phase star winding of stator power winding (14) connects the input of second group of rectification part (3) by three-phase line, positive and negative DC bus between this group rectification part (3) and inverting part (5) is parallel with energy storage part (4), the positive and negative DC bus output of rectification part (3) is connected to the positive and negative DC bus input of inverting part (5), the positive and negative DC bus output of this group rectification part (3) is parallel to the both positive and negative polarity of energy storage part (4), and positive direct-current bus between this group rectification part (3) DC bus positive output end and energy storage part (4) positive pole is in series with second group of direct current reactor (2).
The output of inverting part (5) is connected to the input of sinusoidal filter (6) by three-phase line, the output of sinusoidal filter (6) is connected to the three-phase input end of output transformer (7) by three-phase line.Output transformer (7) is connected to load/master by three-phase and four-line circuit or three-phase line and sends out (8).The stator power winding (14) of motor is connected to the three-phase output end of the AC frequency conversion excitation division (9) of operational system by three-phase line, the positive and negative DC bus input of AC frequency conversion excitation division (9) is parallel on the positive and negative DC bus between energy storage part (4) and inverting part (5).Control part (10) provides control signal for inverting part (5) and AC frequency conversion excitation division (9).
Described a kind of operation control system also includes: position detection unit (11).Position detection unit (11) is had to gather motor rotor position signal and provide it to control part (10) at the position probing end of brushless ac compound rectifier excitation brshless DC motor (1).
Described AC frequency conversion excitation division (9) adopts three-phase IGBT entirely to control full bridge structure, by control part (10) for each IGBT provides make-and-break signal.Wherein reverse parallel connection fly-wheel diode between the C pole (collector electrode) of each IGBT and E pole (emitter), fly-wheel diode to C pole one-way conduction, plays afterflow effect when IGBT power switch pipe turns off by E pole.The positive and negative direct-flow input end of AC frequency conversion excitation division (9) is connected to positive and negative DC bus, and from power taking positive and negative DC bus as current source, entirely controlling full-bridge inverting by three-phase IGBT is AC frequency conversion exciting current, and the stator power winding (14) that the three-phase output end of AC frequency conversion excitation division (9) is connected to brushless ac compound rectifier excitation brshless DC motor (1) by three-phase line produces AC frequency conversion excitation induction field.
Described rectification part (3) includes: the uncontrollable rectification of three phase full bridge diode, the rectification of three phase full bridge thyristor half control, the rectification of three phase full bridge IGBT half control, three phase full bridge thyristor full-controlled rectifier, three phase full bridge IGBT full-controlled rectifier.Preferably, rectification part (3) have employed the uncontrollable rectification of three phase full bridge diode and three phase full bridge TGBT full-controlled rectifier in the present invention.Concrete, rectification part (3) in the present invention comprising: PWM rectification part (31), full-bridge rectification portion (32), commutation inversion portion (33).Especially, commutation inversion portion (33) refer to the PWM rectification that three phase full bridge IGBT both can be operated in rectification state, can also be operated in the full control inversion of inverter mode.
It is that three phase full bridge IGBT controls inversion entirely that described inverting part (5) adopts.Inverting part (5) adopts the full control structure of three-phase IGBT full-bridge, by control part (10) for each IGBT provides make-and-break signal.Wherein reverse parallel connection fly-wheel diode between the C pole (collector electrode) of each IGBT and E pole (emitter), fly-wheel diode to C pole one-way conduction, plays afterflow effect when IGBT power switch pipe turns off by E pole.Concrete, inverting part (5) in the present invention comprising: entirely control inverting part (51); Inversion rectification part (52).Especially, inversion rectification part (52) refers to the full control inversion that three phase full bridge IGBT both can be operated in inverter mode, can also be operated in the PWM rectification of rectification state.
Based on the difference of described rectification part (3) and inverting part (5), what control part (10) was concrete further comprises for entirely controlling inverting part (51), inversion rectification part (52), AC frequency conversion excitation division (9), PWM rectification part (31), commutation inversion portion (33) provide control signal.
Described energy storage part (4) includes: the battery pack of DC/DC conversion, super capacitor, high-energy capacitor, electrochemical capacitor, lead acid accumulator, nickel-cadmium cell, Ni-MH battery, flow battery, sodium-sulphur battery, one or more in lithium ion battery, annexation is the one in series, parallel, series-parallel connection.Preferably, have employed large value capacitor in the present invention and carry out DC bus filtering and energy storage.
Described load/master sends out (8) and includes: electrical load (81) and main generator (82).Concrete, when the operation control system of described brushless ac compound rectifier excitation brshless DC motor be only used as generator operation send out that in (8), electrical load (81) is powered to load/master time, due to by electric loading many employings three-phase and four-line line system.Therefore output transformer (7) adopts the electrical load (81) in three-phase and four-line connection load/master (8).Concrete, when the operation control system of brushless ac compound rectifier excitation brshless DC motor should be used as generator operation to sending out main generator (82) power supply in (8) for load/master, when the middle main generator (82) of load/master (8) being powered as electric operation to brushless ac compound rectifier excitation brshless DC motor (1) again, because main generator (82) only needs to adopt three-phase line, therefore output transformer (7) adopts the main generator (82) in three-phase line connection load/master (8).Especially, when main generator adopts permagnetic synchronous motor, it is specially adapted to be used as motor running, again can as generator operation.
Described sinusoidal filter (6) is three-phase filter structure, is three-phase filter inductance L at its input, is parallel with three groups of RC capacitance-resistance in parallel of star-like connection or three groups of RC capacitance-resistances in parallel of angle-style connection at its output.When the operation control system of described brushless ac compound rectifier excitation brshless DC motor be only used as generator operation power to electrical load (81) time, sinusoidal filter (6) is being filtered in sinusoidal wave process is understanding a large amount of higher harmonic component of filtering by entirely controlling PWM ripple that inverting part (51) exports.When the operation control system of described brushless ac compound rectifier excitation brshless DC motor is used as electric operation, and when being powered by main generator (82), inversion rectification part (52) is operated in rectification state, and the three-phase filter inductance L in inversion rectification part (52) and sinusoidal filter (6) forms three-phase PFC jointly carries out PWM rectification.
Described output transformer (7) includes: phase three-wire three primary side to phase three-wire three secondary side and phase three-wire three primary side to three-phase and four-line secondary side two kinds of structures.When load/master sends out (8) employing electrical load (81), phase three-wire three primary side is three-phase input end, and three-phase and four-line secondary side is output and connects electrical load (81) by three-phase and four-line; When load/master sends out (8) employing main generator (82), phase three-wire three primary side is three-phase input end, and phase three-wire three secondary side is output and connects main generator (82) by three-phase line.
Operation control system superiority of the present invention and technique effect are:
1, operation control system of the present invention have employed AC frequency conversion excitation division for motor provides AC frequency conversion excitation, compare the DC excitation that brushless excitation synchronous motor exchanges end, solve the problem that excitation efficiency reduces or excitation lost efficacy and power density is on the low side that motor exists at the low rotational speed, ensure that more than zero-speed can generate electricity, expanded the working range of electricity generation system;
The multiple-pulse rectifications such as 2, operation control system of the present invention is according to the multi-phase excitation of motor stator power winding, employing 6,12,18, harmonic reduction, can cancel PWM rectification, reduces system cost, improves the efficiency of whole service system;
3, operation control system of the present invention adopts four-quadrant commutation inversion scheme in rectification and inversion link, whole system can be made not change on the basis of system configuration, realize the switching of operational system from generating state to motoring condition;
4, operation control system of the present invention adopts brushless ac compound rectifier excitation brushless dc function to obtain more highdensity power stage, can solve that conventional motor exciting current is comparatively large, the problem such as operate power and efficiency is low, excitation loss is higher, power consumption, poor stability, poor reliability;
5, operation control system of the present invention has position detection unit gather motor rotor position signal and provide it to control part at the position probing end of brushless ac compound rectifier excitation brshless DC motor.And motor have employed D.C. magnetic field and permanent magnetic field compound rectifier excitation on the rotor of power winding terminal, compare AC induction motor and more easily realize the accurate control of motor under various operating mode;
6, to solve synchronous machine power in conjunction with the advantage of synchronous machine and direct current machine less in the present invention, the high and starting difficulty of cost; Asynchronous machine efficiency and power density problem on the low side; A kind of operation control system being applicable to brushless ac compound rectifier excitation brshless DC motor is provided.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiments of the invention are described further.
Fig. 1 is operation control system of the present invention 1st principle assumption diagram;
Fig. 2 is operation control system of the present invention 2nd principle assumption diagram;
Fig. 3 is operation control system of the present invention 3rd principle assumption diagram;
Fig. 4 is operation control system of the present invention 4th principle assumption diagram;
Fig. 5 is that operation control system of the present invention 1st implements illustration;
Fig. 6 is that operation control system of the present invention 2nd implements illustration;
Fig. 7 is that operation control system of the present invention 3rd implements illustration;
Fig. 8 is that operation control system of the present invention 4th implements illustration;
Fig. 9 is that operation control system of the present invention 5th implements illustration;
Figure 10 is that operation control system of the present invention 6th implements illustration;
Figure 11 is that the operation control system of existing DC excitation alternating current generator implements illustration;
Figure 12 is the principle assumption diagram of brushless ac compound rectifier excitation brshless DC motor of the present invention.
Label declaration
Operational system part of the present invention:
Brushless ac compound rectifier excitation brshless DC motor (1); Direct current reactor (2); Rectification part (3); PWM rectification part (31); Full-bridge rectification portion (32); Commutation inversion portion (33); Energy storage part (4); Inverting part (5); Full control inverting part (51); Inversion rectification part (52); Sinusoidal filter (6); Output transformer (7); Load/master sends out (8); Electrical load (81); Main generator (82); AC frequency conversion excitation division (9); Control part (10); Position detection unit (11).
The operational system part of existing DC excitation alternating current generator:
DC excitation alternating current generator (16); DC excitation unit (91).
Motor part of the present invention:
Stator excitation winding (12); Rotor (13); Stator power winding (14); Power winding terminal (15); Rotor field coil (131); Rotating rectifier (132); Rotor power Energizing unit (133); Protected location (134); Direct current winding (1331); Permanent magnet (1332);
Embodiment
Fig. 1 is the 1st principle assumption diagram of operation control system of the present invention.In present principles structure chart, brushless ac compound rectifier excitation brshless DC motor 1 carries out generator operation as Generator.Wherein, the stator power winding (14) of brushless ac compound rectifier excitation brshless DC motor (1) is connected to the input of rectification part (3) by three-phase line, the positive and negative DC bus output of rectification part (3) is connected to the positive and negative DC bus input of inverting part (5), and positive and negative DC bus between rectification part (3) and inverting part (5) is parallel with energy storage part (4).The output of inverting part (5) is connected to the input of sinusoidal filter (6) by three-phase line, the output of sinusoidal filter (6) is connected to the three-phase input end of output transformer (7) by three-phase line.Output transformer (7) is connected to load/master by three-phase and four-line circuit or three-phase line and sends out (8).The stator excitation winding (12) of motor is connected to the three-phase output end of the AC frequency conversion excitation division (9) of operational system by three-phase line, the positive and negative DC bus input of AC frequency conversion excitation division (9) is parallel on the positive and negative DC bus between energy storage part (4) and inverting part (5).Control part (10) provides control signal for inverting part (5) and AC frequency conversion excitation division (9).
It is direct current that stator power winding (14) sends three-phase alternating current by rectification part (3) rectification, connect energy storage part (4) by positive and negative DC bus again and carry out filtering, energy storage, and filtered direct current to be flowed to inverting part (5) inversion be the controlled alternating current of frequency, flow to sinusoidal filter by three-phase line and the PWM ripple that inverting part (5) exports is filtered into sine wave, a large amount of higher harmonic component of filtering simultaneously.Filtered alternating current is by powering for load/master sends out (8) after output transformer (7) transformation.Meanwhile, obtaining DC inverter by AC frequency conversion excitation division (9) from positive and negative DC bus is three phase variable frequency alternating current, and the stator excitation winding (12) being supplied to brushless ac compound rectifier excitation brshless DC motor (1) produces alternating magnetic field.Control part (10) provides control signal for inverting part (5) and AC frequency conversion excitation division (9) in the process.
Fig. 2 is the 2nd principle assumption diagram of operation control system of the present invention.In present principles structure chart, brushless ac compound rectifier excitation brshless DC motor 1 carries out generator operation as Generator.Wherein, the stator power winding (14) of brushless ac compound rectifier excitation brshless DC motor (1) adopts six phase windings, and is divided into two groups 120 ° symmetrical three-phase star winding.Wherein first group of three-phase star winding connects the input of first group of rectification part (3) by three-phase line, the positive and negative DC bus output of rectification part (3) is connected to the positive and negative DC bus input of inverting part (5), positive and negative DC bus between rectification part (3) and inverting part (5) is parallel with energy storage part (4), and positive direct-current bus between rectification part (3) DC bus positive output end and energy storage part (4) positive pole is in series with first group of direct current reactor (2).
Second group of three-phase star winding of stator power winding (14) connects the input of second group of rectification part (3) by three-phase line, positive and negative DC bus between this group rectification part (3) and inverting part (5) is parallel with energy storage part (4), the positive and negative DC bus output of rectification part (3) is connected to the positive and negative DC bus input of inverting part (5), the positive and negative DC bus output of this group rectification part (3) is parallel to the both positive and negative polarity of energy storage part (4), and positive direct-current bus between this group rectification part (3) DC bus positive output end and energy storage part (4) positive pole is in series with second group of direct current reactor (2).The output of inverting part (5) is connected to the input of sinusoidal filter (6) by three-phase line, the output of sinusoidal filter (6) is connected to the three-phase input end of output transformer (7) by three-phase line.Output transformer (7) is connected to load/master by three-phase and four-line circuit or three-phase line and sends out (8).The stator excitation winding (12) of motor is connected to the three-phase output end of the AC frequency conversion excitation division (9) of operational system by three-phase line, the positive and negative DC bus input of AC frequency conversion excitation division (9) is parallel on the positive and negative DC bus between energy storage part (4) and inverting part (5).Control part (10) provides control signal for inverting part (5) and AC frequency conversion excitation division (9).
The difference of the 2nd principle assumption diagram and the 1st principle assumption diagram is that the stator power winding (14) of brushless ac compound rectifier excitation brshless DC motor (1) adopts six phase windings, and is divided into two groups 120 ° symmetrical three-phase star winding.Two groups of three-phase star windings send two groups of three-phase alternating currents, and to be delivered to the rectification of two groups of rectification part (3) respectively by three-phase line be direct current, then two groups of direct currents are connected in parallel to positive and negative DC bus.But because the output current of two groups of rectification part (4) exists unbalanced situation, therefore before two groups of direct currents are connected in parallel to positive and negative DC bus, need all to press process to two groups of direct currents, therefore in the second principle assumption diagram two groups of rectification part (3) output positive direct-current bus on be all in series with direct current reactor (2), after all pressing process, direct current after two groups of rectifications is through energy storage part (4) filtering, energy storage, and filtered direct current to be flowed to inverting part (5) inversion be the controlled alternating current of frequency, flow to sinusoidal filter by three-phase line and the PWM ripple that inverting part (5) exports is filtered into sine wave, the PWM ripple exported is filtered into sine wave, the a large amount of higher harmonic component of filtering simultaneously.Filtered alternating current is by powering for load/master sends out (8) after output transformer (7) transformation.Meanwhile, obtaining DC inverter by AC frequency conversion excitation division (9) from positive and negative DC bus is three phase variable frequency alternating current, and the stator excitation winding (12) being supplied to brushless ac compound rectifier excitation brshless DC motor (1) produces alternating magnetic field.Control part (10) provides control signal for inverting part (5) and AC frequency conversion excitation division (9) in the process.
Fig. 3 is the 3rd principle assumption diagram of operation control system of the present invention.The difference of the 3rd principle assumption diagram and the 1st principle assumption diagram is when rectification part (3) adopts PWM rectification part (31) of three phase full bridge IGBT full-controlled rectifier.Because control part (10) needs with reference to motor rotor position information, because this increasing position detection unit (11) for PWM rectification part (31) provides during control signal.Position detection unit (11) is had to gather motor rotor position signal and provide it to control part (10) at the position probing end of brushless ac compound rectifier excitation brshless DC motor (1).
Fig. 4 is the 4th principle assumption diagram of operation control system of the present invention.The difference of the 4th principle assumption diagram and the 2nd principle assumption diagram is when two groups of rectification part (3) adopt PWM rectification part (31) of three phase full bridge IGBT full-controlled rectifier.Due to control part (10) be two groups of PWM rectification part (31) control signal is provided time need with reference to motor rotor position information, because this increasing position detection unit (11).Position detection unit (11) is had to gather motor rotor position signal and provide it to control part (10) at the position probing end of brushless ac compound rectifier excitation brshless DC motor (1).
Fig. 5 is the figure of operation control system (1) embodiment of the present invention.In the present embodiment, brushless ac compound rectifier excitation brshless DC motor (1) carries out generator operation as Generator.
The stator power winding (14) of brushless ac compound rectifier excitation brshless DC motor (1), adopt three-phase star winding that the three-phase alternating current sent is delivered to full-bridge rectification portion (32), this full-bridge rectification portion (3) 2 adopts diode to carry out the uncontrollable rectification of three-phase (6) pulse.
Three-phase alternating current electric rectification is after direct current by full-bridge rectification portion (32), flows to full control inverse (51) carry out three phase full bridge IGBT and entirely control inversion by positive and negative DC bus.DC inverter on positive and negative DC bus is that three-phase alternating current flows to sinusoidal filter (6) by full control inverting part (51), sinusoidal filter (6) filters into the voltage waveform of near sinusoidal by entirely controlling SPWM modulating wave that inverting part (51) exports, to reduce entirely to control inverting part (51 high-frequency harmonics exported, thus effective suppression high-frequency loss and dv/dt radio frequency interference.Filtered alternating current is flowed to the primary side of output transformer (7) by sinusoidal filter, and output transformer (7) mainly plays the effects such as buck/boost, matched impedance, Secure isolation.Output transformer (7) secondary side is connected to electrical load (81) by three-phase and four-line, for user provides 380V and 220V power supply needed for load.Control part (10) for entirely to control inverting part (51 and AC frequency conversion excitation division (9) the control IGBT pwm signal of break-make is provided.
AC frequency conversion excitation division 9 adopts IGBT to carry out three phase full bridge equally and entirely controls inversion.The positive and negative DC terminal of AC frequency conversion excitation division (9) is from power taking positive and negative DC bus, by by DC inverter being the three-phase alternating current of electric current and voltage frequency-adjustable, be supplied to the stator excitation winding (12) of brushless ac compound rectifier excitation brshless DC motor (1), carry out variable frequency excitation, thus expand the range of operation of conventional DC excitation electromotor, and solve the problem of the DC exciting motor low and easy excitation inefficacy of excitation efficiency at the low rotational speed.
Fig. 6 is the figure of operation control system of the present invention 2nd embodiment.In the present embodiment, brushless ac compound rectifier excitation brshless DC motor (1) carries out generator operation as generator.
Six cross streams that the stator power winding (14) of brushless ac compound rectifier excitation brshless DC motor (1) adopts six phase star winding to send are electric, be divided into two groups 120 ° symmetrical three-phase alternating currents to flow to two groups of full-bridge rectification portions (32) respectively, two groups of full-bridge rectification portions (32) all adopt diode to carry out the uncontrollable rectification of three-phase 6 pulse.First group of three-phase star winding connects the three-phase input end in full-bridge rectification portion (32) by three-phase line, second group of three-phase star winding also connects the three-phase input end in full-bridge rectification portion (32) by three-phase line; The positive and negative DC terminal in full-bridge rectification portion (32) is connected in parallel to the positive and negative terminal of energy storage part (4) by positive and negative DC bus, and positive direct-current bus between full-bridge rectification portion (32) and energy storage part (4) is in series with direct current reactor (2); The positive and negative DC terminal in full-bridge rectification portion (32) is also connected in parallel to the positive and negative terminal of energy storage part (4) by positive and negative DC bus, and positive direct-current bus between full-bridge rectification portion (32) and energy storage part (4) is in series with direct current reactor (2) equally; Both the positive and negative DC bus parallel connection of output due to two groups of full-bridge rectification portions (32) causes there is the problem that tube voltage drop differs in rectifier cells, so need respective series direct current reactor (2) before the output positive direct-current bus of two groups of full-bridge rectification portions (32) is connected in parallel to energy storage part (4) all to press.
Wherein energy storage part (4) plays the effect of energy storage, filtering, the positive and negative terminal of energy storage part (4) is connected to by positive and negative DC bus controls inverting part (51) entirely, entirely controls inverting part (51) and adopts IGBT to carry out three phase full bridge and entirely control inversion.DC inverter on positive and negative DC bus is that three-phase alternating current flows to sinusoidal filter (6) by full control inverting part (51), the high-frequency harmonic that sinusoidal filter (6) will entirely be controlled voltage waveform that SPWM modulating wave that inverting part (51) exports filters near sinusoidal and exports to reduce entirely to control inverting part (51), thus effectively suppress high-frequency loss and dv/dt radio frequency interference.Filtered alternating current is flowed to the primary side of output transformer (7) by sinusoidal filter, and output transformer (7) mainly plays the effects such as buck/boost, matched impedance, Secure isolation.Output transformer (7) secondary side is connected to electrical load (81) by three-phase and four-line, for user provides 380V and 220V power supply needed for load.Control part (10) is for entirely controlling inverting part (51) and AC frequency conversion excitation division (9) provides the control IGBT pwm signal of break-make.
AC frequency conversion excitation division (9) adopts IGBT to carry out three phase full bridge equally and entirely controls inversion.And provide the control IGBT pwm signal of break-make by control part (10).The positive and negative DC terminal of AC frequency conversion excitation division (9) is from power taking positive and negative DC bus, by by DC inverter being the three-phase alternating current of electric current and voltage frequency-adjustable, be supplied to the stator excitation winding (12) of brushless ac compound rectifier excitation brshless DC motor (1), carry out variable frequency excitation, thus expand the range of operation of conventional DC excitation electromotor, and solve the problem of the DC exciting motor low and easy excitation inefficacy of excitation efficiency at the low rotational speed.
Fig. 7 is the figure of operation control system of the present invention 3rd embodiment.In the present embodiment, brushless ac compound rectifier excitation brshless DC motor (1) carries out generator operation as generator.
The stator power winding (14) of brushless ac compound rectifier excitation brshless DC motor (1), adopts three-phase star winding that the three-phase alternating current sent is delivered to PWM rectification part (31).PWM rectification part (31) adopts IGBT to build three phase full bridge structure as shown in the figure, reverse parallel connection diode between the collector electrode C pole of same each IGBT power switch pipe and emitter E pole, diode by E pole to C pole one-way conduction.
During PWM rectification part (31) employing PWM rectification, main employing IGBT carries out three-phase 6 pulse full-bridge full-controlled rectifier, and control part (10) is for PWM rectification part (31) and entirely control inverting part (51) and provide the control IGBT pwm signal of break-make.With the diode of each IGBT reverse parallel connection in the process, play afterflow effect when IGBT power switch pipe turns off.
The three-phase alternating current electric rectification that brushless ac compound rectifier excitation brshless DC motor (1) sends is that direct current is flowed to by positive and negative DC bus and entirely controls inverting part (51) by PWM rectification part (31), energy storage part (4) in parallel on positive and negative DC bus plays the effect of energy storage, filtering, entirely controls inverting part (51) and adopts IGBT to carry out three phase full bridge equally entirely to control inversion.DC inverter on positive and negative DC bus is that three-phase alternating current flows to sinusoidal filter (6) by full control inverting part (51), the high-frequency harmonic that sinusoidal filter (6) will entirely be controlled voltage waveform that SPWM modulating wave that inverting part (51) exports filters near sinusoidal and exports to reduce entirely to control inverting part (51), thus effectively suppress high-frequency loss and dv/dt radio frequency interference.Filtered alternating current is flowed to the primary side of output transformer (7) by sinusoidal filter, and output transformer (7) mainly plays the effects such as buck/boost, matched impedance, Secure isolation.Output transformer (7) secondary side is connected to electrical load (81) by three-phase and four-line, for user provides 380V and 220V power supply needed for load.Control part (10) exports pwm control signal to inversion rectification part (52), inversion rectification part (52) and AC frequency conversion excitation division (9).Position detection unit (11) provides the rotor-position signal of brushless ac compound rectifier excitation brshless DC motor (1) for control part (10).
AC frequency conversion excitation division (9) adopts IGBT to carry out three phase full bridge equally and entirely controls inversion.The positive and negative DC terminal of AC frequency conversion excitation division (9) is from power taking positive and negative DC bus, by by DC inverter being the three-phase alternating current of electric current and voltage frequency-adjustable, be supplied to the stator excitation winding (12) of brushless ac compound rectifier excitation brshless DC motor (1), carry out variable frequency excitation, thus expand the range of operation of conventional DC excitation electromotor, and solve the problem of the DC exciting motor low and easy excitation inefficacy of excitation efficiency at the low rotational speed.
Fig. 8 is the figure of operation control system of the present invention 4th embodiment.In the present embodiment, operation control system is substantially identical with embodiment in Fig. 73.Brushless ac compound rectifier excitation brshless DC motor (1) both can carry out generator operation as embodiment 3 as generator, can also carry out electric operation as motor.
But with the embodiment 3 in Fig. 7 unlike, in embodiment 4, when system power flows to main generator (82) from brushless ac compound rectifier excitation brshless DC motor (1), commutation inversion portion (33) is operated in PWM rectification state, and inversion rectification part (52) is operated in controls inverter mode entirely.When system power flows to brushless ac compound rectifier excitation brshless DC motor (1) from main generator (82), commutation inversion portion (33) is operated in controls inverter mode entirely, and inversion rectification part (52) is operated in PWM rectification state.Therefore for distinguishing over rectifying part in embodiment 3 and Converting Unit, especially the three phase full bridge IGBT at two places is defined as commutation inversion portion (33) and inversion rectification part (52) respectively.
Fig. 9 is the figure of operation control system of the present invention 5th embodiment.In the present embodiment, in the present embodiment, brushless ac compound rectifier excitation brshless DC motor (1) carries out generator operation as generator.
In Fig. 9, the stator power winding (14) of brushless ac compound rectifier excitation brshless DC motor (1) adopts six phase star winding, and be divided into two groups 120 ° symmetrical external two groups of three-phase lines of three-phase star winding and be connected to respective rectification part, first group of three-phase star winding connects the three-phase input end of one group of PWM rectification part (31) by three-phase line, second group of three-phase star winding connects the three-phase input end of another group PWM rectification part (31) by three-phase line; The positive and negative DC terminal of first group of PWM rectification part (31) is connected in parallel to the positive and negative terminal of energy storage part (4) by positive and negative DC bus, and positive direct-current bus between PWM rectification part (31) and energy storage part (4) is in series with direct current reactor (2); The positive and negative DC terminal of second group of PWM rectification part (31) is also connected in parallel to the positive and negative terminal of energy storage part (4) by positive and negative DC bus, and positive direct-current bus between PWM rectification part (31) and energy storage part (4) is in series with direct current reactor (2) equally; The positive and negative terminal of energy storage part (4) is connected to again the positive and negative DC terminal entirely controlling inverting part (51) by positive and negative DC bus, the three-phase output end of full control inverting part (51) is connected to the three-phase input end of sinusoidal filter (6) by three-phase line, the three-phase output end of sinusoidal filter (6) is connected to the three-phase input end of output transformer (7) by three-phase line, the three-phase output end of transformer (7) is connected to main generator (82) by three-phase line.
The stator excitation winding (12) of brushless ac compound rectifier excitation brshless DC motor (1) is connected to the three-phase output end of AC frequency conversion excitation division (9) by three-phase line, the positive and negative DC terminal of AC frequency conversion excitation division (9) is connected in parallel to the two ends of energy storage part (4) on positive and negative DC bus.Control part (10) to PWM rectification part (31), entirely control inverting part (51) and AC frequency conversion excitation division (9) and export pwm control signal.Position detection unit (11) provides the rotor-position signal of brushless ac compound rectifier excitation brshless DC motor (1) for control part (10).
Figure 10 is the figure of operation control system of the present invention 6th embodiment.In the present embodiment, operation control system is substantially identical with embodiment in Fig. 95.But brushless ac compound rectifier excitation brshless DC motor (1), except being used as generator, also carries out electric operation as motor.
But with the embodiment 5 in Fig. 9 unlike, in embodiment 6, when system power flows to main generator (82) from brushless ac compound rectifier excitation brshless DC motor (1), two groups of commutation inversion portions (33) are operated in PWM rectification state, and inversion rectification part (52) is operated in controls inverter mode entirely.When system power flows to brushless ac compound rectifier excitation brshless DC motor (1) from main generator (82), commutation inversion portion (33) is operated in controls inverter mode entirely, and inversion rectification part (52) is operated in PWM rectification state.Therefore for distinguishing over rectifying part in embodiment 5 and Converting Unit, especially the three phase full bridge IGBT at three places is defined as commutation inversion portion (33) and inversion rectification part (52) respectively.
To sum up, can find out from the main circuit diagram of above embodiment 5 and embodiment 3, the difference of embodiment 5 and embodiment 3 is that the stator power winding (14) of brushless ac compound rectifier excitation brshless DC motor (1) have employed 6 phase star winding, so add one group of commutation inversion portion (33), and add two groups of direct current reactors (2) of current-sharing.But integrated embodiment 3, embodiment 4, embodiment 5, embodiment 6 again, can find to change motor when brushless ac compound rectifier excitation brshless DC motor (1) into by generator, when load motor is converted to generator by motor, in these four embodiments, system main circuit can realize the two-way flow of energy.Only need according to electrical load (81) on output transformer (7), this is for user provides the needs of 220V output power, have employed three-phase four-wire system and three-phase three-wire system.The principle of whole system main circuit is not affected.
Due to commutation inversion portion (33) in circuit in embodiment 5 and inversion rectification part (51), arrange back-to-back, bi-directional energy flow can be realized, so the typical apply that can push away as generating and electricity in this embodiment of ship shaft band power field.And inversion rectification part (51) has input current sine, harmonic content is low, and the high and bi-directional energy flow of power factor, the features such as volume is little and lightweight, at power factor compensation, electric energy feedback, the fields such as active power filtering also have a wide range of applications.
Figure 11 is that the operation control system of other DC excitation alternating current generators implements illustration.In this embodiment, the three-phase generation end of DC excitation alternating current generator (16) is connected to the input of PWM rectification part (31) by three-phase line, the AC rectification of input is that direct current is connected to inverting part (5) by positive and negative DC bus by PWM rectification part (31), and on positive and negative DC bus, is parallel with energy storage part (4) plays energy storage, filter action.DC inverter is that the three-phase alternating current of frequency-adjustable exports output transformer (7) to by three-phase line by inverting part 5, then by three-phase and four-line for electrical load provides required electric current.The DC excitation end of DC excitation alternating current generator (16) by positive and negative connection to the DC output end of DC excitation unit (91), the direct-flow input end of DC excitation unit (91) by positive and negative lines in parallel on the positive and negative DC bus between energy storage part (4) and inverting part (5).In this process, control part (10) provides the control signal of TGBT break-make for PWM rectification part (31) and inverting part (5).
Figure 12 is the principle assumption diagram of brushless ac compound rectifier excitation brshless DC motor of the present invention.This brushless ac compound rectifier excitation brshless DC motor (1), it comprises stator excitation winding (12), rotor (13), stator power winding (14), described rotor (13) comprises rotor field coil (131), rotating rectifier (132), rotor power Energizing unit (133), described rotor power Energizing unit (133) comprises direct current winding (1331) and permanent magnet (1332), and direct current winding (1331) is attached around permanent magnet (1332) is upper and both carry out compound rectifier excitation.
Further, described stator excitation winding (12) adopts AC frequency conversion excitation, by producing AC frequency conversion induction field at stator excitation winding (12) input frequency-changing AC electricity, the rotor field coil (131) in rotor (13) is made to produce alternating current, and be direct current by rotating rectifier (132) rectification, this direct current is that the direct current winding (1331) in rotor power Energizing unit (133) provides electric current to produce DC electromagnetic field.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection range that claims of the present invention determines.
Claims (6)
1. the operation control system of brushless ac compound rectifier excitation brshless DC motor, is characterized in that: it comprises rectification part (3), energy storage part (4), inverting part (5), sinusoidal filter (6), output transformer (7), load/master (8), AC frequency conversion excitation division (9), control part (10); wherein the stator power winding (14) of brushless ac compound rectifier excitation brshless DC motor is connected to the input of rectification part by three-phase line, the positive and negative DC bus output of rectification part (3) is connected to the positive and negative DC bus input of inverting part (5), and the positive and negative DC bus between rectification part (3) and inverting part (5) is parallel with energy storage part (4), the output of inverting part (5) is connected to the input of sinusoidal filter (6) by three-phase line, the output of sinusoidal filter (6) is connected to the three-phase input end of output transformer (7) by three-phase line, output transformer (7) is connected to load/master by three-phase and four-line circuit or three-phase line and sends out (8), stator excitation winding (12) is connected to the three-phase output end of AC frequency conversion excitation division (9) by three-phase line, the positive and negative DC bus input of AC frequency conversion excitation division (9) is parallel on the positive and negative DC bus between energy storage part (4) and inverting part (5), control part (10) provides control signal for inverting part (5) and AC frequency conversion excitation division (9).
2. operation control system according to claim 1, is characterized in that: this operation control system also comprises direct current reactor (2), when the brushless ac compound rectifier excitation brshless DC motor (1) in system is at upper employing six phase winding of its stator power winding (14), and when being divided into two groups 120 ° symmetrical three-phase star winding, system adopts two groups of three phase rectifier portions (3) to carry out six impulse commutations, two groups of direct current reactors (2) are connected between the DC bus output plus terminal of two groups of rectification part (3) and energy storage part (4) positive pole respectively all to be pressed the output voltage of two groups of rectification part (3), wherein first group of three-phase star winding connects the input of first group of rectification part (3) by three-phase line, the positive and negative DC bus output of rectification part (3) is connected to the positive and negative DC bus input of inverting part (5), positive and negative DC bus between rectification part (3) and inverting part (5) is parallel with energy storage part (4), and positive direct-current bus between rectification part (3) DC bus positive output end and energy storage part (4) positive pole is in series with first group of direct current reactor (2), second group of three-phase star winding of stator power winding (14) connects the input of second group of rectification part (3) by three-phase line, positive and negative DC bus between this group rectification part (3) and inverting part (5) is parallel with energy storage part (4), the positive and negative DC bus output of rectification part (3) is connected to the positive and negative DC bus input of inverting part (5), the positive and negative DC bus output of this group rectification part (3) is parallel to the both positive and negative polarity of energy storage part (4), and positive direct-current bus between this group rectification part (3) DC bus positive output end and energy storage part (4) positive pole is in series with second group of direct current reactor (2), the output of inverting part (5) is connected to the input of sinusoidal filter (6) by three-phase line, the output of sinusoidal filter (6) is connected to the three-phase input end of output transformer (7) by three-phase line, output transformer (7) is connected to load/master by three-phase and four-line circuit or three-phase line and sends out (8), the stator power winding (14) of motor is connected to the three-phase output end of the AC frequency conversion excitation division (9) of operational system by three-phase line, the positive and negative DC bus input of AC frequency conversion excitation division (9) is parallel on the positive and negative DC bus between energy storage part (4) and inverting part (5), control part (10) provides control signal for inverting part (5) and AC frequency conversion excitation division (9).
3. operation control system according to claim 1 and 2, it is characterized in that: this operation control system also comprises position detection unit (11), it is located at the position probing end of brushless ac compound rectifier excitation brshless DC motor (1), and for gathering motor rotor position signal and providing it to control part (10).
4. operation control system according to claim 3, it is characterized in that: AC frequency conversion excitation division (9) adopts three-phase IGBT entirely to control full bridge structure, by control part (10) for each IGBT provides make-and-break signal, wherein reverse parallel connection fly-wheel diode between the C pole of each IGBT and E pole, fly-wheel diode by E pole to C pole one-way conduction, afterflow effect is played when IGBT power switch pipe turns off, the positive and negative direct-flow input end of AC frequency conversion excitation division (9) is connected to positive and negative DC bus, and from power taking positive and negative DC bus as current source, entirely controlling full-bridge inverting by three-phase IGBT is AC frequency conversion exciting current, the stator power winding (14) that the three-phase output end of AC frequency conversion excitation division (9) is connected to brushless ac compound rectifier excitation brshless DC motor (1) by three-phase line produces AC frequency conversion excitation induction field.
5. operation control system according to claim 1, is characterized in that: rectification part (3) comprise in the uncontrollable rectification circuit of three phase full bridge diode, three phase full bridge thyristor half-controlled rectifier circuit, three phase full bridge IGBT half-controlled rectifier circuit, three phase full bridge thyristor all controlled rectifier circuit, three phase full bridge IGBT all controlled rectifier circuit one or more.
6. operation control system according to claim 5, it is characterized in that: inverting part (5) comprising: entirely control inverting part (51), inversion rectification part (52), inversion rectification part (52) is three phase full bridge IGBT, both be operated in the full control inversion of inverter mode, be also operated in the PWM rectification of rectification state; Control part (10) for entirely controlling inverting part (51), inversion rectification part (52), AC frequency conversion excitation division (9), PWM rectification part (31), commutation inversion portion (33) provide control signal; Energy storage part (4) comprising: the battery pack of DC/DC conversion, super capacitor, high-energy capacitor, electrochemical capacitor, lead acid accumulator, nickel-cadmium cell, Ni-MH battery, flow battery, sodium-sulphur battery, one or more in lithium ion battery, and annexation is the one in series, parallel, series-parallel connection; Load/master sends out (8) and comprising: electrical load (81) and main generator (82); Sinusoidal filter (6) is three-phase filter structure, is three-phase filter inductance L at its input, is parallel with three groups of RC capacitance-resistance in parallel of star-like connection or three groups of RC capacitance-resistances in parallel of angle-style connection at its output; Output transformer (7) comprising: phase three-wire three primary side to phase three-wire three secondary side and phase three-wire three primary side to three-phase and four-line secondary side two kinds of structures.When load/master sends out (8) employing electrical load (81), phase three-wire three primary side is three-phase input end, and three-phase and four-line secondary side is output and connects electrical load (81) by three-phase and four-line; When load/master sends out (8) employing main generator (82), phase three-wire three primary side is three-phase input end, and phase three-wire three secondary side is output and connects main generator (82) by three-phase line.
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Denomination of invention: Operation control system of brushless AC composite excitation brushless DC motor Effective date of registration: 20220221 Granted publication date: 20171003 Pledgee: Beijing first financing Company limited by guarantee Pledgor: BEIJING SWORD ELECTRIC INDUSTRIAL Co.,Ltd. Registration number: Y2022980001708 |
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Date of cancellation: 20230509 Granted publication date: 20171003 Pledgee: Beijing first financing Company limited by guarantee Pledgor: BEIJING SWORD ELECTRIC INDUSTRIAL Co.,Ltd. Registration number: Y2022980001708 |
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