CN110932519A - Two-phase hollow compensation pulse generator and method for realizing pulse discharge - Google Patents

Two-phase hollow compensation pulse generator and method for realizing pulse discharge Download PDF

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Publication number
CN110932519A
CN110932519A CN201911271936.7A CN201911271936A CN110932519A CN 110932519 A CN110932519 A CN 110932519A CN 201911271936 A CN201911271936 A CN 201911271936A CN 110932519 A CN110932519 A CN 110932519A
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phase
discharge
armature winding
phase armature
current
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游利
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K39/00—Generators specially adapted for producing a desired non-sinusoidal waveform
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
    • H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • 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
    • H02P31/00—Arrangements for regulating or controlling electric motors not provided for in groups H02P1/00 - H02P5/00, H02P7/00 or H02P21/00 - H02P29/00
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Abstract

A two-phase hollow compensation pulse generator and a method for realizing pulse discharge thereof relate to a hollow compensation pulse generator and a method for realizing pulse discharge thereof, and aim to solve the problem that the rotating speed of the existing hollow compensation pulse generator is restricted by the pulse width of output current. The stator armature winding of the motor adopts a two-phase structure, the electrical angles of the two-phase winding are orthogonally arranged, the output current of each phase is relatively independent, pulse current is output to a load after the two phases are parallelly superposed through respective rectifiers, and the pulse width is not limited by the half period of the motor any more; during discharging, the exciting winding induces current to compensate the armature winding, so that the internal inductance of the motor is reduced, and the amplitude of pulse current is improved; by controlling the trigger angle, the free component of the load current is eliminated, and the ideal trapezoidal wave pulse current is output. It is used for outputting pulse current.

Description

Two-phase hollow compensation pulse generator and method for realizing pulse discharge
Technical Field
The invention relates to an air-core compensation pulse generator and a method for realizing pulse discharge thereof, in particular to a two-phase air-core compensation pulse generator and a method for realizing pulse discharge thereof.
Background
The compensating pulse generator is a special synchronous generator, compensates the armature winding by utilizing the magnetic flux compression principle, reduces the equivalent inductance of the armature winding, can instantaneously output extremely large pulse current, integrates inertial energy storage, electromechanical energy conversion and pulse forming into a whole, has the comprehensive advantages of high overall efficiency, high energy density and power density and the like, and is an ideal pulse power supply of an electromagnetic transmitting device.
The new generation of compensation pulse generator widely adopts a hollow structure, and uses a composite material with high strength-density ratio to replace the traditional iron core, thereby improving the energy storage density and power density of the motor. However, the existing air-core compensation pulse generator generally adopts a single-phase structure, and discharges to a load by using the positive half cycle of output voltage, so that the rotating speed of the motor is restricted by the pulse width of output current, and if the pulse width required by the load is longer, the rotating speed of the motor must be reduced, and the stored energy of the motor cannot reach the required index. Due to the existence of the contradiction, the existing hollow-core compensation pulse generator needs to be optimized, so that the relation between the rotating speed of the motor and the pulse width of the output current can be decoupled, the advantages of the composite material are exerted, and the energy storage density and the power density of the motor are improved.
Disclosure of Invention
The invention aims to solve the problem that the rotating speed of the existing hollow-core compensation pulse generator is restricted by the pulse width of output current, and provides a two-phase hollow-core compensation pulse generator and a method for realizing pulse discharge.
The invention relates to a two-phase hollow compensation pulse generator, which comprises a stator, a rotor, a clutch, a slip ring and an electric brush;
the stator comprises a shell, an end cover, a hollow stator yoke, an A-phase armature winding and a B-phase armature winding; the hollow stator yoke is fixed on the inner wall of the shell, the phase A armature winding and the phase B armature winding are fixed on the inner wall of the hollow stator yoke, and the two end covers are respectively fixed at the two ends of the shell;
the rotor comprises a main shaft, a hollow rotor yoke, an excitation winding and a rotor bandage; the rotor is arranged in the shell and concentric with the stator, the hollow rotor yoke is sleeved on the outer surface of the main shaft, the outer surface of the hollow rotor yoke is adhered with an excitation winding, a rotor bandage is wound on the outer surface of the excitation winding, uniform air gaps are formed between the rotor bandage and the A-phase armature winding and between the rotor bandage and the B-phase armature winding, the tail end of the excitation winding is connected with an electric brush through a slip ring, the slip ring is fixed at one end of the main shaft, and the other end of the main shaft is used as a power input end and connected with a clutch.
The method for realizing pulse discharge of the two-phase hollow compensation pulse generator is realized based on a rectifying circuit and a control circuit, wherein the rectifying circuit comprises two groups of discharge rectifiers, two groups of self-excited rectifiers, a freewheeling diode, a start-up capacitor and a start-up semiconductor switch;
the discharge rectifier is a full bridge rectifier circuit consisting of 4 semiconductor switches,
the self-excitation rectifier and the discharge rectifier have the same structure;
two ends of the A-phase armature winding are simultaneously connected with the alternating current input ends of one group of discharge rectifiers and the alternating current input ends of one group of self-excitation rectifiers, and two ends of the B-phase armature winding are simultaneously connected with the alternating current input ends of the other group of discharge rectifiers and the alternating current input ends of the other group of self-excitation rectifiers;
the DC output ends of the two groups of discharge rectifiers are connected in parallel and then connected with a load, the DC output ends of the two groups of self-excited rectifiers are connected with a fly-wheel diode and an excitation winding of the rotor in parallel, wherein the cathodes of the fly-wheel diode are simultaneously connected with the anode of the DC output end of the self-excited rectifier, the anode of the DC output end is connected with the cathode of a start-up semiconductor switch, the anode of the start-up semiconductor switch is connected with one end of a start-up capacitor, and the other end of the start-up capacitor is connected with the anode of the fly-;
the method for realizing pulse discharge of the two-phase air-core compensation pulse generator comprises the following steps:
the method comprises the following steps: a prime motor is adopted to drag the main shaft of the rotor to rotate through a clutch, and after the generator is dragged to a rated rotating speed, the prime motor is separated from the main shaft of the rotor by controlling the clutch;
step two: the control circuit controls a starting semiconductor switch in the rectifying circuit to be in a conducting state, and outputs gate control signals to the two groups of self-excited rectifiers to enable the excitation windings to generate excitation current so as to form a positive feedback self-excitation process;
the control circuit monitors the current of the excitation winding, the terminal voltage of the A-phase armature winding and the terminal voltage of the B-phase armature winding, when the current and the terminal voltage reach rated values, the control circuit stops outputting gate control signals to the two groups of self-excited rectifiers to stop the two groups of self-excited rectifiers, the excitation winding is in follow current short circuit through a fly-wheel diode, the trigger angle of the discharge rectifier is set to be α, α is more than or equal to 0 degrees and less than or equal to 180 degrees, and gate control signals are started to be output to the two groups of discharge rectifiers to enable the A-phase armature winding and the B-phase armature winding to discharge to a load;
step four: the control circuit monitors the discharge current pulse widths of the A-phase armature winding and the B-phase armature winding, when the current pulse widths reach a set value, the control circuit stops outputting gate control signals to the two groups of discharge rectifiers, and the discharge process is finished after the currents of the A-phase armature winding and the B-phase armature winding cross zero.
The invention has the advantages that: the motor adopts a two-phase structure, is respectively rectified and then is connected in parallel to discharge to a load, and the free component of the load current is eliminated by controlling the trigger angle through the discharge rectifier, so that the two-phase current is superposed to form ideal trapezoidal pulse current, the discharge duration is not limited by the half period of the motor any more, the restriction contradiction between the rotating speed of the motor and the pulse width of the output current is decoupled, the energy density and the power density of the motor are improved, and the miniaturization of the pulse power supply is realized.
Drawings
Fig. 1 is an axial cross-sectional view of the two-phase air-core compensated pulse generator of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
FIG. 3 is a schematic diagram of a rectifying circuit structure in a method for realizing pulse discharge of the two-phase air-core compensation pulse generator according to the present invention.
Detailed Description
The first embodiment is as follows: the two-phase air-core compensation pulse generator of the invention, which is described in conjunction with fig. 1 and 2, comprises a stator, a rotor, a clutch 8, a slip ring 12 and a brush 13;
the stator comprises a shell 5, an end cover 4, a hollow stator yoke 9, an A-phase armature winding 1 and a B-phase armature winding 2; the hollow stator yoke 9 is fixed on the inner wall of the shell 5, the A-phase armature winding 1 and the B-phase armature winding 2 are fixed on the inner wall of the hollow stator yoke 9, and the two end covers 4 are respectively fixed at the two ends of the shell 5;
the rotor comprises a main shaft 7, a hollow rotor yoke 11, an excitation winding 3 and a rotor bandage 10; the rotor is arranged in the machine shell 5 and is concentric with the stator, the hollow rotor yoke 11 is sleeved on the outer surface of the main shaft 7, the excitation winding 3 is adhered to the outer surface of the hollow rotor yoke 11, a rotor bandage 10 is wound on the outer surface of the excitation winding 3, an even air gap is formed between the rotor bandage 10 and the A-phase armature winding 1 and between the rotor bandage 10 and the B-phase armature winding 2, the tail end of the excitation winding 3 is connected with an electric brush 13 through a slip ring 12, the slip ring 12 is fixed at one end of the main shaft 7, and the other end of the main shaft 7 is used as a power input end and connected.
The motor of the embodiment adopts a rotary excitation type, the exciting current is introduced into the rotor exciting winding 3 through the electric brush 13 and the slip ring 12, and the exciting current is far less than the armature current, so compared with the rotary armature type, the structure reduces the manufacturing and model selection difficulty of the electric brush 13 and the slip ring 12; the motor adopts a four-pole structure, so that the internal stress distribution is more uniform compared with a two-pole structure motor, and all stress parts in the motor are easier to fix; the motor adopts a two-phase structure, and the rotating speed and the pulse width of the motor are decoupled by pulse modulation and molding of two-phase current, so that the rotating speed of the motor is improved; the motor is a full hollow motor, ferromagnetic materials are not contained in the motor, and the hollow stator yoke 9 and the hollow rotor yoke 11 which are main supporting parts are both made of composite materials, so that a magnetic circuit of the motor is not limited by saturation, the mass of the motor is reduced, and the energy density and the power density of the motor are improved.
The motor is applied to the field of electromagnetic emission and can be used as a pulse power supply of an electromagnetic rail gun; the method decouples the restriction relation between the rotating speed of the motor and the pulse width of the output current, obviously improves the rotating speed of the motor, effectively utilizes the characteristic of high specific strength of the composite material, and has the advantages of high overall efficiency, high energy density and power density and the like.
The second embodiment is as follows: the present embodiment is further limited to the two-phase air-core compensation pulse generator according to the first embodiment, wherein the a-phase armature windings 1 and the B-phase armature windings 2 are arranged in a staggered manner along the circumference, and the electrical angles of the a-phase armature windings 1 and the B-phase armature windings are different by 90 °.
The electric angles of the two-phase armature windings of the motor are orthogonally arranged, and magnetic field coupling does not exist, so that the two-phase windings cannot mutually induce current during discharging, each phase of output current is relatively independent, and pulse forming is facilitated, so that ideal trapezoidal wave pulse current required by the rail gun is output.
The third concrete implementation mode: in this embodiment, the two-phase air-core compensation pulse generator according to the first embodiment is further limited, the a-phase armature winding 1 and the B-phase armature winding 2 adopt slotless concentric windings, the coils forming the windings are formed by winding multiple litz wires in parallel, and the multiple coils are connected in parallel to form the windings.
The A-phase armature winding 1 and the B-phase armature winding 2 are wound by litz wires in parallel, so that the skin effect during discharging can be effectively weakened, the internal resistance of the motor is reduced, and the efficiency of the motor is improved; the armature winding coil is molded by means of a mold and epoxy resin, and the epoxy resin plays a role in shaping and reinforcing; for the winding with a slotless structure, the winding is easier to wind and arrange by adopting a concentric mode.
The fourth concrete implementation mode: in this embodiment, the two-phase air-core compensated pulse generator according to the first embodiment is further limited, wherein the air-core stator yoke 9 and the air-core rotor yoke 11 are formed by winding glass fiber epoxy resin.
The cylindrical hollow stator yoke 9 and the hollow rotor yoke 11 are formed by winding glass fiber epoxy resin on a die, and because the composite material cannot bear the high temperature of the traditional hot-sleeving process, the hollow stator yoke 9, the machine shell 5 and the two-phase armature winding, and the hollow rotor yoke 11, the main shaft 7 and the excitation winding 3 are bonded by high-strength epoxy resin.
The fifth concrete implementation mode: this embodiment is further limited to the two-phase air-core compensated pulse generator according to the first embodiment, wherein the rotor bandage 10 is wound and cured by carbon fiber epoxy resin.
The most advantage of the hollow core structure is the high energy storage density of the motor, mainly because the composite material of the hollow core machine has higher strength than the silicon steel sheet of the iron core machine, so that the hollow core machine has higher linear speed of the rotor. A layer of carbon fiber epoxy resin bandage is wound on the outermost edge of the rotor, so that the centrifugal force generated by high-speed rotation can be effectively overcome, and all parts of the rotor can be reliably fixed.
The sixth specific implementation mode: the embodiment is described with reference to fig. 3, and the embodiment is a method for realizing pulse discharge based on the two-phase air-core compensation pulse generator described in the first embodiment, and is realized based on a rectifying circuit and a control circuit, wherein the rectifying circuit includes two groups of discharge rectifiers 14, two groups of self-excited rectifiers 15, a freewheeling diode 17, a start-up capacitor 18 and a start-up semiconductor switch 19;
the discharge rectifier 14 is a full bridge rectifier circuit consisting of 4 semiconductor switches,
the self-excitation rectifier 15 and the discharge rectifier 14 have the same structure;
two ends of the A-phase armature winding 1 are simultaneously connected with the alternating current input ends of one group of discharge rectifiers 14 and the alternating current input ends of one group of self-excitation rectifiers 15, and two ends of the B-phase armature winding 2 are simultaneously connected with the alternating current input ends of the other group of discharge rectifiers 14 and the alternating current input ends of the other group of self-excitation rectifiers 15;
the DC output ends of the two groups of discharge rectifiers 14 are connected in parallel and then connected with a load, the DC output ends of the two groups of self-excited rectifiers 15 are connected with a fly-wheel diode 17 and an excitation winding 3 of the rotor in parallel, wherein the cathode of the fly-wheel diode 17 is simultaneously connected with the anode of the DC output end of the self-excited rectifier 15, the anode of the DC output end is connected with the cathode of a start-up semiconductor switch 19, the anode of the start-up semiconductor switch 19 is connected with one end of a start-up capacitor 18, and the other end of the start-up capacitor 18 is connected with the anode of the fly;
the method for realizing pulse discharge of the two-phase air-core compensation pulse generator comprises the following steps:
the method comprises the following steps: dragging the main shaft 7 of the rotor to rotate by a prime motor through a clutch 8, dragging the generator to a rated rotating speed, and then disengaging the prime motor from the main shaft 7 of the rotor by controlling the clutch 8;
step two: the control circuit controls a starting semiconductor switch 19 in the rectifying circuit to be in a conducting state, and outputs gate control signals to the two groups of self-excited rectifiers 15 to enable the excitation winding 3 to generate excitation current so as to form a self-excitation process of positive feedback;
the control circuit monitors the current of the excitation winding 3, the terminal voltage of the A-phase armature winding 1 and the terminal voltage of the B-phase armature winding 2, when the current and the terminal voltage reach rated values, the control circuit stops outputting gate control signals to the two groups of self-excited rectifiers 15 to stop the two groups of self-excited rectifiers 15, the excitation winding 3 carries out follow current short circuit through a fly-wheel diode 17, the trigger angle of the discharge rectifier 14 is set to be α, α is more than or equal to 0 degrees and less than or equal to 180 degrees, and gate control signals are started to be output to the two groups of discharge rectifiers 14 to enable the A-phase armature winding 1 and the B-phase armature winding 2 to discharge to a load;
step four: the control circuit monitors the discharge current pulse widths of the A-phase armature winding 1 and the B-phase armature winding 2, when the current pulse widths reach a set value, the control circuit stops outputting gate control signals to the two groups of discharge rectifiers 14, and the discharge process is finished after the currents of the A-phase armature winding 1 and the B-phase armature winding 2 cross zero.
When the motor works, after the motor main shaft 7 is dragged to a rated rotating speed by the prime motor, the control system gives a control signal to the clutch 8 to disconnect the prime motor from the rotor main shaft 7, and the motor rotor continues to rotate by means of inertia. The control system outputs signals to close a starting semiconductor switch 19, a starting capacitor 18 supplies seed current to the rotor excitation winding 3 through an electric brush 13 and a slip ring 12 to generate an initial main pole magnetic field, the two-phase armature winding cuts magnetic line induction voltage, the two-phase armature winding is respectively connected in parallel to the input end of the electric brush 13 through respective self-excitation rectifiers 15, and direct-current excitation current is supplied to the rotor excitation winding 3. When the motor is designed, the armature winding and the excitation winding are reasonably matched, so that the self-excitation process of positive feedback is realized.
The voltage and current transformer is used for collecting the armature winding voltage and the exciting winding current, when the rated value is reached, the control system stops outputting gate pole control signals to the self-excited rectifier 15, the rectifier bridge stops, the exciting current flows through the fly-wheel diode 17, and meanwhile, the two groups of discharge rectifiers 14 are started to discharge to the load. According to the zero-state response theory of sinusoidal voltage excitation in the circuit, the load current will consist of a sine forced component and a free component gradually approaching zero, and the pulse generator generally expects the load current to have only the forced component in order to make the output current waveform smoother, so the trigger angle of the discharge rectifier 14 needs to be controlled. Because the reactance of the armature winding is generally far larger than the resistance, the circuit is mainly inductive, according to the circuit theory, the trigger angles of the two-phase armature winding are set to be 90 degrees, so that the free component can be effectively inhibited, each phase outputs a relatively independent sinusoidal current waveform, and pulse modulation is easier to perform to form a relatively ideal waveform. When discharging, the exciting winding 3 with diode freewheeling short circuit and the armature winding couple induction current to provide compensation for the armature winding and reduce the equivalent inductance of the armature winding, thereby outputting pulse current with larger amplitude.
After the required current pulse width is reached, the control system stops giving a gate control signal to the discharge rectifier 14, the discharge process is finished after the zero crossing of the current of the two-phase armature winding, the energy recovery process is started, the control system controls the self-excitation rectifier 15 to work in an inversion state, the motor runs electrically at the moment, the rotating speed of the motor is increased, and the electric energy stored by the excitation winding is converted into the kinetic energy of the motor to prepare for the next discharge.
Seventh embodiment, this embodiment is a further limitation of the method for implementing pulse discharge in the two-phase air-core compensated pulse generator according to the sixth embodiment, and the firing angle α of the discharge rectifier 14 is equal to 90 °.
The specific implementation mode is eight: the present embodiment is further limited to the method for implementing pulse discharge in the two-phase air-core compensation pulse generator according to the sixth embodiment, and is characterized in that the control circuit is implemented by a PLC or a single chip microcomputer.
The specific implementation method nine: in this embodiment, the method for implementing pulse discharge in the two-phase air-core compensated pulse generator according to the sixth embodiment is further limited, and the control circuit monitors the current of the excitation winding 3 and implements pulse discharge by using a current sensor.
The detailed implementation mode is ten: in this embodiment, the method for implementing pulse discharge in the two-phase air-core compensation pulse generator according to the sixth embodiment is further limited, and the monitoring of the terminal voltage of the a-phase armature winding 1 and the terminal voltage of the B-phase armature winding 2 by the control circuit is implemented by a voltage sensor.
The real-time data of the motor is collected through the voltage sensor, the current sensor and the speed sensor, and each switching tube is controlled according to corresponding data and time sequence, so that the processes of starting, self-excitation, discharging and energy recovery of the motor are controlled.

Claims (9)

1. The two-phase hollow compensation pulse generator comprises a stator, a rotor, a clutch (8), a slip ring (12) and an electric brush (13);
the stator comprises a shell (5), an end cover (4), a hollow stator yoke (9), an A-phase armature winding (1) and a B-phase armature winding (2); the hollow stator yoke (9) is fixed on the inner wall of the shell (5), the A-phase armature winding (1) and the B-phase armature winding (2) are fixed on the inner wall of the hollow stator yoke (9), and the two end covers (4) are respectively fixed at two ends of the shell (5);
the rotor comprises a main shaft (7), a hollow rotor yoke (11), an excitation winding (3) and a rotor bandage (10); the rotor is arranged in the machine shell (5) and is concentric with the stator, the hollow rotor yoke (11) is sleeved on the outer surface of the main shaft (7), the excitation winding (3) is adhered to the outer surface of the hollow rotor yoke (11), a rotor bandage (10) is wound on the outer surface of the excitation winding (3), an even air gap is formed between the rotor bandage (10) and the A-phase armature winding (1) and between the rotor bandage (10) and the B-phase armature winding (2), the tail end of the excitation winding (3) is connected with an electric brush (13) through a slip ring (12), the slip ring (12) is fixed at one end of the main shaft (7), and the other end of the main shaft (7) is used as a power input end and is connected with the clutch;
the method for realizing pulse discharge of the two-phase hollow compensation pulse generator is characterized by being realized based on a rectifying circuit and a control circuit, wherein the rectifying circuit comprises two groups of discharge rectifiers (14), two groups of self-excitation rectifiers (15), a fly-wheel diode (17), a starting capacitor (18) and a starting semiconductor switch (19);
the discharge rectifier (14) is a full bridge rectifier circuit consisting of 4 semiconductor switches,
the self-excitation rectifier (15) and the discharge rectifier (14) have the same structure;
two ends of the A-phase armature winding (1) are simultaneously connected with the alternating current input ends of one group of discharge rectifiers (14) and the alternating current input ends of one group of self-excitation rectifiers (15), and two ends of the B-phase armature winding (2) are simultaneously connected with the alternating current input ends of the other group of discharge rectifiers (14) and the alternating current input ends of the other group of self-excitation rectifiers (15);
the DC output ends of the two groups of discharge rectifiers (14) are connected in parallel and then connected with a load, the DC output ends of the two groups of self-excited rectifiers (15) are connected with a fly-wheel diode (17) and an excitation winding (3) of the rotor in parallel, wherein the cathodes of the fly-wheel diode (17) are simultaneously connected with the cathodes of the DC output ends of the two groups of self-excited rectifiers (15), the cathodes of the DC output ends of the two groups of self-excited rectifiers (15) are simultaneously connected with the cathode of a start-up semiconductor switch (19), the anode of the start-up semiconductor switch (19) is connected with one end of a start-up capacitor (18), and the other end of the start-up capacitor (18) is connected with the anode of the;
the method for realizing pulse discharge of the two-phase air-core compensation pulse generator comprises the following steps:
the method comprises the following steps: a prime motor is adopted to drag a main shaft (7) of a rotor to rotate through a clutch (8), and after the generator is dragged to a rated rotating speed, the prime motor is separated from the main shaft (7) of the rotor by controlling the clutch (8);
step two: the control circuit controls a starting semiconductor switch (19) in the rectifying circuit to be in a conducting state, and outputs gate control signals to the two groups of self-excited rectifiers (15) to enable the excitation winding (3) to generate excitation current so as to form a positive feedback self-excitation process;
the control circuit monitors the current of the excitation winding (3), the terminal voltage of the A-phase armature winding (1) and the terminal voltage of the B-phase armature winding (2), when the current and the terminal voltage reach rated values, the control circuit stops outputting gate control signals to the two groups of self-excited rectifiers (15) to stop the two groups of self-excited rectifiers (15), the excitation winding (3) is subjected to follow current short circuit through a follow current diode (17), the trigger angle of the discharge rectifier (14) is set to be α, α is more than or equal to 0 degrees and less than or equal to 180 degrees, and gate control signals are started to be output to the two groups of discharge rectifiers (14) to enable the A-phase armature winding (1) and the B-phase armature winding (2) to discharge to a load;
step four: the control circuit monitors the discharging current pulse width of the A-phase armature winding (1) and the B-phase armature winding (2), when the current pulse width reaches a set value, the control circuit stops outputting gate control signals to the two groups of discharging rectifiers (14), and the discharging process is finished after the current of the A-phase armature winding (1) and the current of the B-phase armature winding (2) cross zero.
2. The method for realizing pulse discharge of the two-phase air-core compensation pulse generator according to claim 1, wherein the A-phase armature windings (1) and the B-phase armature windings (2) in the two-phase air-core compensation pulse generator are arranged in a staggered manner along the circumference, and the electrical angles of the A-phase armature windings (1) and the B-phase armature windings (2) are different by 90 degrees.
3. The method for realizing pulse discharge of the two-phase air-core compensation pulse generator according to claim 1, wherein the A-phase armature winding (1) and the B-phase armature winding (2) in the two-phase air-core compensation pulse generator adopt slotless concentric windings, the coils forming the windings are formed by winding a plurality of litz wires in parallel, and a plurality of coils are connected in parallel to form the windings.
4. The method for realizing pulse discharge of the two-phase air-core compensation pulse generator according to claim 1, wherein the air-core stator yoke (9) and the air-core rotor yoke (11) in the two-phase air-core compensation pulse generator are wound by glass fiber epoxy resin.
5. The method for realizing pulse discharge of the two-phase hollow-core compensation pulse generator according to claim 1, wherein the rotor bandage (10) in the two-phase hollow-core compensation pulse generator is formed by winding and curing carbon fiber epoxy resin.
6. The method of pulse discharge for two-phase air-core compensated pulse generator as claimed in claim 1, wherein the firing angle α of the discharge rectifier (14) is equal to 90 °.
7. The method for realizing pulse discharge of the two-phase air-core compensation pulse generator according to claim 1, wherein the control circuit is realized by a PLC or a single chip microcomputer.
8. The method for realizing pulse discharge of the two-phase air-core compensation pulse generator according to claim 1, wherein the control circuit monitors the current of the excitation winding (3) and is realized by a current sensor.
9. The method for realizing pulse discharge of the two-phase air-core compensation pulse generator according to claim 1, wherein the control circuit monitors the terminal voltage of the A-phase armature winding (1) and the terminal voltage of the B-phase armature winding (2) through voltage sensors.
CN201911271936.7A 2019-12-12 2019-12-12 Two-phase hollow compensation pulse generator and method for realizing pulse discharge Pending CN110932519A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115811186A (en) * 2022-12-20 2023-03-17 滁州市博创电气有限公司 CBC-MC module circuit and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115811186A (en) * 2022-12-20 2023-03-17 滁州市博创电气有限公司 CBC-MC module circuit and method

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