CN204392129U - A kind of error-tolerance type Instantaneous torque control asynchronous machine power generation system - Google Patents
A kind of error-tolerance type Instantaneous torque control asynchronous machine power generation system Download PDFInfo
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Abstract
The utility model provides a kind of error-tolerance type Instantaneous torque control asynchronous machine power generation system, comprises main circuit, initial field circuit, testing circuit and control circuit; Main circuit comprises asynchronous machine, error-tolerance type converter, the first bus capacitor, the second bus capacitor; Error-tolerance type converter is made up of three-phase brachium pontis and a bidirectional thyristor; Asynchronous machine power generation system becomes two-phase four switch converters at fault-tolerant rear error-tolerance type converter from three-phase six switch converters, as long as the feature according to two-phase four switch converters voltage vector redesigns new optimal voltage vector option table, just can continue to realize quick control to asynchronous machine power generation system instantaneous torque, make fault-tolerant after the advantage that asynchronous machine power generation system retentive control algorithm is simple, little by motor parameter influence, dynamic characteristic is good.The utility model is reasonable in design, circuit structure is simple, and cost increases limited, substantially increases the functional reliability of asynchronous machine power generation system.
Description
Technical field
The utility model relates to a kind of error-tolerance type Instantaneous torque control asynchronous machine power generation system, is applicable to the occasion higher to generating reliability requirement, belongs to motor control technology field.
Background technology
The asychronous motor electricity generation system be bonded by converters and asynchronous machine, adopt advanced control technology, performance comparatively conventional asynchronous generator is improved greatly, and thus it has become the ideal chose of the novel airbornes such as aircraft, automobile, tank, vehicle-mounted independent electric power supply.
As the power-supply system of application in aviation, military affairs, reliability is the problem first must considered, fault-toleranr technique improves the strong guarantee of reliability.In the new power generating system be bonded by converters and asynchronous machine, converters can improve electricity generation system performance greatly, but it is also the weak link easily broken down in system.Once break down, whole electricity generation system will lose the ability of normal work, and this can bring economic loss in general civilian occasion, and in the important events such as aviation, military affairs, to catastrophic failure be caused, and therefore carry out electricity generation system fault-tolerance study and have important practical significance.
Adopt the asynchronous machine power generation system of Instantaneous torque control because dynamic property is excellent especially, at impact, the Dynamic-Recovery time of dashing forward when unloading load is less than the 30ms that American army mark requires, the requirement of telex system and senior instrument uninterrupted power supply can be met well, thus as aircraft, tank, warship, there is application prospect the independent current source pole of the motion carriers such as steamer, authorized Chinese invention patent: the squirrel cage induction motor converters DC start/electricity generation system of Instantaneous torque control, publication number: CN 1396705A, disclose composition and the control method of the asynchronous machine power generation system of Instantaneous torque control, but this patent has only invented hardware circuit when Instantaneous torque control asynchronous machine power generation system normally runs and control method, do not consider the fault tolerant technique of system.
In order to improve the reliability of Instantaneous torque control asynchronous machine power generation system, making it really meet the requirement of aircraft, tank, warship, the contour reliability Work occasion of steamer, the fault-toleranr technique of this system being studied very necessary.
Utility model content
The purpose of this utility model is to provide that a kind of power demand device is few, hardware circuit is simple, cost is low, reliability is high, can realize power tube open circuit and the fault-tolerant Instantaneous torque control asynchronous machine power generation system of short trouble.
For achieving the above object, the technical solution of the utility model is: a kind of error-tolerance type Instantaneous torque control asynchronous machine power generation system, comprises main circuit, initial field circuit, testing circuit and control circuit;
Described main circuit comprises asynchronous machine, error-tolerance type converter, the first bus capacitor, the second bus capacitor; Error-tolerance type converter comprises first-phase brachium pontis, second-phase brachium pontis, third phase brachium pontis and a bidirectional thyristor; First-phase brachium pontis is composed in series by the first fuse, the first power tube, the second power tube and the second fuse, second-phase brachium pontis is composed in series by the 3rd fuse, the 3rd power tube, the 4th power tube and the 4th fuse, and third phase brachium pontis is composed in series by the 5th fuse, the 5th power tube, the 6th power tube and the 6th fuse; The negative pole of the first bus capacitor is connected with the positive pole of the second bus capacitor; The positive pole of three-phase brachium pontis is connected with the positive pole of the first bus capacitor, as the positive pole that DC power supply exports; The negative pole of three-phase brachium pontis is connected with the negative pole of the second bus capacitor, as the negative pole that DC power supply exports; Three-phase brachium pontis mid point connects the leading-out terminal of asynchronous machine three-phase windings respectively; Bidirectional thyristor is connected between the tie point of asynchronous machine neutral point and the first bus capacitor and the second bus capacitor;
Described initial field circuit comprises diode and low pressure accessory power supply, and the anode of diode is connected with the positive pole of low pressure accessory power supply; The negative electrode of diode connects the positive pole of DC power supply output, and the negative pole of low pressure accessory power supply connects the negative pole of DC power supply output;
Described testing circuit comprises current sensor, voltage sensor, A/D converter, current sensor is three AC Hall current sensors, and three wires being connected to asynchronous machine three-phase windings output and error-tolerance type converter three-phase brachium pontis mid point are each passed through three current sensors; Voltage sensor is a direct current Hall voltage transducer, and its input is connected in parallel on the positive and negative polar curve of DC power supply output; Current sensor is all connected with the input end of analog signal of A/D converter with the output of voltage sensor; The direct voltage analog signal that the three-phase alternating current analog signal that current sensor obtains, voltage sensor obtain all sends into the input end of analog signal of A/D converter, and input analog signal is converted to digital signal and exports by A/D converter;
Described control circuit comprises digital signal processor, drive circuit, the input of digital signal processor is connected with A/D converter digital signal output end, its output is connected with the input of drive circuit, and the output of drive circuit connects to the grid of the 6th power tube and the control pole of bidirectional thyristor with the first power tube of error-tolerance type converter in main circuit.
The utility model has following Advantageous Effects: in the existing electricity generation system be made up of three-phase six switch converters and asynchronous machine, increase the hardware driving circuit of a bidirectional thyristor, six fuses and a road thyristor, just achieve the common power tube open circuit of three-phase six switch converters and short trouble fault-tolerant, it is reasonable in design, circuit structure is simple, cost increases limited, substantially increases the functional reliability of asynchronous machine power generation system; And, asynchronous machine power generation system becomes two-phase four switch converters at fault-tolerant rear error-tolerance type converter from three-phase six switch converters, as long as the feature according to two-phase four switch converters voltage vector redesigns new optimal voltage vector option table, just can continue to realize quick control to asynchronous machine power generation system instantaneous torque, make fault-tolerant after the advantage that asynchronous machine power generation system retentive control algorithm is simple, little by motor parameter influence, dynamic characteristic is good.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is the main circuit diagram of the utility model when normally working;
Fig. 3 is that in the utility model first-phase brachium pontis, one of power tube breaks down, and converter fault-tolerant be after two-phase four switch converters, the main circuit diagram of system;
Fig. 4 (a) for one of power tube in the utility model first-phase brachium pontis break down, converter is fault-tolerant for after two-phase four switch converters, four voltage vectors of system;
Fig. 4 (b) for one of power tube in the utility model second-phase brachium pontis break down, converter is fault-tolerant for after two-phase four switch converters, four voltage vectors of system;
Fig. 4 (c) for one of power tube in the utility model third phase brachium pontis break down, converter is fault-tolerant for after two-phase four switch converters, four voltage vectors of system;
Fig. 5 is that in the utility model first-phase brachium pontis, one of power tube breaks down, converter is fault-tolerant is after two-phase four switch converters, se ctor partition and θ
1in sector, voltage vector is to the regulating action schematic diagram of magnetic linkage and torque;
Fig. 6 is that the utility model normally runs and the given schematic diagram of fault-tolerant rear torque.
In figure: 1 is asynchronous machine, 2 is error-tolerance type converter, and 3 is the first bus capacitor, and 4 is the second bus capacitor, 5 is diode, and 6 is low pressure accessory power supply, and 7 is current sensor, 8 be voltage sensor, 9 for A/D converter, 10 is digital signal processor, and 11 is drive circuit.2.1 is first-phase brachium pontis, and 2.2 is second-phase brachium pontis, and 2.3 is third phase brachium pontis; T1 ~ T6 is the first ~ six power tube, and F1 ~ F6 is the first ~ six fuse, and TRn is bidirectional thyristor, i
a, i
b, i
cfor motor a, b, c three-phase current, U
dcfor output dc voltage; V
0(00), V
1(01), V
2(10), V
3(11) be voltage vector; θ
1~ θ
4for four sectors that stator magnetic linkage plane of movement is divided equally, ψ
sfor stator magnetic linkage, ψ
rfor rotor flux, δ is stator magnetic linkage ψ
slag behind rotor flux ψ
rangle; T
e *for torque set-point, T
e *' be the filter value of torque set-point.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
A kind of error-tolerance type Instantaneous torque control asynchronous machine power generation system described in the utility model, as shown in Figure 1, comprises main circuit, initial field circuit, testing circuit and control circuit;
Described main circuit is made up of asynchronous machine 1, error-tolerance type converter 2, first bus capacitor 3, second bus capacitor 4; Error-tolerance type converter 2 comprises three-phase brachium pontis 2.1,2.2,2.3 and bidirectional thyristor TRn; First-phase brachium pontis 2.1 is composed in series by the first fuse F1, the first power tube T1, the second power tube T2 and the second fuse F2, second-phase brachium pontis 2.2 is composed in series by the 3rd fuse F3, the 3rd power tube T3, the 4th power tube T4 and the 4th fuse F4, and third phase brachium pontis 2.3 is composed in series by the 5th fuse F5, the 5th power tube T5, the 6th power tube T6 and the 6th fuse F6; The negative pole of the first bus capacitor 3 is connected with the positive pole of the second bus capacitor 4; The positive pole of three-phase brachium pontis 2.1,2.2,2.3 is connected with the positive pole of the first bus capacitor 3, as the positive pole that DC power supply exports; The negative pole of three-phase brachium pontis 2.1,2.2,2.3 is connected with the negative pole of the second bus capacitor 4, as the negative pole that DC power supply exports; Three-phase brachium pontis 2.1,2.2,2.3 mid point connects the leading-out terminal of asynchronous machine 1 three-phase windings respectively; Bidirectional thyristor TRn is connected between the tie point of asynchronous machine 1 neutral point and bus capacitor 3,4; Power tube T1 ~ T6 is the IGBT power tube being parallel with body diode, and fuse F1 ~ F6 is fast acting fuse;
Described initial field circuit comprises diode 5, low pressure accessory power supply 6, and the anode of diode 5 is connected with the positive pole of low pressure accessory power supply 6, and its negative electrode connects the positive pole that DC power supply exports; The negative pole of low pressure accessory power supply 6 connects the negative pole of DC power supply output.Low pressure accessory power supply 6 is 12V or 24V storage battery, and three-phase six switch converters that it is formed through diode 5 and three-phase brachium pontis 2.1,2.2 and 2.3 provides initial exciting voltage to asynchronous machine 1, and the voltage that excitation asynchronous machine 1 sends increases gradually.The three-phase alternating voltage that asynchronous machine 1 sends through the rectification of three-phase six switch converters, then through the filter action of the first bus capacitor 3 and the second bus capacitor 4, output dc voltage; When the direct voltage exported exceedes the voltage of low pressure accessory power supply 6, diode 5 blocking effects, make low pressure accessory power supply 6 naturally depart from asynchronous machine power generation system;
Described testing circuit comprises current sensor 7, voltage sensor 8 and analog to digital converter 9; Current sensor 7 is three AC Hall current sensors, three wires being connected to asynchronous machine three-phase windings output and error-tolerance type converter three-phase brachium pontis mid point are each passed through three current sensors 7, and current sensor 7 is by the interchange heavy current signal i of asynchronous machine 1 three-phase windings
a, i
b, i
cconvert weak voltage analog signal to; Voltage sensor 8 is a direct current Hall voltage transducer, and its input is connected in parallel on the positive and negative polar curve of DC power output end; Current sensor 7 is all connected with the input end of analog signal of A/D converter 9 with the output of voltage sensor 8; The weak voltage analog signal that current sensor 7 and voltage sensor 8 obtain accesses the input end of analog signal of A/D converter, and input analog signal is converted to digital signal and exports by A/D converter; Adopt current sensor 7 and voltage sensor 8 can make testing circuit while carrying out accurate information detection, make control circuit and main circuit realize reliable electrical isolation;
Described control circuit comprises digital signal processor 10, drive circuit 11, and the input of digital signal processor 10 is connected with the output of A/D converter 9, and its output is connected with the input of drive circuit 11, the output of drive circuit 11 connects with the base stage of power tube T1 ~ T6 in main circuit and the control pole of bidirectional thyristor TRn, the digital signal that digital signal processor 10 inputs according to analog to digital converter 9---three-phase current information and main circuit information of voltage, when asynchronous machine power generation system normally runs, according to the Instantaneous torque control method of the electricity generation system that existing conventional three-phase six switch converters and asynchronous machine are formed, calculate the control signal issuing error-tolerance type converter, when asynchronous machine power generation system fault-tolerant operation, according to the Instantaneous torque control method of the electricity generation system that two-phase four switch converters that the utility model proposes and asynchronous machine form, calculate the control signal issuing error-tolerance type converter, the control signal of error-tolerance type converter, through the drive amplification of overdrive circuit 11, is delivered to the grid of six power tube T1 ~ T6 and the control pole of bidirectional thyristor TRn, is carried out the faults-tolerant control of asynchronous machine power generation system.
The control method of a kind of error-tolerance type Instantaneous torque control asynchronous machine power generation system described in the utility model:
When asynchronous machine power generation system normally runs, as shown in Figure 2, three-phase brachium pontis 2.1,2.2,2.3 works its main circuit, bidirectional thyristor TRn does not work, the three-phase alternating current that asynchronous machine 1 sends, after the rectification of three-phase six switch converters, becomes direct current and exports;
When there is open fault in a power tube in a certain phase brachium pontis, testing circuit detect a certain phase current in three-phase current be zero time reach half current cycle, control circuit disconnects the drive singal of two power tubes in this phase brachium pontis accordingly, then bidirectional thyristor TRn conducting is triggered, two-phase four switch converters that asynchronous machine is made up of other two-phase brachium pontis and bidirectional thyristor TRn controls, and continues fault-tolerant generator operation.Open fault is there is below for power tube T1 in first-phase brachium pontis 2.1 (or power tube T2), as shown in Figure 3, control circuit disconnects the drive singal of power tube T1, T2, trigger bidirectional thyristor TRn conducting, two-phase four switch converters be made up of bidirectional thyristor TRn, second-phase brachium pontis 2.2 and third phase brachium pontis 2.3 controls asynchronous machine 1 and continues generator operation simultaneously;
When there is short trouble in a power tube in a certain phase brachium pontis, two fuses on complementary power pipe on same phase brachium pontis, this brachium pontis and the first bus capacitor 3, second bus capacitor 4 can form short-circuit loop, two fuses are because overcurrent is fused, this brachium pontis is disconnected from the circuit, short trouble is converted into open fault automatically, recycles above-mentioned open-circuit fault of power tubes fault-tolerance approach and controls.
Existing Instantaneous torque control method is adopted when asynchronous machine power generation system normally runs, its general principle is, the torque that asynchronous machine produces is the basic concept that motor carries out energy converting between mechanical, control instantaneous torque, just control energy converting between mechanical process during electric power generation, thus whole electricity generation system can be made to obtain excellent dynamic property.Because instantaneous torque is proportional to the sine value of angle between motor stator and rotor magnetic linkage, instantaneous torque to be controlled rapidly, the angle of stator and rotor magnetic linkage should be changed as quickly as possible.Because rotor flux is by stator magnetic linkage induction generation, its change wants slow relative to stator magnetic linkage, therefore changes rapidly the angle between stator and rotor magnetic linkage, realizes indeed through quick change stator magnetic linkage.The method of Instantaneous torque control is the different on off states by selecting converter, and namely the different voltage vectors of electricity generation system, are applied directly on motor winding, make the stator magnetic linkage ψ of motor
schanged rapidly, thus controlled the instantaneous torque of motor rapidly.In control procedure, for keeping high dynamic performance, stator magnetic linkage amplitude | ψ
s| constant condition need be met, therefore magnetic linkage ψ
smovement locus be circular.
The Instantaneous torque control that asynchronous machine power generation system normally runs comprises Voltage Establishment and generating voltage-stabilized electricity by use two processes.
Voltage Establishment process comprises three phases: one is enter generating state, under initial field circuit effect, digital signal processor is by the selection to three-phase six switch converters voltage vector, it is negative for controlling motor instantaneous torque, control stator magnetic linkage amplitude to increase in time, make asynchronous machine enter generating state; Two is that low pressure accessory power supply exits the stage, and it is negative that digital signal processor continues to control motor instantaneous torque, makes VD U
dcincrease gradually, work as U
dcwhen being greater than low pressure accessory power supply voltage, due to the blocking effect of diode 5, low pressure accessory power supply exits electricity generation system naturally; Three is that voltage increases power generating stage, this stage required instantaneous torque (also known as torque set-point) T controlled
e *by the VD U measured by voltage sensor 8
dcwith VD (also known as the voltage given value) U of required control
dc *deviation through PID regulate (P represents ratio, I represents integration, D represents differential) obtain:
K in formula
p, k
i, k
dbe respectively ratio, integration and differentiation coefficient.
The instantaneous torque of DSP CONTROL motor follows torque set-point T
e *, make voltage U
dcincrease, until with the VD U of required control
dc *deviation reach the error range of regulation.
When asynchronous machine power generation system generating voltage-stabilized electricity by use runs, torque set-point T
e *computational methods are identical with the computational methods of voltage build phase in Voltage Establishment process.
During asynchronous machine power generation system fault-tolerant operation, because converter circuit topology there occurs change, it is no longer the three-phase six switch converters mode shown in Fig. 2, and become two-phase four switch converters mode, voltage vector there occurs change compared with when normally running, it is to the regulating action of stator flux of motor and torque with completely different when normally running, and therefore the selection scheme of voltage vector will redesign.In the utility model, an important feature of control method analyzes the impact for motor magnetic linkage and torque of voltage vector in fault-tolerant rear two-phase four switch converters asynchronous machine power generation system, design the optimal voltage vector option table made new advances accordingly, realize the quick control to motor magnetic linkage and instantaneous torque, continue the dynamic property keeping fault-tolerant rear system excellent.The foundation of fault-tolerant rear two-phase four switch converters asynchronous machine power generation system optimal voltage vector option table is the core of the utility model control method.
The voltage vector of fault-tolerant rear two-phase four switch converters is as shown in Fig. 4 (a), (b), (c).Fig. 4 (a) to break down and fault-tolerant for after two-phase four switch converters for one of first-phase brachium pontis 2.1 power tube, the voltage vector of asynchronous machine power generation system, that now form two-phase four switch converters is T3, T4, T5, T6, controls motor b phase and c phase winding current flowing.The corresponding states that in Fig. 4 (a), four voltage vectors and power tube turn on and off is as shown in table 1.
The corresponding states that table 1 four voltage vectors and power tube turn on and off
| Voltage vector | T3 | T4 | T5 | T6 |
| V 0(00) | Turn off | Conducting | Turn off | Conducting |
| V 1(01) | Turn off | Conducting | Conducting | Turn off |
| V 2(10) | Conducting | Turn off | Turn off | Conducting |
| V 3(11) | Conducting | Turn off | Conducting | Turn off |
Two-phase four switch converters asynchronous machine power generation system voltage vector feature is: have effective vector that four amplitudes do not wait, each vector differs 90o successively.
Fig. 4 (b) breaks down and the fault-tolerant voltage vector for system after two-phase four switch converters for power tube in second-phase brachium pontis (2.2), T1, T2, T5, T6 due to what now form two-phase four switch converters, corresponding control motor a phase and c phase winding current flowing, thus all voltage vectors are than all backward 120 ° in Fig. 4 (a).Fig. 4 (c) breaks down and the fault-tolerant voltage vector for system after two-phase four switch converters for power tube in third phase brachium pontis 2.3, and all voltage vectors are than all falling behind 120 ° in Fig. 4 (b).
From Fig. 4 (a), (b), (c), error-tolerance type converter contains four mutually perpendicular voltage vector V
0(00), V
1(01), V
2(10), V
3(11), magnetic linkage plane of movement can be divided into four sectors by the relative position according to voltage vector, breaks down and fault-tolerant for two-phase four switch converters system for first-phase brachium pontis 2.1 power tube, magnetic linkage plane of movement is divided into the θ in Fig. 5
1, θ
2, θ
3, θ
4four sectors.With θ
1sector is example analytical voltage vector to the regulating action of stator magnetic linkage and torque.
In Fig. 5, continuous circular line represents the mean place of stator flux of motor motion circular trace, and two circular dashed line represent stator magnetic linkage movement locus scope.When electric power generation runs, stator magnetic linkage vector ψ
slag behind rotor flux linkage vector ψ
ran angle δ, due to V
0(00), V
2(10) ψ is made
sto the direction motion departing from the round heart of magnetic linkage, therefore these two vectors make | ψ
s| increase, V
1(01), V
2(10) ψ is made
smove near the direction of the round heart of magnetic linkage, therefore these two vectors make | ψ
s| reduce; V
2(10), V
3(11) ψ is made
sand ψ
rangle reduce, T
eabsolute value reduces, but due to T during generating
ebe negative, therefore T
enumerical value is actual in increase; V
0(00), V
1(01) ψ is made
sand ψ
rbetween angle increase, T
eabsolute value increases, and numerical value reduces.In figure ↑ represent increase, ↓ represent reduction.This account for voltage vector is applied on motor winding, the rapid change of stator magnetic linkage and torque can be caused, variation tendency is relevant with the sector residing for stator magnetic linkage with degree, optimum voltage vector directly can be selected accordingly to be applied on motor winding, meet the direct torque requirement of system.The fault-tolerant rear two-phase four switch converters asynchronous machine power generation system Instantaneous torque control optimal voltage vector option table of the utility model design, as shown in table 2.
Table 2 two-phase four switch converters asynchronous machine power generation system Instantaneous torque control optimal voltage vector option table
| ψ | τ | θ 1 | θ 2 | θ 3 | θ 4 |
| 0 | 0 | V 2(10) | V 3(11) | V 1(01) | V 0(00) |
| 0 | 1 | V 0(00) | V 2(10) | V 3(11) | V 1(01) |
| 1 | 0 | V 3(11) | V 1(01) | V 0(00) | V 2(10) |
| 1 | 1 | V 1(01) | V 0(00) | V 2(10) | V 3(11) |
In table 2, ψ or τ is that the vector that stator magnetic linkage amplitude or torque are increased is selected in 0 expression requirement, ψ or τ is 1 and represents the vector requiring to select and stator magnetic linkage amplitude or torque are reduced.With θ in Fig. 5
1sector is example, if require that magnetic linkage and torque all increase, then optimal voltage vector is V
2(10); If require that magnetic linkage increases, torque reduces, then optimal voltage vector is V
0(00); If require that magnetic linkage reduces, torque increases, then optimal voltage vector is V
3(11); If require that magnetic linkage and torque all reduce, then optimal voltage vector is V
1(01).
If with torque set-point T during normal operation
e *computational methods, T
e *with DC power output voltage U
dcfluctuate and fluctuate, as T in Fig. 6
e *, in such two-phase four switch converters system, send out V
0(00), V
1(01), V
2and V (10)
3the chance of (11) four voltage vectors and time sample different in size, the charge and discharge chance of the first bus capacitor 3 and the second bus capacitor 4 is unequal, if in a current cycle, first bus capacitor 3 charge volume is greater than discharge capacity, second bus capacitor 4 charge volume must be less than discharge capacity, along with the accumulation of time, the first bus capacitor 3 voltage is to being greater than U
dcthe direction drift of/2, the second bus capacitor 4 voltage is to being less than U
dcthe direction drift of/2, two electric capacity operating states are uneven.For suppressing the voltage drift of bus capacitor 3,4, the fault-tolerant rear torque to two-phase four switching system is given to be revised, and the fluctuating range making torque given reduces, the torque set-point T of two-phase four switch converters system
e * 'for:
Section 1 U in above formula
dc' be voltage sensor 8 survey direct voltage U
dcdigital filtering value.T
e * 'still comprise ratio, integration and differential three, proportional is to U
dc' and required voltage U
dc *error carry out, integration and differential are still to surveyed DC power output voltage U
dcwith required DC power output voltage U
dc *deviation carry out.T
e * 'change, as shown in phantom in Figure 6.
Relative to T
e *, due to T
e * 'fluctuation be effectively suppressed, V sent out by controller
0(00), V
1(01), V
2and V (10)
3(11) chance of vector and time length substantially impartial, first bus capacitor 3 and the second bus capacitor 4 obtain basic impartial charge and discharge chance, and voltage drift is inhibited, two electric capacity operating state balances, VD is stablized, the dynamic property that the system that simultaneously ensure that is excellent.
Claims (1)
1. an error-tolerance type Instantaneous torque control asynchronous machine power generation system, is characterized in that: comprise main circuit, initial field circuit, testing circuit and control circuit;
Described main circuit comprises asynchronous machine, error-tolerance type converter, the first bus capacitor, the second bus capacitor; Error-tolerance type converter comprises first-phase brachium pontis, second-phase brachium pontis, third phase brachium pontis and a bidirectional thyristor; First-phase brachium pontis is composed in series by the first fuse, the first power tube, the second power tube and the second fuse, second-phase brachium pontis is composed in series by the 3rd fuse, the 3rd power tube, the 4th power tube and the 4th fuse, and third phase brachium pontis is composed in series by the 5th fuse, the 5th power tube, the 6th power tube and the 6th fuse; The negative pole of the first bus capacitor is connected with the positive pole of the second bus capacitor; The positive pole of three-phase brachium pontis is connected with the positive pole of the first bus capacitor, as the positive pole that DC power supply exports; The negative pole of three-phase brachium pontis is connected with the negative pole of the second bus capacitor, as the negative pole that DC power supply exports; Three-phase brachium pontis mid point connects the leading-out terminal of asynchronous machine three-phase windings respectively; Bidirectional thyristor is connected between the tie point of asynchronous machine neutral point and the first bus capacitor and the second bus capacitor;
Described initial field circuit comprises diode and low pressure accessory power supply, and the anode of diode is connected with the positive pole of low pressure accessory power supply; The negative electrode of diode connects the positive pole of DC power supply output, and the negative pole of low pressure accessory power supply connects the negative pole of DC power supply output;
Described testing circuit comprises current sensor, voltage sensor, A/D converter, current sensor is three AC Hall current sensors, and three wires being connected to asynchronous machine three-phase windings output and error-tolerance type converter three-phase brachium pontis mid point are each passed through three current sensors; Voltage sensor is a direct current Hall voltage transducer, and its input is connected in parallel on the positive and negative polar curve of DC power supply output; Current sensor is all connected with the input end of analog signal of A/D converter with the output of voltage sensor; Described control circuit comprises digital signal processor, drive circuit, the input of digital signal processor is connected with A/D converter digital signal output end, its output is connected with the input of drive circuit, and the output of drive circuit connects to the grid of the 6th power tube and the control pole of bidirectional thyristor with the first power tube of error-tolerance type converter in main circuit.
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| CN104660130A (en) * | 2015-02-07 | 2015-05-27 | 盐城工学院 | Fault-tolerant instantaneous torque controlled asynchronous motor power generation system and control method thereof |
| CN105811853A (en) * | 2016-03-23 | 2016-07-27 | 华中科技大学 | Fault-tolerant control method for power converter of embedded type variable-frequency speed control system |
| CN110247597A (en) * | 2019-06-21 | 2019-09-17 | 南京航空航天大学 | Electric excitation biconvex electrode electric machine loss of excitation failure tolerant electricity generation system and its control method |
| CN111247728A (en) * | 2017-08-30 | 2020-06-05 | 鲲腾科技公司 | Motor/generator system and fault tolerant control method |
| CN111355414A (en) * | 2018-12-21 | 2020-06-30 | 比亚迪股份有限公司 | Vehicle, motor drive device, control method, and readable storage medium |
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2015
- 2015-02-07 CN CN201520102497.8U patent/CN204392129U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104660130A (en) * | 2015-02-07 | 2015-05-27 | 盐城工学院 | Fault-tolerant instantaneous torque controlled asynchronous motor power generation system and control method thereof |
| CN105811853A (en) * | 2016-03-23 | 2016-07-27 | 华中科技大学 | Fault-tolerant control method for power converter of embedded type variable-frequency speed control system |
| CN111247728A (en) * | 2017-08-30 | 2020-06-05 | 鲲腾科技公司 | Motor/generator system and fault tolerant control method |
| CN111247728B (en) * | 2017-08-30 | 2022-08-02 | 鲲腾科技公司 | Motor/generator system and fault tolerant control method |
| CN111355414A (en) * | 2018-12-21 | 2020-06-30 | 比亚迪股份有限公司 | Vehicle, motor drive device, control method, and readable storage medium |
| CN111355414B (en) * | 2018-12-21 | 2024-05-07 | 比亚迪股份有限公司 | Vehicle, motor drive device, control method, and readable storage medium |
| CN110247597A (en) * | 2019-06-21 | 2019-09-17 | 南京航空航天大学 | Electric excitation biconvex electrode electric machine loss of excitation failure tolerant electricity generation system and its control method |
| CN110247597B (en) * | 2019-06-21 | 2021-04-13 | 南京航空航天大学 | Excitation-circuit doubly salient motor field loss fault-tolerant power generation system and control method thereof |
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