CN107508505B - A kind of brushless DC motor control system based on aerospace applications - Google Patents
A kind of brushless DC motor control system based on aerospace applications Download PDFInfo
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- CN107508505B CN107508505B CN201710864406.8A CN201710864406A CN107508505B CN 107508505 B CN107508505 B CN 107508505B CN 201710864406 A CN201710864406 A CN 201710864406A CN 107508505 B CN107508505 B CN 107508505B
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- motor
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Classifications
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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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
- H02P6/085—Arrangements for controlling the speed or torque of a single motor in a bridge configuration
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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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/0243—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being a broken phase
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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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a kind of brushless DC motor control systems based on aerospace applications.Judge the state of switching tube by measure voltage & current, and then carries out the opening of switching tube, turns off and handover operation.Failure bridge arm can be replaced with trouble-free bridge arm, the operable state of motor can be still kept in the switching tube failure on bridge arm, to improve the reliability of motor operation.
Description
Technical field
The invention belongs to a kind of electric machine controllers, and in particular to a kind of highly reliable brshless DC motor control of aerospace applications
System.
Background technique
The performance of brushless motor is strongly dependent on the performance of control driver, in the prior art seldom to brushless motor
The reliability of control driver is studied.And in the application of aviation particular surroundings, highly reliable when long is control driving
One of emphasis performance assessment criteria of device.
Summary of the invention
The purpose of the present invention is to provide a kind of highly reliable brushless DC motor control system based on aerospace applications, the control
System processed can be realized fault detection, and power topology joined certain amount compared with conventional topologies structure
MOSFET pipe and switch, and the control method managed and switched to MOSFET is proposed, lower progress switching tube of nonserviceabling is cut
It changes, the reliability of control driver is improved using trouble-free bridge arm.The present invention may be directly applied to brshless DC motor control
In device processed；Its bridge arm state inspection being related to is also directly applicable in any brushless direct current motor controller simultaneously, is had
It is widely used.
According to the present invention, a kind of brushless DC motor control system based on aerospace applications is provided, which is characterized in that packet
It includes:
Power supply, electric power needed for being configured to supply motor operation；
Capacitor C1 is connect with the power sources in parallel；
Three-phase motor, including A phase, B phase and C phase；
Switch transistor T 1-T6, wherein switch transistor T 1 is connected between the A phase of the three-phase motor and positive pole, switching tube
T4 is connected between the A phase of the three-phase motor and power cathode, and switch transistor T 3 is connected to the B phase and power supply of the three-phase motor
Between anode, switch transistor T 6 is connected between the B phase of the three-phase motor and power cathode, and switch transistor T 5 is connected to the three-phase
Between the C phase and positive pole of motor, switch transistor T 2 is connected between the C phase of the three-phase motor and power cathode；
Switch K1-K6, wherein switch K1 is connected between switch T1 and positive pole, switch K2 be connected to switch T3 with
Between positive pole, switch K3 is connected between switch T5 and positive pole, switch K4 be connected to switch T4 and power cathode it
Between, switch K5 is connected between switch T6 and power cathode, and switch K6 is connected between switch T2 and power cathode, wherein electricity
A phase, switch T1, switch T4, switch K1 and the switch K4 of machine constitute A phase bridge arm, the B phase of motor, switch T3, switch T6, switch
K2 and switch K5 constitutes A phase bridge arm, and C phase, switch T5, switch T2, switch K3 and the switch K6 of motor constitute C phase bridge arm；
MOSFET pipe T7-T12, MOSFET pipe T7 is connected in the A phase of motor, and MOSFET pipe T8 is connected to the B phase of motor
On, MOSFET pipe T9 is connected in motor C phase, and MOSFET pipe T10 is connected between the A phase of motor and B phase, MOSFET pipe T11
It is connected between the B phase of motor and C phase, MOSFET pipe T12 is connected to the A of motor between C phase；
Controller is configured as: the state of detection A phase bridge arm, B phase bridge arm, C phase bridge arm, when the normal work of switch transistor T 1-T6
When making, switch K1-K6 closure, MOSFET pipe T7, T8 and T9 closure, MOSFET pipe T10, T11 and T12 disconnection, the normal work of motor
Make；
When one or more in the switch transistor T 1 and T4 on A phase bridge arm break down, execute on A phase bridge arm
The replacement operation of switch transistor T 1 and T4, switch K1 and K4 are disconnected, and when motor is when AB phase works, MOSFET pipe T7, T8, T12 are closed
It closes, T9 is disconnected, thus with the switch transistor T 1 and T4 of the switch transistor T 2 of C phase bridge arm and T5 replacement A phase bridge arm, when motor is in AC phase work
When making, MOSFET pipe T7, T10, T9 closure, T8 are disconnected, to replace opening for A phase bridge arm with the switch transistor T 3 of B phase bridge arm and T6
Pipe T1 and T4 are closed, when BC phase works, is not related to failure bridge arm, the working condition and switch transistor T 1-T6 of switch and MOSFET pipe
It is consistent when normal work；
When one or more in the switch transistor T 3 and T6 on B phase bridge arm break down, execute on B phase bridge arm
The replacement operation of switch transistor T 3 and T6, switch K2 and K5 are disconnected, and when motor is when AB phase works, MOSFET pipe T7, T8, T11 are closed
Close, T9 disconnect, thus on C phase bridge arm switch transistor T 2 and T5 replacement B phase bridge arm on switch transistor T 3 and T6, when motor
When BC phase works, MOSFET pipe T8, T10, T9 closure, T7 are disconnected, thus with switch transistor T 1 and T4 replacement B phase on A phase bridge arm
Switch transistor T 3 and T6 on bridge arm are not related to failure bridge arm, the work shape of switch and MOSFET pipe when motor is when AC phase works
State is consistent when working normally with switch transistor T 1-T6；
When one or more in the switch transistor T 2 and T5 on C phase bridge arm break down, execute on C phase bridge arm
The replacement operation of switch transistor T 2 and T5, switch K3 and K6 are disconnected, and when motor is when AC phase works, MOSFET pipe T7, T9, T11 are closed
It closes, T8 is disconnected, thus with switch transistor T 5 and T2 in the switch transistor T 3 and T6 replacement C phase bridge arm on B phase bridge arm, when motor is in BC
When mutually working, MOSFET pipe T8, T9, T12 closure, T7 are disconnected, thus with switch transistor T 1 and T4 replacement C phase bridge on A phase bridge arm
Switch transistor T 2 and T5 on arm, when motor is when AB phase works, the working condition and switch transistor T 1-T6 of switch and MOSFET pipe are just
It is often consistent when work.
According to one embodiment of present invention, the state packet of the controller detection A phase bridge arm, B phase bridge arm, C phase bridge arm
It includes:
It acquires the line voltage of motor and carries out phase voltage conversion, then carry out phase voltage state judgement；
It acquires the phase current of motor and carries out the amperometry of bridge arm；
Detection switch pipe T1-T6 output end voltage and the state-detection for carrying out switch transistor T 1-T6, then carry out switching tube state
The judgement of T1-T6；
Wherein, the result of the amperometry of the processor judges according to phase voltage state result and bridge arm judges motor
The phase of operation.
According to one embodiment of present invention, it if A phase bridge arm, B phase bridge arm, the state of C phase bridge arm are all normal, opens
It closes pipe T1-T6 to work normally, switch K1-K6 closure, MOSFET pipe T7, T8 and T9 closure, MOSFET pipe T10, T11 and T12 are disconnected
It opens, motor works normally；If in A phase bridge arm, B phase bridge arm, C phase bridge arm, there are the switching tubes on a phase bridge arm to break down,
Then the controller executes the replacement operation to the switching tube on the phase bridge arm；If in A phase bridge arm, B phase bridge arm, C phase bridge arm
There are the switching tubes on the bridge arm of two-phase or more to break down, then the brshless DC motor control based on aerospace applications
System is closed power supply progress failure and is checked oneself.
The beneficial technical effect of the present invention lies in:
1. failover is convenient, control mode is flexible, high reliablity.
2. comparing previous three phase full bridge topological structure, the present invention is filled by the MOSFET and switch of increase certain amount
Divide and controlled using not used bridge arm, improves the utilization rate of former DC brushless controller bridge arm.
3. comparing the DC brushless controller of redundancy, the failure that the present invention can be compatible with is more, only replacement bridge arm, and superfluous
Remaining DC brushless controller is then that entire three phase full bridge is replaced, and in comparison, the present invention can be effectively saved switch
Pipe cost also improves the reliability of system.
4. judging the working condition of every phase bridge arm, method by the end voltage and switching tube output end voltage of monitoring motor
It is simple and reliable, it does not need to increase extra hardware circuit.
Detailed description of the invention
Fig. 1 is the schematic diagram of the three-phase motor system of the prior art.
Fig. 2 is the schematic diagram of the electric machine control system of embodiment according to the present invention.
Fig. 3 is the motor control logic figure of embodiment according to the present invention.
Specific embodiment
Below in conjunction with attached drawing, the embodiment of the present invention is made further detailed description:
Fig. 1 is the schematic diagram for having the three-phase motor of technology.As shown in Figure 1, the three-phase motor system includes power supply, it is configured
For electric power needed for providing motor operation；Capacitor C1 is connect with the power sources in parallel；Three-phase motor, including A phase, B phase and C
Phase；Switch transistor T 1-T6, wherein switch transistor T 1 is connected between the A phase of the three-phase motor and positive pole, and switch transistor T 4 connects
It connects between the A phase and power cathode of the three-phase motor, switch transistor T 3 is connected to the B phase and positive pole of the three-phase motor
Between, switch transistor T 6 is connected between the B phase of the three-phase motor and power cathode, and switch transistor T 5 is connected to the three-phase motor
C phase and positive pole between, switch transistor T 2 is connected between the C phase of the three-phase motor and power cathode.Wherein, motor
A phase, switch transistor T 1, switch transistor T 4 constitute A phase bridge arm, and B phase, switch transistor T 3, the switch transistor T 6 of motor constitute B phase bridge arm, motor
C phase, switch transistor T 5, switch transistor T 2 constitute C phase bridge arm.Switching tube on any phase bridge arm in A phase, B phase or C phase bridge arm
When failure, the phase bridge arm failure will lead to, so that motor is unable to run.
Fig. 2 is the schematic diagram of the electric machine control system of embodiment according to the present invention.The electric machine control system includes power supply,
Electric power needed for being configured to supply motor operation；Capacitor C1 is connect with the power sources in parallel；Three-phase motor, including A phase, B
Phase and C phase；Switch transistor T 1-T6, wherein switch transistor T 1 is connected between the A phase of the three-phase motor and positive pole, switching tube
T4 is connected between the A phase of the three-phase motor and power cathode, and switch transistor T 3 is connected to the B phase and power supply of the three-phase motor
Between anode, switch transistor T 6 is connected between the B phase of the three-phase motor and power cathode, and switch transistor T 5 is connected to the three-phase
Between the C phase and positive pole of motor, switch transistor T 2 is connected between the C phase of the three-phase motor and power cathode；Switch K1-
K6, wherein switch K1 is connected between switch T1 and positive pole, and switch K2 is connected between switch T3 and positive pole, is opened
It closes K3 to be connected between switch T5 and positive pole, switch K4 is connected between switch T4 and power cathode, and switch K5 is connected to
Between switch T6 and power cathode, switch K6 is connected between switch T2 and power cathode, wherein the A phase of motor, switching tube
T1, switch transistor T 4, switch K1 and switch K4 constitute A phase bridge arm, the B phase of motor, switch transistor T 3, switch transistor T 6, switch K2 and open
It closes K5 and constitutes B phase bridge arm, C phase, switch transistor T 5, switch transistor T 2, switch K3 and the switch K6 of motor constitute C phase bridge arm；MOSFET
Pipe T7-T12, MOSFET pipe T7 is connected in the A phase of motor, and MOSFET pipe T8 is connected in the B phase of motor, and MOSFET pipe T9 connects
It connects in motor C phase, MOSFET pipe T10 is connected between the A phase of motor and B phase, and MOSFET pipe T11 is connected to the B phase of motor
Between C phase, MOSFET pipe T12 is connected to the A of motor between C phase.
The electric machine control system further includes controller, is configured as: detecting the shape of A phase bridge arm, B phase bridge arm, C phase bridge arm
State, when switch transistor T 1-T6 is worked normally, switch K1-K6 closure, MOSFET pipe T7, T8 and T9 closure, MOSFET pipe T10,
T11 and T12 is disconnected, and motor works normally.When one or more in the switch transistor T 1 and T4 on A phase bridge arm break down
When, it executes to the replacement operation of switch transistor T 1 and T4 on A phase bridge arm, switch K1 and K4 disconnection, when motor is when AB phase works,
MOSFET pipe T7, T8, T12 closure, T9 are disconnected, thus with the switch transistor T 1 of the switch transistor T 2 of C phase bridge arm and T5 replacement A phase bridge arm
And T4, when motor is when AC phase works, MOSFET pipe T7, T10, T9 closure, T8 is disconnected, thus with the switch transistor T 3 of B phase bridge arm
Failure bridge arm, the work of switch and MOSFET pipe it are not related to when BC phase works with the switch transistor T 1 and T4 of T6 replacement A phase bridge arm
Make consistent when state is worked normally with switch transistor T 1-T6.One or more hairs in the switch transistor T 3 and T6 on B phase bridge arm
When raw failure, the replacement operation to switch transistor T 3 and T6 on B phase bridge arm is executed, switch K2 and K5 are disconnected, when motor is in AB phase
When work, MOSFET pipe T7, T8, T11 closure, T9 are disconnected, thus with switch transistor T 2 and T5 replacement B phase bridge arm on C phase bridge arm
On switch transistor T 3 and T6, when motor is when BC phase works, MOSFET pipe T8, T10, T9 closure, T7 is disconnected, thus with A phase
Switch transistor T 1 on bridge arm and switch transistor T 3 and T6 on T4 replacement B phase bridge arm are not related to failure when motor is when AC phase works
The working condition of bridge arm, switch and MOSFET pipe is consistent when working normally with switch transistor T 1-T6.Switching tube on C phase bridge arm
When one or more in T2 and T5 break down, the replacement operation to switch transistor T 2 and T5 on C phase bridge arm, switch are executed
K3 and K6 is disconnected, and when motor is when AC phase works, MOSFET pipe T7, T9, T11 closure, T8 is disconnected, thus on B phase bridge arm
Switch transistor T 3 and switch transistor T 5 and T2 on T6 replacement C phase bridge arm, when motor is when BC phase works, MOSFET pipe T8, T9, T12
Closure, T7 are disconnected, thus with switch transistor T 2 and T5 in the switch transistor T 1 and T4 replacement C phase bridge arm on A phase bridge arm, when motor exists
When AB phase works, the working condition of switch and MOSFET pipe is consistent when working normally with switch transistor T 1-T6.
Further, controller detection A phase bridge arm, B phase bridge arm, C phase bridge arm state include: the line for acquiring motor
Voltage simultaneously carries out phase voltage conversion, then carries out phase voltage state judgement；It acquires the phase current of motor and carries out the electric current point of bridge arm
Analysis；Detection switch pipe T1-T6 output end voltage and the state-detection for carrying out switch transistor T 1-T6, then carry out switching tube state T1-T6
Judgement.Wherein, the result of the amperometry of the processor judges according to phase voltage state result and bridge arm judges motor
The phase of operation.
As shown in figure 3, the line voltage of controller acquisition motor, and convert to obtain phase voltage, later to line voltage
State judgement is carried out to phase voltage.In the present invention, the size of the line voltage of the motor of star-like connection is phase voltage size
Times, if the phase voltage that conversion obtains is abnormal (that is, not equal to line voltage), then show faulty.
Meanwhile controller acquires phase current, and carries out the amperometry of bridge arm, in an embodiment of the present invention, can will adopt
The secure threshold of the phase current and setting that collect is compared, if phase current not within the scope of secure threshold, shows the phase
Bridge arm is faulty, and in this example, the secure threshold range of phase current is (- 100A ,+100A).Processor can be according to phase voltage shape
The result of the amperometry of the result and bridge arm of state judgement judges the phase of motor operation.
In addition, controller also carries out the detection of switching tube output end voltage, and pass through hardware comparison circuit detection switch pipe
State, to judge the state of switching tube.
According to above-mentioned judgement and analysis, controller can determine the phase (i.e. bridge arm state) and switching tube of motor operation
State, and aforesaid operations are executed according to the phase of motor operation and the state of switching tube.Specifically, when A phase bridge arm, B phase bridge arm,
The state of C phase bridge arm is all normal, then switch transistor T 1-T6 is worked normally, and switch K1-K6 closure, MOSFET pipe T7, T8 and T9 are closed
It closes, MOSFET pipe T10, T11 and T12 are disconnected, and motor works normally；If in A phase bridge arm, B phase bridge arm, C phase bridge arm, there are one
Switching tube on phase bridge arm breaks down, then the controller executes the replacement operation to the switching tube on the phase bridge arm；If A
Phase bridge arm, B phase bridge arm, there are the switching tubes on the bridge arm of two-phase or more to break down in C phase bridge arm, then described based on boat
The brushless DC motor control system of sky application is closed power supply progress failure and is checked oneself.
Brushless DC motor control system proposed by the present invention based on aerospace applications realizes highly reliable brushless dc
Machine control function is judged the state of switching tube by measure voltage & current, and then carries out opening, turn off and switching for switching tube
Operation.It may be directly applied in brushless direct current motor controller；Its bridge arm state inspection being related to can also be answered directly simultaneously
For having a wide range of applications in any brushless direct current motor controller.
Unspecified part of the present invention belongs to common sense well known to those skilled in the art.
Claims (7)
1. a kind of brushless DC motor control system based on aerospace applications characterized by comprising
Power supply, electric power needed for being configured to supply motor operation；
Capacitor C1 is connect with the power sources in parallel；
Three-phase motor, including A phase, B phase and C phase；
Switch transistor T 1-T6, wherein switch transistor T 1 is connected between the A phase of the three-phase motor and positive pole, and switch transistor T 4 connects
It connects between the A phase and power cathode of the three-phase motor, switch transistor T 3 is connected to the B phase and positive pole of the three-phase motor
Between, switch transistor T 6 is connected between the B phase of the three-phase motor and power cathode, and switch transistor T 5 is connected to the three-phase motor
C phase and positive pole between, switch transistor T 2 is connected between the C phase of the three-phase motor and power cathode；
Switch K1-K6, wherein switch K1 is connected between switch T1 and positive pole, and switch K2 is connected to switch T3 and power supply
Between anode, switch K3 is connected between switch T5 and positive pole, and switch K4 is connected between switch T4 and power cathode, is opened
It closes K5 to be connected between switch T6 and power cathode, switch K6 is connected between switch T2 and power cathode, wherein the A of motor
Phase, switch transistor T 1, switch transistor T 4, switch K1 and switch K4 constitute A phase bridge arm, the B phase of motor, switch transistor T 3, switch transistor T 6,
Switch K2 and switch K5 constitutes B phase bridge arm, and C phase, switch transistor T 5, switch transistor T 2, switch K3 and the switch K6 of motor constitute C phase bridge
Arm；
MOSFET pipe T7-T12, MOSFET pipe T7 is connected in the A phase of motor, and MOSFET pipe T8 is connected in the B phase of motor,
MOSFET pipe T9 is connected in motor C phase, and MOSFET pipe T10 is connected between the A phase of motor and B phase, the T11 connection of MOSFET pipe
Between the B phase and C phase of motor, MOSFET pipe T12 is connected to the A of motor between C phase.
2. the brushless DC motor control system according to claim 1 based on aerospace applications, which is characterized in that the base
In the brushless DC motor control system of aerospace applications further include: controller is configured as detection A phase bridge arm, B phase bridge arm, C phase
The state of bridge arm, when switch transistor T 1-T6 is worked normally, switch K1-K6 closure, MOSFET pipe T7, T8 and T9 closure, MOSFET
Pipe T10, T11 and T12 are disconnected, and motor works normally.
3. the brushless DC motor control system according to claim 2 based on aerospace applications, which is characterized in that the control
Device processed is also configured to execute when one or more in the switch transistor T 1 and T4 on A phase bridge arm break down to A phase
The replacement operation of switch transistor T 1 and T4 on bridge arm, switch K1 and K4 are disconnected, when motor is when AB phase works, MOSFET pipe T7,
T8, T12 closure, T9 are disconnected, to work as motor with the switch transistor T 1 and T4 of the switch transistor T 2 of C phase bridge arm and T5 replacement A phase bridge arm
When AC phase works, MOSFET pipe T7, T10, T9 closure, T8 are disconnected, to replace A phase with the switch transistor T 3 of B phase bridge arm and T6
The switch transistor T 1 and T4 of bridge arm are not related to failure bridge arm, the working condition and switch of switch and MOSFET pipe when BC phase works
Pipe T1-T6 is consistent when working normally.
4. the brushless DC motor control system according to claim 2 based on aerospace applications, which is characterized in that the control
Device processed is also configured to execute when one or more in the switch transistor T 3 and T6 on B phase bridge arm break down to B phase
The replacement operation of switch transistor T 3 and T6 on bridge arm, switch K2 and K5 are disconnected, when motor is when AB phase works, MOSFET pipe T7,
T8, T11 closure, T9 are disconnected, thus with switch transistor T 3 and T6 in the switch transistor T 2 and T5 replacement B phase bridge arm on C phase bridge arm, when
Motor is when BC phase works, and MOSFET pipe T8, T10, T9 closure, T7 is disconnected, thus with switch transistor T 1 and T4 on A phase bridge arm
The switch transistor T 3 and T6 on B phase bridge arm are replaced, when motor is when AC phase works, is not related to failure bridge arm, switch and MOSFET pipe
Working condition and switch transistor T 1-T6 it is consistent when working normally.
5. the brushless DC motor control system according to claim 2 based on aerospace applications, which is characterized in that the control
Device processed is also configured to execute when one or more in the switch transistor T 2 and T5 on C phase bridge arm break down to C phase
The replacement operation of switch transistor T 2 and T5 on bridge arm, switch K3 and K6 are disconnected, when motor is when AC phase works, MOSFET pipe T7,
T9, T11 closure, T8 are disconnected, thus with switch transistor T 5 and T2 in the switch transistor T 3 and T6 replacement C phase bridge arm on B phase bridge arm, when
Motor when BC phase works, MOSFET pipe T8, T9, T12 closure, T7 disconnect, thus on A phase bridge arm switch transistor T 1 and T4 replace
The switch transistor T 2 and T5 on C phase bridge arm are changed, when motor is when AB phase works, the working condition and switching tube of switch and MOSFET pipe
T1-T6 is consistent when working normally.
6. the brushless DC motor control system according to claim 1 based on aerospace applications, which is characterized in that the control
Device processed detection A phase bridge arm, B phase bridge arm, C phase bridge arm state include:
It acquires the line voltage of motor and carries out phase voltage conversion, then carry out phase voltage state judgement；
It acquires the phase current of motor and carries out the amperometry of bridge arm；
Detection switch pipe T1-T6 output end voltage and the state-detection for carrying out switch transistor T 1-T6, then carry out switch transistor T 1-T6 shape
The judgement of state；
Wherein, the result of the amperometry of the controller judges according to phase voltage state result and bridge arm judges motor operation
Phase.
7. the brushless DC motor control system according to claim 6 based on aerospace applications, which is characterized in that if A
Phase bridge arm, B phase bridge arm, the state of C phase bridge arm are all normal, then switch transistor T 1-T6 is worked normally, switch K1-K6 closure,
MOSFET pipe T7, T8 and T9 closure, MOSFET pipe T10, T11 and T12 are disconnected, and motor works normally；If A phase bridge arm, B phase bridge
There are the switching tubes on a phase bridge arm to break down in arm, C phase bridge arm, then the controller is executed to the switch on the phase bridge arm
The replacement operation of pipe；If there are the switching tube hairs on the bridge arm of two-phase or more in A phase bridge arm, B phase bridge arm, C phase bridge arm
Raw failure, then the brushless DC motor control system based on aerospace applications is closed power supply progress failure and is checked oneself.
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| CN106787977A (en) * | 2016-12-22 | 2017-05-31 | 中国矿业大学 | A kind of synchronous electric motor rotor field circuit with fault-tolerant operation |
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