CN108270203A - A kind of high-voltage high-power motor driving protection system and method - Google Patents
A kind of high-voltage high-power motor driving protection system and method Download PDFInfo
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- CN108270203A CN108270203A CN201711339859.5A CN201711339859A CN108270203A CN 108270203 A CN108270203 A CN 108270203A CN 201711339859 A CN201711339859 A CN 201711339859A CN 108270203 A CN108270203 A CN 108270203A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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Abstract
The invention discloses a kind of high-voltage high-power motors to drive protection system and method.Wherein, which includes high-power power supply, high-voltage motor drive module, driving software and hardware protection circuit, three-phase current detection circuit, power supply hardware protection circuit；Wherein, when the instantaneous stall of motor and the instantaneous heavy load disturbances of motor; the different protection signal of current signal generation that driving software and hardware protection circuit acquire according to the current signal of three-phase current detection circuit, motor speed and high voltage bus current sampling circuit is sent to high-voltage motor drive module, and high-voltage motor drive module is by the power output for turning off itself to protect itself and high-voltage motor.The present invention, using different Preservation tactics, can judge high-voltage high-power motor driver and high-voltage high-power motor malfunction, while ensure its safety and reliability to different malfunctions.
Description
Technical Field
The invention belongs to the general technical field of spaceflight, and particularly relates to a high-voltage high-power motor driving protection system and method.
Background
With the development of aerospace technology, the demand of satellite-borne mechanism products is continuously increased, the demand of transmission equipment for the satellite-borne mechanism products is continuously increased, the power of a motor for bearing electric transmission is continuously increased, the volume of the motor is continuously increased, the winding current of the motor is properly reduced for reducing the volume and weight of the motor, the winding phase voltage of the motor is inevitably increased for keeping the power unchanged, the winding voltage of the motor is increased to 80-100V, for a motor driver, the reliability and the safety of the high-voltage motor driver need to be improved by a reliable protection strategy, and the protection strategy can be suitable for different high-voltage and high-power motor drivers. The reliability and the safety of the high-voltage high-power motor are ensured, and the reliability and the safety of the high-voltage high-power motor can be improved.
The protection strategy of the high-voltage high-power motor driver needs to be judged according to the working mode of the high-voltage motor driver in the driving motor, and then a corresponding protection mode is adopted. When the high-voltage motor driver drives the motor to work, phenomena of overhigh temperature of the high-voltage motor, overhigh winding current of the high-voltage motor, overhigh high-voltage bus current of the high-voltage high-power motor driver, overhigh high-voltage bus voltage of the high-voltage high-power motor driver, overhigh input bus power of the high-voltage high-power motor driver and the like can occur, and the high-voltage high-power motor driver and the high-voltage motor can be damaged, so that the high-voltage high-power motor driver and the high-voltage motor can not work. When the phenomenon disappears, the high-voltage high-power motor driver and the high-voltage motor still need to be ensured to work normally, so that the high-voltage high-power motor driver and the high-voltage motor need to be protected by adopting a corresponding protection strategy. The prior art does not relate to a high-voltage high-power motor drive protection strategy.
Disclosure of Invention
The technical problem solved by the invention is as follows: the driving protection system and the driving protection method for the high-voltage high-power motor overcome the defects of the prior art, adopt different protection strategies for different fault states, can judge the fault states of a high-voltage high-power motor driver and the high-voltage high-power motor, and simultaneously ensure the safety and the reliability of the high-voltage high-power motor driver and the high-voltage high-power motor.
The purpose of the invention is realized by the following technical scheme: according to an aspect of the present invention, there is provided a high voltage high power motor drive protection system, comprising: the high-voltage motor protection circuit comprises a high-voltage motor driving module, a driving hardware protection circuit and a three-phase current detection circuit; when the high-voltage motor is in instantaneous locked rotor of the high-voltage high-power motor and in instantaneous heavy load disturbance of the high-voltage high-power motor, the three-phase current detection circuit acquires a three-phase current signal and transmits the three-phase current signal to the driving hardware protection circuit, the driving hardware protection circuit generates a protection signal according to the comparison between the three-phase current signal value and a set instantaneous current value and transmits the protection signal to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving module to; after the high-voltage motor is instantaneously locked and rotated and the instantaneous large-load disturbance of the high-voltage high-power motor disappears, the driving hardware protection circuit generates a protection releasing signal according to the comparison between the three-phase current signal value and the set instantaneous current value and sends the protection releasing signal to the high-voltage motor driving module, the high-voltage motor driving module restores the power output, and the high-voltage motor restores the work.
Among the above-mentioned high-voltage high-power motor drive protection system, still include: a software protection circuit; the three-phase current detection circuit acquires a three-phase current signal and transmits the three-phase current signal to the software protection circuit, the software protection circuit judges that the time of the three-phase current signal exceeding a set instantaneous current value exceeds a set time value, a protection signal generated by the software protection circuit is transmitted to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving module to stop the high-voltage motor; the software protection circuit compares the rotating speed of the high-voltage motor with a first set rotating speed value, if the rotating speed value of the motor is lower than the first set rotating speed value and continuously exceeds a set time value, a protection signal generated by the software protection circuit is sent to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving module, so that the high-voltage motor stops working; if the motor rotating speed value is higher than the first set rotating speed value and lower than the second set rotating speed value and the three-phase current signals exceed the set average current value, the protection signals generated by the software protection circuit are sent to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving module, so that the high-voltage motor stops working.
Among the above-mentioned high-voltage high-power motor drive protection system, still include: the high-voltage bus and the high-voltage bus current sampling circuit; the high-voltage bus current sampling circuit collects a peak current signal of the high-voltage bus and sends the peak current signal to the software protection circuit, the software protection circuit compares the peak current signal with a second set average current value to generate a protection signal and sends the protection signal to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving module, so that the high-voltage motor stops working.
In the high-voltage high-power motor driving protection system, a temperature signal of the high-voltage motor is sent to the software protection circuit, the software protection circuit compares the temperature signal with a set temperature value to generate a protection signal and sends the protection signal to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving module, so that the high-voltage motor stops working. The software protection circuit compares the rotating speed of the high-voltage motor with a first set rotating speed value, if the rotating speed value of the motor is lower than the first set rotating speed value and continuously exceeds a set time value, a protection signal generated by the software protection circuit is sent to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving module, so that the high-voltage motor stops working; if the motor rotating speed value is higher than the first set rotating speed value and lower than the second set rotating speed value and the three-phase current signals exceed the set average current value, the protection signals generated by the software protection circuit are sent to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving module, so that the high-voltage motor stops working.
Among the above-mentioned high-voltage high-power motor drive protection system, still include: a high-voltage high-power supply and a power supply hardware protection circuit; the high-voltage bus current transformer of the high-voltage high-power supply detects a current value signal of a high-voltage bus and sends the current value signal to the power supply hardware protection circuit, the power supply hardware protection circuit compares the current value signal with a set power supply output average current value to generate a protection signal and sends the protection signal to the high-voltage high-power supply, the high-voltage high-power supply shuts off the power output of the high-voltage bus, and the voltage value of the high-voltage bus is reduced to zero, so that the high-voltage motor driving module; after the power supply hardware protection circuit compares the output average current value of the power supply with the set power supply to generate a protection signal to disappear, the high-voltage high-power supply and the high-voltage motor driving module recover power output, and the high-voltage motor recovers to work.
Among the above-mentioned high-voltage high-power motor drive protection system, still include: the system comprises an input bus and an input bus current sampling circuit; the high-voltage high-power supply is in short circuit or continuously works under a heavy load, the input bus current sampling circuit detects the current value signal of the input bus and sends the current value signal to the power supply hardware protection circuit, the power supply hardware protection circuit compares the current value signal with the set average current value of the input bus to generate a protection signal and sends the protection signal to the high-voltage high-power supply, the high-voltage high-power supply shuts off the power output of the high-voltage high-power supply, and the voltage value of the high-voltage bus is reduced to zero, so that the high-voltage motor driving module.
In the above high-voltage high-power motor drive protection system, the set instantaneous current value is 28A.
In the high-voltage high-power motor driving protection system, the set time value is 2 seconds.
In the above high-voltage high-power motor drive protection system, the first set average current value is 5A.
In the high-voltage high-power motor drive protection system, the set temperature value is 180 ℃.
In the above high-voltage high-power motor drive protection system, the second set average current value is 7A.
In the above high-voltage high-power motor drive protection system, the first set rotation speed value is 500 rpm.
In the above high-voltage high-power motor drive protection system, the second set rotation speed value is 4500 rpm.
According to another aspect of the present invention, there is also provided a high-voltage high-power motor drive protection method, including the steps of:
when the high-voltage motor is in instantaneous locked rotor of the high-voltage high-power motor and in instantaneous heavy load disturbance of the high-voltage high-power motor, the three-phase current detection circuit acquires a three-phase current signal and transmits the three-phase current signal to the driving hardware protection circuit, the driving hardware protection circuit generates a protection signal according to the comparison between the three-phase current signal value and a set instantaneous current value and transmits the protection signal to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving;
after the high-voltage motor is instantaneously locked and rotated and the instantaneous large-load disturbance of the high-voltage high-power motor disappears, the high-voltage motor drives a hardware protection circuit to generate a protection releasing signal according to the comparison between the three-phase current signal value and a set instantaneous current value and send the protection releasing signal to a high-voltage motor driving module, the high-voltage motor driving module outputs recovered power, and the high-voltage motor recovers work;
the three-phase current detection circuit acquires a three-phase current signal and transmits the three-phase current signal to the software protection circuit, the software protection circuit judges that the time of the three-phase current signal exceeding a set instantaneous current value exceeds a set time value, a protection signal generated by the software protection circuit is transmitted to the high-voltage motor driving module, and the high-voltage motor driving module switches off the power output of the high-voltage motor driving module to stop the high-voltage motor; the software protection circuit compares the rotating speed of the high-voltage motor with a first set rotating speed value, if the rotating speed value of the motor is lower than the first set rotating speed value and continuously exceeds a set time value, a protection signal generated by the software protection circuit is sent to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving module, so that the high-voltage motor stops working; if the motor rotating speed value is higher than the first set rotating speed value and lower than the second set rotating speed value and the three-phase current signal exceeds the set average current value, the protection signal generated by the software protection circuit is sent to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving module, so that the high-voltage motor stops working;
the high-voltage bus current sampling circuit acquires a peak current signal of a high-voltage bus and transmits the peak current signal to the software protection circuit, the software protection circuit compares the peak current signal with a second set average current value to generate a protection signal and transmits the protection signal to the high-voltage motor driving module, and the high-voltage motor driving module turns off the power output of the high-voltage motor driving module to stop the high-voltage motor;
the temperature signal of the high-voltage motor is sent to the software protection circuit, the software protection circuit compares the temperature signal with a set temperature value to generate a protection signal and sends the protection signal to the high-voltage motor driving module, and the high-voltage motor driving module shuts off the power output of the high-voltage motor driving module, so that the high-voltage motor stops working;
a high-voltage bus current transformer of the high-voltage high-power supply detects a current value signal of a high-voltage bus and sends the current value signal to a power supply hardware protection circuit, the power supply hardware protection circuit compares the current value signal with a set power supply output average current value to generate a protection signal and sends the protection signal to the high-voltage high-power supply, the high-voltage high-power supply shuts off the power output of the high-voltage bus, and the voltage value of the high-voltage bus is reduced to zero, so that a high-voltage;
after the power supply hardware protection circuit compares the output average current value of the power supply with a set power supply to generate a protection signal to disappear, the high-voltage high-power supply and the high-voltage motor driving module recover power output, and the high-voltage motor recovers to work;
the high-voltage high-power supply is in short circuit or continuously works under a heavy load, the input bus current sampling circuit detects the current value signal of the input bus and sends the current value signal to the power supply hardware protection circuit, the power supply hardware protection circuit compares the current value signal with the set average current value of the input bus to generate a protection signal and sends the protection signal to the high-voltage high-power supply, the high-voltage high-power supply shuts off the power output of the high-voltage high-power supply, and the voltage value of the high-voltage bus is reduced to zero, so that the high-voltage motor.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts different protection strategies for different fault states, can judge the fault states of the high-voltage high-power motor driver and the high-voltage high-power motor, and simultaneously ensures the safety and the reliability of the motor driver and the high-voltage high-power motor.
(2) The invention can set different priorities by adopting protection strategies that different modules are over against different fault states, takes instantaneous and recoverable faults as low priority and takes long-time and unrecoverable faults as high priority, and can ensure that the driver of the high-voltage high-power motor and the high-voltage high-power motor can timely recover normal operation after the instantaneous and recoverable faults disappear.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a block diagram of a high-voltage high-power motor drive protection system according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a block diagram of a high-voltage high-power motor drive protection system according to an embodiment of the present invention. As shown in fig. 1, the high-voltage high-power motor driving protection system includes an input bus 1, a high-voltage high-power supply 2, a power supply hardware protection circuit 3, an input bus current sampling circuit 4, a high-voltage bus 5, a high-voltage motor driving module 6, a driving hardware protection circuit 7, a software protection circuit 8, a three-phase current detection circuit 9, and a high-voltage bus current sampling circuit 11. Wherein,
when the high-voltage motor 10 is in instantaneous locked rotor of the high-voltage high-power motor and in instantaneous heavy load disturbance of the high-voltage high-power motor, a three-phase current signal is acquired by the three-phase current detection circuit 9 and is sent to the driving hardware protection circuit 7, the driving hardware protection circuit 7 generates a protection signal according to the comparison between the three-phase current signal value and a set instantaneous current value (the value of the set instantaneous current value is 28A), and the protection signal is sent to the high-voltage motor driving module 6, the high-voltage motor driving module 6 turns off the power output of the high-voltage motor driving module, so that the high-voltage motor 10 stops working, and.
After the high-voltage motor 10 is instantaneously locked and the high-voltage high-power motor is instantaneously subjected to large load disturbance and disappears, the driving hardware protection circuit 7 generates a protection removing signal according to the comparison between the three-phase current signal value and a set instantaneous current value (the value of the set instantaneous current value is 28A), the protection removing signal is sent to the high-voltage motor driving module 6, the high-voltage motor driving module 6 recovers power output, and the high-voltage motor 10 recovers work.
The three-phase current detection circuit 9 acquires a three-phase current signal and sends the three-phase current signal to the software protection circuit 8, the software protection circuit 8 judges that the time of the three-phase current signal exceeding a set instantaneous current value (the value of the set instantaneous current value is 28A) exceeds a set time value (the value of the set time value is 2 seconds), the protection signal generated by the software protection circuit 8 is sent to the high-voltage motor driving module 6, the high-voltage motor driving module 6 turns off the power output of the high-voltage motor driving module, and the high-voltage motor 10 stops working. The software protection circuit 8 compares the rotating speed of the high-voltage motor with a first set rotating speed value (the value of the first set rotating speed value is 500rpm), if the rotating speed value of the motor is lower than the first set rotating speed value (the value of the first set rotating speed value is 500rpm) and continuously exceeds a set time value (the value of the set time value is 2 seconds), a protection signal generated by the software protection circuit 8 is sent to the high-voltage motor driving module 6, and the high-voltage motor driving module 6 turns off the power output of the software protection circuit, so that the high-voltage motor 10 stops working; if the motor rotating speed value is higher than the first set rotating speed value (the value of the first set rotating speed value is 500rpm) and lower than the second set rotating speed value (the value of the second set rotating speed value is 4500rpm) and the three-phase current signal exceeds the first set average current value (the value of the set average current value is 1 is 5A), the protection signal generated by the software protection circuit 8 is sent to the high-voltage motor driving module 6, the high-voltage motor driving module 6 turns off the power output of the high-voltage motor driving module 6, and the high-voltage motor 10 stops working;
the high-voltage motor 10 is stopped rotating instantly when the high-voltage high-power motor is in a locked state, and the instant large-load disturbance of the high-voltage high-power motor disappears. The high voltage motor drive module 6 will not resume power output and the high voltage motor 10 will still stop working. The high-voltage motor driving module 6 and the high-voltage motor 10 are not operated again until the startup signal is received.
The high-voltage bus current sampling circuit 11 acquires a peak current signal of a high-voltage bus 5 and sends the peak current signal to the software protection circuit 8, the software protection circuit 8 compares the peak current signal of the high-voltage bus 5 with a second set average current value (the value 2 of the set average current value is 7A) to generate a protection signal and sends the protection signal to the high-voltage motor driving module 6, and the high-voltage motor driving module 6 turns off the power output of the high-voltage motor driving module 6 to stop the high-voltage motor 10, so that the high-voltage motor driving module 6 and the high-voltage motor 10 are protected.
After the software protection circuit 8 compares the peak current signal of the high-voltage bus 5 with the set average current value 2 (the value 2 of the set average current value is 7A) to generate a protection signal, the high-voltage motor driving module 6 does not recover power output, and the high-voltage motor 10 still stops working.
The temperature signal of the high-voltage motor 10 is sent to the software protection circuit 8, the software protection circuit 8 compares the temperature signal of the high-voltage motor 10 with a set temperature value (the set temperature value can be selected to be 180 ℃) to generate a protection signal and sends the protection signal to the high-voltage motor driving module 6, and the high-voltage motor driving module 6 turns off the power output of the high-voltage motor driving module to stop the high-voltage motor 10, so that the high-voltage motor 10 is protected.
After the software protection circuit 8 compares the temperature signal of the high-voltage motor 10 with a set temperature value (the set temperature value can be selected as 180 ℃), the high-voltage motor driving module 6 does not recover power output, and the high-voltage motor 10 still stops working.
The high-voltage bus current transformer 12 of the high-voltage high-power supply 2 detects a current value signal of the high-voltage bus 5 and sends the current value signal to the power supply hardware protection circuit 3, the power supply hardware protection circuit 3 compares the current value signal of the high-voltage bus 5 with a set power output average current value (the set power output average current value can be selected to be 11.3A), a protection signal is generated and sent to the high-voltage high-power supply 2, the high-voltage high-power supply 2 shuts off the power output of the high-voltage high-power supply 2, and the voltage value of the high-voltage bus 5 is reduced to zero, so that.
After the power supply hardware protection circuit 3 compares the current value signal of the high-voltage bus 5 with the set power supply output average current value (the set power supply output average current value can be selected as 11.3A), and the protection signal disappears, the high-voltage high-power supply 2 and the high-voltage motor driving module 6 recover power output, and the high-voltage motor 10 recovers work.
The high-voltage high-power supply 2 is in short circuit or the high-voltage high-power supply 2 continuously works under a heavy load, the input bus current sampling circuit 4 detects a current value signal of the input bus 1 and sends the current value signal to the power supply hardware protection circuit (3), the power supply hardware protection circuit 3 compares the current value signal of the input bus 1 with a set average current value of the input bus (the set average current value of the input bus can be 45A) to generate a protection signal and sends the protection signal to the high-voltage high-power supply 2, the high-voltage high-power supply 2 turns off the power output of the high-voltage high-power supply 2, and the voltage value of the high-voltage bus.
After the power hardware protection circuit 3 compares the current value signal of the input bus 1 with the set average current value of the input bus (the set average current value of the input bus can be 45A) to generate a protection signal, the high-voltage high-power supply 2 and the high-voltage motor driving module 6 do not recover power output, and the high-voltage motor 10 still stops working. The high-voltage high-power supply 2, the high-voltage motor driving module 6 and the high-voltage motor 10 can not work again until the starting signal is continued.
In order to ensure that the high-voltage high-power motor driver and the high-voltage motor are not damaged in a fault state. Meanwhile, after the fault state disappears, the high-voltage high-power motor driver and the high-voltage motor can still work normally. The high-voltage high-power motor driver and the high-voltage motor have the following fault states: the high-voltage motor has overhigh temperature, overlarge winding current of the high-voltage motor, overhigh high-voltage bus current of a high-voltage high-power motor driver, overhigh high-voltage bus voltage of the high-voltage high-power motor driver and overhigh input bus power of the high-voltage high-power motor driver. Aiming at different fault states, different protection strategies are adopted to meet the protection requirements of a high-voltage motor driver and a high-voltage motor.
The high-voltage high-power motor driving protection strategy is realized by adopting software and hardware protection measures, the hardware protection measures can judge the fault state of the high-voltage high-power motor driver and the high-voltage high-power motor according to three-phase current signals of the high-voltage high-power motor, so that the corresponding protection measures are adopted to ensure that the high-voltage high-power motor driver and the high-voltage high-power motor safely release the fault state, and the high-voltage high-power motor driver can still recover normal work after the fault disappears, therefore, the strategy is particularly suitable for the high-voltage high-power motor driver applied in space.
The software and hardware protection measures can judge the fault state of the high-voltage high-power motor driver and the high-voltage high-power motor according to the three-phase current signal, the over-temperature signal and the rotating speed of the high-voltage high-power motor, so that corresponding protection measures are adopted. The high-voltage high-power driving module adopts software and hardware protection measures and adopts corresponding protection strategies aiming at instantaneous faults and long-time faults. The high-voltage high-power supply adopts hardware protection measures and adopts corresponding protection strategies aiming at instantaneous faults and unrecoverable faults.
The instantaneous faults are instantaneous locked rotor of the high-voltage high-power motor, instantaneous large-load disturbance of the high-voltage high-power motor, instantaneous sudden increase of current of a high-voltage bus and instantaneous sudden increase of the high-voltage bus, the long-time faults are that the high-voltage high-power motor is locked rotor for a long time, the high-voltage bus is overcurrent for a long time, the motor works at an ultralow rotating speed for a long time, the motor works at a high power at a low rotating speed, and the unrecoverable faults are that the.
The embodiment also provides a high-voltage high-power motor drive protection method, which comprises the following steps in combination with fig. 1:
when the high-voltage motor 10 is in instantaneous locked-rotor state and in instantaneous heavy-load disturbance of the high-voltage high-power motor, a three-phase current signal is acquired by a three-phase current detection circuit 9 and is transmitted to a driving hardware protection circuit 7, the driving hardware protection circuit 7 generates a protection signal according to the comparison between the three-phase current signal value and a set current value and transmits the protection signal to a high-voltage motor driving module 6, and the high-voltage motor driving module 6 turns off the power output of the high-voltage motor driving module 6 to stop the high-voltage motor 10, so that the high-voltage motor driving module 6 and the;
after the high-voltage motor 10 is instantaneously locked and rotated and the instantaneous large-load disturbance of the high-voltage high-power motor disappears, the driving hardware protection circuit 7 generates a protection releasing signal according to the comparison between the three-phase current signal value and the set instantaneous current value 28A and sends the protection releasing signal to the high-voltage motor driving module 6, the high-voltage motor driving module 6 restores the power output, and the high-voltage motor 10 restores the work;
the three-phase current detection circuit 9 acquires a three-phase current signal and transmits the three-phase current signal to the software protection circuit 8, the software protection circuit 8 judges that the time that the three-phase current signal exceeds a set instantaneous current value exceeds a set time value, a protection signal generated by the software protection circuit 8 is transmitted to the high-voltage motor driving module 6, and the high-voltage motor driving module 6 turns off the power output of the high-voltage motor driving module 6 to cause the high-voltage motor 10 to stop working;
the software protection circuit 8 compares the rotating speed of the high-voltage motor with a first set rotating speed value, if the rotating speed value of the motor is lower than the first set rotating speed value and continuously exceeds a set time value (the value of the set time value is 2 seconds), a protection signal generated by the software protection circuit 8 is sent to the high-voltage motor driving module 6, and the high-voltage motor driving module 6 turns off the power output of the high-voltage motor driving module, so that the high-voltage motor 10 stops working; if the motor rotating speed value is higher than the first set rotating speed value and lower than the second set rotating speed value and the three-phase current signal exceeds the first set average current value, the protection signal generated by the software protection circuit 8 is sent to the high-voltage motor driving module 6, and the high-voltage motor driving module 6 turns off the power output of the high-voltage motor driving module 6, so that the high-voltage motor 10 stops working;
the high-voltage bus current sampling circuit 11 acquires a peak current signal of a bus of the high-voltage bus 5 and sends the peak current signal to the software protection circuit 8, the software protection circuit 8 compares the peak current signal with a set average current value to generate a protection signal and sends the protection signal to the high-voltage motor driving module 6, and the high-voltage motor driving module 6 turns off the power output of the high-voltage motor driving module 6 to stop the work of the high-voltage motor 10, so that the high-voltage motor driving module 6 and the high-voltage motor 10 are;
a temperature signal of the high-voltage motor 10 is sent to the software protection circuit 8, the software protection circuit 8 compares the temperature signal with a set temperature value to generate a protection signal and sends the protection signal to the high-voltage motor driving module 6, and the high-voltage motor driving module 6 shuts off the power output of the high-voltage motor driving module to cause the high-voltage motor 10 to stop working, so that the high-voltage motor 10 is protected;
a high-voltage bus current transformer 12 of the high-voltage high-power supply 2 detects a current value signal of a high-voltage bus 5 and sends the current value signal to a power supply hardware protection circuit 3, the power supply hardware protection circuit 3 compares the current value with a set power supply output average current value to generate a protection signal and sends the protection signal to the high-voltage high-power supply 2, the high-voltage high-power supply 2 shuts off the power output of the high-voltage high-power supply 2, and the voltage value of the high-voltage bus 5 is reduced to zero, so that the high;
after the power supply hardware protection circuit 3 compares the output average current value with the set power supply to generate a protection signal to disappear, the high-voltage high-power supply 2 and the high-voltage motor driving module 6 recover power output, and the high-voltage motor 10 recovers to work;
the high-voltage high-power supply 2 is in short circuit or the high-voltage high-power supply 2 continuously works under a heavy load, the input bus current sampling circuit 4 detects the current value signal of the input bus 1 and sends the current value signal to the power supply hardware protection circuit 3, the power supply hardware protection circuit 3 compares the current value signal with the set average current value of the input bus to generate a protection signal and sends the protection signal to the high-voltage high-power supply 2, the high-voltage high-power supply 2 shuts off the power output of the high-voltage high-power supply 2, and the voltage value of the high-voltage bus 5 is reduced to.
The embodiment adopts different protection strategies aiming at different fault states, can judge the fault states of the high-voltage high-power motor driver and the high-voltage high-power motor, and simultaneously ensures the safety and the reliability of the motor driver and the high-voltage high-power motor. Different modules of the embodiment can set different priorities for protection strategies adopted for different fault states, instantaneous and recoverable faults are taken as low priorities, and long-time and unrecoverable faults are taken as high priorities, so that the high-voltage high-power motor driver and the high-voltage high-power motor can be ensured to timely recover normal operation after the instantaneous and recoverable faults disappear.
The above-described embodiments are merely preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (10)
1. A high-voltage high-power motor drive protection system is characterized by comprising: the device comprises a high-voltage motor driving module (6), a driving hardware protection circuit (7) and a three-phase current detection circuit (9); wherein,
when the high-voltage motor (10) is in instantaneous locked rotor and instantaneous heavy load disturbance, a three-phase current detection circuit (9) acquires a three-phase current signal and transmits the three-phase current signal to a driving hardware protection circuit (7), the driving hardware protection circuit (7) generates a protection signal according to the comparison between the three-phase current signal value and a set instantaneous current value and transmits the protection signal to a high-voltage motor driving module (6), and the high-voltage motor driving module (6) outputs the power of the high-voltage motor (10) to stop working;
after the high-voltage motor (10) is in instantaneous locked rotor and instantaneous heavy load disturbance disappears, the driving hardware protection circuit (7) generates a protection removing signal according to the comparison between the three-phase current signal value and a set instantaneous current value and sends the protection removing signal to the high-voltage motor driving module (6), the high-voltage motor driving module (6) recovers power output, and the high-voltage motor (10) recovers work.
2. The high voltage high power motor drive protection system of claim 1, further comprising: a software protection circuit (8); wherein,
the three-phase current detection circuit (9) collects three-phase current signals and sends the three-phase current signals to the software protection circuit (8), the software protection circuit (8) judges that the time that the three-phase current signals exceed a set instantaneous current value exceeds a set time value, a protection signal generated by the software protection circuit (8) is sent to the high-voltage motor driving module (6), and the high-voltage motor driving module (6) outputs the power of the high-voltage motor driving module to be cut off, so that the high-voltage motor (10) stops working;
the software protection circuit (8) compares the rotating speed of the high-voltage motor (10) with a first set rotating speed value, if the rotating speed value of the motor is lower than the first set rotating speed value and continuously exceeds a set time value, a protection signal generated by the software protection circuit (8) is sent to the high-voltage motor driving module (6), and the high-voltage motor driving module (6) outputs the power of the high-voltage motor (10) to be cut off, so that the high-voltage motor (10) stops working; if the motor rotating speed value is higher than the first set rotating speed value and lower than the second set rotating speed value and the three-phase current signal exceeds the first set average current value, the protection signal generated by the software protection circuit (8) is sent to the high-voltage motor driving module (6), and the high-voltage motor driving module (6) shuts off the power output of the high-voltage motor driving module, so that the high-voltage motor (10) stops working.
3. The high voltage high power motor drive protection system according to claim 2, further comprising: the high-voltage bus (5) and the high-voltage bus current sampling circuit (11); wherein,
the high-voltage bus current sampling circuit (11) collects a bus peak current signal of the high-voltage bus (5) and sends the bus peak current signal to the software protection circuit (8), the software protection circuit (8) compares the bus peak current signal with a second set average current value to generate a protection signal and sends the protection signal to the high-voltage motor driving module (6), and the high-voltage motor driving module (6) turns off the power output of the high-voltage motor driving module, so that the high-voltage motor (10) stops working.
4. The high-voltage high-power motor drive protection system according to claim 3, further comprising: the temperature signal of the high-voltage motor (10) is sent to the software protection circuit (8), the software protection circuit (8) compares the temperature signal with a set temperature value to generate a protection signal and sends the protection signal to the high-voltage motor driving module (6), and the high-voltage motor driving module (6) shuts off the power output of the high-voltage motor (10) so that the high-voltage motor (10) stops working.
5. The high-voltage high-power motor drive protection system according to claim 4, further comprising: a high-voltage high-power supply (2) and a power supply hardware protection circuit (3); wherein,
a high-voltage bus current transformer (12) of the high-voltage high-power supply (2) detects a current value signal of a high-voltage bus (5) and sends the current value signal to a power supply hardware protection circuit (3), the power supply hardware protection circuit (3) compares the current value with a set power supply output average current value to generate a protection signal and sends the protection signal to the high-voltage high-power supply (2), the high-voltage high-power supply (2) shuts off the power output of the high-voltage high-power supply, and the voltage value of the high-voltage bus (5) is reduced to zero, so that a high-voltage motor driving;
after the power supply hardware protection circuit (3) compares the output average current value of the power supply with a set power supply to generate a protection signal and disappears, the high-voltage high-power supply (2) and the high-voltage motor driving module (6) recover power output, and the high-voltage motor (10) recovers to work.
6. The high-voltage high-power motor drive protection system according to claim 5, further comprising: the device comprises an input bus (1) and an input bus current sampling circuit (4); wherein,
the high-voltage high-power supply (2) is short-circuited or the high-voltage high-power supply (2) continuously works under a heavy load, the input bus current sampling circuit (4) detects the current value signal of the input bus (1) and sends the current value signal to the power supply hardware protection circuit (3), the power supply hardware protection circuit (3) compares the current value signal with the set average current value of the input bus to generate a protection signal and sends the protection signal to the high-voltage high-power supply (2), the high-voltage high-power supply (2) outputs the power of the high-voltage high-power supply (2) in a turn-off mode, and the voltage value of the high-voltage bus (5).
7. The high-voltage high-power motor drive protection system according to claim 1, characterized in that: the set instantaneous current value was 28A.
8. The high-voltage high-power motor drive protection system according to claim 2, characterized in that: the set time value is 2 seconds.
9. The high-voltage high-power motor drive protection system according to claim 2, characterized in that: the first set average current value is 5A.
10. A high-voltage high-power motor drive protection method is characterized by comprising the following steps:
when the high-voltage motor (10) is in instantaneous locked rotor and instantaneous heavy load disturbance, a three-phase current detection circuit (9) acquires a three-phase current signal and transmits the three-phase current signal to a driving hardware protection circuit (7), the driving hardware protection circuit (7) generates a protection signal according to the comparison between the three-phase current signal value and a set instantaneous current value and transmits the protection signal to a high-voltage motor driving module (6), and the high-voltage motor driving module (6) outputs the power of the high-voltage motor (10) to stop working;
after the high-voltage motor (10) is instantaneously locked and rotated and the high-voltage high-power motor is instantaneously and heavily loaded and disturbed to disappear, the driving hardware protection circuit (7) generates a protection releasing signal according to the comparison between the three-phase current signal value and the set instantaneous current value and sends the protection releasing signal to the high-voltage motor driving module (6), the high-voltage motor driving module (6) outputs the recovery power, and the high-voltage motor (10) recovers to work;
the three-phase current detection circuit (9) collects three-phase current signals and sends the three-phase current signals to the software protection circuit (8), the software protection circuit (8) judges that the time that the three-phase current signals exceed a set instantaneous current value exceeds a set time value, a protection signal generated by the software protection circuit (8) is sent to the high-voltage motor driving module (6), and the high-voltage motor driving module (6) outputs the power of the high-voltage motor driving module to be cut off, so that the high-voltage motor (10) stops working;
the software protection circuit compares the rotating speed of the high-voltage motor with a first set rotating speed value, if the rotating speed value of the motor is lower than the first set rotating speed value and continuously exceeds a set time value, a protection signal generated by the software protection circuit (8) is sent to the high-voltage motor driving module (6), and the high-voltage motor driving module (6) turns off the power output of the high-voltage motor driving module to enable the high-voltage motor (10) to stop working; if the motor rotating speed value is higher than the first set rotating speed value and lower than the second set rotating speed value and the three-phase current signal exceeds the first set average current value, the protection signal generated by the software protection circuit (8) is sent to the high-voltage motor driving module (6), and the high-voltage motor driving module (6) turns off the power output of the high-voltage motor driving module to enable the high-voltage motor (10) to stop working;
the high-voltage bus current sampling circuit (11) collects a peak current signal of a bus of the high-voltage bus (5) and sends the peak current signal to the software protection circuit (8), the software protection circuit (8) compares the peak current signal with a second set average current value to generate a protection signal and sends the protection signal to the high-voltage motor driving module (6), and the high-voltage motor driving module (6) turns off the power output of the high-voltage motor driving module to enable the high-voltage motor (10) to stop working;
a temperature signal of the high-voltage motor (10) is sent to the software protection circuit (8), the software protection circuit (8) compares the temperature signal with a set temperature value to generate a protection signal and sends the protection signal to the high-voltage motor driving module (6), and the high-voltage motor driving module (6) shuts off the power output of the high-voltage motor driving module to stop the high-voltage motor (10);
a high-voltage bus current transformer (12) of the high-voltage high-power supply (2) detects a current value signal of a high-voltage bus (5) and sends the current value signal to a power supply hardware protection circuit (3), the power supply hardware protection circuit (3) compares the current value with a set power supply output average current value to generate a protection signal and sends the protection signal to the high-voltage high-power supply (2), the high-voltage high-power supply (2) shuts off the power output of the high-voltage high-power supply, and the voltage value of the high-voltage bus (5) is reduced to zero, so that a high-voltage motor driving;
after the power supply hardware protection circuit (3) compares the output average current value of the power supply with a set power supply to generate a protection signal to disappear, the high-voltage high-power supply (2) and the high-voltage motor driving module (6) recover power output, and the high-voltage motor (10) recovers to work;
the high-voltage high-power supply (2) is short-circuited or the high-voltage high-power supply (2) continuously works under a heavy load, the input bus current sampling circuit (4) detects the current value signal of the input bus (1) and sends the current value signal to the power supply hardware protection circuit (3), the power supply hardware protection circuit (3) compares the current value signal with the set average current value of the input bus to generate a protection signal and sends the protection signal to the high-voltage high-power supply (2), the high-voltage high-power supply (2) outputs the power of the high-voltage high-power supply (2) in a turn-off mode, and the voltage value of the high-voltage bus (5).
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| CN111404115A (en) * | 2020-06-04 | 2020-07-10 | 新誉轨道交通科技有限公司 | Safety protection circuit |
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