CN107219844B - Power module power-on self-test method, device and storage medium - Google Patents
Power module power-on self-test method, device and storage medium Download PDFInfo
- Publication number
- CN107219844B CN107219844B CN201710474479.6A CN201710474479A CN107219844B CN 107219844 B CN107219844 B CN 107219844B CN 201710474479 A CN201710474479 A CN 201710474479A CN 107219844 B CN107219844 B CN 107219844B
- Authority
- CN
- China
- Prior art keywords
- power
- bridge arm
- power tube
- power module
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
Abstract
The invention discloses a power module power-on self-test method, a power module power-on self-test device and a storage medium, wherein the power module power-on self-test method comprises the following steps: respectively obtaining the current values of an upper bridge arm and a lower bridge arm in each phase of the power module when the upper bridge arm and the lower bridge arm are alternately conducted; and comparing the obtained current value with a set current threshold, and judging whether the bridge arm is short-circuited according to the comparison result. The technical scheme of the invention improves the safety of the power module.
Description
Technical Field
The invention relates to the technical field of motor driving, in particular to a power module power-on self-test method, a power module power-on self-test device and a storage medium.
Background
An IPM (Intelligent Power Module) is used as an integrated Power device including an IGBT driving chip and a peripheral driving and protection circuit, and the Intelligent Power Module has the advantages of fast switching response speed, strong load-resisting capability, small base driving current, and the like.
The application of the intelligent power integrated circuit is ubiquitous, and the intelligent power integrated circuit has a very wide market from household appliance illumination, household and commercial variable frequency air conditioners, various consumer electronics products in daily life to the fields of industrial application control, robots and the like. The IPM is integrated with a three-phase full-bridge inverter unit, and when the interior of the IPM is short-circuited, electromechanical equipment is damaged, so that the IPM needs to be detected for open-circuit or short-circuit faults.
The conventional IPM depends on motor sampling current for detection and protection, and if the IPM has a short-circuit fault before the motor is electrified, the IPM cannot be detected, namely, the self-detection function before the IPM is electrified cannot be realized.
Disclosure of Invention
The invention mainly aims to provide a power-on self-test method of a power module, aiming at improving the safety of the power module.
In order to achieve the above object, the power module power-on self-test method provided by the present invention comprises:
respectively obtaining the current values of an upper bridge arm and a lower bridge arm in each phase of the power module when the upper bridge arm and the lower bridge arm are alternately conducted;
and comparing the obtained current value with a set current threshold, and judging whether the bridge arm is short-circuited according to the comparison result.
Preferably, the method further comprises:
acquiring a bus voltage of a power module, applying a preset voltage to a connecting point of an upper bridge arm and a lower bridge arm of each phase, and acquiring a saturated voltage drop of the upper bridge arm and the lower bridge arm of each phase;
acquiring the voltage to ground at each connecting point, comparing the voltage to ground with the saturation voltage drop of the corresponding upper bridge arm, and judging whether each upper bridge arm is open-circuited according to the comparison result;
canceling preset voltage applied at each connecting point, applying preset d-axis current and preset q-axis current to the motor stator, and controlling the motor stator to be positioned at positions with position angles different by preset angles respectively;
and respectively acquiring the current values of all phases when the power module is positioned at different position angles, and judging whether all the lower bridge arms are open-circuited according to a preset rule.
Preferably, the power module is a three-phase power module, and the step of comparing the obtained current value with a set current threshold and determining whether a bridge arm short circuit exists according to the comparison result includes:
in the same phase, when the upper bridge arm is disconnected and the lower bridge arm is connected, if the obtained current value is greater than a preset current threshold value, the upper bridge arm is judged to be short-circuited; if not, judging that the upper bridge arm is not short-circuited;
when the upper bridge arm is switched on and the lower bridge arm is switched off, if the obtained current value is greater than a preset current threshold value, judging that the lower bridge arm is short-circuited; if not, judging that the lower bridge arm is not short-circuited.
Preferably, the step of comparing the voltage to ground with the saturation voltage drop of the corresponding upper bridge arm and judging whether each upper bridge arm is open-circuited according to the comparison result includes:
subtracting the voltage to ground from the bus voltage to obtain a midpoint voltage, comparing the midpoint voltage with the saturation voltage drop of the corresponding upper bridge arm, and judging that the upper bridge arm is not open-circuited if the midpoint voltage is smaller than the saturation voltage drop of the corresponding upper bridge arm; if not, the upper bridge arm is judged to be open.
Preferably, the power module is a three-phase power module, and the step of controlling the position of the stator of the motor at the position where the position angle differs from the preset angle includes:
the stator of the motor is controlled to be sequentially positioned at three angular positions of 0 degree, 120 degrees and 240 degrees.
Preferably, the preset d-axis current is equal to a motor stator current, and the preset q-axis current is zero.
Preferably, the power module is a three-phase power module, a first phase upper bridge arm of the power module comprises a first power tube, and a lower bridge arm of the power module comprises a second power tube; a second phase upper bridge arm of the power module comprises a third power tube, and a lower bridge arm of the power module comprises a fourth power tube; a third phase upper bridge arm of the power module comprises a fifth power tube, and a lower bridge arm of the power module comprises a sixth power tube; the obtained three-phase current values are Iu, Iv and Iw respectively; the step of presetting d-axis current as Is, wherein the step of respectively obtaining the current values of all phases of the power module at different position angles and judging whether all lower bridge arms are open-circuited according to a preset rule comprises the following steps of:
if Iu Is equal to Is and Iv Iw Is equal to Is, the first power tube, the fourth power tube and the sixth power tube are all normal;
if Iu Is equal to Is, Iv Is equal to-Is, and Iw Is equal to 0, the first power tube and the fourth power tube are normal, and the sixth power tube Is open-circuited;
if Iu Is equal to Is, Iv Is equal to 0, and Iw Is equal to Is, the first power tube and the sixth power tube are normal, and the fourth power tube Is open;
if Iv Is, Iu Iw Is, then the third power tube, the second power tube and the sixth power tube are normal;
if Iv Is, Iu Is, and Iw Is 0, the third power tube and the second power tube are normal, and the sixth power tube Is open;
if Iv Is, Iu Is 0, and Iw Is-Is, the third power tube and the sixth power tube are normal, and the second power tube Is open-circuited;
if Iw Is equal to Is and Iu Is equal to Is, the fifth power tube, the second power tube and the sixth power tube are normal;
if Iw Is equal to Is, Iu Is equal to-Is, and Iv Is equal to 0, the fifth power tube and the second power tube are normal, and the sixth power tube Is open-circuited;
and if Iw Is equal to Is, Iu Is equal to-0, and Iv Is equal to-Is, the fifth power tube and the sixth power tube are normal, and the second power tube Is open-circuited.
Preferably, the power module power-on self-test apparatus includes a memory, a processor, and a control program of the power module power-on self-test method stored in the memory and running on the processor, where the control program of the power module power-on self-test method implements the steps of the method when executed by the processor.
The invention provides a frequency conversion device which comprises the power module power-on self-test device.
The invention also provides a storage medium, wherein a control program of the power module power-on self-test method is stored in the storage medium, and the power module power-on self-test method control program realizes the steps of the power module power-on self-test method when being executed by a processor.
According to the technical scheme, the lower bridge arm or the upper bridge arm is bootstrapped by adopting a method of booting the lower bridge arm or booting the upper bridge arm in the same phase in sequence to detect the lower bridge arm or booting the lower bridge arm to detect the upper bridge arm, current values of the upper bridge arm and the lower bridge arm in each phase of the power module are respectively obtained when the upper bridge arm and the lower bridge arm are alternately conducted, and the obtained current values are compared with a set current threshold value to detect which specific bridge arm power tube has a short-circuit fault. According to the technical scheme, the power module can be checked before the motor is powered on, so that the reliability and the safety of the power module are further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a flowchart of a power module power-on self-test method according to an embodiment of the present invention;
FIG. 2 is another flowchart of a power module power-on self-test method according to an embodiment of the present invention;
FIG. 3 is a functional block diagram of an embodiment of the frequency conversion apparatus of the present invention;
FIG. 4 is a schematic diagram of an IPM according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating an embodiment of a main procedure of the frequency conversion apparatus according to the present invention;
FIG. 6 is a flow chart of one embodiment of power module short detection according to the present invention;
FIG. 7 is a flowchart of an embodiment of upper bridge arm open circuit detection according to the present invention;
FIG. 8 is a flowchart of one embodiment of the lower bridge arm open circuit detection when the motor stator position angle is 0 degrees according to the present invention;
FIG. 9 is a flowchart of an embodiment of the lower bridge arm open circuit detection when the motor stator position angle is 120 degrees according to the present invention;
fig. 10 is a flowchart of detecting the open circuit of the lower bridge arm when the stator position angle of the motor is 240 °.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should be considered to be absent and not within the protection scope of the present invention.
The invention provides a power module power-on self-test method.
Referring to fig. 1, in an embodiment of the present invention, a power module power-on self-test method provided by the present invention includes:
s100, respectively obtaining current values of an upper bridge arm and a lower bridge arm in each phase of the power module when the upper bridge arm and the lower bridge arm are alternately conducted;
s200, comparing the obtained current value with a set current threshold, and judging whether a bridge arm is short-circuited according to a comparison result.
It should be noted that, in this embodiment, the power module includes a first phase, a second phase, and a third phase, where the first phase includes a first power tube and a second power tube, and is sequentially located on the upper bridge arm and the lower bridge arm; the second phase comprises a third power tube and a fourth power tube which are sequentially positioned on the upper bridge arm and the lower bridge arm; the third phase comprises a fifth power tube and a sixth power tube which are sequentially arranged on the upper bridge arm and the lower bridge arm.
Referring to fig. 4, in the present embodiment, the first power transistor to the sixth power transistor are all IGBT transistors, and are IGBT1 to IGBT6 in this order.
The current threshold value of hardware and software short circuit is set firstly during power-on, and the setting of the current threshold value needs to be carried out by combining an IPM data manual and appropriately reserving certain margin. Then, the IGBTs 1 to 6 are sequentially turned on at a certain detection time, only one power tube is turned on at a time, and the rest power tubes are turned off. For example, if the IGBT2 of the lower arm is short-circuited, the IGBT1 of the upper arm is turned on, the IGBTs 2 to 6 are turned off, and it is determined whether the current flowing through the IGBT1 exceeds a preset current threshold within the detection time for turning on the IGBT1, and if an overcurrent occurs, it is determined that the IGBT2 is short-circuited, and a fault function is processed. The short circuit judgment of the other power tubes is the same, and the short circuit judgment of the IGBTs 1-6 can be sequentially and completely judged through 6 similar judgments.
According to the technical scheme, the lower bridge arm or the upper bridge arm is bootstrapped by adopting a method of booting the lower bridge arm or booting the upper bridge arm in the same phase in sequence to detect the lower bridge arm or booting the lower bridge arm to detect the upper bridge arm, current values of the upper bridge arm and the lower bridge arm in each phase of the power module are respectively obtained when the upper bridge arm and the lower bridge arm are alternately conducted, and the obtained current values are compared with a set current threshold value to detect which specific bridge arm power tube has a short-circuit fault. According to the technical scheme, the power module can be checked before the motor is powered on, so that the reliability and the safety of the power module are further improved.
Further, referring to fig. 2, the method further includes:
s300, acquiring a bus voltage of the power module, applying a preset voltage to a connecting point of an upper bridge arm and a lower bridge arm of each phase, and acquiring the saturation voltage drop of the upper bridge arm and the lower bridge arm of each phase;
s400, obtaining the voltage to ground at each connecting point, comparing the voltage to ground with the saturation voltage drop of the corresponding upper bridge arm, and judging whether each upper bridge arm is open-circuited according to the comparison result;
s500, canceling preset voltages applied to the connecting points, applying preset d-axis current and preset q-axis current to the motor stator, and controlling the motor stator to be located at positions with position angles different by preset angles;
s600, current values of all phases of the power module at different positions and angles are respectively obtained, and whether each lower bridge arm is in an open circuit or not is judged according to a preset rule.
It should be noted that, in step S300, in this embodiment, the power module includes a first phase, a second phase and a third phase, and the preset voltages Vun, Vvn and Vwn are applied to the connection points of the upper arm and the lower arm of the first phase, the second phase and the third phase, respectively.
To determine whether the IGBT1 is open, the bus voltage Vpn is first obtained, and then a certain Vun, Vvn, and Vwn voltages are applied during the detection time of the IGBT1 to form a loop using the IGBT1 as a detection, for example: bus P → IGBT1 → PMSM → IGBT4 and IGBT6 → bus N, etc., and detects Vpu during this time, if Vpu ≦ Vcesat, then it is said that IGBT1 has been turned on; if the IGBT1 is not open, otherwise it indicates that the IGBT1 is open, and a steering fault function is required. According to the same principle, whether the IGBTs 3 and 5 are open or not can be judged.
Whether or not the IGBTs 2, 4, and 6 of the other lower arm are open is determined by the following method:
and then removing the corresponding applied voltage, controlling the position angle of the rotor to be α ═ 0 °, 120 ° and 240 °, respectively, applying the values Id and Iq in the corresponding two-phase equivalent rotating coordinate system, and controlling Id ═ Is and Iq ═ 0, wherein Id and Iq are direct current quantities in equivalent coordinate transformation in a no-position vector control system, and Is a stator current of a Permanent Magnet Synchronous Motor (PMSM), wherein it Is required to control that Is smaller than the maximum peak current of the PMSM.
At the moment, direct current is equivalently led into a motor winding, a rotating magnetic field cannot be generated due to the fact that the direct current is led into the motor winding, a constant pulse vibration magnetic field can still be generated, the rotor rotates to a corresponding angle according to the vector synthesis of the stator current, and the open circuit condition of the bridge arm under the condition is detected according to the principle.
Specifically, the power module is a three-phase power module, and the step of comparing the obtained current value with a set current threshold and judging whether a bridge arm short circuit exists according to the comparison result includes:
in the same phase, when the upper bridge arm is disconnected and the lower bridge arm is connected, if the obtained current value is greater than a preset current threshold value, the upper bridge arm is judged to be short-circuited; if not, judging that the upper bridge arm is not short-circuited;
when the upper bridge arm is switched on and the lower bridge arm is switched off, if the obtained current value is greater than a preset current threshold value, judging that the lower bridge arm is short-circuited; if not, judging that the lower bridge arm is not short-circuited.
Specifically, the step of comparing the voltage to ground with the saturation voltage drop of the corresponding upper bridge arm and judging whether each upper bridge arm is open-circuited according to the comparison result includes:
subtracting the voltage to ground from the bus voltage to obtain a midpoint voltage, comparing the midpoint voltage with the saturation voltage drop of the corresponding upper bridge arm, and judging that the upper bridge arm is not open-circuited if the midpoint voltage is smaller than the saturation voltage drop of the corresponding upper bridge arm; if not, the upper bridge arm is judged to be open.
Specifically, the power module is a three-phase power module, and controlling the position of the motor stator at the position where the position angle differs from the preset angle respectively includes:
the stator of the motor is controlled to be sequentially positioned at three angular positions of 0 degree, 120 degrees and 240 degrees.
Specifically, the preset d-axis current is equal to a motor stator current, and the preset q-axis current is zero.
Specifically, the power module is a three-phase power module, a first phase upper bridge arm of the power module comprises a first power tube, and a lower bridge arm of the power module comprises a second power tube; a second phase upper bridge arm of the power module comprises a third power tube, and a lower bridge arm of the power module comprises a fourth power tube; a third phase upper bridge arm of the power module comprises a fifth power tube, and a lower bridge arm of the power module comprises a sixth power tube; the obtained three-phase current values are Iu, Iv and Iw respectively; the step of presetting d-axis current as Is, wherein the step of respectively obtaining the current values of all phases of the power module at different position angles and judging whether all lower bridge arms are open-circuited according to a preset rule comprises the following steps of:
(1) if Iu Is equal to Is and Iv Iw Is equal to Is, the first power tube, the fourth power tube and the sixth power tube are all normal;
(2) if Iu Is equal to Is, Iv Is equal to-Is, and Iw Is equal to 0, the first power tube and the fourth power tube are normal, and the sixth power tube Is open-circuited;
(3) if Iu Is equal to Is, Iv Is equal to 0, and Iw Is equal to Is, the first power tube and the sixth power tube are normal, and the fourth power tube Is open;
(4) if Iv Is, Iu Iw Is, then the third power tube, the second power tube and the sixth power tube are normal;
(5) if Iv Is, Iu Is, and Iw Is 0, the third power tube and the second power tube are normal, and the sixth power tube Is open;
(6) if Iv Is, Iu Is 0, and Iw Is-Is, the third power tube and the sixth power tube are normal, and the second power tube Is open-circuited;
(7) if Iw Is equal to Is and Iu Is equal to Is, the fifth power tube, the second power tube and the sixth power tube are normal;
(8) if Iw Is equal to Is, Iu Is equal to-Is, and Iv Is equal to 0, the fifth power tube and the second power tube are normal, and the sixth power tube Is open-circuited;
(9) and if Iw Is equal to Is, Iu Is equal to-0, and Iv Is equal to-Is, the fifth power tube and the sixth power tube are normal, and the second power tube Is open-circuited.
It should be noted that when Id Is and Iq 0 are applied to the rotational coordinate system and the rotor position angle Is controlled to α, 0 °, 120 ° and 240 °, the currents Iu, Iv and Iw are detected, and the determination Is made comprehensively based on the above-mentioned columns (1) to (9), whereby it Is possible to determine which power device in which arm in the IPM has an open circuit fault.
The technical scheme of the invention judges according to the detected three-phase current flow conditions of the motor, at the moment, three-phase current vectors are respectively synthesized in the directions of 0 degrees, 120 degrees and 240 degrees, when α degrees Is equal to 0 degrees, the current passes through a bus P → IGBT1 → IGBT4, IGBT6 → a bus N loop, if IGBT1, IGBT4 and IGBT6 are normal, Iu Is equal to Is, Iv Is equal to Iw Is equal to Is, and the amplitudes of Iv and Iw are far greater than 1 ampere, namely, the U-phase current Is the motor stator current, and the V, W-phase current Is opposite to the U-phase current.
Therefore, if Iu Is equal to Is, Iv Is equal to 0, and Iw Is equal to Is, it can be determined that the IGBT4 Is open; if Iu Is, Iv Is, and Iw Is 0, the IGBT6 may be determined to be open. Therefore, the software can judge the quality of the power tubes of the lower bridge IGBT4 and the IGBT6 by only detecting the 3 conditions. Similarly, the angular position of the motor rotor is 120 degrees and 240 degrees, and whether all the lower bridges are open or normal can be judged.
The invention provides a power module power-on self-test device which comprises a memory, a processor and a control program of a power module power-on self-test method stored on the memory and operated on the processor, wherein the control program of the power module power-on self-test method realizes the steps of the method when being executed by the processor.
The present invention further provides a frequency conversion apparatus, which includes a power module power-on self-test apparatus, and the specific structure of the subject one refers to the foregoing embodiments, and since the subject two employs all technical solutions of all the foregoing embodiments, the present invention at least has all beneficial effects brought by the technical solutions of the foregoing embodiments, and details are not repeated herein.
Referring to fig. 3, in the present embodiment, the inverter device is applied to an air conditioner. The frequency conversion device comprises a rectifier bridge (not marked), a soft start circuit (not marked), a controller 10, a bus voltage detection module 30, a motor current sampling module 20, a driving module 50 and a fault detection module 40. The resistor R1 and the switch K1 form a soft start circuit. The controller is realized by adopting a control chip TMS320F28 series DSP. And the bus voltage detection module detects the bus voltage PN. The motor current sampling module samples two-phase current of the PMSM. The driving module is used for amplifying the power of the six paths of PWM control signals output by the controller and outputting the six paths of PWM control signals to the IPM. In the figure, a capacitor C1 and a capacitor C2 are charging filter electrolytic capacitors, and R2 and R3 are bus voltage equalizing circuits of the capacitors. The IPM and the PSPM form an inverter main loop.
In summary, the main procedure of the PMSM position sensorless vector control system is further described with reference to fig. 5:
the system runs according to the following sequence after starting up:
s101, system power-on self-test;
s102, judging whether the self-checking is finished or not, if not, returning to S101, and if so, acquiring S103 parameters;
s104, after acquiring necessary parameters, entering initial waiting;
s105, carrying out communication waiting;
s106, judging whether a starting instruction of the upper computer is received in real time, if not, returning to the step S105, and if so, entering the next step;
s107, PMSM soft start;
s108 to S116 judge whether a fault occurs or not and carry out fault processing.
Further, referring to fig. 6, the short circuit detection of the power tube in the present invention is explained:
s201, in this embodiment, in the short circuit detection mode, a current threshold Isc is set first, and a bus voltage and a threshold Vcesat after the power tube is turned on are obtained;
s202, entering a short circuit self-checking mode, and sequentially obtaining current values when power tubes of all phases are alternately conducted;
s203, judging whether the obtained current value is larger than a set current threshold Isc;
s204, if yes, determining which power tube of the bridge arm has a short-circuit fault;
s205, if not, judging whether the short circuit self-checking mode is finished, and if not, returning to continue judging; and if the detection is finished, entering an open circuit detection mode.
In the open circuit detection, referring to fig. 7, the IGBTs 1, 3, and 5 of the upper arm of the power module are first detected. Here, referring to steps S301 to S309, voltages Vun, Vvn, and Vwn are sequentially applied to the connection points of the upper and lower arms of the power module, corresponding midpoint voltages Vpu, Vpv, and Vpw are acquired, and Vpu, Vpv, and Vpw are compared with the corresponding saturation voltage drops to determine whether or not the IGBT1, the IGBT3, and the IGBT5 are open-circuited.
With reference to fig. 8, 9, and 10, the open determination of the IGBTs 2, 4, and 6 of the lower arm is made when the motor rotor is at a position angle of 0 °, 120 °, and 240 °, respectively, as shown in fig. 8, 9, and 10.
Referring to steps S401 to S407, here, an equivalent dc component Is applied to the stator of the motor, and the d-axis current Is Id — Is, where Is equal to the motor rotor current; the q-axis current is zero. The open-circuit conditions of the IGBT2, the IGBT4 and the IGBT6 can be judged by detecting the three-phase currents Iu, Iv and Iw of the motor and comparing and judging the three-phase currents with a preset rule.
After the detection judgment of the 0 ° position angle is completed, the detection judgment of the 120 ° position angle is performed, referring to steps S501 to S507, which is similar to the detection judgment of the 0 ° position angle and is not repeated here.
Finally, referring to steps S601 to S607, a detection determination is made when the position angle is 240 °. And after finishing judging all the position angles, quitting the self-checking.
The technology of the invention provides a fault self-checking function of an IPM module before power-on, different detection methods are carried out aiming at short-circuit faults and open-circuit faults of the IPM module, a method of bootstrapping a lower bridge arm or bootstrapping an upper bridge arm is carried out in the case of short-circuit faults, all upper bridge arms are opened to detect the lower bridge arm, or all lower bridge arms are opened to detect the upper bridge arm, each power tube of the IPM module is gradually opened, and a specific power tube short-circuit fault is detected; for open-circuit faults, the specific device of the IPM module open-circuit faults is obtained by combining motor open-phase detection, bus voltage sampling, rotor position angle and comprehensive judgment of motor stator current.
The invention also provides a storage medium, wherein a control program of the power module power-on self-test method is stored in the storage medium, and the power module power-on self-test method control program realizes the steps of the power module power-on self-test method when being executed by a processor.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A power module power-on self-test method is characterized by comprising the following steps:
respectively obtaining the current values of an upper bridge arm and a lower bridge arm in each phase of the power module when the upper bridge arm and the lower bridge arm are alternately conducted; when the current value of the upper bridge arm in one phase is obtained, the power tube in the upper bridge arm in the phase is switched on, and the rest power tubes are switched off; when the current value of the lower bridge arm in one phase is obtained, the power tube in the lower bridge arm in the phase is switched on, and the rest power tubes are switched off;
comparing the obtained current value with a set current threshold, and judging whether a bridge arm is short-circuited according to a comparison result;
acquiring a bus voltage of a power module, applying a preset voltage to a connecting point of an upper bridge arm and a lower bridge arm of each phase, and acquiring a saturated voltage drop of the upper bridge arm and the lower bridge arm of each phase;
acquiring the voltage to ground at each connecting point, comparing the voltage to ground with the saturation voltage drop of the corresponding upper bridge arm, and judging whether each upper bridge arm is open-circuited according to the comparison result;
canceling preset voltage applied at each connecting point, applying preset d-axis current and preset q-axis current to the motor stator, and controlling the motor stator to be positioned at positions with position angles different by preset angles respectively;
and respectively acquiring the current values of all phases when the power module is positioned at different position angles, and judging whether all the lower bridge arms are open-circuited according to a preset rule.
2. The power-on self-test method of the power module according to claim 1, wherein the power module is a three-phase power module, and the step of comparing the obtained current value with the set current threshold and determining whether the bridge arm is short-circuited according to the comparison result comprises the steps of:
in the same phase, when the upper bridge arm is disconnected and the lower bridge arm is connected, if the obtained current value is greater than a preset current threshold value, the upper bridge arm is judged to be short-circuited; if not, judging that the upper bridge arm is not short-circuited;
when the upper bridge arm is switched on and the lower bridge arm is switched off, if the obtained current value is greater than a preset current threshold value, judging that the lower bridge arm is short-circuited; if not, judging that the lower bridge arm is not short-circuited.
3. The power-on self-test method of claim 1, wherein the step of comparing the voltage to ground with the saturation voltage drop of the corresponding upper bridge arm and determining whether each upper bridge arm is open-circuited according to the comparison result comprises the steps of:
subtracting the voltage to ground from the bus voltage to obtain a midpoint voltage, comparing the midpoint voltage with the saturation voltage drop of the corresponding upper bridge arm, and judging that the upper bridge arm is not open-circuited if the midpoint voltage is smaller than the saturation voltage drop of the corresponding upper bridge arm; if not, the upper bridge arm is judged to be open.
4. The power-on self-test method for the power module according to claim 1, wherein the power module is a three-phase power module, and the step of controlling the position of the stator of the motor at the position where the position angle differs from the preset angle comprises:
the stator of the motor is controlled to be sequentially positioned at three angular positions of 0 degree, 120 degrees and 240 degrees.
5. The power-on self-test method of claim 1, wherein the preset d-axis current is equal to a motor stator current, and the preset q-axis current is zero.
6. The power-on self-test method of the power module according to claim 1, wherein the power module is a three-phase power module, a first phase upper bridge arm of the power module comprises a first power tube, and a lower bridge arm of the power module comprises a second power tube; a second phase upper bridge arm of the power module comprises a third power tube, and a lower bridge arm of the power module comprises a fourth power tube; a third phase upper bridge arm of the power module comprises a fifth power tube, and a lower bridge arm of the power module comprises a sixth power tube; the current value of each phase is a three-phase current value, and the three-phase current values are Iu, Iv and Iw respectively; presetting d-axis current as Is, and Is characterized in that the step of respectively acquiring current values of all phases of the power module at different position angles and judging whether all lower bridge arms are open-circuited according to a preset rule comprises the following steps of:
if Iu Is equal to Is and Iv Iw Is equal to Is, the first power tube, the fourth power tube and the sixth power tube are all normal;
if Iu Is equal to Is, Iv Is equal to-Is, and Iw Is equal to 0, the first power tube and the fourth power tube are normal, and the sixth power tube Is open-circuited;
if Iu Is equal to Is, Iv Is equal to 0, and Iw Is equal to Is, the first power tube and the sixth power tube are normal, and the fourth power tube Is open;
if Iv Is, Iu Iw Is, then the third power tube, the second power tube and the sixth power tube are normal;
if Iv Is, Iu Is, and Iw Is 0, the third power tube and the second power tube are normal, and the sixth power tube Is open;
if Iv Is, Iu Is 0, and Iw Is-Is, the third power tube and the sixth power tube are normal, and the second power tube Is open-circuited;
if Iw Is equal to Is and Iu Is equal to Is, the fifth power tube, the second power tube and the sixth power tube are normal;
if Iw Is equal to Is, Iu Is equal to-Is, and Iv Is equal to 0, the fifth power tube and the second power tube are normal, and the sixth power tube Is open-circuited;
and if Iw Is equal to Is, Iu Is equal to-0, and Iv Is equal to-Is, the fifth power tube and the sixth power tube are normal, and the second power tube Is open-circuited.
7. A power module power-on self-test device, comprising a memory, a processor and a control program of a power module power-on self-test method stored in the memory and running on the processor, wherein the control program of the power module power-on self-test method implements the steps of the method according to any one of claims 1 to 6 when executed by the processor.
8. A frequency conversion apparatus, characterized in that the frequency conversion apparatus comprises the power module power-on self-test apparatus according to claim 7.
9. A storage medium, wherein a control program of a power module power-on self-test method is stored on the storage medium, and when executed by a processor, the control program of the power module power-on self-test method implements the steps of the power module power-on self-test method according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710474479.6A CN107219844B (en) | 2017-06-20 | 2017-06-20 | Power module power-on self-test method, device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710474479.6A CN107219844B (en) | 2017-06-20 | 2017-06-20 | Power module power-on self-test method, device and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107219844A CN107219844A (en) | 2017-09-29 |
| CN107219844B true CN107219844B (en) | 2020-03-17 |
Family
ID=59950326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710474479.6A Active CN107219844B (en) | 2017-06-20 | 2017-06-20 | Power module power-on self-test method, device and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107219844B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655703B (en) * | 2018-12-30 | 2022-01-28 | 北京天诚同创电气有限公司 | Self-checking method, device and equipment for parallel power modules and storage medium |
| CN110108997A (en) * | 2019-04-09 | 2019-08-09 | 上海奇电电气科技股份有限公司 | A kind of frequency converter self checking method |
| CN110780142A (en) * | 2019-11-15 | 2020-02-11 | 广州仪速安电子科技有限公司 | Starting-up early warning method in instrument operation process |
| CN111707918B (en) * | 2020-06-22 | 2023-09-08 | 卧龙电气驱动集团股份有限公司 | Self-integrated driving detection method and device for motor control system for air conditioner fan |
| CN112034385B (en) * | 2020-08-05 | 2023-10-27 | 苏州汇川联合动力系统股份有限公司 | Motor system fault detection method, apparatus and computer readable storage medium |
| CN114421851B (en) * | 2021-11-26 | 2024-03-22 | 浙江宇视科技有限公司 | Detection method, device, equipment and medium for abnormal rotation of gate |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08308252A (en) * | 1995-05-11 | 1996-11-22 | Toshiba Corp | Power converter |
| CN102986116A (en) * | 2010-07-14 | 2013-03-20 | 株式会社丰田自动织机 | Rotating element with embedded permanent magnet and rotating electrical machine |
| CN103078526A (en) * | 2013-01-08 | 2013-05-01 | 广东志成冠军集团有限公司 | Current source type rectifier and grid-connected control method based on virtual resistor |
| CN103884930A (en) * | 2014-03-04 | 2014-06-25 | 王金全 | Full bridge uncontrolled rectifier fault diagnosis method based on insulation monitoring |
| CN104779584A (en) * | 2014-01-14 | 2015-07-15 | 易泰帝传动技术(烟台)有限公司 | Frequency changer detection protection circuit |
| CN105024622A (en) * | 2015-08-16 | 2015-11-04 | 石成富 | Intelligent control method of electrically-driven motor |
| CN106019056A (en) * | 2016-06-23 | 2016-10-12 | 华中科技大学 | Method for detecting three-phase rectifier power tube open circuit fault in real time |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4862527B2 (en) * | 2006-07-18 | 2012-01-25 | 三菱電機株式会社 | Semiconductor device |
| CN101078747A (en) * | 2007-06-29 | 2007-11-28 | 南京航空航天大学 | Double salient-pole motor drive power tube fault diagnosis method |
| CN101382585B (en) * | 2007-09-07 | 2011-01-26 | 比亚迪股份有限公司 | Test method, apparatus and generator for inverter in generator |
| CN100545669C (en) * | 2007-12-11 | 2009-09-30 | 天津大学 | The invertor operation state shows and fault on-line diagnosis circuit |
| CN104298221B (en) * | 2013-12-13 | 2017-07-07 | 郑州宇通客车股份有限公司 | Three phase full bridge on-off circuit fault detection method and device |
| CN103941114B (en) * | 2014-01-22 | 2019-01-18 | 上海大郡动力控制技术有限公司 | The self checking method of automobile permanent magnet synchronous motor system power module and current sensor |
| CN105021936B (en) * | 2014-04-25 | 2018-02-13 | 青岛海信日立空调系统有限公司 | A kind of method and electric equipment for detecting electrical leakage |
| CN104122479B (en) * | 2014-07-29 | 2017-04-19 | 华中科技大学 | Online detection method for open-circuit faults of power tubes of induction-motor vector control system |
-
2017
- 2017-06-20 CN CN201710474479.6A patent/CN107219844B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08308252A (en) * | 1995-05-11 | 1996-11-22 | Toshiba Corp | Power converter |
| CN102986116A (en) * | 2010-07-14 | 2013-03-20 | 株式会社丰田自动织机 | Rotating element with embedded permanent magnet and rotating electrical machine |
| CN103078526A (en) * | 2013-01-08 | 2013-05-01 | 广东志成冠军集团有限公司 | Current source type rectifier and grid-connected control method based on virtual resistor |
| CN104779584A (en) * | 2014-01-14 | 2015-07-15 | 易泰帝传动技术(烟台)有限公司 | Frequency changer detection protection circuit |
| CN103884930A (en) * | 2014-03-04 | 2014-06-25 | 王金全 | Full bridge uncontrolled rectifier fault diagnosis method based on insulation monitoring |
| CN105024622A (en) * | 2015-08-16 | 2015-11-04 | 石成富 | Intelligent control method of electrically-driven motor |
| CN106019056A (en) * | 2016-06-23 | 2016-10-12 | 华中科技大学 | Method for detecting three-phase rectifier power tube open circuit fault in real time |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107219844A (en) | 2017-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107219844B (en) | Power module power-on self-test method, device and storage medium | |
| CA2806317C (en) | Control apparatus for ac rotating machine | |
| US8816618B2 (en) | Rotary machine control apparatus | |
| US9219431B2 (en) | Motor control device | |
| US20180331645A1 (en) | Control apparatus for rotating electric machine | |
| CN107919827B (en) | Electric automobile and control method and device of driving motor of electric automobile | |
| CN108781047B (en) | Motor control device | |
| CN111090030A (en) | Open-circuit fault diagnosis method and device, motor controller and storage medium | |
| WO2021117303A1 (en) | Demagnetization diagnosis device for motor and demagnetization diagnosis method for motor control device | |
| US11368065B2 (en) | Controller of rotating electric machine | |
| US11329587B2 (en) | Motor driving apparatus, refrigeration cycle system, air conditioner, water heater, and refrigerator | |
| JP6776911B2 (en) | Synchronous motor controller | |
| JP6520799B2 (en) | Control device of rotating electric machine | |
| US10491144B2 (en) | Magnetic pole position detection device and motor control device | |
| JP2020068587A (en) | Control device for rotating electric machine | |
| JP6939693B2 (en) | Pulse pattern generator | |
| CN111742485B (en) | Motor control device | |
| CN111727555B (en) | Motor control device | |
| WO2023051141A1 (en) | Phase failure diagnosis method based on current instruction reconstruction and negative sequence current extraction | |
| US11342877B2 (en) | Controller of rotating electric machine | |
| JP6485821B1 (en) | Motor control device | |
| CN115598561A (en) | Detection method and module for multi-resistance sampling circuit, electric appliance and air conditioner | |
| JP6805675B2 (en) | Power converter | |
| JP2023077086A (en) | Motor controller | |
| JP2022153006A (en) | Motor control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |