CN104779882A - Logic protection circuit and motor controller - Google Patents
Logic protection circuit and motor controller Download PDFInfo
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- CN104779882A CN104779882A CN201510193304.9A CN201510193304A CN104779882A CN 104779882 A CN104779882 A CN 104779882A CN 201510193304 A CN201510193304 A CN 201510193304A CN 104779882 A CN104779882 A CN 104779882A
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Abstract
The invention provides a logic protection circuit, and belongs to the field of protection circuits of hardware. The logic protection circuit comprises an MCU system, an and gate circuit, a latching circuit and a fault clearing circuit, wherein the input end of the MCU system is connected with the output end of the latching circuit, and the output end of the MCU system is connected with the input end of the fault clearing circuit; the input end of the latching circuit is connected with the output end of the and gate circuit and the output end of the fault clearing circuit respectively; the MCU system is used for controlling and outputting a PWM signal and determining whether a fault clearing signal is transmitted or not, so that the function of the latching circuit is recovered. The logic protection circuit disclosed by the invention is simple in circuits, rapid in reaction to a fault signal, safe and reliable, electronic components are reduced, and the cost is reduced.
Description
Technical field
The present invention relates to hardware protection circuit field, particularly relate to a kind of virtual protection circuit.
Background technology
New forms of energy vehicle day, benefit received the concern of people, and wherein fail safe is that emphasis needs to consider, and can electric-powered parts be as the kernel component of new-energy automobile, run into abnormal conditions and identify fast and the fail safe of whole new forms of energy car of dealing with relationship.
In the mair motor controller field of new energy vehicle, generally all need the software and hardware Preservation tactics of various detection signal, a lot of method of software or hardware that all adopts realizes now.
Existing software protection reaction speed is slow, runs into emergency situations, because process may cause potential safety hazard not in time, and existing hardware protective circuit too complex.
Summary of the invention
For solving problems of the prior art, the invention provides a kind of virtual protection circuit.
The present invention includes MCU system, AND circuit, latch cicuit and fault clearance circuit, described MCU system input is connected with described latch cicuit output, described MCU system output is connected with described fault clearance circuit input end, described latch cicuit input is connected with described fault clearance circuit output end with described AND circuit output respectively, described MCU Systematical control output pwm signal also determines whether to provide fault clearance signal, recovers described latch cicuit function.
The present invention is further improved, and described virtual protection circuit also comprises signal input and the modulate circuit of inverted signal, and described signal input is connected with the input of described AND circuit with described MCU system respectively with the output of modulate circuit.
The present invention is further improved, and described signal comprises current analog signal, temperature analog signal, voltage analog signal, PRND gear information, enable signal and IGBT fault-signal.
The present invention is further improved, described current analog signal comprises A phase current analog signal, B phase current analog signal, C phase current analog signal and bus current analog signal, and described temperature analog signal comprises A phase IGBT temperature analog signal, B phase IGBT temperature analog signal, C phase IGBT temperature analog signal, motor winding 1 temperature analog signal, motor winding 2 temperature analog signal and radiator temperature analog signal.
The present invention is further improved, and described AND circuit is made up of one or more two input logics and door chip, and described two input logics are connected with signal output part with door chip input.
The present invention is further improved, and described latch cicuit is DS latch logic chip or triode for keeping logical signal state.
The present invention also provides a kind of electric machine controller comprising above-mentioned virtual protection circuit; comprise pwm signal isolation interlock circuit, control loop, drive circuit and major loop; described MCU Systematical control output pwm signal; described pwm signal isolation interlock circuit is used for isolation and the interlocking of pwm signal; described control loop is used for controlling the transmission of pwm signal; described drive circuit is used for drive motors; described major loop controls the running of motor, and output and the described pwm signal of described latch cicuit are isolated interlock circuit input and be connected.
The present invention is further improved, described pwm signal isolation interlock circuit, comprise the bridge arm circuit that three-phase structure is identical, wherein, every bar bridge arm circuit comprises upper and lower two bridge drive circuits, described drive circuit comprises the first drive circuit: for driving photoelectric coupled device, photoelectric coupled device: the isolation for pwm signal interlocks, second drive circuit: for driving rear class drive amplification circuit, described first drive circuit is connected with the input of described photoelectric coupled device, and described second drive circuit is connected with the output of described photoelectric coupled device.
The present invention is further improved, and described AND circuit provides fault logic signals, and described latch cicuit keeps fault logic signals, outputs to described pwm signal isolation interlock circuit, by locked for pwm signal hardware corridor, and cannot output pwm signal.
Compared with prior art, the invention has the beneficial effects as follows: circuit is simple, is swift in response to fault-signal, safe and reliable, save electronic devices and components, reduce costs.
Accompanying drawing explanation
Fig. 1 is motor controller structure schematic diagram of the present invention;
Fig. 2 is virtual protection circuit function topological diagram of the present invention;
Fig. 3 is virtual protection electrical block diagram of the present invention;
Fig. 4 is current analog signal virtual protection electrical block diagram of the present invention;
Fig. 5 is temperature analog signal virtual protection electrical block diagram of the present invention;
Fig. 6 is bus overvoltage of the present invention under-voltage signal logic protective circuit structural representation;
Fig. 7 is PRND gear information enable signal virtual protection electrical block diagram of the present invention;
Fig. 8 is IGBT fault-signal virtual protection electrical block diagram of the present invention;
Fig. 9 is software protection circuit structure diagram of the present invention;
Figure 10 is signal of the present invention input and modulate circuit structure chart;
Figure 11 is virtual protection circuit structure diagram of the present invention;
Figure 12 is Figure 11 virtual protection circuit enlarged drawing;
Figure 13 is Figure 11 fault clearance circuit enlarged drawing.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further details.
As shown in Figure 2, extraneous various signals, comprise current analog signal, temperature analog signal, voltage analog signal, PRND gear information enable signal and IGBT fault-signal etc., wherein said current analog signal comprises A phase current analog signal, B phase current analog signal, C phase current analog signal and bus current analog signal, described temperature analog signal comprises A phase IGBT temperature analog signal, B phase IGBT temperature analog signal, C phase IGBT temperature analog signal, motor winding 1 temperature analog signal, motor winding 2 temperature analog signal and radiator temperature analog signal, inputted and modulate circuit by signal, after analog circuit and digital circuit, the signal on its every road is divided into two tunnels, the first via directly enters the process of MCU system, virtual protection circuit of the present invention is entered on another road.
The signal that the first via entered analog circuit directly enters the process of MCU system, realizes software protection, and it realizes principle and is:
Enter the process of MCU system, its detailed process is the signal that the signal in external world conversion MCU can be identified, participates in calculating or the software protection of electric machine controller; After reaching software protection set-point, corresponding protection and measure will be provided.As shown in Fig. 9 software protection circuit structure diagram, realize the software protection of electric machine controller.
Another road is converted into digital signal through the signal of digital circuit and enters virtual protection circuit; carry out hardware protection and control; go to control pwm signal isolation interlock circuit; make the hardware corridor of its pwm signal locked by fault-signal; after must needing hardware signal and trouble shooting, the hardware corridor of pwm signal just arouses lower again unblock at software and enables.In electric machine controller protection field; in order to safe and reliable protection; except software function protection; also do hardware latch up protection especially; particularly electric current, temperature, deficient overvoltage, gear, IGBT fault-signal; in other words, after these fault-signals occur, we must the hardware driving passage of closing controller.And the reaction time of hardware protection functional circuit is far away faster than software protection function.
Wherein the transfer ratio of IGBT fault-signal is more special, and two paths of signals is exported by the Q pin of latch and the non-pin output of Q, and both them, logically face is reciprocal; One tunnel is transferred to the Enable Pin of pwm signal isolation interlock circuit, locked for pwm signal circuit, does not allow signal export; A road in addition enters MCU system, does judgement and the control of software.
As shown in Figure 3; virtual protection circuit of the present invention comprises MCU system, AND circuit, latch cicuit and fault clearance circuit; described MCU system input is connected with described latch cicuit output; described MCU system output is connected with described fault clearance circuit input end; described latch cicuit input is connected with described fault clearance circuit output end with described AND circuit output respectively; described MCU Systematical control output pwm signal also determines whether to provide fault clearance signal, recovers described latch cicuit function.
Various signal logic defencive function specific implementation principle is as follows:
As shown in Figure 4, the virtual protection circuit of current signal, is made up of the input logic of current signal and door chip, latch chip, fault removing circuit, pwm signal latch cicuit and MCU system.
The A of electric machine controller inside, B, 4 road current analog signals of the current Hall detection of C three-phase and DC bus, after digital circuit, transfer the logic level (low level represents overcurrent protection) of height to, 4 road logic level signals are input to logical AND gate chip respectively and process, provide a fault level (low level represents overcurrent protection), then by DS latch, fault-signal logic is kept, be given to pwm signal isolation interlock circuit, locked for the hardware corridor of pwm signal, cannot output pwm signal, thus reach the functional effect of protection.
In the process of above-mentioned process, overcurrent fault logic is given to MCU system, according to circumstances determined whether providing fault clearance signal to fault clearance circuit by MCU system, recover the function of latch, the hardware capability of recovery and enable pwm signal isolation interlock circuit.
As shown in Figure 5, the hardware logic protective circuit of temperature signal, is made up of the input logic of each temperature signal and door chip, latch chip, fault removing circuit, pwm signal latch cicuit and MCU system.
The IGBT temperature analog signal of the ABC three-phase bridge wall of electric machine controller inside, external motor winding 1 and 2 temperature analog signal and Inner heat sink temperature analog signal, after digital circuit, transfer the logic level (low level represents overheat protector) of height to, 6 road logic level signals are input to logical AND gate chip respectively and process, provide a fault level (low level represents overheat protector), then by DS latch, fault-signal logic is kept, be given to pwm signal isolation interlock circuit, locked for the hardware corridor of pwm signal, cannot output pwm signal, thus reach the function of protection.
In the process of above-mentioned process, fault logic is given to MCU system, is according to circumstances determined whether providing fault clearance signal to fault clearance circuit by MCU system, recovers the function of latch, the hardware capability of recovery and enable pwm signal isolation interlock circuit.
As shown in Figure 6, the hardware logic protective circuit of bus voltage signal, is made up of the input logic of the under-voltage overvoltage signal of bus and door chip, latch chip, fault removing circuit, pwm signal latch cicuit and MCU system.
The busbar voltage sampled signal of electric machine controller inside; after digital circuit; transfer the logic level (low level represents the under-voltage or overvoltage protection of busbar voltage) of height to; 2 road logic level signals are input to logical AND gate chip respectively and process; provide a fault level (low level represents busbar voltage fault); then by DS latch, fault-signal logic is kept; be given to pwm signal isolation interlock circuit; locked for the hardware corridor of pwm signal; cannot output pwm signal, thus reach the function of protection.
In the process of above-mentioned process, fault logic is given to MCU system, is according to circumstances determined whether providing fault clearance signal to fault clearance circuit by MCU system, recovers the function of latch, the hardware capability of recovery and enable pwm signal isolation interlock circuit.
As shown in Figure 7, the hardware logic protective circuit of gear signal, is made up of the input logic of driving switch signal and door chip, latch chip, fault removing circuit, pwm signal latch cicuit and MCU system.
The gear signal of electric machine controller outside; after digital circuit; transfer the logic level (low level represents that gear consumption fault is effective) of height to; 2 road logic level signals are input to logical AND gate chip respectively and process; provide a fault level (low level represents gear fault-signal); then by DS latch, fault-signal logic is kept; be given to pwm signal isolation interlock circuit; locked for the hardware corridor of pwm signal; cannot output pwm signal, thus reach the function of protection.
In the process of above-mentioned process, fault logic is given to MCU system, is according to circumstances determined whether providing fault clearance signal to fault clearance circuit by MCU system, recovers the function of latch, the hardware capability of recovery and enable pwm signal isolation interlock circuit.
As shown in Figure 8, the hardware logic protective circuit of IGBT fault, is made up of the input logic of IGBT fault-signal and door chip, latch chip, fault removing circuit, pwm signal latch cicuit and MCU system.
The IGBT fault-signal of electric machine controller inside; after digital circuit; transfer the logic level (low level represents IGBT fault) of height to; 2 road logic level signals are input to logical AND gate chip respectively and process; provide a fault level (low level represents gear fault-signal); then by DS latch, fault-signal logic is kept; be given to pwm signal isolation interlock circuit; locked for the hardware corridor of pwm signal; cannot output pwm signal, thus reach the functional effect of protection.
In the process of above-mentioned process, IGBT fault logic signals is given to the interrupt system of MCU system, stops other working procedures immediately by MCU, performs IGBT interrupt service routine, turns off the pwm signal unit of MCU system; According to circumstances determine whether providing fault clearance signal to fault clearance circuit simultaneously, recover the function of latch, the hardware capability of recovery and enable pwm signal isolation interlock circuit.
In above-described embodiment, described AND circuit is made up of one or more two input logics and door chip, and described two input logics are connected with signal output part with door chip input.
Described latch cicuit, except DS latch logic chip, also can be the electronic devices and components for keeping logical signal state such as triode.
As shown in Figure 1, present invention also offers a kind of electric machine controller, except comprising above-mentioned virtual protection circuit, also comprise pwm signal isolation interlock circuit, control loop, drive circuit and major loop, described MCU system also controls output pwm signal, described pwm signal isolation interlock circuit is used for isolation and the interlocking of pwm signal, described control loop is used for controlling the transmission of pwm signal, described drive circuit is used for drive motors, described major loop controls the running of motor, output and the described pwm signal of described latch cicuit are isolated interlock circuit input and are connected.
Described pwm signal isolation interlock circuit, comprise the bridge arm circuit that three-phase structure is identical, wherein, every bar bridge arm circuit comprises upper and lower two bridge drive circuits, described drive circuit comprises the first drive circuit: for driving photoelectric coupled device, photoelectric coupled device: the isolation for pwm signal interlocks, second drive circuit: for driving rear class drive amplification circuit, described first drive circuit is connected with the input of described photoelectric coupled device, and described second drive circuit is connected with the output of described photoelectric coupled device.
Described AND circuit provides fault logic signals, and described latch cicuit keeps fault logic signals, outputs to described pwm signal isolation interlock circuit, by locked for pwm signal hardware corridor, cannot output pwm signal, thus play hardware protection function.
Described control loop comprises power control circuit, signal input interface circuit and CAN communication circuit.Described drive circuit comprises drive amplification circuit and switching power circuit, and described drive amplification circuit comprises A phase drive amplification circuit, B phase drive amplification circuit and C phase drive amplification circuit.Described major loop comprises IGBT inverter bridge, energy storage Absorption Capacitance, various electric, the structural member of stack bus bar and structural member etc.
The motor that major loop connects is exactly the load of electric machine controller, is the object that electric machine controller drives.
Special instruction; Fig. 1 just gives the main circuit topology figure of the pwm signal passage of electric machine controller and the virtual protection function diagram of other signals; in electric machine controller, also have other functional block diagrams a lot of not provide, other functional block diagrams are emphasis improvements of the present invention not.
The embodiment of the above is better embodiment of the present invention; not limit specific embodiment of the invention scope with this; scope of the present invention comprises and is not limited to this embodiment, and all equivalence changes done according to the present invention are all in protection scope of the present invention.
Claims (10)
1. a virtual protection circuit; it is characterized in that: comprise MCU system, AND circuit, latch cicuit and fault clearance circuit; described MCU system input is connected with described latch cicuit output; described MCU system output is connected with described fault clearance circuit input end; described latch cicuit input is connected with described fault clearance circuit output end with described AND circuit output respectively; described MCU Systematical control output pwm signal also determines whether to provide fault clearance signal, recovers described latch cicuit function.
2. a kind of virtual protection circuit according to claim 1; it is characterized in that: described virtual protection circuit also comprises signal input and the modulate circuit of inverted signal, and described signal input is connected with the input of described AND circuit with described MCU system respectively with the output of modulate circuit.
3. a kind of virtual protection circuit according to claim 2, is characterized in that: described signal comprises current analog signal, temperature analog signal, voltage analog signal, PRND gear information enable signal and IGBT fault-signal.
4. a kind of virtual protection circuit according to claim 3, is characterized in that: described current analog signal comprises A phase current analog signal, B phase current analog signal, C phase current analog signal and bus current analog signal.
5. a kind of virtual protection circuit according to claim 3, is characterized in that: described temperature analog signal comprises A phase IGBT temperature analog signal, B phase IGBT temperature analog signal, C phase IGBT temperature analog signal, motor winding 1 temperature analog signal, motor winding 2 temperature analog signal and radiator temperature analog signal.
6. a kind of virtual protection circuit according to claim 1 and 2, it is characterized in that: described AND circuit is made up of one or more two input logics and door chip, described two input logics are connected with signal output part with door chip input.
7. a kind of virtual protection circuit according to claim 1 and 2, is characterized in that: described latch cicuit is DS latch logic chip or triode for keeping logical signal state.
8. the electric machine controller containing virtual protection circuit described in any one of claim 1-7; it is characterized in that: also comprise pwm signal isolation interlock circuit, control loop, drive circuit and major loop; described MCU Systematical control output pwm signal; described pwm signal isolation interlock circuit is used for isolation and the interlocking of pwm signal; described control loop is used for controlling the transmission of pwm signal; described drive circuit is used for drive motors; described major loop controls the running of motor, and output and the described pwm signal of described latch cicuit are isolated interlock circuit input and be connected.
9. electric machine controller according to claim 8, it is characterized in that: described pwm signal isolation interlock circuit, comprise the bridge arm circuit that three-phase structure is identical, wherein, every bar bridge arm circuit comprises upper and lower two bridge drive circuits, described drive circuit comprises the first drive circuit: for driving photoelectric coupled device, photoelectric coupled device: the isolation for pwm signal interlocks, second drive circuit: for driving rear class drive amplification circuit, described first drive circuit is connected with the input of described photoelectric coupled device, described second drive circuit is connected with the output of described photoelectric coupled device.
10. electric machine controller according to claim 8, it is characterized in that: described AND circuit provides fault logic signals, described latch cicuit keeps fault logic signals, outputs to described pwm signal isolation interlock circuit, by locked for pwm signal hardware corridor, cannot output pwm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510193304.9A CN104779882A (en) | 2015-04-22 | 2015-04-22 | Logic protection circuit and motor controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510193304.9A CN104779882A (en) | 2015-04-22 | 2015-04-22 | Logic protection circuit and motor controller |
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| CN104779882A true CN104779882A (en) | 2015-07-15 |
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| CN201510193304.9A Pending CN104779882A (en) | 2015-04-22 | 2015-04-22 | Logic protection circuit and motor controller |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105892369A (en) * | 2016-05-24 | 2016-08-24 | 天津平高智能电气有限公司 | Integrated three-position switch control circuit |
| CN106385249A (en) * | 2016-08-26 | 2017-02-08 | 王文杰 | PWM control signal self-locking protection circuit of electric automobile motor controller |
| CN107482590A (en) * | 2017-10-12 | 2017-12-15 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of driving of IGBT module and fault secure circuit |
| CN108565839A (en) * | 2018-03-08 | 2018-09-21 | 精进电动科技股份有限公司 | A kind of IGBT drive circuit and electric machine controller of electric machine controller |
| CN110365258A (en) * | 2019-07-30 | 2019-10-22 | 杭州晴川科技有限公司 | A kind of controlling and driving circuits |
| CN112046289A (en) * | 2020-08-24 | 2020-12-08 | 奇瑞新能源汽车股份有限公司 | Electric vehicle, drive control system thereof and fault detection control method |
| CN112272021A (en) * | 2020-11-05 | 2021-01-26 | 中国航空工业集团公司西安航空计算技术研究所 | Fault latch circuit for stability of elevator-mounted computer |
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| US5642247A (en) * | 1995-07-21 | 1997-06-24 | Harris Corporation | Automatic fault monitoring system and motor control system incorporating same |
| CN102486131A (en) * | 2010-12-06 | 2012-06-06 | 联创汽车电子有限公司 | Driving diagnosis and protection circuit for fuel injector |
| CN104333293A (en) * | 2014-11-20 | 2015-02-04 | 奇瑞汽车股份有限公司 | Electric car motor controller |
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| US5642247A (en) * | 1995-07-21 | 1997-06-24 | Harris Corporation | Automatic fault monitoring system and motor control system incorporating same |
| CN102486131A (en) * | 2010-12-06 | 2012-06-06 | 联创汽车电子有限公司 | Driving diagnosis and protection circuit for fuel injector |
| CN104333293A (en) * | 2014-11-20 | 2015-02-04 | 奇瑞汽车股份有限公司 | Electric car motor controller |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105892369A (en) * | 2016-05-24 | 2016-08-24 | 天津平高智能电气有限公司 | Integrated three-position switch control circuit |
| CN106385249A (en) * | 2016-08-26 | 2017-02-08 | 王文杰 | PWM control signal self-locking protection circuit of electric automobile motor controller |
| CN107482590A (en) * | 2017-10-12 | 2017-12-15 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of driving of IGBT module and fault secure circuit |
| CN108565839A (en) * | 2018-03-08 | 2018-09-21 | 精进电动科技股份有限公司 | A kind of IGBT drive circuit and electric machine controller of electric machine controller |
| CN110365258A (en) * | 2019-07-30 | 2019-10-22 | 杭州晴川科技有限公司 | A kind of controlling and driving circuits |
| CN110365258B (en) * | 2019-07-30 | 2024-04-16 | 杭州晴川科技有限公司 | Control and drive circuit |
| CN112046289A (en) * | 2020-08-24 | 2020-12-08 | 奇瑞新能源汽车股份有限公司 | Electric vehicle, drive control system thereof and fault detection control method |
| CN112046289B (en) * | 2020-08-24 | 2022-04-12 | 奇瑞新能源汽车股份有限公司 | Electric vehicle, drive control system thereof and fault detection control method |
| CN112272021A (en) * | 2020-11-05 | 2021-01-26 | 中国航空工业集团公司西安航空计算技术研究所 | Fault latch circuit for stability of elevator-mounted computer |
| CN112272021B (en) * | 2020-11-05 | 2023-12-22 | 中国航空工业集团公司西安航空计算技术研究所 | Fault latch circuit for improving stability of onboard computer |
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