CN211924440U - Dual-control system applied to air conditioner compressor - Google Patents
Dual-control system applied to air conditioner compressor Download PDFInfo
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- CN211924440U CN211924440U CN202020398954.3U CN202020398954U CN211924440U CN 211924440 U CN211924440 U CN 211924440U CN 202020398954 U CN202020398954 U CN 202020398954U CN 211924440 U CN211924440 U CN 211924440U
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Abstract
The dual control system applied to the air-conditioning compressor of the utility model adds the protection module which is communicated with the DSP control module, therefore, the protection module shares partial functions of the DSP control module, when the protection module receives the information that the voltage of the acquisition module is higher than a set value, the current is larger than the set value or the temperature is higher than the set value, the protection module controls the control module to be disconnected at the first time, the connection between the high-voltage direct current input end and the power module is cut off, and the DSP control module is informed to stop sending a driving signal to the power module, thereby stopping driving the air conditioner compressor until the acquisition module acquires the information lower than the set value, the protection module sends a signal to the control module, the high-voltage direct-current input end and the power module are conducted, and the work of the air conditioner compressor is recovered, so that dual-core protection is performed, and the control data volume of the single-core DSP is effectively reduced; after the air conditioner compressor is started, the real-time performance and the correctness of fault protection of the air conditioner compressor are effectively improved.
Description
Technical Field
The utility model relates to an air condition compressor's two control system.
Background
The electric automobile is an ideal choice for new energy automobiles due to energy conservation and environmental protection. The electric automobile adopts pure electric power supply, for the controller of the electric air-conditioning compressor of the automobile, the used voltage is generally a high-voltage direct-current power supply with hundreds of volts, the current of the compressor is generally ampere-level heavy current, the power circuit of the compressor is generally an IGBT/IPM power device, the heat productivity is large after long-time use, therefore, the overvoltage, overcurrent and overtemperature protection needs to be carried out on the electric air-conditioning compressor controller, the traditional single-core DSP control at present has the defects, such as processing overvoltage, overcurrent and overtemperature protection tasks, because the system resources of the single-core DSP are occupied by the control task of the compressor, the protection program can not respond in time, the over-current, over-voltage and over-temperature faults of the air conditioner compressor system can be caused, and the circuit and the compressor can be damaged in serious cases, therefore, the system for controlling the air conditioner compressor by the single-core DSP has certain limitation, and the power circuit of the air conditioner compressor cannot be safely and reliably protected.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an aim at solving among the prior art electric air condition compressor and mainly rely on the mononuclear DSP to handle the excessive pressure and overflow and lead to corresponding problem that can not be timely, this technical scheme provides a dual control protection system.
In order to achieve the purpose, the technical scheme is as follows:
be applied to air condition compressor's dual control system, including protection module, DSP control module, collection module, control module and power module, DSP control module respectively with power module and collection module connects, DSP control module still with protection module connects, protection module pass through control module with power module connects, protection module still with collection module connects, wherein:
the DSP control module: the protection module is used for receiving an external start/stop signal and a collection signal of the collection module so as to drive the power module to work and communicate with the protection module;
a protection module: the power module is used for receiving acquisition signals of the DSP control module and the acquisition module so as to drive the power module to work;
a control module: the protection module is used for receiving a protection module signal so as to be conducted between the power module and the high-voltage direct-current input end;
a power module: receiving a DSP control module or a protection module to drive an air conditioner compressor to work;
an acquisition module: the bus temperature monitoring device is used for collecting bus voltage, bus current and temperature and sending the bus voltage, the bus current and the temperature to the DSP control module or the protection module.
In order to realize the double control function, the double control system applied to the air condition compressor of the utility model adds the protection module which is communicated with the DSP control module, therefore, the protection module shares partial functions of the DSP control module, when the protection module receives the information that the voltage of the acquisition module is higher than a set value, the current is larger than the set value or the temperature is higher than the set value, the protection module controls the control module to be disconnected at the first time, the connection between the high-voltage direct current input end and the power module is cut off, and the DSP control module is informed to stop sending a driving signal to the power module, thereby stopping driving the air conditioner compressor until the acquisition module acquires the information lower than the set value, the protection module sends a signal to the control module, the high-voltage direct-current input end and the power module are conducted, and the work of the air conditioner compressor is recovered, so that dual-core protection is performed, and the control data volume of the single-core DSP is effectively reduced; after the air conditioner compressor is started, the real-time performance and the correctness of fault protection of the air conditioner compressor are effectively improved.
In order to enable the protection module and the DSP module to communicate, the protection module and the DSP control module communicate through an SCI (serial interface protocol).
In order to enable the protection module to acquire the voltage information, the acquisition module comprises an overvoltage acquisition module which is arranged on the power module and used for feeding back the bus voltage information to the protection module or the DSP control module.
In order to enable the protection module to acquire the current information, the acquisition module further comprises an overcurrent acquisition module which is arranged on the power module and used for feeding the bus current information back to the protection module or the DSP control module.
In order to enable the protection module to acquire the temperature information, the acquisition module further comprises a temperature acquisition module used for feeding back the bus temperature information to the protection module or the DSP control module.
In order to enable the protection module to acquire the three-phase current information of the motor, the acquisition module further comprises a three-phase current acquisition module which is arranged on the air conditioner compressor and used for detecting the three-phase current of the motor and feeding the three-phase current back to the protection module or the DSP control module.
In order to enable the DSP control module to obtain start/stop signals, the DSP control module is also provided with a communication unit which adopts a CAN communication protocol to communicate with the outside.
In order to adapt to the power supply grade, the control module is a relay, an MOS (metal oxide semiconductor) tube or a triode.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a first schematic structural diagram of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
When embodiments of the present invention refer to the ordinal numbers "first", "second", etc., it should be understood that the terms are used for distinguishing only when they do express the ordinal order in context.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Please refer to fig. 1, the utility model provides a be applied to air condition compressor's dual control system, including protection module 20, DSP control module 21, collection module, control module 13 and power module 11, DSP control module 21 respectively with power module 11 and collection module connects, DSP control module 21 still with protection module 20 connects, protection module 20 pass through control module 13 with power module 11 connects, protection module 20 still with collection module connects, wherein:
the DSP control module 21: the protection module is used for receiving an external start/stop signal and a collection signal of the collection module so as to drive the power module 11 to work and communicate with the protection module 20;
the protection module 20: the power module is used for receiving the acquisition signals of the DSP control module 21 and the acquisition module so as to drive the power module 11 to work;
the control module 13: the protection module 20 is used for receiving a signal of the protection module 20 to conduct between the power module 11 and the high-voltage direct current input end 40;
the power module 11: receiving the DSP control module 21 or the protection module 20 to drive the air-conditioning compressor 80 to work;
an acquisition module: the bus voltage, the bus current and the temperature are collected and sent to the DSP control module 21.
In order to realize the double control function, the double control system applied to the air condition compressor of the utility model adds the protection module which is communicated with the DSP control module, therefore, the protection module shares partial functions of the DSP control module, when the protection module receives the information that the voltage of the acquisition module is higher than a set value, the current is larger than the set value or the temperature is higher than the set value, the protection module controls the control module to be disconnected at the first time, the connection between the high-voltage direct current input end and the power module is cut off, and the DSP control module is informed to stop sending a driving signal to the power module, thereby stopping driving the air conditioner compressor until the acquisition module acquires the information lower than the set value, the protection module sends a signal to the control module, the high-voltage direct-current input end and the power module are conducted, and the work of the air conditioner compressor is recovered, so that dual-core protection is performed, and the control data volume of the single-core DSP is effectively reduced; after the air conditioner compressor is started, the real-time performance and the correctness of fault protection of the air conditioner compressor are effectively improved.
Preferably, the power module adopts an IGBT module AIKW30N60CT, the IGBT module receives six paths of PWM signals output by the DSP control module to complete voltage inversion, and the six paths of PWM signals are supplied to a three-phase winding of the electric air-conditioning compressor to realize the frequency conversion control of the electric compressor.
In order to enable the protection module to communicate with the DSP module, the protection module 20 communicates with the DSP control module 21 through the SCI serial interface protocol, and the communication mode only needs one line, thereby reducing the production cost.
In order to enable the protection module to obtain voltage information and current information, the acquisition module comprises an overvoltage acquisition module 14 which is arranged on the power module 11 and used for feeding back bus voltage information to the protection module 20, the overvoltage acquisition module 14 and the overcurrent acquisition module 23 send voltage signals and current signals acquired by a bus to the protection module for analysis, if the bus voltage or the bus current is higher than the highest limit voltage or current, the protection module firstly controls the control module to be disconnected at the first time, the connection between the high-voltage direct-current input end and the power module is cut off, and the DSP control module is informed to stop sending driving signals to the power module through SCI serial port communication; if the bus voltage or current is in the highest limit voltage or current and data fluctuates or the working range is unexpected, the protection module keeps the control module connected and informs the DSP control module to stop sending a driving signal to the power module through SCI serial port communication, and double-CPU control protection is achieved.
Preferably, the operational amplifier of the overcurrent collection module is MC33274, the comparator is LM2903 of the semiconductor, the current signal is amplified by the operational amplifier and then compared with the comparator, the comparison signal is sent to the protection module, the current signal of the protection module is analyzed and processed to judge whether the bus current is within the highest limit current, and the DSP control module is informed to control the operation or protection of the compressor through SCI serial port communication.
In order to enable the protection module to obtain temperature information, the acquisition module further comprises a temperature acquisition module 25 attached to the bus and used for feeding the bus temperature information back to the protection module 20 or the DSP control module 21, the temperature acquisition module is a temperature sensor which converts a temperature signal inside the controller into a resistance signal, the resistance signal is converted into a voltage signal through a circuit and then is sent to the protection module, the protection module transmits temperature data to the DSP control module through SCI serial communication, and the DSP control module changes a duty ratio according to the temperature inside the controller and controls the compressor to operate at a reduced speed or directly perform shutdown protection.
In order to enable the protection module to acquire the three-phase current information of the motor, the acquisition module further comprises a three-phase current acquisition module 24 which is arranged on the air conditioner compressor 80 and used for detecting the three-phase current of the motor and feeding the three-phase current back to the protection module 20 or the DSP control module 21, so that the three-phase current information of the motor is detected and prevented from being damaged.
In order to enable the DSP control module to obtain a start/stop signal, a communication unit 22 adopting a CAN communication protocol and external communication is further arranged on the DSP control module 21, a CAN communication mode is adopted for the communication unit and the whole vehicle, the CAN module adopts TJA1040, and after the air conditioner ECU receives a start/stop signal start command, a start working signal is sent to the compressor controller by outputting a high level to control the variable frequency work of the air conditioner compressor. The air conditioner compressor controller CAN report the rotating speed, the running state, the fault reason and the like of the compressor through CAN communication, and the bidirectional communication between the controller and the whole vehicle is completed.
In order to adapt to the power supply grade, the control module 13 is a relay, the selected relay switch can be correspondingly selected according to the voltage grade of the control power supply, and the purpose of controlling the relay switch 13 can be achieved by boosting the control voltage through the voltage doubling circuit.
Preferably, the LT3746 is adopted as the power chip of the auxiliary power supply 12, and the control power input by the control power input terminal 50 can be converted into +15V required by the power module 11, and +5V, +3.3V required by the overvoltage acquisition module 14, the overcurrent acquisition module 23, the DSP control module 21, the protection module 20, the communication unit 22, and the temperature acquisition module 25. The high-voltage direct current input end 40 and the control power input end 50 are obtained from different power inputs to play a role in isolation, so that when a direct current high-voltage input source fails, the auxiliary power supply 12, the protection module 20, the relay switch 13, the overvoltage acquisition module 14, the overcurrent acquisition module 23, the DSP control module 21, the communication unit 22 and the temperature acquisition module 25 can operate reliably, and the reliability of the air conditioner compressor controller is improved.
Preferably, the protection module is an MCU in implementation mode and is in a model of a DSP28035, and a PWM pin of the protection module is connected to the temperature sensor, the overvoltage acquisition module, and the overcurrent acquisition module respectively to acquire temperature, voltage, and current information for processing.
The utility model has the advantages that:
the dual control system applied to the air-conditioning compressor of the utility model adds the protection module which is communicated with the DSP control module, therefore, the protection module shares partial functions of the DSP control module, when the protection module receives the information that the voltage of the acquisition module is higher than a set value, the current is larger than the set value or the temperature is higher than the set value, the protection module controls the control module to be disconnected at the first time, the connection between the high-voltage direct current input end and the power module is cut off, and the DSP control module is informed to stop sending a driving signal to the power module, thereby stopping driving the air conditioner compressor until the acquisition module acquires the information lower than the set value, the protection module sends a signal to the control module, the high-voltage direct-current input end and the power module are conducted, and the work of the air conditioner compressor is recovered, so that dual-core protection is performed, and the control data volume of the single-core DSP is effectively reduced; after the air conditioner compressor is started, the real-time performance and the correctness of fault protection of the air conditioner compressor are effectively improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not intended to limit the scope of the present application, which is within the scope of the present application, except that the same or similar principles and basic structures as the present application may be used.
Claims (9)
1. Double control system for air condition compressor, its characterized in that: including protection module (20), DSP control module (21), collection module, control module (13) and power module (11), DSP control module (21) respectively with power module (11) and collection module connects, DSP control module (21) still with protection module (20) are connected, protection module (20) pass through control module (13) with power module (11) are connected, protection module (20) still with collection module connects, wherein:
DSP control module (21): the protection device is used for receiving an external start/stop signal and a collection signal of the collection module so as to drive the power module (11) to work and communicate with the protection module (20);
protection module (20): the power module is used for receiving acquisition signals of the DSP control module (21) and the acquisition module so as to indirectly drive the power module (11) to work;
control module (13): the protection circuit is used for receiving a signal of the protection module (20) so as to be conducted between the power module (11) and the high-voltage direct current input end (40);
power module (11): receiving a signal of the DSP control module (21) or the protection module (20) to drive the air-conditioning compressor (80) to work;
an acquisition module: the bus temperature monitoring device is used for collecting bus voltage, bus current and temperature and sending the bus voltage, the bus current and the temperature to the DSP control module (21) or the protection module (20).
2. The dual control system for an air conditioner compressor as claimed in claim 1, wherein: the protection module (20) and the DSP control module (21) communicate through an SCI (serial interface) protocol.
3. The dual control system for an air conditioner compressor as claimed in claim 2, wherein: the collection module comprises an overvoltage collection module (14) which is arranged on the power module (11) and used for feeding bus voltage information back to the protection module (20) or the DSP control module (21).
4. The dual control system for an air conditioner compressor as claimed in claim 3, wherein: the acquisition module also comprises an overcurrent acquisition module (23) which is arranged on the power module (11) and used for feeding bus current information back to the protection module (20) or the DSP control module (21).
5. The dual control system applied to an air conditioner compressor as claimed in claim 4, wherein: the collection module further comprises a temperature collection module (25) used for feeding bus temperature information back to the protection module (20) or the DSP control module (21).
6. The dual control system for an air conditioner compressor as claimed in claim 5, wherein: the acquisition module also comprises a three-phase current acquisition module (24) which is arranged on the air conditioner compressor (80) and used for detecting the three-phase current of the motor and feeding the three-phase current back to the protection module (20) or the DSP control module (21).
7. The dual control system for an air conditioner compressor as claimed in claim 1, wherein: and the DSP control module (21) is also provided with a communication unit (22) which adopts a CAN communication protocol to communicate with the outside.
8. The dual control system for an air conditioner compressor as claimed in claim 7, wherein: the control module (13) is a relay, an MOS tube or a triode.
9. The dual control system for an air conditioner compressor as claimed in claim 1, wherein: the protection module is an MCU.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020398954.3U CN211924440U (en) | 2020-03-26 | 2020-03-26 | Dual-control system applied to air conditioner compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020398954.3U CN211924440U (en) | 2020-03-26 | 2020-03-26 | Dual-control system applied to air conditioner compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027741A (en) * | 2021-03-11 | 2021-06-25 | 浙江大学 | Intelligent programmable axial plunger pump controller and control method |
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2020
- 2020-03-26 CN CN202020398954.3U patent/CN211924440U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027741A (en) * | 2021-03-11 | 2021-06-25 | 浙江大学 | Intelligent programmable axial plunger pump controller and control method |
| CN113027741B (en) * | 2021-03-11 | 2022-05-17 | 浙江大学 | Intelligent programmable axial plunger pump controller and control method |
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