CN101227164A - Direct current compressor drive circuit - Google Patents
Direct current compressor drive circuit Download PDFInfo
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- CN101227164A CN101227164A CNA2007101147732A CN200710114773A CN101227164A CN 101227164 A CN101227164 A CN 101227164A CN A2007101147732 A CNA2007101147732 A CN A2007101147732A CN 200710114773 A CN200710114773 A CN 200710114773A CN 101227164 A CN101227164 A CN 101227164A
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Abstract
The invention discloses a direct current compressor driving circuit, which comprises an MCU and an inversing circuit, wherein the inversing circuit comprises two groups of controlling signal ends which are six paths, namely three-phase direct current positive pole ends Up, Vp, Wp and three-phase direct current negative pole ends Un, Vn, Wn, the MCU comprise at least two paths of PWM output end mouths, at least one way of PWM output end mouth is connected with a multi-channel selective circuit, the PWM output end mouth which carries out multipath expansion is correspondingly connected with the corresponding controlling signal end of the inversing circuit, and a gating controlling end of the multi-channel selective circuit is used to receive channel selective signals which are output by the MCU. The PWM output end mouth of the MCU chip carries out the multipath expansion through designing an end mouth expanding circuit on the driving circuit, therefore driving control for 120 degrees on a direct current compressor can be realized through adopting the MCU chip with low end mouth resource and low cost, hardware cost is greatly reduced, and market competitiveness of products is increased.
Description
Technical field
The invention belongs to the direct current compressor technical field, specifically, relate to a kind of circuit design that direct current compressor is realized 120 degree drive controlling.
Background technology
Direct current compressor 120 degree drive schemes are Driving technique generally using at present, and along with development of technology with to the understanding in depth of direct current compressor driven algorithm, this Driving technique has not been technical barrier.But, present Driving technique all uses the MCU chip that is exclusively used in motor to realize drive controlling, this class MCU chip has 6 road PWM output ports at least, 3 tunnel rotor position detection are caught port, also will there be resources such as PWM timer inside, have the chip price height of such resource, product market competition pressure is big, is unfavorable for promoting.
Summary of the invention
The present invention must adopt the MCU chip that includes 6 road PWM output ports at least to realize hardware cost height, the product competition problem of big pressure that drive controlling is brought in order to solve existing direct current compressor drive circuit, a kind of new DC compressor drive circuit is provided, by adopting the port expansion design, to reduce requirement to MCU chip port resource, thereby only need adopt the MCU chip that includes 2 road PWM output ports at least can realize 120 of direct current compressor is spent drive controlling, greatly reduce hardware cost, promoted the competitiveness of product in market.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of direct current compressor drive circuit comprises MCU and inverter circuit, and described inverter circuit comprises two groups of totally 6 tunnel control signal ends, is respectively three-phase dc positive terminal Up, Vp, Wp and three-phase dc negative pole end Un, Vn, Wn; Described MCU comprises 2 road PWM output ports at least, is connected with multichannel on the PWM output port of at least one therein road and selects circuit, and the corresponding control signal end that described PWM output port is carried out multichannel expansion back and described inverter circuit connects one to one; Described multichannel selects the gating control end of circuit to receive the channel selecting signal that MCU sends.
Wherein, wherein one road PWM output port of described MCU selects circuit to carry out wherein one group of control signal end that multichannel expansion back connects described inverter circuit by described multichannel.
When described MCU comprised 2 road PWM output ports, wherein one road PWM output port selected circuit to carry out after 3 tunnel expansions respectively the corresponding connection of three-phase dc positive terminal Up, Vp, Wp with described inverter circuit by described multichannel; Another road PWM output port selects circuit to carry out after 3 tunnel expansions respectively the corresponding connection of three-phase dc negative pole end Un, Vn, Wn with described inverter circuit by described multichannel.
When described MCU comprises 4 road PWM output ports, wherein three road PWM output ports respectively with the corresponding connection of three-phase dc positive terminal Up, Vp, Wp of described inverter circuit; Another road PWM output port selects circuit to carry out after 3 tunnel expansions respectively the corresponding connection of three-phase dc negative pole end Un, Vn, Wn with described inverter circuit by described multichannel.
Further, select to comprise 3 selector channels at least in the circuit that the wherein one group of control signal end with described inverter circuit connects one to one respectively at described multichannel, its common port connects wherein one road PWM output port of described MCU.Described MCU selects signal by its GPIO mouth output channel, connects the gating control end that described multichannel is selected circuit.
Further again, in described direct current compressor drive circuit, also include the direct current compressor rotor position detection circuit, reception is from 3 road voltage sampling signals of direct current compressor three-phase terminal, one tunnel dividing potential drop current limliting network of respectively hanging oneself connects the same road input of a comparator, another road input of described comparator connects reference voltage circuit, and its output connects wherein one road input port of described MCU.The three-phase output end of described inverter respectively with the corresponding connection of three-phase terminal of direct current compressor.
Wherein, described voltage sampling signal is the back-emf voltage that the direct current compressor rotor produces in rotary course.
Further, the voltage of in described reference voltage circuit, taking from dc bus after the potential-divider network dividing potential drop as the input that connects described comparator with reference to voltage.
Compared with prior art, advantage of the present invention and good effect are: direct current compressor drive circuit of the present invention carries out the multichannel expansion by the design port expansion circuit to the PWM output port of MCU chip, and save the MCU chip is caught taking of port by designing brand-new direct current compressor rotor position detection circuit, thereby only need adopt the low port resource, the MCU chip of low price can be realized 120 degree drive controlling to direct current compressor, under the prerequisite of effectively guaranteeing control of quality, greatly reduce hardware cost, be enough to satisfy the direct current compressor driving designing requirement of domestic air conditioner, significantly improved the competitiveness of product in market.
After reading the detailed description of embodiment of the present invention in conjunction with the accompanying drawings, other characteristics of the present invention and advantage will become clearer.
Description of drawings
Fig. 1 is the theory diagram of the direct current compressor drive circuit of the existing MCU of employing chip 6 road PWM output control;
Fig. 2 is the improvement schematic block circuit diagram that adopts MCU chip 2 road PWM output control;
Fig. 3 is the improvement schematic block circuit diagram that adopts MCU chip 4 road PWM output control;
Fig. 4 is the contrast figure before and after the direct current compressor rotor position detection circuit improves;
Fig. 5 is the physical circuit schematic diagram of Fig. 3;
Fig. 6 is the physical circuit schematic diagram of Fig. 4.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
In the design of direct current compressor 120 degree drive controlling, mainly comprise two parts circuit design: a part is the design of PWM output scheme; Another part is the design of direct current compressor rotor position detection circuit.The present invention also sets about from this two aspect just direct current compressor drive circuit is improved, and takies in the hope of reaching minimizing MCU port resource, reduces the purpose of design of hardware cost.
At first, for the PWM output scheme, mainly be how to solve that inverter circuit IPM provides its 6 road required pwm control signals in direct current compressor drive circuit.In the prior PWM output scheme, all be to adopt 6 road PWM output ports of MCU chip directly to realize driving with the corresponding connection of 6 tunnel control signal end Up, Vp, Wp, Un, Vn, Wn of IPM, wherein, Up, Vp, Wp are respectively the three-phase dc positive terminal of IPM; Un, Vn, Wn are respectively the three-phase dc negative pole end of IPM.Inverter circuit IPM controls its internal switch circuit operation according to 6 road pwm pulse drive signals that receive, to realize the inversion conversion of direct voltage to alternating voltage, and then output U, V, W three-phase voltage connect the three-phase terminal of direct current compressor, to realize the drive controlling to compressor, its theory diagram is referring to shown in Figure 1.This design needs the MCU chip to have 6 road PWM output ports and PWM timer resource, and such a MCU chip price is very high, therefore, is unfavorable for promoting.
In improvement project of the present invention, by the design port expansion circuit, carry out the multichannel expansion with PWM output port to the MCU chip, thereby can reduce taking to the PWM output port, the MCU chip that use cost is lower can satisfy the control requirement to inverter circuit IPM, reaches the purpose of design that reduces hardware cost, improves competitive power of product.
In design of the present invention, the MCU chip can adopt the low-cost chip that includes 2 road PWM output ports at least to realize, is that example is specifically addressed present design with MCU chip with 2 road PWM output ports and the MCU chip with 4 road PWM output ports below.
As shown in Figure 2, when the MCU chip that is adopted only comprises 2 road PWM output ports, on each road PWM output port, all connect a multichannel and select circuit, described multichannel selects circuit should comprise 3 selector channels at least, thereby can carry out 3 tunnel expansions to each road PWM output port, form 6 road pwm signal lead-out terminal PWM_Up, PWM_Vp, PWM_Wp, PWM_Un, PWM_Vn, PWM_Wn, respectively with 6 tunnel control signal end Up, Vp, Wp, Un, Vn, the corresponding connection of Wn of inverter circuit IPM.The common port COM that described two-way multichannel is selected circuit connects one to one with 2 road PWM output ports of MCU chip respectively, gating control end A, B, C, D respectively with the corresponding connection of channel selecting signal output of MCU chip, receive the channel selecting signal of MCU chip output, and then control described multichannel and select circuit to choose wherein one tunnel alternative passage conducting, with corresponding control signal end output pwm pulse control signal to inverter circuit IPM.
Described channel selecting signal can specifically adopt 4 road GPIO mouths output of MCU chip to provide.Certainly, also can select other ports in the MCU chip to realize that the present invention does not specifically limit this.
When the PWM output port resource of the MCU chip that is adopted is relatively enriched, such as including 4 road PWM output ports, as shown in Figure 3, can only on one road PWM output port, connect multichannel like this and select circuit, it is carried out 3 tunnel expansions, and then respectively with the three-phase dc negative pole end Un of inverter circuit IPM, Vn, Wn (perhaps three-phase dc positive terminal Up, Vp, Wp) the corresponding connection, its excess-three road PWM output port can directly be connected the three-phase dc positive terminal Up of inverter circuit IPM correspondingly, Vp, last (the perhaps three-phase dc negative pole end Un of Wp, Vn, on the Wn), to realize switch control to inverter circuit IPM.
Certainly,, also can copy top implementation specific design corresponding ports expanded circuit, to satisfy demand for control to inverter circuit IPM for MCU chip with other number P WM output port.
Behind the PWM output scheme above adopting, only need revise the software program of MCU inside, realize multichannel is selected the accurate gating control of each path in the circuit, can satisfy the control requirement of inverter circuit IPM.
Secondly, for the direct current compressor rotor position detection circuit, its purpose of design mainly is to realize the waveform of the pwm signal of MCU chip output is proofreaied and correct by the real-time detection to rotor-position, to guarantee that direct current compressor is by setting requirement stable operation.Direct current compressor position detecting circuit commonly used all be adopt No. three comparison circuits respectively to the direct current compressor U that collects V the back electromotive force and the reference value of W three-phase compare, size according to back electromotive force is calculated rotor-position, shown in Fig. 4 left half, such hardware circuit more complicated, three seizure ports that need take the MCU chip come the detection rotor position, therefore, than higher, but software processes is fairly simple to the requirement of MCU chip.
What the design after the improvement adopted is three tunnel synthetic circuit forms, shown in Fig. 4 right half, one tunnel dividing potential drop current limliting network R that will respectively hang oneself from 3 road voltage sampling signal S_U, S_V, the S_W of direct current compressor three-phase terminal U V W connects the same road input (such as in-phase input end) of a comparator IC03, another road input (such as inverting input) of comparator IC03 connects reference voltage VREF, output connects wherein one road input port of MCU chip, such as interrupt signal input port INT etc.Like this, only need one of the MCU chip to catch port and can realize real-time detection to three rotor-positions, its hardware circuit structure is fairly simple, but than higher, calculate complicatedly to the requirement of software, need to cooperate the PWM output signal of MCU chip to determine jointly, but, but can realize the low cost design of hardware, therefore, be suitable for promoting the use of.
Specifically set forth the particular circuit configurations that realizes purpose of design of the present invention below by two specific embodiments.
Embodiment one, and referring to shown in Figure 5, present embodiment is that example is specifically set forth the syndeton between itself and the inverter circuit IPM with the MCU chip IC 101 with 4 road PWM output ports.
Described MCU chip IC 101 itself has 4 road PWM output ports, be respectively RC5, RC4, RC3, RC2, the control requirement of three-phase dc motor is not satisfied in four road PWM output, therefore, need expand one road PWM output port wherein, to realize 6 road PWM output.
As shown in Figure 5,3 road PWM output port RC3 of MCU chip IC 101, RC4, RC5 directly connect one to one with three-phase dc positive terminal Up, Vp, the Wp of inverter circuit IPM respectively, and the 4 road PWM output port RC2 connects the common port that multichannel is selected circuit.Described multichannel selects circuit can specifically adopt one 4 channel selecting chip IC 102 to realize, its common port CY connects the 4 road PWM output port RC2 of MCU chip IC 101, gating control end A, B respectively with the corresponding connection of channel selecting signal output RC1, RC0 of MCU chip IC 101, receive the channel selecting signal of MCU chip IC 101 outputs, wherein, RC1, RC0 can be the two-way GPIO mouths of MCU chip IC 101, realize selecting in the chip IC 102 selection of 3 passage 2Y0,2Y1,2Y2 by exporting 0,1 level.3 alternative passage 2Y0 of described selection chip IC 102,2Y1,2Y2 respectively with the corresponding connection of three-phase dc negative pole end Wn, Un, Vn of inverter circuit IPM.
Embodiment two, and referring to shown in Figure 6, present embodiment is specifically set forth the implementation structure of direct current compressor rotor position detection circuit.
After the three-phase back-emf voltage S_W that obtains from direct current compressor three phase terminals subsample, S_V, S_U carry out current limliting and voltage division processing through the dividing potential drop current limliting network of being made up of resistance R 301/R302/R303, R304/R305/R306, R307/R308/R309 respectively, the in-phase input end that connects comparator IC03, described comparator IC03 can specifically adopt an amplifier chip to realize.The dividing potential drop current limliting network that the inverting input of comparator IC03 is formed by resistance R 312, R316, R317 connects dc bus, and DC bus-bar voltage DC+ is carried out after the voltage division processing as using with reference to voltage.Because the compressor drum rotation can produce back electromotive force, and the back electromotive force size that the angle difference of rotation is produced is also different, in rotor rotation process, will produce the back-emf voltage of a variation like this, compare through comparator IC03 and reference voltage, thereby output measured bursts signal, wherein one road input port that connects MCU chip IC 101 through resistance R 314, such as its interrupt signal input port INT, MCU chip IC 101 is calculated rotor-position according to the pulse signal that receives and its pwm signal that sends.
The present invention is by design PWM port expansion circuit and direct current compressor rotor position detection circuit, thereby on the basis of adopting low-resource, low price MCU chip, realized drive controlling to direct current compressor 120 degree, reduced cost of hardware design, improved product market competitiveness, the direct current compressor that can be widely used in domestic air conditioner drives in the design.
Certainly, the above only is a kind of preferred implementation of the present invention, should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a direct current compressor drive circuit comprises MCU and inverter circuit, and described inverter circuit comprises two groups of totally 6 tunnel control signal ends, is respectively three-phase dc positive terminal Up, Vp, Wp and three-phase dc negative pole end Un, Vn, Wn; It is characterized in that: described MCU comprises 2 road PWM output ports at least, be connected with multichannel on the PWM output port of at least one therein road and select circuit, the corresponding control signal end that described PWM output port is carried out multichannel expansion back and described inverter circuit connects one to one; Described multichannel selects the gating control end of circuit to receive the channel selecting signal that MCU sends.
2. direct current compressor drive circuit according to claim 1 is characterized in that: wherein one road PWM output port of described MCU selects circuit to carry out wherein one group of control signal end that multichannel expansion back connects described inverter circuit by described multichannel.
3. direct current compressor drive circuit according to claim 2, it is characterized in that: select to comprise 3 selector channels at least in the circuit at described multichannel, wherein one group of control signal end with described inverter circuit connects one to one respectively, and its common port connects wherein one road PWM output port of described MCU.
4. direct current compressor drive circuit according to claim 2, it is characterized in that: described MCU comprises 2 road PWM output ports, and wherein one road PWM output port selects circuit to carry out after 3 tunnel expansions respectively the corresponding connection of three-phase dc positive terminal Up, Vp, Wp with described inverter circuit by described multichannel; Another road PWM output port selects circuit to carry out after 3 tunnel expansions respectively the corresponding connection of three-phase dc negative pole end Un, Vn, Wn with described inverter circuit by described multichannel.
5. direct current compressor drive circuit according to claim 3 is characterized in that: described MCU comprises 4 road PWM output ports, wherein three road PWM output ports respectively with the corresponding connection of three-phase dc positive terminal Up, Vp, Wp of described inverter circuit; Another road PWM output port selects circuit to carry out after 3 tunnel expansions respectively the corresponding connection of three-phase dc negative pole end Un, Vn, Wn with described inverter circuit by described multichannel.
6. direct current compressor drive circuit according to claim 1 is characterized in that: described MCU selects signal by its GPIO mouth output channel, connects the gating control end that described multichannel is selected circuit.
7. according to each described direct current compressor drive circuit in the claim 1 to 6, it is characterized in that: in described direct current compressor drive circuit, also include the direct current compressor rotor position detection circuit, reception is from 3 road voltage sampling signals of direct current compressor three-phase terminal, one tunnel dividing potential drop current limliting network of respectively hanging oneself connects the same road input of a comparator, another road input of described comparator connects reference voltage circuit, and its output connects wherein one road input port of described MCU.
8. direct current compressor drive circuit according to claim 7 is characterized in that: described voltage sampling signal is the back-emf voltage that the direct current compressor rotor produces in rotary course.
9. direct current compressor drive circuit according to claim 8 is characterized in that: voltage conduct after the potential-divider network dividing potential drop of taking from dc bus in described reference voltage circuit connects the input of described comparator with reference to voltage.
10. direct current compressor drive circuit according to claim 9 is characterized in that: the three-phase output end of described inverter respectively with the corresponding connection of three-phase terminal of direct current compressor.
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| CN2007101147732A CN101227164B (en) | 2007-11-28 | 2007-11-28 | Direct current compressor drive circuit |
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| CN2007101147732A CN101227164B (en) | 2007-11-28 | 2007-11-28 | Direct current compressor drive circuit |
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| CN101227164B CN101227164B (en) | 2010-09-29 |
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Cited By (7)
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| CN102723857A (en) * | 2011-03-29 | 2012-10-10 | 艾默生网络能源系统北美公司 | An electric circuit for outputting multipath high precision driving signal |
| CN102832873A (en) * | 2012-08-23 | 2012-12-19 | 佛山市顺德区和而泰电子科技有限公司 | Drive method and drive circuit of permanent magnet synchronous motor |
| CN107769669A (en) * | 2016-08-23 | 2018-03-06 | 瑞萨集成电路设计(北京)有限公司 | The output device and method of a kind of pulse width modulating signal |
| CN108319252A (en) * | 2018-01-09 | 2018-07-24 | 深圳市深蓝新能源电气有限公司 | A kind of Compressor Failure Detection device and method |
| CN110542460A (en) * | 2019-09-03 | 2019-12-06 | 西安安森智能仪器股份有限公司 | multi-channel ultrasonic flowmeter transducer driving circuit and control method thereof |
| CN116594339A (en) * | 2023-05-17 | 2023-08-15 | 上海铼钠克数控科技有限公司 | Adapter plate, switching system and control system of one-to-multiple driver |
| CN107769669B (en) * | 2016-08-23 | 2024-05-07 | 瑞萨集成电路设计(北京)有限公司 | Pulse width modulation signal output device and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6078509A (en) * | 1998-11-16 | 2000-06-20 | Lucent Technologies Inc., | Multiple output flyback converter having improved cross-regulation and method of operation thereof |
| CN1980044A (en) * | 2005-12-05 | 2007-06-13 | 乐金电子(天津)电器有限公司 | Counterelectro motive detection circuit of dc. brush-free motor |
| CN201122922Y (en) * | 2007-11-28 | 2008-09-24 | 海信（山东）空调有限公司 | Driving circuit of DC compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102723857A (en) * | 2011-03-29 | 2012-10-10 | 艾默生网络能源系统北美公司 | An electric circuit for outputting multipath high precision driving signal |
| CN102723857B (en) * | 2011-03-29 | 2015-07-08 | 艾默生网络能源系统北美公司 | An electric circuit for outputting multipath high precision driving signal |
| CN102832873A (en) * | 2012-08-23 | 2012-12-19 | 佛山市顺德区和而泰电子科技有限公司 | Drive method and drive circuit of permanent magnet synchronous motor |
| CN107769669A (en) * | 2016-08-23 | 2018-03-06 | 瑞萨集成电路设计(北京)有限公司 | The output device and method of a kind of pulse width modulating signal |
| CN107769669B (en) * | 2016-08-23 | 2024-05-07 | 瑞萨集成电路设计(北京)有限公司 | Pulse width modulation signal output device and method |
| CN108319252A (en) * | 2018-01-09 | 2018-07-24 | 深圳市深蓝新能源电气有限公司 | A kind of Compressor Failure Detection device and method |
| CN108319252B (en) * | 2018-01-09 | 2020-01-14 | 深圳市深蓝新能源电气有限公司 | Compressor fault detection device and method |
| CN110542460A (en) * | 2019-09-03 | 2019-12-06 | 西安安森智能仪器股份有限公司 | multi-channel ultrasonic flowmeter transducer driving circuit and control method thereof |
| CN110542460B (en) * | 2019-09-03 | 2021-07-27 | 西安安森智能仪器股份有限公司 | Multi-channel ultrasonic flowmeter transducer driving circuit and control method thereof |
| CN116594339A (en) * | 2023-05-17 | 2023-08-15 | 上海铼钠克数控科技有限公司 | Adapter plate, switching system and control system of one-to-multiple driver |
| CN116594339B (en) * | 2023-05-17 | 2024-01-23 | 上海铼钠克数控科技有限公司 | Adapter plate, switching system and control system of one-to-multiple driver |
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Owner name: HAIXIN( SHANDONG ) AIR CONDITIONING CO., LTD. Free format text: FORMER OWNER: HAIXIN GROUP CO., LTD. Effective date: 20090821 |
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Effective date of registration: 20090821 Address after: 151, Zhuzhou Road, Laoshan District, Shandong City, Qingdao Province, China: 266100 Applicant after: Hisense (Shandong) Air-Conditioning Co., Ltd. Address before: 151, Zhuzhou Road, Laoshan District, Shandong City, Qingdao Province, China: 266100 Applicant before: Hisense Group Co-applicant before: Haisense Air Conditioner Co., Ltd., Qingdao |
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