CN111355423A - Drive control circuit, drive control method, circuit board and air conditioner - Google Patents

Drive control circuit, drive control method, circuit board and air conditioner Download PDF

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Publication number
CN111355423A
CN111355423A CN202010301191.0A CN202010301191A CN111355423A CN 111355423 A CN111355423 A CN 111355423A CN 202010301191 A CN202010301191 A CN 202010301191A CN 111355423 A CN111355423 A CN 111355423A
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CN
China
Prior art keywords
module
power supply
switch
switching tube
terminal
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.)
Pending
Application number
CN202010301191.0A
Other languages
Chinese (zh)
Inventor
曾贤杰
黄招彬
赵鸣
文先仕
龙谭
胡斌
张杰楠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, GD Midea Air Conditioning Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN202010301191.0A priority Critical patent/CN111355423A/en
Publication of CN111355423A publication Critical patent/CN111355423A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
    • H02P25/184—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays wherein the motor speed is changed by switching from a delta to a star, e.g. wye, connection of its windings, or vice versa
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1582—Buck-boost converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
    • H02P25/182—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays whereby the speed is regulated by using centrifucal devices, e.g. switch, resistor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

The invention discloses a drive control circuit, a drive control method, a circuit board and an air conditioner, wherein the drive control circuit comprises a switch component, a first inversion module, a second inversion module, a first direct current power supply module and a second direct current power supply module; through setting up first DC power module and second DC power module, can provide different supply voltage for first contravariant module and second contravariant module respectively, first contravariant module and second contravariant module provide corresponding driving voltage to three-phase winding when respectively under three-phase winding is in different connection state again for all can obtain suitable driving voltage when three-phase winding is in different connection state, in order to realize that the motor can the high-efficient operation at different connection mode homoenergetic.

Description

Drive control circuit, drive control method, circuit board and air conditioner
Technical Field
The invention relates to the technical field of motor driving, in particular to a driving control circuit, a driving control method, a circuit board and an air conditioner.
Background
The variable frequency compressor of the existing variable frequency air conditioner mostly adopts a permanent magnet motor as a driving motor, and is influenced by the operation requirement of the variable frequency air conditioner, a three-phase winding of the permanent magnet motor generally needs to be switched between star connection and triangular connection, and when the variable frequency compressor is in different connection modes, the operation frequencies of the motor are different, so that the driving voltages required by the three-phase winding are also different. However, the dc bus voltage cannot simultaneously satisfy the driving voltage requirements of the motor when the motor operates in different connection modes, and the motor cannot efficiently operate in different connection modes.
Disclosure of Invention
The present invention is directed to solve at least one of the problems of the prior art, and provides a driving control circuit, a driving control method, a circuit board, an air conditioner, and a computer storage medium, which can provide different motor connection modes and motor driving voltages to enable a motor to operate efficiently at different operating frequencies.
A drive control circuit according to an embodiment of a first aspect of the present invention for driving an open-winding motor having three-phase windings, one end of each of the phases of the windings constituting a first three-phase outgoing line group, the other end of each of the phases of the windings constituting a second three-phase outgoing line group, includes:
the switch assembly is connected with the second three-phase outlet line group; the switch assembly is closed, and the three-phase winding is switched into star connection; the switch assembly is switched on, and the three-phase winding is switched to be connected with an open winding;
the first inversion module is connected with the first three-phase outgoing line group and used for outputting a first driving voltage to the three-phase windings in a star connection state and a winding opening state;
the second inversion module is connected with the second three-phase outgoing line group and used for outputting a second driving voltage to the three-phase winding in the open winding connection state;
the first direct current power supply module is connected with the first inversion module and used for providing a first power supply voltage for the first inversion module;
and the second direct current power supply module is connected with the second inversion module and used for providing a second power supply voltage for the second inversion module.
The drive control circuit according to the embodiment of the invention has at least the following beneficial effects: by arranging the switch assembly, the connection mode of the three-phase winding can be switched according to different running frequencies of the motor, and the running efficiency of the motor is improved; through setting up first DC power module and second DC power module, can provide different supply voltage for first contravariant module and second contravariant module respectively, first contravariant module and second contravariant module provide corresponding driving voltage to three-phase winding when respectively under three-phase winding is in different connection state again for all can obtain suitable driving voltage when three-phase winding is in different connection state, in order to realize that the motor can the high-efficient operation at different connection mode homoenergetic.
According to some embodiments of the invention, the switch assembly comprises a first switch and a second switch, the second three-phase outlet line set comprises a first terminal, a second terminal and a third terminal, the first switch is respectively connected with the first terminal and the second terminal, and the second switch is respectively connected with the second terminal and the third terminal. The switch component is closed, namely the first switch is closed and the second switch is closed, so that the first end, the second end and the third end of the second three-phase outgoing line group are connected in short, and the three-phase winding is in a star connection state; the disconnection of the switch component is that the first switch is disconnected and the second switch is disconnected, the first three-phase wire outlet group of the three-phase winding is connected with the first inversion module, and the second three-phase wire outlet group of the three-phase winding is connected with the second inversion module, so that the three-phase winding is in a winding-open connection state.
According to some embodiments of the invention, the switch assembly comprises a third switch, a fourth switch and a fifth switch, the second three-phase outgoing line group comprises a first end, a second end and a third end, one end of the third switch is connected with the first end, one end of the fourth switch is connected with the second end, one end of the fifth switch is connected with the third end, and the other end of the third switch, the other end of the fourth switch and the other end of the fifth switch are short-circuited. Similarly, the switch component is closed, that is, the third switch is closed, the fourth switch is closed, and the fifth switch is closed, so that the first end, the second end, and the third end of the second three-phase outgoing line group are short-circuited together, and the three-phase winding is in a star connection state; the disconnection of the switch component is that the disconnection of the third switch, the disconnection of the fourth switch and the disconnection of the fifth switch, the first three-phase outgoing line group of the three-phase winding is connected with the first inversion module, and the second three-phase outgoing line group of the three-phase winding is connected with the second inversion module, so that the three-phase winding is in an open winding connection state.
Wherein the first switch is one of an electromagnetic relay, a solid state relay, a contactor or an electronic switch; the second switch is one of an electromagnetic relay, a solid-state relay, a contactor or an electronic switch; the third switch is one of an electromagnetic relay, a solid-state relay, a contactor or an electronic switch; the fourth switch is one of an electromagnetic relay, a solid-state relay, a contactor or an electronic switch; the fifth switch is one of an electromagnetic relay, a solid-state relay, a contactor or an electronic switch. The electromagnetic relay, the solid-state relay, the contactor or the electronic switch can realize the functions of the first switch, the second switch, the third switch, the fourth switch and the fifth switch, and can be used as the model selection of the first switch, the second switch, the third switch, the fourth switch and the fifth switch.
According to some embodiments of the present invention, a first capacitor is further connected between the first dc power supply module and the first inverter module; and a second capacitor is also connected between the second direct current power supply module and the second inversion module. The first capacitor can filter out the alternating current component of the output voltage of the first direct current power supply module; the second capacitor may filter an alternating current component of the output voltage of the second direct current power supply module.
According to some embodiments of the present invention, the power supply further comprises an ac power input terminal and a rectifier bridge, the ac power input terminal is connected to the rectifier bridge, and the output terminal of the rectifier bridge is connected to the first dc power supply module and the second dc power supply module, respectively. Alternating current power supply inputs the rectifier bridge from alternating current power supply input, after the rectification, supplies power respectively for first direct current power module with second direct current power module adopts a power can satisfy the power supply requirement, can practice thrift the cost and reduce occupation space.
According to some embodiments of the invention, the first dc power supply module is a buck circuit and the second dc power supply module is a boost circuit. When the motor runs at low speed, the three-phase winding is in a star-shaped connection state, the voltage reduction circuit supplies power independently, lower more appropriate voltage can be provided for the motor, the running efficiency of the motor is better when the motor runs at low speed, and the output voltage of the voltage reduction circuit can be regulated according to the current rotating speed, so that the running efficiency of the motor is further optimized; when the motor runs at a medium-high speed, the three-phase winding is in an open winding connection state, the voltage reduction circuit and the voltage boost circuit supply power together, and higher voltage is provided through the voltage boost circuit, so that the requirement of high-speed running of the motor is met, and the running efficiency of the motor is further optimized.
Further, the voltage reduction circuit is a voltage reduction chopper circuit, and the voltage boost circuit is a voltage boost chopper circuit.
According to some embodiments of the present invention, the buck chopper circuit includes a first switching tube, a second switching tube, and a first inductor, wherein an anode of an output end of the rectifier bridge is connected to one end of the first switching tube, another end of the first switching tube is respectively connected to one end of the second switching tube and one end of the first inductor, another end of the first inductor is connected to an anode of an input end of the first inverter module, and a cathode of the output end of the rectifier bridge is respectively connected to another end of the second switching tube and a cathode of the input end of the first inverter module.
According to some embodiments of the invention, the boost chopper circuit includes a second inductor, a third switch tube and a fourth switch tube, an output end positive electrode of the rectifier bridge is connected to one end of the second inductor, the other end of the second inductor is respectively connected to one end of the third switch tube and one end of the fourth switch tube, the other end of the third switch tube is connected to an input end positive electrode of the second inverter module, and an output end negative electrode of the rectifier bridge is respectively connected to the other end of the fourth switch tube and an input end negative electrode of the second inverter module.
According to some embodiments of the present invention, the first DC power module and the second DC power module are both AC/DC conversion modules, and the driving control circuit further includes a first AC power input end and a second AC power input end, where the first AC power input end is connected to the first DC power module, and the second AC power input end is connected to the second DC power module. Through adopting two alternating current power supplies of mutual isolation, supply power respectively for AC/DC conversion module, have better independence, avoid producing mutual interference when controlling.
According to some embodiments of the present invention, the first DC power module and the second DC power module are both AC/DC conversion modules and are isolated from each other, and the driving control circuit further includes an AC power input terminal, and the AC power input terminal is respectively connected to the first DC power module and the second DC power module. Through sharing an alternating current power supply and adopting two AC/DC conversion modules which are isolated from each other, the first inversion module and the second inversion module can be independently powered, so that the better independence is realized, and the mutual interference generated in the control process is avoided.
According to some embodiments of the present invention, the first DC power module is an AC/DC conversion module, the second DC power module is a DC/DC conversion module, and the driving control circuit further includes an AC power input terminal and a DC power input terminal, the AC power input terminal is connected to the first DC power module, and the DC power input terminal is connected to the second DC power module. In a similar way, the independence of the power supplies can be realized by adopting two independent power supplies of the direct-current power supply and the alternating-current power supply, and mutual interference generated in control is avoided.
According to some embodiments of the invention, the output terminal of the first dc power supply module is connected to the input terminal of the second dc power supply module. The first direct current power supply module and the second direct current power supply module form a series-connected common-ground direct current power supply, the voltages of the first direct current power supply module and the second direct current power supply module can be the same or different, and the first inversion module and the second inversion module are respectively used for controlling the operation of the motor.
According to some embodiments of the invention, the driving control circuit further includes an ac power supply input terminal, the first dc power supply module includes a fifth switching tube, a sixth switching tube, a seventh switching tube, an eighth switching tube, a ninth switching tube and a third inductor, one end of the ac power supply input terminal is connected to one end of the fifth switching tube and one end of the seventh switching tube, the other end of the ac power supply input terminal is connected to one end of the sixth switching tube and one end of the eighth switching tube, the other end of the fifth switching tube and the other end of the sixth switching tube are connected to one end of the third inductor and one end of the ninth switching tube, the other end of the third inductor is used as an output terminal anode of the first dc power supply module and is connected to an input terminal anode of the first inverter module, and the other end of the seventh switching tube is connected to an output terminal anode of the first dc power supply module, The other end of the eighth switching tube and the other end of the ninth switching tube are connected together to serve as the cathode of the output end of the first direct current power supply module and connected to the cathode of the input end of the first inversion module; and the second direct-current power supply module is a boost chopper circuit. The first direct-current power supply module adopts a bridgeless Buck circuit consisting of a fifth switching tube, a sixth switching tube, a seventh switching tube, an eighth switching tube, a ninth switching tube and a third inductor to form a stable step-down direct-current power supply; the second direct-current power supply module adopts a boost chopper circuit to form a stable boost direct-current power supply; therefore, two series-connected direct current power supplies with different voltages are formed and respectively supplied to the first inversion module and the second inversion module.
According to some embodiments of the present invention, the driving control circuit further includes an ac power supply access end and a rectifier bridge, the first dc power supply module is a buck chopper circuit, the second dc power supply module is a boost chopper circuit, the ac power supply access end is connected to an input end of the rectifier bridge, an output end of the rectifier bridge is connected to an input end of the buck chopper circuit, and an output end of the buck chopper circuit is connected to an input end of the boost chopper circuit. The alternating current power supply is converted into direct current through the rectifier bridge, the first direct current power supply module adopts a buck chopper circuit to form a stable buck direct current power supply, and the second direct current power supply module adopts a boost chopper circuit to form a stable boost direct current power supply; therefore, two series-connected direct current power supplies with different voltages are formed and respectively supplied to the first inversion module and the second inversion module.
According to some embodiments of the present invention, the driving control circuit further includes an ac power supply access terminal, the second dc power supply module is a totem-pole PFC circuit, the first dc power supply module is a buck chopper circuit, the ac power supply access terminal is connected to an input terminal of the totem-pole PFC circuit, and an output terminal of the totem-pole PFC circuit is connected to an input terminal of the buck chopper circuit.
Further, the totem pole PFC circuit includes a fifth inductor, a twelfth switching tube, a thirteenth switching tube, a fourteenth switching tube and a fifteenth switching tube, one end of the ac power supply incoming end is connected to one end of the fifth inductor, the other end of the fifth inductor is connected to one end of the twelfth switching tube and one end of the fourteenth switching tube, the other end of the ac power supply incoming end is connected to one end of the thirteenth switching tube and one end of the fifteenth switching tube, the other end of the twelfth switching tube and the other end of the thirteenth switching tube are connected together to serve as an output end positive electrode of the totem pole PFC circuit, and the other end of the fourteenth switching tube and the other end of the fifteenth switching tube are connected together to serve as an output end negative electrode of the totem pole PFC circuit. The second direct-current power supply module forms a stable boosting direct-current power supply by adopting a totem-pole PFC circuit consisting of a fifth inductor, a twelfth switching tube, a thirteenth switching tube, a fourteenth switching tube and a fifteenth switching tube; the first direct-current power supply module forms a stable step-down direct-current power supply by adopting a step-down chopper circuit; therefore, two series-connected DC power supplies with different voltages and the same ground are formed and are respectively supplied to the first inverter module and the second inverter module. When the motor operates at a low speed, the switch assembly is closed, the motor is in a star-shaped connection state, the totem-pole PFC circuit and the buck chopper circuit work normally, the motor is controlled to operate through the first inversion module, the output voltage of the buck chopper circuit can be adjusted in real time through the current rotating speed, and the operation efficiency of the motor is further optimized. When the motor runs at a high speed, the switch assembly is opened, the motor is in an open winding connection state, the totem-pole PFC circuit and the buck chopper circuit work normally, the two direct-current power supplies control the motor to run through the first inversion module and the second inversion module respectively, and the output voltages of the totem-pole PFC circuit and the buck chopper circuit can be adjusted in real time through the current rotating speed, so that the running efficiency of the motor is further optimized.
According to a second aspect of the present invention, there is provided a driving control method applied to a driving control circuit for driving an open-winding motor having three-phase windings, one end of each phase of the windings forming a first three-phase outgoing line group, and the other end of each phase of the windings forming a second three-phase outgoing line group, the driving control circuit including:
the switch assembly is connected with the second three-phase outlet line group; the switch assembly is closed, and the three-phase winding is switched into star connection; the switch assembly is switched on, and the three-phase winding is switched to be connected with an open winding;
the first inversion module is connected with the first three-phase outgoing line group;
the second inversion module is connected with the second three-phase outgoing line group;
the first direct current power supply module is connected with the first inversion module;
the second direct current power supply module is connected with the second inversion module;
the method comprises the following steps:
controlling the switching of the switching assembly to switch the three-phase winding between a star connection and an open winding connection;
and controlling the first inversion module and the second inversion module to start or stop working so as to enable the first inversion module and the second inversion module to provide driving voltage for the three-phase winding in the corresponding connection state.
The control method of the driving circuit according to the embodiment of the invention has at least the following beneficial effects: the switching through control switch subassembly realizes that the connection state of three-phase winding switches, and begins or stop work through control first contravariant module and second contravariant module to the realization provides driving voltage and gives the three-phase winding under corresponding connection state, makes three-phase winding all can obtain suitable driving voltage when being in different connection state, in order to realize that the motor homoenergetic high-efficient operation is in different connection modes.
According to some embodiments of the invention:
the controlling of the opening and closing of the switching assembly to switch the three-phase winding between a star connection state and an open winding connection state includes:
controlling the switch assembly to be opened so that the three-phase winding is switched to an open winding connection state;
the controlling the first inverter module and the second inverter module to start or stop working so that the first inverter module and the second inverter module provide driving voltages to the three-phase windings in corresponding connection states includes:
and controlling the first inversion module to work, and controlling the second inversion module to work so that the first inversion module provides a first driving voltage for the three-phase winding in the open winding connection state, and the second inversion module provides a second driving voltage for the three-phase winding in the open winding connection state.
In the technical scheme, the three-phase winding is switched to the open winding connection state by controlling the switch component to be opened, the first inversion module and the second inversion module are controlled to work, and the first driving voltage and the second driving voltage are respectively provided for the three-phase winding in the open winding connection state, so that the three-phase winding can obtain the appropriate driving voltage when being in the open winding connection state, and the motor can efficiently run in the open winding connection mode.
According to some embodiments of the invention:
the controlling of the opening and closing of the switching assembly to switch the three-phase winding between a star connection state and an open winding connection state includes:
controlling the switch assembly to be closed so that the three-phase winding is switched to a star connection state;
the controlling the first inverter module and the second inverter module to start or stop working so that the first inverter module and the second inverter module provide driving voltages to the three-phase windings in corresponding connection states includes:
and controlling the first inversion module to work, and controlling the second inversion module to stop working so as to enable the first inversion module to provide a first driving voltage for the three-phase winding in the star connection state.
In the technical scheme, the three-phase winding is switched to the star connection state by controlling the switch component to be closed, the first inverter module is controlled to work, the first driving voltage is provided for the three-phase winding in the star connection state, the suitable driving voltage can be obtained when the three-phase winding is in the star connection state, and the second inverter module is controlled to stop working, so that the loss in the operation of the star connection state is reduced, and the star connection mode of the motor can run efficiently.
According to some embodiments of the invention, the second inverting module is controlled to provide a third driving voltage to the three-phase winding before the switching component is actuated, the third driving voltage being a neutral point voltage of the three-phase winding in a star connection state. Through before the control switch subassembly is opened or is closed, control the second contravariant module earlier and provide third driving voltage to three-phase winding, can be so that control switch subassembly action back, the motor still can maintain steady operation, and it is smooth and easy to guarantee that the connection state switches, avoids the motor to receive voltage impact and produce when switching and pause to hinder or brake.
According to a third aspect of the present invention, there is provided a wiring board including the driving control circuit according to the first aspect of the present invention.
The circuit board provided by the embodiment of the invention at least has the following beneficial effects: by arranging the switch assembly, the connection mode of the three-phase winding can be switched according to different running frequencies of the motor, and the running efficiency of the motor is improved; through setting up first DC power module and second DC power module, can provide different supply voltage for first contravariant module and second contravariant module respectively, first contravariant module and second contravariant module provide corresponding driving voltage to three-phase winding when respectively under three-phase winding is in different connection state again for all can obtain suitable driving voltage when three-phase winding is in different connection state, in order to realize that the motor can the high-efficient operation at different connection mode homoenergetic.
According to a fourth aspect of the present invention, there is provided an air conditioner comprising the wiring board according to the third aspect of the present invention; alternatively, the first and second electrodes may be,
comprising at least one processor and a memory for communicative connection with the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the drive control method according to the embodiment of the third aspect of the present invention.
The air conditioner provided by the embodiment of the invention has at least the following beneficial effects: by arranging the switch assembly, the connection mode of the three-phase winding can be switched according to different running frequencies of the motor, and the running efficiency of the motor is improved; through setting up first DC power module and second DC power module, can provide different supply voltage for first contravariant module and second contravariant module respectively, first contravariant module and second contravariant module provide corresponding driving voltage to three-phase winding when respectively under three-phase winding is in different connection state again for all can obtain suitable driving voltage when three-phase winding is in different connection state, in order to realize that the motor can the high-efficient operation at different connection mode homoenergetic.
A computer storage medium according to an embodiment of the fifth aspect of the present invention stores computer-executable instructions for causing a computer to perform the drive control method according to the embodiment of the third aspect of the present invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
fig. 1 is a schematic circuit diagram of a driving control circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a driving control circuit according to a second embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a driving control circuit according to a third embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a driving control circuit according to a fourth embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a driving control circuit according to a fifth embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a driving control circuit according to a sixth embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a driving control circuit according to a seventh embodiment of the present invention;
fig. 8 is a schematic circuit diagram of a driving control circuit according to an eighth embodiment of the present invention;
fig. 9 is a schematic circuit diagram of a driving control circuit according to a ninth embodiment of the present invention;
fig. 10 is a schematic circuit diagram of a driving control circuit according to a tenth embodiment of the present invention;
fig. 11 is a schematic circuit diagram of a driving control circuit according to an eleventh embodiment of the present invention;
fig. 12 is a flowchart of a driving control method according to a twelfth embodiment of the present invention;
fig. 13 is a flowchart of a driving control method according to a thirteenth embodiment of the present invention;
fig. 14 is a flowchart of a driving control method according to a fourteenth embodiment of the present invention;
fig. 15 is a schematic diagram illustrating a switching process of a driving control method according to a first embodiment of the invention;
fig. 16 is a schematic diagram illustrating a switching process of a driving control method according to a fourth embodiment of the present invention;
fig. 17 is a schematic diagram of a switching process of a driving control method according to a ninth embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The variable frequency compressor of the existing variable frequency air conditioner mostly adopts a permanent magnet motor as a driving motor, and is influenced by the operation requirement of the variable frequency air conditioner, a three-phase winding of the permanent magnet motor generally needs to be switched between star connection and triangular connection, and when the variable frequency compressor is in different connection modes, the operation frequencies of the motor are different, so that the driving voltages required by the three-phase winding are also different. However, the dc bus voltage cannot simultaneously satisfy the driving voltage requirements of the motor when the motor operates in different connection modes, and the motor cannot efficiently operate in different connection modes.
Based on this, the embodiment of the invention provides a drive control circuit, a circuit board and an air conditioner, which can realize that a motor can efficiently run in different connection modes.
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1, a first embodiment of the present invention provides a drive control circuit for driving an open-winding motor having three-phase windings, one end of each phase winding forms a first three-phase outgoing line group 100, and the other end of each phase winding forms a second three-phase outgoing line group 200, specifically, the three-phase windings include an a-phase winding, a B-phase winding, and a C-phase winding, where the second three-phase outgoing line group 200 includes a first end 210, a second end 220, and a third end 230, the first end 210 is one end of the a-phase winding, the second end 220 is one end of the B-phase winding, and the third end 230 is one end of the C-phase winding; correspondingly, the first three-phase outgoing line group 100 includes a fourth end 110, a fifth end 120 and a sixth end 130, the fourth end 110 is the other end of the a-phase winding, the fifth end 120 is the other end of the B-phase winding, the sixth end 130 is the other end of the C-phase winding, the driving control circuit includes a switch component KY, a first inversion module, a second inversion module, a first dc power module and a second dc power module, and the switch component KY is connected with the second three-phase outgoing line group 200; the switch component KY is closed, and the three-phase winding is switched to star connection; the switch component KY is turned on, and the three-phase winding is switched to be connected with an open winding; the first inversion module is connected with the first three-phase outgoing line group 100 and is used for outputting a first driving voltage to the three-phase windings in the star connection state and the open winding state; the second inversion module is connected to the second three-phase outgoing line group 200, and is configured to output a second driving voltage to the three-phase winding in the open winding connection state; the first direct current power supply module is connected with the first inversion module and used for providing a first power supply voltage for the first inversion module; the second direct current power supply module is connected with the second inversion module and used for providing a second power supply voltage for the second inversion module.
In the drive control circuit of the embodiment, by arranging the switch assembly, the connection mode of the three-phase winding can be switched according to different operating frequencies of the motor, so that the operating efficiency of the motor is improved; through setting up first DC power module and second DC power module, can provide different supply voltage for first contravariant module and second contravariant module respectively, first contravariant module and second contravariant module provide corresponding driving voltage to three-phase winding when respectively under three-phase winding is in different connection state again for all can obtain suitable driving voltage when three-phase winding is in different connection state, in order to realize that the motor can the high-efficient operation at different connection mode homoenergetic. The motor generally runs at low frequency when the three-phase winding is in a star connection state, and the first driving voltage provided by the first inverter module to the three-phase winding is low; when the three-phase winding is in an open winding connection state, the motor generally runs at medium-high frequency, and the first inversion module and the second inversion module supply power to the three-phase winding at the same time. It is understood that the above-mentioned low-frequency operation and middle-high-frequency operation are based on the relative judgment between the two connection states of the motor, and no limitation is made to the specific operation frequency.
In addition, the first inverter module comprises a first bridge arm, a second bridge arm and a third bridge arm which are connected in parallel, the first bridge arm, the second bridge arm and the third bridge arm respectively comprise two power switching tubes which are connected in series, and the power switching tubes adopt MOS devices. The first inverter module is used as a main driving device of the motor, the power switch tube of the first inverter module adopts an MOS device, and compared with an IGBT device, the MOS device has the advantages of small current and lower conduction voltage drop when in light load, and therefore, the first inverter module has the advantage of high operation efficiency.
Referring to fig. 1, in some embodiments of the present invention, the switch assembly KY includes a first switch and a second switch, the first switch is respectively connected to the first terminal 210 and the second terminal 220, and the second switch is respectively connected to the second terminal 220 and the third terminal 230. The switch component KY is closed, that is, the first switch is closed and the second switch is closed, so that the first end 210, the second end 220 and the third end 230 of the second three-phase outgoing line group 200 are shorted together, so that the three-phase windings are in a star connection state; the switch component KY disconnection is a first switch disconnection and a second switch disconnection, the first three-phase outgoing line group 100 of the three-phase winding is connected with the first inversion module, and the second three-phase outgoing line group 200 of the three-phase winding is connected with the second inversion module, so that the three-phase winding is in an open winding connection state.
It is understood that the switch assembly KY can be implemented in the manner as shown in fig. 2, besides the first switch and the second switch in fig. 1, that is: the switch component KY comprises a third switch, a fourth switch and a fifth switch, wherein one end of the third switch is connected with the first end 210, one end of the fourth switch is connected with the second end 220, one end of the fifth switch is connected with the third end 230, and the other end of the third switch, the other end of the fourth switch and the other end of the fifth switch are in short circuit. Similarly, the switch component KY is closed, that is, the third switch, the fourth switch and the fifth switch are closed, so that the first end 210, the second end 220 and the third end 230 of the second three-phase outgoing line group are shorted together, and the three-phase winding is in a star connection state; the disconnection of the switch component is that the disconnection of the third switch, the disconnection of the fourth switch and the disconnection of the fifth switch, the first three-phase outgoing line group of the three-phase winding is connected with the first inversion module, and the second three-phase outgoing line group of the three-phase winding is connected with the second inversion module, so that the three-phase winding is in an open winding connection state.
The first switch is one of an electromagnetic relay, a solid-state relay, a contactor or an electronic switch; the second switch is one of an electromagnetic relay, a solid-state relay, a contactor or an electronic switch; the third switch is one of an electromagnetic relay, a solid-state relay, a contactor or an electronic switch; the fourth switch is one of an electromagnetic relay, a solid-state relay, a contactor or an electronic switch; the fifth switch is one of an electromagnetic relay, a solid state relay, a contactor, or an electronic switch. The electromagnetic relay, the solid-state relay, the contactor or the electronic switch can realize the functions of the first switch, the second switch, the third switch, the fourth switch and the fifth switch, and can be used as the model selection of the first switch, the second switch, the third switch, the fourth switch and the fifth switch.
It will be appreciated that the first and second switches may be two switches that act in interlock to achieve simultaneous action; or the interlocking is not needed, and only the control signals need to be synchronized. If the first switch and the second switch adopt two switches which are interlocked, the interlocking mode can be mechanical interlocking or electronic interlocking. Similarly, the third switch, the fourth switch and the fifth switch may be three switches acting in an interlocking manner to achieve simultaneous action; or the interlocking is not needed, and only the control signals need to be synchronized. If the third switch, the fourth switch and the fifth switch adopt three switches operated in an interlocking manner, the interlocking manner may be a mechanical interlocking or an electronic interlocking.
Referring to fig. 1, in some embodiments of the present invention, a first capacitor C1 is further connected between the first dc power module and the first inverter module; and a second capacitor C2 is also connected between the second direct current power supply module and the second inverter module. The first capacitor C1 is used as a dc bus capacitor and can filter and remove the ac component of the output voltage of the first dc power supply module; similarly, the second capacitor C2 serves as a dc bus capacitor, and can filter out the ac component of the output voltage of the second dc power supply module.
Referring to fig. 3, in an embodiment of the present invention, the power supply further includes an ac power input terminal and a rectifier bridge, the ac power input terminal is connected to the rectifier bridge, and an output terminal of the rectifier bridge is connected to the first dc power module and the second dc power module, respectively. An Alternating Current (AC) power supply is input into the rectifier bridge from the AC power supply input end, and after rectification, the AC power supply supplies power to the first DC power supply module and the second DC power supply module respectively, so that a common-ground DC power supply is formed. Specifically, the first dc power supply module is a step-down circuit, and the second dc power supply module is a step-up circuit. When the motor runs at a low speed, the switch assembly KY is closed, the three-phase winding is in a star-shaped connection state, the voltage reduction circuit supplies power independently, and lower and more appropriate voltage can be provided for the motor, so that the running efficiency of the motor is better when the motor runs at the low speed, and the output voltage of the voltage reduction circuit can be regulated according to the current rotating speed, so that the running efficiency of the motor is further optimized; when the motor is in middle and high speed operation, switch assembly KY opens, and three-phase winding is in open winding connected state, and step-down circuit and boost circuit supply power jointly, provide higher voltage through boost circuit to satisfy the demand of the high-speed operation of motor, make the operating efficiency of motor further optimize.
Referring to fig. 4, preferably, the step-down circuit is a step-down chopper circuit, and the step-up circuit is a step-up chopper circuit:
the buck chopper circuit comprises a first switch tube Q1, a second switch tube Q2 and a first inductor L1, the positive electrode of the output end of the rectifier bridge is connected with one end of the first switch tube Q1, the other end of the first switch tube Q1 is respectively connected with one end of the second switch tube Q2 and one end of the first inductor L1, the other end of the first inductor L1 is connected with the positive electrode of the input end of the first inverter module, and the negative electrode of the output end of the rectifier bridge is respectively connected with the other end of the second switch tube Q2 and the negative electrode of the input end of the first inverter module; the boost chopper circuit comprises a second inductor L2, a third switch tube Q3 and a fourth switch tube Q4, the positive electrode of the output end of the rectifier bridge is connected with one end of the second inductor L2, the other end of the second inductor L2 is connected with one end of the third switch tube Q3 and one end of the fourth switch tube Q4 respectively, the other end of the third switch tube Q3 is connected with the positive electrode of the input end of the second inverter module, and the negative electrode of the output end of the rectifier bridge is connected with the other end of the fourth switch tube Q4 and the negative electrode of the input end of the second inverter module respectively.
Referring to fig. 5, in an embodiment of the present invention, the first direct current power module and the second direct current power module are both AC/DC conversion modules, the driving control circuit further includes a first alternating current power supply access end and a second alternating current power supply access end, the alternating current power supply AC1 is connected to the first alternating current power supply access end, the alternating current power supply AC2 is connected to the second alternating current power supply access end, and the first alternating current power supply access end is connected to the first direct current power module, that is, the AC/DC conversion module 1; the second AC power supply access end is connected to the second DC power supply module, that is, the AC/DC conversion module 2. Through adopting two alternating current power supplies of mutual isolation, supply power respectively for AC/DC conversion module, have better independence, avoid producing mutual interference when controlling.
Referring to fig. 6, in an embodiment of the present invention, the first DC power module and the second DC power module are both AC/DC conversion modules and are isolated from each other, that is, the isolated AC/DC conversion module 1 and the isolated AC/DC conversion module 2 in fig. 6, and the driving control circuit further includes an AC power input end, where the AC power input end is connected to the isolated AC/DC conversion module 1 and the isolated AC/DC conversion module 2, respectively. Through sharing an alternating current power supply AC to adopt two AC/DC conversion modules of mutual isolation, also can realize supplying power alone first contravariant module and second contravariant module, have better independence, avoid producing mutual interference when control.
Referring to fig. 7, in an embodiment of the present invention, the first DC power module is an AC/DC conversion module, the second DC power module is a DC/DC conversion module, and the driving control circuit further includes an AC power input end and a DC power input end, where the AC power input end is connected to the first DC power module, and the DC power input end is connected to the second DC power module. In a similar way, the independence of the power supplies can be realized by adopting two independent power supplies of the direct-current power supply and the alternating-current power supply, and mutual interference generated in control is avoided.
Referring to fig. 8, in an embodiment of the present invention, the output terminal of the first dc power supply module is connected to the input terminal of the second dc power supply module. The first direct current power supply module and the second direct current power supply module form a series-connected common-ground direct current power supply, the voltages of the first direct current power supply module and the second direct current power supply module can be the same or different, and the first inversion module and the second inversion module are respectively used for controlling the operation of the motor.
Referring to fig. 9, in an embodiment of the present invention, the driving control circuit further includes an ac power input terminal, the first dc power module 300 includes a fifth switching tube Q5, a sixth switching tube Q6, a seventh switching tube Q7, an eighth switching tube Q8, a ninth switching tube Q9 and a third inductor L3, one end of the ac power input terminal is respectively connected to one end of the fifth switching tube Q5 and one end of the seventh switching tube Q7, the other end of the ac power input terminal is respectively connected to one end of the sixth switching tube Q6 and one end of the eighth switching tube Q8, the other end of the fifth switching tube Q5 and the other end of the sixth switching tube Q6 are both connected to one end of the third inductor L3 and one end of the ninth switching tube Q9, the other end of the third inductor L3 is used as the positive electrode of the output terminal of the first dc power module 300 and is connected to the positive electrode of the input terminal of the first inverter module, and the other end of the seventh switching tube Q7 is connected to the positive electrode of the seventh switching tube Q7, The other end of the eighth switching tube Q8 and the other end of the ninth switching tube Q9 are connected together to serve as the cathode of the output end of the first direct current power supply module 300 and connected to the cathode of the input end of the first inverter module; the second dc power supply module 400 is a boost chopper circuit, and includes a fourth inductor L4, a tenth switching tube Q10 and an eleventh switching tube Q11, the positive electrode of the output end of the first dc power supply module 300 is connected to one end of the fourth inductor L4, the other end of the fourth inductor L4 is connected to one end of the tenth switching tube Q10 and one end of the eleventh switching tube Q11, the other end of the tenth switching tube Q10 is connected to the positive electrode of the input end of the second inverter module 400, and the negative electrode of the output end of the first dc power supply module 300 is connected to the other end of the eleventh switching tube Q11 and the negative electrode of the input end of the second inverter module 400. The first dc power supply module 300 adopts a bridgeless Buck circuit 300 consisting of a fifth switching tube Q5, a sixth switching tube Q6, a seventh switching tube Q7, an eighth switching tube Q8, a ninth switching tube Q9 and a third inductor L3 to form a stable step-down dc power supply; the second dc power supply module 400 forms a stable boost dc power supply by using a boost chopper circuit composed of a fourth inductor L4, a tenth switching tube Q10, and an eleventh switching tube Q11; therefore, two series-connected direct current power supplies with different voltages are formed and respectively supplied to the first inversion module and the second inversion module.
Referring to fig. 10, in an embodiment of the present invention, the driving control circuit further includes an ac power supply access terminal and a rectifier bridge, the first dc power supply module is a buck chopper circuit 500, the second dc power supply module is a boost chopper circuit 600, the ac power supply access terminal is connected to an input terminal of the rectifier bridge, an output terminal of the rectifier bridge is connected to an input terminal of the buck chopper circuit 500, and an output terminal of the buck chopper circuit 500 is connected to an input terminal of the boost chopper circuit 600. An alternating current power supply is converted into direct current through a rectifier bridge, a first direct current power supply module forms a stable step-down direct current power supply by adopting a step-down chopper circuit 500, and a second direct current power supply module forms a stable step-up direct current power supply by adopting a step-up chopper circuit 600; therefore, two series-connected direct current power supplies with different voltages are formed and respectively supplied to the first inversion module and the second inversion module.
Referring to fig. 11, in an embodiment of the present invention, the driving control circuit further includes an ac power supply input terminal, the second dc power supply module 700 is a totem pole PFC circuit and includes a fifth inductor L5, a twelfth switching tube Q12, a thirteenth switching tube Q13, a fourteenth switching tube Q14 and a fifteenth switching tube Q15, one end of the ac power supply input terminal is connected to one end of the fifth inductor L5, the other end of the fifth inductor L5 is connected to one end of the twelfth switching tube Q12 and one end of the fourteenth switching tube Q14, the other end of the ac power supply input terminal is connected to one end of the thirteenth switching tube Q13 and one end of the fifteenth switching tube Q15, the other end of the twelfth switching tube Q12 and the other end of the thirteenth switching tube Q13 are connected together as an output terminal anode of the totem pole PFC circuit and connected to an input terminal of the second inverter module, the other end of the fourteenth switching tube Q14 and the other end of the fifteenth switching tube Q15 are connected together as a cathode of the totem pole PFC circuit and connected to an output terminal of the totem pole PFC circuit and connected The negative electrode of the input end of the inversion module; the first dc power supply module 800 is a buck chopper circuit, and the output terminal of the second dc power supply module is connected to the first inverter module through the buck chopper circuit. The second direct-current power supply module forms a stable boost direct-current power supply by adopting a totem pole PFC circuit consisting of a fifth inductor L5, a twelfth switching tube Q12, a thirteenth switching tube Q13, a fourteenth switching tube Q14 and a fifteenth switching tube Q15; the first direct-current power supply module forms a stable step-down direct-current power supply by adopting a step-down chopper circuit; therefore, two series-connected DC power supplies with different voltages and the same ground are formed and are respectively supplied to the first inverter module and the second inverter module. When the motor runs at a low speed, the switch assembly KY is closed, the motor is in a star-shaped connection state, the totem-pole PFC circuit and the buck chopper circuit work normally, the motor is controlled to run through the first inversion module, the output voltage of the buck chopper circuit can be adjusted in real time through the current rotating speed, and the running efficiency of the motor is further optimized. When the motor runs at a high speed, the switch assembly KY is opened, the motor is in an open winding connection state, the totem-pole PFC circuit and the buck chopper circuit work normally, the two direct-current power supplies control the motor to run through the first inversion module and the second inversion module respectively, the output voltages of the totem-pole PFC circuit and the buck chopper circuit can be adjusted in real time through the current rotating speed, and the running efficiency of the motor is further optimized.
Referring to fig. 12, a driving control method according to an embodiment of a second aspect of the present invention is applied to the driving control circuit shown in the embodiment of fig. 1, and includes the following steps:
s100: controlling the switching of the switching assembly to switch the three-phase winding between a star connection and an open winding connection;
s200: and controlling the first inversion module and the second inversion module to start or stop working so as to enable the first inversion module and the second inversion module to provide driving voltage for the three-phase winding in the corresponding connection state.
In this embodiment, the switching through control switch subassembly realizes that the connection state of three-phase winding switches, and begins or stop work through control first contravariant module and second contravariant module to the realization provides driving voltage and gives the three-phase winding under corresponding connection state, makes three-phase winding all can obtain suitable driving voltage when being in different connection state, in order to realize that the motor homoenergetic high-efficient operation is in different connection modes.
Specifically, referring to fig. 13, when the motor needs to be switched to the open-winding connection state for operation, the method includes the following steps:
s110: controlling the switch assembly to be opened so that the three-phase winding is switched to an open winding connection state;
s210: and controlling the first inversion module to work, and controlling the second inversion module to work so that the first inversion module provides a first driving voltage for the three-phase winding in the open winding connection state, and the second inversion module provides a second driving voltage for the three-phase winding in the open winding connection state.
The three-phase winding is switched to the open winding connection state by controlling the switch component to be opened, the first inversion module and the second inversion module are controlled to work, and first driving voltage and second driving voltage are respectively provided for the three-phase winding in the open winding connection state, so that the three-phase winding can obtain suitable driving voltage when being in the open winding connection state, and the motor can run efficiently in the open winding connection mode.
Specifically, referring to fig. 14, when the motor needs to be switched to the star connection state for operation, the method includes the following steps:
s120: controlling the switch assembly to be closed so that the three-phase winding is switched to a star connection state;
s220: and controlling the first inversion module to work, and controlling the second inversion module to stop working so as to enable the first inversion module to provide a first driving voltage for the three-phase winding in the star connection state.
Through the control switch subassembly closure, realize switching three-phase winding to star type connected state, and control first contravariant module work, realize providing first driving voltage to three-phase winding under the star type connected state for three-phase winding can obtain suitable driving voltage when being in star type connected state, still controls second contravariant module stop work in addition, thereby reduces the loss when star type connected state moves, can high-efficient operation with the realization motor star type connected mode.
Further, the second inversion module is controlled to provide a third driving voltage to the three-phase winding before the switching component acts, and the third driving voltage is a neutral point voltage of the three-phase winding in a star connection state. Through before the control switch subassembly is opened or is closed, control the second contravariant module earlier and provide third driving voltage to three-phase winding, can be so that control switch subassembly action back, the motor still can maintain steady operation, and it is smooth and easy to guarantee that the connection state switches, avoids the motor to receive voltage impact and produce when switching and pause to hinder or brake.
The following describes a drive control method of the drive control circuit with reference to a specific embodiment:
in a specific embodiment, referring to fig. 1 and fig. 15, when the motor first operates in the star connection state, the switch assembly KY is in the closed state, and both the first direct current power supply module and the first inverter module are in the operating state; if the three-phase winding needs to be switched to the open winding connection state, in the switching process, the second direct current power supply module and the second inversion module work firstly, the second inversion module simulates a neutral point voltage of the three-phase winding in the star connection state and outputs a third driving voltage to the three-phase winding, then the switch assembly KY is switched to the open state from the closed state, the second inversion module keeps simulating the neutral point voltage of the three-phase winding in the star connection state to maintain the stable operation of the motor, after the switch assembly KY is completely disconnected, the first inversion module and the second inversion module respectively provide the first driving voltage and the second driving voltage for the three-phase winding in the open winding connection state, so that the three-phase winding can obtain a proper driving voltage when in the open winding connection state, and the motor can operate efficiently in the open winding connection mode. The motor firstly works in an open winding connection state and needs to be switched to a star connection state, and the switching process is the reverse process of the above process, which is not described herein again.
In another specific embodiment, referring to fig. 4 and 16, when the motor operates in the star connection state first, the switching assembly KY is in the closed state, and the first inverter module and the buck chopper circuit composed of the first switching tube Q1, the second switching tube Q2 and the first inductor L1 are in the operating state; if the switching to the open winding connection state is required, in the switching process, the second inverter module and the boost chopper circuit composed of the second inductor L2, the third switching tube Q3 and the fourth switching tube Q4 work first, the second inversion module simulates neutral point voltage of the three-phase winding in a star connection state and outputs third driving voltage to the three-phase winding, then the switch component KY is switched from a closed state to an open state, the second inversion module keeps neutral point voltage of the analog three-phase winding in a star connection state, so as to maintain the stable operation of the motor, after the switch component KY is completely disconnected, the first inversion module and the second inversion module respectively provide a first driving voltage and a second driving voltage for the three-phase winding in the open winding connection state, the three-phase winding can obtain proper driving voltage when being in an open winding connection state, so that the motor can efficiently run in an open winding connection mode. The motor firstly works in an open winding connection state and needs to be switched to a star connection state, and the switching process is the reverse process of the above process, which is not described herein again.
In another specific embodiment, referring to fig. 9 and 17, when the motor operates in the star connection state first, the switch assembly KY is in the closed state, and both the first dc power module 300 and the first inverter module are in the operating state, where the first dc power module 300 is a bridgeless Buck circuit composed of a fifth switch tube Q5, a sixth switch tube Q6, a seventh switch tube Q7, an eighth switch tube Q8, a ninth switch tube Q9, and a third inductor L3; if the switching to the open winding connection state is required, in the switching process, the second dc power supply module 400 and the second inverter module work first, wherein the second dc power supply module 400 is a boost chopper circuit composed of a fourth inductor L4, a tenth switching tube Q10 and an eleventh switching tube Q11; the second inversion module simulates a neutral point voltage of a three-phase winding under a star connection state to output a third driving voltage to the three-phase winding, then the switch assembly KY is switched to an open state from a closed state, the second inversion module keeps simulating the neutral point voltage of the three-phase winding under the star connection state, so as to maintain stable operation of the motor, after the switch assembly KY is completely disconnected, the first inversion module and the second inversion module respectively provide a first driving voltage and a second driving voltage for the three-phase winding under the open winding connection state, so that the three-phase winding can obtain a suitable driving voltage when being in the open winding connection state, and the motor can efficiently operate in the open winding connection state. The motor firstly works in an open winding connection state and needs to be switched to a star connection state, and the switching process is the reverse process of the above process, which is not described herein again.
Embodiments of the third aspect of the present invention further provide a circuit board, including the drive control circuit provided in embodiments of the first aspect of the present invention. The function and principle of the circuit board of this embodiment are based on the above-mentioned driving control circuit, so the circuit board of this embodiment has the same function and principle as the above-mentioned driving control circuit, and for the sake of brevity, the description is not repeated here.
The fourth aspect embodiment of the present invention further provides an air conditioner, including the circuit board provided according to the second aspect embodiment of the present invention; alternatively, the first and second electrodes may be,
comprising at least one processor and a memory for communicative connection with the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the drive control method according to the embodiment of the third aspect of the present invention. The operation and principle of the air conditioner of this embodiment are based on the circuit board or the driving control method, and will not be repeated herein for saving space.
A computer storage medium according to an embodiment of the fifth aspect of the present invention stores computer-executable instructions for causing a computer to perform the drive control method according to the embodiment of the third aspect of the present invention. The operation and principle of the computer storage medium of this embodiment are based on the above-described drive control method, and will not be repeated herein for the sake of brevity.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (24)

1. A drive control circuit for driving an open-winding motor having three-phase windings, one end of each of the phases of the windings constituting a first three-phase outgoing line group, and the other end of each of the phases of the windings constituting a second three-phase outgoing line group, the drive control circuit comprising:
the switch assembly is connected with the second three-phase outlet line group; the switch assembly is closed, and the three-phase winding is switched into star connection; the switch assembly is switched on, and the three-phase winding is switched to be connected with an open winding;
the first inversion module is connected with the first three-phase outgoing line group and used for outputting a first driving voltage to the three-phase windings in a star connection state and a winding opening state;
the second inversion module is connected with the second three-phase outgoing line group and used for outputting a second driving voltage to the three-phase winding in the open winding connection state;
the first direct current power supply module is connected with the first inversion module and used for providing a first power supply voltage for the first inversion module;
and the second direct current power supply module is connected with the second inversion module and used for providing a second power supply voltage for the second inversion module.
2. The driving control circuit of claim 1, wherein the switch assembly comprises a first switch and a second switch, the second three-phase outgoing line set comprises a first terminal, a second terminal and a third terminal, the first switch is connected to the first terminal and the second terminal, respectively, and the second switch is connected to the second terminal and the third terminal, respectively.
3. The driving control circuit of claim 1, wherein the switch assembly comprises a third switch, a fourth switch and a fifth switch, the second three-phase outgoing line set comprises a first terminal, a second terminal and a third terminal, one terminal of the third switch is connected to the first terminal, one terminal of the fourth switch is connected to the second terminal, one terminal of the fifth switch is connected to the third terminal, and the other terminal of the third switch, the other terminal of the fourth switch and the other terminal of the fifth switch are shorted.
4. The driving control circuit according to claim 1, wherein a first capacitor is further connected between the first dc power supply module and the first inverter module; and a second capacitor is also connected between the second direct current power supply module and the second inversion module.
5. The driving control circuit according to claim 1, further comprising an ac power input terminal and a rectifier bridge, wherein the ac power input terminal is connected to the rectifier bridge, and an output terminal of the rectifier bridge is connected to the first dc power module and the second dc power module, respectively.
6. The driving control circuit according to claim 5, wherein the first DC power supply module is a step-down circuit, and the second DC power supply module is a step-up circuit.
7. The drive control circuit according to claim 6, wherein the step-down circuit is a step-down chopper circuit, and the step-up circuit is a step-up chopper circuit.
8. The driving control circuit according to claim 7, wherein the buck chopper circuit includes a first switch tube, a second switch tube, and a first inductor, an output anode of the rectifier bridge is connected to one end of the first switch tube, another end of the first switch tube is respectively connected to one end of the second switch tube and one end of the first inductor, another end of the first inductor is connected to an input anode of the first inverter module, and an output cathode of the rectifier bridge is respectively connected to another end of the second switch tube and an input cathode of the first inverter module.
9. The driving control circuit according to claim 7, wherein the boost chopper circuit includes a second inductor, a third switch tube and a fourth switch tube, an output end anode of the rectifier bridge is connected to one end of the second inductor, the other end of the second inductor is respectively connected to one end of the third switch tube and one end of the fourth switch tube, the other end of the third switch tube is connected to an input end anode of the second inverter module, and an output end cathode of the rectifier bridge is respectively connected to the other end of the fourth switch tube and an input end cathode of the second inverter module.
10. The drive control circuit according to claim 1, wherein the first DC power supply module and the second DC power supply module are both AC/DC conversion modules, and the drive control circuit further comprises a first AC power supply input terminal and a second AC power supply input terminal, the first AC power supply input terminal is connected to the first DC power supply module, and the second AC power supply input terminal is connected to the second DC power supply module.
11. The driving control circuit according to claim 1, wherein the first DC power module and the second DC power module are both AC/DC conversion modules and are isolated from each other, and the driving control circuit further comprises an AC power input terminal, and the AC power input terminal is connected to the first DC power module and the second DC power module respectively.
12. The drive control circuit according to claim 1, wherein the first DC power supply module is an AC/DC conversion module, the second DC power supply module is a DC/DC conversion module, and the drive control circuit further comprises an AC power supply input terminal and a DC power supply input terminal, the AC power supply input terminal is connected to the first DC power supply module, and the DC power supply input terminal is connected to the second DC power supply module.
13. The driving control circuit according to claim 1, wherein the output terminal of the first dc power supply module is connected to the input terminal of the second dc power supply module.
14. The driving control circuit according to claim 13, wherein the driving control circuit further comprises an ac power supply input terminal, the first dc power supply module comprises a fifth switching tube, a sixth switching tube, a seventh switching tube, an eighth switching tube, a ninth switching tube and a third inductor, one end of the ac power supply input terminal is connected to one end of the fifth switching tube and one end of the seventh switching tube respectively, the other end of the ac power supply input terminal is connected to one end of the sixth switching tube and one end of the eighth switching tube respectively, the other end of the fifth switching tube and the other end of the sixth switching tube are connected to one end of the third inductor and one end of the ninth switching tube respectively, the other end of the third inductor serves as an output terminal anode of the first dc power supply module, and the other end of the seventh switching tube, The other end of the eighth switching tube and the other end of the ninth switching tube are connected together to serve as the cathode of the output end of the first direct-current power supply module; and the second direct-current power supply module is a boost chopper circuit.
15. The driving control circuit according to claim 13, further comprising an ac power supply input terminal and a rectifier bridge, wherein the first dc power supply module is a buck chopper circuit, the second dc power supply module is a boost chopper circuit, the ac power supply input terminal is connected to an input terminal of the rectifier bridge, an output terminal of the rectifier bridge is connected to an input terminal of the buck chopper circuit, and an output terminal of the buck chopper circuit is connected to an input terminal of the boost chopper circuit.
16. The driving control circuit according to claim 1, further comprising an ac power supply input terminal, wherein the second dc power supply module is a totem-pole PFC circuit, the first dc power supply module is a buck chopper circuit, the ac power supply input terminal is connected to an input terminal of the totem-pole PFC circuit, and an output terminal of the totem-pole PFC circuit is connected to an input terminal of the buck chopper circuit.
17. The driving control circuit as claimed in claim 16, wherein the totem-pole PFC circuit comprises a fifth inductor, a twelfth switching tube, a thirteenth switching tube, a fourteenth switching tube and a fifteenth switching tube, one end of the alternating current power supply access end is connected with one end of the fifth inductor, the other end of the fifth inductor is connected with one end of the twelfth switching tube and one end of the fourteenth switching tube, the other end of the alternating current power supply access end is connected with one end of the thirteenth switching tube and one end of the fifteenth switching tube, the other end of the twelfth switching tube and the other end of the thirteenth switching tube are connected together to be used as the anode of the output end of the totem pole PFC circuit, the other end of the fourteenth switching tube and the other end of the fifteenth switching tube are connected together to serve as the cathode of the output end of the totem-pole PFC circuit.
18. A drive control method applied to a drive control circuit for driving an open-winding motor having three-phase windings, one end of each of the phases of the windings constituting a first three-phase outgoing line group, the other end of each of the phases of the windings constituting a second three-phase outgoing line group, the drive control circuit comprising:
the switch assembly is connected with the second three-phase outlet line group; the switch assembly is closed, and the three-phase winding is switched into star connection; the switch assembly is switched on, and the three-phase winding is switched to be connected with an open winding;
the first inversion module is connected with the first three-phase outgoing line group;
the second inversion module is connected with the second three-phase outgoing line group;
the first direct current power supply module is connected with the first inversion module;
the second direct current power supply module is connected with the second inversion module;
the method comprises the following steps:
controlling the switching of the switching assembly to switch the three-phase winding between a star connection and an open winding connection;
and controlling the first inversion module and the second inversion module to start or stop working so as to enable the first inversion module and the second inversion module to provide driving voltage for the three-phase winding in the corresponding connection state.
19. The drive control method according to claim 18, characterized in that:
the controlling of the opening and closing of the switching assembly to switch the three-phase winding between a star connection state and an open winding connection state includes:
controlling the switch assembly to be opened so that the three-phase winding is switched to an open winding connection state;
the controlling the first inverter module and the second inverter module to start or stop working so that the first inverter module and the second inverter module provide driving voltages to the three-phase windings in corresponding connection states includes:
and controlling the first inversion module to work, and controlling the second inversion module to work so that the first inversion module provides a first driving voltage for the three-phase winding in the open winding connection state, and the second inversion module provides a second driving voltage for the three-phase winding in the open winding connection state.
20. The drive control method according to claim 18, characterized in that:
the controlling of the opening and closing of the switching assembly to switch the three-phase winding between a star connection state and an open winding connection state includes:
controlling the switch assembly to be closed so that the three-phase winding is switched to a star connection state;
the controlling the first inverter module and the second inverter module to start or stop working so that the first inverter module and the second inverter module provide driving voltages to the three-phase windings in corresponding connection states includes:
and controlling the first inversion module to work, and controlling the second inversion module to stop working so as to enable the first inversion module to provide a first driving voltage for the three-phase winding in the star connection state.
21. The drive control method according to claim 18, characterized in that:
and controlling the second inversion module to provide a third driving voltage to the three-phase winding before the switch component acts, wherein the third driving voltage is a neutral point voltage of the three-phase winding in a star connection state.
22. A wiring board characterized by comprising the drive control circuit according to any one of claims 1 to 17.
23. An air conditioner, comprising the wiring board of claim 22;
alternatively, the first and second electrodes may be,
comprising at least one processor and a memory for communicative connection with the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a drive control method according to any one of claims 18 to 21.
24. A computer storage medium storing computer-executable instructions for causing a computer to perform the drive control method according to any one of claims 18 to 21.
CN202010301191.0A 2020-04-16 2020-04-16 Drive control circuit, drive control method, circuit board and air conditioner Pending CN111355423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010301191.0A CN111355423A (en) 2020-04-16 2020-04-16 Drive control circuit, drive control method, circuit board and air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010301191.0A CN111355423A (en) 2020-04-16 2020-04-16 Drive control circuit, drive control method, circuit board and air conditioner

Publications (1)

Publication Number Publication Date
CN111355423A true CN111355423A (en) 2020-06-30

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Application Number Title Priority Date Filing Date
CN202010301191.0A Pending CN111355423A (en) 2020-04-16 2020-04-16 Drive control circuit, drive control method, circuit board and air conditioner

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113193770A (en) * 2021-05-08 2021-07-30 Oppo广东移动通信有限公司 Power supply device, power adapter, and power supply device control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113193770A (en) * 2021-05-08 2021-07-30 Oppo广东移动通信有限公司 Power supply device, power adapter, and power supply device control method
CN113193770B (en) * 2021-05-08 2022-12-13 Oppo广东移动通信有限公司 Power supply device, power adapter, and power supply device control method

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