CN111355418A - 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
CN111355418A
CN111355418A CN202010300084.6A CN202010300084A CN111355418A CN 111355418 A CN111355418 A CN 111355418A CN 202010300084 A CN202010300084 A CN 202010300084A CN 111355418 A CN111355418 A CN 111355418A
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China
Prior art keywords
circuit
voltage
phase
power supply
phase winding
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Granted
Application number
CN202010300084.6A
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Chinese (zh)
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CN111355418B (en
Inventor
龙谭
时崎久
黄招彬
赵鸣
文先仕
曾贤杰
张杰楠
徐锦清
胡斌
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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Priority to CN202010300084.6A priority Critical patent/CN111355418B/en
Publication of CN111355418A publication Critical patent/CN111355418A/en
Application granted granted Critical
Publication of CN111355418B publication Critical patent/CN111355418B/en
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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
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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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 is used for driving an open winding motor with a three-phase winding, and comprises the following steps: the driving circuit is connected with the three-phase winding; the first direct current power supply and the second direct current power supply are provided with a first voltage output end and a second voltage output end; and the switch component is connected with the first direct-current power supply, the second direct-current power supply and the driving circuit and is used for enabling the driving circuit to be communicated with the first voltage output end or the second voltage output end according to the running state of the motor. The invention can select and connect different voltage output ends by controlling the switch component according to the running state of the motor and the proper motor voltage corresponding to each running state, so that the driving circuit obtains different input voltages, and the voltage of the motor and the running state of the motor achieve better matching effect, therefore, the invention can improve the medium and low frequency running efficiency of the motor and ensure the high-frequency stable running of the motor.

Description

Drive control circuit, drive control method, circuit board and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a drive control circuit, a drive control method, a circuit board and an air conditioner.
Background
The inverter compressor of the existing inverter air conditioner mostly adopts a permanent magnet motor as a driving motor, the motor is controlled to work through a driving control circuit, so that the motor runs in different wiring states or different rotating speeds, in order to ensure that the motor can stably run in a high-speed state, the input voltage is designed according to the high-speed running state of the motor, because the loss of the motor can be influenced by the input voltage of the driving control circuit, when the motor runs in a low-speed state, the loss of the motor or the driving control circuit can be increased, and the running efficiency of the motor is influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a drive control circuit, a drive control method, a circuit board, an air conditioner and a computer readable storage medium, which can improve the medium and low frequency operation efficiency of a motor and ensure the high frequency stable operation of the motor.
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, the motor including the three-phase windings, includes:
a drive circuit connected to the three-phase winding;
the power supply comprises a first direct current power supply and a second direct current power supply, wherein the first direct current power supply is provided with a first voltage output end, and the second direct current power supply is provided with a second voltage output end;
and the switch component is respectively connected with the first direct-current power supply and the second direct-current power supply and the drive circuit and is used for enabling the drive circuit to be communicated with the first voltage output end or the second voltage output end according to the running state of the motor.
The drive control circuit according to the embodiment of the invention has at least the following beneficial effects: the drive control circuit of the embodiment of the invention can be used for controlling the motor to run according to the running state of the motor, such as: the motor speed, the motor frequency or the connection state of the three-phase winding can be selected and connected with different voltage output ends by controlling the switch component according to the appropriate motor voltage corresponding to each operation state, so that the driving circuit obtains different input voltages, and the voltage of the motor and the operation state of the motor can achieve a better matching effect.
According to some embodiments of the present invention, further comprising an alternating current power supply, a rectifying circuit, a voltage step-up circuit, and a voltage step-down circuit, the alternating current power supply being connected to the voltage step-up circuit and the voltage step-down circuit through the rectifying circuit, respectively, the voltage step-up circuit being connected to the first voltage output terminal, the voltage step-down circuit being connected to the second voltage output terminal, the first direct current power supply comprising the alternating current power supply, the rectifying circuit, and the voltage step-up circuit, and the second direct current power supply comprising the alternating current power supply, the rectifying circuit, and the voltage step-down circuit.
According to some embodiments of the invention, the dc chopper circuit is further included, and the first dc power supply and the second dc power supply are connected to each other through the dc chopper circuit.
According to some embodiments of the invention, the switch member is a single pole double throw switch comprising a fixed contact, a first movable contact and a second movable contact, the fixed contact of the single pole double throw switch being connected to the drive circuit, the first movable contact of the single pole double throw switch being connected to the first voltage output, the second movable contact of the single pole double throw switch being connected to the second voltage output.
According to some embodiments of the invention, the switching component comprises a first input terminal, a second input terminal, a first switching device, a second switching device, and a first output terminal, the first input terminal is connected to the first voltage output terminal, the second input terminal is connected to the second voltage output terminal, the first output terminal is connected to the driving circuit, the first input terminal is connected to the first output terminal through the first switching device, and the second input terminal is connected to the first output terminal through the second switching device.
According to some embodiments of the invention, the driving circuit includes a first inverter circuit through which the switching part is connected to the three-phase winding.
According to some embodiments of the present invention, the driving circuit further includes a first switch group, one end of each of the windings constitutes a first three-phase outgoing line group, the other end of each of the windings constitutes a second three-phase outgoing line group, the second three-phase outgoing line group is connected to the first inverter circuit, and the first three-phase outgoing line group is connected to the first switch group; the first switch group is closed, and the three-phase winding is switched to be in star connection.
According to some embodiments of the present invention, the driving circuit further includes a second inverter circuit, and the switching part is further connected to the first three-phase outgoing line phase through the second inverter circuit; the first switch group is disconnected, and the three-phase winding is switched to be connected with the open winding.
According to some embodiments of the present invention, the driving circuit further includes a second switch group connected to the first three-phase outgoing line group and the second three-phase outgoing line group, respectively; the first switch group is disconnected, the second switch group is closed, and the three-phase winding is switched into triangular connection.
According to some embodiments of the present invention, the driving circuit further includes a second switch group, a second inverter circuit, and a fourth capacitor, the second switch group is respectively connected to the first three-phase outgoing line group and the second three-phase outgoing line group, the first switch group is disconnected, the second switch group is closed, the three-phase windings are switched to be in delta connection, and the second inverter circuit is connected to the first three-phase outgoing line and is further connected to the fourth capacitor in parallel.
According to some embodiments of the invention, the operating state of the electric machine comprises at least one of:
the connection state of the three-phase winding;
the speed or frequency of the motor.
A drive control method according to an embodiment of a second aspect of the present invention is applied to a drive control circuit for driving an open-winding motor having three-phase windings, the motor including the three-phase windings, the drive control circuit including:
a drive circuit connected to the three-phase winding;
the power supply comprises a first direct current power supply and a second direct current power supply, wherein the first direct current power supply is provided with a first voltage output end, and the second direct current power supply is provided with a second voltage output end;
a switch unit connected to the first dc power supply, the second dc power supply, and the driving circuit, respectively;
the drive control method includes:
acquiring the running state of the motor;
and controlling the switch component according to the running state to enable the driving circuit to be communicated with the first voltage output end or the second voltage output end.
The drive control method according to the embodiment of the invention has at least the following beneficial effects: the drive control method of the embodiment of the invention can be used for controlling the motor according to the running state of the motor, such as: the motor speed, the motor frequency or the connection state of the three-phase winding can be selected and connected with different voltage output ends by controlling the switch component according to the appropriate motor voltage corresponding to each operation state, so that the driving circuit obtains different input voltages, and the voltage of the motor and the operation state of the motor can achieve a better matching effect.
According to some embodiments of the invention, the obtaining the operational state of the motor comprises: acquiring the connection state of the three-phase winding;
correspondingly, the controlling the switch component to enable the driving circuit to connect the first voltage output end or the second voltage output end according to the operating state includes: and enabling the driving circuit to be communicated with the first voltage output end or the second voltage output end according to the connection state of the three-phase winding.
According to some embodiments of the invention, the connection state of the three-phase winding comprises: and switching between any two connection states of a star connection state, a delta connection state and an open winding state.
According to some embodiments of the invention, the obtaining the operational state of the motor comprises: acquiring the rotating speed of the motor;
correspondingly, the controlling the switch component to enable the driving circuit to connect the first voltage output end or the second voltage output end according to the operating state includes: and enabling the driving circuit to be communicated with the first voltage output end or the second voltage output end according to the rotating speed of the motor.
According to some embodiments of the invention, the connecting the driving circuit to the first voltage output end or the second voltage output end according to the rotation speed of the motor comprises at least one of:
when the rotating speed of the motor reaches a preset first rotating speed threshold value in the rising process, controlling the switch component to enable the driving circuit to be communicated with the first voltage output end;
and when the rotating speed of the motor reaches a preset second rotating speed threshold value in the reducing process, controlling the switch component to enable the driving circuit to be communicated with the second voltage output end.
According to some embodiments of the invention, the controlling the switching component to connect the driving circuit to the first voltage output terminal or the second voltage output terminal according to the operation state comprises:
according to the running state, controlling the switch component to enable the driving circuit to be switched from being communicated with the first direct-current power supply to being communicated with the second direct-current power supply;
correspondingly, the controlling the switch component to switch the driving circuit from being connected with the first direct-current power supply to being connected with the second direct-current power supply comprises:
controlling the first direct current power supply and the second direct current power supply to be adjusted to a switching state at a first moment;
at a second moment, controlling the switch component to disconnect the first voltage output end from the driving circuit, and controlling the switch component to connect the second voltage output end with the driving circuit;
and at the third moment, controlling the first direct current power supply to be closed, and controlling the second direct current power supply to enter a working state.
According to some embodiments of the invention, the switch component is a single pole double throw switch comprising a fixed contact, a first movable contact and a second movable contact, the fixed contact of the single pole double throw switch being connected to the drive circuit, the first movable contact of the single pole double throw switch being connected to the first voltage output, the second movable contact of the single pole double throw switch being connected to the second voltage output;
the controlling the switch component to enable the driving circuit to connect the first voltage output end or the second voltage output end according to the operation state comprises:
connecting the fixed contact to the first movable contact or the second movable contact according to the operating state.
According to some embodiments of the present invention, the switching part includes a first input terminal connected to the first voltage output terminal, a second input terminal connected to the second voltage output terminal, a first switching device, a second switching device, and a first output terminal connected to the driving circuit, the first input terminal is connected to the first output terminal through the first switching device, the second input terminal is connected to the first output terminal through the second switching device;
the controlling the switch component to enable the driving circuit to connect the first voltage output end or the second voltage output end according to the operation state comprises:
turning on the first switching device or the second switching device according to the operation state.
According to some embodiments of the present invention, the driving circuit includes a first inverter circuit, a first switch group, and a second inverter circuit, one end of the winding of each phase constitutes a first three-phase outgoing line group, the other end of the winding of each phase constitutes a second three-phase outgoing line group, the switch component is connected to the second three-phase outgoing line group through the first inverter circuit, and the switch component is further connected to the first three-phase outgoing line phase through the second inverter circuit and the first switch group in sequence; the first switch group is closed, and the three-phase winding is switched into star connection; the first switch group is disconnected, and the three-phase winding is switched to be connected with an open winding;
the drive control method further includes:
controlling the first inverter circuit to start working, and controlling the second inverter circuit to stop working, so that the first inverter circuit provides a first driving voltage for the three-phase winding in the star connection state;
and controlling the first inverter circuit and the second inverter circuit to start working so that the first inverter circuit provides a second driving voltage for the three-phase winding in an open winding connection state, and the second inverter circuit provides a third driving voltage for the three-phase winding in the open winding connection state.
According to some embodiments of the present invention, the driving circuit further includes a second switch group connected to the first three-phase outgoing line group and the second three-phase outgoing line group, respectively; the first switch group is disconnected, the second switch group is closed, and the three-phase winding is switched into triangular connection;
the drive control method further includes:
and controlling the first inverter circuit to start working and controlling the second inverter circuit to stop working so that the first inverter circuit provides a fourth driving voltage for the three-phase winding in the delta connection state.
According to some embodiments of the invention, the drive control method further comprises:
and controlling the second inverter circuit to provide a fifth driving voltage to the three-phase winding in the switching process, wherein the fifth driving voltage is a neutral point voltage of the three-phase winding in a star connection state, or a three-phase voltage of the three-phase winding in a delta connection state.
According to some embodiments of the present invention, the driving circuit includes a first inverter circuit, a first switch group, a second inverter circuit, and a fourth capacitor, one end of each of the phases of the winding forms a first three-phase outgoing line group, the other end of each of the phases of the winding forms a second three-phase outgoing line group, the switch component is connected to the second three-phase outgoing line group through the first inverter circuit, the second switch group is connected to the first three-phase outgoing line group and the second three-phase outgoing line group, respectively, the second inverter circuit is connected to the first three-phase outgoing line through the first switch group, and the second inverter circuit is further connected to the fourth capacitor in parallel; the first switch group is closed, the three-phase winding is switched to be in star connection, the first switch group is disconnected, the second switch group is closed, and the three-phase winding is switched to be in delta connection;
the drive control method further includes:
controlling the first inverter circuit to start working so that the first inverter circuit provides a sixth driving voltage for the three-phase winding in the star connection state;
and controlling the first inverter circuit to start working so that the first inverter circuit provides seventh driving voltage for the three-phase winding in the delta connection state.
According to some embodiments of the invention, the drive control method further comprises:
and controlling the second inverter circuit to provide a fifth driving voltage to the three-phase winding in the switching process, wherein the fifth driving voltage is a neutral point voltage of the three-phase winding in a star connection state, or a three-phase voltage of the three-phase winding in a delta connection state.
According to some embodiments of the invention, the controlling the second inverter circuit to provide a fifth driving voltage to the three-phase winding during switching includes:
the three-phase winding keeps star connection, and the second inverter circuit is controlled to output neutral point voltage of the three-phase winding in a star connection state;
the first switch group is controlled to be disconnected, the second inverter circuit outputs neutral point voltage of the three-phase winding in a star connection state, and the neutral point voltage lasts for a first time threshold value;
controlling the second inverter circuit to output three-phase voltage of the three-phase winding in a triangular connection state;
and controlling the second switch group to be closed, and outputting the three-phase voltage of the three-phase winding in the triangular connection state by the second inverter circuit for a second time threshold.
According to some embodiments of the invention, the controlling the second inverter circuit to provide a fifth driving voltage to the three-phase winding during switching includes:
the three-phase windings are in triangular connection, and the second inverter circuit is controlled to output three-phase voltage of the three-phase windings in a triangular connection state;
the second switch group is controlled to be disconnected, and the second inverter circuit outputs three-phase voltage of the three-phase winding in a triangular connection state for a second time threshold value;
controlling the second inverter circuit to output neutral point voltage of the three-phase winding in a star connection state;
and controlling the first switch group to be closed, and outputting the neutral point voltage of the three-phase winding in the star connection state by the second inverter circuit for a first time threshold.
A wiring board according to an embodiment of the third aspect of the present invention includes the drive control circuit as described above.
The circuit board provided by the embodiment of the invention at least has the following beneficial effects: the circuit board of the embodiment of the invention can be used for processing the following steps according to the running state of the motor, such as: the motor speed, the motor frequency or the connection state of the three-phase winding can be selected and connected with different voltage output ends by controlling the switch component according to the appropriate motor voltage corresponding to each operation state, so that the driving circuit obtains different input voltages, and the voltage of the motor and the operation state of the motor can achieve a better matching effect.
An air conditioner according to a fourth aspect of the present invention includes the wiring board as described above; or, 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 as described above.
The air conditioner provided by the embodiment of the invention has at least the following beneficial effects: the air conditioner provided by the embodiment of the invention can be used for controlling the air conditioner according to the running state of the motor, such as: the motor speed, the motor frequency or the connection state of the three-phase winding can be selected and connected with different voltage output ends by controlling the switch component according to the appropriate motor voltage corresponding to each operation state, so that the driving circuit obtains different input voltages, and the voltage of the motor and the operation state of the motor can achieve a better matching effect.
According to a fifth aspect of the present invention, there is provided a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the drive control method as described above.
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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of a driving control circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a driving control circuit according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of a driving control circuit according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of a driving control circuit according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a driving control circuit according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a driving control circuit according to another embodiment of the present invention;
FIG. 7 is a diagram of a driving control circuit according to another embodiment of the present invention;
FIG. 8 is a diagram of a driving control circuit according to another embodiment of the present invention;
FIG. 9 is a schematic diagram of a driving control circuit according to another embodiment of the present invention;
FIG. 10 is a diagram of a driving control circuit according to another embodiment of the present invention;
FIG. 11 is a diagram of a driving control circuit according to another embodiment of the present invention;
fig. 12 is a schematic diagram of a driving control method according to an embodiment of the present invention;
fig. 13 is a schematic diagram of a driving control method according to another embodiment of the present invention;
fig. 14 is a schematic diagram of a driving control method according to another embodiment of the present invention;
fig. 15 is a schematic diagram of a driving control method according to another embodiment of the present invention;
fig. 16 is a schematic diagram of a driving control method according to another embodiment of the present invention;
FIG. 17 is a schematic diagram illustrating a switching relationship between a rotational speed of a motor and a DC power source according to an embodiment of the present invention;
fig. 18 is a schematic diagram of a driving control method according to another embodiment of the present invention;
FIG. 19 is a diagram illustrating a state process for switching from the second DC power source to the first DC power source according to an embodiment of the present invention;
fig. 20 is a diagram illustrating a state process of switching from a first dc power supply to a second dc power supply according to another embodiment of the present invention;
fig. 21 is a schematic diagram of a driving control method according to another embodiment of the present invention;
fig. 22 is a schematic diagram of a driving control method according to another embodiment of the present invention;
fig. 23 is a schematic diagram of a driving control method according to another embodiment of the present invention;
fig. 24 is a schematic diagram of a driving control method according to another embodiment of the present invention;
fig. 25 is a schematic diagram of a driving control method according to another embodiment of the present invention;
fig. 26 is a schematic diagram of a driving control method according to another embodiment of the present invention;
fig. 27 is a schematic diagram of a driving control method according to another embodiment of the present invention;
fig. 28 is a schematic diagram of a driving control method according to another embodiment of the present invention;
fig. 29 is a schematic diagram of a driving control method according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
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.
At present, the inverter compressor of the existing inverter air conditioner mostly adopts a permanent magnet motor as a driving motor, the motor is controlled to work by a driving control circuit, so that the motor runs in different wiring states or different rotating speeds, in order to ensure that the motor can stably run in a high-speed state, the input voltage is designed according to the high-speed running state of the motor, because the motor loss can be influenced by the input voltage of the driving control circuit, when the motor runs in a low-speed state, the loss of the motor or the driving control circuit can be increased, and the running efficiency of the motor is influenced. The conventional inverter air conditioner generally uses a passive PFC (powerfactory correction), a single-pulse or multi-pulse active PFC (Boost chopper) and other power factor correction circuits to control an input voltage, and the active PFC is generally a Boost topology circuit structure. The passive PFC has no input voltage regulation function, while the active PFC of the Boost structure can only carry out Boost regulation and cannot carry out buck control.
Based on the above, the invention provides a drive control circuit, a drive control method, a circuit board, an air conditioner and a computer readable storage medium, which can enable the drive circuit to access different input voltages according to the running state of the motor and the appropriate motor voltage corresponding to each running state, so that the voltage of the motor and the running state of the motor can achieve a better matching effect, the damage of the motor or the drive control circuit can be reduced, and the running efficiency of the motor can be ensured.
The embodiments of the present invention will be further explained with reference to the drawings.
As shown in fig. 1, fig. 1 is a schematic diagram of a driving control circuit according to an embodiment of the present invention. The driving control circuit is used for driving an open winding motor 400 having three-phase windings 410, and includes a driving circuit 300, a first direct current power supply 110, a second direct current power supply 120, and a switching part 200; wherein, the driving circuit 300 is connected with the three-phase winding 410; the first dc power supply 110 is provided with a first voltage output terminal, and the second dc power supply 120 is provided with a second voltage output terminal; the switching part 200 is connected to the first dc power supply 110, the second dc power supply 120, and the driving circuit 300, respectively, for connecting the driving circuit 300 to the first voltage output terminal or the second voltage output terminal according to the operation state of the motor 400.
In one embodiment, during operation, the switching component 200 selects different voltage outputs and thus different dc power sources to power the driving circuit 300, and then the driving circuit 300 drives the three-phase winding 410 to operate the motor 400. During operation, embodiments of the present invention can be used to determine the operating state of the motor 400, such as: the motor rotation speed, the motor frequency or the connection state of the three-phase winding can be selected and connected with different voltage output ends by controlling the switch component 200 according to the suitable motor 400 voltage corresponding to each operation state, so that the driving circuit 300 is communicated with different voltage output ends to obtain different input voltages, and the voltage of the motor 400 and the operation state of the motor 400 can achieve a better matching effect, wherein the different connection states of the three-phase winding correspond to different suitable operation frequencies of the motor 400, and the different rotation speeds of the motor 400 correspond to different frequencies of the motor 400, so that the embodiment of the invention can select different input voltages according to the operation state of the motor 400, thereby improving the middle and low frequency operation efficiency of the motor 400 and ensuring the high-frequency stable operation of the motor 400.
The operation state of motor 400 may be the connection state of three-phase winding 410, the rotation speed or frequency of motor 400, or both of them. It can be understood that the connection states of the three-phase windings 410 include a star connection state, a delta connection state, and an open winding connection state, where the open winding state refers to that the neutral point of the three-phase windings 410 of the conventional motor 400 is opened, one end of the three-phase windings is connected to the inverter, and the other end of the three-phase windings can be connected to the inverter or other switching devices for star and delta driving control, so as to form a novel topology structure of the motor 400 system with double-end power supply.
It is understood that, regarding the connection states of the three-phase winding 410, the suitable input voltages corresponding to each connection state of the three-phase winding 410 are different accordingly. For example, when the three-phase winding 410 is switched from the open winding state to the delta connection state or from the delta state to the star connection state, the voltage required by the three-phase winding 410 may be decreased accordingly, and therefore, in order to ensure that the voltage of the three-phase winding 410 and the connection state of the three-phase winding 410 achieve a better matching effect and no loss is caused, the switching component 200 may be controlled to connect the driving circuit 300 to the corresponding voltage output terminal with a lower voltage. On the contrary, when the three-phase winding 410 is switched from the star connection state to the delta connection state or from the delta state to the open winding state, the voltage required by the three-phase winding 410 may be increased accordingly, and therefore, in order to ensure that the voltage of the three-phase winding 410 and the connection state of the three-phase winding 410 achieve a better matching effect and no loss is caused, the driving circuit 300 may be connected to the corresponding voltage output terminal with a higher voltage by controlling the switch component 200. Therefore, different input voltages can be obtained by switching to different voltage output terminals, so that the voltage of the three-phase winding 410 and the connection state of the three-phase winding 410 can achieve a better matching effect, damage to the motor 400 or the drive control circuit can be reduced, and the operating efficiency of the motor 400 can be ensured.
In addition, the rotation speed and the frequency of the motor 400 substantially correspond to each other, and the suitable input voltages corresponding to different rotation speeds or frequencies of the motor 400 are different from each other. For example, when the target rotation speed required by the motor 400 is reduced, the voltage required by the three-phase winding 410 may be reduced accordingly, and therefore, in order to ensure that the voltage of the three-phase winding 410 and the rotation speed of the motor 400 achieve a better matching effect and cause no loss, the switching component 200 may be controlled to connect the driving circuit 300 to the corresponding voltage output terminal with a lower voltage. On the contrary, when the target rotation speed required by the motor 400 is increased, the voltage required by the three-phase winding 410 may be increased accordingly, and therefore, in order to ensure that the voltage of the three-phase winding 410 and the rotation speed of the motor 400 achieve a better matching effect and cause no loss, the driving circuit 300 may be connected to the corresponding voltage output terminal with higher voltage by controlling the switching component 200. Therefore, different input voltages can be obtained by switching to different voltage output ends, so that the voltage of the three-phase winding 410 and the rotating speed of the motor 400 can achieve a better matching effect, the damage of the motor 400 or a driving control circuit can be reduced, and the operating efficiency of the motor 400 can be ensured.
It should be noted that the range of the voltage amplitude that each voltage output terminal can output is different.
In addition, it can be understood that the first dc power supply 110 and the second dc power supply 120 may respectively provide dc voltages with different voltage amplitudes, and when the voltage value required by the three-phase winding 410 falls within the range of the voltage amplitude that can be provided by the first dc power supply 110, the switching component 200 may be controlled to connect the driving circuit 300 to the first voltage output terminal, so that the driving circuit 300 turns on the first dc power supply 110, and the driving circuit 300 further inverts the input voltage and then transmits the inverted input voltage to the three-phase winding 410. Conversely, when the voltage value required by the three-phase winding 410 falls within the range of the voltage amplitude that can be provided by the second dc power supply 120, the switch component 200 may be controlled to connect the driving circuit 300 and the second voltage output terminal, so that the driving circuit 300 is connected to the second dc power supply 120, and the driving circuit 300 performs the inversion processing on the input voltage and then transmits the input voltage to the three-phase winding 410. Therefore, by switching to the first dc power supply 110 or the second dc power supply 120, different input voltages can be obtained, so that the voltage of the three-phase winding 410 and the operation state of the motor 400 can achieve a better matching effect, thereby reducing damage to the motor 400 or the driving control circuit and ensuring the operation efficiency of the motor 400.
As shown in fig. 2, fig. 2 is a schematic diagram of a driving control circuit according to another embodiment of the present invention. The drive control circuit further includes an alternating current power supply 111, a rectifying circuit 112, a voltage boosting circuit 113 and a voltage reducing circuit 114, the alternating current power supply 111 is connected to the voltage boosting circuit 113 and the voltage reducing circuit 114 through the rectifying circuit 112 respectively, the voltage boosting circuit 113 is connected to a first voltage output terminal, the voltage reducing circuit 114 is connected to a second voltage output terminal, the first direct current power supply 110 includes the alternating current power supply 111, the rectifying circuit 112 and the voltage boosting circuit 113, and the second direct current power supply 120 includes the alternating current power supply 111, the rectifying circuit 112 and the voltage reducing circuit 114.
In an embodiment, the first dc power supply 110 may be formed by the ac power supply 111, the rectifying circuit 112 and the voltage boost circuit 113, and the second dc power supply 120 may be formed by the ac power supply 111, the rectifying circuit 112 and the voltage step-down circuit 114, for the switching manner and the corresponding technical effect between the first dc power supply 110 and the second dc power supply 120 according to the embodiment of the present invention, reference may be made to the above embodiments, and details are not repeated herein to avoid redundancy.
As shown in fig. 3 and 4, fig. 3 and 4 are schematic diagrams of a driving control circuit according to another embodiment of the present invention. The drive control circuit further includes a dc chopper circuit 130, and the first dc power supply 110 and the second dc power supply 120 are connected by the dc chopper circuit 130.
In one embodiment, the relationship between the first dc power source 110 and the second dc power source 120 may include the following two:
the first method comprises the following steps: as shown in fig. 3, the second dc power source 120 can be obtained from the first dc power source 110 through a dc chopper circuit 130;
and the second method comprises the following steps: as shown in fig. 4, the first dc power supply 110 can be obtained from the second dc power supply 120 through a dc chopper circuit 130.
As shown in fig. 5, fig. 5 is a schematic diagram of a switching unit 200 in a driving control circuit according to an embodiment of the present invention. The switch part 200 is a single pole double throw switch, and includes a fixed contact A3, a first movable contact a1 and a second movable contact a2, the fixed contact A3 of the single pole double throw switch is connected with the driving circuit 300, the first movable contact a1 of the single pole double throw switch is connected to a first voltage output terminal, and the second movable contact a2 of the single pole double throw switch is connected to a second voltage output terminal.
In one embodiment, when it is desired to switch to a different voltage output, the switching component 200 may communicate the fixed contact a3 and the corresponding movable contact, thereby allowing the driving circuit 300 to obtain a different input voltage. For example, the switching member 200 may communicate the fixed contact A3 and the first movable contact a1 through a selection switch such as a knife switch; the fixed contact A3 and the second movable contact A2 can be communicated through a selection switch such as a knife switch; thereby obtaining different input voltages.
It will be appreciated that a single pole, multiple throw switch is also possible in addition to the single pole, double throw switch described above.
As shown in fig. 6, fig. 6 is a schematic diagram of a switching unit 200 in a driving control circuit according to another embodiment of the present invention. The switching part 200 includes a first input terminal B1, a second input terminal B2, a first switching device Q1, a second switching device Q2, and a first output terminal B3, the first input terminal B1 is connected to the first voltage output terminal, the second input terminal B2 is connected to the second voltage output terminal, the first output terminal B3 is connected to the driving circuit 300, the first input terminal B1 is connected to the first output terminal B3 through a first switching device Q1, and the second input terminal B2 is connected to the first output terminal B3 through a second switching device Q2.
In one embodiment, when the driving circuit 300 needs to obtain different input voltages, the switching unit 200 may trigger the first switching unit 200 or the second switching unit 200, so that the first output terminal B3 needs to be connected to the first input terminal B1 or the second input terminal B2. For example, the first output terminal B3 may be communicated to the first input terminal B1 by controlling the first switching part 200 to be turned on; the first output terminal B3 can be communicated to the second input terminal B2 by controlling the second switch unit 200 to be conducted; thereby obtaining different input voltages.
It is understood that the first and second switching parts 200 and 200 may be switching devices such as transistors or fets.
As shown in fig. 7, fig. 7 is a schematic diagram of a driving control circuit according to another embodiment of the present invention. The driving circuit 300 in the driving control circuit includes a first inverter circuit 310, and the switching part 200 is connected to the three-phase winding 410 through the first inverter circuit 310.
In one embodiment, the first inverter circuit 310 can convert the dc voltage at the input of the driving circuit 300 into ac voltage and deliver the ac voltage to the three-phase winding 410 of the motor 400. In this embodiment, the drive circuit 300 may be connected to different voltage outputs depending on the target speed or the target frequency of the motor 400. For the switching manner between different voltage output terminals and the corresponding technical effects in the embodiments of the present invention, reference may be made to the above embodiments, and details are not described herein for avoiding redundancy.
As shown in fig. 8, fig. 8 is a schematic diagram of a driving control circuit according to another embodiment of the present invention. The driving circuit 300 in the driving control circuit further includes a first switch group KY, one end of each phase of the winding forms a first three-phase outgoing line group, the other end of each phase of the winding forms a second three-phase outgoing line group, the second three-phase outgoing line group is connected to the first inverter circuit 310, and the first three-phase outgoing line group is connected to the first switch group KY; the first switch group KY is closed and the three-phase winding 410 is switched to a star connection.
In an embodiment, the three-phase winding 410 may be switched to the star connection state by closing the first switch group KY so that the first three-phase outgoing line group is connected to form a neutral point. In this embodiment, in the star connection state, the driving circuit 300 may be connected to different voltage output terminals according to the target rotation speed or the target frequency of the motor 400. For the switching manner between different voltage output terminals and the corresponding technical effects in the embodiments of the present invention, reference may be made to the above embodiments, and details are not described herein for avoiding redundancy.
As shown in fig. 9, fig. 9 is a schematic diagram of a driving control circuit according to another embodiment of the present invention. The driving circuit 300 in the driving control circuit further includes a second inverter circuit 320, and the switching element 200 is further connected to the first three-phase outgoing line phase through the second inverter circuit 320; the first switch group KY is turned off and the three-phase winding 410 is switched to an open winding connection.
In an embodiment, the three-phase winding 410 may be switched to the star connection state by closing the first switch group KY and turning off the second inverter circuit 320, so that the first three-phase outgoing line group is connected to form a neutral point; secondly, the first switch group KY may be turned off, and the second inverter circuit 320 may be turned on, so that the first inverter circuit 310 and the second inverter circuit 320 simultaneously supply power to the three-phase winding 410, and the three-phase winding 410 is switched to an open winding connection state. In this embodiment, the driving circuit 300 may be connected to different voltage output terminals by the connection state of the three-phase winding 410, or by the target rotation speed or the target frequency of the motor 400. For the switching manner between different voltage output terminals and the corresponding technical effects in the embodiments of the present invention, reference may be made to the above embodiments, and details are not described herein for avoiding redundancy.
As shown in fig. 10, fig. 10 is a schematic diagram of a driving control circuit according to another embodiment of the present invention. The driving circuit 300 in the driving control circuit further includes a second switch group KD, and the second switch group KD is respectively connected with the first three-phase outgoing line group and the second three-phase outgoing line group; the first switch set KY is open, the second switch set KD is closed, and the three-phase winding 410 is switched to a delta connection.
In an embodiment, the three-phase winding 410 may be switched to the star connection state by closing the first switch group KY, opening the second switch group KD, and closing the second inverter circuit 320, so that the first three-phase outgoing line group is connected to form a neutral point; secondly, the first switch group KY can be disconnected, the first inverter circuit 310 or the second inverter circuit 320 is closed, and the second switch group KD is closed, so that the second inverter circuit 320 or the first inverter circuit 310 independently supplies power to the three-phase winding 410, and the three-phase winding 410 is switched to a delta connection state; in addition, the first switch group KY and the second switch group KD may be disconnected, and the first inverter circuit 310 and the second inverter circuit 320 may be turned on, so that the first inverter circuit 310 and the second inverter circuit 320 simultaneously supply power to the three-phase winding 410, and the three-phase winding 410 is switched to an open winding connection state. In this embodiment, the driving circuit 300 may be connected to different voltage output terminals by the connection state of the three-phase winding 410, or by the target rotation speed or the target frequency of the motor 400. For the switching manner between different voltage output terminals and the corresponding technical effects in the embodiments of the present invention, reference may be made to the above embodiments, and details are not described herein for avoiding redundancy.
As shown in fig. 11, fig. 11 is a schematic diagram of a driving control circuit according to another embodiment of the present invention. The driving circuit 300 in the driving control circuit further includes a second switch group KD, a second inverter circuit 320 and a fourth capacitor C4, the second switch group KD is respectively connected with the first three-phase outgoing line group and the second three-phase outgoing line group, the first switch group KY is disconnected, the second switch group KD is closed, the three-phase winding 410 is switched to be in triangular connection, and the second inverter circuit 320 is connected with the first three-phase outgoing line and is further connected in parallel with the fourth capacitor C4.
In an embodiment, the three-phase winding 410 may be switched to the star connection state by closing the first switch group KY and opening the second switch group KD so that the first three-phase outgoing line group is connected to form a neutral point; secondly, the first switch group KY may be opened and the second switch group KD may be closed, so that the first inverter circuit 310 supplies power to the three-phase winding 410, and the three-phase winding 410 is switched to the delta connection state. In this embodiment, the driving circuit 300 may be connected to different voltage output terminals by the connection state of the three-phase winding 410, or by the target rotation speed or the target frequency of the motor 400. For the switching manner between different voltage output terminals and the corresponding technical effects in the embodiments of the present invention, reference may be made to the above embodiments, and details are not described herein for avoiding redundancy.
With regard to fig. 7 to 11, the driving control circuit further includes a first capacitor C1 and a second capacitor C2, one end of the first capacitor C1 is connected to the first voltage output terminal, and one end of the second capacitor C2 is connected to the second voltage output terminal. First electric capacity C1 can play the effect of filtering to the signal of telecommunication of first voltage output end, and likewise, second electric capacity C2 can play the effect of filtering to the signal of telecommunication of second voltage output end, has guaranteed the steady operation of back-stage drive circuit 300 and motor 400.
With regard to fig. 7 to 9 and 11, the driving control circuit further includes a third capacitor C3, the switching unit 200 includes a first output terminal B3, the first output terminal B3 is connected to the driving circuit 300, and one end of the third capacitor C3 is connected to the first output terminal B3. The third capacitor C3 can filter the electric signal at the output terminal of the switching element 200, thereby ensuring the stable operation of the rear-stage driving circuit 300 and the motor 400.
Based on the above-mentioned driving control circuit, as shown in fig. 12, an embodiment of the present invention provides a driving control method applied to a driving control circuit, the driving control circuit is used for driving an open winding motor 400 having a three-phase winding 410, the driving control circuit includes a driving circuit 300, a first dc power supply 110, a second dc power supply 120 and a switching component 200, the driving circuit 300 is connected with the three-phase winding 410, the first dc power supply 110 is provided with a first voltage output end, the second dc power supply 120 is provided with a second voltage output end, and the switching component 200 is respectively connected with the first dc power supply 110, the second dc power supply 120 and the driving circuit 300; the driving control method comprises the following steps of:
s110: acquiring the running state of the motor 400;
s120: the switching part 200 is controlled to connect the driving circuit 300 to the first voltage output terminal or the second voltage output terminal according to the operation state.
In one embodiment, during operation, the switching component 200 selects different voltage outputs and thus different dc power sources to power the driving circuit 300, and then the driving circuit 300 drives the three-phase winding 410 to operate the motor 400. During operation, according to the operation state of the motor 400 and the voltage of the motor 400 corresponding to each operation state, the embodiment of the present invention can selectively connect different voltage output ends by controlling the switch component 200, so that the driving circuit 300 is connected to different voltage output ends, thereby obtaining different input voltages, and thus the voltage of the motor 400 and the operation state of the motor 400 can achieve a better matching effect, and therefore, the embodiment of the present invention can reduce the damage of the motor 400 or the driving control circuit, and can ensure the operation efficiency of the motor 400.
The operation state of motor 400 may be the connection state of three-phase winding 410, the rotation speed or frequency of motor 400, or both of them.
In addition, the driving control method in this embodiment is applied to the driving control circuit, and therefore, the detailed implementation and the corresponding technical effects of the driving control method in this embodiment can refer to the above embodiment, and are not described herein again to avoid redundancy.
As shown in fig. 13, fig. 13 is a schematic diagram of a driving control method according to another embodiment of the present invention. The embodiment of the present invention is an extension of the above steps S110 and S120, and includes, but is not limited to, the following steps:
s111: acquiring the connection state of the three-phase winding 410;
s121: the driving circuit 300 is connected to the first voltage output terminal or the second voltage output terminal according to the connection state of the three-phase winding 410.
In an embodiment, the operation state of the motor 400 may be a connection state of the three-phase winding 410. The connection states of the three-phase windings 410 include a star connection state, a delta connection state and an open winding connection state, wherein the open winding state means that the neutral point of the three-phase windings 410 of the conventional motor 400 is opened, one end of the three-phase windings is connected with an inverter, and the other end of the three-phase windings can be connected with the inverter or other switching devices to perform star and delta driving control, so that a novel topology structure of the motor 400 system with double-end power supply is formed.
It is understood that, regarding the connection states of the three-phase winding 410, the suitable input voltages corresponding to each connection state of the three-phase winding 410 are different accordingly, and thus, the embodiment of the present invention may switch to different voltage output terminals according to the switching between any two connection states of the star connection state, the delta connection state, and the open winding state of the three-phase winding 410. For example, when the three-phase winding 410 is switched from the open winding state to the delta connection state or from the delta state to the star connection state, the voltage required by the three-phase winding 410 may be decreased accordingly, and therefore, in order to ensure that the voltage of the three-phase winding 410 and the connection state of the three-phase winding 410 achieve a better matching effect and no loss is caused, the switching component 200 may be controlled to connect the driving circuit 300 to the corresponding voltage output terminal with a lower voltage. On the contrary, when the three-phase winding 410 is switched from the star connection state to the delta connection state or from the delta state to the open winding state, the voltage required by the three-phase winding 410 may be increased accordingly, and therefore, in order to ensure that the voltage of the three-phase winding 410 and the connection state of the three-phase winding 410 achieve a better matching effect and no loss is caused, the driving circuit 300 may be connected to the corresponding voltage output terminal with a higher voltage by controlling the switch component 200. Therefore, different input voltages can be obtained by switching to different voltage output terminals, so that the voltage of the three-phase winding 410 and the connection state of the three-phase winding 410 can achieve a better matching effect, damage to the motor 400 or the drive control circuit can be reduced, and the operating efficiency of the motor 400 can be ensured.
In addition, the specific implementation manner and the corresponding technical effects of the driving control method according to the embodiment of the present invention can refer to the above embodiments, and are not described herein again in order to avoid redundancy.
As shown in fig. 14, fig. 14 is a schematic diagram of a driving control method according to another embodiment of the present invention. The embodiment of the present invention is an extension of the above steps S110 and S120, and includes, but is not limited to, the following steps:
s112: acquiring the rotating speed of the motor 400;
s122: the driving circuit 300 is connected to the first voltage output terminal or the second voltage output terminal according to the rotation speed of the motor 400.
In an embodiment, the operating state of the motor 400 may be a rotational speed of the motor 400.
It should be noted that, for the rotation speed of the motor 400, the suitable input voltages corresponding to different rotation speeds of the motor 400 are also different accordingly. For example, when the target rotation speed required by the motor 400 is reduced, the voltage required by the three-phase winding 410 may be reduced accordingly, and therefore, in order to ensure that the voltage of the three-phase winding 410 and the rotation speed of the motor 400 achieve a better matching effect and cause no loss, the switching component 200 may be controlled to connect the driving circuit 300 to the corresponding voltage output terminal with a lower voltage. On the contrary, when the target rotation speed required by the motor 400 is increased, the voltage required by the three-phase winding 410 may be increased accordingly, and therefore, in order to ensure that the voltage of the three-phase winding 410 and the rotation speed of the motor 400 achieve a better matching effect and cause no loss, the driving circuit 300 may be connected to the corresponding voltage output terminal with higher voltage by controlling the switching component 200. Therefore, different input voltages can be obtained by switching to different voltage output ends, so that the voltage of the three-phase winding 410 and the rotating speed of the motor 400 can achieve a better matching effect, the damage of the motor 400 or a driving control circuit can be reduced, and the operating efficiency of the motor 400 can be ensured.
Further, in addition to the above-described rotational speed of the motor 400, it may also be a frequency of the motor 400, and it is understood that the rotational speed and the frequency substantially correspond.
In addition, the specific implementation manner and the corresponding technical effects of the driving control method according to the embodiment of the present invention can refer to the above embodiments, and are not described herein again in order to avoid redundancy.
As shown in fig. 15 and 17, fig. 15 is a schematic diagram of a driving control method according to another embodiment of the present invention, and fig. 17 is a schematic diagram of a switching relationship between a motor rotation speed and a dc power supply. The embodiment of the present invention is an extension of the step S122, and includes, but is not limited to, the following steps:
s210: when the rotation speed of the motor 400 reaches a preset first rotation speed threshold value in the rising process, the switch part 200 is controlled to enable the driving circuit 300 to be communicated with the first voltage output end.
In an embodiment, when the target rotation speed required by the motor 400 is increased, the voltage required by the three-phase winding 410 may be increased accordingly, and therefore, in order to ensure that the voltage of the three-phase winding 410 and the rotation speed of the motor 400 achieve a better matching effect and cause no loss, the driving circuit 300 may be connected to a corresponding voltage output terminal with a higher voltage by controlling the switching component 200.
In addition, the specific implementation manner and the corresponding technical effects of the driving control method according to the embodiment of the present invention can refer to the above embodiments, and are not described herein again in order to avoid redundancy.
As shown in fig. 16 and 17, fig. 16 is a schematic diagram of a driving control method according to another embodiment of the present invention. The embodiment of the present invention is an extension of the step S122, and includes, but is not limited to, the following steps:
s220: when the rotation speed of the motor 400 reaches the preset second rotation speed threshold value during the reduction process, the switching part 200 is controlled to connect the driving circuit 300 to the second voltage output terminal.
In an embodiment, when the target rotation speed required by the motor 400 is reduced, the voltage required by the three-phase winding 410 may be reduced accordingly, and therefore, in order to ensure that the voltage of the three-phase winding 410 and the rotation speed of the motor 400 achieve a better matching effect and cause no loss, the driving circuit 300 may be connected to the corresponding voltage output terminal with a lower voltage by controlling the switching component 200.
In addition, the specific implementation manner and the corresponding technical effects of the driving control method according to the embodiment of the present invention can refer to the above embodiments, and are not described herein again in order to avoid redundancy.
As shown in fig. 18 and fig. 19, fig. 18 is a schematic diagram of a driving control method according to another embodiment of the present invention, and fig. 19 is a state process diagram of switching from the second dc power supply 120 to the first dc power supply 110. The embodiment of the present invention is an extension of the step S120, and when the first dc power supply 110 is switched to the second dc power supply 120, the method includes, but is not limited to, the following steps:
s310: controlling the first direct current power supply 110 and the second direct current power supply 120 to adjust to a switching state at a first moment;
s320: at the second time, the control switching part 200 disconnects the first voltage output terminal and the driving circuit 300, and the control switching part 200 connects the second voltage output terminal and the driving circuit 300;
s330: at the third time, the first dc power supply 110 is controlled to be turned off, and the second dc power supply 120 is controlled to enter the operating state.
In an embodiment, adjusting the first dc power supply 110 and the second dc power supply 120 to the switching state at the first time can avoid the voltage difference provided by the first dc power supply 110 and the second dc power supply 120 during switching from being too large, thereby avoiding the unstable condition of the motor 400 during switching of the dc power supplies. When the first dc power supply 110 and the second dc power supply 120 are adjusted to the switching state, at the second time, the driving circuit 300 is disconnected from the first dc power supply 110 and selectively connected to the second dc power supply 120, so as to form the switching between the first dc power supply 110 and the second dc power supply 120. Since a certain time is required during the switching, in order to ensure that the next control is performed after the switching operation is completed, in this embodiment, the first dc power supply 110 is controlled to be turned off only at the third time after a period of time of the second time, and the second dc power supply 120 is controlled to enter the working state, so that the switching from the first dc power supply 110 to the second dc power supply 120 is finally completed.
It can be understood that, when the second dc power supply 120 is switched to the first dc power supply 110, a state process diagram of the switching from the first dc power supply 110 to the second dc power supply 120 is shown in fig. 20, and a specific implementation of the driving control method and the corresponding technical effects in fig. 20 may refer to the above embodiments, and are not described herein again to avoid redundancy.
As shown in fig. 21, fig. 21 is a schematic diagram of a driving control method according to another embodiment of the present invention, the switch component 200 is a single-pole double-throw switch, and includes a fixed contact A3, a first movable contact a1 and a second movable contact a2, the fixed contact A3 of the single-pole double-throw switch is connected to the driving circuit 300, the first movable contact a1 of the single-pole double-throw switch is connected to a first voltage output terminal, and the second movable contact a2 of the single-pole double-throw switch is connected to a second voltage output terminal; the embodiment of the present invention is an extension of the above step S120, and can be applied to the switch component 200 in fig. 5, including but not limited to the following steps:
s410: the fixed contact A3 is connected to the first movable contact a1 or the second movable contact a2 according to an operation state.
The specific implementation manner and the corresponding technical effects of the drive control method according to the embodiment of the present invention can refer to the above-mentioned embodiments, and are not described herein again in order to avoid redundancy.
As shown in fig. 22, fig. 22 is a schematic diagram of a driving control method according to another embodiment of the present invention, the switching component 200 includes a first input terminal B1, a second input terminal B2, a first switching device Q1, a second switching device Q2, and a first output terminal B3, the first input terminal B1 is connected to the first voltage output terminal, the second input terminal B2 is connected to the second voltage output terminal, the first output terminal B3 is connected to the driving circuit 300, the first input terminal B1 is connected to the first output terminal B3 through the first switching device Q1, and the second input terminal B2 is connected to the first output terminal B3 through the second switching device Q2; the embodiment of the present invention is an extension of the above step S120, and can be applied to the switch component 200 in fig. 6, including but not limited to the following steps:
s420: the first switching device Q1 or the second switching device Q2 is turned on according to the operation state.
The specific implementation manner and the corresponding technical effects of the drive control method according to the embodiment of the present invention can refer to the above-mentioned embodiments, and are not described herein again in order to avoid redundancy.
As shown in fig. 23, fig. 23 is a schematic diagram of a driving control method according to another embodiment of the present invention, where the driving circuit 300 includes a first inverter circuit 310, a first switch group KY and a second inverter circuit 320, one end of each phase of the winding forms a first three-phase outgoing line group, the other end of each phase of the winding forms a second three-phase outgoing line group, the switch component 200 is connected to the second three-phase outgoing line group through the first inverter circuit 310, and the switch component 200 is further connected to the first three-phase outgoing line phase through the second inverter circuit 320 and the first switch group KY in sequence; the first switch group KY is closed, and the three-phase winding 410 is switched to star connection; the first switch group KY is disconnected, and the three-phase winding 410 is switched to be connected with an open winding; the driving control method of the present embodiment can be applied to the driving control circuit in fig. 9, and further includes, but is not limited to, the following steps:
s510: controlling the first inverter circuit 310 to start operating, and controlling the second inverter circuit 320 to stop operating, so that the first inverter circuit 310 provides a first driving voltage to the three-phase winding 410 in the star connection state;
s520: the first inverter circuit 310 and the second inverter circuit 320 are controlled to start operating, so that the first inverter circuit 310 supplies a second driving voltage to the three-phase winding 410 in the open winding connection state, and the second inverter circuit 320 supplies a third driving voltage to the three-phase winding 410 in the open winding connection state.
In one embodiment, when the first switch group KY is closed, the three-phase winding 410 is in a star connection state, and the first inverter circuit 310 is controlled to start operating, and the second inverter circuit 320 is controlled to stop operating, so that the first inverter circuit 310 supplies voltage to the three-phase winding 410; in addition, when the first switch group KY is turned off, the three-phase winding 410 is brought into an open winding connection state, and the first inverter circuit 310 and the second inverter circuit 320 are controlled to start operating, so that the first inverter circuit 310 and the second inverter circuit 320 simultaneously supply voltage to the three-phase winding 410. When the three-phase winding 410 is switched from the star connection state to the open winding connection state, the lower bridge arm of the second inverter circuit 320 may be controlled to be open, the upper bridge arm may be controlled to be closed, so that the first three-phase outgoing line group of the three-phase winding 410 is connected through the second inverter circuit 320 to simulate a neutral point, and then the lower bridge arm of the second inverter circuit 320 may be closed, so that the first inverter circuit 310 and the second inverter circuit 320 may simultaneously provide voltage to the three-phase winding 410, thereby realizing switching without shutdown.
In the driving control method according to the embodiment of the present invention, the specific implementation manner of switching the voltage input end according to the connection state of the three-phase winding 410 and the corresponding technical effect can be referred to the above embodiments, and are not described herein again to avoid redundancy.
As shown in fig. 24, fig. 24 is a schematic diagram of a driving control method according to another embodiment of the present invention, the driving circuit 300 further includes a second switch group KD, and the second switch group KD is respectively connected to the first three-phase outgoing line group and the second three-phase outgoing line group; the first switch group KY is disconnected, the second switch group KD is closed, and the three-phase winding 410 is switched into triangular connection; the driving control method of the present embodiment can be applied to the driving control circuit in fig. 10, and further includes, but is not limited to, the following steps:
s530: the first inverter circuit 310 is controlled to start operating, and the second inverter circuit 320 is controlled to stop operating, so that the first inverter circuit 310 supplies the fourth driving voltage to the three-phase winding 410 in the delta connection state.
In one embodiment, when the first switch group KY is turned off and the second switch group KD is turned on, the three-phase winding 410 is enabled to be in a delta connection state, and the first inverter circuit 310 is controlled to start operating, and the second inverter circuit 320 is controlled to stop operating, so that the first inverter circuit 310 supplies voltage to the three-phase winding 410 in the delta connection state; or, when the first switch group KY is turned off and the second switch group KD is turned on, the three-phase winding 410 is enabled to be in the delta connection state, the second inverter circuit 320 is controlled to start to operate, and the first inverter circuit 310 is controlled to stop operating, so that the second inverter circuit 320 supplies voltage to the three-phase winding 410 in the delta connection state.
In the driving control method according to the embodiment of the present invention, the specific implementation manner of switching the voltage input end according to the connection state of the three-phase winding 410 and the corresponding technical effect can be referred to the above embodiments, and are not described herein again to avoid redundancy.
As shown in fig. 25, fig. 25 is a schematic diagram of a driving control method according to another embodiment of the present invention, and the driving control method according to this embodiment may be applied to the driving control circuit in fig. 10, and further includes, but is not limited to, the following steps:
s540: and controlling the second inverter circuit 320 to provide a fifth driving voltage to the three-phase windings 410 during the switching process, wherein the fifth driving voltage is a neutral point voltage of the three-phase windings 410 in a star connection state, or is a three-phase voltage of the three-phase windings 410 in a delta connection state.
In an embodiment, when the three-phase winding 410 is switched from the star connection state to the delta connection state, the second inverter circuit 320 may be controlled to simulate a neutral point, the first switch group KY is then disconnected, so that the first inverter circuit 310 and the second inverter circuit 320 simultaneously drive the three-phase winding 410, the control manner of the first inverter circuit 310 and the second inverter circuit 320 simulating the delta connection is adjusted, the second switch group KD is then closed, and the second inverter circuit 320 is finally closed, so that the star connection state is switched to the delta connection state, and the non-stop switching is realized.
In the driving control method according to the embodiment of the present invention, the specific implementation manner of switching the voltage input end according to the connection state of the three-phase winding 410 and the corresponding technical effect can be referred to the above embodiments, and are not described herein again to avoid redundancy.
As shown in fig. 26, fig. 26 is a schematic diagram of a driving control method according to another embodiment of the present invention, where the driving circuit 300 includes a first inverter circuit 310, a first switch group KY, a second switch group KD, a second inverter circuit 320, and a fourth capacitor C4, one end of each phase of winding forms a first three-phase outgoing line group, the other end of each phase of winding forms a second three-phase outgoing line group, the switch component 200 is connected to the second three-phase outgoing line group through the first inverter circuit 310, the second switch group KD is respectively connected to the first three-phase outgoing line group and the second three-phase outgoing line group, the second inverter circuit 320 is connected to the first three-phase outgoing line through the first switch group KY, and the second inverter circuit 320 is further connected to a fourth capacitor C4 in parallel; the first switch group KY is closed, the three-phase winding 410 is switched to be in star connection, the first switch group KY is opened, the second switch group KD is closed, and the three-phase winding 410 is switched to be in delta connection; the driving control method of the present embodiment can be applied to the driving control circuit in fig. 11, and further includes, but is not limited to, the following steps:
s550: controlling the first inverter circuit 310 to start operating so that the first inverter circuit 310 supplies a sixth driving voltage to the three-phase winding 410 in the star connection state;
s560: the first inverter circuit 310 is controlled to operate such that the first inverter circuit 310 supplies the seventh driving voltage to the three-phase winding 410 in the delta connection state.
The specific implementation manner and the corresponding technical effects of the drive control method according to the embodiment of the present invention can refer to the above-mentioned embodiments, and are not described herein again in order to avoid redundancy.
As shown in fig. 27, fig. 27 is a schematic diagram of a driving control method according to another embodiment of the present invention, and the driving control method according to this embodiment may be applied to the driving control circuit in fig. 11, and further includes, but is not limited to, the following steps:
s570: and controlling the second inverter circuit 320 to provide a fifth driving voltage to the three-phase windings 410 during the switching process, wherein the fifth driving voltage is a neutral point voltage of the three-phase windings 410 in a star connection state, or is a three-phase voltage of the three-phase windings 410 in a delta connection state.
The specific implementation manner and the corresponding technical effects of the drive control method according to the embodiment of the present invention can refer to the above-mentioned embodiments, and are not described herein again in order to avoid redundancy.
As shown in fig. 28, fig. 28 is a schematic diagram of a driving control method according to another embodiment of the present invention, and the embodiment of the present invention is an extension of the above steps S540 and S570, and can be applied to the driving control circuits in fig. 10 and 11, and further includes, but is not limited to, the following steps:
s610: the three-phase winding 410 is in star connection, and the second inverter circuit 320 is controlled to output neutral point voltage of the three-phase winding 410 in a star connection state;
s620: controlling the first switch group KY to be disconnected, and outputting neutral point voltage of the three-phase winding 410 in a star connection state by the second inverter circuit 320 for a first time threshold;
s630: controlling the second inverter circuit 320 to output three-phase voltages of the three-phase winding 410 in a delta connection state;
s640: and controlling the second switch group KD to be closed, and outputting the three-phase voltage of the three-phase winding 410 in the delta connection state by the second inverter circuit 320 for a second time threshold.
The specific implementation manner and the corresponding technical effects of the drive control method according to the embodiment of the present invention are as described above, and are not described herein again to avoid redundancy.
As shown in fig. 29, fig. 29 is a schematic diagram of a driving control method according to another embodiment of the present invention, and the embodiment of the present invention is an extension of steps S540 and S570 described above, and can be applied to the driving control circuits in fig. 10 and fig. 11, and further includes, but is not limited to, the following steps:
s710: the three-phase winding 410 keeps triangular connection, and controls the second inverter circuit 320 to output three-phase voltage when the three-phase winding 410 is in a triangular connection state;
s720: controlling the second switch group KD to be disconnected, and outputting three-phase voltage of the three-phase winding 410 in a delta connection state by the second inverter circuit 320 for a second time threshold;
s730: controlling the second inverter circuit 320 to output a neutral point voltage of the three-phase winding 410 in a star connection state;
s740: the first switch group KY is controlled to be closed, and the second inverter circuit 320 outputs the neutral point voltage of the three-phase winding 410 in the star connection state for the first time threshold.
The specific implementation manner and the corresponding technical effects of the drive control method according to the embodiment of the present invention are as described above, and are not described herein again to avoid redundancy.
Based on the above-described drive control circuit, an embodiment of the present invention provides a circuit board including the drive control circuit as described above.
Since the circuit board according to the embodiment of the present invention includes the driving control circuit according to any one of the embodiments described above, the circuit board according to the embodiment of the present invention has the technical effects brought by the driving control circuit according to any one of the embodiments described above, and therefore, the specific technical effects of the circuit board according to the embodiment of the present invention can refer to the technical effects of the driving control circuit according to any one of the embodiments described above, and are not described herein again.
Based on the above-mentioned drive control circuit or the above-mentioned drive control method, an embodiment of the present invention provides an air conditioner, including the above-mentioned circuit board; or, 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 cause the at least one processor to perform the drive control method as described above.
Since the air conditioner according to the embodiment of the present invention includes the above-mentioned circuit board or can execute the drive control method according to any of the above-mentioned embodiments, the air conditioner according to the embodiment of the present invention has the technical effects brought by the above-mentioned circuit board or the technical effects brought by the drive control method according to any of the above-mentioned embodiments, and therefore, specific technical effects of the air conditioner according to the embodiment of the present invention can refer to the technical effects of the above-mentioned circuit board according to the above-mentioned embodiments or the drive control method according to any of the above-mentioned embodiments, and are not described herein again.
Based on the above-described drive control method, an embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the drive control method as described above. For example, the method steps in fig. 12-29 described above are performed.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.

Claims (29)

1. A drive control circuit for driving an open-winding motor having three-phase windings, the drive control circuit comprising:
a drive circuit connected to the three-phase winding;
the power supply comprises a first direct current power supply and a second direct current power supply, wherein the first direct current power supply is provided with a first voltage output end, and the second direct current power supply is provided with a second voltage output end;
and the switch component is respectively connected with the first direct-current power supply, the second direct-current power supply and the driving circuit and is used for enabling the driving circuit to be communicated with the first voltage output end or the second voltage output end according to the running state of the motor.
2. The drive control circuit according to claim 1, further comprising an alternating-current power supply, a rectifying circuit, a voltage step-up circuit, and a voltage step-down circuit, the alternating-current power supply being connected to the voltage step-up circuit and the voltage step-down circuit through the rectifying circuit, respectively, the voltage step-up circuit being connected to the first voltage output terminal, the voltage step-down circuit being connected to the second voltage output terminal, the first direct-current power supply including the alternating-current power supply, the rectifying circuit, and the voltage step-up circuit, the second direct-current power supply including the alternating-current power supply, the rectifying circuit, and the voltage step-down circuit.
3. The drive control circuit according to claim 1, further comprising a dc chopper circuit, wherein the first dc power supply and the second dc power supply are connected to each other via the dc chopper circuit.
4. The drive control circuit of claim 1, wherein the switch component is a single-pole double-throw switch comprising a fixed contact, a first movable contact, and a second movable contact, the fixed contact of the single-pole double-throw switch being connected to the drive circuit, the first movable contact of the single-pole double-throw switch being connected to the first voltage output, the second movable contact of the single-pole double-throw switch being connected to the second voltage output.
5. The drive control circuit according to claim 1, wherein the switching section includes a first input terminal, a second input terminal, a first switching device, a second switching device, and a first output terminal, the first input terminal is connected to the first voltage output terminal, the second input terminal is connected to the second voltage output terminal, the first output terminal is connected to the drive circuit, the first input terminal is connected to the first output terminal through the first switching device, and the second input terminal is connected to the first output terminal through the second switching device.
6. The drive control circuit according to claim 1, characterized in that the drive circuit includes a first inverter circuit through which the switching part is connected to the three-phase winding.
7. The drive control circuit according to claim 6, wherein the drive circuit further comprises a first switch group, one end of each of the windings constitutes a first three-phase outgoing line group, the other end of each of the windings constitutes a second three-phase outgoing line group, the second three-phase outgoing line group is connected to the first inverter circuit, and the first three-phase outgoing line group is connected to the first switch group; the first switch group is closed, and the three-phase winding is switched to be in star connection.
8. The drive control circuit according to claim 7, wherein the drive circuit further includes a second inverter circuit, and the switch member is further connected to the first three-phase outgoing line phase through the second inverter circuit; the first switch group is disconnected, and the three-phase winding is switched to be connected with the open winding.
9. The drive control circuit according to claim 8, wherein the drive circuit further includes a second switch group connected to the first three-phase outgoing line group and the second three-phase outgoing line group, respectively; the first switch group is disconnected, the second switch group is closed, and the three-phase winding is switched into triangular connection.
10. The driving control circuit according to claim 7, wherein the driving circuit further includes a second switch group, a second inverter circuit, and a fourth capacitor, the second switch group is connected to the first three-phase outgoing line group and the second three-phase outgoing line group, respectively, the first switch group is open, the second switch group is closed, the three-phase windings are switched to be delta-connected, and the second inverter circuit is connected to the first three-phase outgoing line and is further connected to the fourth capacitor in parallel.
11. The drive control circuit according to any one of claims 1 to 10, characterized in that: the operating state of the motor includes at least one of:
the connection state of the three-phase winding;
the speed or frequency of the motor.
12. A drive control method applied to a drive control circuit for driving an open-winding motor having three-phase windings, the drive control circuit comprising:
a drive circuit connected to the three-phase winding;
the power supply comprises a first direct current power supply and a second direct current power supply, wherein the first direct current power supply is provided with a first voltage output end, and the second direct current power supply is provided with a second voltage output end;
a switch unit connected to the first dc power supply, the second dc power supply, and the driving circuit, respectively;
the drive control method includes:
acquiring the running state of the motor;
and controlling the switch component according to the running state to enable the driving circuit to be communicated with the first voltage output end or the second voltage output end.
13. The drive control method according to claim 12, wherein the acquiring the operating state of the motor includes: acquiring the connection state of the three-phase winding;
correspondingly, the controlling the switch component to enable the driving circuit to connect the first voltage output end or the second voltage output end according to the operating state includes: and enabling the driving circuit to be communicated with the first voltage output end or the second voltage output end according to the connection state of the three-phase winding.
14. The drive control method according to claim 13, characterized in that the connection state of the three-phase winding includes: and switching between any two connection states of a star connection state, a delta connection state and an open winding state.
15. The drive control method according to claim 12, wherein the acquiring the operating state of the motor includes: acquiring the rotating speed of the motor;
correspondingly, the controlling the switch component to enable the driving circuit to connect the first voltage output end or the second voltage output end according to the operating state includes: and enabling the driving circuit to be communicated with the first voltage output end or the second voltage output end according to the rotating speed of the motor.
16. The drive control method according to claim 15, wherein the causing the drive circuit to communicate with the first voltage output terminal or the second voltage output terminal according to the rotation speed of the motor includes at least one of:
when the rotating speed of the motor reaches a preset first rotating speed threshold value in the rising process, controlling the switch component to enable the driving circuit to be communicated with the first voltage output end;
and when the rotating speed of the motor reaches a preset second rotating speed threshold value in the reducing process, controlling the switch component to enable the driving circuit to be communicated with the second voltage output end.
17. The drive control method according to claim 12,
the controlling the switch component to enable the driving circuit to connect the first voltage output end or the second voltage output end according to the operation state comprises:
according to the running state, controlling the switch component to enable the driving circuit to be switched from being communicated with the first direct-current power supply to being communicated with the second direct-current power supply;
correspondingly, the controlling the switch component to switch the driving circuit from being connected with the first direct-current power supply to being connected with the second direct-current power supply comprises:
controlling the first direct current power supply and the second direct current power supply to be adjusted to a switching state at a first moment;
at a second moment, controlling the switch component to disconnect the first voltage output end from the driving circuit, and controlling the switch component to connect the second voltage output end with the driving circuit;
and at the third moment, controlling the first direct current power supply to be closed, and controlling the second direct current power supply to enter a working state.
18. The drive control method according to claim 12, wherein the switch member is a single-pole double-throw switch including a fixed contact, a first movable contact, and a second movable contact, the fixed contact of the single-pole double-throw switch being connected to the drive circuit, the first movable contact of the single-pole double-throw switch being connected to the first voltage output terminal, the second movable contact of the single-pole double-throw switch being connected to the second voltage output terminal;
the controlling the switch component to enable the driving circuit to connect the first voltage output end or the second voltage output end according to the operation state comprises:
connecting the fixed contact to the first movable contact or the second movable contact according to the operating state.
19. The drive control method according to claim 12, wherein the switch section includes a first input terminal, a second input terminal, a first switching device, a second switching device, and a first output terminal, the first input terminal is connected to the first voltage output terminal, the second input terminal is connected to the second voltage output terminal, the first output terminal is connected to the drive circuit, the first input terminal is connected to the first output terminal through the first switching device, the second input terminal is connected to the first output terminal through the second switching device;
the controlling the switch component to enable the driving circuit to connect the first voltage output end or the second voltage output end according to the operation state comprises:
turning on the first switching device or the second switching device according to the operation state.
20. The drive control method according to claim 12, wherein the drive circuit includes a first inverter circuit, a first switch group, and a second inverter circuit, one end of the winding of each phase constitutes a first three-phase outgoing line group, the other end of the winding of each phase constitutes a second three-phase outgoing line group, the switch component is connected to the second three-phase outgoing line group through the first inverter circuit, and the switch component is further connected to the first three-phase outgoing line phase through the second inverter circuit and the first switch group in this order; the first switch group is closed, and the three-phase winding is switched into star connection; the first switch group is disconnected, and the three-phase winding is switched to be connected with an open winding;
the drive control method further includes:
controlling the first inverter circuit to start working, and controlling the second inverter circuit to stop working, so that the first inverter circuit provides a first driving voltage for the three-phase winding in the star connection state;
and controlling the first inverter circuit and the second inverter circuit to start working so that the first inverter circuit provides a second driving voltage for the three-phase winding in an open winding connection state, and the second inverter circuit provides a third driving voltage for the three-phase winding in the open winding connection state.
21. The drive control method according to claim 20, wherein the drive circuit further includes a second switch group connected to the first three-phase outgoing line group and the second three-phase outgoing line group, respectively; the first switch group is disconnected, the second switch group is closed, and the three-phase winding is switched into triangular connection;
the drive control method further includes:
and controlling the first inverter circuit to start working and controlling the second inverter circuit to stop working so that the first inverter circuit provides a fourth driving voltage for the three-phase winding in the delta connection state.
22. The drive control method according to claim 21, characterized by further comprising:
and controlling the second inverter circuit to provide a fifth driving voltage to the three-phase winding in the switching process, wherein the fifth driving voltage is a neutral point voltage of the three-phase winding in a star connection state, or a three-phase voltage of the three-phase winding in a delta connection state.
23. The drive control method according to claim 12, wherein the drive circuit includes a first inverter circuit, a first switch group, a second inverter circuit, and a fourth capacitor, one end of each of the windings constitutes a first three-phase outgoing line group, the other end of each of the windings constitutes a second three-phase outgoing line group, the switch component is connected to the second three-phase outgoing line group through the first inverter circuit, the second switch group is connected to the first three-phase outgoing line group and the second three-phase outgoing line group, respectively, the second inverter circuit is connected to the first three-phase outgoing line through the first switch group, and the second inverter circuit is further connected in parallel to the fourth capacitor; the first switch group is closed, the three-phase winding is switched to be in star connection, the first switch group is disconnected, the second switch group is closed, and the three-phase winding is switched to be in delta connection;
the drive control method further includes:
controlling the first inverter circuit to start working so that the first inverter circuit provides a sixth driving voltage for the three-phase winding in the star connection state;
and controlling the first inverter circuit to start working so that the first inverter circuit provides seventh driving voltage for the three-phase winding in the delta connection state.
24. The drive control method according to claim 23, characterized by further comprising:
and controlling the second inverter circuit to provide a fifth driving voltage to the three-phase winding in the switching process, wherein the fifth driving voltage is a neutral point voltage of the three-phase winding in a star connection state, or a three-phase voltage of the three-phase winding in a delta connection state.
25. The drive control method according to claim 22 or 24, wherein the controlling the second inverter circuit to supply a fifth drive voltage to the three-phase winding during switching includes:
the three-phase winding keeps star connection, and the second inverter circuit is controlled to output neutral point voltage of the three-phase winding in a star connection state;
the first switch group is controlled to be disconnected, the second inverter circuit outputs neutral point voltage of the three-phase winding in a star connection state, and the neutral point voltage lasts for a first time threshold value;
controlling the second inverter circuit to output three-phase voltage of the three-phase winding in a triangular connection state;
and controlling the second switch group to be closed, and outputting the three-phase voltage of the three-phase winding in the triangular connection state by the second inverter circuit for a second time threshold.
26. The drive control method according to claim 22 or 24, wherein the controlling the second inverter circuit to supply a fifth drive voltage to the three-phase winding during switching includes:
the three-phase windings are in triangular connection, and the second inverter circuit is controlled to output three-phase voltage of the three-phase windings in a triangular connection state;
the second switch group is controlled to be disconnected, and the second inverter circuit outputs three-phase voltage of the three-phase winding in a triangular connection state for a second time threshold value;
controlling the second inverter circuit to output neutral point voltage of the three-phase winding in a star connection state;
and controlling the first switch group to be closed, and outputting the neutral point voltage of the three-phase winding in the star connection state by the second inverter circuit for a first time threshold.
27. A circuit board, characterized by: comprising a drive control circuit according to any of claims 1 to 11.
28. An air conditioner, characterized in that:
comprising the wiring board of claim 27;
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 12 to 26.
29. A computer-readable storage medium storing computer-executable instructions for causing a computer to execute the drive control method according to any one of claims 12 to 26.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113315272A (en) * 2021-06-15 2021-08-27 郑州大学 Multi-output shaft type independent voltage-regulating variable frequency motor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010193702A (en) * 2009-01-21 2010-09-02 Kazuo Kawabe Apparatus and method for controlling induction motor
CN201708762U (en) * 2010-06-25 2011-01-12 江苏国力锻压机床有限公司 Double-voltage control circuit
CN102208877A (en) * 2010-03-30 2011-10-05 上海海事大学 Mixing voltage source type DC/ AC inverter
CN108075562A (en) * 2017-11-17 2018-05-25 苏州绿恺动力电子科技有限公司 High-power portable electrical equipment and its power control and method
CN109560744A (en) * 2017-09-26 2019-04-02 株式会社东芝 The wiring switching method of motor-driven system and open circuit winding construction motor
CN110299886A (en) * 2018-03-22 2019-10-01 丰田自动车株式会社 Electric motor system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010193702A (en) * 2009-01-21 2010-09-02 Kazuo Kawabe Apparatus and method for controlling induction motor
CN102208877A (en) * 2010-03-30 2011-10-05 上海海事大学 Mixing voltage source type DC/ AC inverter
CN201708762U (en) * 2010-06-25 2011-01-12 江苏国力锻压机床有限公司 Double-voltage control circuit
CN109560744A (en) * 2017-09-26 2019-04-02 株式会社东芝 The wiring switching method of motor-driven system and open circuit winding construction motor
CN108075562A (en) * 2017-11-17 2018-05-25 苏州绿恺动力电子科技有限公司 High-power portable electrical equipment and its power control and method
CN110299886A (en) * 2018-03-22 2019-10-01 丰田自动车株式会社 Electric motor system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113315272A (en) * 2021-06-15 2021-08-27 郑州大学 Multi-output shaft type independent voltage-regulating variable frequency motor
CN113315272B (en) * 2021-06-15 2022-08-12 郑州大学 Multi-output shaft type independent voltage-regulating variable frequency motor

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