CN214799333U - Motor drive circuit, motor and household electrical appliance - Google Patents
Motor drive circuit, motor and household electrical appliance Download PDFInfo
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- CN214799333U CN214799333U CN202023281832.5U CN202023281832U CN214799333U CN 214799333 U CN214799333 U CN 214799333U CN 202023281832 U CN202023281832 U CN 202023281832U CN 214799333 U CN214799333 U CN 214799333U
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Abstract
The utility model discloses a motor drive circuit, motor and household electrical appliances. Wherein, motor drive circuit includes: the first three-phase inverter unit is used for outputting a first control instruction to the motor under the condition of receiving a third control signal; the first control instruction is used for triggering the motor to run at a first speed; the second three-phase inversion unit is used for stopping working under the condition that the switch unit is closed; and the controller is used for outputting a second control instruction to the motor when the third control signal is received and the switch unit is switched off; the second control instruction is used for triggering the motor to operate at a second speed; the second speed is greater than the first speed.
Description
Technical Field
The application relates to the technical field of motor drive, in particular to a motor drive circuit, a motor and household electrical appliances.
Background
In the related art, a non-polar capacitor is used as an energy storage component of a direct current bus in a motor driver, so that inverter voltage limitation occurs, and the rotating speed of a motor is reduced.
SUMMERY OF THE UTILITY MODEL
In view of this, embodiments of the present application provide a motor driving circuit, a motor and a household appliance, so as to at least solve the problems of limited inverter voltage and reduced motor rotation speed in the related art.
The technical scheme of the embodiment of the application is realized as follows:
the embodiment of the application provides a motor drive circuit, motor drive circuit includes: the power supply comprises a rectification filtering module, a power supply module and a control module which are connected with the rectification filtering module in series, and an energy storage module and an inversion module which are connected with the power supply module in parallel; the inversion module is also connected with the control module; the energy storage module comprises a non-polar capacitor; the inversion module comprises a first three-phase inversion unit, a second three-phase inversion unit and a switch unit, wherein the first three-phase inversion unit and the second three-phase inversion unit are connected in parallel, the switch unit is connected with the second three-phase inversion unit, and the switch unit comprises a first switch and a second switch;
the power supply module is used for outputting a second voltage to the control module under the condition of receiving the first voltage output by the rectifying and filtering module;
the control module is used for outputting a first control signal and a second control signal to the switch unit in the inversion unit, and outputting a third control signal to the first three-phase inversion unit and the second three-phase inversion unit in the inversion unit;
the switch unit is used for being closed when the first control signal is received and used for being opened when the second control signal is received;
the first three-phase inverter unit is used for outputting a first control instruction to the motor under the condition of receiving the third control signal; the first control instruction is used for triggering the motor to run at a first speed;
the second three-phase inversion unit is used for stopping working under the condition that the switch unit is closed; and the controller is used for outputting a second control instruction to the motor when the third control signal is received and the switch unit is switched off; the second control instruction is used for triggering the motor to operate at a second speed; the second speed is greater than the first speed.
In the above scheme, the power module includes a first diode, a first resistor and a first capacitor connected in series; wherein the content of the first and second substances,
the anode of the first diode is connected with the rectifying and filtering module; the first resistor and the first capacitor are connected with the control module.
In the above scheme, the power module includes a first diode, a first resistor and a first capacitor connected in series; wherein the content of the first and second substances,
the anode of the first diode is connected with the rectifying and filtering module; and the cathode of the first diode is connected with the control module.
In the above scheme, the power module further includes a second resistor connected in parallel with the first capacitor.
In the above scheme, the first capacitor is an electrolytic capacitor.
In the above scheme, the rectification and filtering module comprises a rectification unit and a filtering unit which are connected in series; the filtering unit comprises a first inductor.
In the above scheme, the filtering unit is configured to filter the voltage output by the rectifying unit.
In the above scheme, the filtering unit is configured to filter an input voltage of the motor driving circuit.
The embodiment of the application also provides a motor, which comprises a motor body and a motor driving circuit; the motor body is connected with the motor driving circuit; the motor driving circuit is used for driving the motor to operate; the motor driving circuit is the motor driving circuit of any one of the above schemes.
The embodiment of the application also provides household electrical appliance equipment which at least comprises a motor driving circuit and a motor body; the motor driving circuit is used for driving the motor body to operate; the motor driving circuit is the motor driving circuit of any one of the above schemes.
In the embodiment of the application, the motor driving circuit comprises a rectification filter module, a power module and a control module which are connected in series with the rectification filter module, and an energy storage module and an inversion module which are connected in parallel with the power module, wherein the inversion module is further connected with the control module, the energy storage module comprises a non-polar capacitor, the inversion module comprises a first three-phase inversion unit and a second three-phase inversion unit which are connected in parallel, and a switch unit connected with the second three-phase inversion unit, the power module is used for outputting a second voltage to the control module when receiving a first voltage output by the rectification filter module, the control module is used for outputting a first control signal and a second control signal to the switch unit in the inversion unit, and outputting a third control signal to the first three-phase inversion unit and the second three-phase inversion unit in the inversion unit, the switch unit is used for being closed when receiving the first control signal, the three-phase inverter circuit comprises a first three-phase inverter unit, a second three-phase inverter unit and a power supply unit, wherein the first three-phase inverter unit is used for outputting a first control command to the motor when receiving a third control signal, the first control command is used for triggering the motor to run at a first speed, the second three-phase inverter unit is used for stopping working when the switching unit is closed, the second three-phase inverter unit is used for outputting a second control command to the motor when receiving the third control signal and the switching unit is open, the second control command is used for triggering the motor to run at a second speed, the second speed is higher than the first speed, the motor is driven by the two three-phase inverter circuits, and the voltage applied to a single-phase winding can be increased under the condition that the energy storage module is a non-polar capacitor and has the same bus voltage, so that the running speed of the motor is increased.
Drawings
Fig. 1 is a schematic structural diagram of a motor driving circuit according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating an internal circuit connection of a three-phase inverter unit according to an embodiment of the present application;
fig. 3 is a schematic circuit diagram illustrating a connection between a switching unit and a second three-phase inverter unit according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a control module according to an embodiment of the present application;
fig. 5 is a schematic diagram illustrating an internal circuit connection of a power module according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram illustrating an internal circuit connection of a power module according to another embodiment of the present application;
FIG. 7 is a schematic diagram illustrating an internal circuit connection of a power module according to another embodiment of the present application;
fig. 8 is a schematic structural diagram of a motor driving circuit according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a motor driving circuit according to another embodiment of the present application;
FIG. 10 is a schematic diagram of a motor drive circuit according to yet another embodiment of the present application;
FIG. 11 is a schematic diagram of an electrical machine according to an embodiment of the present application;
fig. 12 is a schematic structural diagram of a home appliance according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and specific embodiments.
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
The technical means described in the embodiments of the present application may be arbitrarily combined without conflict.
In addition, in the present examples, "first", "second", and the like are used for distinguishing similar objects, and are not necessarily used for describing a particular order or sequence.
The embodiment of the application provides a motor driving circuit, and fig. 1 is a schematic structural diagram of the motor driving circuit according to the embodiment of the application. As shown in fig. 1, the motor driving circuit includes a rectifying and filtering module 101, a power module 102 and a control module 103 connected in series with the rectifying and filtering module 101, and an energy storage module 104 and an inverter module 105 connected in parallel with the power module 102. The inversion module 105 is further connected to the control module 103.
The energy storage module 104 includes a non-polar capacitor, and the non-polar capacitor plays a role of energy storage. In practical applications, the non-polar capacitor used by the energy storage module 104 for storing energy may be a thin film capacitor.
The inverter module 105 includes a first three-phase inverter unit 1051 and a second three-phase inverter unit 1052 connected in parallel, and a switching unit 1053 connected to the second three-phase inverter unit 1052. The first three-phase inverter unit 1051 and the second three-phase inverter unit 1052 are respectively composed of six switching tubes. The switch unit 1053 includes a first switch 1054 and a second switch 1055.
For example, fig. 2 shows a schematic diagram of the internal circuit connection of a three-phase inverter unit. As shown in fig. 2, a three-phase inverter unit includes three switching tube units connected in parallel, and each switching tube unit is composed of two switching tubes. The base of each of all the switch tube units is used for connecting the control module 103, wherein,
the first switch tube unit comprises a switch tube 201 and a switch tube 202; the collector of the switch tube 201 is used for connecting the output end of the rectifying and filtering module 101, the emitter of the switch tube 201 is connected with the collector of the switch tube 202, and the emitter of the switch tube 202 is used for grounding. Wherein, the emitter of the switch tube 201 is also connected with the U phase of the motor. In practical applications, the emitter of the switching tube 201 may also be used to connect any one of the V-phase and W-phase.
The second switch tube unit comprises a switch tube 203 and a switch tube 204; the collector of the switch tube 203 is used for connecting the output end of the rectifying and filtering module 101, the emitter of the switch tube 203 is connected with the collector of the switch tube 204, and the emitter of the switch tube 204 is used for grounding. Wherein, the emitter of the switch tube 203 is also connected with the V phase of the motor. In practical applications, the emitter of the switching tube 203 can also be used to connect any one of the V-phase and W-phase.
The third switching tube unit comprises a switching tube 205 and a switching tube 206; the collector of the switch tube 205 is used for connecting the output end of the rectifying and filtering module 101, the emitter of the switch tube 205 is connected with the collector of the switch tube 206, and the emitter of the switch tube 206 is used for grounding. Wherein, the emitter of the switch tube 205 is also connected with the W phase of the motor. In practical applications, the emitter of the switching tube 205 can also be used to connect any end of the U-phase and the V-phase.
In practical applications, one end of the first switch 1054 and one end of the second switch 1055 in the switch unit 1053 are connected to the second three-phase inverter unit 1052, and the other end is used for connecting to the motor.
For example, fig. 3 shows a schematic circuit connection diagram of the switching unit 1053 and the second three-phase inverter unit 1052, and as shown in fig. 3, the second three-phase inverter unit 1052 is composed of six switching tubes. A first end of the first switch 1054 is connected to the emitter of the switching tube 301 of the second inverter unit 1053, a first end of the second switch 1055 is connected to the emitter of the switching tube 305 of the second inverter unit 1053, a second end of the first switch 1054 is connected to the emitter of the switching tube 303 of the second inverter unit 1053, and a second end of the second switch 1055 is connected to the emitter of the switching tube 303 of the second inverter unit 1053.
In practical applications, the first terminal of the first switch 1054 is further connected to a U-phase terminal of the motor to be driven by the motor driving circuit, the first terminal of the second switch 1055 is further connected to a W-phase terminal of the motor to be driven by the motor driving circuit, and the second terminals of the first switch 1054 and the second switch 1055 are further connected to a V-phase terminal of the motor, so that the operation of the motor can be driven.
In the motor drive circuit shown in fig. 1, an ac voltage is input to the motor drive circuit, and the input ac voltage is rectified and filtered by the rectifying and filtering module 101, thereby smoothing the input ac voltage. The power module 102 performs further processing on the voltage output by the rectifying and filtering module 101, for example, voltage stabilization and current limitation are performed on the voltage output by the rectifying and filtering module 101, so as to obtain a stable dc voltage, and provide operating power to the control module 103.
In practical applications, fig. 4 shows a schematic structural diagram of the control module 103. As shown in fig. 4, the control module 103 includes a DC/DC converter 401 and a control circuit 402, wherein the control circuit 402 includes a micro control unit and a peripheral driving circuit.
In practical applications, the operating power supply of the control circuit 402 is small, so that the DC/DC converter 401 needs to convert the high voltage of the power supply module into the low voltage required by the control circuit 402, so as to enable the control circuit 402 to operate normally. The low voltage required by the control circuit 402 includes a power supply voltage required by the micro control unit and a low voltage required by the peripheral driving circuit.
The control module 103 is configured to output a first control signal and a second control signal to the switch unit 1053 in the inverter unit, and change the operating states of the first switch 1054 and the second switch 1055 in the switch unit 1053 in the circuit through the first control signal and the second control signal; the control module 103 is further configured to output a third control signal to the first three-phase inversion unit 1051 and the second three-phase inversion unit 1052 in the inversion unit 105.
The energy storage module 104 is used for storing electric quantity, and the voltages at two ends of the energy storage module 104 can fluctuate greatly along with the input power voltage, so that the control module 103 can control the motor to output torque fluctuating at the same frequency as the power voltage, and the power factor of the motor is improved.
The inverter module 105 is capable of converting a dc voltage into an ac voltage, and the switch unit 1053 of the inverter module 105 is configured to be closed when receiving the first control signal, that is, the first switch 1054 and the second switch 1055 are in a closed state. Under the condition that the switch unit 1053 is closed, the second three-phase inversion unit 1052 does not work, and the inversion module 105 drives the motor to operate through the first three-phase inversion unit 1051. At this time, the first three-phase inverter unit 1051 outputs a first control instruction to the motor when receiving the third control signal and the switch unit 1053 is closed, and the first control instruction is used for triggering the motor to operate at the first speed. The second three-phase inverter unit 1052 stops operating when the switching unit 1053 is closed.
The switch unit 1053 of the inverter module 105 is configured to be turned off when receiving the second control signal, that is, the first switch 1054 and the second switch 1055 are in an off state. Under the condition that the switch unit 1053 is turned off, the first switch 1054 and the second switch 1055 are both in an off state, and at this time, the inverter module 105 drives the motor to operate together through the first three-phase inverter unit 1051 and the second three-phase inverter unit 1052. When the second three-phase inverter unit 1052 receives the third control signal and the switch unit 1053 is turned off, it outputs a second control command to the motor, where the second control command is used to trigger the motor to operate at a second speed, where the second speed is greater than the first speed. Since the voltage applied to the single-phase winding can be increased when the motor is driven by the first three-phase inverter unit 1051 and the second three-phase inverter unit 1052 together, compared to when the motor is driven by only the first three-phase inverter unit 1051, the power factor of the motor can be increased, so that the motor can be operated at a high speed. In practical application, the control module 103 is used for controlling the operating state of the switch module 1053, so that a motor switching structure can be realized, and the motor can work in a star-shaped or triangular structure, so that the motor can be controlled to work at different operating speeds. In practical applications, the motor may be a permanent magnet synchronous motor.
In the above embodiment, the motor driving circuit includes a rectifying and filtering module, a power module and a control module connected in series with the rectifying and filtering module, and an energy storage module and an inverting module connected in parallel with the power module, wherein the inverting module is further connected to the control module, the energy storage module includes a non-polar capacitor, the inverting module includes a first three-phase inverting unit and a second three-phase inverting unit connected in parallel, and a switching unit connected to the second three-phase inverting unit, the power module is configured to output a second voltage to the control module when receiving a first voltage output by the rectifying and filtering module, the control module is configured to output a first control signal and a second control signal to the switching unit in the inverting unit, and output a third control signal to the first three-phase inverting unit and the second three-phase inverting unit in the inverting unit, the switching unit is configured to be turned on when receiving the first control signal, the three-phase inverter circuit comprises a first three-phase inverter unit, a second three-phase inverter unit and a power supply unit, wherein the first three-phase inverter unit is used for outputting a first control command to the motor when receiving a third control signal, the first control command is used for triggering the motor to run at a first speed, the second three-phase inverter unit is used for stopping working when the switching unit is closed, the second three-phase inverter unit is used for outputting a second control command to the motor when receiving the third control signal and the switching unit is open, the second control command is used for triggering the motor to run at a second speed, the second speed is higher than the first speed, the motor is driven by the two three-phase inverter circuits, and the voltage applied to a single-phase winding can be increased under the condition that the energy storage module is a non-polar capacitor and has the same bus voltage, so that the running speed of the motor is increased.
In an embodiment, as shown in fig. 5, the power module 102 includes a first diode 501, a first resistor 502, and a first capacitor 503 connected in series, wherein an anode of the first diode 501 is connected to the rectifying and filtering module 101, and the first resistor 502 and the first capacitor 503 are connected to the control module 103.
When the motor driving circuit starts to work, the single-phase alternating-current voltage input into the motor driving circuit flows into the anode of the first diode 501 of the power module 102 after passing through the filtering and rectifying module 101, in the power module 102, the first diode 501 can realize one-way conduction to the input current, the first resistor 502 can play a role in limiting the current, and the first capacitor 503 can realize the functions of storing energy and stabilizing the voltage, so that the power module 102 outputs stable voltage.
The first resistor 502 and the first capacitor 503 are connected to the control module 103, in practical applications, the DC/DC converter in the control module 103 converts a high voltage in the power module 102 into a low voltage required by the control circuit 402 in the control module 103, when the first resistor 502 and the first capacitor 503 are connected to the control module 103, the DC/DC converter 401 in the control module 103 sets the inverted voltage to the first resistor 502 and the first capacitor 503, and the DC/DC converter 401 in the control module 103 converts the output voltage of the first resistor 502 into a low voltage required by the control circuit in the control module 103.
In the above embodiment, the power module includes the first diode, the first resistor and the capacitor that are connected in series, wherein, the anode of the first diode is connected with the rectification filter module, and the first resistor and the first capacitor are connected with the control module, so that stable voltage can be output through the power module, thereby being favorable for providing stable operating voltage for other modules in the motor driving circuit, and ensuring the normal operation of the motor driving circuit.
In an embodiment, as shown in fig. 6, the power module 102 includes a first diode 601, a first resistor 602, and a first capacitor 603 connected in series, wherein an anode of the first diode 601 is connected to the rectifying and filtering module 101, and a cathode of the first diode 601 is connected to the control module 103.
When the motor driving circuit starts to work, the single-phase alternating-current voltage input into the motor driving circuit flows into the anode of the first diode 601 of the power module 102 after passing through the filtering and rectifying module 101, in the power module 102, the first diode 601 can realize one-way conduction to the input current, the first resistor 602 can play a role in limiting the current, and the first capacitor 603 can realize the functions of storing energy and stabilizing the voltage, so that the power module 102 outputs stable voltage.
In practical applications, the DC/DC converter 401 in the control module 103 converts the high voltage in the power module into the low voltage required by the control circuit 402 in the control module 103, and when the cathode of the first diode 601 is connected to the control module 103, the DC/DC converter 401 in the control module 103 sets the inverted sampling voltage as the cathode of the first diode 601, and the DC/DC converter 401 in the control module 103 converts the voltage output from the cathode of the first diode 601 into the low voltage required by the control circuit in the control module 103.
In the above embodiment, the power module includes a first diode, a first resistor and a capacitor connected in series, wherein an anode of the first diode is connected to the rectifying and filtering module, and a cathode of the first diode is connected to the control module, thereby facilitating to provide a stable working voltage and ensuring the normal operation of the motor driving circuit.
In one embodiment, as shown in fig. 7, the power module 102 further includes a second resistor 701 connected in parallel with the first capacitor 702.
Here, the first capacitor 702 in the power module 102 can perform an energy storage function, and after the power is turned off, the second resistor 701 connected in parallel with the first capacitor 702 can quickly discharge the electric energy stored on the first capacitor 702.
In the above embodiment, the power module further includes a second resistor connected in parallel with the first capacitor, and the second resistor can rapidly discharge the electric energy stored in the first capacitor in the power module after the power is turned off.
In one embodiment, the first capacitor in the power module 102 is an electrolytic capacitor.
Here, the first capacitor in the power module 102 is an electrolytic capacitor, and since the electrolytic capacitor has a very large capacitance per unit volume and is advantageous in price compared to other types of capacitors, a large amount of electricity can be stored when the motor drive circuit operates.
In the above embodiment, the first capacitor in the power module is an electrolytic capacitor, so that when the motor driving circuit operates, a large amount of electric power can be stored by the electrolytic capacitor, which is beneficial to providing required electric power for other modules.
In an embodiment, as shown in fig. 8, the rectifying and filtering module 101 includes a rectifying unit 801 and a filtering unit 802, wherein the rectifying unit 801 and the filtering unit 802 are connected in series. The filter unit 802 is a first inductor. The rectifying unit 801 is a single-phase full-bridge rectifying unit composed of four different diodes.
As shown in fig. 8, the rectifying unit 801 includes two diode units connected in parallel, each diode unit is composed of two diodes, the first diode unit includes a diode 8011 and a diode 8012, the second diode unit includes a diode 8013 and a diode 8014, an anode of the diode 8011 is connected to a cathode of the diode 8012, the cathode of the diode 8011 is connected to an input terminal of the power module 102, the anode of the diode 8012 is used for grounding, the anode of the diode 8013 is connected to a cathode of the diode 8014, the cathode of the diode 8013 is connected to the input terminal of the power module 102, and the anode of the diode 8012 is used for grounding. The input ac voltage is converted into a unidirectional pulsating dc voltage by the rectifying unit 801. The filtering unit 802 can be used to filter out ripples in the input voltage.
In the above embodiment, the rectifying and filtering module includes the rectifying unit and the filtering unit connected in series, and the filtering unit includes the first inductor, so that the input ac voltage can be converted into the dc voltage through the rectifying unit, and the ripple in the input voltage is filtered out through the filtering unit, so that the stable input voltage can be obtained.
In one embodiment, as shown in fig. 9, the filtering unit 802 is used for filtering the voltage output by the rectifying unit 801. In this case, the input terminal of the filtering unit 802 is connected to the output terminal of the rectifying unit 801, so that the voltage processed by the filtering unit 802 is a single-phase pulsating dc voltage output by the rectifying unit 801, thereby filtering out the ripple in the output voltage of the rectifying unit 801.
In the above embodiment, the filtering unit is configured to filter the voltage output by the rectifying unit, so as to filter a ripple of the unidirectional pulse dc voltage output by the rectifying unit, and obtain a stable input voltage.
In one embodiment, as shown in fig. 10, the filtering unit 802 is used for filtering the input voltage of the motor driving circuit, that is, the input power of the motor driving circuit is connected to the input terminal of the filtering unit 802, so that the filtering unit 802 filters the ripple of the input voltage of the motor driving circuit, the output terminal of the filtering unit 802 is connected to the input terminal of the rectifying unit 801, the input voltage of the rectifying unit 801 is the ac voltage with filtered ripple, and the ac voltage with filtered ripple is converted into the dc voltage without ripple by the rectifying unit 801.
In the above embodiment, the filtering unit is configured to filter the input voltage of the motor driving circuit, so as to filter out a ripple of the input voltage of the motor driving circuit, and then output a dc voltage without the ripple through the rectifying unit, so as to obtain a stable input voltage.
An embodiment of the present application further provides a motor, as shown in fig. 11, fig. 11 shows a schematic structural diagram of a motor, where the motor includes a motor body 1101 and a motor driving circuit 1102, the motor body 1101 is connected to the motor driving circuit 1102, and the motor driving circuit 1102 is used for driving the motor 1101 to operate. The motor drive circuit 1102 includes: the power supply comprises a rectification filtering module, a power supply module and a control module which are connected with the rectification filtering module in series, and an energy storage module and an inversion module which are connected with the power supply module in parallel; the inversion module is also connected with the control module; the energy storage module comprises a non-polar capacitor; the inversion module comprises a first three-phase inversion unit, a second three-phase inversion unit and a switch unit, wherein the first three-phase inversion unit and the second three-phase inversion unit are connected in parallel, the switch unit is connected with the second three-phase inversion unit, and the switch unit comprises a first switch and a second switch;
the power supply module is used for outputting a second voltage to the control module under the condition of receiving the first voltage output by the rectifying and filtering module;
the control module is used for outputting a first control signal and a second control signal to the switch unit in the inversion unit, and outputting a third control signal to the first three-phase inversion unit and the second three-phase inversion unit in the inversion unit;
the switch unit is used for being closed when the first control signal is received and used for being opened when the second control signal is received;
the first three-phase inversion unit is used for outputting a first control instruction to the motor under the condition of receiving the third control signal; the first control instruction is used for triggering the motor to run at a first speed;
the second three-phase inversion unit is used for stopping working under the condition that the switch unit is closed; and the controller is used for outputting a second control instruction to the motor when the third control signal is received and the switch unit is switched off; the second control instruction is used for triggering the motor to operate at a second speed; the second speed is greater than the first speed.
In one embodiment, the power module comprises a first diode, a first resistor and a first capacitor connected in series; wherein the content of the first and second substances,
the anode of the first diode is connected with the rectifying and filtering module; the first resistor and the first capacitor are connected with the control module.
In one embodiment, the power module comprises a first diode, a first resistor and a first capacitor connected in series; wherein the content of the first and second substances,
the anode of the first diode is connected with the rectifying and filtering module; and the cathode of the first diode is connected with the control module.
In one embodiment, the power module further comprises a second resistor connected in parallel with the first capacitor.
In one embodiment, the first capacitor is an electrolytic capacitor.
In one embodiment, the rectifying and filtering module comprises a rectifying unit and a filtering unit which are connected in series; the filtering unit comprises a first inductor.
In an embodiment, the filtering unit is configured to filter the voltage output by the rectifying unit.
In an embodiment, the filtering unit is configured to filter an input voltage of the motor driving circuit.
An embodiment of the present application further provides a home appliance, as shown in fig. 12, the home appliance at least includes a motor body 1201 and a motor driving circuit 1202, and the motor driving circuit 1202 is configured to drive the motor body 1201 to operate. The motor drive circuit 1202 includes: the power supply comprises a rectification filtering module, a power supply module and a control module which are connected with the rectification filtering module in series, and an energy storage module and an inversion module which are connected with the power supply module in parallel; the inversion module is also connected with the control module; the energy storage module comprises a non-polar capacitor; the inversion module comprises a first three-phase inversion unit, a second three-phase inversion unit and a switch unit, wherein the first three-phase inversion unit and the second three-phase inversion unit are connected in parallel, the switch unit is connected with the second three-phase inversion unit, and the switch unit comprises a first switch and a second switch;
the power supply module is used for outputting a second voltage to the control module under the condition of receiving the first voltage output by the rectifying and filtering module;
the control module is used for outputting a first control signal and a second control signal to the switch unit in the inversion unit, and outputting a third control signal to the first three-phase inversion unit and the second three-phase inversion unit in the inversion unit;
the switch unit is used for being closed when the first control signal is received and used for being opened when the second control signal is received;
the first three-phase inversion unit is used for outputting a first control instruction to the motor under the condition of receiving the third control signal; the first control instruction is used for triggering the motor to run at a first speed;
the second three-phase inversion unit is used for stopping working under the condition that the switch unit is closed; and the controller is used for outputting a second control instruction to the motor when the third control signal is received and the switch unit is switched off; the second control instruction is used for triggering the motor to operate at a second speed; the second speed is greater than the first speed.
In one embodiment, the power module comprises a first diode, a first resistor and a first capacitor connected in series; wherein the content of the first and second substances,
the anode of the first diode is connected with the rectifying and filtering module; the first resistor and the first capacitor are connected with the control module.
In one embodiment, the power module comprises a first diode, a first resistor and a first capacitor connected in series; wherein the content of the first and second substances,
the anode of the first diode is connected with the rectifying and filtering module; and the cathode of the first diode is connected with the control module.
In one embodiment, the power module further comprises a second resistor connected in parallel with the first capacitor.
In one embodiment, the first capacitor is an electrolytic capacitor.
In one embodiment, the rectifying and filtering module comprises a rectifying unit and a filtering unit which are connected in series; the filtering unit comprises a first inductor.
In an embodiment, the filtering unit is configured to filter the voltage output by the rectifying unit.
In an embodiment, the filtering unit is configured to filter an input voltage of the motor driving circuit.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A motor drive circuit, comprising: the power supply comprises a rectification filtering module, a power supply module and a control module which are connected with the rectification filtering module in series, and an energy storage module and an inversion module which are connected with the power supply module in parallel; the inversion module is also connected with the control module; the energy storage module comprises a non-polar capacitor; the inversion module comprises a first three-phase inversion unit, a second three-phase inversion unit and a switch unit, wherein the first three-phase inversion unit and the second three-phase inversion unit are connected in parallel, the switch unit is connected with the second three-phase inversion unit, and the switch unit comprises a first switch and a second switch;
the power supply module is used for outputting a second voltage to the control module under the condition of receiving the first voltage output by the rectifying and filtering module;
the control module is used for outputting a first control signal and a second control signal to the switch unit in the inversion unit, and outputting a third control signal to the first three-phase inversion unit and the second three-phase inversion unit in the inversion unit;
the switch unit is used for being closed when the first control signal is received and used for being opened when the second control signal is received;
the first three-phase inversion unit is used for outputting a first control instruction to the motor under the condition of receiving the third control signal; the first control instruction is used for triggering the motor to run at a first speed;
the second three-phase inversion unit is used for stopping working under the condition that the switch unit is closed; and the controller is used for outputting a second control instruction to the motor when the third control signal is received and the switch unit is switched off; the second control instruction is used for triggering the motor to operate at a second speed; the second speed is greater than the first speed.
2. The motor drive circuit according to claim 1, wherein the power supply module includes a first diode, a first resistor, and a first capacitor connected in series; wherein the content of the first and second substances,
the anode of the first diode is connected with the rectifying and filtering module; the first resistor and the first capacitor are connected with the control module.
3. The motor drive circuit according to claim 1, wherein the power supply module includes a first diode, a first resistor, and a first capacitor connected in series; wherein the content of the first and second substances,
the anode of the first diode is connected with the rectifying and filtering module; and the cathode of the first diode is connected with the control module.
4. The motor drive circuit of claim 3 wherein the power module further comprises a second resistor in parallel with the first capacitor.
5. A motor drive circuit according to claim 2 or 3, wherein the first capacitor is an electrolytic capacitor.
6. The motor driving circuit according to claim 1, wherein the rectifying and filtering module comprises a rectifying unit and a filtering unit connected in series; the filtering unit comprises a first inductor.
7. The motor drive circuit according to claim 6, wherein the filter unit is configured to filter the voltage output by the rectifier unit.
8. The motor drive circuit according to claim 6, wherein the filter unit is configured to filter an input voltage of the motor drive circuit.
9. The motor is characterized by comprising a motor body and a motor driving circuit; the motor body is connected with the motor driving circuit; the motor driving circuit is used for driving the motor to operate; the motor drive circuit according to any one of claims 1 to 8.
10. The household appliance is characterized by at least comprising a motor driving circuit and a motor body; the motor driving circuit is used for driving the motor body to operate; the motor drive circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023281832.5U CN214799333U (en) | 2020-12-29 | 2020-12-29 | Motor drive circuit, motor and household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023281832.5U CN214799333U (en) | 2020-12-29 | 2020-12-29 | Motor drive circuit, motor and household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214799333U true CN214799333U (en) | 2021-11-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023281832.5U Active CN214799333U (en) | 2020-12-29 | 2020-12-29 | Motor drive circuit, motor and household electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214799333U (en) |
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2020
- 2020-12-29 CN CN202023281832.5U patent/CN214799333U/en active Active
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