CN110071679B - Motor control circuit - Google Patents
Motor control circuit Download PDFInfo
- Publication number
- CN110071679B CN110071679B CN201810065736.5A CN201810065736A CN110071679B CN 110071679 B CN110071679 B CN 110071679B CN 201810065736 A CN201810065736 A CN 201810065736A CN 110071679 B CN110071679 B CN 110071679B
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- Prior art keywords
- circuit
- speed
- switch
- motor
- signal generating
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Classifications
-
- 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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
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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
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
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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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
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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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/28—Arrangements for controlling current
Abstract
The invention discloses a motor control circuit, which comprises a phase line terminal and a zero line terminal which are used for connecting an external alternating current power supply, a rectifying circuit, a speed regulator at least provided with a first speed selection state and a second speed selection state, and a speed control signal generating circuit used for generating a speed control signal corresponding to the speed selection state of the speed regulator; and a motor drive circuit configured to drive the motor at a respective speed in accordance with the speed control signal; the speed regulator, the speed control signal generating circuit and the rectifying circuit are connected in series between the phase line terminal and the zero line terminal.
Description
[ field of technology ]
The invention relates to the technical field of motors, in particular to speed regulation control of a motor.
[ background Art ]
In the existing range hood, a shaded pole motor is generally used for controlling a fan of the range hood, a control circuit of the shaded pole motor is connected with the motor through different resistors to change the rotating speed of the motor, and a user can select the rotating speed of the shaded pole motor through different high-voltage switches. The range hood adopting the shaded pole motor has low working efficiency, and further energy waste is generated.
[ invention ]
An embodiment of the present invention provides a motor control circuit including a phase line terminal and a neutral line terminal for connecting an external ac power supply, a rectifying circuit, a speed regulator having at least a first speed selection state and a second speed selection state, and a speed control signal generating circuit for generating a speed control signal corresponding to the speed selection state of the speed regulator; and a motor drive circuit configured to drive the motor at a respective speed in accordance with the speed control signal; the speed regulator, the speed control signal generating circuit and the rectifying circuit are connected in series between the phase line terminal and the zero line terminal.
Preferably, the speed regulator comprises a first switch and a second switch, the speed control signal generating circuit comprises a first signal generating circuit, the first signal generating circuit comprises a first switch circuit, the first switch circuit and the first switch form a first unidirectional current branch, and a current output end of the first unidirectional current branch is connected with the motor driving circuit.
Preferably, the first switching circuit comprises a third switch and a fourth switch connected in series, wherein the third switch is configured to be turned on in a positive half cycle of the ac power supply, and turned off in a negative half cycle of the ac power supply, and the fourth switch is configured to be turned on when the third switch is turned on.
Preferably, the first signal generating circuit further includes a first step-down device, the first switch and the first step-down device are connected in series between the phase line terminal and one input terminal of the rectifying circuit, and the other input terminal of the rectifying circuit is connected to the neutral line terminal.
Preferably, the speed regulator further comprises a fifth switch, the speed control signal generating circuit further comprises a second signal generating circuit, the second signal generating circuit comprises a second switch circuit, the second switch circuit and the fifth switch form a second unidirectional current branch, and a current output end of the second unidirectional current branch is connected with the motor driving circuit.
Preferably, the first signal generating circuit includes a first voltage dividing circuit connected in series with the first switch circuit, an output end of the first voltage dividing circuit is a current output end of the first unidirectional current branch, the second signal generating circuit includes a second voltage dividing circuit connected in series with the second switch circuit, and an output end of the second voltage dividing circuit is a current output end of the second unidirectional current branch.
Preferably, the first unidirectional current branch and the second unidirectional current branch are connected with the motor driving circuit independently, or the first unidirectional current branch and the second unidirectional current branch are connected with the same input end of the motor driving circuit after passing through a pull-up circuit.
Preferably, the motor driving circuit comprises an inverter circuit and a control circuit, and the control circuit is configured to control the inverter circuit to provide alternating current with corresponding frequency to the motor according to the speed control signal.
Preferably, the speed control signal generating circuit is composed of a resistor and a semiconductor switch.
Preferably, the speed control signal is an analog signal.
Preferably, the rectifying circuit comprises a rectifying bridge, and the external alternating current power supply is input to the rectifying bridge after being reduced in voltage.
Another aspect of the present invention provides a control circuit for a brushless dc motor, including a speed governor having at least a first speed selection state and a second speed selection state, a speed control signal generating circuit for generating a speed control signal corresponding to the speed selection state of the speed governor, and an inverter circuit connected to the brushless dc motor; and a control circuit configured to control the inverter circuit to supply alternating current of a corresponding frequency to the brushless direct current motor in accordance with the speed control signal; wherein the speed control signal is an analog signal.
Preferably, the speed control signal generating circuit is composed of a resistor and a semiconductor switch.
[ description of the drawings ]
FIG. 1 illustrates a motor and its control circuit according to an embodiment of the present invention;
FIG. 2 illustrates a motor control circuit according to another embodiment of the present invention;
FIG. 3 illustrates a motor control circuit according to yet another embodiment of the present invention;
fig. 4 shows a motor and its control circuit according to a further embodiment of the invention.
[ detailed description ] of the invention
The invention is further described below with reference to the drawings and examples.
In fig. 1, a motor control circuit 10 according to an embodiment of the present invention is shown, the motor control circuit 10 being used for, but not limited to, controlling a brushless dc motor, which may be used for driving a range hood fan, a desk fan, etc.
The motor control circuit 10 includes a phase line terminal L and a neutral line terminal N, a rectifying circuit 20, a speed regulator 30, a speed control signal generating circuit 40, and a motor driving circuit 50. The phase line terminal L and the zero line terminal N are used for connecting an external alternating current power supply; the speed governor 30 has at least a first speed selection state and a second speed selection state; a speed control signal generating circuit 40 for generating a speed control signal corresponding to a speed selection state of the speed regulator 30; the motor drive circuit 50 is configured to drive the motor 60 at a corresponding speed in accordance with the speed control signal. In this embodiment, the speed regulator 30, the speed control signal generating circuit 40 and the rectifying circuit 20 are connected in series between the phase line terminal L and the neutral line terminal N.
Fig. 2 shows a motor control circuit 12 according to another embodiment of the present invention, which includes a phase line terminal L and a neutral line terminal N, a rectifying circuit 20, a speed regulator 30, a speed control signal generating circuit 40, and a motor driving circuit 50.
The phase line terminal L and the zero line terminal N are respectively used for connecting a phase line and a zero line of an external alternating current power supply, and preferably, the external alternating current power supply can be 85V-265V mains supply alternating current with the frequency of 50Hz or 60Hz.
The speed regulator 30 is configured to receive user input, and preferably includes a low-speed switch S1, a medium-speed switch S2, and a high-speed switch S3, which are selectively turned on, corresponding to different speed selection states. Three switches may be provided on one of the switch boards, one of the three switches being connected to the phase terminal L at one end. Because of direct connection with an external alternating current power supply, the three switches are all switches with higher voltage withstand level. It will be appreciated that in further embodiments, the governor 30 may have only two of the switches, or may have more than three selection switches, the number of which may be configured as desired.
The speed control signal generating circuit 40 is configured to generate a speed control signal corresponding to a speed selection state of the speed governor 30, and specifically includes a first signal generating circuit and a second signal generating circuit in the present embodiment.
The first signal generating circuit includes a first switch circuit and a first voltage dividing circuit. The first switching circuit is connected in series with the low-speed switch S1 to form a first unidirectional current branch, and a current output terminal (also referred to as a first current output terminal) V1 of the first unidirectional current branch is connected to the motor drive circuit 50. Preferably, the first switching circuit includes a diode D1 and a PNP type triode Q1 connected in series, an anode of the diode D1 is connected to the low-speed switch S1, a cathode is connected to an emitter of the PNP type triode Q1, an anode of the diode D1 is further connected to a first end of a buck resistor R1, and a second end of the buck resistor R1 is connected to the rectifying circuit 20. The base of the PNP triode Q1 is connected with the second end of the voltage dropping resistor R1 through a resistor R2, the collector is grounded through a voltage dividing resistor R3 and a voltage dividing resistor R4, and a node between the voltage dividing resistor R3 and the voltage dividing resistor R4 is used as a first current output end V1 to be connected to the motor driving circuit 50. When the low-speed switch S1 is turned on, the diode D1 is turned on at the positive half cycle of the ac power supply, and turned off at the negative half cycle of the ac power supply, and when the diode D1 is turned on, the PNP transistor Q1 is turned on due to a voltage drop generated between the base and the emitter of the transistor Q1 by the buck resistor R1, and thus the speed control signal generating circuit 40 outputs a first speed control signal from the first current output terminal V1 to the motor driving circuit 50.
The second signal generating circuit includes a second switching circuit and a second voltage dividing circuit. The second switching circuit is connected in series with the medium speed switch S2 to form a second unidirectional current branch, and a current output terminal (also referred to as a second current output terminal) V2 of the second unidirectional current branch is connected to the motor drive circuit 50. Preferably, the second switching circuit includes a diode D2 and a PNP type triode Q2 connected in series, an anode of the diode D2 is connected to the medium speed switch S2, a cathode is connected to an emitter of the PNP type triode Q2, an anode of the diode D2 is further connected to a first end of a buck resistor R5, and a second end of the buck resistor R5 is connected to the rectifying circuit 20. The base electrode of the PNP triode Q2 is connected with the second end of the voltage dropping resistor R5 through a resistor R6, the collector electrode is grounded through a voltage dividing resistor R7 and a voltage dividing resistor R8, and a node between the voltage dividing resistor R7 and the voltage dividing resistor R8 is used as a second current output end V2 to be connected to the motor driving circuit 50. When the medium speed switch S2 is closed, the diode D2 is turned on in the positive half cycle of the ac power supply and turned off in the negative half cycle of the ac power supply, and when the diode D2 is turned on, the PNP transistor Q2 is turned on due to the voltage drop generated between the base and the emitter of the transistor Q2 by the buck resistor R5, and the speed control signal generating circuit 40 outputs the second speed control signal from the second current output terminal V2 to the motor driving circuit 50.
In this example, the high-speed switch S3 is directly connected to the rectifying circuit 20. The first signal generating circuit and the second signal generating circuit are configured to output voltages of different magnitudes to the motor driving circuit 50 when the first unidirectional current branch and the second unidirectional current branch are each turned on. Specifically, the voltage dividing resistors R3 and R4 form a first voltage dividing circuit, the voltage dividing resistors R7 and R8 form a second voltage dividing circuit, and the first current output terminal V1 and the second current output terminal V2 can be controlled to have different output voltages by configuring the resistors R3, R4, R7 and R8, that is, the first speed control signal and the second speed control signal are different, so that the motor driving circuit can distinguish different speed selections. If the motor driving circuit 50 does not detect the first and second speed control signals, it can be determined that the high speed switch S3 is closed, and accordingly the motor 60 is driven to operate at a high speed.
It will be appreciated that in further embodiments, a third signal generating circuit similar to the first and second signal generating circuits may be configured in the speed control signal generating circuit 40 for the high-speed switch S3, so that the third signal generating circuit outputs a third speed control signal to the motor driving circuit 50.
It will be appreciated that in further embodiments, one of the low-speed switch and the medium-speed switch may be directly connected to the rectifying circuit 20, as in the high-speed switch of the above embodiments, and the other of the two switches and the high-speed switch may be respectively connected to the signal generating circuit, so as to output different speed control signals.
It will be appreciated that in further embodiments, the motor drive circuit 50 may only detect whether signals are input to the input terminals ADC1 and ADC2, regardless of the voltage level of the input signals. At this time, the first current output terminal V1 and the second current output terminal V2 may have the same output voltage. The motor drive circuit 50 may control the motor to operate at different speeds in different states, such as ADC1 having an input, ADC2 having an input, and neither ADC1 nor ADC2 having a signal.
It will be appreciated that in this embodiment, the speed control signal generating circuit 40 is composed of a resistor and a semiconductor switch, and the generated speed control signal is an analog signal.
It is understood that in this embodiment, the dropping resistors R1 and R5 may be replaced by capacitors, inductors, diodes, zener diodes, light emitting diodes, triodes, mosfets, thyristors, triacs, thermistors, varistors, transformers, or the like. The first and second PNP transistors Q1 and Q2 may also be replaced by mosfets, thyristors, triacs, relays, or the like.
One input end of the rectifying circuit 20 is connected to the zero line terminal N, and the other input end is connected to the speed control signal generating circuit 40, and the dc voltage output from the output end of the rectifying circuit 20 can be converted (for example, into 5V and 12V dc voltages) and then supplied to the motor driving circuit 50 and the motor 60. In this embodiment, the rectifying circuit 20 may include a protection circuit, a filtering circuit and a rectifying bridge, and the ac power output by the external ac power source is protected by the protection circuit and filtered by the filtering circuit and then output to the rectifying bridge to be converted into dc. In this embodiment, the protection circuit is a Transient Voltage Suppression (TVS) protection circuit to absorb the surge current of the circuit, and the filtering circuit is a bidirectional filter for filtering the common mode electromagnetic interference in the circuit, and suppressing the electromagnetic interference from being emitted outwards.
In this embodiment, three switches of the speed regulator 30 may be provided on one switch board for user operation, and the speed control signal generating circuit 40, the rectifying circuit 20, and the motor driving circuit 50 may be provided on another circuit board. In this embodiment, the same three high-voltage speed regulating switches as those in the prior art may be used, and for products such as a range hood, the speed regulating switches are usually disposed on an operation panel of the range hood, so that the scheme of this embodiment may not need to change the existing operation panel.
The motor driving circuit 50 may include a controller and an inverter circuit. In this embodiment, the controller may be an MCU, and may be configured to sense whether the first and second speed control signals are received, and the inverter circuit may include an inverter bridge, and the controller detects whether the speed control signal generating circuit 40 outputs the first and second speed control signals, and generates a corresponding control signal to control the inverter circuit to convert the dc power output by the rectifying circuit 20 into the ac power with a specific frequency, so that the motor 60 operates at a specific speed. Preferably, the controller and the inverter circuit may be integrated in one motor driving chip.
In other embodiments, the controller may be a specific control IC, as shown in fig. 3, fig. 3 shows a motor control circuit 14 according to another embodiment of the present invention, where the difference between the motor control circuit 12 and the motor control circuit 12 of fig. 2 is that, in the motor control circuit 12, the first unidirectional current branch and the second unidirectional current branch are separately connected to the motor driving circuit 50, when the low-speed switch S1 is closed, the first unidirectional current branch is turned on, the first current output terminal V1 outputs a voltage to the input terminal ADC1 of the motor driving circuit 50, at this time, the second unidirectional current branch is turned off, the second current output terminal V2 does not output a voltage, and when the intermediate switch S2 is closed, the second unidirectional current branch is turned on, the second current output terminal V2 outputs a voltage to the input terminal ADC2 of the motor driving circuit 50, at this time, the first unidirectional current branch is turned off, and the first current output terminal V1 does not output a voltage. In the motor control circuit 14, the first unidirectional current branch and the second unidirectional current branch are connected to the same input terminal of the motor drive circuit 50 via a pull-up circuit. The pull-up circuit includes a diode D3 connected to the first current output terminal V1 and a diode D4 connected to the second current output terminal V2, the cathodes of the diodes D3 and D4 are commonly connected to the input terminal Speed of the motor driving circuit 50, the input terminal Speed of the motor driving circuit 50 is connected to the pull-up voltage VCC through a resistor R9, and the input terminal Speed of the motor driving circuit 50 is grounded to the capacitor C1 through a resistor R10, respectively, which can be understood that the voltage of the pull-up voltage VCC may be 5V, which may be obtained after the direct current output by the rectifying circuit 20 is reduced. When the low-Speed switch S1 is closed and the first unidirectional current branch is on, the diode D3 is on, the second unidirectional current branch is off, the diode D4 is off, the output of the first current output terminal V1 can be transmitted to the input terminal Speed of the motor driving circuit 50, when the intermediate switch S2 is closed and the second unidirectional current branch is on, the diode D4 is on, the first unidirectional current branch is off, the diode D3 is off, and the output of the second current output terminal V2 can be transmitted to the same input terminal Speed of the motor driving circuit 50. At this time, by configuring the resistors R3, R4, R7 and R8, the first current output terminal V1 and the second current output terminal V2 can be controlled to have different output voltages, which are output to the input terminal Speed of the motor driving circuit 50, and the motor driving circuit 50 can control the motor 60 to operate at a low Speed or a medium Speed accordingly according to the received voltages. The capacitor C1 and the resistors R9 and R10 are used to pull up the voltage received by the input Speed. The motor control circuit 14 can save one input port of the motor drive circuit 50 as compared to the motor control circuit 12. It will be appreciated that when the high Speed switch S3 is closed, the input Speed of the motor drive circuit 50 receives a corresponding voltage division according to the configuration of the resistors R9 and R10 due to the pull-up voltage VCC, and that the voltage division is different from the voltage division received by the input Speed when the switch S1 or S2 is on, so that the motor drive circuit 50 can control the motor to operate at high Speed.
A brushless dc motor control circuit 16 according to still another embodiment of the invention is shown in fig. 4, comprising:
a speed governor 30 having at least a first speed selection state and a second speed selection state;
a speed control signal generating circuit 40 for generating a speed control signal corresponding to a speed selection state of the speed regulator 30;
an inverter circuit 52 connected to the brushless dc motor 60; and
a control circuit 54 configured to control the inverter circuit 52 to supply alternating current of a corresponding frequency to the brushless direct current motor 60 in accordance with the speed control signal;
wherein the speed control signal is an analog signal.
Preferably, the speed control signal generating circuit 40 is composed of a resistor and a semiconductor switch.
It will be appreciated that the inverter circuit 52 and the control circuit 54 may constitute a motor drive circuit, and that both parts may physically exist separately or may be integrated into one motor drive chip.
In the present embodiment, the speed control signal generating circuit 40 is composed of a resistor and a semiconductor switch, and the generated speed control signal is an analog signal.
The foregoing examples only illustrate preferred embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that modifications and improvements can be made without departing from the spirit of the invention, such as combining different features of the various embodiments, which are all within the scope of the invention.
Claims (9)
1. A motor control circuit comprising:
a phase line terminal and a neutral line terminal for connecting an external alternating current power supply;
a rectifying circuit;
a speed governor having at least a first speed selection state and a second speed selection state;
a speed control signal generating circuit for generating a speed control signal corresponding to a speed selection state of the speed governor; and
a motor drive circuit configured to drive the motor to operate at a corresponding speed in accordance with the speed control signal;
the speed regulator, the speed control signal generating circuit and the rectifying circuit are connected in series between the phase line terminal and the zero line terminal, and the speed control signal generating circuit consists of a resistor and a semiconductor switch;
the speed regulator comprises a first switch and a second switch, the speed control signal generating circuit comprises a first signal generating circuit, the first signal generating circuit comprises a first switch circuit, the first switch circuit and the first switch form a first unidirectional current branch, and the current output end of the first unidirectional current branch is connected with the motor driving circuit.
2. The motor control circuit of claim 1 wherein the first switching circuit comprises a third switch and a fourth switch in series, wherein the third switch is configured to conduct at a positive half of the ac power source and to be off at a negative half of the ac power source, and wherein the fourth switch is configured to conduct when the third switch is on.
3. The motor control circuit of claim 1 wherein the first signal generating circuit further comprises a first buck converter, the first switch and the first buck converter being connected in series between the phase terminal and one input of the rectifier circuit, the other input of the rectifier circuit being connected to the neutral terminal.
4. The motor control circuit of claim 1 wherein the speed governor further comprises a fifth switch, the speed control signal generating circuit further comprises a second signal generating circuit, the second signal generating circuit comprises a second switching circuit, the second switching circuit and the fifth switch form a second unidirectional current branch, and a current output of the second unidirectional current branch is connected to the motor drive circuit.
5. The motor control circuit of claim 4 wherein the first signal generating circuit comprises a first voltage dividing circuit in series with the first switching circuit, the output of the first voltage dividing circuit being the current output of the first unidirectional current branch, the second signal generating circuit comprising a second voltage dividing circuit in series with the second switching circuit, the output of the second voltage dividing circuit being the current output of the second unidirectional current branch.
6. A motor control circuit according to claim 3 wherein the first unidirectional current branch and the second unidirectional current branch are connected separately to the motor drive circuit independently of each other, or wherein the first unidirectional current branch and the second unidirectional current branch are connected to the same input of the motor drive circuit via a pull-up circuit.
7. The motor control circuit according to any one of claims 1 to 6, wherein the motor drive circuit includes an inverter circuit and a control circuit configured to control the inverter circuit to supply alternating current of a corresponding frequency to the motor in accordance with the speed control signal.
8. A motor control circuit as claimed in any one of claims 1 to 6, wherein the speed control signal is an analogue signal.
9. The motor control circuit according to any one of claims 1 to 6, wherein the rectifying circuit includes a rectifying bridge, and the external ac power is input to the rectifying bridge after being stepped down.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810065736.5A CN110071679B (en) | 2018-01-23 | 2018-01-23 | Motor control circuit |
| DE102019100900.6A DE102019100900A1 (en) | 2018-01-23 | 2019-01-15 | Control circuit for a motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810065736.5A CN110071679B (en) | 2018-01-23 | 2018-01-23 | Motor control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110071679A CN110071679A (en) | 2019-07-30 |
| CN110071679B true CN110071679B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810065736.5A Active CN110071679B (en) | 2018-01-23 | 2018-01-23 | Motor control circuit |
Country Status (2)
| Country | Link |
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| CN (1) | CN110071679B (en) |
| DE (1) | DE102019100900A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319472A (en) * | 2019-07-29 | 2019-10-11 | 广东爱贝尔电气股份有限公司 | One key accelerates smoke exhaust ventilator |
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| CN110071679A (en) | 2019-07-30 |
| DE102019100900A1 (en) | 2019-07-25 |
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