CN110071679A - Circuit for controlling motor - Google Patents
Circuit for controlling motor Download PDFInfo
- Publication number
- CN110071679A CN110071679A CN201810065736.5A CN201810065736A CN110071679A CN 110071679 A CN110071679 A CN 110071679A CN 201810065736 A CN201810065736 A CN 201810065736A CN 110071679 A CN110071679 A CN 110071679A
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- Prior art keywords
- circuit
- motor
- switch
- speed
- control signal
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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
-
- 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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The present invention discloses a kind of circuit for controlling motor, including the phase terminal and zero terminal, rectification circuit, the governor at least with First Speed selection state and second speed selection state, the speed control signal generation circuit for generating speed control signal corresponding with the speed of governor selection state for connecting external ac power source；And it is configured as the motor-drive circuit for driving the motor to run with corresponding speed according to the speed control signal；Wherein, the governor, speed control signal generation circuit and rectification circuit are serially connected between the phase terminal and zero terminal.
Description
[technical field]
The present invention relates to technical field of motors more particularly to the speed regulating controls of motor.
[background technique]
Motor with cup rotor control range hood fan is generallyd use in existing smoke exhaust ventilator, the control circuit of motor with cup rotor is adopted
It is connected to motor with different resistance to change the revolving speed of motor, user can be by different high-voltage switch gears to motor with cup rotor
Revolving speed is selected.The working efficiency of this smoke exhaust ventilator using motor with cup rotor is low, and then generates energy waste.
[summary of the invention]
One embodiment of the invention provides a kind of circuit for controlling motor, including the phase terminal for connecting external ac power source
With zero terminal, rectification circuit, at least with First Speed selection state and second speed selection state governor, for producing
The speed control signal generation circuit of raw speed control signal corresponding with the speed of governor selection state；And matched
It is set to the motor-drive circuit for driving the motor to run with corresponding speed according to the speed control signal；Wherein, the speed regulation
Device, speed control signal generation circuit and rectification circuit are serially connected between the phase terminal and zero terminal.
Preferably, the governor includes first switch and the second switch, the speed control signal generation circuit includes
First signal generating circuit, first signal generating circuit include first switch circuit, the first switch circuit and first
Switch forms the first unidirectional current branch, and the current output terminal of the first unidirectional current branch connects the motor driven electricity
Road.
Preferably, the first switch circuit includes concatenated third switch and the 4th switch, wherein the third switch
It is configured as being connected in the positive half cycle of the AC power source, end in the negative half period of the AC power source, the 4th switch quilt
It is configured to the conducting in the third switch conduction.
Preferably, first signal generating circuit further includes the first reducing transformer, the first switch and the first reducing transformer
It is series between the phase terminal and an input terminal of the rectification circuit, another input terminal of the rectification circuit connects
Connect the zero terminal.
Preferably, the governor further includes the 5th switch, the speed control signal generation circuit further includes the second letter
Number generation circuit, the second signal generation circuit includes second switch circuit, the second switch circuit and the 5th switch shape
At the second unidirectional current branch, the current output terminal of the second unidirectional current branch connects the motor-drive circuit.
Preferably, first signal generating circuit include with concatenated first bleeder circuit of the first switch circuit,
The output end of first bleeder circuit is the current output terminal of the first unidirectional current branch, and the second signal generates electricity
Road include with concatenated second bleeder circuit of the second switch circuit, the output end of second bleeder circuit is described second
The current output terminal of unidirectional current branch.
Preferably, the first unidirectional current branch and the second unidirectional current branch independently of one another with the motor driven
Described in circuit is separately connected or the first unidirectional current branch and the second unidirectional current branch connect after a pull-up circuit
The same input terminal of motor-drive circuit.
Preferably, the motor-drive circuit includes inverter circuit and control circuit, the control circuit be configured as according to
The speed control signal controls the inverter circuit and provides the alternating current of respective frequencies to motor.
Preferably, the speed control signal generation circuit is made of resistance and semiconductor switch.
Preferably, the speed control signal is analog signal.
Preferably, the rectification circuit includes rectifier bridge, the external ac power source is input to the rectification after being depressured
Bridge.
Another aspect of the present invention provides a kind of control circuit of brshless DC motor, including at least has First Speed selection
State and second speed select the governor of state, for generating speed control corresponding with the speed of governor selection state
The speed control signal generation circuit of signal processed, the inverter circuit being connect with the brshless DC motor；And be configured as according to
The speed control signal controls the control circuit that the inverter circuit provides the alternating current of respective frequencies to brshless DC motor；
Wherein, the speed control signal is analog signal.
Preferably, the speed control signal generation circuit is made of resistance and semiconductor switch.
[Detailed description of the invention]
Fig. 1 shows the electric motor and controller circuit of an embodiment according to the present invention；
Fig. 2 shows the circuit for controlling motor of another embodiment according to the present invention；
Fig. 3 shows the circuit for controlling motor of another embodiment according to the present invention；
Fig. 4 shows the electric motor and controller circuit of another embodiment according to the present invention.
[specific embodiment]
The invention will be further described with reference to the accompanying drawings and examples.
The circuit for controlling motor 10 of one embodiment of the invention is shown, the circuit for controlling motor 10 is used for but not only in Fig. 1
It is limited to the control to a brshless DC motor, the brshless DC motor for example can be used for driving range hood fan, desktop
Fan etc..
Circuit for controlling motor 10 includes phase terminal L and zero terminal N, rectification circuit 20, governor 30, speed control letter
Number generation circuit 40 and motor-drive circuit 50.Phase terminal L and zero terminal N is for connecting external ac power source；Governor
30 at least there is First Speed selection state and second speed to select state；Speed control signal generation circuit 40 for generate with
The corresponding speed control signal of speed selection state of the governor 30；Motor-drive circuit 50 is configured as according to the speed
Control signal drive motor 60 is run with corresponding speed.In the present embodiment, the governor 30, speed control signal generation circuit
40 and rectification circuit 20 be serially connected between the phase terminal L and zero terminal N.
Fig. 2 shows the circuit for controlling motor 12 of another embodiment of the present invention, including phase terminal L and zero terminal N, rectification
Circuit 20, governor 30, speed control signal generation circuit 40 and motor-drive circuit 50.
Phase terminal L and zero terminal N is respectively used to the phase line and zero curve of connection external ac power source, preferably, external
AC power source can be the mains AC of 85V~265V, and frequency can be 50Hz or 60Hz.
Governor 30 is for receiving user's input, preferably, including low speed switch S1, middling speed switch S2 and high-speed switch
S3, three are switched on selecting a property, respectively correspond different speed selection states.Three switches can be located at one piece of switchboard
On, wherein one end of three switches is all connected with phase terminal L.Due to being directly connected to external ac power source, three switches are selected
The higher switch of stress levels.It is appreciated that governor 30 can only have two of them switch in more embodiments, or
Person could have more than three selection switches, and the quantity of the switch can according to need configuration.
Speed control signal generation circuit 40 is for generating speed corresponding with the speed of the governor 30 selection state
Signal is controlled, specifically, including the first signal generating circuit and second signal generation circuit in present embodiment.
First signal generating circuit includes first switch circuit and the first bleeder circuit.First switch circuit and low speed switch
S1 series connection forms the first unidirectional current branch, current output terminal (also referred to as the first electric current output of the first unidirectional current branch
End) the V1 connection motor-drive circuit 50.Preferably, first switch circuit includes three pole concatenated diode D1 and positive-negative-positive
The anode of pipe Q1, diode D1 connect low speed switch S1, and cathode connects the emitter of PNP type triode Q1, the sun of diode D1
Pole is also connected with the first end of dropping resistor R1, and the second end of dropping resistor R1 connects rectification circuit 20.The base of PNP type triode Q1
Second end of the pole through resistance R2 connection dropping resistor R1, collector are grounded through divider resistance R3 and divider resistance R4, and described point
Node between piezoresistance R3 and divider resistance R4 is connected to motor-drive circuit 50 as the first current output terminal V1.Work as low speed
When switch S1 is closed, diode D1 is connected in the positive half cycle of AC power source, ends in the negative half period of AC power source, and work as diode
When D1 is connected, due to the pressure drop of generation of the dropping resistor R1 between the base stage and emitter of triode Q1, PNP type triode Q1
Conducting, and then the speed control signal generation circuit 40 exports first from the first current output terminal V1 to motor-drive circuit 50
Speed control signal.
Second signal generation circuit includes second switch circuit and the second bleeder circuit.Second switch circuit and middling speed switch
S2 series connection forms the second unidirectional current branch, current output terminal (also referred to as the second electric current output of the second unidirectional current branch
End) the V2 connection motor-drive circuit 50.Preferably, second switch circuit includes three pole concatenated diode D2 and positive-negative-positive
The anode of pipe Q2, diode D2 connect middling speed switch S2, and cathode connects the emitter of PNP type triode Q2, the sun of diode D2
Pole is also connected with the first end of dropping resistor R5, and the second end of dropping resistor R5 connects rectification circuit 20.The base of PNP type triode Q2
Second end of the pole through resistance R6 connection dropping resistor R5, collector are grounded through divider resistance R7 and divider resistance R8, and described point
Node between piezoresistance R7 and divider resistance R8 is connected to motor-drive circuit 50 as the second current output terminal V2.Work as middling speed
When switch S2 is closed, diode D2 is connected in the positive half cycle of AC power source, ends in the negative half period of AC power source, and work as diode
When D2 is connected, due to the pressure drop of generation of the dropping resistor R5 between the base stage and emitter of triode Q2, PNP type triode Q2
Conducting, and then the speed control signal generation circuit 40 exports second from the second current output terminal V2 to motor-drive circuit 50
Speed control signal.
In this example, high-speed switch S3 is directly connected to rectification circuit 20.First signal generating circuit and second signal generate electricity
Road is configured as when the first unidirectional current branch and the second unidirectional current branch are respectively connected, and output to the motor is driven
Move the of different sizes of the voltage of circuit 50.Specifically, divider resistance R3 and R4 form the first bleeder circuit, divider resistance R7 and R8
The second bleeder circuit is formed, by configuring resistance R3, R4, R7 and R8, can control the first current output terminal V1 and the second electric current defeated
Outlet V2 has different output voltages, i.e. First Speed control signal is different with second speed control signal, and motor drives as a result,
Dynamic circuit can distinguish different speed selections.If the first, second speed control signal is not detected in motor-drive circuit 50,
It can determine that high-speed switch S3 is closed, correspondingly driving motor 60 is run at high speed.
It is appreciated that high-speed switch S3 can also be given in speed control signal generation circuit 40 in more embodiments
The third signal generating circuit similar with the first, second signal generating circuit is configured, drives third signal generating circuit to motor
Dynamic circuit 50 exports third speed and controls signal.
It is appreciated that one in low speed switch and middling speed switch can also be made as above-mentioned implementation in more embodiments
The high-speed switch of example is equally directly connected to rectification circuit 20, and is separately connected another and high-speed switch in this two switches
Signal generating circuit, and then export different speed control signals.
It is appreciated that in more embodiments, motor-drive circuit 50 can detection input ADC1 and ADC2 whether
There is signal input, and it is unrelated with the voltage swing of input signal.At this point, the first current output terminal V1 and the output of the second electric current
End V2 can have identical output voltage.There are input, ADC2 to have input and ADC1 and the equal no signal of ADC2 etc. no in ADC1
With under state, motor-drive circuit 50 can control motor and run at different rates.
It should be understood that speed control signal generation circuit 40 is made of resistance and semiconductor switch in the present embodiment, it is raw
At speed control signal be analog signal.
It is appreciated that the present embodiment in, dropping resistor R1 and R5 can by capacitor, inductance, diode, Zener diode,
Light emitting diode, triode, metal-oxide half field effect transistor, thyristor, bidirectional thyristor, electro-hot regulator, rheostat or transformation
Device etc. replaces.First, second PNP type triode Q1 and Q2 can also be by metal-oxide half field effect transistor, thyristor, bidirectional thyristor
Or relay etc. replaces.
One input terminal of rectification circuit 20 connects zero terminal N, another input terminal connection speed controls signal and generates
Circuit 40, the rectification circuit 20 output end output DC voltage can by conversion (such as be converted to 5V, 12V DC electricity
Pressure) after be supplied to motor-drive circuit 50 and supply electricity to motor 60.It may include protection in the present embodiment, in rectification circuit 20
The alternating current of circuit, filter circuit and rectifier bridge, external ac power source output is filtered through protection circuit protection and filter circuit
Output to rectifier bridge and then is converted to direct current after wave.In present embodiment, the protection circuit is that transient voltage inhibits (TVS) to protect
Protection circuit, with the surge current of absorbing circuit, the filter circuit is a bidirectional filter, for the common mode electricity in filtering circuit
Magnetic disturbance, while inhibiting itself not send out electromagnetic interference.
In the present embodiment, three switches of governor 30 can be located on one piece of switchboard for user's operation, speed control
Signal generating circuit 40, rectification circuit 20 and motor-drive circuit 50 may be provided on another piece of circuit board.It can be in the present embodiment
Using with identical three high pressure speed-regulating switch in the prior art, for products such as such as smoke exhaust ventilators, speed-regulating switch is usually set
On smoke exhaust ventilator operation panel, therefore, the scheme of the present embodiment may not necessarily change existing operation panel.
Motor-drive circuit 50 may include controller and inverter circuit.In present embodiment, controller can be a MCU,
The first, second speed control signal whether is received for sensing, inverter circuit may include inverter bridge, and controller detects speed
Whether controlling the first, second speed control signal of output of signal generating circuit 40, it is electric to generate corresponding control signal control inversion
The alternating current that the direct current that rectification circuit 20 exports is converted to specific frequency is supplied motor 60 by road, makes motor 60 with specific speed
Operation.Preferably, controller and inverter circuit can integrate in a motor drive ic.
In other embodiments, the controller can also be a specific control IC, as shown in figure 3, Fig. 3 shows this
It is in place of the difference of circuit for controlling motor 12 of the circuit for controlling motor 14 of invention another embodiment, the present embodiment and Fig. 2, motor
In control circuit 12, the first unidirectional current branch and the second unidirectional current branch are distinguished with motor-drive circuit 50 independently of one another
Connection, when low speed switch S1 closure, the first unidirectional current branch conducting, the first current output terminal V1 output voltage to motor is driven
The input terminal ADC1 of dynamic circuit 50, the second unidirectional current branch is to disconnect at this time, the second current output terminal V2 Non voltage output,
When middling speed switch S2 closure, the conducting of the second unidirectional current branch, the second current output terminal V2 output voltage to motor driven electricity
The input terminal ADC2 on road 50, the first unidirectional current branch is to disconnect at this time, the first current output terminal V1 Non voltage output.In electricity
In machine control circuit 14, the first unidirectional current branch and the second unidirectional current branch are through pull-up circuit connection motor-drive circuit
The 50 same input terminal.The pull-up circuit include with the first current output terminal V1 diode D3 connecting and with the second electric current
The diode D4 of output end V2 connection, the cathode of diode D3, D4 are commonly connected to the input terminal of motor-drive circuit 50
The input terminal Speed of Speed, the motor-drive circuit 50 pass through pull-up voltage VCC in resistance R9 connection, the motor driven electricity
The input terminal Speed on road 50 is also grounded by resistance R10 and capacitor C1 respectively, it is possible to understand that, the voltage of upper pull-up voltage VCC can
Think 5V, is obtained after the direct current decompression that can be exported for conversion circuit 20.When low speed switch S1 closure and the first unidirectional electricity
When flowing branch conducting, diode D3 conducting, the second unidirectional current branch is to disconnect at this time, diode D4 cut-off, the first electric current
The output of output end V1 can reach the input terminal Speed of motor-drive circuit 50, when middling speed switch S2 closure and the second unidirectional electricity
When flowing branch conducting, diode D4 conducting, the first unidirectional current branch is to disconnect at this time, diode D3 cut-off, the second electric current
The output of output end V2 can reach the same input terminal Speed of motor-drive circuit 50.At this point, by configure resistance R3, R4,
R7 and R8 can control the first current output terminal V1 and the second current output terminal V2 to have different output voltages, described different
Output voltage is exported to the input terminal Speed of motor-drive circuit 50, and voltage is not based on the received for the motor-drive circuit 50
It is correspondingly run with motor 60 is controlled in turn with low speed or middling speed.The capacitor C1, resistance R9 and R10 are for drawing high input terminal
The received voltage of Speed.Compared with circuit for controlling motor 12, circuit for controlling motor 14 can save the one of motor-drive circuit 50
A input port.It should be understood that when high-speed switch S3 is closed, due to the presence of upper pull-up voltage VCC, the motor driven
The input terminal Speed of circuit 50 receives corresponding partial pressure according to the configuration of resistance R9 and R10, it is possible to understand that, the partial pressure it is big
The partial pressure that input terminal Speed is received when the small conducting from switch S1 or S2 is different, in this way, motor-drive circuit 50 can control electricity
Machine is run at high speed.
The brushless DC motor control circuit 16 of yet another embodiment of the invention is shown in Fig. 4, comprising:
At least there is governor 30 First Speed selection state and second speed to select state；
Speed control signal generation circuit 40, for generating speed corresponding with the speed of the governor 30 selection state
Control signal；
The inverter circuit 52 being connect with brshless DC motor 60；And
Control circuit 54 is configured as mentioning according to speed control signal control inverter circuit 52 to brshless DC motor 60
For the alternating current of respective frequencies；
Wherein, the speed control signal is analog signal.
Preferably, speed control signal generation circuit 40 is made of resistance and semiconductor switch.
It is appreciated that inverter circuit 52 and control circuit 54 constitute motor-drive circuit, two parts physically can be with
It is individually present, also can integrate in a motor drive ic.
In the present embodiment, speed control signal generation circuit 40 is made of resistance and semiconductor switch, the speed control of generation
Signal processed is analog signal.
Above embodiments only express the preferred embodiment of the present invention, and the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as.It should be pointed out that for those of ordinary skill in the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, such as special to the difference in each embodiment
Sign is combined, and these are all within the scope of protection of the present invention.
Claims (13)
1. a kind of circuit for controlling motor, comprising:
For connecting the phase terminal and zero terminal of external ac power source；
Rectification circuit；
At least there is governor First Speed selection state and second speed to select state；
Speed control signal generation circuit is believed for generating speed control corresponding with the speed of governor selection state
Number；And
Motor-drive circuit is configured as driving the motor to run with corresponding speed according to the speed control signal；
Wherein, the governor, speed control signal generation circuit and rectification circuit are serially connected with the phase terminal and zero line side
Between son.
2. circuit for controlling motor as described in claim 1, which is characterized in that the governor includes that first switch and second open
It closes, the speed control signal generation circuit includes the first signal generating circuit, and first signal generating circuit includes first
Switching circuit, the first switch circuit and first switch form the first unidirectional current branch, the first unidirectional current branch
Current output terminal connect the motor-drive circuit.
3. circuit for controlling motor as claimed in claim 2, which is characterized in that the first switch circuit includes concatenated third
Switch and the 4th switch, wherein the third switch is configured as being connected in the positive half cycle of the AC power source, in the exchange
The negative half period of power supply ends, and the 4th switch is configured as the conducting in the third switch conduction.
4. circuit for controlling motor as claimed in claim 2, which is characterized in that first signal generating circuit further includes first
Reducing transformer, the first switch and the first reducing transformer be series at the phase terminal and the rectification circuit an input terminal it
Between, another input terminal of the rectification circuit connects the zero terminal.
5. circuit for controlling motor as claimed in claim 2, which is characterized in that the governor further includes the 5th switch, described
Speed control signal generation circuit further includes second signal generation circuit, and the second signal generation circuit includes second switch electricity
Road, the second switch circuit and the 5th switch form the second unidirectional current branch, the electric current of the second unidirectional current branch
Output end connects the motor-drive circuit.
6. circuit for controlling motor as claimed in claim 5, which is characterized in that first signal generating circuit include with it is described
Concatenated first bleeder circuit of first switch circuit, the output end of first bleeder circuit are the first unidirectional current branch
Current output terminal, the second signal generation circuit includes and concatenated second bleeder circuit of the second switch circuit, institute
The output end for stating the second bleeder circuit is the current output terminal of the second unidirectional current branch.
7. circuit for controlling motor as claimed in claim 4, which is characterized in that the first unidirectional current branch and second is unidirectionally
Current branch is separately connected independently of one another with the motor-drive circuit or the first unidirectional current branch and second single
The same input terminal of the motor-drive circuit is connected after a pull-up circuit to current branch.
8. circuit for controlling motor as described in any one of claim 1 to 7, which is characterized in that the motor-drive circuit includes
Inverter circuit and control circuit, the control circuit are configured as controlling the inverter circuit to electricity according to the speed control signal
The alternating current of machine offer respective frequencies.
9. circuit for controlling motor as described in any one of claim 1 to 7, which is characterized in that the speed control signal generates
Electric routing resistance and semiconductor switch composition.
10. circuit for controlling motor as described in any one of claim 1 to 7, which is characterized in that the speed control signal is mould
Quasi- signal.
11. circuit for controlling motor as described in any one of claim 1 to 7, which is characterized in that the rectification circuit includes rectification
Bridge, the external ac power source are input to the rectifier bridge after being depressured.
12. a kind of control circuit of brshless DC motor, comprising:
At least there is governor First Speed selection state and second speed to select state；
Speed control signal generation circuit is believed for generating speed control corresponding with the speed of governor selection state
Number；
The inverter circuit being connect with the brshless DC motor；And
Control circuit is configured as controlling the inverter circuit according to the speed control signal to brshless DC motor offer correspondence
The alternating current of frequency；
Wherein, the speed control signal is analog signal.
13. control circuit as claimed in claim 12, which is characterized in that the speed control signal generation circuit by resistance and
Semiconductor switch composition.
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 true CN110071679A (en) | 2019-07-30 |
| CN110071679B CN110071679B (en) | 2023-10-20 |
Family
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Family Applications (1)
| 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 |
|---|---|
| CN (1) | CN110071679B (en) |
| DE (1) | DE102019100900A1 (en) |
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| DE102019100900A1 (en) | 2019-07-25 |
| CN110071679B (en) | 2023-10-20 |
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