CN104753404B - Fan motor brake gear and its control method - Google Patents
Fan motor brake gear and its control method Download PDFInfo
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- CN104753404B CN104753404B CN201310731819.0A CN201310731819A CN104753404B CN 104753404 B CN104753404 B CN 104753404B CN 201310731819 A CN201310731819 A CN 201310731819A CN 104753404 B CN104753404 B CN 104753404B
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Abstract
The invention discloses a kind of fan motor brake gear to provide the brake protection before a fan motor starts, a change-over circuit, a brake enable circuit, a brake relieving circuit and a fan motor start-up circuit are included.The change-over circuit has multiple power switch components, and is electrically connected with the fan motor.The brake enable circuit connects the change-over circuit；The brake relieving circuit connects the brake enable circuit.The fan motor start-up circuit receives an external dc voltage.When the brake enable circuit receives the external dc voltage, the brake enable circuit produces a brake control signal and turns on those power switch components, to be braked to the fan motor.
Description
Technical field
The present invention relevant a kind of fan motor brake gear and its control method, before espespecially a kind of startup with fan motor
The fan motor brake gear and its control method of brake defencive function.
Background technology
Refer to the circuit diagram that the fan motor that Fig. 1 Fig. 1 is prior art drives.As illustrated, the fan motor
Drive circuit structure includes a change-over circuit 10A, a drive control device 20A and a fan motor 50A.Change-over circuit 10A
With multiple power switch component Q1~Q6, and it is electrically connected with fan motor 50A.Using fan motor 50A as a three-phase
Exemplified by d.c. motor, change-over circuit 10A is three groups of bridge arm frameworks in parallel each other, and each group of bridge arm is by two power switch
Element is connected in series.Change-over circuit 10A receives an external dc voltage Vdc, and is converted to the electricity needed for fan motor 50A
Power.Furthermore drive control device 20A produce to should six switch element Q1~Q6 six switching drive signal Sd1~
Sd6, and by switching and driving those switch elements Q1~Q6 so that fan motor 50A is operated.
Typically, the above-mentioned fan motor can be applied to servomechanism computer room as air conditioner and radiating use.However, due to watching
It is different from behaviour in service to take the setting of servo in device computer room, therefore, the fan motor of not actuated operating is easily by ambient wind
Return air caused by fan motor is influenceed, and causes to start the unstable state before operating, more very return air will make it that fan motor is inverse
Turn, in this way, fan motor will be caused, which persistently to reverse, smoothly to be started or even burn.
Therefore, a kind of fan motor brake gear and its control method how are designed, is braked and filled by the fan motor
Put, to ensure fan motor before activation for halted state so that reason external force does not reverse and causes to burn or nothing fan motor
Method smoothly starts；And simple electronic component is utilized, realizes the brake protection before fan motor startup, the brake after stopping of braking
Car release and fan motor startup operating, can simple circuit design under conditions of, reach high accurancy and precision brake protection,
The control of operating is released and started, is that the capable big problem for overcoming and solving is intended to by inventor.
The content of the invention
The purpose of the present invention is to provide a kind of fan motor brake gear, to provide the brake before a fan motor starts
Car is protected.The fan motor brake gear includes a change-over circuit, a brake enable circuit, a brake relieving circuit and a wind
Fan motor starting circuit.The change-over circuit has multiple power switch components, and is electrically connected with the fan motor；Wherein those
Power switch component forms multigroup upper and lower bridge arm circuit framework.The brake enable circuit connects the change-over circuit, and receives one
External dc voltage.The brake relieving circuit connects the brake enable circuit, and receives the external dc voltage, with to the brake
One first resistor possessed by car relieving circuit-condenser network charging.The fan motor start-up circuit receives the external dc electricity
Pressure.Wherein, when the brake enable circuit receives the external dc voltage, the brake enable circuit produces a brake control signal
Those power switch components of the lower bridge arm of conducting, to be braked to the fan motor；The enable after first resistor-condenser network charging
The brake relieving circuit, to stop brake enable circuit output brake control signal cut-off lower bridge arm those power switch member
Part, and then release fan motor brake.
Another object of the present invention is to provide a kind of fan motor brake gear, before fan motor startup to be provided
Brake protection.The fan motor brake gear includes a change-over circuit, a brake enable circuit, a brake relieving circuit and one
Fan motor start-up circuit.The change-over circuit has multiple power switch components, multiple auxiliary power switch elements and multiple
Current-limiting resistance, and it is electrically connected with the fan motor；Wherein those power switch components form multigroup upper and lower bridge arm circuit framework,
And by the current-limiting resistance, the power switch component is connected each auxiliary power switch element with one of lower bridge arm.
The brake enable circuit connects the change-over circuit, and receives an external dc voltage.The brake relieving circuit connects the brake
Enable circuit, and the external dc voltage is received, with to one first resistor-condenser network possessed by the brake relieving circuit
Charging.The fan motor start-up circuit receives the external dc voltage.Wherein, when the brake enable circuit receives the external dc
During voltage, the brake enable circuit produces a brake control signal and turns on the plurality of auxiliary power switch element, with to the fan
Motor brake；The enable brake relieving circuit, defeated to stop the brake enable circuit after first resistor-condenser network charging
Go out the brake control signal and end those auxiliary power switch elements, and then release fan motor brake.
The yet another object of the present invention is to provide a kind of fan motor brake gear control method, to provide a fan horse
Up to the brake protection before startup.The control method comprises the steps of：(a) conversion with multiple power switch components is provided
Circuit, the wherein change-over circuit are electrically connected with the fan motor；And the brake enable circuit of (b) external dc voltage conducting one,
Those power switch components are turned on to produce a brake control signal, and then the fan motor is braked.
In order to be further understood that the present invention to reach technology, means and effect that predetermined purpose is taken, refers to
Below in connection with detailed description of the invention and accompanying drawing, it is believed that the purpose of the present invention, feature and feature, when can thus one deeply and
It is specific to understand, but institute's accompanying drawings are only provided and used with reference to explanation, are not used for being any limitation as the present invention.
Brief description of the drawings
Fig. 1 is the circuit diagram that the fan motor of prior art drives；
Fig. 2A is circuit module schematic diagram of the fan motor brake gear of the present invention in a preferred embodiment；
Fig. 2 B are circuit module schematic diagram of the fan motor brake gear of the present invention in another preferred embodiment；
Fig. 3 is the circuit diagram of fan motor brake gear of the present invention；And
Fig. 4 is the flow chart of fan motor brake gear control method of the present invention.
Wherein, description of reference numerals is as follows：
﹝ Xian You Ji Shu ﹞
10A change-over circuits
20A drive control devices
50A fan motors
Vdc external dc voltages
Q1~Q6 power switch components
Sd1~Sd6 switching drive signals
﹝ this Fa Ming ﹞
10 change-over circuits
20 brake enable circuits
30 brake relieving circuits
40 fan motor start-up circuits
50 fan motors
Df diodes
The power switch components of Q1 first
The power switch components of Q2 second
The power switch components of Q3 the 3rd
The power switch components of Q4 the 4th
The power switch components of Q5 the 5th
The power switch components of Q6 the 6th
Q2 ' the first auxiliary power switch elements
Q4 ' the second auxiliary power switch elements
The auxiliary power switch elements of Q6 ' the 3rd
The current-limiting resistances of R2 first
The current-limiting resistances of R4 second
The current-limiting resistances of R6 the 3rd
Vcc external dc voltages
Sc brake control signals
R30 brakes release resistance
C30 brakes release electric capacity
R40 starts resistance
C40 start-up capacitances
Q201 first brake enable power switch
The brake enable power switch of Q202 second
Q30 brakes release power switch
The startup powers of Q401 first switch
The startup powers of Q402 second switch
S10~S40 steps
Embodiment
Hereby the technical content and a detailed description for the present invention, schema is coordinated to be described as follows：
It is circuit module schematic diagram of the fan motor brake gear of the present invention in a preferred embodiment to refer to Fig. 2A.Should
Fan motor brake gear provides the brake protection before a fan motor 50 starts.The fan motor brake gear includes a conversion
The brake fan motor start-up circuit 40 of relieving circuit 30 and one of the brake enable of circuit 10, one circuit 20, one.The change-over circuit 10
With multiple power switch components, and it is electrically connected with the fan motor 50.
As shown in Figure 2 A, in this preferred embodiment, the fan motor 50 is a three-phase dc motor (three-phase
DC motor), therefore, the corresponding change-over circuit 10 is three groups of bridge arm frameworks in parallel each other, and each group of bridge arm is by two
Power switch component is connected in series.That is, one first power switch component Q1 and one second power switch component Q2 be connected in series
Form one first bridge arm (not indicating)；One the 3rd power switch component Q3 and one the 4th power switch component Q4 is connected in series to form
One second bridge arm (not indicating)；One the 5th power switch component Q5 and one the 6th power switch component Q6 is connected in series to form one
Three bridge arms (do not indicate).Furthermore the phase at each switch element electrical connection of bridge arm two respectively with the fan motor 50 electrically connects
Connect, to form the control framework of a three-phase dc motor.It is worth mentioning, the present invention is not with the control of the above-mentioned three-phase dc motor
Framework processed is any limitation as, and the fan motor 50 can be a single-phase DC motor (single-phase DC motor), and with it is right
The change-over circuit 10 answered forms the control framework of a single-phase DC motor.
The brake enable circuit 20 connects the change-over circuit 10, and receives an external dc voltage Vcc.It is more specific and
Speech, the brake enable circuit 20 connect second power switch component Q2, the 4th power switch component of the change-over circuit 10
Q4 and the 6th power switch component Q6.The brake relieving circuit 30 connects the brake enable circuit 20, and it is outer to receive this
Portion DC voltage Vcc.The fan motor start-up circuit 40 receives external dc voltage Vcc.
When external dc voltage Vcc turns on the brake enable circuit 20, the brake enable circuit 20 produces a brake
Control signal Sc turns on those power switch components, to be braked to the fan motor 50, it is ensured that the fan motor 50 is before activation
For halted state.More specifically, when external dc voltage Vcc turns on the brake enable circuit 20, brake enable electricity
Road 20 produce brake control signal Sc simultaneously input to second power switch component Q2, the 4th power switch component Q4 with
And the 6th power switch component Q6 grid, with simultaneously turn on second power switch component Q2, the 4th power switch member
Part Q4 and the 6th power switch component Q6 so that three bridge arm is grounded simultaneously, and is braked to the fan motor 50.
Stop when the fan motor 50 brakes, the forbidden energy of the brake relieving circuit 30 brake enable circuit 20, to stop being somebody's turn to do
The enable circuit 20 that brakes exports brake control signal Sc so that ends those power switch components, and then releases the fan horse
Up to 50 brakes.More specifically, stop when the fan motor 50 brakes, the forbidden energy of the brake relieving circuit 30 brake enable circuit
20, stop simultaneously exporting brake control signal Sc to second power switch component Q2, the 4th power switch component Q4 with
And the 6th power switch component Q6 grid so that three bridge arm is not grounded simultaneously, and is released the fan motor 50 and braked.
Braked when the fan motor 50 releases, the fan motor start-up circuit 40 receives external dc voltage Vcc, to start the fan
Motor 50 operates.
More specifically, braked when the fan motor 50 releases, the fan motor start-up circuit 40 receives the external dc
Voltage vcc, to provide the external dc voltage Vcc to the change-over circuit 10, to be converted to the electric power needed for the fan motor 50,
Also, coordinate drive control device (not shown) again, to switch and drive those power switch components so that the fan motor 50 is transported
Turn.Wherein, the fan motor brake gear also includes a diode Df, and diode Df is electrically connected with the change-over circuit 10 with being somebody's turn to do
Between fan motor start-up circuit 40, with ensure the external dc voltage Vcc by the fan motor start-up circuit 40 provide to
The change-over circuit 10, to be converted to the electric power needed for the fan motor 50.
It is worth mentioning, the preferred embodiment shown in Fig. 2A is only an embodiment party of fan motor brake gear of the present invention
Formula, but it is not limited system.It is circuit of the fan motor brake gear of the present invention in another preferred embodiment to refer to Fig. 2 B
Module diagram.Fig. 2 B embodiments and Fig. 2A embodiment maximum difference are：Each group of bridge arm of the change-over circuit 10 is also
Include an auxiliary power switch element and a current-limiting resistance.More specifically, second power switch component Q2 grid
(gate) it is connected by one first current-limiting resistance R2 with one first auxiliary power switch element Q2 ' source electrode (source), also,
First auxiliary power switch element Q2 ' drain electrode (drain) is powered by external dc voltage Vcc.Similarly, the 4th power
Switch element Q4 grid is connected by one second current-limiting resistance R4 with one second auxiliary power switch element Q4 ' source electrode, and
And the second auxiliary power switch element Q4 ' drain electrode is powered by external dc voltage Vcc.Similarly, the 6th power switch
Element Q6 grid is connected by one the 3rd current-limiting resistance R6 with one the 3rd auxiliary power switch element Q6 ' source electrode, also, should
3rd auxiliary power switch element Q6 ' drain electrode is powered by external dc voltage Vcc.It is worth mentioning, first auxiliary power
The grid and the 3rd auxiliary power switch element of switch element Q2 ' grid, the second auxiliary power switch element Q4 '
The brake control signal Sc controls caused by the brake enable circuit 20 simultaneously of Q6 ' grid.Stopped as the fan motor
Car device and its control method, it will be described in more detail later.
Refer to the circuit diagram that Fig. 3 is fan motor brake gear of the present invention.In the embodiment, the brake is further illustrated
The corresponding operation of the circuit element of enable circuit 20, the brake relieving circuit 30 and the fan motor start-up circuit 40.
Wherein, the brake enable circuit 20, the brake relieving circuit 30 and the fan motor start-up circuit 40 can be by electronic circuits
Hardware design is realized, but is not limited system, can also be realized by software or firmware brake that those above-mentioned circuits are provided with
And start the function of the fan motor 50.Hereinafter, will illustrate by taking the hardware design of electronic circuit as an example the brake enable circuit 20,
The brake relieving circuit 30 and the fan motor start-up circuit 40 realize brake and startup that those above-mentioned circuits are provided
The function and principle of the fan motor 50.
The brake enable circuit 20, the brake relieving circuit 30 and the fan motor start-up circuit 40 are opened by power respectively
The electronic circuit components such as element, resistance, electric capacity are closed to be formed.The brake enable circuit 20 mainly includes a first brake enable work(
Rate switchs Q201, one second brake enable power switch Q202 and is electrically connected at first brake enable power switch Q201
With the resistance (not indicating) between second brake enable power switch Q202.The brake relieving circuit 30 is mainly comprising a brake
Release power switch Q30, a brake releases the brakes of resistance R30 and one and releases electric capacity C30.The fan motor start-up circuit 40 is led
To include one first startup power switch Q401, one second startup power switch Q402, a startup resistance R40, a start-up capacitance
C40 and be electrically connected at first startup power switch Q401 and second startup power switch Q402 between resistance (not
Sign).
When the fan motor brake gear receives external dc voltage Vcc, due to brake enable circuit 20, the brake
Car relieving circuit 30 and the fan motor start-up circuit 40 are all directly connected to external dc voltage Vcc, therefore the outside is straight
Stream voltage vcc starts simultaneously to the brake enable circuit 20, the brake relieving circuit 30 and the fan motor start-up circuit 40
Power supply.Because the external dc voltage Vcc powers to the brake enable circuit 20, therefore external dc voltage Vcc conductings should
First brake enable power switch Q201 and second brake enable power switch Q202 so that the brake enable circuit 20 exports
Brake control signal Sc.Be worth mentioning, brake control signal Sc be a high level control signal, therefore input simultaneously to
First auxiliary power switch element Q2 ', the second auxiliary power switch element Q4 ' and the 3rd auxiliary power switch element
Q6 ' grid, opened with simultaneously turning on second power switch component Q2, the 4th power switch component Q4 and the 6th power
Close element Q6 so that three bridge arm is grounded simultaneously, and the fan motor 50 is braked.
In addition, while the external dc voltage Vcc powers to the brake enable circuit 20, also simultaneously to the brake solution
Except circuit 30 and the fan motor start-up circuit 40 are powered, therefore, the external dc voltage Vcc is to the brake relieving circuit 30
The brake releases resistance R30 and brake releasing electric capacity C30 the first RC circuits formed and started to charge up, and on the other hand, this is outer
Portion DC voltage Vcc also the startup resistance R40 and start-up capacitance C40 of the fan motor start-up circuit 40 are formed
Two RC circuits start to charge up.It is worth mentioning, in an embodiment of the present invention, the time constant (time of the 2nd RC circuits
Constant τ 2) design comes long compared with the time constants (τ 1) of the first RC circuits, in other words, τ 2=R40 × C40>τ 1=R30
×C30.Therefore, after the external dc voltage Vcc charges to the first RC circuits and the 2nd RC circuits simultaneously, the first RC electricity
The voltage that brake releasing electric capacity C30 voltage rises compared with start-up capacitance C40 in the 2nd RC circuits in road, which rises, to be come soon.
So when the charging voltage that the brake releases electric capacity C30 reaches enough high voltage level, first turn on brake releasing power and open
Close Q30 so that first brake enable power switch Q201 ends with second brake enable power switch Q202.In this way, should
Brake enable circuit 20 stop exporting simultaneously brake control signal Sc to the first auxiliary power switch element Q2 ', this second
Auxiliary power switch element Q4 ' and the 3rd auxiliary power switch element Q6 ' grid so that three bridge arm does not connect simultaneously
Ground, and release the fan motor 50 and brake.
Then when start-up capacitance C40 charging voltage reaches enough high voltage level, it is then turned on first startup
Power switch Q401 and second startup power switch Q402 so that the external dc voltage Vcc is started by the fan motor
Circuit 40 provides should be to the change-over circuit 10, and coordinates drive control device to switch and drive those power switch components, will be outer
Portion DC voltage Vcc is converted to the electric power needed for the fan motor 50 so that the fan motor 50 operates.
In addition, the change-over circuit 10 shown in Fig. 3 can not also use the side of the auxiliary power switch element and current-limiting resistance
Formula, in other words, brake control signal Sc are directly output to second power switch component Q2, the 4th power switch component Q4
And the 6th power switch component Q6 grid, reach to the fan motor 50 provide start before brake defencive function.Cause
This, can coordinate Fig. 2A corresponding explanation implementation, will not be repeated here.
Refer to the flow chart that Fig. 4 is fan motor brake gear control method of the present invention.The fan motor brake gear
Control method, protected with providing the brake before a fan motor starts.The control method comprises the steps of：First, there is provided tool
There is a change-over circuit of multiple power switch components, the wherein change-over circuit is electrically connected with the fan motor (S10).Wherein, should
Fan motor can be a three-phase dc motor (three-phase DC motor) or a single-phase DC motor (single-phase
DC motor), be not limited system, also, the change-over circuit to should d.c. motor form it is different, can be three-phase or single-phase straight
Flow the control framework of motor.Then, the brake enable circuit of external dc voltage conducting one, is led with producing a brake control signal
Lead to those power switch components, and then the fan motor is braked, it is ensured that the fan motor is halted state before activation
(S20).The brake enable circuit connects the change-over circuit.By taking the control framework of three-phase dc motor as an example, when the brake enable
When circuit receives the external dc voltage, the brake enable circuit output brake control signal simultaneously turns on so that three bridge
Arm is grounded simultaneously, and the fan motor is braked.
Then, brake relieving circuit forbidden energy brake enable circuit, to stop the brake enable circuit output brake
Control signal so that end those power switch components, and then release fan motor brake (S30).More specifically, when this
Fan motor brake stops, the brake relieving circuit forbidden energy brake enable circuit, stops exporting the brake control signal simultaneously,
So that three bridge arm is not grounded simultaneously, and release fan motor brake.Finally, it is outer to receive this for a fan motor start-up circuit
Portion's DC voltage, to start fan motor operating (S40).
It is worth mentioning, above-mentioned the brake enable circuit, the brake relieving circuit and the fan motor start-up circuit can be by
The hardware design of electronic circuit is realized, but is not limited system, can also realize that those above-mentioned circuits are carried by software or firmware
The brake of confession and the function of starting the fan motor.So that the hardware design of electronic circuit is realized as an example, the brake enable circuit,
The brake relieving circuit and the fan motor start-up circuit are respectively by the electronic circuits such as power switch component, resistance, electric capacity member
Part is formed.The brake enable circuit is mainly comprising a first brake enable power switch, one second brake enable power switch
And it is electrically connected at the resistance between the first brake enable power switch and the second brake enable power switch.The brake
Relieving circuit mainly releases power switch comprising a brake, a brake releases resistance and a brake releases electric capacity.The fan horse
Mainly start resistance, a start-up capacitance comprising one first startup power switch, one second startup power switch, one up to start-up circuit
And it is electrically connected at the resistance between first startup power switch and second startup power switch.
When the fan motor brake gear receives the external dc voltage, due to the brake enable circuit, the brake solution
Except circuit and the fan motor start-up circuit are all directly connected to the external dc voltage, therefore the external dc voltage is to the brake
Car enable circuit, the brake relieving circuit and the fan motor start-up circuit start simultaneously at power supply.Due to the external dc electricity
Pressure is powered to the brake enable circuit, therefore the external dc voltage turns on the first brake enable power switch and second brake
Car enable power switch so that the brake enable circuit produces the brake control signal.It is worth mentioning, the brake control signal is
The control signal of one high level, therefore input simultaneously to the underarm switch element of three bridge arms, to simultaneously turn on the underarm of three bridge arms
Switch element so that three bridge arm is grounded simultaneously, and is braked to the fan motor.
In addition, while the external dc voltage is powered to the brake enable circuit, electricity also is released to the brake simultaneously
Road powers with the fan motor start-up circuit, and therefore, the brake of the external dc voltage to the brake relieving circuit releases electricity
Hinder the first RC circuits formed with brake releasing electric capacity to start to charge up, on the other hand, the external dc voltage is also to the wind
The 2nd RC circuits that the startup resistance of fan motor starting circuit is formed with the start-up capacitance start to charge up.It is worth mentioning,
In the present invention, the time constant (time constant τ 2) of the 2nd RC circuits designs the time constant compared with the first RC circuits
(τ 1) comes long, in other words, τ 2>τ1.Therefore, when simultaneously the external dc voltage fills to the first RC circuits with the 2nd RC circuits
After electricity, the voltage of brake releasing electric capacity rises on the voltage compared with the start-up capacitance in the 2nd RC circuits in the first RC circuits
Rise and come soon.So when the charging voltage that the brake releases electric capacity reaches enough high voltage level, brake releasing is first turned on
Power switch so that the first brake enable power switch ends with the second brake enable power switch.In this way, the brake causes
Energy circuit stops exporting the brake control signal simultaneously to second power switch component, the 4th power switch component and is somebody's turn to do
The grid of 6th power switch component so that three bridge arm is not grounded simultaneously, and releases fan motor brake.
Then when the charging voltage of the start-up capacitance reaches enough high voltage level, it is then turned on first startup power
Switch switchs with second startup power so that the external dc voltage is provided by the fan motor start-up circuit should be to this turn
Circuit is changed, and coordinates drive control device to switch and drives those power switch components, external dc voltage Vcc is converted to this
Electric power needed for fan motor causes the fan motor to operate.
In summary, the present invention has following features and advantages：
1st, by the fan motor brake gear, to ensure fan motor before activation for halted state so that fan horse
Being reversed up to not reason external force causes to burn or can not smoothly start；
2nd, using simple electronic component, such as transistor, resistance, electric capacity, realize that the brake before fan motor startup is protected
Brake after shield, brake stopping releases and the startup of fan motor operating, can reach height under conditions of simple circuit design
The brake protection of precision, the control for releasing and starting operating；And
3rd, the fan motor brake gear is applicable to the control framework of three-phase or single-phase DC motor, and the brake causes
Energy circuit 20, the brake relieving circuit 30 and the fan motor start-up circuit 40 can be real by the hardware design institute of electronic circuit
It is existing, brake that those above-mentioned circuits are provided and the function of starting the fan motor 50 can be also realized by software or firmware, is made
The application for obtaining the fan motor brake gear is more elastic, extensive.
Only, described above, the detailed description of preferred embodiment only of the present invention and schema, only feature of the invention is simultaneously
This is not limited to, and is not used to the limitation present invention, all scopes of the invention should apply for a patent right claimed range with following
It is defined, the embodiment of all spirit changes similar with its together in the present patent application scope of the patent claims, should be all contained in this
In the category of invention, any those skilled in the art in the field of the invention, can think easily and change or modification can all contain
Cover the scope of the patent claims in the present invention.
Claims (18)
1. a kind of fan motor brake gear, protected with providing the brake before a fan motor starts, fan motor brake dress
Put and include：
One change-over circuit, there are multiple power switch components, and be electrically connected with the fan motor；Wherein the plurality of power switch
Element forms multigroup upper and lower bridge arm circuit framework；
One brake enable circuit, connects the change-over circuit, and receive an external dc voltage；
One brake relieving circuit, connects the brake enable circuit, and receives the external dc voltage, to release electricity to the brake
One first resistor possessed by road-condenser network charging；And
One fan motor start-up circuit, receive the external dc voltage；
Wherein, when the brake enable circuit receives the external dc voltage, the brake enable circuit produces a brake control letter
Number lower the plurality of power switch component of bridge arm of conducting, to be braked to the fan motor；After the first resistor-condenser network charging
Enable brake relieving circuit when the charging voltage of the electric capacity reaches enough high voltage level, it is defeated to stop the brake enable circuit
Go out the lower the plurality of power switch component of bridge arm of brake control signal cut-off, and then release fan motor brake.
2. fan motor brake gear according to claim 1, wherein when the brake relieving circuit is enabled, the fan
Motor starting circuit receives the external dc voltage, to start fan motor operating.
3. fan motor brake gear according to claim 1, wherein the brake enable circuit cause comprising a first brake
Can power switch and one second brake enable power switch；Wherein the first brake enable power switch connects second brake and caused
Can power switch；And the brake control signal is exported by the first brake enable power switch.
4. fan motor brake gear according to claim 3, wherein the brake relieving circuit include a brake and release work(
Rate switch, a brake release resistance and a brake releases electric capacity；Wherein the brake releases resistance and releases electric capacity shape with the brake
Into the first resistor-condenser network, then release power switch with the brake and be electrically connected with.
5. fan motor brake gear according to claim 4, wherein the fan motor start-up circuit open comprising one first
Dynamic power switch, one second startup power switch, one start resistance and a start-up capacitance；Wherein the startup resistance and the startup
Electric capacity forms one second resistance-condenser network, then switchs and be electrically connected with second startup power.
6. fan motor brake gear according to claim 5, the time constant of the wherein second resistance-condenser network are big
In the time constant of the first resistor-condenser network.
7. fan motor brake gear according to claim 6, wherein when the brake relieving circuit is enabled, the fan
Motor starting circuit receives the external dc voltage, to start fan motor operating.
8. fan motor brake gear according to claim 1, wherein the fan motor brake gear also include：
One diode, it is electrically connected between the change-over circuit and the fan motor start-up circuit, to ensure the external dc voltage
There is provided by the fan motor start-up circuit to the change-over circuit, to be converted to the electric power needed for the fan motor.
9. fan motor brake gear according to claim 1, the wherein fan motor are a three-phase dc motor or one
Single-phase DC motor, and the change-over circuit should be a three-phase circuit framework or a single-phase circuit framework relatively.
10. a kind of fan motor brake gear, protected with providing the brake before a fan motor starts, fan motor brake dress
Put and include：
One change-over circuit, there is multiple power switch components, multiple auxiliary power switch elements and multiple current-limiting resistances, and
It is electrically connected with the fan motor；Wherein the plurality of power switch component forms multigroup upper and lower bridge arm circuit framework, and it is each should
By the current-limiting resistance, the power switch component is connected auxiliary power switch element with one of lower bridge arm；
One brake enable circuit, connects the change-over circuit, and receive an external dc voltage；
One brake relieving circuit, connects the brake enable circuit, and receives the external dc voltage, to release electricity to the brake
One first resistor possessed by road-condenser network charging；And
One fan motor start-up circuit, receive the external dc voltage；
Wherein, when the brake enable circuit receives the external dc voltage, the brake enable circuit produces a brake control letter
Number the plurality of auxiliary power switch element of conducting, to be braked to the fan motor；Should after the first resistor-condenser network charging
Enable brake relieving circuit when the charging voltage of electric capacity reaches enough high voltage level, to stop the brake enable circuit output
The brake control signal ends the plurality of auxiliary power switch element, and then releases fan motor brake.
11. fan motor brake gear according to claim 10, wherein the brake enable circuit include a first brake
Enable power switch and one second brake enable power switch；Wherein the first brake enable power switch connects second brake
Enable power switch；And the brake control signal is exported by the first brake enable power switch；The brake relieving circuit bag
Power switch is released containing a brake, a brake releases resistance and a brake releases electric capacity；Wherein the brake releases resistance with being somebody's turn to do
Brake releases electric capacity and forms the first resistor-condenser network, then releases power switch with the brake and be electrically connected with；The wherein fan
Motor starting circuit includes one first startup power switch, one second startup power switch, a startup resistance and a startup electricity
Hold；Wherein the startup resistance forms one second resistance-condenser network with the start-up capacitance, then switchs electricity with second startup power
Property connection.
12. fan motor brake gear according to claim 11, the wherein time constant of the second resistance-condenser network
More than the time constant of the first resistor-condenser network.
13. a kind of fan motor brake gear control method, protected with providing the brake before a fan motor starts, the controlling party
Method comprises the steps of：
(a) change-over circuit with multiple power switch components is provided, the wherein change-over circuit is electrically connected with the fan motor；
(b) the brake enable circuit of external dc voltage conducting one, opened with producing the plurality of power of brake control signal conducting
Element is closed, and then the fan motor is braked；
(c) brake relieving circuit forbidden energy brake enable circuit, to stop the brake enable circuit output brake control letter
Number so that end the plurality of power switch component, and then release fan motor brake；And
(d) a fan motor start-up circuit provides the external dc voltage to the change-over circuit, to start fan motor fortune
Turn,
Wherein the brake enable circuit includes a first brake enable power switch and one second brake enable power switch；Wherein
The first brake enable power switch connects the second brake enable power switch；And the brake control signal first is stopped by this
Car enable power switch exports.
14. fan motor brake gear control method according to claim 13, wherein the brake relieving circuit include one
Brake releases power switch, a brake releases resistance and a brake releases electric capacity；Wherein the brake releases resistance and the brake
Release electric capacity and form one first resistor-condenser network, then release power switch with the brake and be electrically connected with.
15. fan motor brake gear control method according to claim 14, wherein the fan motor start-up circuit bag
Start resistance and a start-up capacitance containing one first startup power switch, one second startup power switch, one；Wherein startup electricity
Resistance forms one second resistance-condenser network with the start-up capacitance, then switchs and be electrically connected with second startup power.
16. fan motor brake gear control method according to claim 15, the wherein second resistance-condenser network
Time constant is more than the time constant of the first resistor-condenser network.
17. fan motor brake gear control method according to claim 13, wherein the fan motor brake gear are also
Comprising：
One diode, it is electrically connected between the change-over circuit and the fan motor start-up circuit, to ensure the external dc voltage
There is provided by the fan motor start-up circuit to the change-over circuit, to be converted to the electric power needed for the fan motor.
18. fan motor brake gear control method according to claim 13, the wherein fan motor are that a three-phase is straight
Motor or a single-phase DC motor are flowed, and the change-over circuit should be a three-phase circuit framework or a single-phase circuit framework relatively.
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| CN201310731819.0A CN104753404B (en) | 2013-12-26 | 2013-12-26 | Fan motor brake gear and its control method |
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| CN201310731819.0A CN104753404B (en) | 2013-12-26 | 2013-12-26 | Fan motor brake gear and its control method |
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|---|---|---|---|---|
| CN105805039A (en) * | 2016-04-13 | 2016-07-27 | 江苏新安电器有限公司 | Brake device of variable frequency fan and control method of brake device |
| CN107659219B (en) * | 2016-07-26 | 2020-02-14 | 台达电子工业股份有限公司 | Fan motor brake device and control method thereof |
| CN110868117B (en) * | 2018-08-27 | 2021-06-25 | 硕呈科技股份有限公司 | Fixed rotation direction starting method of single-phase sensorless direct current brushless motor |
| CN111740656A (en) * | 2020-06-17 | 2020-10-02 | 深圳和而泰智能控制股份有限公司 | Motor control method and related device |
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