CN203326568U - Direct-current brushless motor with reverse power connection preventing protection circuit - Google Patents
Direct-current brushless motor with reverse power connection preventing protection circuit Download PDFInfo
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- CN203326568U CN203326568U CN2013202991298U CN201320299129U CN203326568U CN 203326568 U CN203326568 U CN 203326568U CN 2013202991298 U CN2013202991298 U CN 2013202991298U CN 201320299129 U CN201320299129 U CN 201320299129U CN 203326568 U CN203326568 U CN 203326568U
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- brushless motor
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Abstract
A direct-current brushless motor with a reverse power connection preventing protection circuit comprises a direct-current brushless motor body and a control circuit and further comprises a reverse power connection preventing protection circuit. The reverse power connection preventing protection circuit comprises an MOS tube Q7 and a charge pump circuit, wherein the source and the drain of the MOS tube Q7 are connected in series to a main input circuit of the direct-current brushless motor, the source of the MOS tube Q7 is connected with the positive pole of a power supply, the drain of the MOS tube Q7 is connected with a main circuit of the control circuit, and the charge pump circuit is connected with the gate of the MOS tube Q7. The charge pump circuit and the MOS tube are combined to form the reverse power connection preventing protection circuit, which enables the direct-current brushless motor to have a reverse power connection preventing protection function.
Description
Technical field
The utility model relates to a kind of motor, particularly a kind of DC Brushless Motor with anti-power supply reverse-connection protection circuit.
Background technology
DC Brushless Motor generally consists of the commutation of DC Brushless Motor body (armature winding stator, permanent magnet rotor) combination electronics, drive circuit (being commonly called as control circuit).Its basic structure as shown in Figure 1.The speed governing operation of DC Brushless Motor is controlled by the pwm signal that is carried in MOS power tube (Q1, Q2, Q3, Q4, Q5, Q6) and forms drive circuit.In the DC Brushless Motor use procedure, if run into, operating personnel neglect or power supply positive and negative electrode sign is unclear, and mistake connects control circuit positive and negative electrode and power supply positive and negative electrode instead, can cause the control circuit permanent damages, and motor can't move.At present, DC Brushless Motor generally all its for power input power supply "+" symbol mean that anode and "-" symbol mean negative terminal, or with colour code difference anode and negative terminal.But can not guarantee that operating personnel do not have misoperation and the positive and negative end of power supply to be designated " zero error ".Once occur that above-mentioned phenomenon will damage product, to DC Brushless Motor, the user makes troubles, and also increases cost of use.
Metal-oxide-semiconductor is the voltage-type controlled member, and as shown in Figure 2, its source electrode (S end) is connected to a backward diode with drain electrode (D end) span to structure.Utilize metal-oxide-semiconductor inside to deposit the advantage of backward diode; the source of a power MOS pipe (Q7), drain electrode are concatenated into to DC Brushless Motor input major loop; input using the source electrode of metal-oxide-semiconductor as major loop; drain electrode is connected with the driving element main circuit, just forms the simplest electric current unidirectional protection circuit as shown in Figure 3.This circuit utilizes the diode unilateral conduction principle, and the power supply electric current flows into by the source electrode (internal body diodes anode) of metal-oxide-semiconductor, through drain electrode (internal body diodes negative terminal), flows out, to DC Brushless Motor input main circuit power supply.
Not only the motor running current to be considered when the motor actual motion, but also the motor back electromotive force in when operation will be considered.Particularly motor is when high-speed cruising, and the objective reality of the back electromotive force of motor exerts an influence and more can not be ignored the work of circuit.Therefore, reverse-connection preventing circuit not only will be considered the electric current one-way conduction, also should consider the amphicheirality of current path when normal operation, makes feedback current have the bar path to flow to power supply.Therefore, must make the reversal connection circuit can block electric current when the positive and negative end connection error of power supply and pass through, at the positive and negative end of power supply, connect when correct and there is electric current two-way admittance function.
The utility model content
The purpose of this utility model, just be to address the above problem, and a kind of DC Brushless Motor with anti-power supply reverse-connection protection circuit is provided.
The purpose of this utility model is achieved in that a kind of DC Brushless Motor with anti-power supply reverse-connection protection circuit; comprise DC Brushless Motor body and control circuit; also comprise anti-power supply reverse-connection protection circuit; should comprise a metal-oxide-semiconductor Q7 and a charge pump circuit by anti-power supply reverse-connection protection circuit; the source electrode of metal-oxide-semiconductor Q7 and drain electrode are connected on the input major loop of DC Brushless Motor; wherein the source electrode of metal-oxide-semiconductor Q7 connects positive source; the drain electrode of metal-oxide-semiconductor Q7 connects the main circuit of control circuit, and charge pump circuit is connected with the gate pole of metal-oxide-semiconductor Q7.
Described charge pump circuit comprises capacitor C, diode D and voltage-stabilizing device Z, wherein the input of capacitor C connects the charging pulse input, the input of diode D connects positive source, the input of voltage-stabilizing device Z connects the input of metal-oxide-semiconductor Q7, and the output of capacitor C, diode D and voltage-stabilizing device Z is joined and is connected with the gate pole of metal-oxide-semiconductor Q7.
The specification of capacitor C, diode D and the voltage-stabilizing device Z of the power of described metal-oxide-semiconductor Q7 and formation charge pump circuit is selected and coupling according to the size of DC Brushless Motor running current.
The utility model is compared with the DC Brushless Motor that does not possess reverse connection prevention protection circuit: have the advantages such as safe and reliable, inexpensive, that the components and parts occupied area is little, circuit structure simple, be user-friendly to.The power MOS pipe long-term work, in saturation conduction or degree of depth cut-off state, need not be considered switching characteristic, can select more cheap device.And power MOS pipe and resistance are ripe electronic devices and components, in power electronic circuits, to use in a large number, market purchasing is convenient, low price.In addition, power MOS pipe is voltage-controlled type, controls electric current little, only needs the electronic component of little electric current, cheap.
The accompanying drawing explanation
The structural representation that Fig. 1 is the prior art DC Brushless Motor;
The structural principle schematic diagram that Fig. 2 is metal-oxide-semiconductor;
The basic structure schematic diagram of the DC Brushless Motor that Fig. 3 is belt current unidirectional protection circuit;
The structural representation of the DC Brushless Motor that Fig. 4 is the anti-power supply reverse-connection protection circuit of the utility model band.
Embodiment
Cooperation is referring to Fig. 4, the DC Brushless Motor of the anti-power supply reverse-connection protection circuit of band of the present utility model, comprise DC Brushless Motor body and control circuit, control circuit comprises metal-oxide-semiconductor Q1, Q2, Q3, Q4, Q5, Q6, also comprise anti-power supply reverse-connection protection circuit (in figure, dotted line encloses part), should comprise a metal-oxide-semiconductor Q7 and a charge pump circuit by anti-power supply reverse-connection protection circuit, the source electrode of metal-oxide-semiconductor Q7 and drain electrode are connected on the input major loop of DC Brushless Motor, wherein the source electrode of metal-oxide-semiconductor Q7 connects positive source, the drain electrode of metal-oxide-semiconductor Q7 connects the main circuit of control circuit, charge pump circuit is connected with the gate pole of metal-oxide-semiconductor Q7.
Charge pump circuit comprises capacitor C, diode D and voltage-stabilizing device Z, wherein the input of capacitor C connects the charging pulse input, the input of diode D connects positive source, the input of voltage-stabilizing device Z connects the input of metal-oxide-semiconductor Q7, and the output of capacitor C, diode D and voltage-stabilizing device Z is joined and is connected with the gate pole of metal-oxide-semiconductor Q7.
The specification of capacitor C, diode D and the voltage-stabilizing device Z of the power of the metal-oxide-semiconductor Q7 in the utility model and formation charge pump circuit is selected and coupling according to the size of DC Brushless Motor running current.
The utility model adopts charge pump circuit and metal-oxide-semiconductor combination, forms anti-power supply reverse-connection protection circuit, has realized that DC Brushless Motor possesses the requirement of anti-reverse defencive function.
Claims (3)
1. be with the DC Brushless Motor of preventing the power supply reverse-connection protection circuit for one kind; comprise DC Brushless Motor body and control circuit; it is characterized in that: also comprise anti-power supply reverse-connection protection circuit; should comprise a metal-oxide-semiconductor Q7 and a charge pump circuit by anti-power supply reverse-connection protection circuit; the source electrode of metal-oxide-semiconductor Q7 and drain electrode are connected on the input major loop of DC Brushless Motor; wherein the source electrode of metal-oxide-semiconductor Q7 connects positive source; the drain electrode of metal-oxide-semiconductor Q7 connects the main circuit of control circuit, and charge pump circuit is connected with the gate pole of metal-oxide-semiconductor Q7.
2. band according to claim 1 is prevented the DC Brushless Motor of power supply reverse-connection protection circuit; it is characterized in that: described charge pump circuit comprises capacitor C, diode D and voltage-stabilizing device Z; wherein the input of capacitor C connects the charging pulse input; the input of diode D connects positive source; the input of voltage-stabilizing device Z connects the input of metal-oxide-semiconductor Q7, and the output of capacitor C, diode D and voltage-stabilizing device Z is joined and is connected with the gate pole of metal-oxide-semiconductor Q7.
3. band according to claim 1 is prevented the DC Brushless Motor of power supply reverse-connection protection circuit, it is characterized in that: the specification of capacitor C, diode D and the voltage-stabilizing device Z of the power of described metal-oxide-semiconductor Q7 and formation charge pump circuit is selected and coupling according to the size of DC Brushless Motor running current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202991298U CN203326568U (en) | 2013-05-21 | 2013-05-21 | Direct-current brushless motor with reverse power connection preventing protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202991298U CN203326568U (en) | 2013-05-21 | 2013-05-21 | Direct-current brushless motor with reverse power connection preventing protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203326568U true CN203326568U (en) | 2013-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202991298U Expired - Lifetime CN203326568U (en) | 2013-05-21 | 2013-05-21 | Direct-current brushless motor with reverse power connection preventing protection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN203326568U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811820A (en) * | 2016-05-16 | 2016-07-27 | 沙洲职业工学院 | Vehicle direct current motor speed adjustment circuit with functions of adjusting speed and preventing power supply wrong connection |
| CN106849925A (en) * | 2016-12-25 | 2017-06-13 | 惠州市亿能电子有限公司 | Flash NMOS drive circuits |
-
2013
- 2013-05-21 CN CN2013202991298U patent/CN203326568U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811820A (en) * | 2016-05-16 | 2016-07-27 | 沙洲职业工学院 | Vehicle direct current motor speed adjustment circuit with functions of adjusting speed and preventing power supply wrong connection |
| CN106849925A (en) * | 2016-12-25 | 2017-06-13 | 惠州市亿能电子有限公司 | Flash NMOS drive circuits |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131204 |
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| CX01 | Expiry of patent term |