Drive control circuit of brushless motor, drive control circuit board, brushless motor and inflatable product

Abstract

The utility model provides a drive control circuit of a brushless motor. The drive control circuit comprises an input circuit and an output circuit. The input circuit comprises a rectifier bridge, the alternating current input end of the rectifier bridge is connected to the mains supply through a fuse and a filtering unit, and the direct current output end of the rectifier bridge generates power supply voltage VBUS; the input circuit further comprises an auxiliary power supply U3, the D end of the auxiliary power supply U3 is connected to a power supply voltage VBUS, and the S end of the auxiliary power supply U3 generates a 15V power supply voltage to supply power to the output circuit. The output circuit is provided with control chips U1, U2 and U3 corresponding to three-phase windings of the brushless motor; the VCC end of the control chip is connected to the 15V power supply voltage, the HO end is used for outputting a first control signal to the corresponding switch tube to enable the switch tube to be switched on so that the brushless motor works at a first rotating speed, and the LO end is used for outputting the first control signal to the corresponding switch tube to enable the switch tube to be switched on so that the brushless motor works at a second rotating speed; the specification of the auxiliary power supply is 15V and 100mA. The utility model also provides a drive control circuit board of the brushless motor, the brushless motor and an inflatable product.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of inflatable products, in particular to brushless motor. BACKGROUND

[0002] The motor is an indispensable component of the inflatable pump and its mattress, and the quality of the motor directly relates to the quality of the inflatable pump and its mattress, and affects the mood of the consumer's use experience;

[0003] Secondly, the traditional inflatable pump and its mattress products at home and abroad basically use brush motor, and because of the maturity and application of the existing brushless motor technology, some products also gradually use brushless motor, and the brushless motor must be matched with the corresponding drive control board for actual work, and these drive control boards can only ensure the long-term work of the products under the condition of sufficient external ventilation and heat dissipation or strong wind heat dissipation. UTILITY MODEL CONTENTS

[0004] The utility model provides a brushless motor's drive control circuit that mainly solves the technical problems of small heat dissipation and natural heat dissipation.

[0005] In order to solve the above technical problems, the utility model provides a brushless motor's drive control circuit, which comprises: input circuit, output circuit;

[0006] The input circuit comprises a rectifier bridge, the AC input end of the rectifier bridge is connected to the mains through a fuse and a filter unit, and the DC output end of the rectifier bridge generates a power voltage VBUS;

[0007] The input circuit further comprises an auxiliary power supply U3, the D end of which is connected to the power voltage VBUS, and the S end generates a 15V power voltage to power the output circuit;

[0008] The output circuit is provided with control chips U1, U2 and U3 corresponding to the three-phase winding of the brushless motor;The VCC end of the control chip is connected to the 15V power voltage respectively, the HO end is used for outputting the first control signal to the corresponding switch tube to make it conductive, so that the brushless motor works at the first rotating speed, and the LO end is used for outputting the first control signal to the corresponding switch tube to make it conductive, so that the brushless motor works at the second rotating speed;

[0009] The specification of the auxiliary power supply is 15V, 100mA.

[0010] In a preferred embodiment: the control chips U1, U2 and U3 output the first control signal in sequence, so that the switch tubes Q1, Q2 and Q3 corresponding to the control chips U1, U2 and U3 are turned on in sequence;

[0011] The control chip U1, U2, U3 outputs second control signals in sequence, so that the switch tubes Q4, Q5, Q6 corresponding to the control chip U1, U2, U3 are turned on in sequence.

[0012] In a preferred embodiment: the switch tubes Q1, Q2, Q3 are connected between the power supply voltage VBUS and U, V and W in the three-phase winding respectively.

[0013] The utility model also provides a drive control circuit board of brushless motor, be provided with corresponding control circuit on the control circuit board as described above.

[0014] The utility model also provides a brushless motor, including motor body and drive control circuit board as described above.

[0015] The utility model also provides an inflatable product, has used brushless motor as described above.

[0016] In a preferred embodiment: the inflatable product is an air pump or an air mattress.

[0017] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0018] The utility model provides a drive control circuit of brushless motor, because the specification of auxiliary power supply on drive control board is 15A, and the specification of switch tube and rectifier bridge is far below 15A, so auxiliary power supply does not need full power work, and the heat quantity is relatively low, so long-term operation work can be realized without the condition of sufficient specific external ventilation and heat dissipation or strong wind heat dissipation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the circuit diagram of input circuit in the preferred embodiment of the utility model;

[0020] Figure 2 It is the circuit diagram of output circuit in the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings; obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments, based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the range of protection of the utility model.

[0022] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "set with", "sleeve / interface", "connection" and so on, should do the broad sense understanding, for example "connection", can be wall-mounted connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two elements inside the communication, for the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0023] Reference Figure 1 And Figure 2 The embodiment provides a kind of brushless motor drive control circuit, comprising: input circuit, output circuit;

[0024] The input circuit includes rectifier bridge, the alternating current input end of the rectifier bridge is connected to commercial power through fuse, filter unit, and the direct current output end of the rectifier bridge generates power voltage VBUS;

[0025] The input circuit further includes auxiliary power supply U3, its D end is connected to power voltage VBUS, and the S end generates 15V power voltage to power output circuit;

[0026] The output circuit is provided with control chip U1, U2, U3 corresponding to the three-phase winding of brushless motor;The VCC end of control chip is connected to the 15V power voltage respectively, and the HO end is used to output first control signal to corresponding switch tube to make it conductive to make brushless motor work at first speed, and the LO end is used to output first control signal to corresponding switch tube to make it conductive to make brushless motor work at second speed;The specification of the auxiliary power supply is 15V, 100mA.

[0027] The brushless motor drive control circuit described above, because the specification of auxiliary power supply on drive control board is 15A, and the specification of switch tube and rectifier bridge is far lower than 15A, so auxiliary power supply does not need full power work, and the amount of heat is relatively low, so it can also realize long-term operation without specific external ventilation and sufficient cooling conditions or strong wind cooling conditions.

[0028] In the embodiment, the control chip U1, U2, U3 sequentially outputs first control signal, so that the switch tube Q1, Q2, Q3 corresponding to the control chip U1, U2, U3 is sequentially conductive;The control chip U1, U2, U3 sequentially outputs second control signal, so that the switch tube Q4, Q5, Q6 corresponding to the control chip U1, U2, U3 is sequentially conductive. In this way, brushless motor can work at different speeds.

[0029] Specifically, the switch tube Q1, Q2, Q3 is connected to power voltage VBUS and U, V and W in three-phase winding respectively.

[0030] The embodiment also provides a drive control circuit board of the brushless motor, wherein the control circuit board is provided with the control circuit as described above.

[0031] The embodiment also provides a brushless motor, comprising a motor body and the drive control circuit board as described above.

[0032] The brushless motor as described above can be applied to various inflating products, such as an inflating pump or an inflating mattress.

[0033] The above merely describes a preferred specific implementation of the present application, and is not intended to limit the patent range of the present application, and any equivalent transformation of the technical content described in the present application specification shall fall within the protection range of the present application.

Claims

1. A drive control circuit for a brushless motor, characterized in that include: Input circuit, output circuit; The input circuit includes a rectifier bridge, an AC input end of the rectifier bridge is connected to the mains through a fuse and a filter unit, and a DC output end of the rectifier bridge generates a power supply voltage VBUS; The input circuit also includes an auxiliary power supply U3, whose D terminal is connected to the power supply voltage VBUS, and whose S terminal generates a 15V power supply voltage to power the output circuit; The output circuit is provided with control chips U1, U2, and U3 corresponding to the three-phase windings of the brushless motor; the VCC terminals of the control chips are respectively connected to the 15V power supply voltage, the HO terminals are used to output a first control signal to the corresponding switch tubes to turn them on so that the brushless motor operates at a first speed, and the LO terminals are used to output a first control signal to the corresponding switch tubes to turn them on so that the brushless motor operates at a second speed; The specifications of the auxiliary power supply are 15V, 100mA.

2. The drive control circuit of a brushless motor according to claim 1, characterized in that: The control chips U1, U2, and U3 sequentially output first control signals, so that the switch tubes Q1, Q2, and Q3 corresponding to the control chips U1, U2, and U3 are sequentially turned on; The control chips U1, U2, and U3 sequentially output second control signals, so that the switch tubes Q4, Q5, and Q6 corresponding to the control chips U1, U2, and U3 are turned on sequentially.

3. The drive control circuit of a brushless motor according to claim 2, characterized in that: The switch tubes Q1, Q2 and Q3 are connected to the power supply voltage VBUS and U, V and W in the three-phase winding respectively.

4. A drive control circuit board for a brushless motor, characterized in that: The control circuit board is provided with a control circuit corresponding to any one of claims 1-3.

5. A brushless motor comprising a motor body and the drive control circuit board according to claim 4.

6. An inflatable product characterized by The brushless motor according to claim 5 is used.

7. The inflatable product according to claim 6, characterized in that: The inflatable product is an air pump or an inflatable mattress.

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