CN2403177Y - fan motor - Google Patents

Abstract

A fan motor is composed of a single group of coils, which can be triggered to generate forward and reverse current to be conducted alternatively to generate an alternating magnetic field for driving the motor to rotate under the control of an interactive circuit, a control circuit can be added in the interactive circuit to protect the motor and circuit elements from overheat and overload, and a locking circuit and a frequency dividing circuit can be added to make the motor have the functions of locking loop and frequency dividing.

Description

fan motor

The utility model relates to a fan motor, in particular to an ultra-thin, short and small cooling fan motor.

When the existing fan motor is used for a long time, the motor itself will generate a very high temperature, so some circuit components in the motor or itself may be burned due to overheating, thereby causing losses to users. In addition, because the existing fan motor does not have a complete control circuit, the operations of the various devices cannot be uniformly controlled and coordinated. Moreover, the existing motors are generally relatively large in size and extremely inconvenient to use.

In order to solve the above problems, the main purpose of this utility model is to provide a fan motor, which not only minimizes the volume, but also has multiple functions such as preventing motor or circuit components from being burned, locking power off, and frequency division.

In order to achieve the above purpose, the utility model provides a fan motor, which includes a motor stator coil and a control circuit; the motor stator coil is composed of a single set of coils, and the single set of coils contains two contacts controlled by an interactive circuit. The contacts are drawn from the interactive circuit; the control circuit includes an interactive circuit that controls positive and negative conduction of the coil, a locking circuit that stops the motor rotor due to locking and power failure, a comparison circuit that controls the interactive circuit to stop the motor, and a A voltage comparison can be performed to control the capacitance of the locking loop; wherein the interactive circuit includes several transistors and is connected to a coil, the locking loop is connected to the interactive circuit, the output terminal of the comparison circuit is connected to the locking loop, and the capacitor is connected to the compare circuit. The control circuit further includes an overheating device, which is a temperature sensing element and connected to the locking circuit. The control circuit can be made into an IC chip. It also contains a Hall element that controls the control circuit. The control circuit and the Hall element can be integrated into an IC chip. It also includes a frequency division circuit for enabling the control circuit to have a frequency division function, and the frequency division circuit is connected to the interactive circuit.

The motor stator coil composition of the utility model is designed for the driving circuit of the existing single group of coils, and only two contacts need to be drawn out, and the two contacts are controlled by an interactive circuit to form positive and negative positive and negative conduction. In addition, the interactive circuit can cooperate with a locking circuit, an overheating protection circuit or a frequency division circuit, so that the control circuit of the cooling fan motor has the functions of locking power off and frequency division. The control circuit can be designed into an extremely small IC chip by means of semiconductor technology, so that the volume of the fan motor is minimized and it has multiple functions. In addition, the circuit can also be used to protect the application circuit of the motor, such as: adding a protection circuit, locking power-off circuit and frequency division circuit, so that the fan motor has many functions such as preventing the motor or circuit components from burning, locking power-off and frequency division, etc. function.

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the circuit structure diagram of the utility model first embodiment;

Fig. 2 is the circuit diagram of the second embodiment of the utility model;

Fig. 3 is a functional block diagram of the third embodiment of the present invention.

Please refer to shown in Fig. 1, this is the circuit structure diagram of the first embodiment of the utility model, shows that the utility model mainly comprises a control circuit 10, a Hall element 20 and a motor coil 30 in the figure, wherein the control circuit includes An interactive circuit 11 , a locking circuit 12 , an overheating device 13 , a capacitor 14 , a comparison circuit 15 and a logic operation circuit 16 .

The Hall element 20 is connected to the logic operation circuit 16 through an operational amplifier to control the interactive circuit 11, and the interactive circuit 11 includes several transistors to control the positive and negative conduction of the motor coil 30, wherein the motor coil 30 is a single set coil structure. The interactive circuit 11 is also connected to the locking loop 12, and the locking loop 12 is connected to the comparison circuit 15, wherein the comparison circuit 15 is connected to the capacitor 14 and the comparison circuit 15 includes two operational amplifiers 151, 152 and several diodes 153 , wherein the negative terminal of the operational amplifier 152 is connected to four diodes 153 as a comparison voltage for the charging voltage of the capacitor 14 . When the output of the Hall element 20 is a high potential, the capacitor 14 is charged, and if the charging voltage of the capacitor 14 is greater than the total voltage of the four diodes, the operational amplifier 152 outputs a control signal to the locking circuit 12 after voltage comparison, Make the locking circuit 12 act and then control the interactive circuit 11 to stop the motor rotor to form power-off protection.

In addition, the overheating device 13 is a temperature sensing element, which is connected to the locking circuit 12. When the temperature of the IC chip exceeds the load, the overheating device 13 outputs a signal to the locking circuit 12 to control the interactive circuit 11 to stop the motor rotor. The operation prevents the IC chip or circuit components from being burned, so that the circuit has the function of overheating protection.

Please refer to shown in Fig. 2, this is the circuit diagram of the second embodiment of the present utility model, and wherein this interactive circuit 40 is identical with the interactive circuit of existing motor control single coil, but it comprises a frequency dividing circuit 41, a Hall in addition The element 42 and a motor coil 43 , wherein the motor coil 43 is a conventional single coil structure, and the Hall element 42 is used to control the interactive circuit 40 . In addition, the frequency division circuit 41 can be integrated into a frequency division IC, and the frequency division circuit 41 can use non-four-pole multi-pole numbers (such as: six-pole, eight-pole, ten-pole, twelve-pole, etc.) brushless The Hall IC of the DC motor fan, or the output signal of the interactive circuit 40 is frequency-divided and converted into a square wave output, and different frequency division multiples are selected by setting the frequency division multiple selection pins S0 and S1. Can be designed according to different needs. In addition, the frequency dividing circuit 41, the interactive circuit 40 and the Hall element 42 can also be designed in conjunction with other application circuits to be integrated into a multifunctional IC chip, as shown in Figure 3, so that the cooling fan motor is not only ultra-thin and short, but also more compact. It has multiple functions such as frequency division, power lock and overheat protection, and can also be used with other motor application circuits to make the cooling fan motor more powerful.

Please refer to shown in Fig. 3, this is the best embodiment of the present utility model, and it comprises an integrated frequency division, the IC chip 50 of functions such as locking power-off, a Hall element 60 and motor coil 70, wherein the motor coil 70 is a single coil structure in the present invention, wherein the IC chip 50 includes a drive device 51 , a speed sensor 52 , a lock detection device 53 , and a logic operation module 54 . Wherein the driving device 51 controls the positive and negative conduction of the motor coil 70, the lock detection device 53 is composed of a lock power-off circuit to provide the motor of the utility model with the function of lock power-off, and the speed sensor 52 is composed of a The frequency circuit is formed so that the motor of the utility model has a frequency division function. In addition, the logic operation module 54 receives signals from the speed sensor 52 and the lock detection device 53 to perform logic operations and then controls the drive device 51 to make the motor coil operate in different ways due to different control signals.

To sum up, the control circuit of the present invention can cooperate with the application circuit for protecting the motor, and integrate it into a single IC chip, which not only makes the volume of the single coil structure smaller, but also can cooperate with the design of the IC chip, so that Motors have more functions for industrial applications.

The above descriptions are only some preferred embodiments of the present utility model, and are not intended to limit the present utility model.

Claims (6)

1, a kind of fan motor is characterized in that: it comprises motor stator coil and control circuit; This motor stator coil is made up of single group coil, and this single group coil contains two contacts that are subjected to mutual circuit control, and this two contact is drawn from mutual circuit; The mutual circuit, one that this control circuit comprises a control coil forward and reverse conduction makes motor rotor can carry out voltage ratio with the electric capacity of control locked loop because of the locked loop that pins outage and shut down, comparison circuit and that the mutual circuit of a control shuts down motor; Wherein, this mutual circuit comprises several transistors and is connected to coil, and this locked loop is connected to this mutual circuit, and the output of this comparison circuit is connected to this locked loop, and this electric capacity is connected to this comparison circuit.

2, fan motor according to claim 1 is characterized in that: described control circuit comprises a superheater in addition, and this superheater is a temperature sensitive member and is connected to locked loop.

3, according to claim 1 or 2 described fan motors, it is characterized in that: described control circuit can be made into an IC wafer.

4, fan motor according to claim 1 is characterized in that: it also comprises the Hall unit of this control circuit of control.

5, according to claim 1 or 4 described fan motors, it is characterized in that: described control circuit and this Hall unit can be integrated and make an IC wafer.

6, according to the described fan motor of claim 1 Xu, it is characterized in that: it also comprises a frequency dividing circuit that makes control circuit tool division function, and this frequency dividing circuit is connected to mutual circuit.