CN209690754U - A kind of sander control circuit - Google Patents

Abstract

The utility model discloses a kind of sander control circuits, including main control chip, battery management circuit, circuit for controlling motor and battery power supply interface, it is parallel with the 5th capacitor and the 6th capacitor respectively between the power connection foot and ground pin of the main control chip, tie point between 6th capacitor and the 5th capacitor is in series with the 5th resistance and ground terminal respectively, and the first input port of the main control chip is connected with battery management circuit.Sander control circuit disclosed by the utility model effectively realizes electrodeless variable-speed, while real-time monitoring current of electric to the motor of driving bistrique, realizes the overcurrent protection to motor.

Description

A kind of sander control circuit

Technical field

The utility model relates to control circuit, in particular to a kind of sander control circuit.

Background technique

The device of electric grinding foot skin is a kind of for removing the tool of dead skin or callus on foot.The existing field It is furnished with bistrique on sander, bistrique is driven by motor.Sander on existing market is battery powered, but existing supplies electricity to drive The circuit of dynamic motor is not effectively protected or is controlled to motor, and the motor of sander in the market is easily damaged, and is used Person needs replacing motor or whole device is thrown aside.

Utility model content

The technical problem to be solved by the present invention is to provide a kind of sander control circuits, effectively the electricity to driving bistrique Machine realizes electrodeless variable-speed, while real-time monitoring current of electric, realizes the overcurrent protection to motor.

In order to solve the above-mentioned technical problem, the technical solution of the utility model are as follows:

A kind of sander control circuit, including main control chip, battery management circuit, circuit for controlling motor and battery power supply connect Mouthful, the 5th capacitor and the 6th capacitor are parallel between the power connection foot and ground pin of the main control chip respectively, it is described Tie point between 6th capacitor and the 5th capacitor is in series with the 5th resistance and ground terminal respectively, and the first of the main control chip is defeated Entrance is connected with battery management circuit,

The battery management circuit includes first resistor, first capacitor and power management chip, the power management chip Battery temperature detection input pin TMP and power management chip ground pin between be shorted and connect with ground terminal, it is described First resistor, the input of the power management chip are connected between the charging current test side of power management chip and ground terminal Be connected with first capacitor between voltage positive input pin and the ground pin of power management chip, the power management chip it is defeated Enter voltage positive input pin and be connected with USB input circuit, the chip of the power management chip begins can input terminal CE connection USB Input circuit, the charged state instruction pin of the power management chip and the first signal output pin of main control chip connect, The battery connection pin of the power management chip is connect with the anode of battery power supply interface,

The circuit for controlling motor includes the first metal-oxide-semiconductor, the 7th resistance, the 16th resistance, the 8th capacitor and driving motor, Grid, source electrode and the drain electrode of first metal-oxide-semiconductor are connect with the cathode of the 7th resistance, the 16th resistance and driving motor respectively, The both ends of 16th resistance are parallel with the 8th capacitor, the source electrode of the 16th resistance, the 8th resistance and the first metal-oxide-semiconductor The connection of the second signal output pin of tie point and main control chip, one end of the 7th resistance and the fourth signal of main control chip Output pin connection.

Further, the main control chip is also connected with battery power display circuit, the battery power display circuit packet Several paths of LEDs instruction diodes are included, the anode of the LED indication diode is in series with one end connection of corresponding current-limiting resistance, The other end of the current-limiting resistance is connect with the anode of battery power supply interface, the cathode of several LED indication diodes and master Multiple instruction pin connections for controlling the LED indication diode of LED indication diode of control chip.

Further, the switched pins of the main control chip are connect with key circuit, and the key circuit is pressed including first Key and with concatenated 17th resistance of the first key, the other end of first key connect with ground terminal, the 17th electricity The other end of resistance and the switched pins of main control chip connect.

Further, the main control chip is also connected with USB power supply interface.

Further, the model CMS89F112 of the main control chip.

By adopting the above technical scheme, main control chip connection circuit for controlling motor and battery management circuit, circuit for controlling motor The driving motor of connection, the 7th resistance of the grid connection of the first metal-oxide-semiconductor, main control chip issue control signal and pass through the 7th resistance Current limliting drives the first metal-oxide-semiconductor, realizes the electrodeless control of driving motor, and the 16th resistance connecting with the source electrode of the first metal-oxide-semiconductor is real When detect current of electric, realize that the overcurrent protection to driving motor is shut down, in addition, the battery management circuit of main control chip connection is real Now to the management of battery charging.

Detailed description of the invention

Fig. 1 is the circuit diagram of the utility model；

Fig. 2 is the circuit diagram that the battery capacity of the utility model is shown.

Specific embodiment

Specific embodiment of the present utility model is described further with reference to the accompanying drawing.It should be noted that The explanation of these embodiments is used to help to understand the utility model, but does not constitute the restriction to the utility model.This Outside, technical characteristic involved in the various embodiments of the present invention described below is as long as they do not conflict with each other It can be combined with each other.

As shown in Figs. 1-2, the utility model discloses a kind of sander control circuits, including main control chip U1, cell tube Circuit 2, circuit for controlling motor 3 and battery power supply interface are managed, is divided between the power connection foot and ground pin of main control chip U1 It is not parallel with the 5th capacitor C5 and the 6th capacitor C6, the tie point between the 6th capacitor C6 and the 5th capacitor C5 is in series with respectively The first input port of five resistance R5 and ground terminal GND, main control chip U1 are connected with battery management circuit 2, and battery management circuit 2 wraps First resistor R1, first capacitor C1 and power management chip U2 are included, the battery temperature of power management chip U2 detects input pin It is shorted between the ground pin of TMP and power management chip U2 and is connect with ground terminal GND, the charging electricity of power management chip U2 First resistor R1, the input voltage positive input pin of power management chip U2 are connected between stream test side PRO and ground terminal GND First capacitor C1 is connected between the ground pin of Vcc and power management chip U2, the input voltage of power management chip U2 is just Input pin Vcc and be connected with USB input circuit, the chip of power management chip U2 begin can input terminal CE connection USB input it is electric The charged state instruction pin CHRG on road, power management chip U2 is connect with the first signal output pin of main control chip U1, electricity The battery connection pin BAT of source control chip U2 is connect with the anode of battery power supply interface, and main control chip connects motor control electricity Road 3 and battery management circuit 2, the driving motor that circuit for controlling motor 3 connects, the 7th electricity of the grid connection of the first metal-oxide-semiconductor Q1 R7 is hindered, main control chip U1 issues control signal and drives the first metal-oxide-semiconductor Q1 by the 7th resistance R7 current limliting, realizes the nothing of driving motor Pole control, the 16th resistance R16 real-time detection current of electric connecting with the source electrode of the first metal-oxide-semiconductor are realized to driving motor Overcurrent protection is shut down, in addition, the battery management circuit 2 of main control chip connection realizes the management charged to battery.Main control chip U1 Model CMS89F112, the chip high-precision adc analog-to-digital conversion, high reliablity.

Circuit for controlling motor 3 includes the first metal-oxide-semiconductor Q1, the 7th resistance R7, the 16th resistance R16, the 8th capacitor C8 and drive Dynamic motor, grid, source electrode and the drain electrode of the first metal-oxide-semiconductor Q1 respectively with the 7th resistance R7, the 16th resistance R16 and driving motor Cathode connection, the both ends of the 16th resistance R16 are parallel with the 8th capacitor C8, the 16th resistance R16, the 8th resistance and the first MOS The tie point of the source electrode of pipe Q1 is connect with the second signal output pin of main control chip U1, one end of the 7th resistance R7 and master control core The fourth signal output pin of piece U1 connects.

In addition, main control chip U1 is also connected with battery power display circuit 4, if battery power display circuit 4 includes main line LED indication diode, the anode of LED indication diode be in series with corresponding current-limiting resistance one end connection, current-limiting resistance it is another One end is connect with the anode of battery power supply interface, and the cathode of several LED indication diodes is used to control with the multiple of main control chip U1 The instruction pin of the LED indication diode of LED indication diode processed connects, as shown, the several control LED of main control chip U1 refer to The pin connection several LED indication diodes of LED1 to LED5 for showing diode, wherein 2 one Lu Lian of the second LED indication diode (LED) USB input circuit is connect, the indicator light on remaining four tunnel lights the indicator light of corresponding number according to the number of the battery capacity of circuit, directly It sees and reminds user that can charge for battery, prevent the complete device of battery drain from cannot use.

The switched pins sw of main control chip U1 connect 5 with key circuit, and key circuit includes the first key S1 and with first The concatenated 17th resistance R17 of key S1, the other end of the first key S1 are connect with ground terminal GND, and the 17th resistance R17's is another One end is connect with the switched pins sw of main control chip U1, the interior pull-up resistor and the 17th resistance of main control chip U1 come detect by Key, user are started or stoped by key control device.Main control chip U1 is also connected with USB power supply interface, is that battery is real Now facilitate charging.

The embodiments of the present invention is explained in detail in conjunction with attached drawing above, but the utility model is not limited to be retouched The embodiment stated.For a person skilled in the art, right in the case where not departing from the utility model principle and spirit These embodiments carry out a variety of change, modification, replacement and modification, still fall in the protection scope of the utility model.

Claims (5)

1. a kind of sander control circuit, it is characterised in that: including main control chip, battery management circuit, circuit for controlling motor and Battery power supply interface is parallel with the 5th capacitor and the 6th between the power connection foot and ground pin of the main control chip respectively Capacitor, the tie point between the 6th capacitor and the 5th capacitor are in series with the 5th resistance and ground terminal, the master control core respectively First input port of piece is connected with battery management circuit,

The battery management circuit includes first resistor, first capacitor and power management chip, the electricity of the power management chip It is shorted and is connect with ground terminal, the power supply between pond temperature detection input pin TMP and the ground pin of power management chip First resistor, the input voltage of the power management chip are connected between the charging current test side of managing chip and ground terminal First capacitor, the input electricity of the power management chip are connected between positive input pin and the ground pin of power management chip Positive pressure input pin and be connected with USB input circuit, the chip of the power management chip begin can input terminal CE connection USB input Circuit, the charged state instruction pin of the power management chip and the first signal output pin of main control chip connect, described The battery connection pin of power management chip is connect with the anode of battery power supply interface,

The circuit for controlling motor includes the first metal-oxide-semiconductor, the 7th resistance, the 16th resistance, the 8th capacitor and driving motor, described Grid, source electrode and the drain electrode of first metal-oxide-semiconductor are connect with the cathode of the 7th resistance, the 16th resistance and driving motor respectively, described The both ends of 16th resistance are parallel with the 8th capacitor, the connection of the source electrode of the 16th resistance, the 8th resistance and the first metal-oxide-semiconductor Point is connect with the second signal output pin of main control chip, and one end of the 7th resistance and the fourth signal of main control chip export Pin connection.

2. sander control circuit according to claim 1, it is characterised in that: the main control chip is also connected with battery electricity Display circuit is measured, the battery power display circuit includes several paths of LEDs instruction diodes, the sun of the LED indication diode Pole is in series with one end connection of corresponding current-limiting resistance, and the other end of the current-limiting resistance and the anode of battery power supply interface connect It connects, the cathode of several LED indication diodes and multiple LED indications for being used to control LED indication diode of main control chip The instruction pin of diode connects.

3. sander control circuit according to claim 1, it is characterised in that: the switched pins of the main control chip with press Key circuit connection, the key circuit include the first key and with concatenated 17th resistance of the first key, first key The other end connect with ground terminal, the switched pins of the other end of the 17th resistance and main control chip connect.

4. sander control circuit according to claim 1, it is characterised in that: the main control chip is also connected with USB confession Electrical interface.

5. sander control circuit according to claim 1, it is characterised in that: the model of the main control chip CMS89F112。