CN213030536U

CN213030536U - Multifunctional cook machine adopting direct-current brushless motor and control circuit thereof

Info

Publication number: CN213030536U
Application number: CN202020796934.1U
Authority: CN
Inventors: 姜德志; 陈艳丽; 任张平; 李燕霞
Original assignee: Qingdao Huihe Information Technology Co ltd
Current assignee: Qingdao Huihe Information Technology Co ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2021-04-23
Anticipated expiration: 2030-05-14

Abstract

The utility model relates to a multifunctional cook machine adopting a direct current brushless motor and a control circuit thereof, which comprises a power supply circuit, the direct current brushless motor, an inversion driving circuit, a single chip IC1, wherein the direct current brushless motor is connected with the inversion driving circuit, the inversion driving circuit is connected with a single chip IC1, the multifunctional cook machine also comprises an EMC circuit, an overcharge protection circuit and a rectification circuit, a commercial power input end is connected with the EMC circuit, the EMC circuit provides working voltage for the whole control panel through the overcharge protection circuit and the rectification circuit, the EMC circuit is electrically connected with the rectification circuit through the overcharge protection circuit, the rectification circuit is electrically connected with the inversion driving circuit, the single chip IC1 is also connected with a display circuit, a communication circuit, a touch key circuit, a rotary encoder circuit, a temperature sensing circuit and a heating control circuit, the single chip sends display data to the display circuit through SPI, the single chip is electrically connected with the temperature sensing, the touch key circuit and the rotary encoder circuit are electrically connected with an IO port of the single chip microcomputer.

Description

Multifunctional cook machine adopting direct-current brushless motor and control circuit thereof

Technical Field

The utility model belongs to the circuit field especially relates to an adopt brushless DC motor's multi-functional cook machine and control circuit thereof.

Background

The existing cook machine takes a series excited motor or a direct current brush motor as power, the series excited motor has high noise and low energy efficiency, adopts a carbon brush for reversing, has high failure rate, adopts the carbon brush for reversing although the direct current brush motor has low noise and high energy efficiency, has high failure rate and large volume, and is not beneficial to structural design.

Disclosure of Invention

The utility model provides a multifunctional cook control circuit adopting a DC brushless motor to solve the technical problems existing in the prior art.

The utility model discloses a solve the technical scheme that technical problem that the well-known technique exists was taken: the intelligent control system comprises a power circuit, a direct current brushless motor, an inversion driving circuit, a single chip microcomputer IC1, wherein the direct current brushless motor is connected with the inversion driving circuit, the power circuit is connected with the inversion driving circuit, the inversion driving circuit is connected with a single chip microcomputer IC1, the intelligent control system further comprises an EMC circuit, an overcharge protection circuit and a rectification circuit, a mains supply input end is connected with the EMC circuit, the EMC circuit provides working voltage for the whole control panel through the overcharge protection circuit and the rectification circuit, the EMC circuit is electrically connected with the rectification circuit through the overcharge protection circuit, the rectification circuit is electrically connected with the inversion driving circuit, the single chip microcomputer IC1 is further connected with a display circuit, a communication circuit, a touch key circuit, a rotary encoder circuit, a temperature sensing circuit and a heating control circuit, the single chip microcomputer sends display data to the display circuit through SPI, and the single, the touch key circuit and the rotary encoder circuit are electrically connected with an IO port of the single chip microcomputer.

Further, the EMC circuit 1 is composed of four safety capacitors C1, C2, C3, C4, a common mode inductor L1 and a discharge resistor R2, a live wire of a mains supply is sequentially connected with one end of the safety capacitor C2, the common mode inductor L1, the safety capacitor C3 and one end of the discharge resistor R2, the other ends of the safety capacitor C2, the common mode inductor L1, the safety capacitor C3 and the discharge resistor R2 are connected with a zero line of the mains supply, one end of the safety capacitor C1 is connected with the live wire of the mains supply, the other end of the safety capacitor C1 is connected with a control board, one end of the safety capacitor C4 is connected with the zero line of the mains supply, and the other end of the safety.

Further, the overcharge protection circuit 2 comprises a current-limiting resistor R1 and a relay K1, the current-limiting resistor R1 and the relay K1 are connected in parallel, an input end of the overshoot protection circuit is connected with the EMC circuit 1, and an output end of the overshoot protection circuit is connected with the rectification circuit 3.

Further, the rectifying circuit 3 comprises a rectifying bridge B1 and a high-voltage electrolytic capacitor E1, the alternating current end of the rectifying bridge B1 is connected with the overcharge protection circuit 2, the anode of the direct current end of the rectifying bridge B1 is connected with the inverter driving circuit 6 through the high-voltage electrolytic capacitor E1, and the cathode of the rectifying bridge and the cathode of the high-voltage electrolytic capacitor E1 are grounded.

Further, the communication circuit 8 includes a signal output circuit 81 and a signal input circuit 82, the signal output circuit 81 includes a transistor N1, a pull-up resistor R4 and a capacitor C7, the signal input circuit 82 includes two capacitors C5, C6, a transistor P1, two pull-down resistors R5, R6, the signal output terminal of the monolithic IC1 is connected to the base of the signal output circuit transistor N1, the emitter of the transistor N1 is connected to the supply voltage VCC through the pull-up resistor R4, the collector of the transistor N1 is grounded, the signal output terminal is connected to the input terminals of the capacitor C7 and the upper computer control board, the cathode of the capacitor C7 is grounded, the signal output terminal of the monolithic IC1 is connected to the pull-down resistor R5 and the emitter of the transistor P1 through the current-limiting resistor R6, the cathode of the current-limiting resistor R6 is grounded through the capacitor C5, the cathode of the pull-down resistor R5 is grounded, the base of the transistor P1 is connected to the output terminal of the capacitor C6, the cathode of the capacitor C6 is grounded.

Further, the rotary encoder circuit comprises a two-way rotary encoder XN 1.

Further, the temperature sensing circuit comprises an NTC temperature sensor RT 1.

Further, the heating circuit is opened and closed by a relay K2 to control the temperature of the heater CN1 to rise.

The utility model provides an adopt multi-functional cook of DC brushless motor machine, includes drive mechanism, DC brushless motor, drive control panel, display panel, multi-functional basin and heating device, drive mechanism is connected with rabbling mechanism, the below of rabbling mechanism is equipped with multi-functional basin, heating device locates the below of multi-functional basin, DC brushless motor, heating device and display panel are connected with the drive control panel electricity, its characterized in that, the above-mentioned arbitrary item of multi-functional cook of adoption DC brushless motor machine cook machine the control circuit of cook machine.

The utility model has the advantages and positive effect as follows:

the single chip microcomputer IC1 is used as a core control component, the operation of the DC brushless motor is controlled by matching with an inversion driving component and a corresponding protection circuit, and meanwhile, the control panel realizes human-computer interaction through a display circuit and a touch key circuit. This control panel utilizes communication circuit can connect host computers such as display panel, realize better human-computer interface and operating function, in order to improve EMC performance, guarantee that the drive plate accords with the requirement of relevant standard, this control panel power input circuit has contained the EMC circuit, simultaneously in order to avoid going up the electricity and cause the impact to device and electric wire netting on the board in the twinkling of an eye, overcharge protection circuit has still been designed, communication circuit has adopted the triode drive mode, such circuit can adapt to the longer condition of communication line, the opto-coupler isolation drive circuit of adaptation host computer that also can be better.

Drawings

Fig. 1 is a block diagram schematically illustrating the structure of the control circuit of the present invention;

FIG. 2 is an electrical schematic diagram of the present invention;

FIG. 3 is a control flow diagram of the present invention;

fig. 4 is a schematic structural diagram of a multifunctional cook machine using a dc brushless motor according to the present invention.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following examples are further illustrated.

The multifunctional control circuit for a cook using a dc brushless motor according to the present invention will be further described with reference to fig. 1 to 3: a multifunctional control circuit of cook using DC brushless motor, which comprises an EMC circuit 1, an overcharge protection circuit 2, a rectification circuit 3, a power circuit 4, a DC brushless motor 5, an inversion driving circuit 6, a single chip IC1, a display circuit 7, a communication circuit 8, a touch key circuit 9, a rotary encoder circuit 10, a temperature sensing circuit 11 and a heating control circuit 12, wherein the single chip IC1 is FU6812L, the touch chip is CT8233, the commercial power input end is connected with the EMC circuit 1, the overcharge protection circuit 2 and the rectification circuit 3 provide working voltage for the whole control panel, the EMC circuit 1 is electrically connected with the rectification circuit 3 through the overcharge protection circuit 2, the rectification circuit 3 is electrically connected with the inversion driving circuit 6, the power circuit 4 is a conventional circuit, and provides low-voltage operation power for the whole drive panel, an inversion driving circuit 6, for driving the operation of the dc brushless motor, a conventional three-phase inversion and protection circuit is adopted, the inversion driving circuit 6 and a single-chip microcomputer IC1 single-chip microcomputer IC1 are further connected with a display circuit 7, a communication circuit 8, a touch key circuit 9, a rotary encoder circuit 10, a temperature sensing circuit 11 and a heating control circuit 12, the display circuit 7 adopts an LED module, the LED driving circuit is arranged in the module, the single-chip microcomputer IC1 sends display data to the display module through SPI, and can display information such as function, time, rotation speed, etc., the single-chip microcomputer IC1 is electrically connected with the temperature sensing circuit 11 through ADIN, the temperature sensing circuit 11 comprises an NTC temperature sensor RT1, the single-chip microcomputer IC1 realizes temperature detection through AD conversion, the touch key circuit 9, the rotary encoder circuit 10 is electrically connected with an IO port of the single-chip microcomputer IC1, the touch key circuit 9 can realize on/off operation, can select the function with the cooperation of gyration type encoder XN1, can regard as the pause key in the operation, gyration type encoder circuit includes two way gyration type encoders XN1, and wherein one way is function selection and rotational speed setting, and one way is the time setting, and the heating circuit is opened and shut control heater CN1 by relay K2 and is heated up.

EMC circuit 1 comprises four ann rule electric capacity C1, C2, C3, C4, common mode inductance L1, discharge resistance R2, the live wire of commercial power connects in proper order ann rule electric capacity C2, common mode inductance L1, ann rule electric capacity C3, one end of discharge resistance R2, ann rule electric capacity C2, common mode inductance L1, ann rule electric capacity C3, the other end of discharge resistance R2 is connected with the commercial power zero line, one end of ann rule electric capacity C1 connects the live wire of commercial power, another end connects the control panel bottom plate, ann rule electric capacity C4 one end connects the zero line of commercial power, another end connects the control panel bottom plate, EMC circuit 1 can the effective EMI harassment signal that filters the drive panel and produces.

The overcharge protection circuit 2 comprises a current-limiting resistor R1 and a relay K1, the current-limiting resistor R1 is connected with the relay K1 in parallel, the input end of the overshoot protection circuit is connected with the EMC circuit 1, the output end of the overshoot protection circuit is connected with the rectifying circuit 3, the relay K1 is disconnected during electrification, the direct current brushless motor 5 is in a stop state, and the filter capacitor is charged through the current-limiting resistor R1, so that overlarge impact on a main loop device caused by an overlarge charging circuit can be prevented. When charging is completed, relay K1 is closed, shorting current limiting resistor R1 and the subsequent circuit can begin to operate normally.

The rectifying circuit 3 comprises a rectifying bridge B1 and a high-voltage electrolytic capacitor E1, the alternating current end of the rectifying bridge B1 is connected with the overcharge protection circuit 2, the anode of the direct current end of the rectifying bridge B1 is connected with the inverter driving circuit 6 through the high-voltage electrolytic capacitor E1, the cathode of the rectifying bridge B1 is grounded with the cathode of the high-voltage electrolytic capacitor E1, and the rectifying circuit 3 converts the alternating current point into direct current.

The communication circuit 8 comprises a signal output circuit 81 and a signal input circuit 82, the signal output circuit 81 comprises a triode N1, a pull-up resistor R4 and a capacitor C7, the signal input circuit 82 comprises two capacitors C5, C6, a triode P1, two pull-down resistors R5 and R6, the signal output end of the singlechip IC1 is connected with the base of the signal output circuit triode N1, the emitter of the triode N1 is connected with a power supply voltage VCC through a pull-up resistor R4, the collector of the triode N1 is grounded, the signal output end thereof is connected with the input ends of a capacitor C7 and an upper computer control panel, the cathode of the capacitor C7 is grounded, the signal output end of the singlechip IC1 is connected with the pull-down resistor R5 and the emitter of the triode P1 through a current-limiting resistor R6, the cathode of the pull-down resistor R5 is grounded, the base of the triode P1 is connected with the output ends of the capacitor C6 and the upper computer control panel, and the cathode of the capacitor C, the communication circuit 8 adopts a triode driving mode, and the circuit can adapt to the condition that a communication line is longer and can also better adapt to an optical coupling isolation driving circuit of an upper computer.

The working principle is as follows: after power-on, the singlechip IC1 completes initialization, the display circuit 7 performs display processing, displays related information and performs communication processing, if an upper computer exists, the display circuit interacts with the upper computer, waits for a user to set functions and starts, if a [ start/stop ] button exists, and if the [ start/stop ] button originally exists, the display circuit is set to be in a start state, and the whole machine starts to run. If the starting state is originally the starting state, the state is set to the pause state. The user can modify the run time and the run speed. After the whole machine starts, the operation of bus capacitor pre-charging is firstly carried out, the relay K1 does not act, the bus capacitor is charged through the current-limiting resistor R1, the pre-charging time is up, the relay K1 acts, the current-limiting resistor R1 is short-circuited, the normal operation is driven, the detection and the processing of various protections are carried out, the fault of the whole machine is detected and processed, the communication is processed, whether the designed time is up or not is judged, and if the designed time is up, the setting is stopped, and the whole machine returns to the initial state.

The singlechip IC1 is used for realizing the control of three-phase inversion output and interacting with a main control board of the whole machine through the communication circuit 8; the EMI harassment signal that EMC circuit 1 can effectual filtering drive board produced, when overcharge protection circuit 2 was electrified, relay K1 disconnection, direct current brushless motor 5 was in the stall condition, charges for filter capacitor through current-limiting resistor R1, can prevent like this that too big charging circuit from causing too big impact to the major loop device. After charging is completed, the relay K1 is closed, the current-limiting resistor K1 is short-circuited, and a subsequent circuit can start to operate normally; the rectifying circuit 3 converts alternating current points into direct current to provide working voltage for the whole direct current brushless motor inverter driving circuit 3; the power circuit 4 provides a low-voltage operation power supply for the whole drive board of the conventional circuit; the communication circuit 8 adopts a triode driving mode, and the circuit can adapt to the condition that a communication line is longer and can also better adapt to an optical coupling isolation driving circuit of an upper computer; the touch key circuit 9 adopts a special touch chip, only one touch key is provided, and multiple paths of same touch circuits can be arranged as required in practical application. The touch can realize the on-off operation, the function can be selected by matching with the rotary encoder XN1, and the rotary encoder can be used as a pause key in operation. The touch chip has multiple choices, as the example of practical application, select for use CT8233, this is a one way touch button chip, can provide good touch button operation, two way gyration type encoder circuit 10, set for function selection and rotational speed all the way, set for the time all the way, be used for some functions that need the heating, heating circuit 12 selects according to the complete machine condition, control through relay K2, temperature sensor RT1 adopts high temperature resistant NTC temperature sensor, singlechip IC1 realizes the detection of temperature through AD conversion, heating circuit 12 and temperature detect circuit 11 cooperate, can realize better constant temperature heating.

The invention also provides a multifunctional cook machine adopting the direct current brushless motor, as shown in fig. 4, the multifunctional cook machine comprises a control circuit of the multifunctional cook machine adopting the direct current brushless motor, a transmission mechanism 001, a direct current brushless motor 5, a driving control panel 006, a display panel 007, a multifunctional basin 003 and a heating device 004, wherein the direct current brushless motor 005 is connected with the transmission mechanism 001, the lower end of the transmission mechanism 001 is connected with a stirring mechanism 002, the multifunctional basin 003 is arranged below the stirring mechanism 002, the heating device 004 is arranged below the multifunctional basin 003, and the direct current brushless motor 5, the heating device 004 and the display panel 007 are electrically connected with the driving control panel 006.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. A multifunctional cook control circuit adopting a direct-current brushless motor comprises a power circuit (4), the direct-current brushless motor (5), an inversion driving circuit (6) and a single chip microcomputer IC1, wherein the direct-current brushless motor (5) is connected with the inversion driving circuit (6), the power circuit (4) is connected with the inversion driving circuit (6), the inversion driving circuit (6) is connected with the single chip microcomputer IC1, the multifunctional cook control circuit is characterized by further comprising an EMC circuit (1), an overcharge protection circuit (2) and a rectification circuit (3), a mains supply input end is connected with the EMC circuit (1) and provides working voltage for the whole control panel through the overcharge protection circuit (2) and the rectification circuit (3), the EMC circuit (1) is electrically connected with the rectification circuit (3) through the overcharge protection circuit (2), and the rectification circuit (3) is electrically connected with the inversion driving circuit (6), singlechip IC1 still is connected with display circuit (7), communication circuit (8), touch button circuit (9), gyration type encoder circuit (10), temperature sensing circuit (11) and heating control circuit (12), the singlechip sends display data for display circuit (7) through SPI, the singlechip passes through ADIN and is connected with temperature sensing circuit (11) electricity, touch button circuit (9), gyration type encoder circuit (10) are connected with the IO mouth electricity of singlechip.

2. The multifunctional cook control circuit adopting the brushless DC motor according to claim 1, wherein the EMC circuit (1) is composed of four safety capacitors C1, C2, C3, C4, a common mode inductor L1 and a discharge resistor R2, the live wire of the commercial power is electrically connected with one end of a safety capacitor C2, a common mode inductor L1, a safety capacitor C3 and a discharge resistor R2 in sequence, the other end of the safety capacitor C2, the common mode inductor L1, the safety capacitor C3 and the discharge resistor R2 is electrically connected with the neutral wire of the commercial power, one end of the safety capacitor C1 is connected with the live wire of the commercial power, the other end of the safety capacitor C4 is connected with the neutral wire of the commercial power, and the other end of the safety capacitor C4 is connected with the control board.

3. The multifunctional cook machine control circuit using the DC brushless motor according to claim 2, wherein the overcharge protection circuit (2) comprises a current limiting resistor R1 and a relay K1, the current limiting resistor R1 and the relay K1 are connected in parallel, the input terminal of the overcharge protection circuit is connected with the EMC circuit (1), and the output terminal is electrically connected with the rectification circuit (3).

4. The control circuit of a multifunctional cook machine using a brushless DC motor according to claim 3, wherein said rectifier circuit (3) comprises a rectifier bridge B1 and a high voltage electrolytic capacitor E1, the AC terminal of said rectifier bridge B1 is electrically connected to the overcharge protection circuit (2), the anode of the DC terminal of said rectifier bridge B1 is electrically connected to the inverter driving circuit (6) through the high voltage electrolytic capacitor E1, and the cathode of the high voltage electrolytic capacitor E1 is grounded.

5. The multifunctional cook control circuit using a brushless DC motor according to claim 4, wherein said communication circuit (8) comprises a signal output circuit (81) and a signal input circuit (82), said signal output circuit (81) comprises a transistor N1, a pull-up resistor R4 and a capacitor C7, said signal input circuit (82) comprises two capacitors C5, C6, a transistor P1, two pull-down resistors R5, R6, said single chip microcomputer IC1 has a signal output terminal connected to the base of the signal output circuit transistor N1, said transistor N1 has an emitter terminal connected to the supply voltage VCC through a pull-up resistor R6348, said transistor N1 has a collector terminal connected to ground, its signal output terminal connected to the input terminals of a capacitor C7 and a host control board, the cathode of a capacitor C7 is connected to ground, said signal output terminal of the single chip microcomputer IC1 has a signal output terminal connected to the emitter terminal of a pull-down resistor R5 and the emitter terminal 1 of the transistor P8 through a current limiting resistor R6, the cathode of the current-limiting resistor R6 is grounded through a capacitor C5, the cathode of the pull-down resistor R5 is grounded, the base of the triode P1 is connected with the output ends of the capacitor C6 and the upper computer control board, and the cathode of the capacitor C6 is grounded.

6. The control circuit of a multifunctional cook machine using a brushless DC motor according to claim 5, wherein said rotary encoder circuit (10) comprises a two-way rotary encoder XN 1.

7. The control circuit of a multifunctional cook machine using a brushless DC motor according to claim 6, wherein said temperature sensing circuit (11) comprises an NTC temperature sensor RT 1.

8. The control circuit of multifunctional cook controller using DC brushless motor according to claim 7, wherein said heating control circuit (12) controls the heating of heater CN1 by opening and closing relay K2.

9. A multifunctional cook machine adopting a DC brushless motor, which comprises a transmission mechanism (001), the DC brushless motor (5), a drive control panel (006), a display panel (007), a multifunctional basin (003) and a heating device (004), wherein the DC brushless motor (5) is connected with the transmission mechanism (001), the lower end of the transmission mechanism (001) is connected with a stirring mechanism (002), the multifunctional basin (003) is arranged below the stirring mechanism (002), the heating device (004) is arranged below the multifunctional basin (003), and the DC brushless motor (5), the heating device (004) and the display panel (007) are electrically connected with the drive control panel (006).