CN216851808U - Motor control circuit and cooking machine - Google Patents

Abstract

The embodiment of the application provides a motor control circuit and cooking machine. The motor control circuit comprises a first power supply connecting end, a first switching end, a second power supply connecting end, a second switching end, a third switching end and a fourth switching end; and the reversing control circuit is connected with the first switching end, the second switching end, the third switching end and the fourth switching end, the reversing control circuit comprises a first state and a second state, the motor rotates in one direction in the first state, the first switching end and the fourth switching end are electrically connected through the reversing control circuit in the second state, and the second switching end and the third switching end are electrically connected through the reversing control circuit to enable the motor to rotate in the other direction. The cooking machine includes: the stirring device comprises a host, a four-pole brush motor, a stirring cup assembly, a stirring knife connected with the four-pole brush motor and a motor control circuit. The motor control circuit can control positive and negative rotation of the four-pole brush motor, and the circuit is simple.

Description

Motor control circuit and cooking machine

Technical Field

The embodiment of the application relates to the field of small household appliances, in particular to a motor control circuit and a food processor.

Background

With the increasing living standard of people, many different types of food processors appear on the market. The functions of the food processor mainly include, but are not limited to, functions of making soybean milk, squeezing fruit juice, making rice paste, mincing meat, shaving ice, making coffee and/or blending facial masks and the like. The food processor can comprise a soybean milk machine, a stirrer or a wall breaking food processor and other machines for crushing and stirring food materials.

Some cooking machines include the motor, and the motor can drive the stirring sword and whip edible material, and the motor can positive and negative and reversal, and the circuit of controlling the motor corotation and reversal is more complicated nevertheless.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of this application is to provide a motor control circuit and cooking machine, the circuit is simple.

The utility model provides a motor control circuit is used for controlling the quadrupole and has brushed the motor, the quadrupole has brushed the motor and includes first carbon brush, second carbon brush, third carbon brush and fourth carbon brush, and with first excitation coil that first carbon brush corresponds, with second excitation coil that the second carbon brush corresponds, with third excitation coil that the third carbon brush corresponds and with the fourth excitation coil that the fourth carbon brush corresponds, first excitation coil with second excitation coil sets up and connects in parallel relatively, third excitation coil with fourth excitation coil sets up and connects in parallel relatively, its characterized in that, motor control circuit includes:

a first power connection terminal electrically connected to one end of the first field coil;

a first switching terminal electrically connected to the other end of the first field coil;

a second power connection terminal electrically connected to one end of the third exciting coil;

a second switching terminal electrically connected to the other end of the third field coil;

the third switching end is electrically connected with the first carbon brush and the second carbon brush;

the fourth switching end is electrically connected with the third carbon brush and the fourth carbon brush;

the reversing control circuit comprises a first switching end, a second switching end, a third switching end and a fourth switching end which are connected, the reversing control circuit comprises a first state and a second state, the first switching end and the third switching end are connected through the reversing control circuit, the second switching end and the fourth switching end are connected through the reversing control circuit, so that the four-pole brush motor rotates in one direction, the first switching end and the fourth switching end are connected through the reversing control circuit, the second switching end and the third switching end are connected through the reversing control circuit, and the four-pole brush motor rotates in the other direction.

In some embodiments, in the first state, the first excitation coil is connected in parallel with the second excitation coil and then connected in series between the first carbon brush and the second carbon brush, and the third excitation coil is connected in parallel with the fourth excitation coil and then connected in series between the third carbon brush and the fourth carbon brush, so that the four-pole brushed motor is driven to rotate in one direction; and in the second state, the first switching end and the fourth switching end are electrically connected through the reversing control circuit, the first excitation coil and the second excitation coil are connected in parallel and then connected in series between the third carbon brush and the fourth carbon brush, meanwhile, the third excitation coil and the fourth excitation coil are connected in parallel and then connected in series between the first carbon brush and the second carbon brush, and the four-pole brush motor is driven to rotate in the other direction. So, set up first switching end, second switching end, third switching end, fourth switching end and switching-over control circuit, the quadrupole has the brush motor to realize corotation and reversal, and first carbon brush and second carbon brush are connected simultaneously in third switching end, and third carbon brush and fourth carbon brush are connected simultaneously in fourth switching end to it is few to go out the line, and switching-over control circuit is simple, and the cost is lower, and circuit connection is stable.

Optionally, the motor control circuit further comprises a blocking inductor connected in series with the first and second field coils in parallel and connected in series with the third and fourth field coils in parallel.

In some embodiments, the retarding inductor provides reverse resistance for the rotor of the four-pole brush motor after the four-pole brush motor stops being electrified, so that reverse braking is performed, the motor control circuit can timely stop the rotation of the four-pole brush motor after the four-pole brush motor stops being electrified, and the circuit is simple and low in cost.

Optionally, the blocking inductance comprises: one end of the first retardation inductor is electrically connected to the second carbon brush, and the other end of the first retardation inductor is electrically connected to the third switching end; one end of the second retardation inductor is electrically connected to the first carbon brush, and the other end of the second retardation inductor is electrically connected to the third switching end; one end of the third retardation inductor is electrically connected to the fourth carbon brush, and the other end of the third retardation inductor is electrically connected to the fourth switching end; and one end of the fourth retardation inductor is electrically connected to the third carbon brush, and the other end of the fourth retardation inductor is electrically connected to the fourth switching end.

In some embodiments, a plurality of retarding inductors can realize rapid braking, so that the braking effect is good, and the outgoing line is less.

Optionally, the first blocking inductor is connected in series between the second carbon brush and the second blocking inductor; and/or the third retarding inductor is connected in series between the fourth carbon brush and the fourth retarding inductor.

In some embodiments, after the four-pole brushed motor stops being powered on, the first blocking inductor and the third blocking inductor can better play a braking role, and the circuit is simple.

Optionally, the motor control circuit further comprises a temperature controller, and the temperature controller is connected to the first power connection end and/or the second power connection end in series.

In some embodiments, the temperature controller can detect the temperature of the four-pole brush motor in real time, and the connection is disconnected when the temperature is too high, so that the damage of the four-pole brush motor caused by overheating is prevented.

Optionally, the commutation control circuit includes a double-pole double-throw switch, and the double-pole double-throw switch is electrically connected to the first switching end, the second switching end, the third switching end, and the fourth switching end.

In some embodiments, the double-pole double-throw switch has a simple structure, a simple switching mode and low use cost, so that the motor control circuit has a simple structure and low cost.

Optionally, the double-pole double-throw switch comprises a first sub-switch and a second sub-switch, the first sub-switch comprises a first movable contact, a first fixed contact and a second fixed contact, and the second sub-switch comprises a second movable contact, a third fixed contact and a fourth fixed contact;

the first movable contact is electrically connected with the first switching end, the first fixed contact is electrically connected with the third switching end, the second fixed contact is electrically connected with the fourth switching end, the second movable contact is electrically connected with the second switching end, the third fixed contact is electrically connected with the fourth switching end, and the fourth fixed contact is electrically connected with the third switching end; or

The first movable contact is electrically connected with the third switching end, the first fixed contact is electrically connected with the first switching end, the second fixed contact is electrically connected with the second switching end, the second movable contact is electrically connected with the fourth switching end, the third fixed contact is electrically connected with the second switching end, and the fourth fixed contact is electrically connected with the first switching end.

In some embodiments, the double-pole double-throw switch can simultaneously realize the switching of a plurality of switching terminals, so that the circuit structure is simple and reliable.

Optionally, the motor control circuit includes a controller, the commutation control circuit further includes a triode electrically connected to the double-pole double-throw switch, and a base of the triode is electrically connected to the controller.

In some embodiments, the controller can control the double-pole double-throw switch through the triode to realize the state switching of the commutation control circuit, and the cost is low.

Optionally, the motor control circuit further includes a protection switch electrically connected to the first power connection terminal or the second power connection terminal.

In some embodiments, the four-pole brush motor can normally work only after the protection switch is connected, and the safety is improved.

The application also provides a cooking machine, include: the host comprises a four-pole brush motor; the stirring cup assembly is arranged on the host machine and comprises a stirring knife connected with the four-pole brush motor; and the motor control circuit.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

Fig. 1 is a schematic view of an embodiment of a food processor of the present application;

FIG. 2 is a partial circuit diagram of one embodiment of the motor control circuit of the present application;

fig. 3 is another circuit diagram of a portion of the motor control circuit of the embodiment shown in fig. 2.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" includes two, and is equivalent to at least two. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Fig. 1 is a schematic view of an embodiment of a food processor 1 according to the present application. Food processor 1 includes: the stirring device comprises a main machine 2, a stirring cup assembly 3 arranged on the main machine 2 and a motor control circuit 4 (shown in figures 2 and 3); the main machine 2 comprises a four-pole brush motor 21 arranged inside the main machine 2, and the stirring cup assembly 3 comprises a stirring knife (not shown) connected with the four-pole brush motor 21. In some embodiments, the motor control circuit 4 is disposed in the main body 2, the stirring cup assembly 3 includes a cup body assembly 31 and a cup lid assembly 32 capable of covering the cup body assembly 31, and the stirring blade is connected to the four-pole brush motor 21 in the main body 2 and extends into the cup body assembly 31 to rotate so as to stir the food material. Can hold edible material in the stirring cup subassembly 3, beat and/or heat the edible material etc. in stirring cup subassembly 3.

In the correlation technique, cooking machine 1 adopts two-pole motor, and two-pole motor low-speed torsion is less, can't realize functions such as kneading dough, stir-fry, and the low-speed during operation temperature rise is higher, shortens motor life. The utility model provides a cooking machine 1 adopts four poles to have brush motor 21 to control stirring sword, refer to fig. 2, four poles have brush motor 21 to include first carbon brush 211, the second carbon brush 212, third carbon brush 213 and fourth carbon brush 214, and the first excitation coil L1 that corresponds with first carbon brush 211, the second excitation coil L2 that corresponds with second carbon brush 212, the third excitation coil L3 that corresponds with third carbon brush 213 and the fourth excitation coil L4 that corresponds with fourth carbon brush 214, first excitation coil L1 and second excitation coil L2 set up relatively and parallelly connected, third excitation coil L3 and fourth excitation coil L4 set up relatively and parallelly connected. Torsion is great when the quadrupole has brush motor 21 not only low-speed, and the quadrupole has brush motor 21 itself and its required controller 6 low cost, so the cooking machine 1 of this application possess the ability of good low-speed stirring to eat the material, can realize well kneading dough and stir-fry dish, and the cost is lower. The food processor 1 may be a dough maker or a cooker, or other type of food processor 1. In some embodiments, the blending knife needs to be switched between forward rotation and reverse rotation to achieve better processing of the food material.

The motor control circuit 4 is used for controlling the four-pole brushed motor 21, and includes: a first power connection terminal 41 electrically connected to one end of the first exciting coil L1, a first switching terminal 43 electrically connected to the other end of the first exciting coil L1, a second power connection terminal 42 electrically connected to one end of the third exciting coil L3, and a second switching terminal 44 electrically connected to the other end of the third exciting coil L3; a third switching terminal 45 electrically connected to the first and second carbon brushes 211 and 212, a fourth switching terminal 46 electrically connected to the third and fourth carbon brushes 213 and 214, and a commutation control circuit 50. In the illustrated embodiment, the mains power is connected to the first power connection 41 and the second power connection 42 from the outside of the main body 2, and drives the four-pole brush motor 21 to rotate. The commutation control circuit 50 is connected with the first switching terminal 43, the second switching terminal 44, the third switching terminal 45 and the fourth switching terminal 46, the commutation control circuit 50 includes a first state and a second state, in the first state, the first switching terminal 43 and the third switching terminal 45 are electrically connected through the commutation control circuit 50, the second switching terminal 44 and the fourth switching terminal 46 are electrically connected through the commutation control circuit 50, so that the four-pole brushed motor 21 rotates in one direction a; in the second state, the first switching terminal 43 and the fourth switching terminal 46 are electrically connected through the commutation control circuit 50, and the second switching terminal 44 and the third switching terminal 45 are electrically connected through the commutation control circuit 50, so that the four-pole brushed motor 21 is rotated in the other direction b. In some embodiments, since the food processor 1 uses the four-pole brushed motor 21, in the first state, the first switching terminal 43 and the third switching terminal 45 are electrically connected through the commutation control circuit 50, and the second switching terminal 44 and the fourth switching terminal 46 are electrically connected through the commutation control circuit 50, which is equivalent to that after the first excitation coil L1 is connected in parallel with the second excitation coil L2, the first excitation coil L1 is connected in series between the first carbon brush 211 and the second carbon brush 212, and after the third excitation coil L3 is connected in parallel with the fourth excitation coil L4, one end is connected to the third carbon brush 213, and the other end is electrically connected to the fourth carbon brush 214, so that the four-pole brushed motor 21 provides an excitation magnetic field through the four excitation coils L1/L2/L3/L4, and the rotor winding cuts the magnetic induction lines to drive the four-pole brushed motor 21 to rotate in the direction a; in the second state, the first switching end 43 and the fourth switching end 46 are electrically connected through the commutation control circuit 50, the second switching end 44 and the third switching end 45 are electrically connected through the commutation control circuit 50, which is equivalent to that after the first excitation coil L1 is connected in parallel with the second excitation coil L2, one end is connected to the third carbon brush 213, and the other end is electrically connected to the fourth carbon brush 214, and after the third excitation coil L3 is connected in parallel with the fourth excitation coil L4, the third excitation coil L3878 is connected in series between the first carbon brush 211 and the second carbon brush 212, at this time, the four-pole brushed motor 21 provides an excitation magnetic field through the four excitation coils L1/L2/L3/L4, the rotor winding cuts the magnetic induction lines, and the four-pole brushed motor 21 is driven to rotate in the direction b. The direction a may be a forward direction and the direction b may be a reverse direction. Or direction a may be the reverse direction and direction b may be the forward direction. So, set up first switching end, second switching end, third switching end, fourth switching end and switching-over control circuit, the quadrupole has the brush motor can realize corotation and reversal, because first carbon brush 211 and second carbon brush 212 electricity connection third switching end 45 simultaneously, and fourth switching end 46 is connected to third carbon brush 213 and fourth carbon brush 214 electricity simultaneously to it is few to be qualified for the next round of competitions, and switching-over control circuit 50 circuit is simple, and the cost is lower, and circuit connection is stable. The stirring knife in the food processor 1 using the motor control circuit 4 can realize positive rotation and reverse rotation, can well realize processing of food materials, and has the advantages of simple circuit and low cost.

In some embodiments, the motor control circuit 4 further includes a blocking inductor 47, and the blocking inductor 47 is connected in series with the first excitation coil L1 and the second excitation coil L2 which are connected in parallel, and is connected in series with the third excitation coil L3 and the fourth excitation coil L4 which are connected in parallel. In the working process of the food processor 1, the rotation of the blade needs to be stopped in time after the food material is processed. In some embodiments, the retarding inductor 47 provides a reverse resistance to the rotor of the four-pole brushed motor 21 after the power supply is stopped, so as to perform a reverse braking, and thus, the motor control circuit 4 can stop the rotation of the four-pole brushed motor 21 in time after the power supply of the four-pole brushed motor 21 is stopped.

In some embodiments, the blocking inductance 47 includes a first blocking inductance La, a second blocking inductance Lb, a third blocking inductance Lc, and a fourth blocking inductance Ld. One end of the first retardation inductor La is electrically connected to the second carbon brush 212, and the other end is electrically connected to the third switching end 45; one end of the second retardation inductor Lb is electrically connected to the first carbon brush 211, and the other end is electrically connected to the third switching end 45; one end of the third retardation inductance Lc is electrically connected to the fourth carbon brush 214, and the other end is electrically connected to the fourth switching end 46; one end of the fourth retardation inductor Ld is electrically connected to the third carbon brush 213, and the other end is electrically connected to the fourth switching terminal 46. In some embodiments, a plurality of retardant inductance 47 can realize quick braking, so, can realize the quick brake function of 1 stirring sword of cooking machine, the cooking machine 1 security of this application is high. In some embodiments, the blocking inductance 47 may include any one or more of the first blocking inductance La, the second blocking inductance Lb, the third blocking inductance Lc, and the fourth blocking inductance Ld, as desired.

Referring to fig. 2, in some embodiments, the first blocking inductance La is connected in series between the second carbon brush 212 and the second blocking inductance Lb. Therefore, the first retarding inductor La and the second retarding inductor Lb are connected in series, and after the four-pole brushed motor 21 stops being electrified, the first retarding inductor La can better play a braking role, and the circuit is simple. In some embodiments, the third blocking inductance Lc is connected in series between the fourth carbon brush 214 and the fourth blocking inductance Ld. The third blocking inductor Lc is connected in series with the fourth blocking inductor Ld, and after the four-pole brushed motor 21 stops being powered on, the third blocking inductor Lc can better play a role in braking, and the circuit is simple.

In some embodiments, the food processor 1 further includes a heating component, which can realize functions of cooking, etc., and heat can be transferred to the four-pole brush motor 21 through other components, in addition, the four-pole brush motor 21 can also generate heat due to high-speed rotation, and for avoiding damage caused by overhigh temperature inside the four-pole brush motor 21, in some embodiments, the motor control circuit 4 further includes a temperature controller 48, and the temperature controller 48 is connected to the first power connection end 41 and/or the second power connection end 42 in series. Therefore, the temperature of the four-pole brush motor 21 can be detected in real time, the connection is disconnected when the temperature is too high, the four-pole brush motor 21 is prevented from being damaged due to overheating, the safety of a circuit is improved, and the safety of the food processor 1 is high.

In some embodiments, the commutation control circuit 50 includes a double pole double throw switch 5, and the double pole double throw switch 5 is electrically connected to the first switch terminal 43, the second switch terminal 44, the third switch terminal 45, and the fourth switch terminal 46. The double pole double throw switch 5 includes a first sub-switch 51 and a second sub-switch 52, the first sub-switch 51 including a first movable contact 511, a first stationary contact 53 and a second stationary contact 54, and the second sub-switch 52 including a second movable contact 521, a third stationary contact 55 and a fourth stationary contact 56. In some embodiments, the double-pole double-throw switch 5 has a simple structure, a simple replacement method and low use cost, so that the motor control circuit 4 has a simple structure and low cost.

Referring to fig. 2, in the illustrated embodiment, the double-pole double-throw switch 5 is a double-pole double-throw relay RLY1, and the first movable contact 511 is controlled to be connected to the first fixed contact 53, while the second movable contact 521 is connected to the third movable contact; or the first movable contact 511 is connected to the second stationary contact 54 while the second movable contact 521 is connected to the fourth movable contact. In some embodiments, the first movable contact 511 is electrically connected to the first switching terminal 43, the first fixed contact 53 is electrically connected to the third switching terminal 45, the second fixed contact 54 is electrically connected to the fourth switching terminal 46, the second movable contact 521 is electrically connected to the second switching terminal 44, the third fixed contact 55 is electrically connected to the fourth switching terminal 46, and the fourth fixed contact 56 is electrically connected to the third switching terminal 45. In other embodiments, the first movable contact 511 is electrically connected to the third switch terminal 45, the first fixed contact 53 is electrically connected to the first switch terminal 43, the second fixed contact 54 is electrically connected to the second switch terminal 44, the second movable contact 521 is electrically connected to the fourth switch terminal 46, the third fixed contact 55 is electrically connected to the second switch terminal 44, and the fourth fixed contact 56 is electrically connected to the first switch terminal 43. In this way, the commutation control circuit 50 can simply switch the commutation control circuit 50 between the first state and the second state, and the circuit structure is simple and reliable.

Fig. 3 is another circuit diagram of a portion of the motor control circuit of the embodiment shown in fig. 2. in the illustrated embodiment, the motor control circuit 4 includes a controller 6, a thyristor 7, a voltage step-down module 8, an EMC module 9, and a switching power supply module 10. One end of the controlled silicon 7 is electrically connected with the mains supply, the other end of the controlled silicon 7 is electrically connected with the four-pole brush motor 21, the controller 6 can control the rotating speed of the four-pole brush motor 21 and control the start and stop of the four-pole brush motor 21 through the controlled silicon 7, and therefore food can be processed in different degrees. The switching power supply module 10 may control a power switch. The voltage reduction module 8 can realize the conversion from the mains supply to the alternating current required by the four-pole brush motor 21. The EMC module 9 comprises a fuse and a filter circuit, the fuse can effectively protect the circuit, and the filter circuit can filter out interference. Thus, the motor control circuit 4 has high safety and high reliability.

In some embodiments, the controller 6 is a single chip, and controls different modules through different ports. In the embodiment shown in fig. 2, the commutation control circuit 50 further includes a transistor 57 electrically connected to the double-pole double-throw switch 5, wherein a base of the transistor 57 is electrically connected to the controller 6, a collector of the transistor 57 is electrically connected to the double-pole double-throw switch 5, and an emitter of the transistor is grounded, so that the controller 6 can control the double-pole double-throw switch 5 through the transistor 57 to change the state of the commutation control circuit 50.

In some embodiments, the motor control circuit 4 further includes a protection switch 11 electrically connected to the first power connection terminal 41 or the second power connection terminal 42. In some embodiments, the protection switch 11 is electrically connected to a lid circuit (not shown) via the controller 6, and the lid circuit can control the protection switch 11 to be switched on and off. Thus, the motor control circuit 4 is highly safe.

In the embodiment shown in fig. 2 and 3, the protection switch 11 and the controllable silicon 7 cooperatively control the forward and reverse rotation and braking of the four-pole brush motor 21, so that the motor control circuit 4 of the present application has high safety. In some embodiments, direction a is forward and direction b is reverse. The specific implementation steps of the control of the four-pole brush motor 21 from start to forward rotation are as follows: firstly, the controller 6 controls the double-pole double-throw switch 5 to switch to a first state of the reversing control circuit 50; secondly, a protection switch 11 is connected; and thirdly, controlling the conduction of the controllable silicon 7. The control implementation steps of the four-pole brush motor 21 from starting to reverse are as follows: firstly, the controller 6 controls the double-pole double-throw switch 5 to switch to the second state of the reversing control circuit 50; secondly, a protection switch 11 is connected; and thirdly, controlling the conduction of the controllable silicon 7. After the protection switch 11 is closed, the four-pole brush motor 21 can normally work, and the protection switch 11 plays a role in protection. The forward rotation brake of the four-pole brush motor 21 comprises the following specific implementation steps: firstly, turning off the controllable silicon 7; secondly, the protection switch 11 is switched off; and thirdly, the controller 6 controls the double-pole double-throw switch 5 to switch the state of the commutation control circuit 50 from the first state to the second state. The specific implementation steps of the four-pole brush motor 21 reverse braking are as follows: firstly, turning off the controllable silicon 7; secondly, the protection switch 11 is switched off; and thirdly, the controller 6 controls the double-pole double-throw switch 5 to switch the state of the commutation control circuit 50 from the second state to the first state. Therefore, the four-pole brush motor 21 can be stopped in time after the power supply is cut off, and the brake function of the four-pole brush motor 21 is realized. In some embodiments, when the four-pole brushed motor 21 rotates forward, the controller 6 may directly control the double-pole double-throw switch 5 to switch the state of the commutation control circuit 50 from the first state to the second state, and the four-pole brushed motor 21 rotates backward; when the four-pole brushed motor 21 rotates reversely, the controller 6 may directly control the double-pole double-throw switch 5 to switch the state of the commutation control circuit 50 from the second state to the first state, so that the four-pole brushed motor 21 rotates forward. So, motor control circuit 4 steerable quadrupole has brush motor 21 to switch between just reversing, and cooking machine 1 can realize the stir-fry function etc. to eating the material.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (10)

1. The utility model provides a motor control circuit for control quadrupole has brush motor (21), quadrupole has brush motor (21) includes first carbon brush (211), second carbon brush (212), third carbon brush (213) and fourth carbon brush (214), and with first excitation coil that first carbon brush (211) corresponds, with the second excitation coil that second carbon brush (212) corresponds, with the third excitation coil that third carbon brush (213) corresponds and with the fourth excitation coil that fourth carbon brush (214) corresponds, first excitation coil with second excitation coil sets up relatively and connects in parallel, third excitation coil with fourth excitation coil sets up relatively and connects in parallel, its characterized in that, motor control circuit includes:

a first power connection terminal (41) electrically connected to one end of the first field coil;

a first switching terminal (43) electrically connected to the other end of the first field coil;

a second power connection terminal (42) electrically connected to one end of the third excitation coil;

a second switching terminal (44) electrically connected to the other end of the third field coil;

a third switching terminal (45) electrically connected to the first carbon brush (211) and the second carbon brush (212);

a fourth switching terminal (46) electrically connected to the third carbon brush (213) and the fourth carbon brush (214);

a commutation control circuit (50) connected to the first switching terminal (43), the second switching terminal (44), the third switching terminal (45), and the fourth switching terminal (46), the commutation control circuit (50) including a first state in which the first switching terminal (43) and the third switching terminal (45) are electrically connected through the commutation control circuit (50), the second switching terminal (44) and the fourth switching terminal (46) are electrically connected through the commutation control circuit (50), making the four-pole brushed motor (21) rotate in one direction, and a second state in which the first switching terminal (43) and the fourth switching terminal (46) are electrically connected through the commutation control circuit (50), the second switching terminal (44) and the third switching terminal (45) are electrically connected through the commutation control circuit (50), the four-pole brush motor (21) is rotated in the other direction.

2. The motor control circuit of claim 1, further comprising a blocking inductance (47), the blocking inductance (47) being connected in series with the first and second field coils in parallel and in series with the third and fourth field coils in parallel.

3. The motor control circuit of claim 2 wherein said blocking inductance comprises:

a first retardation inductor having one end electrically connected to the second carbon brush (212) and the other end electrically connected to the third switching end (45);

a second retardation inductor having one end electrically connected to the first carbon brush (211) and the other end electrically connected to the third switching end (45);

a third retardation inductor having one end electrically connected to the fourth carbon brush (214) and the other end electrically connected to the fourth switching end (46); and

and a fourth retardation inductor having one end electrically connected to the third carbon brush (213) and the other end electrically connected to the fourth switching end (46).

4. The motor control circuit according to claim 3, wherein the first blocking inductance is connected in series between the second carbon brush (212) and the second blocking inductance; and/or the third blocking inductance is connected in series between the fourth carbon brush (214) and the fourth blocking inductance.

5. The motor control circuit according to claim 1, further comprising a thermostat (48), wherein the thermostat (48) is connected in series to the first power connection terminal (41) and/or the second power connection terminal (42).

6. The motor control circuit according to claim 1, characterized in that the commutation control circuit (50) comprises a double pole double throw switch (5), the double pole double throw switch (5) being electrically connected with the first switching terminal (43), the second switching terminal (44), the third switching terminal (45), the fourth switching terminal (46).

7. The motor control circuit according to claim 6, characterized in that the double pole double throw switch (5) comprises a first sub-switch (51) and a second sub-switch (52), the first sub-switch (51) comprising a first movable contact (511), a first stationary contact (53) and a second stationary contact (54), the second sub-switch (52) comprising a second movable contact (521), a third stationary contact (55) and a fourth stationary contact (56);

the first movable contact (511) is electrically connected with the first switching terminal (43), the first fixed contact (53) is electrically connected with the third switching terminal (45), the second fixed contact (54) is electrically connected with the fourth switching terminal (46), the second movable contact (521) is electrically connected with the second switching terminal (44), the third fixed contact (55) is electrically connected with the fourth switching terminal (46), and the fourth fixed contact (56) is electrically connected with the third switching terminal (45); or

The first movable contact (511) is electrically connected with the third switching terminal (45), the first fixed contact (53) is electrically connected with the first switching terminal (43), the second fixed contact (54) is electrically connected with the second switching terminal (44), the second movable contact (521) is electrically connected with the fourth switching terminal (46), the third fixed contact (55) is electrically connected with the second switching terminal (44), and the fourth fixed contact (56) is electrically connected with the first switching terminal (43).

8. The motor control circuit of claim 7, wherein the motor control circuit comprises a controller (6), and wherein the commutation control circuit (50) further comprises a transistor (57) electrically connected to the double pole double throw switch (5), the base of the transistor (57) being electrically connected to the controller (6).

9. The motor control circuit according to claim 1, characterized in that it further comprises a protection switch (11) electrically connected to said first power supply connection terminal (41) or said second power supply connection terminal (42).

10. A food processor, its characterized in that, it includes:

a main machine (2) comprising a four-pole brush motor (21);

the stirring cup assembly (3) is arranged on the host (2) and comprises a stirring knife connected with the four-pole brush motor (21); and

a motor control circuit according to any of claims 1 to 9.

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