Four-pole motor brake control circuit and food processor

Abstract

The utility model discloses a quadrupole motor brake control circuit and a food processor. The control circuit comprises a control module, a safety switch SW, a motor, a first driving module, a second driving module and relays RY1-RY3. Through the structure, a motor braking function within 1.5 S can be realized on the quadrupole motor, so that the quadrupole motor is widely applied to small household appliances such as a stirrer and a meat grinder; and meanwhile, the principle is clear and simple, the operation is convenient, and the phenomenon of motor burnout caused by wrong wiring on a mechanical structure can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of food processors, and in particular to a four-pole motor brake control circuit and a food processor. Background Technology

[0002] Existing four-pole motors on the market consist of a pair of N-pole coils and a pair of S-pole coils, driving the rotor assembly to rotate through multiple magnetic fields. They have the advantages of high speed and high torque. However, when these four-pole motors are used in small household appliances such as blenders, meat grinders, food processors, and food processors, they cannot meet the safety standard of IEC 60335 to stop the motor 1.5 seconds after power failure. Therefore, there is an urgent need for a four-pole motor braking control circuit and a food processor to solve the above problems. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a four-pole motor brake control circuit.

[0004] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a four-pole motor brake control circuit, including a control module, a safety switch SW, a motor, a first drive module, a second drive module, and relays RY1-RY3;

[0005] The motor has a main winding and an auxiliary winding;

[0006] The input terminals of the first drive module and the second drive module are connected to the control module;

[0007] The coil of relay RY1 is connected to the output terminal of the first drive module. One end of the normally open contact of relay RY1 is connected to the power supply ACL, and the other end of the normally open contact of relay RY1 is connected to one end of the main winding of the motor and one end of the normally open contact of relay RY2.

[0008] The other end of the normally open contact of relay RY2 and one end of the normally closed contact of relay RY2 are connected to one end of the auxiliary winding of the motor. The other end of the normally closed contact of relay RY2 and one end of the normally closed contact of relay RY3 are connected. The coils of relay RY2 and relay RY3 are connected to the second drive module and the +5V power supply.

[0009] One end of the normally open contact of relay RY3 is connected to the other end of the main winding of the motor, and the other end of the normally open contact and the other end of the normally closed contact of relay RY3 are connected to the other end of the auxiliary winding of the motor.

[0010] One end of the safety switch SW is connected to the power supply ACN, and the other end of the safety switch SW is connected to the control module and the other end of the main winding of the motor.

[0011] As one of the preferred embodiments of this utility model, the first driving module includes a transistor Q2, a resistor R4 and a diode FD1. The base of the transistor Q2 is connected to the control module via the resistor R4, the emitter of the transistor Q2 is connected to the control module, the collector of the transistor Q2 is connected to one end of the coil of the relay RY1 and the anode of the diode FD1, and the cathode of the diode FD1 is connected to the other end of the coil of the relay RY1.

[0012] As one of the preferred embodiments of this utility model, a four-pole motor brake control circuit further includes a third drive module and a thyristor TR1. The input terminal of the third drive module is connected to the control module, the output terminal of the third drive module is connected to the control terminal of the thyristor TR1, the input terminal of the thyristor TR1 is connected to the power supply ACL, and the output terminal of the thyristor TR1 is connected to one end of the normally open contact of the relay RY1.

[0013] As one of the preferred embodiments of this utility model, the third driving module includes a transistor Q3, a resistor R3, and resistors R6-R7. The base of transistor Q3 is connected to the control module via resistor R3, the emitter of transistor Q3 is connected to the first driving module, the collector of transistor Q3 is connected to one end of resistor R7 and the control terminal of thyristor TR1 via resistor R6, and the other end of resistor R7 is connected to the input terminal of thyristor TR1 and the power supply ACL.

[0014] As one of the preferred embodiments of this utility model, the second driving module includes a transistor Q1, a resistor R5, and a diode FD2. The base of transistor Q1 is connected to the control module via resistor R5, the emitter of transistor Q1 is connected to the control module, the collector of transistor Q1 is connected to the cathode of diode FD2, one end of the coil of relay RY1, one end of the coil of relay RY2, and one end of the coil of relay RY3, respectively, and the anode of diode FD2 is connected to the other end of the coil of relay RY2 and the other end of the coil of relay RY3, respectively.

[0015] As one of the preferred embodiments of this utility model, a four-pole motor brake control circuit further includes resistors R1 and R2 connected in series between the other end of the safety switch SW and the control module.

[0016] A food processor, including the aforementioned control circuit.

[0017] The beneficial effects of this utility model are as follows: A four-pole motor brake control circuit and a food processor, the control circuit includes a control module, a safety switch SW, a motor, a first drive module, a second drive module, and relays RY1-RY3; the above structure enables the motor to brake within 1.5 seconds on a four-pole motor, thereby allowing the four-pole motor to be widely used in small household appliances such as blenders and meat grinders; at the same time, its principle is clear and simple, and it is easy to operate, avoiding the phenomenon of motor burnout caused by incorrect wiring in the mechanical structure. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a circuit diagram of a four-pole motor brake control circuit. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. Any descriptions used only to distinguish technical features, and not to indicate or imply relative importance, the quantity of indicated technical features, or the order of the indicated technical features, should not be construed as indicating the relative importance of the features or implying the order of the indicated technical features.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Reference Figure 1 A four-pole motor brake control circuit includes a control module 10, a safety switch SW, a motor 20, a first drive module 30, a second drive module 40, and relays RY1-RY3.

[0025] Motor 20 has a main winding and an auxiliary winding;

[0026] The input terminals of the first drive module 30 and the second drive module 40 are connected to the control module 10.

[0027] The coil of relay RY1 is connected to the output terminal of the first drive module 30. One end of the normally open contact of relay RY1 is connected to the power supply ACL, and the other end of the normally open contact of relay RY1 is connected to one end of the main winding of motor 20 and one end of the normally open contact of relay RY2, respectively.

[0028] The other end of the normally open contact of relay RY2 and one end of the normally closed contact of relay RY2 are connected to one end of the auxiliary winding of motor 20. The other end of the normally closed contact of relay RY2 and one end of the normally closed contact of relay RY3 are connected. The coils of relay RY2 and relay RY3 are connected to the second drive module 40 and the +5V power supply.

[0029] One end of the normally open contact of relay RY3 is connected to the other end of the main winding of motor 20, and the other end of the normally open contact and the other end of the normally closed contact of relay RY3 are connected to the other end of the auxiliary winding of motor 20.

[0030] One end of the safety switch SW is connected to the power supply ACN, and the other end of the safety switch SW is connected to the control module 10 and the other end of the main winding of the motor 20.

[0031] In this invention, when the safety switch SW is closed, the auxiliary winding of motor 20 is short-circuited through the normally closed contacts of relays RY2 and RY3, and the main winding of motor 20 is energized, enabling normal operation of the motor. When the safety switch SW is open, the control module 10 detects the disconnection signal and controls relay RY1 to disconnect the power supply ACL and ACN. Simultaneously, the control module 10 supplies power to relays RY2 and RY3, causing the normally open contacts of relays RY2 and RY3 to close. At this time, one wire of the main winding of motor 20 is short-circuited with one wire of the auxiliary winding of motor 20, and the other wire of the main winding of motor 20 is short-circuited with the auxiliary winding of motor 20. A short circuit in the other wire of the winding creates a reverse current, causing the magnetic field of motor 20 to become the opposite of that during normal operation. The reverse force stops the rotor of motor 20 within a specified time, short-circuiting the linkage between the main winding and the auxiliary winding of motor 20, thus achieving the braking function. In some embodiments, relays RY1-RY3 can also be implemented using microswitches. The advantages of this invention are: the above structure enables a 1.5-second motor braking function on a four-pole motor, allowing for the widespread application of four-pole motors in small household appliances such as mixers and meat grinders; at the same time, its principle is clear and simple, and it is easy to operate, avoiding motor burnout caused by incorrect wiring in the mechanical structure.

[0032] In some embodiments, the first driving module 30 includes a transistor Q2, a resistor R4, and a diode FD1. The base of transistor Q2 is connected to the control module 10 via resistor R4, the emitter of transistor Q2 is connected to the control module 10, the collector of transistor Q2 is connected to one end of the coil of relay RY1 and the anode of diode FD1, and the cathode of diode FD1 is connected to the other end of the coil of relay RY1. The control module 10 controls the coil of relay RY1 to be energized and de-energized through transistor Q2, thereby controlling the energization and de-energization of motor 20.

[0033] In some embodiments, a four-pole motor brake control circuit further includes a third drive module 50 and a thyristor TR1. The input terminal of the third drive module 50 is connected to the control module 10, the output terminal of the third drive module 50 is connected to the control terminal of the thyristor TR1, the input terminal of the thyristor TR1 is connected to the power supply ACL, and the output terminal of the thyristor TR1 is connected to one end of the normally open contact of the relay RY1. In a preferred embodiment, the third drive module 50 includes a transistor Q3, a resistor R3, and resistors R6-R7. The base of the transistor Q3 is connected to the control module 10 via resistor R3, the emitter of the transistor Q3 is connected to the first drive module 30, the collector of the transistor Q3 is connected to one end of resistor R7 and the control terminal of the thyristor TR1 via resistor R6, and the other end of resistor R7 is connected to the input terminal of the thyristor TR1 and the power supply ACL. The control module 10 controls the switching on and off of the thyristor TR1 through the transistor Q3, and in cooperation with the relay RY1, controls the energization and de-energization of the motor 20, which can meet the safety requirements.

[0034] In some embodiments, the second drive module 40 includes a transistor Q1, a resistor R5, and a diode FD2. The base of transistor Q1 is connected to the control module 10 via resistor R5, the emitter of transistor Q1 is connected to the control module 10, and the collector of transistor Q1 is connected to the cathode of diode FD2, one end of the coil of relay RY1, one end of the coil of relay RY2, and one end of the coil of relay RY3, respectively. The anode of diode FD2 is connected to the other end of the coil of relay RY2 and the other end of the coil of relay RY3, respectively. The control module 10 controls the coils of relay RY1 and relay RY2 to be energized and de-energized through transistor Q1, thereby realizing the linkage short circuit between the main winding and auxiliary winding of motor 20.

[0035] In some embodiments, a four-pole motor brake control circuit further includes resistors R1 and R2 connected in series between the other end of the safety switch SW and the control module 10.

[0036] A food processor, including the aforementioned control circuit.

[0037] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A braking control circuit for a four-pole motor, characterized in that: It includes a control module (10), a safety switch SW, a motor (20), a first drive module (30), a second drive module (40), and relays RY1-RY3; The motor (20) has a main winding and an auxiliary winding; The input terminals of the first drive module (30) and the second drive module (40) are connected to the control module (10); The coil of the relay RY1 is connected to the output terminal of the first drive module (30). One end of the normally open contact of the relay RY1 is connected to the power supply ACL, and the other end of the normally open contact of the relay RY1 is connected to one end of the main winding of the motor (20) and one end of the normally open contact of the relay RY2. The other end of the normally open contact of relay RY2 and one end of the normally closed contact of relay RY2 are connected to one end of the auxiliary winding of the motor (20). The other end of the normally closed contact of relay RY2 and one end of the normally closed contact of relay RY3 are connected. The coils of relay RY2 and relay RY3 are connected to the second drive module (40) and the +5V power supply. One end of the normally open contact of the relay RY3 is connected to the other end of the main winding of the motor (20), and the other end of the normally open contact and the other end of the normally closed contact of the relay RY3 are connected to the other end of the auxiliary winding of the motor (20). One end of the safety switch SW is connected to the power supply ACN, and the other end of the safety switch SW is connected to the control module (10) and the other end of the main winding of the motor (20).

2. The four-pole motor brake control circuit according to claim 1, characterized in that: The first driving module (30) includes a transistor Q2, a resistor R4 and a diode FD1. The base of transistor Q2 is connected to the control module (10) via resistor R4. The emitter of transistor Q2 is connected to the control module (10). The collector of transistor Q2 is connected to one end of the coil of relay RY1 and the anode of diode FD1. The cathode of diode FD1 is connected to the other end of the coil of relay RY1.

3. The four-pole motor brake control circuit according to claim 2, characterized in that: It also includes a third drive module (50) and a thyristor TR1. The input terminal of the third drive module (50) is connected to the control module (10), the output terminal of the third drive module (50) is connected to the control terminal of the thyristor TR1, the input terminal of the thyristor TR1 is connected to the power supply ACL, and the output terminal of the thyristor TR1 is connected to one end of the normally open contact of the relay RY1.

4. The four-pole motor brake control circuit according to claim 3, characterized in that: The third driving module (50) includes a transistor Q3, a resistor R3, and resistors R6-R7. The base of transistor Q3 is connected to the control module (10) via resistor R3, the emitter of transistor Q3 is connected to the first driving module (30), and the collector of transistor Q3 is connected to one end of resistor R7 and the control terminal of the thyristor TR1 via resistor R6. The other end of resistor R7 is connected to the input terminal of the thyristor TR1 and the power supply ACL.

5. The four-pole motor brake control circuit according to claim 1, characterized in that: The second driving module (40) includes a transistor Q1, a resistor R5, and a diode FD2. The base of transistor Q1 is connected to the control module (10) via resistor R5. The emitter of transistor Q1 is connected to the control module (10). The collector of transistor Q1 is connected to the cathode of diode FD2, one end of the coil of relay RY1, one end of the coil of relay RY2, and one end of the coil of relay RY3. The anode of diode FD2 is connected to the other end of the coil of relay RY2 and the other end of the coil of relay RY3.

6. The four-pole motor brake control circuit according to claim 1, characterized in that: It also includes resistors R1 and R2 connected in series between the other end of the safety switch SW and the control module (10).

7. A food processor, characterized in that: Includes the control circuit described in any one of claims 1-6.

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